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fuchsia / third_party / vim / refs/tags/v8.0.0027 / . / src / eval.c
blob: 18eb87936ba878f4f9b82c748dc1c63f199fe176 [file] [log] [blame]
/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* eval.c: Expression evaluation.
*/
#define USING_FLOAT_STUFF
#include "vim.h"
#if defined(FEAT_EVAL) || defined(PROTO)
#ifdef VMS
# include <float.h>
#endif
#define DICT_MAXNEST 100 /* maximum nesting of lists and dicts */
static char *e_letunexp = N_("E18: Unexpected characters in :let");
static char *e_undefvar = N_("E121: Undefined variable: %s");
static char *e_missbrac = N_("E111: Missing ']'");
static char *e_dictrange = N_("E719: Cannot use [:] with a Dictionary");
static char *e_letwrong = N_("E734: Wrong variable type for %s=");
static char *e_illvar = N_("E461: Illegal variable name: %s");
#ifdef FEAT_FLOAT
static char *e_float_as_string = N_("E806: using Float as a String");
#endif
#define NAMESPACE_CHAR (char_u *)"abglstvw"
static dictitem_T globvars_var; /* variable used for g: */
#define globvarht globvardict.dv_hashtab
/*
* Old Vim variables such as "v:version" are also available without the "v:".
* Also in functions. We need a special hashtable for them.
*/
static hashtab_T compat_hashtab;
/*
* When recursively copying lists and dicts we need to remember which ones we
* have done to avoid endless recursiveness. This unique ID is used for that.
* The last bit is used for previous_funccal, ignored when comparing.
*/
static int current_copyID = 0;
/*
* Array to hold the hashtab with variables local to each sourced script.
* Each item holds a variable (nameless) that points to the dict_T.
*/
typedef struct
{
dictitem_T sv_var;
dict_T sv_dict;
} scriptvar_T;
static garray_T ga_scripts = {0, 0, sizeof(scriptvar_T *), 4, NULL};
#define SCRIPT_SV(id) (((scriptvar_T **)ga_scripts.ga_data)[(id) - 1])
#define SCRIPT_VARS(id) (SCRIPT_SV(id)->sv_dict.dv_hashtab)
static int echo_attr = 0; /* attributes used for ":echo" */
/* The names of packages that once were loaded are remembered. */
static garray_T ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
/*
* Info used by a ":for" loop.
*/
typedef struct
{
int fi_semicolon; /* TRUE if ending in '; var]' */
int fi_varcount; /* nr of variables in the list */
listwatch_T fi_lw; /* keep an eye on the item used. */
list_T *fi_list; /* list being used */
} forinfo_T;
/*
* Array to hold the value of v: variables.
* The value is in a dictitem, so that it can also be used in the v: scope.
* The reason to use this table anyway is for very quick access to the
* variables with the VV_ defines.
*/
/* values for vv_flags: */
#define VV_COMPAT 1 /* compatible, also used without "v:" */
#define VV_RO 2 /* read-only */
#define VV_RO_SBX 4 /* read-only in the sandbox */
#define VV_NAME(s, t) s, {{t, 0, {0}}, 0, {0}}
static struct vimvar
{
char *vv_name; /* name of variable, without v: */
dictitem16_T vv_di; /* value and name for key (max 16 chars!) */
char vv_flags; /* VV_COMPAT, VV_RO, VV_RO_SBX */
} vimvars[VV_LEN] =
{
/*
* The order here must match the VV_ defines in vim.h!
* Initializing a union does not work, leave tv.vval empty to get zero's.
*/
{VV_NAME("count", VAR_NUMBER), VV_COMPAT+VV_RO},
{VV_NAME("count1", VAR_NUMBER), VV_RO},
{VV_NAME("prevcount", VAR_NUMBER), VV_RO},
{VV_NAME("errmsg", VAR_STRING), VV_COMPAT},
{VV_NAME("warningmsg", VAR_STRING), 0},
{VV_NAME("statusmsg", VAR_STRING), 0},
{VV_NAME("shell_error", VAR_NUMBER), VV_COMPAT+VV_RO},
{VV_NAME("this_session", VAR_STRING), VV_COMPAT},
{VV_NAME("version", VAR_NUMBER), VV_COMPAT+VV_RO},
{VV_NAME("lnum", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("termresponse", VAR_STRING), VV_RO},
{VV_NAME("fname", VAR_STRING), VV_RO},
{VV_NAME("lang", VAR_STRING), VV_RO},
{VV_NAME("lc_time", VAR_STRING), VV_RO},
{VV_NAME("ctype", VAR_STRING), VV_RO},
{VV_NAME("charconvert_from", VAR_STRING), VV_RO},
{VV_NAME("charconvert_to", VAR_STRING), VV_RO},
{VV_NAME("fname_in", VAR_STRING), VV_RO},
{VV_NAME("fname_out", VAR_STRING), VV_RO},
{VV_NAME("fname_new", VAR_STRING), VV_RO},
{VV_NAME("fname_diff", VAR_STRING), VV_RO},
{VV_NAME("cmdarg", VAR_STRING), VV_RO},
{VV_NAME("foldstart", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("foldend", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("folddashes", VAR_STRING), VV_RO_SBX},
{VV_NAME("foldlevel", VAR_NUMBER), VV_RO_SBX},
{VV_NAME("progname", VAR_STRING), VV_RO},
{VV_NAME("servername", VAR_STRING), VV_RO},
{VV_NAME("dying", VAR_NUMBER), VV_RO},
{VV_NAME("exception", VAR_STRING), VV_RO},
{VV_NAME("throwpoint", VAR_STRING), VV_RO},
{VV_NAME("register", VAR_STRING), VV_RO},
{VV_NAME("cmdbang", VAR_NUMBER), VV_RO},
{VV_NAME("insertmode", VAR_STRING), VV_RO},
{VV_NAME("val", VAR_UNKNOWN), VV_RO},
{VV_NAME("key", VAR_UNKNOWN), VV_RO},
{VV_NAME("profiling", VAR_NUMBER), VV_RO},
{VV_NAME("fcs_reason", VAR_STRING), VV_RO},
{VV_NAME("fcs_choice", VAR_STRING), 0},
{VV_NAME("beval_bufnr", VAR_NUMBER), VV_RO},
{VV_NAME("beval_winnr", VAR_NUMBER), VV_RO},
{VV_NAME("beval_winid", VAR_NUMBER), VV_RO},
{VV_NAME("beval_lnum", VAR_NUMBER), VV_RO},
{VV_NAME("beval_col", VAR_NUMBER), VV_RO},
{VV_NAME("beval_text", VAR_STRING), VV_RO},
{VV_NAME("scrollstart", VAR_STRING), 0},
{VV_NAME("swapname", VAR_STRING), VV_RO},
{VV_NAME("swapchoice", VAR_STRING), 0},
{VV_NAME("swapcommand", VAR_STRING), VV_RO},
{VV_NAME("char", VAR_STRING), 0},
{VV_NAME("mouse_win", VAR_NUMBER), 0},
{VV_NAME("mouse_winid", VAR_NUMBER), 0},
{VV_NAME("mouse_lnum", VAR_NUMBER), 0},
{VV_NAME("mouse_col", VAR_NUMBER), 0},
{VV_NAME("operator", VAR_STRING), VV_RO},
{VV_NAME("searchforward", VAR_NUMBER), 0},
{VV_NAME("hlsearch", VAR_NUMBER), 0},
{VV_NAME("oldfiles", VAR_LIST), 0},
{VV_NAME("windowid", VAR_NUMBER), VV_RO},
{VV_NAME("progpath", VAR_STRING), VV_RO},
{VV_NAME("completed_item", VAR_DICT), VV_RO},
{VV_NAME("option_new", VAR_STRING), VV_RO},
{VV_NAME("option_old", VAR_STRING), VV_RO},
{VV_NAME("option_type", VAR_STRING), VV_RO},
{VV_NAME("errors", VAR_LIST), 0},
{VV_NAME("false", VAR_SPECIAL), VV_RO},
{VV_NAME("true", VAR_SPECIAL), VV_RO},
{VV_NAME("null", VAR_SPECIAL), VV_RO},
{VV_NAME("none", VAR_SPECIAL), VV_RO},
{VV_NAME("vim_did_enter", VAR_NUMBER), VV_RO},
{VV_NAME("testing", VAR_NUMBER), 0},
{VV_NAME("t_number", VAR_NUMBER), VV_RO},
{VV_NAME("t_string", VAR_NUMBER), VV_RO},
{VV_NAME("t_func", VAR_NUMBER), VV_RO},
{VV_NAME("t_list", VAR_NUMBER), VV_RO},
{VV_NAME("t_dict", VAR_NUMBER), VV_RO},
{VV_NAME("t_float", VAR_NUMBER), VV_RO},
{VV_NAME("t_bool", VAR_NUMBER), VV_RO},
{VV_NAME("t_none", VAR_NUMBER), VV_RO},
{VV_NAME("t_job", VAR_NUMBER), VV_RO},
{VV_NAME("t_channel", VAR_NUMBER), VV_RO},
};
/* shorthand */
#define vv_type vv_di.di_tv.v_type
#define vv_nr vv_di.di_tv.vval.v_number
#define vv_float vv_di.di_tv.vval.v_float
#define vv_str vv_di.di_tv.vval.v_string
#define vv_list vv_di.di_tv.vval.v_list
#define vv_dict vv_di.di_tv.vval.v_dict
#define vv_tv vv_di.di_tv
static dictitem_T vimvars_var; /* variable used for v: */
#define vimvarht vimvardict.dv_hashtab
static int ex_let_vars(char_u *arg, typval_T *tv, int copy, int semicolon, int var_count, char_u *nextchars);
static char_u *skip_var_list(char_u *arg, int *var_count, int *semicolon);
static char_u *skip_var_one(char_u *arg);
static void list_glob_vars(int *first);
static void list_buf_vars(int *first);
static void list_win_vars(int *first);
#ifdef FEAT_WINDOWS
static void list_tab_vars(int *first);
#endif
static void list_vim_vars(int *first);
static void list_script_vars(int *first);
static char_u *list_arg_vars(exarg_T *eap, char_u *arg, int *first);
static char_u *ex_let_one(char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op);
static void set_var_lval(lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op);
static int tv_op(typval_T *tv1, typval_T *tv2, char_u *op);
static void ex_unletlock(exarg_T *eap, char_u *argstart, int deep);
static int do_unlet_var(lval_T *lp, char_u *name_end, int forceit);
static int do_lock_var(lval_T *lp, char_u *name_end, int deep, int lock);
static void item_lock(typval_T *tv, int deep, int lock);
static int eval2(char_u **arg, typval_T *rettv, int evaluate);
static int eval3(char_u **arg, typval_T *rettv, int evaluate);
static int eval4(char_u **arg, typval_T *rettv, int evaluate);
static int eval5(char_u **arg, typval_T *rettv, int evaluate);
static int eval6(char_u **arg, typval_T *rettv, int evaluate, int want_string);
static int eval7(char_u **arg, typval_T *rettv, int evaluate, int want_string);
static int eval_index(char_u **arg, typval_T *rettv, int evaluate, int verbose);
static int get_string_tv(char_u **arg, typval_T *rettv, int evaluate);
static int get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate);
static int free_unref_items(int copyID);
static int get_env_tv(char_u **arg, typval_T *rettv, int evaluate);
static int get_env_len(char_u **arg);
static char_u * make_expanded_name(char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end);
static void check_vars(char_u *name, int len);
static typval_T *alloc_string_tv(char_u *string);
static void delete_var(hashtab_T *ht, hashitem_T *hi);
static void list_one_var(dictitem_T *v, char_u *prefix, int *first);
static void list_one_var_a(char_u *prefix, char_u *name, int type, char_u *string, int *first);
static char_u *find_option_end(char_u **arg, int *opt_flags);
#ifdef EBCDIC
static int compare_func_name(const void *s1, const void *s2);
static void sortFunctions();
#endif
/* for VIM_VERSION_ defines */
#include "version.h"
/*
* Initialize the global and v: variables.
*/
void
eval_init(void)
{
int i;
struct vimvar *p;
init_var_dict(&globvardict, &globvars_var, VAR_DEF_SCOPE);
init_var_dict(&vimvardict, &vimvars_var, VAR_SCOPE);
vimvardict.dv_lock = VAR_FIXED;
hash_init(&compat_hashtab);
func_init();
for (i = 0; i < VV_LEN; ++i)
{
p = &vimvars[i];
if (STRLEN(p->vv_name) > 16)
{
EMSG("INTERNAL: name too long, increase size of dictitem16_T");
getout(1);
}
STRCPY(p->vv_di.di_key, p->vv_name);
if (p->vv_flags & VV_RO)
p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
else if (p->vv_flags & VV_RO_SBX)
p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
else
p->vv_di.di_flags = DI_FLAGS_FIX;
/* add to v: scope dict, unless the value is not always available */
if (p->vv_type != VAR_UNKNOWN)
hash_add(&vimvarht, p->vv_di.di_key);
if (p->vv_flags & VV_COMPAT)
/* add to compat scope dict */
hash_add(&compat_hashtab, p->vv_di.di_key);
}
vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
set_vim_var_nr(VV_SEARCHFORWARD, 1L);
set_vim_var_nr(VV_HLSEARCH, 1L);
set_vim_var_dict(VV_COMPLETED_ITEM, dict_alloc());
set_vim_var_list(VV_ERRORS, list_alloc());
set_vim_var_nr(VV_FALSE, VVAL_FALSE);
set_vim_var_nr(VV_TRUE, VVAL_TRUE);
set_vim_var_nr(VV_NONE, VVAL_NONE);
set_vim_var_nr(VV_NULL, VVAL_NULL);
set_vim_var_nr(VV_TYPE_NUMBER, VAR_TYPE_NUMBER);
set_vim_var_nr(VV_TYPE_STRING, VAR_TYPE_STRING);
set_vim_var_nr(VV_TYPE_FUNC, VAR_TYPE_FUNC);
set_vim_var_nr(VV_TYPE_LIST, VAR_TYPE_LIST);
set_vim_var_nr(VV_TYPE_DICT, VAR_TYPE_DICT);
set_vim_var_nr(VV_TYPE_FLOAT, VAR_TYPE_FLOAT);
set_vim_var_nr(VV_TYPE_BOOL, VAR_TYPE_BOOL);
set_vim_var_nr(VV_TYPE_NONE, VAR_TYPE_NONE);
set_vim_var_nr(VV_TYPE_JOB, VAR_TYPE_JOB);
set_vim_var_nr(VV_TYPE_CHANNEL, VAR_TYPE_CHANNEL);
set_reg_var(0); /* default for v:register is not 0 but '"' */
#ifdef EBCDIC
/*
* Sort the function table, to enable binary search.
*/
sortFunctions();
#endif
}
#if defined(EXITFREE) || defined(PROTO)
void
eval_clear(void)
{
int i;
struct vimvar *p;
for (i = 0; i < VV_LEN; ++i)
{
p = &vimvars[i];
if (p->vv_di.di_tv.v_type == VAR_STRING)
{
vim_free(p->vv_str);
p->vv_str = NULL;
}
else if (p->vv_di.di_tv.v_type == VAR_LIST)
{
list_unref(p->vv_list);
p->vv_list = NULL;
}
}
hash_clear(&vimvarht);
hash_init(&vimvarht); /* garbage_collect() will access it */
hash_clear(&compat_hashtab);
free_scriptnames();
# if defined(FEAT_CMDL_COMPL)
free_locales();
# endif
/* global variables */
vars_clear(&globvarht);
/* autoloaded script names */
ga_clear_strings(&ga_loaded);
/* Script-local variables. First clear all the variables and in a second
* loop free the scriptvar_T, because a variable in one script might hold
* a reference to the whole scope of another script. */
for (i = 1; i <= ga_scripts.ga_len; ++i)
vars_clear(&SCRIPT_VARS(i));
for (i = 1; i <= ga_scripts.ga_len; ++i)
vim_free(SCRIPT_SV(i));
ga_clear(&ga_scripts);
/* unreferenced lists and dicts */
(void)garbage_collect(FALSE);
/* functions */
free_all_functions();
}
#endif
/*
* Set an internal variable to a string value. Creates the variable if it does
* not already exist.
*/
void
set_internal_string_var(char_u *name, char_u *value)
{
char_u *val;
typval_T *tvp;
val = vim_strsave(value);
if (val != NULL)
{
tvp = alloc_string_tv(val);
if (tvp != NULL)
{
set_var(name, tvp, FALSE);
free_tv(tvp);
}
}
}
static lval_T *redir_lval = NULL;
#define EVALCMD_BUSY (redir_lval == (lval_T *)&redir_lval)
static garray_T redir_ga; /* only valid when redir_lval is not NULL */
static char_u *redir_endp = NULL;
static char_u *redir_varname = NULL;
/*
* Start recording command output to a variable
* When "append" is TRUE append to an existing variable.
* Returns OK if successfully completed the setup. FAIL otherwise.
*/
int
var_redir_start(char_u *name, int append)
{
int save_emsg;
int err;
typval_T tv;
/* Catch a bad name early. */
if (!eval_isnamec1(*name))
{
EMSG(_(e_invarg));
return FAIL;
}
/* Make a copy of the name, it is used in redir_lval until redir ends. */
redir_varname = vim_strsave(name);
if (redir_varname == NULL)
return FAIL;
redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
if (redir_lval == NULL)
{
var_redir_stop();
return FAIL;
}
/* The output is stored in growarray "redir_ga" until redirection ends. */
ga_init2(&redir_ga, (int)sizeof(char), 500);
/* Parse the variable name (can be a dict or list entry). */
redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, 0,
FNE_CHECK_START);
if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
{
clear_lval(redir_lval);
if (redir_endp != NULL && *redir_endp != NUL)
/* Trailing characters are present after the variable name */
EMSG(_(e_trailing));
else
EMSG(_(e_invarg));
redir_endp = NULL; /* don't store a value, only cleanup */
var_redir_stop();
return FAIL;
}
/* check if we can write to the variable: set it to or append an empty
* string */
save_emsg = did_emsg;
did_emsg = FALSE;
tv.v_type = VAR_STRING;
tv.vval.v_string = (char_u *)"";
if (append)
set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
else
set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
clear_lval(redir_lval);
err = did_emsg;
did_emsg |= save_emsg;
if (err)
{
redir_endp = NULL; /* don't store a value, only cleanup */
var_redir_stop();
return FAIL;
}
return OK;
}
/*
* Append "value[value_len]" to the variable set by var_redir_start().
* The actual appending is postponed until redirection ends, because the value
* appended may in fact be the string we write to, changing it may cause freed
* memory to be used:
* :redir => foo
* :let foo
* :redir END
*/
void
var_redir_str(char_u *value, int value_len)
{
int len;
if (redir_lval == NULL)
return;
if (value_len == -1)
len = (int)STRLEN(value); /* Append the entire string */
else
len = value_len; /* Append only "value_len" characters */
if (ga_grow(&redir_ga, len) == OK)
{
mch_memmove((char *)redir_ga.ga_data + redir_ga.ga_len, value, len);
redir_ga.ga_len += len;
}
else
var_redir_stop();
}
/*
* Stop redirecting command output to a variable.
* Frees the allocated memory.
*/
void
var_redir_stop(void)
{
typval_T tv;
if (EVALCMD_BUSY)
{
redir_lval = NULL;
return;
}
if (redir_lval != NULL)
{
/* If there was no error: assign the text to the variable. */
if (redir_endp != NULL)
{
ga_append(&redir_ga, NUL); /* Append the trailing NUL. */
tv.v_type = VAR_STRING;
tv.vval.v_string = redir_ga.ga_data;
/* Call get_lval() again, if it's inside a Dict or List it may
* have changed. */
redir_endp = get_lval(redir_varname, NULL, redir_lval,
FALSE, FALSE, 0, FNE_CHECK_START);
if (redir_endp != NULL && redir_lval->ll_name != NULL)
set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
clear_lval(redir_lval);
}
/* free the collected output */
vim_free(redir_ga.ga_data);
redir_ga.ga_data = NULL;
vim_free(redir_lval);
redir_lval = NULL;
}
vim_free(redir_varname);
redir_varname = NULL;
}
# if defined(FEAT_MBYTE) || defined(PROTO)
int
eval_charconvert(
char_u *enc_from,
char_u *enc_to,
char_u *fname_from,
char_u *fname_to)
{
int err = FALSE;
set_vim_var_string(VV_CC_FROM, enc_from, -1);
set_vim_var_string(VV_CC_TO, enc_to, -1);
set_vim_var_string(VV_FNAME_IN, fname_from, -1);
set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
if (eval_to_bool(p_ccv, &err, NULL, FALSE))
err = TRUE;
set_vim_var_string(VV_CC_FROM, NULL, -1);
set_vim_var_string(VV_CC_TO, NULL, -1);
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_FNAME_OUT, NULL, -1);
if (err)
return FAIL;
return OK;
}
# endif
# if defined(FEAT_POSTSCRIPT) || defined(PROTO)
int
eval_printexpr(char_u *fname, char_u *args)
{
int err = FALSE;
set_vim_var_string(VV_FNAME_IN, fname, -1);
set_vim_var_string(VV_CMDARG, args, -1);
if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
err = TRUE;
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_CMDARG, NULL, -1);
if (err)
{
mch_remove(fname);
return FAIL;
}
return OK;
}
# endif
# if defined(FEAT_DIFF) || defined(PROTO)
void
eval_diff(
char_u *origfile,
char_u *newfile,
char_u *outfile)
{
int err = FALSE;
set_vim_var_string(VV_FNAME_IN, origfile, -1);
set_vim_var_string(VV_FNAME_NEW, newfile, -1);
set_vim_var_string(VV_FNAME_OUT, outfile, -1);
(void)eval_to_bool(p_dex, &err, NULL, FALSE);
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_FNAME_NEW, NULL, -1);
set_vim_var_string(VV_FNAME_OUT, NULL, -1);
}
void
eval_patch(
char_u *origfile,
char_u *difffile,
char_u *outfile)
{
int err;
set_vim_var_string(VV_FNAME_IN, origfile, -1);
set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
set_vim_var_string(VV_FNAME_OUT, outfile, -1);
(void)eval_to_bool(p_pex, &err, NULL, FALSE);
set_vim_var_string(VV_FNAME_IN, NULL, -1);
set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
set_vim_var_string(VV_FNAME_OUT, NULL, -1);
}
# endif
/*
* Top level evaluation function, returning a boolean.
* Sets "error" to TRUE if there was an error.
* Return TRUE or FALSE.
*/
int
eval_to_bool(
char_u *arg,
int *error,
char_u **nextcmd,
int skip) /* only parse, don't execute */
{
typval_T tv;
varnumber_T retval = FALSE;
if (skip)
++emsg_skip;
if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
*error = TRUE;
else
{
*error = FALSE;
if (!skip)
{
retval = (get_tv_number_chk(&tv, error) != 0);
clear_tv(&tv);
}
}
if (skip)
--emsg_skip;
return (int)retval;
}
/*
* Top level evaluation function, returning a string. If "skip" is TRUE,
* only parsing to "nextcmd" is done, without reporting errors. Return
* pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
*/
char_u *
eval_to_string_skip(
char_u *arg,
char_u **nextcmd,
int skip) /* only parse, don't execute */
{
typval_T tv;
char_u *retval;
if (skip)
++emsg_skip;
if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
retval = NULL;
else
{
retval = vim_strsave(get_tv_string(&tv));
clear_tv(&tv);
}
if (skip)
--emsg_skip;
return retval;
}
/*
* Skip over an expression at "*pp".
* Return FAIL for an error, OK otherwise.
*/
int
skip_expr(char_u **pp)
{
typval_T rettv;
*pp = skipwhite(*pp);
return eval1(pp, &rettv, FALSE);
}
/*
* Top level evaluation function, returning a string.
* When "convert" is TRUE convert a List into a sequence of lines and convert
* a Float to a String.
* Return pointer to allocated memory, or NULL for failure.
*/
char_u *
eval_to_string(
char_u *arg,
char_u **nextcmd,
int convert)
{
typval_T tv;
char_u *retval;
garray_T ga;
#ifdef FEAT_FLOAT
char_u numbuf[NUMBUFLEN];
#endif
if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
retval = NULL;
else
{
if (convert && tv.v_type == VAR_LIST)
{
ga_init2(&ga, (int)sizeof(char), 80);
if (tv.vval.v_list != NULL)
{
list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, FALSE, 0);
if (tv.vval.v_list->lv_len > 0)
ga_append(&ga, NL);
}
ga_append(&ga, NUL);
retval = (char_u *)ga.ga_data;
}
#ifdef FEAT_FLOAT
else if (convert && tv.v_type == VAR_FLOAT)
{
vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv.vval.v_float);
retval = vim_strsave(numbuf);
}
#endif
else
retval = vim_strsave(get_tv_string(&tv));
clear_tv(&tv);
}
return retval;
}
/*
* Call eval_to_string() without using current local variables and using
* textlock. When "use_sandbox" is TRUE use the sandbox.
*/
char_u *
eval_to_string_safe(
char_u *arg,
char_u **nextcmd,
int use_sandbox)
{
char_u *retval;
void *save_funccalp;
save_funccalp = save_funccal();
if (use_sandbox)
++sandbox;
++textlock;
retval = eval_to_string(arg, nextcmd, FALSE);
if (use_sandbox)
--sandbox;
--textlock;
restore_funccal(save_funccalp);
return retval;
}
/*
* Top level evaluation function, returning a number.
* Evaluates "expr" silently.
* Returns -1 for an error.
*/
varnumber_T
eval_to_number(char_u *expr)
{
typval_T rettv;
varnumber_T retval;
char_u *p = skipwhite(expr);
++emsg_off;
if (eval1(&p, &rettv, TRUE) == FAIL)
retval = -1;
else
{
retval = get_tv_number_chk(&rettv, NULL);
clear_tv(&rettv);
}
--emsg_off;
return retval;
}
/*
* Prepare v: variable "idx" to be used.
* Save the current typeval in "save_tv".
* When not used yet add the variable to the v: hashtable.
*/
static void
prepare_vimvar(int idx, typval_T *save_tv)
{
*save_tv = vimvars[idx].vv_tv;
if (vimvars[idx].vv_type == VAR_UNKNOWN)
hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
}
/*
* Restore v: variable "idx" to typeval "save_tv".
* When no longer defined, remove the variable from the v: hashtable.
*/
static void
restore_vimvar(int idx, typval_T *save_tv)
{
hashitem_T *hi;
vimvars[idx].vv_tv = *save_tv;
if (vimvars[idx].vv_type == VAR_UNKNOWN)
{
hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
if (HASHITEM_EMPTY(hi))
EMSG2(_(e_intern2), "restore_vimvar()");
else
hash_remove(&vimvarht, hi);
}
}
#if defined(FEAT_SPELL) || defined(PROTO)
/*
* Evaluate an expression to a list with suggestions.
* For the "expr:" part of 'spellsuggest'.
* Returns NULL when there is an error.
*/
list_T *
eval_spell_expr(char_u *badword, char_u *expr)
{
typval_T save_val;
typval_T rettv;
list_T *list = NULL;
char_u *p = skipwhite(expr);
/* Set "v:val" to the bad word. */
prepare_vimvar(VV_VAL, &save_val);
vimvars[VV_VAL].vv_type = VAR_STRING;
vimvars[VV_VAL].vv_str = badword;
if (p_verbose == 0)
++emsg_off;
if (eval1(&p, &rettv, TRUE) == OK)
{
if (rettv.v_type != VAR_LIST)
clear_tv(&rettv);
else
list = rettv.vval.v_list;
}
if (p_verbose == 0)
--emsg_off;
restore_vimvar(VV_VAL, &save_val);
return list;
}
/*
* "list" is supposed to contain two items: a word and a number. Return the
* word in "pp" and the number as the return value.
* Return -1 if anything isn't right.
* Used to get the good word and score from the eval_spell_expr() result.
*/
int
get_spellword(list_T *list, char_u **pp)
{
listitem_T *li;
li = list->lv_first;
if (li == NULL)
return -1;
*pp = get_tv_string(&li->li_tv);
li = li->li_next;
if (li == NULL)
return -1;
return (int)get_tv_number(&li->li_tv);
}
#endif
/*
* Top level evaluation function.
* Returns an allocated typval_T with the result.
* Returns NULL when there is an error.
*/
typval_T *
eval_expr(char_u *arg, char_u **nextcmd)
{
typval_T *tv;
tv = (typval_T *)alloc(sizeof(typval_T));
if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL)
{
vim_free(tv);
tv = NULL;
}
return tv;
}
/*
* Call some vimL function and return the result in "*rettv".
* Uses argv[argc] for the function arguments. Only Number and String
* arguments are currently supported.
* Returns OK or FAIL.
*/
int
call_vim_function(
char_u *func,
int argc,
char_u **argv,
int safe, /* use the sandbox */
int str_arg_only, /* all arguments are strings */
typval_T *rettv)
{
typval_T *argvars;
varnumber_T n;
int len;
int i;
int doesrange;
void *save_funccalp = NULL;
int ret;
argvars = (typval_T *)alloc((unsigned)((argc + 1) * sizeof(typval_T)));
if (argvars == NULL)
return FAIL;
for (i = 0; i < argc; i++)
{
/* Pass a NULL or empty argument as an empty string */
if (argv[i] == NULL || *argv[i] == NUL)
{
argvars[i].v_type = VAR_STRING;
argvars[i].vval.v_string = (char_u *)"";
continue;
}
if (str_arg_only)
len = 0;
else
/* Recognize a number argument, the others must be strings. */
vim_str2nr(argv[i], NULL, &len, STR2NR_ALL, &n, NULL, 0);
if (len != 0 && len == (int)STRLEN(argv[i]))
{
argvars[i].v_type = VAR_NUMBER;
argvars[i].vval.v_number = n;
}
else
{
argvars[i].v_type = VAR_STRING;
argvars[i].vval.v_string = argv[i];
}
}
if (safe)
{
save_funccalp = save_funccal();
++sandbox;
}
rettv->v_type = VAR_UNKNOWN; /* clear_tv() uses this */
ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars, NULL,
curwin->w_cursor.lnum, curwin->w_cursor.lnum,
&doesrange, TRUE, NULL, NULL);
if (safe)
{
--sandbox;
restore_funccal(save_funccalp);
}
vim_free(argvars);
if (ret == FAIL)
clear_tv(rettv);
return ret;
}
/*
* Call vimL function "func" and return the result as a number.
* Returns -1 when calling the function fails.
* Uses argv[argc] for the function arguments.
*/
varnumber_T
call_func_retnr(
char_u *func,
int argc,
char_u **argv,
int safe) /* use the sandbox */
{
typval_T rettv;
varnumber_T retval;
/* All arguments are passed as strings, no conversion to number. */
if (call_vim_function(func, argc, argv, safe, TRUE, &rettv) == FAIL)
return -1;
retval = get_tv_number_chk(&rettv, NULL);
clear_tv(&rettv);
return retval;
}
#if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) \
|| defined(FEAT_COMPL_FUNC) || defined(PROTO)
# if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
/*
* Call vimL function "func" and return the result as a string.
* Returns NULL when calling the function fails.
* Uses argv[argc] for the function arguments.
*/
void *
call_func_retstr(
char_u *func,
int argc,
char_u **argv,
int safe) /* use the sandbox */
{
typval_T rettv;
char_u *retval;
/* All arguments are passed as strings, no conversion to number. */
if (call_vim_function(func, argc, argv, safe, TRUE, &rettv) == FAIL)
return NULL;
retval = vim_strsave(get_tv_string(&rettv));
clear_tv(&rettv);
return retval;
}
# endif
/*
* Call vimL function "func" and return the result as a List.
* Uses argv[argc] for the function arguments.
* Returns NULL when there is something wrong.
*/
void *
call_func_retlist(
char_u *func,
int argc,
char_u **argv,
int safe) /* use the sandbox */
{
typval_T rettv;
/* All arguments are passed as strings, no conversion to number. */
if (call_vim_function(func, argc, argv, safe, TRUE, &rettv) == FAIL)
return NULL;
if (rettv.v_type != VAR_LIST)
{
clear_tv(&rettv);
return NULL;
}
return rettv.vval.v_list;
}
#endif
#ifdef FEAT_FOLDING
/*
* Evaluate 'foldexpr'. Returns the foldlevel, and any character preceding
* it in "*cp". Doesn't give error messages.
*/
int
eval_foldexpr(char_u *arg, int *cp)
{
typval_T tv;
varnumber_T retval;
char_u *s;
int use_sandbox = was_set_insecurely((char_u *)"foldexpr",
OPT_LOCAL);
++emsg_off;
if (use_sandbox)
++sandbox;
++textlock;
*cp = NUL;
if (eval0(arg, &tv, NULL, TRUE) == FAIL)
retval = 0;
else
{
/* If the result is a number, just return the number. */
if (tv.v_type == VAR_NUMBER)
retval = tv.vval.v_number;
else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
retval = 0;
else
{
/* If the result is a string, check if there is a non-digit before
* the number. */
s = tv.vval.v_string;
if (!VIM_ISDIGIT(*s) && *s != '-')
*cp = *s++;
retval = atol((char *)s);
}
clear_tv(&tv);
}
--emsg_off;
if (use_sandbox)
--sandbox;
--textlock;
return (int)retval;
}
#endif
/*
* ":let" list all variable values
* ":let var1 var2" list variable values
* ":let var = expr" assignment command.
* ":let var += expr" assignment command.
* ":let var -= expr" assignment command.
* ":let var .= expr" assignment command.
* ":let [var1, var2] = expr" unpack list.
*/
void
ex_let(exarg_T *eap)
{
char_u *arg = eap->arg;
char_u *expr = NULL;
typval_T rettv;
int i;
int var_count = 0;
int semicolon = 0;
char_u op[2];
char_u *argend;
int first = TRUE;
argend = skip_var_list(arg, &var_count, &semicolon);
if (argend == NULL)
return;
if (argend > arg && argend[-1] == '.') /* for var.='str' */
--argend;
expr = skipwhite(argend);
if (*expr != '=' && !(vim_strchr((char_u *)"+-.", *expr) != NULL
&& expr[1] == '='))
{
/*
* ":let" without "=": list variables
*/
if (*arg == '[')
EMSG(_(e_invarg));
else if (!ends_excmd(*arg))
/* ":let var1 var2" */
arg = list_arg_vars(eap, arg, &first);
else if (!eap->skip)
{
/* ":let" */
list_glob_vars(&first);
list_buf_vars(&first);
list_win_vars(&first);
#ifdef FEAT_WINDOWS
list_tab_vars(&first);
#endif
list_script_vars(&first);
list_func_vars(&first);
list_vim_vars(&first);
}
eap->nextcmd = check_nextcmd(arg);
}
else
{
op[0] = '=';
op[1] = NUL;
if (*expr != '=')
{
if (vim_strchr((char_u *)"+-.", *expr) != NULL)
op[0] = *expr; /* +=, -= or .= */
expr = skipwhite(expr + 2);
}
else
expr = skipwhite(expr + 1);
if (eap->skip)
++emsg_skip;
i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
if (eap->skip)
{
if (i != FAIL)
clear_tv(&rettv);
--emsg_skip;
}
else if (i != FAIL)
{
(void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
op);
clear_tv(&rettv);
}
}
}
/*
* Assign the typevalue "tv" to the variable or variables at "arg_start".
* Handles both "var" with any type and "[var, var; var]" with a list type.
* When "nextchars" is not NULL it points to a string with characters that
* must appear after the variable(s). Use "+", "-" or "." for add, subtract
* or concatenate.
* Returns OK or FAIL;
*/
static int
ex_let_vars(
char_u *arg_start,
typval_T *tv,
int copy, /* copy values from "tv", don't move */
int semicolon, /* from skip_var_list() */
int var_count, /* from skip_var_list() */
char_u *nextchars)
{
char_u *arg = arg_start;
list_T *l;
int i;
listitem_T *item;
typval_T ltv;
if (*arg != '[')
{
/*
* ":let var = expr" or ":for var in list"
*/
if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
return FAIL;
return OK;
}
/*
* ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
*/
if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
{
EMSG(_(e_listreq));
return FAIL;
}
i = list_len(l);
if (semicolon == 0 && var_count < i)
{
EMSG(_("E687: Less targets than List items"));
return FAIL;
}
if (var_count - semicolon > i)
{
EMSG(_("E688: More targets than List items"));
return FAIL;
}
item = l->lv_first;
while (*arg != ']')
{
arg = skipwhite(arg + 1);
arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
item = item->li_next;
if (arg == NULL)
return FAIL;
arg = skipwhite(arg);
if (*arg == ';')
{
/* Put the rest of the list (may be empty) in the var after ';'.
* Create a new list for this. */
l = list_alloc();
if (l == NULL)
return FAIL;
while (item != NULL)
{
list_append_tv(l, &item->li_tv);
item = item->li_next;
}
ltv.v_type = VAR_LIST;
ltv.v_lock = 0;
ltv.vval.v_list = l;
l->lv_refcount = 1;
arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
(char_u *)"]", nextchars);
clear_tv(&ltv);
if (arg == NULL)
return FAIL;
break;
}
else if (*arg != ',' && *arg != ']')
{
EMSG2(_(e_intern2), "ex_let_vars()");
return FAIL;
}
}
return OK;
}
/*
* Skip over assignable variable "var" or list of variables "[var, var]".
* Used for ":let varvar = expr" and ":for varvar in expr".
* For "[var, var]" increment "*var_count" for each variable.
* for "[var, var; var]" set "semicolon".
* Return NULL for an error.
*/
static char_u *
skip_var_list(
char_u *arg,
int *var_count,
int *semicolon)
{
char_u *p, *s;
if (*arg == '[')
{
/* "[var, var]": find the matching ']'. */
p = arg;
for (;;)
{
p = skipwhite(p + 1); /* skip whites after '[', ';' or ',' */
s = skip_var_one(p);
if (s == p)
{
EMSG2(_(e_invarg2), p);
return NULL;
}
++*var_count;
p = skipwhite(s);
if (*p == ']')
break;
else if (*p == ';')
{
if (*semicolon == 1)
{
EMSG(_("Double ; in list of variables"));
return NULL;
}
*semicolon = 1;
}
else if (*p != ',')
{
EMSG2(_(e_invarg2), p);
return NULL;
}
}
return p + 1;
}
else
return skip_var_one(arg);
}
/*
* Skip one (assignable) variable name, including @r, $VAR, &option, d.key,
* l[idx].
*/
static char_u *
skip_var_one(char_u *arg)
{
if (*arg == '@' && arg[1] != NUL)
return arg + 2;
return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
}
/*
* List variables for hashtab "ht" with prefix "prefix".
* If "empty" is TRUE also list NULL strings as empty strings.
*/
void
list_hashtable_vars(
hashtab_T *ht,
char_u *prefix,
int empty,
int *first)
{
hashitem_T *hi;
dictitem_T *di;
int todo;
todo = (int)ht->ht_used;
for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
--todo;
di = HI2DI(hi);
if (empty || di->di_tv.v_type != VAR_STRING
|| di->di_tv.vval.v_string != NULL)
list_one_var(di, prefix, first);
}
}
}
/*
* List global variables.
*/
static void
list_glob_vars(int *first)
{
list_hashtable_vars(&globvarht, (char_u *)"", TRUE, first);
}
/*
* List buffer variables.
*/
static void
list_buf_vars(int *first)
{
char_u numbuf[NUMBUFLEN];
list_hashtable_vars(&curbuf->b_vars->dv_hashtab, (char_u *)"b:",
TRUE, first);
sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER,
numbuf, first);
}
/*
* List window variables.
*/
static void
list_win_vars(int *first)
{
list_hashtable_vars(&curwin->w_vars->dv_hashtab,
(char_u *)"w:", TRUE, first);
}
#ifdef FEAT_WINDOWS
/*
* List tab page variables.
*/
static void
list_tab_vars(int *first)
{
list_hashtable_vars(&curtab->tp_vars->dv_hashtab,
(char_u *)"t:", TRUE, first);
}
#endif
/*
* List Vim variables.
*/
static void
list_vim_vars(int *first)
{
list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE, first);
}
/*
* List script-local variables, if there is a script.
*/
static void
list_script_vars(int *first)
{
if (current_SID > 0 && current_SID <= ga_scripts.ga_len)
list_hashtable_vars(&SCRIPT_VARS(current_SID),
(char_u *)"s:", FALSE, first);
}
/*
* List variables in "arg".
*/
static char_u *
list_arg_vars(exarg_T *eap, char_u *arg, int *first)
{
int error = FALSE;
int len;
char_u *name;
char_u *name_start;
char_u *arg_subsc;
char_u *tofree;
typval_T tv;
while (!ends_excmd(*arg) && !got_int)
{
if (error || eap->skip)
{
arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
if (!vim_iswhite(*arg) && !ends_excmd(*arg))
{
emsg_severe = TRUE;
EMSG(_(e_trailing));
break;
}
}
else
{
/* get_name_len() takes care of expanding curly braces */
name_start = name = arg;
len = get_name_len(&arg, &tofree, TRUE, TRUE);
if (len <= 0)
{
/* This is mainly to keep test 49 working: when expanding
* curly braces fails overrule the exception error message. */
if (len < 0 && !aborting())
{
emsg_severe = TRUE;
EMSG2(_(e_invarg2), arg);
break;
}
error = TRUE;
}
else
{
if (tofree != NULL)
name = tofree;
if (get_var_tv(name, len, &tv, NULL, TRUE, FALSE) == FAIL)
error = TRUE;
else
{
/* handle d.key, l[idx], f(expr) */
arg_subsc = arg;
if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
error = TRUE;
else
{
if (arg == arg_subsc && len == 2 && name[1] == ':')
{
switch (*name)
{
case 'g': list_glob_vars(first); break;
case 'b': list_buf_vars(first); break;
case 'w': list_win_vars(first); break;
#ifdef FEAT_WINDOWS
case 't': list_tab_vars(first); break;
#endif
case 'v': list_vim_vars(first); break;
case 's': list_script_vars(first); break;
case 'l': list_func_vars(first); break;
default:
EMSG2(_("E738: Can't list variables for %s"), name);
}
}
else
{
char_u numbuf[NUMBUFLEN];
char_u *tf;
int c;
char_u *s;
s = echo_string(&tv, &tf, numbuf, 0);
c = *arg;
*arg = NUL;
list_one_var_a((char_u *)"",
arg == arg_subsc ? name : name_start,
tv.v_type,
s == NULL ? (char_u *)"" : s,
first);
*arg = c;
vim_free(tf);
}
clear_tv(&tv);
}
}
}
vim_free(tofree);
}
arg = skipwhite(arg);
}
return arg;
}
/*
* Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
* Returns a pointer to the char just after the var name.
* Returns NULL if there is an error.
*/
static char_u *
ex_let_one(
char_u *arg, /* points to variable name */
typval_T *tv, /* value to assign to variable */
int copy, /* copy value from "tv" */
char_u *endchars, /* valid chars after variable name or NULL */
char_u *op) /* "+", "-", "." or NULL*/
{
int c1;
char_u *name;
char_u *p;
char_u *arg_end = NULL;
int len;
int opt_flags;
char_u *tofree = NULL;
/*
* ":let $VAR = expr": Set environment variable.
*/
if (*arg == '$')
{
/* Find the end of the name. */
++arg;
name = arg;
len = get_env_len(&arg);
if (len == 0)
EMSG2(_(e_invarg2), name - 1);
else
{
if (op != NULL && (*op == '+' || *op == '-'))
EMSG2(_(e_letwrong), op);
else if (endchars != NULL
&& vim_strchr(endchars, *skipwhite(arg)) == NULL)
EMSG(_(e_letunexp));
else if (!check_secure())
{
c1 = name[len];
name[len] = NUL;
p = get_tv_string_chk(tv);
if (p != NULL && op != NULL && *op == '.')
{
int mustfree = FALSE;
char_u *s = vim_getenv(name, &mustfree);
if (s != NULL)
{
p = tofree = concat_str(s, p);
if (mustfree)
vim_free(s);
}
}
if (p != NULL)
{
vim_setenv(name, p);
if (STRICMP(name, "HOME") == 0)
init_homedir();
else if (didset_vim && STRICMP(name, "VIM") == 0)
didset_vim = FALSE;
else if (didset_vimruntime
&& STRICMP(name, "VIMRUNTIME") == 0)
didset_vimruntime = FALSE;
arg_end = arg;
}
name[len] = c1;
vim_free(tofree);
}
}
}
/*
* ":let &option = expr": Set option value.
* ":let &l:option = expr": Set local option value.
* ":let &g:option = expr": Set global option value.
*/
else if (*arg == '&')
{
/* Find the end of the name. */
p = find_option_end(&arg, &opt_flags);
if (p == NULL || (endchars != NULL
&& vim_strchr(endchars, *skipwhite(p)) == NULL))
EMSG(_(e_letunexp));
else
{
long n;
int opt_type;
long numval;
char_u *stringval = NULL;
char_u *s;
c1 = *p;
*p = NUL;
n = (long)get_tv_number(tv);
s = get_tv_string_chk(tv); /* != NULL if number or string */
if (s != NULL && op != NULL && *op != '=')
{
opt_type = get_option_value(arg, &numval,
&stringval, opt_flags);
if ((opt_type == 1 && *op == '.')
|| (opt_type == 0 && *op != '.'))
EMSG2(_(e_letwrong), op);
else
{
if (opt_type == 1) /* number */
{
if (*op == '+')
n = numval + n;
else
n = numval - n;
}
else if (opt_type == 0 && stringval != NULL) /* string */
{
s = concat_str(stringval, s);
vim_free(stringval);
stringval = s;
}
}
}
if (s != NULL)
{
set_option_value(arg, n, s, opt_flags);
arg_end = p;
}
*p = c1;
vim_free(stringval);
}
}
/*
* ":let @r = expr": Set register contents.
*/
else if (*arg == '@')
{
++arg;
if (op != NULL && (*op == '+' || *op == '-'))
EMSG2(_(e_letwrong), op);
else if (endchars != NULL
&& vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
EMSG(_(e_letunexp));
else
{
char_u *ptofree = NULL;
char_u *s;
p = get_tv_string_chk(tv);
if (p != NULL && op != NULL && *op == '.')
{
s = get_reg_contents(*arg == '@' ? '"' : *arg, GREG_EXPR_SRC);
if (s != NULL)
{
p = ptofree = concat_str(s, p);
vim_free(s);
}
}
if (p != NULL)
{
write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
arg_end = arg + 1;
}
vim_free(ptofree);
}
}
/*
* ":let var = expr": Set internal variable.
* ":let {expr} = expr": Idem, name made with curly braces
*/
else if (eval_isnamec1(*arg) || *arg == '{')
{
lval_T lv;
p = get_lval(arg, tv, &lv, FALSE, FALSE, 0, FNE_CHECK_START);
if (p != NULL && lv.ll_name != NULL)
{
if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
EMSG(_(e_letunexp));
else
{
set_var_lval(&lv, p, tv, copy, op);
arg_end = p;
}
}
clear_lval(&lv);
}
else
EMSG2(_(e_invarg2), arg);
return arg_end;
}
/*
* If "arg" is equal to "b:changedtick" give an error and return TRUE.
*/
int
check_changedtick(char_u *arg)
{
if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
{
EMSG2(_(e_readonlyvar), arg);
return TRUE;
}
return FALSE;
}
/*
* Get an lval: variable, Dict item or List item that can be assigned a value
* to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
* "name.key", "name.key[expr]" etc.
* Indexing only works if "name" is an existing List or Dictionary.
* "name" points to the start of the name.
* If "rettv" is not NULL it points to the value to be assigned.
* "unlet" is TRUE for ":unlet": slightly different behavior when something is
* wrong; must end in space or cmd separator.
*
* flags:
* GLV_QUIET: do not give error messages
* GLV_NO_AUTOLOAD: do not use script autoloading
*
* Returns a pointer to just after the name, including indexes.
* When an evaluation error occurs "lp->ll_name" is NULL;
* Returns NULL for a parsing error. Still need to free items in "lp"!
*/
char_u *
get_lval(
char_u *name,
typval_T *rettv,
lval_T *lp,
int unlet,
int skip,
int flags, /* GLV_ values */
int fne_flags) /* flags for find_name_end() */
{
char_u *p;
char_u *expr_start, *expr_end;
int cc;
dictitem_T *v;
typval_T var1;
typval_T var2;
int empty1 = FALSE;
listitem_T *ni;
char_u *key = NULL;
int len;
hashtab_T *ht;
int quiet = flags & GLV_QUIET;
/* Clear everything in "lp". */
vim_memset(lp, 0, sizeof(lval_T));
if (skip)
{
/* When skipping just find the end of the name. */
lp->ll_name = name;
return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
}
/* Find the end of the name. */
p = find_name_end(name, &expr_start, &expr_end, fne_flags);
if (expr_start != NULL)
{
/* Don't expand the name when we already know there is an error. */
if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
&& *p != '[' && *p != '.')
{
EMSG(_(e_trailing));
return NULL;
}
lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
if (lp->ll_exp_name == NULL)
{
/* Report an invalid expression in braces, unless the
* expression evaluation has been cancelled due to an
* aborting error, an interrupt, or an exception. */
if (!aborting() && !quiet)
{
emsg_severe = TRUE;
EMSG2(_(e_invarg2), name);
return NULL;
}
}
lp->ll_name = lp->ll_exp_name;
}
else
lp->ll_name = name;
/* Without [idx] or .key we are done. */
if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
return p;
cc = *p;
*p = NUL;
v = find_var(lp->ll_name, &ht, flags & GLV_NO_AUTOLOAD);
if (v == NULL && !quiet)
EMSG2(_(e_undefvar), lp->ll_name);
*p = cc;
if (v == NULL)
return NULL;
/*
* Loop until no more [idx] or .key is following.
*/
lp->ll_tv = &v->di_tv;
while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
{
if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
&& !(lp->ll_tv->v_type == VAR_DICT
&& lp->ll_tv->vval.v_dict != NULL))
{
if (!quiet)
EMSG(_("E689: Can only index a List or Dictionary"));
return NULL;
}
if (lp->ll_range)
{
if (!quiet)
EMSG(_("E708: [:] must come last"));
return NULL;
}
len = -1;
if (*p == '.')
{
key = p + 1;
for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
;
if (len == 0)
{
if (!quiet)
EMSG(_(e_emptykey));
return NULL;
}
p = key + len;
}
else
{
/* Get the index [expr] or the first index [expr: ]. */
p = skipwhite(p + 1);
if (*p == ':')
empty1 = TRUE;
else
{
empty1 = FALSE;
if (eval1(&p, &var1, TRUE) == FAIL) /* recursive! */
return NULL;
if (get_tv_string_chk(&var1) == NULL)
{
/* not a number or string */
clear_tv(&var1);
return NULL;
}
}
/* Optionally get the second index [ :expr]. */
if (*p == ':')
{
if (lp->ll_tv->v_type == VAR_DICT)
{
if (!quiet)
EMSG(_(e_dictrange));
if (!empty1)
clear_tv(&var1);
return NULL;
}
if (rettv != NULL && (rettv->v_type != VAR_LIST
|| rettv->vval.v_list == NULL))
{
if (!quiet)
EMSG(_("E709: [:] requires a List value"));
if (!empty1)
clear_tv(&var1);
return NULL;
}
p = skipwhite(p + 1);
if (*p == ']')
lp->ll_empty2 = TRUE;
else
{
lp->ll_empty2 = FALSE;
if (eval1(&p, &var2, TRUE) == FAIL) /* recursive! */
{
if (!empty1)
clear_tv(&var1);
return NULL;
}
if (get_tv_string_chk(&var2) == NULL)
{
/* not a number or string */
if (!empty1)
clear_tv(&var1);
clear_tv(&var2);
return NULL;
}
}
lp->ll_range = TRUE;
}
else
lp->ll_range = FALSE;
if (*p != ']')
{
if (!quiet)
EMSG(_(e_missbrac));
if (!empty1)
clear_tv(&var1);
if (lp->ll_range && !lp->ll_empty2)
clear_tv(&var2);
return NULL;
}
/* Skip to past ']'. */
++p;
}
if (lp->ll_tv->v_type == VAR_DICT)
{
if (len == -1)
{
/* "[key]": get key from "var1" */
key = get_tv_string_chk(&var1); /* is number or string */
if (key == NULL)
{
clear_tv(&var1);
return NULL;
}
}
lp->ll_list = NULL;
lp->ll_dict = lp->ll_tv->vval.v_dict;
lp->ll_di = dict_find(lp->ll_dict, key, len);
/* When assigning to a scope dictionary check that a function and
* variable name is valid (only variable name unless it is l: or
* g: dictionary). Disallow overwriting a builtin function. */
if (rettv != NULL && lp->ll_dict->dv_scope != 0)
{
int prevval;
int wrong;
if (len != -1)
{
prevval = key[len];
key[len] = NUL;
}
else
prevval = 0; /* avoid compiler warning */
wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE
&& rettv->v_type == VAR_FUNC
&& var_check_func_name(key, lp->ll_di == NULL))
|| !valid_varname(key);
if (len != -1)
key[len] = prevval;
if (wrong)
return NULL;
}
if (lp->ll_di == NULL)
{
/* Can't add "v:" variable. */
if (lp->ll_dict == &vimvardict)
{
EMSG2(_(e_illvar), name);
return NULL;
}
/* Key does not exist in dict: may need to add it. */
if (*p == '[' || *p == '.' || unlet)
{
if (!quiet)
EMSG2(_(e_dictkey), key);
if (len == -1)
clear_tv(&var1);
return NULL;
}
if (len == -1)
lp->ll_newkey = vim_strsave(key);
else
lp->ll_newkey = vim_strnsave(key, len);
if (len == -1)
clear_tv(&var1);
if (lp->ll_newkey == NULL)
p = NULL;
break;
}
/* existing variable, need to check if it can be changed */
else if (var_check_ro(lp->ll_di->di_flags, name, FALSE))
return NULL;
if (len == -1)
clear_tv(&var1);
lp->ll_tv = &lp->ll_di->di_tv;
}
else
{
/*
* Get the number and item for the only or first index of the List.
*/
if (empty1)
lp->ll_n1 = 0;
else
{
lp->ll_n1 = (long)get_tv_number(&var1);
/* is number or string */
clear_tv(&var1);
}
lp->ll_dict = NULL;
lp->ll_list = lp->ll_tv->vval.v_list;
lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
if (lp->ll_li == NULL)
{
if (lp->ll_n1 < 0)
{
lp->ll_n1 = 0;
lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
}
}
if (lp->ll_li == NULL)
{
if (lp->ll_range && !lp->ll_empty2)
clear_tv(&var2);
if (!quiet)
EMSGN(_(e_listidx), lp->ll_n1);
return NULL;
}
/*
* May need to find the item or absolute index for the second
* index of a range.
* When no index given: "lp->ll_empty2" is TRUE.
* Otherwise "lp->ll_n2" is set to the second index.
*/
if (lp->ll_range && !lp->ll_empty2)
{
lp->ll_n2 = (long)get_tv_number(&var2);
/* is number or string */
clear_tv(&var2);
if (lp->ll_n2 < 0)
{
ni = list_find(lp->ll_list, lp->ll_n2);
if (ni == NULL)
{
if (!quiet)
EMSGN(_(e_listidx), lp->ll_n2);
return NULL;
}
lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
}
/* Check that lp->ll_n2 isn't before lp->ll_n1. */
if (lp->ll_n1 < 0)
lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
if (lp->ll_n2 < lp->ll_n1)
{
if (!quiet)
EMSGN(_(e_listidx), lp->ll_n2);
return NULL;
}
}
lp->ll_tv = &lp->ll_li->li_tv;
}
}
return p;
}
/*
* Clear lval "lp" that was filled by get_lval().
*/
void
clear_lval(lval_T *lp)
{
vim_free(lp->ll_exp_name);
vim_free(lp->ll_newkey);
}
/*
* Set a variable that was parsed by get_lval() to "rettv".
* "endp" points to just after the parsed name.
* "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
*/
static void
set_var_lval(
lval_T *lp,
char_u *endp,
typval_T *rettv,
int copy,
char_u *op)
{
int cc;
listitem_T *ri;
dictitem_T *di;
if (lp->ll_tv == NULL)
{
if (!check_changedtick(lp->ll_name))
{
cc = *endp;
*endp = NUL;
if (op != NULL && *op != '=')
{
typval_T tv;
/* handle +=, -= and .= */
di = NULL;
if (get_var_tv(lp->ll_name, (int)STRLEN(lp->ll_name),
&tv, &di, TRUE, FALSE) == OK)
{
if ((di == NULL
|| (!var_check_ro(di->di_flags, lp->ll_name, FALSE)
&& !tv_check_lock(di->di_tv.v_lock, lp->ll_name,
FALSE)))
&& tv_op(&tv, rettv, op) == OK)
set_var(lp->ll_name, &tv, FALSE);
clear_tv(&tv);
}
}
else
set_var(lp->ll_name, rettv, copy);
*endp = cc;
}
}
else if (tv_check_lock(lp->ll_newkey == NULL
? lp->ll_tv->v_lock
: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name, FALSE))
;
else if (lp->ll_range)
{
listitem_T *ll_li = lp->ll_li;
int ll_n1 = lp->ll_n1;
/*
* Check whether any of the list items is locked
*/
for (ri = rettv->vval.v_list->lv_first; ri != NULL && ll_li != NULL; )
{
if (tv_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE))
return;
ri = ri->li_next;
if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == ll_n1))
break;
ll_li = ll_li->li_next;
++ll_n1;
}
/*
* Assign the List values to the list items.
*/
for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
{
if (op != NULL && *op != '=')
tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
else
{
clear_tv(&lp->ll_li->li_tv);
copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
}
ri = ri->li_next;
if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
break;
if (lp->ll_li->li_next == NULL)
{
/* Need to add an empty item. */
if (list_append_number(lp->ll_list, 0) == FAIL)
{
ri = NULL;
break;
}
}
lp->ll_li = lp->ll_li->li_next;
++lp->ll_n1;
}
if (ri != NULL)
EMSG(_("E710: List value has more items than target"));
else if (lp->ll_empty2
? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
: lp->ll_n1 != lp->ll_n2)
EMSG(_("E711: List value has not enough items"));
}
else
{
/*
* Assign to a List or Dictionary item.
*/
if (lp->ll_newkey != NULL)
{
if (op != NULL && *op != '=')
{
EMSG2(_(e_letwrong), op);
return;
}
/* Need to add an item to the Dictionary. */
di = dictitem_alloc(lp->ll_newkey);
if (di == NULL)
return;
if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
{
vim_free(di);
return;
}
lp->ll_tv = &di->di_tv;
}
else if (op != NULL && *op != '=')
{
tv_op(lp->ll_tv, rettv, op);
return;
}
else
clear_tv(lp->ll_tv);
/*
* Assign the value to the variable or list item.
*/
if (copy)
copy_tv(rettv, lp->ll_tv);
else
{
*lp->ll_tv = *rettv;
lp->ll_tv->v_lock = 0;
init_tv(rettv);
}
}
}
/*
* Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
* Returns OK or FAIL.
*/
static int
tv_op(typval_T *tv1, typval_T *tv2, char_u *op)
{
varnumber_T n;
char_u numbuf[NUMBUFLEN];
char_u *s;
/* Can't do anything with a Funcref, Dict, v:true on the right. */
if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT
&& tv2->v_type != VAR_SPECIAL)
{
switch (tv1->v_type)
{
case VAR_UNKNOWN:
case VAR_DICT:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
break;
case VAR_LIST:
if (*op != '+' || tv2->v_type != VAR_LIST)
break;
/* List += List */
if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
return OK;
case VAR_NUMBER:
case VAR_STRING:
if (tv2->v_type == VAR_LIST)
break;
if (*op == '+' || *op == '-')
{
/* nr += nr or nr -= nr*/
n = get_tv_number(tv1);
#ifdef FEAT_FLOAT
if (tv2->v_type == VAR_FLOAT)
{
float_T f = n;
if (*op == '+')
f += tv2->vval.v_float;
else
f -= tv2->vval.v_float;
clear_tv(tv1);
tv1->v_type = VAR_FLOAT;
tv1->vval.v_float = f;
}
else
#endif
{
if (*op == '+')
n += get_tv_number(tv2);
else
n -= get_tv_number(tv2);
clear_tv(tv1);
tv1->v_type = VAR_NUMBER;
tv1->vval.v_number = n;
}
}
else
{
if (tv2->v_type == VAR_FLOAT)
break;
/* str .= str */
s = get_tv_string(tv1);
s = concat_str(s, get_tv_string_buf(tv2, numbuf));
clear_tv(tv1);
tv1->v_type = VAR_STRING;
tv1->vval.v_string = s;
}
return OK;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
{
float_T f;
if (*op == '.' || (tv2->v_type != VAR_FLOAT
&& tv2->v_type != VAR_NUMBER
&& tv2->v_type != VAR_STRING))
break;
if (tv2->v_type == VAR_FLOAT)
f = tv2->vval.v_float;
else
f = get_tv_number(tv2);
if (*op == '+')
tv1->vval.v_float += f;
else
tv1->vval.v_float -= f;
}
#endif
return OK;
}
}
EMSG2(_(e_letwrong), op);
return FAIL;
}
/*
* Evaluate the expression used in a ":for var in expr" command.
* "arg" points to "var".
* Set "*errp" to TRUE for an error, FALSE otherwise;
* Return a pointer that holds the info. Null when there is an error.
*/
void *
eval_for_line(
char_u *arg,
int *errp,
char_u **nextcmdp,
int skip)
{
forinfo_T *fi;
char_u *expr;
typval_T tv;
list_T *l;
*errp = TRUE; /* default: there is an error */
fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
if (fi == NULL)
return NULL;
expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
if (expr == NULL)
return fi;
expr = skipwhite(expr);
if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
{
EMSG(_("E690: Missing \"in\" after :for"));
return fi;
}
if (skip)
++emsg_skip;
if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
{
*errp = FALSE;
if (!skip)
{
l = tv.vval.v_list;
if (tv.v_type != VAR_LIST)
{
EMSG(_(e_listreq));
clear_tv(&tv);
}
else if (l == NULL)
{
/* a null list is like an empty list: do nothing */
clear_tv(&tv);
}
else
{
/* No need to increment the refcount, it's already set for the
* list being used in "tv". */
fi->fi_list = l;
list_add_watch(l, &fi->fi_lw);
fi->fi_lw.lw_item = l->lv_first;
}
}
}
if (skip)
--emsg_skip;
return fi;
}
/*
* Use the first item in a ":for" list. Advance to the next.
* Assign the values to the variable (list). "arg" points to the first one.
* Return TRUE when a valid item was found, FALSE when at end of list or
* something wrong.
*/
int
next_for_item(void *fi_void, char_u *arg)
{
forinfo_T *fi = (forinfo_T *)fi_void;
int result;
listitem_T *item;
item = fi->fi_lw.lw_item;
if (item == NULL)
result = FALSE;
else
{
fi->fi_lw.lw_item = item->li_next;
result = (ex_let_vars(arg, &item->li_tv, TRUE,
fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
}
return result;
}
/*
* Free the structure used to store info used by ":for".
*/
void
free_for_info(void *fi_void)
{
forinfo_T *fi = (forinfo_T *)fi_void;
if (fi != NULL && fi->fi_list != NULL)
{
list_rem_watch(fi->fi_list, &fi->fi_lw);
list_unref(fi->fi_list);
}
vim_free(fi);
}
#if defined(FEAT_CMDL_COMPL) || defined(PROTO)
void
set_context_for_expression(
expand_T *xp,
char_u *arg,
cmdidx_T cmdidx)
{
int got_eq = FALSE;
int c;
char_u *p;
if (cmdidx == CMD_let)
{
xp->xp_context = EXPAND_USER_VARS;
if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
{
/* ":let var1 var2 ...": find last space. */
for (p = arg + STRLEN(arg); p >= arg; )
{
xp->xp_pattern = p;
mb_ptr_back(arg, p);
if (vim_iswhite(*p))
break;
}
return;
}
}
else
xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
: EXPAND_EXPRESSION;
while ((xp->xp_pattern = vim_strpbrk(arg,
(char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
{
c = *xp->xp_pattern;
if (c == '&')
{
c = xp->xp_pattern[1];
if (c == '&')
{
++xp->xp_pattern;
xp->xp_context = cmdidx != CMD_let || got_eq
? EXPAND_EXPRESSION : EXPAND_NOTHING;
}
else if (c != ' ')
{
xp->xp_context = EXPAND_SETTINGS;
if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
xp->xp_pattern += 2;
}
}
else if (c == '$')
{
/* environment variable */
xp->xp_context = EXPAND_ENV_VARS;
}
else if (c == '=')
{
got_eq = TRUE;
xp->xp_context = EXPAND_EXPRESSION;
}
else if (c == '#'
&& xp->xp_context == EXPAND_EXPRESSION)
{
/* Autoload function/variable contains '#'. */
break;
}
else if ((c == '<' || c == '#')
&& xp->xp_context == EXPAND_FUNCTIONS
&& vim_strchr(xp->xp_pattern, '(') == NULL)
{
/* Function name can start with "<SNR>" and contain '#'. */
break;
}
else if (cmdidx != CMD_let || got_eq)
{
if (c == '"') /* string */
{
while ((c = *++xp->xp_pattern) != NUL && c != '"')
if (c == '\\' && xp->xp_pattern[1] != NUL)
++xp->xp_pattern;
xp->xp_context = EXPAND_NOTHING;
}
else if (c == '\'') /* literal string */
{
/* Trick: '' is like stopping and starting a literal string. */
while ((c = *++xp->xp_pattern) != NUL && c != '\'')
/* skip */ ;
xp->xp_context = EXPAND_NOTHING;
}
else if (c == '|')
{
if (xp->xp_pattern[1] == '|')
{
++xp->xp_pattern;
xp->xp_context = EXPAND_EXPRESSION;
}
else
xp->xp_context = EXPAND_COMMANDS;
}
else
xp->xp_context = EXPAND_EXPRESSION;
}
else
/* Doesn't look like something valid, expand as an expression
* anyway. */
xp->xp_context = EXPAND_EXPRESSION;
arg = xp->xp_pattern;
if (*arg != NUL)
while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
/* skip */ ;
}
xp->xp_pattern = arg;
}
#endif /* FEAT_CMDL_COMPL */
/*
* ":unlet[!] var1 ... " command.
*/
void
ex_unlet(exarg_T *eap)
{
ex_unletlock(eap, eap->arg, 0);
}
/*
* ":lockvar" and ":unlockvar" commands
*/
void
ex_lockvar(exarg_T *eap)
{
char_u *arg = eap->arg;
int deep = 2;
if (eap->forceit)
deep = -1;
else if (vim_isdigit(*arg))
{
deep = getdigits(&arg);
arg = skipwhite(arg);
}
ex_unletlock(eap, arg, deep);
}
/*
* ":unlet", ":lockvar" and ":unlockvar" are quite similar.
*/
static void
ex_unletlock(
exarg_T *eap,
char_u *argstart,
int deep)
{
char_u *arg = argstart;
char_u *name_end;
int error = FALSE;
lval_T lv;
do
{
/* Parse the name and find the end. */
name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, 0,
FNE_CHECK_START);
if (lv.ll_name == NULL)
error = TRUE; /* error but continue parsing */
if (name_end == NULL || (!vim_iswhite(*name_end)
&& !ends_excmd(*name_end)))
{
if (name_end != NULL)
{
emsg_severe = TRUE;
EMSG(_(e_trailing));
}
if (!(eap->skip || error))
clear_lval(&lv);
break;
}
if (!error && !eap->skip)
{
if (eap->cmdidx == CMD_unlet)
{
if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
error = TRUE;
}
else
{
if (do_lock_var(&lv, name_end, deep,
eap->cmdidx == CMD_lockvar) == FAIL)
error = TRUE;
}
}
if (!eap->skip)
clear_lval(&lv);
arg = skipwhite(name_end);
} while (!ends_excmd(*arg));
eap->nextcmd = check_nextcmd(arg);
}
static int
do_unlet_var(
lval_T *lp,
char_u *name_end,
int forceit)
{
int ret = OK;
int cc;
if (lp->ll_tv == NULL)
{
cc = *name_end;
*name_end = NUL;
/* Normal name or expanded name. */
if (check_changedtick(lp->ll_name))
ret = FAIL;
else if (do_unlet(lp->ll_name, forceit) == FAIL)
ret = FAIL;
*name_end = cc;
}
else if ((lp->ll_list != NULL
&& tv_check_lock(lp->ll_list->lv_lock, lp->ll_name, FALSE))
|| (lp->ll_dict != NULL
&& tv_check_lock(lp->ll_dict->dv_lock, lp->ll_name, FALSE)))
return FAIL;
else if (lp->ll_range)
{
listitem_T *li;
listitem_T *ll_li = lp->ll_li;
int ll_n1 = lp->ll_n1;
while (ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= ll_n1))
{
li = ll_li->li_next;
if (tv_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE))
return FAIL;
ll_li = li;
++ll_n1;
}
/* Delete a range of List items. */
while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
{
li = lp->ll_li->li_next;
listitem_remove(lp->ll_list, lp->ll_li);
lp->ll_li = li;
++lp->ll_n1;
}
}
else
{
if (lp->ll_list != NULL)
/* unlet a List item. */
listitem_remove(lp->ll_list, lp->ll_li);
else
/* unlet a Dictionary item. */
dictitem_remove(lp->ll_dict, lp->ll_di);
}
return ret;
}
/*
* "unlet" a variable. Return OK if it existed, FAIL if not.
* When "forceit" is TRUE don't complain if the variable doesn't exist.
*/
int
do_unlet(char_u *name, int forceit)
{
hashtab_T *ht;
hashitem_T *hi;
char_u *varname;
dict_T *d;
dictitem_T *di;
ht = find_var_ht(name, &varname);
if (ht != NULL && *varname != NUL)
{
d = get_current_funccal_dict(ht);
if (d == NULL)
{
if (ht == &globvarht)
d = &globvardict;
else if (ht == &compat_hashtab)
d = &vimvardict;
else
{
di = find_var_in_ht(ht, *name, (char_u *)"", FALSE);
d = di == NULL ? NULL : di->di_tv.vval.v_dict;
}
if (d == NULL)
{
EMSG2(_(e_intern2), "do_unlet()");
return FAIL;
}
}
hi = hash_find(ht, varname);
if (HASHITEM_EMPTY(hi))
hi = find_hi_in_scoped_ht(name, &ht);
if (hi != NULL && !HASHITEM_EMPTY(hi))
{
di = HI2DI(hi);
if (var_check_fixed(di->di_flags, name, FALSE)
|| var_check_ro(di->di_flags, name, FALSE)
|| tv_check_lock(d->dv_lock, name, FALSE))
return FAIL;
delete_var(ht, hi);
return OK;
}
}
if (forceit)
return OK;
EMSG2(_("E108: No such variable: \"%s\""), name);
return FAIL;
}
/*
* Lock or unlock variable indicated by "lp".
* "deep" is the levels to go (-1 for unlimited);
* "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
*/
static int
do_lock_var(
lval_T *lp,
char_u *name_end,
int deep,
int lock)
{
int ret = OK;
int cc;
dictitem_T *di;
if (deep == 0) /* nothing to do */
return OK;
if (lp->ll_tv == NULL)
{
cc = *name_end;
*name_end = NUL;
/* Normal name or expanded name. */
if (check_changedtick(lp->ll_name))
ret = FAIL;
else
{
di = find_var(lp->ll_name, NULL, TRUE);
if (di == NULL)
ret = FAIL;
else
{
if (lock)
di->di_flags |= DI_FLAGS_LOCK;
else
di->di_flags &= ~DI_FLAGS_LOCK;
item_lock(&di->di_tv, deep, lock);
}
}
*name_end = cc;
}
else if (lp->ll_range)
{
listitem_T *li = lp->ll_li;
/* (un)lock a range of List items. */
while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
{
item_lock(&li->li_tv, deep, lock);
li = li->li_next;
++lp->ll_n1;
}
}
else if (lp->ll_list != NULL)
/* (un)lock a List item. */
item_lock(&lp->ll_li->li_tv, deep, lock);
else
/* (un)lock a Dictionary item. */
item_lock(&lp->ll_di->di_tv, deep, lock);
return ret;
}
/*
* Lock or unlock an item. "deep" is nr of levels to go.
*/
static void
item_lock(typval_T *tv, int deep, int lock)
{
static int recurse = 0;
list_T *l;
listitem_T *li;
dict_T *d;
hashitem_T *hi;
int todo;
if (recurse >= DICT_MAXNEST)
{
EMSG(_("E743: variable nested too deep for (un)lock"));
return;
}
if (deep == 0)
return;
++recurse;
/* lock/unlock the item itself */
if (lock)
tv->v_lock |= VAR_LOCKED;
else
tv->v_lock &= ~VAR_LOCKED;
switch (tv->v_type)
{
case VAR_UNKNOWN:
case VAR_NUMBER:
case VAR_STRING:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_FLOAT:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
break;
case VAR_LIST:
if ((l = tv->vval.v_list) != NULL)
{
if (lock)
l->lv_lock |= VAR_LOCKED;
else
l->lv_lock &= ~VAR_LOCKED;
if (deep < 0 || deep > 1)
/* recursive: lock/unlock the items the List contains */
for (li = l->lv_first; li != NULL; li = li->li_next)
item_lock(&li->li_tv, deep - 1, lock);
}
break;
case VAR_DICT:
if ((d = tv->vval.v_dict) != NULL)
{
if (lock)
d->dv_lock |= VAR_LOCKED;
else
d->dv_lock &= ~VAR_LOCKED;
if (deep < 0 || deep > 1)
{
/* recursive: lock/unlock the items the List contains */
todo = (int)d->dv_hashtab.ht_used;
for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
--todo;
item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
}
}
}
}
}
--recurse;
}
#if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
/*
* Delete all "menutrans_" variables.
*/
void
del_menutrans_vars(void)
{
hashitem_T *hi;
int todo;
hash_lock(&globvarht);
todo = (int)globvarht.ht_used;
for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
--todo;
if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
delete_var(&globvarht, hi);
}
}
hash_unlock(&globvarht);
}
#endif
#if defined(FEAT_CMDL_COMPL) || defined(PROTO)
/*
* Local string buffer for the next two functions to store a variable name
* with its prefix. Allocated in cat_prefix_varname(), freed later in
* get_user_var_name().
*/
static char_u *cat_prefix_varname(int prefix, char_u *name);
static char_u *varnamebuf = NULL;
static int varnamebuflen = 0;
/*
* Function to concatenate a prefix and a variable name.
*/
static char_u *
cat_prefix_varname(int prefix, char_u *name)
{
int len;
len = (int)STRLEN(name) + 3;
if (len > varnamebuflen)
{
vim_free(varnamebuf);
len += 10; /* some additional space */
varnamebuf = alloc(len);
if (varnamebuf == NULL)
{
varnamebuflen = 0;
return NULL;
}
varnamebuflen = len;
}
*varnamebuf = prefix;
varnamebuf[1] = ':';
STRCPY(varnamebuf + 2, name);
return varnamebuf;
}
/*
* Function given to ExpandGeneric() to obtain the list of user defined
* (global/buffer/window/built-in) variable names.
*/
char_u *
get_user_var_name(expand_T *xp, int idx)
{
static long_u gdone;
static long_u bdone;
static long_u wdone;
#ifdef FEAT_WINDOWS
static long_u tdone;
#endif
static int vidx;
static hashitem_T *hi;
hashtab_T *ht;
if (idx == 0)
{
gdone = bdone = wdone = vidx = 0;
#ifdef FEAT_WINDOWS
tdone = 0;
#endif
}
/* Global variables */
if (gdone < globvarht.ht_used)
{
if (gdone++ == 0)
hi = globvarht.ht_array;
else
++hi;
while (HASHITEM_EMPTY(hi))
++hi;
if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
return cat_prefix_varname('g', hi->hi_key);
return hi->hi_key;
}
/* b: variables */
ht = &curbuf->b_vars->dv_hashtab;
if (bdone < ht->ht_used)
{
if (bdone++ == 0)
hi = ht->ht_array;
else
++hi;
while (HASHITEM_EMPTY(hi))
++hi;
return cat_prefix_varname('b', hi->hi_key);
}
if (bdone == ht->ht_used)
{
++bdone;
return (char_u *)"b:changedtick";
}
/* w: variables */
ht = &curwin->w_vars->dv_hashtab;
if (wdone < ht->ht_used)
{
if (wdone++ == 0)
hi = ht->ht_array;
else
++hi;
while (HASHITEM_EMPTY(hi))
++hi;
return cat_prefix_varname('w', hi->hi_key);
}
#ifdef FEAT_WINDOWS
/* t: variables */
ht = &curtab->tp_vars->dv_hashtab;
if (tdone < ht->ht_used)
{
if (tdone++ == 0)
hi = ht->ht_array;
else
++hi;
while (HASHITEM_EMPTY(hi))
++hi;
return cat_prefix_varname('t', hi->hi_key);
}
#endif
/* v: variables */
if (vidx < VV_LEN)
return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
vim_free(varnamebuf);
varnamebuf = NULL;
varnamebuflen = 0;
return NULL;
}
#endif /* FEAT_CMDL_COMPL */
/*
* Return TRUE if "pat" matches "text".
* Does not use 'cpo' and always uses 'magic'.
*/
static int
pattern_match(char_u *pat, char_u *text, int ic)
{
int matches = FALSE;
char_u *save_cpo;
regmatch_T regmatch;
/* avoid 'l' flag in 'cpoptions' */
save_cpo = p_cpo;
p_cpo = (char_u *)"";
regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
if (regmatch.regprog != NULL)
{
regmatch.rm_ic = ic;
matches = vim_regexec_nl(&regmatch, text, (colnr_T)0);
vim_regfree(regmatch.regprog);
}
p_cpo = save_cpo;
return matches;
}
/*
* types for expressions.
*/
typedef enum
{
TYPE_UNKNOWN = 0
, TYPE_EQUAL /* == */
, TYPE_NEQUAL /* != */
, TYPE_GREATER /* > */
, TYPE_GEQUAL /* >= */
, TYPE_SMALLER /* < */
, TYPE_SEQUAL /* <= */
, TYPE_MATCH /* =~ */
, TYPE_NOMATCH /* !~ */
} exptype_T;
/*
* The "evaluate" argument: When FALSE, the argument is only parsed but not
* executed. The function may return OK, but the rettv will be of type
* VAR_UNKNOWN. The function still returns FAIL for a syntax error.
*/
/*
* Handle zero level expression.
* This calls eval1() and handles error message and nextcmd.
* Put the result in "rettv" when returning OK and "evaluate" is TRUE.
* Note: "rettv.v_lock" is not set.
* Return OK or FAIL.
*/
int
eval0(
char_u *arg,
typval_T *rettv,
char_u **nextcmd,
int evaluate)
{
int ret;
char_u *p;
p = skipwhite(arg);
ret = eval1(&p, rettv, evaluate);
if (ret == FAIL || !ends_excmd(*p))
{
if (ret != FAIL)
clear_tv(rettv);
/*
* Report the invalid expression unless the expression evaluation has
* been cancelled due to an aborting error, an interrupt, or an
* exception.
*/
if (!aborting())
EMSG2(_(e_invexpr2), arg);
ret = FAIL;
}
if (nextcmd != NULL)
*nextcmd = check_nextcmd(p);
return ret;
}
/*
* Handle top level expression:
* expr2 ? expr1 : expr1
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
*
* Note: "rettv.v_lock" is not set.
*
* Return OK or FAIL.
*/
int
eval1(char_u **arg, typval_T *rettv, int evaluate)
{
int result;
typval_T var2;
/*
* Get the first variable.
*/
if (eval2(arg, rettv, evaluate) == FAIL)
return FAIL;
if ((*arg)[0] == '?')
{
result = FALSE;
if (evaluate)
{
int error = FALSE;
if (get_tv_number_chk(rettv, &error) != 0)
result = TRUE;
clear_tv(rettv);
if (error)
return FAIL;
}
/*
* Get the second variable.
*/
*arg = skipwhite(*arg + 1);
if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
return FAIL;
/*
* Check for the ":".
*/
if ((*arg)[0] != ':')
{
EMSG(_("E109: Missing ':' after '?'"));
if (evaluate && result)
clear_tv(rettv);
return FAIL;
}
/*
* Get the third variable.
*/
*arg = skipwhite(*arg + 1);
if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
{
if (evaluate && result)
clear_tv(rettv);
return FAIL;
}
if (evaluate && !result)
*rettv = var2;
}
return OK;
}
/*
* Handle first level expression:
* expr2 || expr2 || expr2 logical OR
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval2(char_u **arg, typval_T *rettv, int evaluate)
{
typval_T var2;
long result;
int first;
int error = FALSE;
/*
* Get the first variable.
*/
if (eval3(arg, rettv, evaluate) == FAIL)
return FAIL;
/*
* Repeat until there is no following "||".
*/
first = TRUE;
result = FALSE;
while ((*arg)[0] == '|' && (*arg)[1] == '|')
{
if (evaluate && first)
{
if (get_tv_number_chk(rettv, &error) != 0)
result = TRUE;
clear_tv(rettv);
if (error)
return FAIL;
first = FALSE;
}
/*
* Get the second variable.
*/
*arg = skipwhite(*arg + 2);
if (eval3(arg, &var2, evaluate && !result) == FAIL)
return FAIL;
/*
* Compute the result.
*/
if (evaluate && !result)
{
if (get_tv_number_chk(&var2, &error) != 0)
result = TRUE;
clear_tv(&var2);
if (error)
return FAIL;
}
if (evaluate)
{
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = result;
}
}
return OK;
}
/*
* Handle second level expression:
* expr3 && expr3 && expr3 logical AND
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval3(char_u **arg, typval_T *rettv, int evaluate)
{
typval_T var2;
long result;
int first;
int error = FALSE;
/*
* Get the first variable.
*/
if (eval4(arg, rettv, evaluate) == FAIL)
return FAIL;
/*
* Repeat until there is no following "&&".
*/
first = TRUE;
result = TRUE;
while ((*arg)[0] == '&' && (*arg)[1] == '&')
{
if (evaluate && first)
{
if (get_tv_number_chk(rettv, &error) == 0)
result = FALSE;
clear_tv(rettv);
if (error)
return FAIL;
first = FALSE;
}
/*
* Get the second variable.
*/
*arg = skipwhite(*arg + 2);
if (eval4(arg, &var2, evaluate && result) == FAIL)
return FAIL;
/*
* Compute the result.
*/
if (evaluate && result)
{
if (get_tv_number_chk(&var2, &error) == 0)
result = FALSE;
clear_tv(&var2);
if (error)
return FAIL;
}
if (evaluate)
{
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = result;
}
}
return OK;
}
/*
* Handle third level expression:
* var1 == var2
* var1 =~ var2
* var1 != var2
* var1 !~ var2
* var1 > var2
* var1 >= var2
* var1 < var2
* var1 <= var2
* var1 is var2
* var1 isnot var2
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval4(char_u **arg, typval_T *rettv, int evaluate)
{
typval_T var2;
char_u *p;
int i;
exptype_T type = TYPE_UNKNOWN;
int type_is = FALSE; /* TRUE for "is" and "isnot" */
int len = 2;
varnumber_T n1, n2;
char_u *s1, *s2;
char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN];
int ic;
/*
* Get the first variable.
*/
if (eval5(arg, rettv, evaluate) == FAIL)
return FAIL;
p = *arg;
switch (p[0])
{
case '=': if (p[1] == '=')
type = TYPE_EQUAL;
else if (p[1] == '~')
type = TYPE_MATCH;
break;
case '!': if (p[1] == '=')
type = TYPE_NEQUAL;
else if (p[1] == '~')
type = TYPE_NOMATCH;
break;
case '>': if (p[1] != '=')
{
type = TYPE_GREATER;
len = 1;
}
else
type = TYPE_GEQUAL;
break;
case '<': if (p[1] != '=')
{
type = TYPE_SMALLER;
len = 1;
}
else
type = TYPE_SEQUAL;
break;
case 'i': if (p[1] == 's')
{
if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
len = 5;
i = p[len];
if (!isalnum(i) && i != '_')
{
type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
type_is = TRUE;
}
}
break;
}
/*
* If there is a comparative operator, use it.
*/
if (type != TYPE_UNKNOWN)
{
/* extra question mark appended: ignore case */
if (p[len] == '?')
{
ic = TRUE;
++len;
}
/* extra '#' appended: match case */
else if (p[len] == '#')
{
ic = FALSE;
++len;
}
/* nothing appended: use 'ignorecase' */
else
ic = p_ic;
/*
* Get the second variable.
*/
*arg = skipwhite(p + len);
if (eval5(arg, &var2, evaluate) == FAIL)
{
clear_tv(rettv);
return FAIL;
}
if (evaluate)
{
if (type_is && rettv->v_type != var2.v_type)
{
/* For "is" a different type always means FALSE, for "notis"
* it means TRUE. */
n1 = (type == TYPE_NEQUAL);
}
else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
{
if (type_is)
{
n1 = (rettv->v_type == var2.v_type
&& rettv->vval.v_list == var2.vval.v_list);
if (type == TYPE_NEQUAL)
n1 = !n1;
}
else if (rettv->v_type != var2.v_type
|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
{
if (rettv->v_type != var2.v_type)
EMSG(_("E691: Can only compare List with List"));
else
EMSG(_("E692: Invalid operation for List"));
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
else
{
/* Compare two Lists for being equal or unequal. */
n1 = list_equal(rettv->vval.v_list, var2.vval.v_list,
ic, FALSE);
if (type == TYPE_NEQUAL)
n1 = !n1;
}
}
else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
{
if (type_is)
{
n1 = (rettv->v_type == var2.v_type
&& rettv->vval.v_dict == var2.vval.v_dict);
if (type == TYPE_NEQUAL)
n1 = !n1;
}
else if (rettv->v_type != var2.v_type
|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
{
if (rettv->v_type != var2.v_type)
EMSG(_("E735: Can only compare Dictionary with Dictionary"));
else
EMSG(_("E736: Invalid operation for Dictionary"));
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
else
{
/* Compare two Dictionaries for being equal or unequal. */
n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict,
ic, FALSE);
if (type == TYPE_NEQUAL)
n1 = !n1;
}
}
else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC
|| rettv->v_type == VAR_PARTIAL || var2.v_type == VAR_PARTIAL)
{
if (type != TYPE_EQUAL && type != TYPE_NEQUAL)
{
EMSG(_("E694: Invalid operation for Funcrefs"));
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
if ((rettv->v_type == VAR_PARTIAL
&& rettv->vval.v_partial == NULL)
|| (var2.v_type == VAR_PARTIAL
&& var2.vval.v_partial == NULL))
/* when a partial is NULL assume not equal */
n1 = FALSE;
else if (type_is)
{
if (rettv->v_type == VAR_FUNC && var2.v_type == VAR_FUNC)
/* strings are considered the same if their value is
* the same */
n1 = tv_equal(rettv, &var2, ic, FALSE);
else if (rettv->v_type == VAR_PARTIAL
&& var2.v_type == VAR_PARTIAL)
n1 = (rettv->vval.v_partial == var2.vval.v_partial);
else
n1 = FALSE;
}
else
n1 = tv_equal(rettv, &var2, ic, FALSE);
if (type == TYPE_NEQUAL)
n1 = !n1;
}
#ifdef FEAT_FLOAT
/*
* If one of the two variables is a float, compare as a float.
* When using "=~" or "!~", always compare as string.
*/
else if ((rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT)
&& type != TYPE_MATCH && type != TYPE_NOMATCH)
{
float_T f1, f2;
if (rettv->v_type == VAR_FLOAT)
f1 = rettv->vval.v_float;
else
f1 = get_tv_number(rettv);
if (var2.v_type == VAR_FLOAT)
f2 = var2.vval.v_float;
else
f2 = get_tv_number(&var2);
n1 = FALSE;
switch (type)
{
case TYPE_EQUAL: n1 = (f1 == f2); break;
case TYPE_NEQUAL: n1 = (f1 != f2); break;
case TYPE_GREATER: n1 = (f1 > f2); break;
case TYPE_GEQUAL: n1 = (f1 >= f2); break;
case TYPE_SMALLER: n1 = (f1 < f2); break;
case TYPE_SEQUAL: n1 = (f1 <= f2); break;
case TYPE_UNKNOWN:
case TYPE_MATCH:
case TYPE_NOMATCH: break; /* avoid gcc warning */
}
}
#endif
/*
* If one of the two variables is a number, compare as a number.
* When using "=~" or "!~", always compare as string.
*/
else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
&& type != TYPE_MATCH && type != TYPE_NOMATCH)
{
n1 = get_tv_number(rettv);
n2 = get_tv_number(&var2);
switch (type)
{
case TYPE_EQUAL: n1 = (n1 == n2); break;
case TYPE_NEQUAL: n1 = (n1 != n2); break;
case TYPE_GREATER: n1 = (n1 > n2); break;
case TYPE_GEQUAL: n1 = (n1 >= n2); break;
case TYPE_SMALLER: n1 = (n1 < n2); break;
case TYPE_SEQUAL: n1 = (n1 <= n2); break;
case TYPE_UNKNOWN:
case TYPE_MATCH:
case TYPE_NOMATCH: break; /* avoid gcc warning */
}
}
else
{
s1 = get_tv_string_buf(rettv, buf1);
s2 = get_tv_string_buf(&var2, buf2);
if (type != TYPE_MATCH && type != TYPE_NOMATCH)
i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
else
i = 0;
n1 = FALSE;
switch (type)
{
case TYPE_EQUAL: n1 = (i == 0); break;
case TYPE_NEQUAL: n1 = (i != 0); break;
case TYPE_GREATER: n1 = (i > 0); break;
case TYPE_GEQUAL: n1 = (i >= 0); break;
case TYPE_SMALLER: n1 = (i < 0); break;
case TYPE_SEQUAL: n1 = (i <= 0); break;
case TYPE_MATCH:
case TYPE_NOMATCH:
n1 = pattern_match(s2, s1, ic);
if (type == TYPE_NOMATCH)
n1 = !n1;
break;
case TYPE_UNKNOWN: break; /* avoid gcc warning */
}
}
clear_tv(rettv);
clear_tv(&var2);
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = n1;
}
}
return OK;
}
/*
* Handle fourth level expression:
* + number addition
* - number subtraction
* . string concatenation
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval5(char_u **arg, typval_T *rettv, int evaluate)
{
typval_T var2;
typval_T var3;
int op;
varnumber_T n1, n2;
#ifdef FEAT_FLOAT
float_T f1 = 0, f2 = 0;
#endif
char_u *s1, *s2;
char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN];
char_u *p;
/*
* Get the first variable.
*/
if (eval6(arg, rettv, evaluate, FALSE) == FAIL)
return FAIL;
/*
* Repeat computing, until no '+', '-' or '.' is following.
*/
for (;;)
{
op = **arg;
if (op != '+' && op != '-' && op != '.')
break;
if ((op != '+' || rettv->v_type != VAR_LIST)
#ifdef FEAT_FLOAT
&& (op == '.' || rettv->v_type != VAR_FLOAT)
#endif
)
{
/* For "list + ...", an illegal use of the first operand as
* a number cannot be determined before evaluating the 2nd
* operand: if this is also a list, all is ok.
* For "something . ...", "something - ..." or "non-list + ...",
* we know that the first operand needs to be a string or number
* without evaluating the 2nd operand. So check before to avoid
* side effects after an error. */
if (evaluate && get_tv_string_chk(rettv) == NULL)
{
clear_tv(rettv);
return FAIL;
}
}
/*
* Get the second variable.
*/
*arg = skipwhite(*arg + 1);
if (eval6(arg, &var2, evaluate, op == '.') == FAIL)
{
clear_tv(rettv);
return FAIL;
}
if (evaluate)
{
/*
* Compute the result.
*/
if (op == '.')
{
s1 = get_tv_string_buf(rettv, buf1); /* already checked */
s2 = get_tv_string_buf_chk(&var2, buf2);
if (s2 == NULL) /* type error ? */
{
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
p = concat_str(s1, s2);
clear_tv(rettv);
rettv->v_type = VAR_STRING;
rettv->vval.v_string = p;
}
else if (op == '+' && rettv->v_type == VAR_LIST
&& var2.v_type == VAR_LIST)
{
/* concatenate Lists */
if (list_concat(rettv->vval.v_list, var2.vval.v_list,
&var3) == FAIL)
{
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
clear_tv(rettv);
*rettv = var3;
}
else
{
int error = FALSE;
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
{
f1 = rettv->vval.v_float;
n1 = 0;
}
else
#endif
{
n1 = get_tv_number_chk(rettv, &error);
if (error)
{
/* This can only happen for "list + non-list". For
* "non-list + ..." or "something - ...", we returned
* before evaluating the 2nd operand. */
clear_tv(rettv);
return FAIL;
}
#ifdef FEAT_FLOAT
if (var2.v_type == VAR_FLOAT)
f1 = n1;
#endif
}
#ifdef FEAT_FLOAT
if (var2.v_type == VAR_FLOAT)
{
f2 = var2.vval.v_float;
n2 = 0;
}
else
#endif
{
n2 = get_tv_number_chk(&var2, &error);
if (error)
{
clear_tv(rettv);
clear_tv(&var2);
return FAIL;
}
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
f2 = n2;
#endif
}
clear_tv(rettv);
#ifdef FEAT_FLOAT
/* If there is a float on either side the result is a float. */
if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT)
{
if (op == '+')
f1 = f1 + f2;
else
f1 = f1 - f2;
rettv->v_type = VAR_FLOAT;
rettv->vval.v_float = f1;
}
else
#endif
{
if (op == '+')
n1 = n1 + n2;
else
n1 = n1 - n2;
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = n1;
}
}
clear_tv(&var2);
}
}
return OK;
}
/*
* Handle fifth level expression:
* * number multiplication
* / number division
* % number modulo
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval6(
char_u **arg,
typval_T *rettv,
int evaluate,
int want_string) /* after "." operator */
{
typval_T var2;
int op;
varnumber_T n1, n2;
#ifdef FEAT_FLOAT
int use_float = FALSE;
float_T f1 = 0, f2;
#endif
int error = FALSE;
/*
* Get the first variable.
*/
if (eval7(arg, rettv, evaluate, want_string) == FAIL)
return FAIL;
/*
* Repeat computing, until no '*', '/' or '%' is following.
*/
for (;;)
{
op = **arg;
if (op != '*' && op != '/' && op != '%')
break;
if (evaluate)
{
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
{
f1 = rettv->vval.v_float;
use_float = TRUE;
n1 = 0;
}
else
#endif
n1 = get_tv_number_chk(rettv, &error);
clear_tv(rettv);
if (error)
return FAIL;
}
else
n1 = 0;
/*
* Get the second variable.
*/
*arg = skipwhite(*arg + 1);
if (eval7(arg, &var2, evaluate, FALSE) == FAIL)
return FAIL;
if (evaluate)
{
#ifdef FEAT_FLOAT
if (var2.v_type == VAR_FLOAT)
{
if (!use_float)
{
f1 = n1;
use_float = TRUE;
}
f2 = var2.vval.v_float;
n2 = 0;
}
else
#endif
{
n2 = get_tv_number_chk(&var2, &error);
clear_tv(&var2);
if (error)
return FAIL;
#ifdef FEAT_FLOAT
if (use_float)
f2 = n2;
#endif
}
/*
* Compute the result.
* When either side is a float the result is a float.
*/
#ifdef FEAT_FLOAT
if (use_float)
{
if (op == '*')
f1 = f1 * f2;
else if (op == '/')
{
# ifdef VMS
/* VMS crashes on divide by zero, work around it */
if (f2 == 0.0)
{
if (f1 == 0)
f1 = -1 * __F_FLT_MAX - 1L; /* similar to NaN */
else if (f1 < 0)
f1 = -1 * __F_FLT_MAX;
else
f1 = __F_FLT_MAX;
}
else
f1 = f1 / f2;
# else
/* We rely on the floating point library to handle divide
* by zero to result in "inf" and not a crash. */
f1 = f1 / f2;
# endif
}
else
{
EMSG(_("E804: Cannot use '%' with Float"));
return FAIL;
}
rettv->v_type = VAR_FLOAT;
rettv->vval.v_float = f1;
}
else
#endif
{
if (op == '*')
n1 = n1 * n2;
else if (op == '/')
{
if (n2 == 0) /* give an error message? */
{
#ifdef FEAT_NUM64
if (n1 == 0)
n1 = -0x7fffffffffffffffLL - 1; /* similar to NaN */
else if (n1 < 0)
n1 = -0x7fffffffffffffffLL;
else
n1 = 0x7fffffffffffffffLL;
#else
if (n1 == 0)
n1 = -0x7fffffffL - 1L; /* similar to NaN */
else if (n1 < 0)
n1 = -0x7fffffffL;
else
n1 = 0x7fffffffL;
#endif
}
else
n1 = n1 / n2;
}
else
{
if (n2 == 0) /* give an error message? */
n1 = 0;
else
n1 = n1 % n2;
}
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = n1;
}
}
}
return OK;
}
/*
* Handle sixth level expression:
* number number constant
* "string" string constant
* 'string' literal string constant
* &option-name option value
* @r register contents
* identifier variable value
* function() function call
* $VAR environment variable
* (expression) nested expression
* [expr, expr] List
* {key: val, key: val} Dictionary
*
* Also handle:
* ! in front logical NOT
* - in front unary minus
* + in front unary plus (ignored)
* trailing [] subscript in String or List
* trailing .name entry in Dictionary
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
*
* Return OK or FAIL.
*/
static int
eval7(
char_u **arg,
typval_T *rettv,
int evaluate,
int want_string UNUSED) /* after "." operator */
{
varnumber_T n;
int len;
char_u *s;
char_u *start_leader, *end_leader;
int ret = OK;
char_u *alias;
/*
* Initialise variable so that clear_tv() can't mistake this for a
* string and free a string that isn't there.
*/
rettv->v_type = VAR_UNKNOWN;
/*
* Skip '!', '-' and '+' characters. They are handled later.
*/
start_leader = *arg;
while (**arg == '!' || **arg == '-' || **arg == '+')
*arg = skipwhite(*arg + 1);
end_leader = *arg;
switch (**arg)
{
/*
* Number constant.
*/
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
{
#ifdef FEAT_FLOAT
char_u *p = skipdigits(*arg + 1);
int get_float = FALSE;
/* We accept a float when the format matches
* "[0-9]\+\.[0-9]\+\([eE][+-]\?[0-9]\+\)\?". This is very
* strict to avoid backwards compatibility problems.
* Don't look for a float after the "." operator, so that
* ":let vers = 1.2.3" doesn't fail. */
if (!want_string && p[0] == '.' && vim_isdigit(p[1]))
{
get_float = TRUE;
p = skipdigits(p + 2);
if (*p == 'e' || *p == 'E')
{
++p;
if (*p == '-' || *p == '+')
++p;
if (!vim_isdigit(*p))
get_float = FALSE;
else
p = skipdigits(p + 1);
}
if (ASCII_ISALPHA(*p) || *p == '.')
get_float = FALSE;
}
if (get_float)
{
float_T f;
*arg += string2float(*arg, &f);
if (evaluate)
{
rettv->v_type = VAR_FLOAT;
rettv->vval.v_float = f;
}
}
else
#endif
{
vim_str2nr(*arg, NULL, &len, STR2NR_ALL, &n, NULL, 0);
*arg += len;
if (evaluate)
{
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = n;
}
}
break;
}
/*
* String constant: "string".
*/
case '"': ret = get_string_tv(arg, rettv, evaluate);
break;
/*
* Literal string constant: 'str''ing'.
*/
case '\'': ret = get_lit_string_tv(arg, rettv, evaluate);
break;
/*
* List: [expr, expr]
*/
case '[': ret = get_list_tv(arg, rettv, evaluate);
break;
/*
* Lambda: {arg, arg -> expr}
* Dictionary: {key: val, key: val}
*/
case '{': ret = get_lambda_tv(arg, rettv, evaluate);
if (ret == NOTDONE)
ret = get_dict_tv(arg, rettv, evaluate);
break;
/*
* Option value: &name
*/
case '&': ret = get_option_tv(arg, rettv, evaluate);
break;
/*
* Environment variable: $VAR.
*/
case '$': ret = get_env_tv(arg, rettv, evaluate);
break;
/*
* Register contents: @r.
*/
case '@': ++*arg;
if (evaluate)
{
rettv->v_type = VAR_STRING;
rettv->vval.v_string = get_reg_contents(**arg,
GREG_EXPR_SRC);
}
if (**arg != NUL)
++*arg;
break;
/*
* nested expression: (expression).
*/
case '(': *arg = skipwhite(*arg + 1);
ret = eval1(arg, rettv, evaluate); /* recursive! */
if (**arg == ')')
++*arg;
else if (ret == OK)
{
EMSG(_("E110: Missing ')'"));
clear_tv(rettv);
ret = FAIL;
}
break;
default: ret = NOTDONE;
break;
}
if (ret == NOTDONE)
{
/*
* Must be a variable or function name.
* Can also be a curly-braces kind of name: {expr}.
*/
s = *arg;
len = get_name_len(arg, &alias, evaluate, TRUE);
if (alias != NULL)
s = alias;
if (len <= 0)
ret = FAIL;
else
{
if (**arg == '(') /* recursive! */
{
partial_T *partial;
if (!evaluate)
check_vars(s, len);
/* If "s" is the name of a variable of type VAR_FUNC
* use its contents. */
s = deref_func_name(s, &len, &partial, !evaluate);
/* Invoke the function. */
ret = get_func_tv(s, len, rettv, arg,
curwin->w_cursor.lnum, curwin->w_cursor.lnum,
&len, evaluate, partial, NULL);
/* If evaluate is FALSE rettv->v_type was not set in
* get_func_tv, but it's needed in handle_subscript() to parse
* what follows. So set it here. */
if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(')
{
rettv->vval.v_string = NULL;
rettv->v_type = VAR_FUNC;
}
/* Stop the expression evaluation when immediately
* aborting on error, or when an interrupt occurred or
* an exception was thrown but not caught. */
if (aborting())
{
if (ret == OK)
clear_tv(rettv);
ret = FAIL;
}
}
else if (evaluate)
ret = get_var_tv(s, len, rettv, NULL, TRUE, FALSE);
else
{
check_vars(s, len);
ret = OK;
}
}
vim_free(alias);
}
*arg = skipwhite(*arg);
/* Handle following '[', '(' and '.' for expr[expr], expr.name,
* expr(expr). */
if (ret == OK)
ret = handle_subscript(arg, rettv, evaluate, TRUE);
/*
* Apply logical NOT and unary '-', from right to left, ignore '+'.
*/
if (ret == OK && evaluate && end_leader > start_leader)
{
int error = FALSE;
varnumber_T val = 0;
#ifdef FEAT_FLOAT
float_T f = 0.0;
if (rettv->v_type == VAR_FLOAT)
f = rettv->vval.v_float;
else
#endif
val = get_tv_number_chk(rettv, &error);
if (error)
{
clear_tv(rettv);
ret = FAIL;
}
else
{
while (end_leader > start_leader)
{
--end_leader;
if (*end_leader == '!')
{
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
f = !f;
else
#endif
val = !val;
}
else if (*end_leader == '-')
{
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
f = -f;
else
#endif
val = -val;
}
}
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
{
clear_tv(rettv);
rettv->vval.v_float = f;
}
else
#endif
{
clear_tv(rettv);
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = val;
}
}
}
return ret;
}
/*
* Evaluate an "[expr]" or "[expr:expr]" index. Also "dict.key".
* "*arg" points to the '[' or '.'.
* Returns FAIL or OK. "*arg" is advanced to after the ']'.
*/
static int
eval_index(
char_u **arg,
typval_T *rettv,
int evaluate,
int verbose) /* give error messages */
{
int empty1 = FALSE, empty2 = FALSE;
typval_T var1, var2;
long n1, n2 = 0;
long len = -1;
int range = FALSE;
char_u *s;
char_u *key = NULL;
switch (rettv->v_type)
{
case VAR_FUNC:
case VAR_PARTIAL:
if (verbose)
EMSG(_("E695: Cannot index a Funcref"));
return FAIL;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
if (verbose)
EMSG(_(e_float_as_string));
return FAIL;
#endif
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
if (verbose)
EMSG(_("E909: Cannot index a special variable"));
return FAIL;
case VAR_UNKNOWN:
if (evaluate)
return FAIL;
/* FALLTHROUGH */
case VAR_STRING:
case VAR_NUMBER:
case VAR_LIST:
case VAR_DICT:
break;
}
init_tv(&var1);
init_tv(&var2);
if (**arg == '.')
{
/*
* dict.name
*/
key = *arg + 1;
for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
;
if (len == 0)
return FAIL;
*arg = skipwhite(key + len);
}
else
{
/*
* something[idx]
*
* Get the (first) variable from inside the [].
*/
*arg = skipwhite(*arg + 1);
if (**arg == ':')
empty1 = TRUE;
else if (eval1(arg, &var1, evaluate) == FAIL) /* recursive! */
return FAIL;
else if (evaluate && get_tv_string_chk(&var1) == NULL)
{
/* not a number or string */
clear_tv(&var1);
return FAIL;
}
/*
* Get the second variable from inside the [:].
*/
if (**arg == ':')
{
range = TRUE;
*arg = skipwhite(*arg + 1);
if (**arg == ']')
empty2 = TRUE;
else if (eval1(arg, &var2, evaluate) == FAIL) /* recursive! */
{
if (!empty1)
clear_tv(&var1);
return FAIL;
}
else if (evaluate && get_tv_string_chk(&var2) == NULL)
{
/* not a number or string */
if (!empty1)
clear_tv(&var1);
clear_tv(&var2);
return FAIL;
}
}
/* Check for the ']'. */
if (**arg != ']')
{
if (verbose)
EMSG(_(e_missbrac));
clear_tv(&var1);
if (range)
clear_tv(&var2);
return FAIL;
}
*arg = skipwhite(*arg + 1); /* skip the ']' */
}
if (evaluate)
{
n1 = 0;
if (!empty1 && rettv->v_type != VAR_DICT)
{
n1 = get_tv_number(&var1);
clear_tv(&var1);
}
if (range)
{
if (empty2)
n2 = -1;
else
{
n2 = get_tv_number(&var2);
clear_tv(&var2);
}
}
switch (rettv->v_type)
{
case VAR_UNKNOWN:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_FLOAT:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
break; /* not evaluating, skipping over subscript */
case VAR_NUMBER:
case VAR_STRING:
s = get_tv_string(rettv);
len = (long)STRLEN(s);
if (range)
{
/* The resulting variable is a substring. If the indexes
* are out of range the result is empty. */
if (n1 < 0)
{
n1 = len + n1;
if (n1 < 0)
n1 = 0;
}
if (n2 < 0)
n2 = len + n2;
else if (n2 >= len)
n2 = len;
if (n1 >= len || n2 < 0 || n1 > n2)
s = NULL;
else
s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
}
else
{
/* The resulting variable is a string of a single
* character. If the index is too big or negative the
* result is empty. */
if (n1 >= len || n1 < 0)
s = NULL;
else
s = vim_strnsave(s + n1, 1);
}
clear_tv(rettv);
rettv->v_type = VAR_STRING;
rettv->vval.v_string = s;
break;
case VAR_LIST:
len = list_len(rettv->vval.v_list);
if (n1 < 0)
n1 = len + n1;
if (!empty1 && (n1 < 0 || n1 >= len))
{
/* For a range we allow invalid values and return an empty
* list. A list index out of range is an error. */
if (!range)
{
if (verbose)
EMSGN(_(e_listidx), n1);
return FAIL;
}
n1 = len;
}
if (range)
{
list_T *l;
listitem_T *item;
if (n2 < 0)
n2 = len + n2;
else if (n2 >= len)
n2 = len - 1;
if (!empty2 && (n2 < 0 || n2 + 1 < n1))
n2 = -1;
l = list_alloc();
if (l == NULL)
return FAIL;
for (item = list_find(rettv->vval.v_list, n1);
n1 <= n2; ++n1)
{
if (list_append_tv(l, &item->li_tv) == FAIL)
{
list_free(l);
return FAIL;
}
item = item->li_next;
}
clear_tv(rettv);
rettv->v_type = VAR_LIST;
rettv->vval.v_list = l;
++l->lv_refcount;
}
else
{
copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv, &var1);
clear_tv(rettv);
*rettv = var1;
}
break;
case VAR_DICT:
if (range)
{
if (verbose)
EMSG(_(e_dictrange));
if (len == -1)
clear_tv(&var1);
return FAIL;
}
{
dictitem_T *item;
if (len == -1)
{
key = get_tv_string_chk(&var1);
if (key == NULL)
{
clear_tv(&var1);
return FAIL;
}
}
item = dict_find(rettv->vval.v_dict, key, (int)len);
if (item == NULL && verbose)
EMSG2(_(e_dictkey), key);
if (len == -1)
clear_tv(&var1);
if (item == NULL)
return FAIL;
copy_tv(&item->di_tv, &var1);
clear_tv(rettv);
*rettv = var1;
}
break;
}
}
return OK;
}
/*
* Get an option value.
* "arg" points to the '&' or '+' before the option name.
* "arg" is advanced to character after the option name.
* Return OK or FAIL.
*/
int
get_option_tv(
char_u **arg,
typval_T *rettv, /* when NULL, only check if option exists */
int evaluate)
{
char_u *option_end;
long numval;
char_u *stringval;
int opt_type;
int c;
int working = (**arg == '+'); /* has("+option") */
int ret = OK;
int opt_flags;
/*
* Isolate the option name and find its value.
*/
option_end = find_option_end(arg, &opt_flags);
if (option_end == NULL)
{
if (rettv != NULL)
EMSG2(_("E112: Option name missing: %s"), *arg);
return FAIL;
}
if (!evaluate)
{
*arg = option_end;
return OK;
}
c = *option_end;
*option_end = NUL;
opt_type = get_option_value(*arg, &numval,
rettv == NULL ? NULL : &stringval, opt_flags);
if (opt_type == -3) /* invalid name */
{
if (rettv != NULL)
EMSG2(_("E113: Unknown option: %s"), *arg);
ret = FAIL;
}
else if (rettv != NULL)
{
if (opt_type == -2) /* hidden string option */
{
rettv->v_type = VAR_STRING;
rettv->vval.v_string = NULL;
}
else if (opt_type == -1) /* hidden number option */
{
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = 0;
}
else if (opt_type == 1) /* number option */
{
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = numval;
}
else /* string option */
{
rettv->v_type = VAR_STRING;
rettv->vval.v_string = stringval;
}
}
else if (working && (opt_type == -2 || opt_type == -1))
ret = FAIL;
*option_end = c; /* put back for error messages */
*arg = option_end;
return ret;
}
/*
* Allocate a variable for a string constant.
* Return OK or FAIL.
*/
static int
get_string_tv(char_u **arg, typval_T *rettv, int evaluate)
{
char_u *p;
char_u *name;
int extra = 0;
/*
* Find the end of the string, skipping backslashed characters.
*/
for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
{
if (*p == '\\' && p[1] != NUL)
{
++p;
/* A "\<x>" form occupies at least 4 characters, and produces up
* to 6 characters: reserve space for 2 extra */
if (*p == '<')
extra += 2;
}
}
if (*p != '"')
{
EMSG2(_("E114: Missing quote: %s"), *arg);
return FAIL;
}
/* If only parsing, set *arg and return here */
if (!evaluate)
{
*arg = p + 1;
return OK;
}
/*
* Copy the string into allocated memory, handling backslashed
* characters.
*/
name = alloc((unsigned)(p - *arg + extra));
if (name == NULL)
return FAIL;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = name;
for (p = *arg + 1; *p != NUL && *p != '"'; )
{
if (*p == '\\')
{
switch (*++p)
{
case 'b': *name++ = BS; ++p; break;
case 'e': *name++ = ESC; ++p; break;
case 'f': *name++ = FF; ++p; break;
case 'n': *name++ = NL; ++p; break;
case 'r': *name++ = CAR; ++p; break;
case 't': *name++ = TAB; ++p; break;
case 'X': /* hex: "\x1", "\x12" */
case 'x':
case 'u': /* Unicode: "\u0023" */
case 'U':
if (vim_isxdigit(p[1]))
{
int n, nr;
int c = toupper(*p);
if (c == 'X')
n = 2;
else if (*p == 'u')
n = 4;
else
n = 8;
nr = 0;
while (--n >= 0 && vim_isxdigit(p[1]))
{
++p;
nr = (nr << 4) + hex2nr(*p);
}
++p;
#ifdef FEAT_MBYTE
/* For "\u" store the number according to
* 'encoding'. */
if (c != 'X')
name += (*mb_char2bytes)(nr, name);
else
#endif
*name++ = nr;
}
break;
/* octal: "\1", "\12", "\123" */
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7': *name = *p++ - '0';
if (*p >= '0' && *p <= '7')
{
*name = (*name << 3) + *p++ - '0';
if (*p >= '0' && *p <= '7')
*name = (*name << 3) + *p++ - '0';
}
++name;
break;
/* Special key, e.g.: "\<C-W>" */
case '<': extra = trans_special(&p, name, TRUE, TRUE);
if (extra != 0)
{
name += extra;
break;
}
/* FALLTHROUGH */
default: MB_COPY_CHAR(p, name);
break;
}
}
else
MB_COPY_CHAR(p, name);
}
*name = NUL;
if (*p != NUL) /* just in case */
++p;
*arg = p;
return OK;
}
/*
* Allocate a variable for a 'str''ing' constant.
* Return OK or FAIL.
*/
static int
get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate)
{
char_u *p;
char_u *str;
int reduce = 0;
/*
* Find the end of the string, skipping ''.
*/
for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
{
if (*p == '\'')
{
if (p[1] != '\'')
break;
++reduce;
++p;
}
}
if (*p != '\'')
{
EMSG2(_("E115: Missing quote: %s"), *arg);
return FAIL;
}
/* If only parsing return after setting "*arg" */
if (!evaluate)
{
*arg = p + 1;
return OK;
}
/*
* Copy the string into allocated memory, handling '' to ' reduction.
*/
str = alloc((unsigned)((p - *arg) - reduce));
if (str == NULL)
return FAIL;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = str;
for (p = *arg + 1; *p != NUL; )
{
if (*p == '\'')
{
if (p[1] != '\'')
break;
++p;
}
MB_COPY_CHAR(p, str);
}
*str = NUL;
*arg = p + 1;
return OK;
}
/*
* Return the function name of the partial.
*/
char_u *
partial_name(partial_T *pt)
{
if (pt->pt_name != NULL)
return pt->pt_name;
return pt->pt_func->uf_name;
}
static void
partial_free(partial_T *pt)
{
int i;
for (i = 0; i < pt->pt_argc; ++i)
clear_tv(&pt->pt_argv[i]);
vim_free(pt->pt_argv);
dict_unref(pt->pt_dict);
if (pt->pt_name != NULL)
{
func_unref(pt->pt_name);
vim_free(pt->pt_name);
}
else
func_ptr_unref(pt->pt_func);
vim_free(pt);
}
/*
* Unreference a closure: decrement the reference count and free it when it
* becomes zero.
*/
void
partial_unref(partial_T *pt)
{
if (pt != NULL && --pt->pt_refcount <= 0)
partial_free(pt);
}
static int tv_equal_recurse_limit;
static int
func_equal(
typval_T *tv1,
typval_T *tv2,
int ic) /* ignore case */
{
char_u *s1, *s2;
dict_T *d1, *d2;
int a1, a2;
int i;
/* empty and NULL function name considered the same */
s1 = tv1->v_type == VAR_FUNC ? tv1->vval.v_string
: partial_name(tv1->vval.v_partial);
if (s1 != NULL && *s1 == NUL)
s1 = NULL;
s2 = tv2->v_type == VAR_FUNC ? tv2->vval.v_string
: partial_name(tv2->vval.v_partial);
if (s2 != NULL && *s2 == NUL)
s2 = NULL;
if (s1 == NULL || s2 == NULL)
{
if (s1 != s2)
return FALSE;
}
else if (STRCMP(s1, s2) != 0)
return FALSE;
/* empty dict and NULL dict is different */
d1 = tv1->v_type == VAR_FUNC ? NULL : tv1->vval.v_partial->pt_dict;
d2 = tv2->v_type == VAR_FUNC ? NULL : tv2->vval.v_partial->pt_dict;
if (d1 == NULL || d2 == NULL)
{
if (d1 != d2)
return FALSE;
}
else if (!dict_equal(d1, d2, ic, TRUE))
return FALSE;
/* empty list and no list considered the same */
a1 = tv1->v_type == VAR_FUNC ? 0 : tv1->vval.v_partial->pt_argc;
a2 = tv2->v_type == VAR_FUNC ? 0 : tv2->vval.v_partial->pt_argc;
if (a1 != a2)
return FALSE;
for (i = 0; i < a1; ++i)
if (!tv_equal(tv1->vval.v_partial->pt_argv + i,
tv2->vval.v_partial->pt_argv + i, ic, TRUE))
return FALSE;
return TRUE;
}
/*
* Return TRUE if "tv1" and "tv2" have the same value.
* Compares the items just like "==" would compare them, but strings and
* numbers are different. Floats and numbers are also different.
*/
int
tv_equal(
typval_T *tv1,
typval_T *tv2,
int ic, /* ignore case */
int recursive) /* TRUE when used recursively */
{
char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN];
char_u *s1, *s2;
static int recursive_cnt = 0; /* catch recursive loops */
int r;
/* Catch lists and dicts that have an endless loop by limiting
* recursiveness to a limit. We guess they are equal then.
* A fixed limit has the problem of still taking an awful long time.
* Reduce the limit every time running into it. That should work fine for
* deeply linked structures that are not recursively linked and catch
* recursiveness quickly. */
if (!recursive)
tv_equal_recurse_limit = 1000;
if (recursive_cnt >= tv_equal_recurse_limit)
{
--tv_equal_recurse_limit;
return TRUE;
}
/* For VAR_FUNC and VAR_PARTIAL compare the function name, bound dict and
* arguments. */
if ((tv1->v_type == VAR_FUNC
|| (tv1->v_type == VAR_PARTIAL && tv1->vval.v_partial != NULL))
&& (tv2->v_type == VAR_FUNC
|| (tv2->v_type == VAR_PARTIAL && tv2->vval.v_partial != NULL)))
{
++recursive_cnt;
r = func_equal(tv1, tv2, ic);
--recursive_cnt;
return r;
}
if (tv1->v_type != tv2->v_type)
return FALSE;
switch (tv1->v_type)
{
case VAR_LIST:
++recursive_cnt;
r = list_equal(tv1->vval.v_list, tv2->vval.v_list, ic, TRUE);
--recursive_cnt;
return r;
case VAR_DICT:
++recursive_cnt;
r = dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic, TRUE);
--recursive_cnt;
return r;
case VAR_NUMBER:
return tv1->vval.v_number == tv2->vval.v_number;
case VAR_STRING:
s1 = get_tv_string_buf(tv1, buf1);
s2 = get_tv_string_buf(tv2, buf2);
return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
case VAR_SPECIAL:
return tv1->vval.v_number == tv2->vval.v_number;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
return tv1->vval.v_float == tv2->vval.v_float;
#endif
case VAR_JOB:
#ifdef FEAT_JOB_CHANNEL
return tv1->vval.v_job == tv2->vval.v_job;
#endif
case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
return tv1->vval.v_channel == tv2->vval.v_channel;
#endif
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_UNKNOWN:
break;
}
/* VAR_UNKNOWN can be the result of a invalid expression, let's say it
* does not equal anything, not even itself. */
return FALSE;
}
/*
* Return the next (unique) copy ID.
* Used for serializing nested structures.
*/
int
get_copyID(void)
{
current_copyID += COPYID_INC;
return current_copyID;
}
/*
* Garbage collection for lists and dictionaries.
*
* We use reference counts to be able to free most items right away when they
* are no longer used. But for composite items it's possible that it becomes
* unused while the reference count is > 0: When there is a recursive
* reference. Example:
* :let l = [1, 2, 3]
* :let d = {9: l}
* :let l[1] = d
*
* Since this is quite unusual we handle this with garbage collection: every
* once in a while find out which lists and dicts are not referenced from any
* variable.
*
* Here is a good reference text about garbage collection (refers to Python
* but it applies to all reference-counting mechanisms):
* http://python.ca/nas/python/gc/
*/
/*
* Do garbage collection for lists and dicts.
* When "testing" is TRUE this is called from test_garbagecollect_now().
* Return TRUE if some memory was freed.
*/
int
garbage_collect(int testing)
{
int copyID;
int abort = FALSE;
buf_T *buf;
win_T *wp;
int i;
int did_free = FALSE;
#ifdef FEAT_WINDOWS
tabpage_T *tp;
#endif
if (!testing)
{
/* Only do this once. */
want_garbage_collect = FALSE;
may_garbage_collect = FALSE;
garbage_collect_at_exit = FALSE;
}
/* We advance by two because we add one for items referenced through
* previous_funccal. */
copyID = get_copyID();
/*
* 1. Go through all accessible variables and mark all lists and dicts
* with copyID.
*/
/* Don't free variables in the previous_funccal list unless they are only
* referenced through previous_funccal. This must be first, because if
* the item is referenced elsewhere the funccal must not be freed. */
abort = abort || set_ref_in_previous_funccal(copyID);
/* script-local variables */
for (i = 1; i <= ga_scripts.ga_len; ++i)
abort = abort || set_ref_in_ht(&SCRIPT_VARS(i), copyID, NULL);
/* buffer-local variables */
FOR_ALL_BUFFERS(buf)
abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID,
NULL, NULL);
/* window-local variables */
FOR_ALL_TAB_WINDOWS(tp, wp)
abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID,
NULL, NULL);
#ifdef FEAT_AUTOCMD
if (aucmd_win != NULL)
abort = abort || set_ref_in_item(&aucmd_win->w_winvar.di_tv, copyID,
NULL, NULL);
#endif
#ifdef FEAT_WINDOWS
/* tabpage-local variables */
FOR_ALL_TABPAGES(tp)
abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID,
NULL, NULL);
#endif
/* global variables */
abort = abort || set_ref_in_ht(&globvarht, copyID, NULL);
/* function-local variables */
abort = abort || set_ref_in_call_stack(copyID);
/* named functions (matters for closures) */
abort = abort || set_ref_in_functions(copyID);
/* function call arguments, if v:testing is set. */
abort = abort || set_ref_in_func_args(copyID);
/* v: vars */
abort = abort || set_ref_in_ht(&vimvarht, copyID, NULL);
#ifdef FEAT_LUA
abort = abort || set_ref_in_lua(copyID);
#endif
#ifdef FEAT_PYTHON
abort = abort || set_ref_in_python(copyID);
#endif
#ifdef FEAT_PYTHON3
abort = abort || set_ref_in_python3(copyID);
#endif
#ifdef FEAT_JOB_CHANNEL
abort = abort || set_ref_in_channel(copyID);
abort = abort || set_ref_in_job(copyID);
#endif
#ifdef FEAT_NETBEANS_INTG
abort = abort || set_ref_in_nb_channel(copyID);
#endif
#ifdef FEAT_TIMERS
abort = abort || set_ref_in_timer(copyID);
#endif
if (!abort)
{
/*
* 2. Free lists and dictionaries that are not referenced.
*/
did_free = free_unref_items(copyID);
/*
* 3. Check if any funccal can be freed now.
* This may call us back recursively.
*/
free_unref_funccal(copyID, testing);
}
else if (p_verbose > 0)
{
verb_msg((char_u *)_("Not enough memory to set references, garbage collection aborted!"));
}
return did_free;
}
/*
* Free lists, dictionaries, channels and jobs that are no longer referenced.
*/
static int
free_unref_items(int copyID)
{
int did_free = FALSE;
/* Let all "free" functions know that we are here. This means no
* dictionaries, lists, channels or jobs are to be freed, because we will
* do that here. */
in_free_unref_items = TRUE;
/*
* PASS 1: free the contents of the items. We don't free the items
* themselves yet, so that it is possible to decrement refcount counters
*/
/* Go through the list of dicts and free items without the copyID. */
did_free |= dict_free_nonref(copyID);
/* Go through the list of lists and free items without the copyID. */
did_free |= list_free_nonref(copyID);
#ifdef FEAT_JOB_CHANNEL
/* Go through the list of jobs and free items without the copyID. This
* must happen before doing channels, because jobs refer to channels, but
* the reference from the channel to the job isn't tracked. */
did_free |= free_unused_jobs_contents(copyID, COPYID_MASK);
/* Go through the list of channels and free items without the copyID. */
did_free |= free_unused_channels_contents(copyID, COPYID_MASK);
#endif
/*
* PASS 2: free the items themselves.
*/
dict_free_items(copyID);
list_free_items(copyID);
#ifdef FEAT_JOB_CHANNEL
/* Go through the list of jobs and free items without the copyID. This
* must happen before doing channels, because jobs refer to channels, but
* the reference from the channel to the job isn't tracked. */
free_unused_jobs(copyID, COPYID_MASK);
/* Go through the list of channels and free items without the copyID. */
free_unused_channels(copyID, COPYID_MASK);
#endif
in_free_unref_items = FALSE;
return did_free;
}
/*
* Mark all lists and dicts referenced through hashtab "ht" with "copyID".
* "list_stack" is used to add lists to be marked. Can be NULL.
*
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_ht(hashtab_T *ht, int copyID, list_stack_T **list_stack)
{
int todo;
int abort = FALSE;
hashitem_T *hi;
hashtab_T *cur_ht;
ht_stack_T *ht_stack = NULL;
ht_stack_T *tempitem;
cur_ht = ht;
for (;;)
{
if (!abort)
{
/* Mark each item in the hashtab. If the item contains a hashtab
* it is added to ht_stack, if it contains a list it is added to
* list_stack. */
todo = (int)cur_ht->ht_used;
for (hi = cur_ht->ht_array; todo > 0; ++hi)
if (!HASHITEM_EMPTY(hi))
{
--todo;
abort = abort || set_ref_in_item(&HI2DI(hi)->di_tv, copyID,
&ht_stack, list_stack);
}
}
if (ht_stack == NULL)
break;
/* take an item from the stack */
cur_ht = ht_stack->ht;
tempitem = ht_stack;
ht_stack = ht_stack->prev;
free(tempitem);
}
return abort;
}
/*
* Mark all lists and dicts referenced through list "l" with "copyID".
* "ht_stack" is used to add hashtabs to be marked. Can be NULL.
*
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_list(list_T *l, int copyID, ht_stack_T **ht_stack)
{
listitem_T *li;
int abort = FALSE;
list_T *cur_l;
list_stack_T *list_stack = NULL;
list_stack_T *tempitem;
cur_l = l;
for (;;)
{
if (!abort)
/* Mark each item in the list. If the item contains a hashtab
* it is added to ht_stack, if it contains a list it is added to
* list_stack. */
for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next)
abort = abort || set_ref_in_item(&li->li_tv, copyID,
ht_stack, &list_stack);
if (list_stack == NULL)
break;
/* take an item from the stack */
cur_l = list_stack->list;
tempitem = list_stack;
list_stack = list_stack->prev;
free(tempitem);
}
return abort;
}
/*
* Mark all lists and dicts referenced through typval "tv" with "copyID".
* "list_stack" is used to add lists to be marked. Can be NULL.
* "ht_stack" is used to add hashtabs to be marked. Can be NULL.
*
* Returns TRUE if setting references failed somehow.
*/
int
set_ref_in_item(
typval_T *tv,
int copyID,
ht_stack_T **ht_stack,
list_stack_T **list_stack)
{
int abort = FALSE;
if (tv->v_type == VAR_DICT)
{
dict_T *dd = tv->vval.v_dict;
if (dd != NULL && dd->dv_copyID != copyID)
{
/* Didn't see this dict yet. */
dd->dv_copyID = copyID;
if (ht_stack == NULL)
{
abort = set_ref_in_ht(&dd->dv_hashtab, copyID, list_stack);
}
else
{
ht_stack_T *newitem = (ht_stack_T*)malloc(sizeof(ht_stack_T));
if (newitem == NULL)
abort = TRUE;
else
{
newitem->ht = &dd->dv_hashtab;
newitem->prev = *ht_stack;
*ht_stack = newitem;
}
}
}
}
else if (tv->v_type == VAR_LIST)
{
list_T *ll = tv->vval.v_list;
if (ll != NULL && ll->lv_copyID != copyID)
{
/* Didn't see this list yet. */
ll->lv_copyID = copyID;
if (list_stack == NULL)
{
abort = set_ref_in_list(ll, copyID, ht_stack);
}
else
{
list_stack_T *newitem = (list_stack_T*)malloc(
sizeof(list_stack_T));
if (newitem == NULL)
abort = TRUE;
else
{
newitem->list = ll;
newitem->prev = *list_stack;
*list_stack = newitem;
}
}
}
}
else if (tv->v_type == VAR_FUNC)
{
abort = set_ref_in_func(tv->vval.v_string, NULL, copyID);
}
else if (tv->v_type == VAR_PARTIAL)
{
partial_T *pt = tv->vval.v_partial;
int i;
/* A partial does not have a copyID, because it cannot contain itself.
*/
if (pt != NULL)
{
abort = set_ref_in_func(pt->pt_name, pt->pt_func, copyID);
if (pt->pt_dict != NULL)
{
typval_T dtv;
dtv.v_type = VAR_DICT;
dtv.vval.v_dict = pt->pt_dict;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
for (i = 0; i < pt->pt_argc; ++i)
abort = abort || set_ref_in_item(&pt->pt_argv[i], copyID,
ht_stack, list_stack);
}
}
#ifdef FEAT_JOB_CHANNEL
else if (tv->v_type == VAR_JOB)
{
job_T *job = tv->vval.v_job;
typval_T dtv;
if (job != NULL && job->jv_copyID != copyID)
{
job->jv_copyID = copyID;
if (job->jv_channel != NULL)
{
dtv.v_type = VAR_CHANNEL;
dtv.vval.v_channel = job->jv_channel;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
if (job->jv_exit_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = job->jv_exit_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
}
}
else if (tv->v_type == VAR_CHANNEL)
{
channel_T *ch =tv->vval.v_channel;
ch_part_T part;
typval_T dtv;
jsonq_T *jq;
cbq_T *cq;
if (ch != NULL && ch->ch_copyID != copyID)
{
ch->ch_copyID = copyID;
for (part = PART_SOCK; part < PART_COUNT; ++part)
{
for (jq = ch->ch_part[part].ch_json_head.jq_next; jq != NULL;
jq = jq->jq_next)
set_ref_in_item(jq->jq_value, copyID, ht_stack, list_stack);
for (cq = ch->ch_part[part].ch_cb_head.cq_next; cq != NULL;
cq = cq->cq_next)
if (cq->cq_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = cq->cq_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
if (ch->ch_part[part].ch_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = ch->ch_part[part].ch_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
}
if (ch->ch_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = ch->ch_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
if (ch->ch_close_partial != NULL)
{
dtv.v_type = VAR_PARTIAL;
dtv.vval.v_partial = ch->ch_close_partial;
set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
}
}
}
#endif
return abort;
}
static char *
get_var_special_name(int nr)
{
switch (nr)
{
case VVAL_FALSE: return "v:false";
case VVAL_TRUE: return "v:true";
case VVAL_NONE: return "v:none";
case VVAL_NULL: return "v:null";
}
EMSG2(_(e_intern2), "get_var_special_name()");
return "42";
}
/*
* Return a string with the string representation of a variable.
* If the memory is allocated "tofree" is set to it, otherwise NULL.
* "numbuf" is used for a number.
* When "copyID" is not NULL replace recursive lists and dicts with "...".
* When both "echo_style" and "dict_val" are FALSE, put quotes around stings as
* "string()", otherwise does not put quotes around strings, as ":echo"
* displays values.
* When "restore_copyID" is FALSE, repeated items in dictionaries and lists
* are replaced with "...".
* May return NULL.
*/
char_u *
echo_string_core(
typval_T *tv,
char_u **tofree,
char_u *numbuf,
int copyID,
int echo_style,
int restore_copyID,
int dict_val)
{
static int recurse = 0;
char_u *r = NULL;
if (recurse >= DICT_MAXNEST)
{
if (!did_echo_string_emsg)
{
/* Only give this message once for a recursive call to avoid
* flooding the user with errors. And stop iterating over lists
* and dicts. */
did_echo_string_emsg = TRUE;
EMSG(_("E724: variable nested too deep for displaying"));
}
*tofree = NULL;
return (char_u *)"{E724}";
}
++recurse;
switch (tv->v_type)
{
case VAR_STRING:
if (echo_style && !dict_val)
{
*tofree = NULL;
r = get_tv_string_buf(tv, numbuf);
}
else
{
*tofree = string_quote(tv->vval.v_string, FALSE);
r = *tofree;
}
break;
case VAR_FUNC:
if (echo_style)
{
*tofree = NULL;
r = tv->vval.v_string;
}
else
{
*tofree = string_quote(tv->vval.v_string, TRUE);
r = *tofree;
}
break;
case VAR_PARTIAL:
{
partial_T *pt = tv->vval.v_partial;
char_u *fname = string_quote(pt == NULL ? NULL
: partial_name(pt), FALSE);
garray_T ga;
int i;
char_u *tf;
ga_init2(&ga, 1, 100);
ga_concat(&ga, (char_u *)"function(");
if (fname != NULL)
{
ga_concat(&ga, fname);
vim_free(fname);
}
if (pt != NULL && pt->pt_argc > 0)
{
ga_concat(&ga, (char_u *)", [");
for (i = 0; i < pt->pt_argc; ++i)
{
if (i > 0)
ga_concat(&ga, (char_u *)", ");
ga_concat(&ga,
tv2string(&pt->pt_argv[i], &tf, numbuf, copyID));
vim_free(tf);
}
ga_concat(&ga, (char_u *)"]");
}
if (pt != NULL && pt->pt_dict != NULL)
{
typval_T dtv;
ga_concat(&ga, (char_u *)", ");
dtv.v_type = VAR_DICT;
dtv.vval.v_dict = pt->pt_dict;
ga_concat(&ga, tv2string(&dtv, &tf, numbuf, copyID));
vim_free(tf);
}
ga_concat(&ga, (char_u *)")");
*tofree = ga.ga_data;
r = *tofree;
break;
}
case VAR_LIST:
if (tv->vval.v_list == NULL)
{
*tofree = NULL;
r = NULL;
}
else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID
&& tv->vval.v_list->lv_len > 0)
{
*tofree = NULL;
r = (char_u *)"[...]";
}
else
{
int old_copyID = tv->vval.v_list->lv_copyID;
tv->vval.v_list->lv_copyID = copyID;
*tofree = list2string(tv, copyID, restore_copyID);
if (restore_copyID)
tv->vval.v_list->lv_copyID = old_copyID;
r = *tofree;
}
break;
case VAR_DICT:
if (tv->vval.v_dict == NULL)
{
*tofree = NULL;
r = NULL;
}
else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID
&& tv->vval.v_dict->dv_hashtab.ht_used != 0)
{
*tofree = NULL;
r = (char_u *)"{...}";
}
else
{
int old_copyID = tv->vval.v_dict->dv_copyID;
tv->vval.v_dict->dv_copyID = copyID;
*tofree = dict2string(tv, copyID, restore_copyID);
if (restore_copyID)
tv->vval.v_dict->dv_copyID = old_copyID;
r = *tofree;
}
break;
case VAR_NUMBER:
case VAR_UNKNOWN:
case VAR_JOB:
case VAR_CHANNEL:
*tofree = NULL;
r = get_tv_string_buf(tv, numbuf);
break;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
*tofree = NULL;
vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float);
r = numbuf;
break;
#endif
case VAR_SPECIAL:
*tofree = NULL;
r = (char_u *)get_var_special_name(tv->vval.v_number);
break;
}
if (--recurse == 0)
did_echo_string_emsg = FALSE;
return r;
}
/*
* Return a string with the string representation of a variable.
* If the memory is allocated "tofree" is set to it, otherwise NULL.
* "numbuf" is used for a number.
* Does not put quotes around strings, as ":echo" displays values.
* When "copyID" is not NULL replace recursive lists and dicts with "...".
* May return NULL.
*/
char_u *
echo_string(
typval_T *tv,
char_u **tofree,
char_u *numbuf,
int copyID)
{
return echo_string_core(tv, tofree, numbuf, copyID, TRUE, FALSE, FALSE);
}
/*
* Return a string with the string representation of a variable.
* If the memory is allocated "tofree" is set to it, otherwise NULL.
* "numbuf" is used for a number.
* Puts quotes around strings, so that they can be parsed back by eval().
* May return NULL.
*/
char_u *
tv2string(
typval_T *tv,
char_u **tofree,
char_u *numbuf,
int copyID)
{
return echo_string_core(tv, tofree, numbuf, copyID, FALSE, TRUE, FALSE);
}
/*
* Return string "str" in ' quotes, doubling ' characters.
* If "str" is NULL an empty string is assumed.
* If "function" is TRUE make it function('string').
*/
char_u *
string_quote(char_u *str, int function)
{
unsigned len;
char_u *p, *r, *s;
len = (function ? 13 : 3);
if (str != NULL)
{
len += (unsigned)STRLEN(str);
for (p = str; *p != NUL; mb_ptr_adv(p))
if (*p == '\'')
++len;
}
s = r = alloc(len);
if (r != NULL)
{
if (function)
{
STRCPY(r, "function('");
r += 10;
}
else
*r++ = '\'';
if (str != NULL)
for (p = str; *p != NUL; )
{
if (*p == '\'')
*r++ = '\'';
MB_COPY_CHAR(p, r);
}
*r++ = '\'';
if (function)
*r++ = ')';
*r++ = NUL;
}
return s;
}
#if defined(FEAT_FLOAT) || defined(PROTO)
/*
* Convert the string "text" to a floating point number.
* This uses strtod(). setlocale(LC_NUMERIC, "C") has been used to make sure
* this always uses a decimal point.
* Returns the length of the text that was consumed.
*/
int
string2float(
char_u *text,
float_T *value) /* result stored here */
{
char *s = (char *)text;
float_T f;
f = strtod(s, &s);
*value = f;
return (int)((char_u *)s - text);
}
#endif
/*
* Get the value of an environment variable.
* "arg" is pointing to the '$'. It is advanced to after the name.
* If the environment variable was not set, silently assume it is empty.
* Return FAIL if the name is invalid.
*/
static int
get_env_tv(char_u **arg, typval_T *rettv, int evaluate)
{
char_u *string = NULL;
int len;
int cc;
char_u *name;
int mustfree = FALSE;
++*arg;
name = *arg;
len = get_env_len(arg);
if (evaluate)
{
if (len == 0)
return FAIL; /* invalid empty name */
cc = name[len];
name[len] = NUL;
/* first try vim_getenv(), fast for normal environment vars */
string = vim_getenv(name, &mustfree);
if (string != NULL && *string != NUL)
{
if (!mustfree)
string = vim_strsave(string);
}
else
{
if (mustfree)
vim_free(string);
/* next try expanding things like $VIM and ${HOME} */
string = expand_env_save(name - 1);
if (string != NULL && *string == '$')
{
vim_free(string);
string = NULL;
}
}
name[len] = cc;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = string;
}
return OK;
}
/*
* Translate a String variable into a position.
* Returns NULL when there is an error.
*/
pos_T *
var2fpos(
typval_T *varp,
int dollar_lnum, /* TRUE when $ is last line */
int *fnum) /* set to fnum for '0, 'A, etc. */
{
char_u *name;
static pos_T pos;
pos_T *pp;
/* Argument can be [lnum, col, coladd]. */
if (varp->v_type == VAR_LIST)
{
list_T *l;
int len;
int error = FALSE;
listitem_T *li;
l = varp->vval.v_list;
if (l == NULL)
return NULL;
/* Get the line number */
pos.lnum = list_find_nr(l, 0L, &error);
if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
return NULL; /* invalid line number */
/* Get the column number */
pos.col = list_find_nr(l, 1L, &error);
if (error)
return NULL;
len = (long)STRLEN(ml_get(pos.lnum));
/* We accept "$" for the column number: last column. */
li = list_find(l, 1L);
if (li != NULL && li->li_tv.v_type == VAR_STRING
&& li->li_tv.vval.v_string != NULL
&& STRCMP(li->li_tv.vval.v_string, "$") == 0)
pos.col = len + 1;
/* Accept a position up to the NUL after the line. */
if (pos.col == 0 || (int)pos.col > len + 1)
return NULL; /* invalid column number */
--pos.col;
#ifdef FEAT_VIRTUALEDIT
/* Get the virtual offset. Defaults to zero. */
pos.coladd = list_find_nr(l, 2L, &error);
if (error)
pos.coladd = 0;
#endif
return &pos;
}
name = get_tv_string_chk(varp);
if (name == NULL)
return NULL;
if (name[0] == '.') /* cursor */
return &curwin->w_cursor;
if (name[0] == 'v' && name[1] == NUL) /* Visual start */
{
if (VIsual_active)
return &VIsual;
return &curwin->w_cursor;
}
if (name[0] == '\'') /* mark */
{
pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum);
if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
return NULL;
return pp;
}
#ifdef FEAT_VIRTUALEDIT
pos.coladd = 0;
#endif
if (name[0] == 'w' && dollar_lnum)
{
pos.col = 0;
if (name[1] == '0') /* "w0": first visible line */
{
update_topline();
pos.lnum = curwin->w_topline;
return &pos;
}
else if (name[1] == '$') /* "w$": last visible line */
{
validate_botline();
pos.lnum = curwin->w_botline - 1;
return &pos;
}
}
else if (name[0] == '$') /* last column or line */
{
if (dollar_lnum)
{
pos.lnum = curbuf->b_ml.ml_line_count;
pos.col = 0;
}
else
{
pos.lnum = curwin->w_cursor.lnum;
pos.col = (colnr_T)STRLEN(ml_get_curline());
}
return &pos;
}
return NULL;
}
/*
* Convert list in "arg" into a position and optional file number.
* When "fnump" is NULL there is no file number, only 3 items.
* Note that the column is passed on as-is, the caller may want to decrement
* it to use 1 for the first column.
* Return FAIL when conversion is not possible, doesn't check the position for
* validity.
*/
int
list2fpos(
typval_T *arg,
pos_T *posp,
int *fnump,
colnr_T *curswantp)
{
list_T *l = arg->vval.v_list;
long i = 0;
long n;
/* List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only
* there when "fnump" isn't NULL; "coladd" and "curswant" are optional. */
if (arg->v_type != VAR_LIST
|| l == NULL
|| l->lv_len < (fnump == NULL ? 2 : 3)
|| l->lv_len > (fnump == NULL ? 4 : 5))
return FAIL;
if (fnump != NULL)
{
n = list_find_nr(l, i++, NULL); /* fnum */
if (n < 0)
return FAIL;
if (n == 0)
n = curbuf->b_fnum; /* current buffer */
*fnump = n;
}
n = list_find_nr(l, i++, NULL); /* lnum */
if (n < 0)
return FAIL;
posp->lnum = n;
n = list_find_nr(l, i++, NULL); /* col */
if (n < 0)
return FAIL;
posp->col = n;
#ifdef FEAT_VIRTUALEDIT
n = list_find_nr(l, i, NULL); /* off */
if (n < 0)
posp->coladd = 0;
else
posp->coladd = n;
#endif
if (curswantp != NULL)
*curswantp = list_find_nr(l, i + 1, NULL); /* curswant */
return OK;
}
/*
* Get the length of an environment variable name.
* Advance "arg" to the first character after the name.
* Return 0 for error.
*/
static int
get_env_len(char_u **arg)
{
char_u *p;
int len;
for (p = *arg; vim_isIDc(*p); ++p)
;
if (p == *arg) /* no name found */
return 0;
len = (int)(p - *arg);
*arg = p;
return len;
}
/*
* Get the length of the name of a function or internal variable.
* "arg" is advanced to the first non-white character after the name.
* Return 0 if something is wrong.
*/
int
get_id_len(char_u **arg)
{
char_u *p;
int len;
/* Find the end of the name. */
for (p = *arg; eval_isnamec(*p); ++p)
{
if (*p == ':')
{
/* "s:" is start of "s:var", but "n:" is not and can be used in
* slice "[n:]". Also "xx:" is not a namespace. */
len = (int)(p - *arg);
if ((len == 1 && vim_strchr(NAMESPACE_CHAR, **arg) == NULL)
|| len > 1)
break;
}
}
if (p == *arg) /* no name found */
return 0;
len = (int)(p - *arg);
*arg = skipwhite(p);
return len;
}
/*
* Get the length of the name of a variable or function.
* Only the name is recognized, does not handle ".key" or "[idx]".
* "arg" is advanced to the first non-white character after the name.
* Return -1 if curly braces expansion failed.
* Return 0 if something else is wrong.
* If the name contains 'magic' {}'s, expand them and return the
* expanded name in an allocated string via 'alias' - caller must free.
*/
int
get_name_len(
char_u **arg,
char_u **alias,
int evaluate,
int verbose)
{
int len;
char_u *p;
char_u *expr_start;
char_u *expr_end;
*alias = NULL; /* default to no alias */
if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
&& (*arg)[2] == (int)KE_SNR)
{
/* hard coded <SNR>, already translated */
*arg += 3;
return get_id_len(arg) + 3;
}
len = eval_fname_script(*arg);
if (len > 0)
{
/* literal "<SID>", "s:" or "<SNR>" */
*arg += len;
}
/*
* Find the end of the name; check for {} construction.
*/
p = find_name_end(*arg, &expr_start, &expr_end,
len > 0 ? 0 : FNE_CHECK_START);
if (expr_start != NULL)
{
char_u *temp_string;
if (!evaluate)
{
len += (int)(p - *arg);
*arg = skipwhite(p);
return len;
}
/*
* Include any <SID> etc in the expanded string:
* Thus the -len here.
*/
temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
if (temp_string == NULL)
return -1;
*alias = temp_string;
*arg = skipwhite(p);
return (int)STRLEN(temp_string);
}
len += get_id_len(arg);
if (len == 0 && verbose)
EMSG2(_(e_invexpr2), *arg);
return len;
}
/*
* Find the end of a variable or function name, taking care of magic braces.
* If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
* start and end of the first magic braces item.
* "flags" can have FNE_INCL_BR and FNE_CHECK_START.
* Return a pointer to just after the name. Equal to "arg" if there is no
* valid name.
*/
char_u *
find_name_end(
char_u *arg,
char_u **expr_start,
char_u **expr_end,
int flags)
{
int mb_nest = 0;
int br_nest = 0;
char_u *p;
int len;
if (expr_start != NULL)
{
*expr_start = NULL;
*expr_end = NULL;
}
/* Quick check for valid starting character. */
if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
return arg;
for (p = arg; *p != NUL
&& (eval_isnamec(*p)
|| *p == '{'
|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
|| mb_nest != 0
|| br_nest != 0); mb_ptr_adv(p))
{
if (*p == '\'')
{
/* skip over 'string' to avoid counting [ and ] inside it. */
for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
;
if (*p == NUL)
break;
}
else if (*p == '"')
{
/* skip over "str\"ing" to avoid counting [ and ] inside it. */
for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
if (*p == '\\' && p[1] != NUL)
++p;
if (*p == NUL)
break;
}
else if (br_nest == 0 && mb_nest == 0 && *p == ':')
{
/* "s:" is start of "s:var", but "n:" is not and can be used in
* slice "[n:]". Also "xx:" is not a namespace. But {ns}: is. */
len = (int)(p - arg);
if ((len == 1 && vim_strchr(NAMESPACE_CHAR, *arg) == NULL)
|| (len > 1 && p[-1] != '}'))
break;
}
if (mb_nest == 0)
{
if (*p == '[')
++br_nest;
else if (*p == ']')
--br_nest;
}
if (br_nest == 0)
{
if (*p == '{')
{
mb_nest++;
if (expr_start != NULL && *expr_start == NULL)
*expr_start = p;
}
else if (*p == '}')
{
mb_nest--;
if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
*expr_end = p;
}
}
}
return p;
}
/*
* Expands out the 'magic' {}'s in a variable/function name.
* Note that this can call itself recursively, to deal with
* constructs like foo{bar}{baz}{bam}
* The four pointer arguments point to "foo{expre}ss{ion}bar"
* "in_start" ^
* "expr_start" ^
* "expr_end" ^
* "in_end" ^
*
* Returns a new allocated string, which the caller must free.
* Returns NULL for failure.
*/
static char_u *
make_expanded_name(
char_u *in_start,
char_u *expr_start,
char_u *expr_end,
char_u *in_end)
{
char_u c1;
char_u *retval = NULL;
char_u *temp_result;
char_u *nextcmd = NULL;
if (expr_end == NULL || in_end == NULL)
return NULL;
*expr_start = NUL;
*expr_end = NUL;
c1 = *in_end;
*in_end = NUL;
temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE);
if (temp_result != NULL && nextcmd == NULL)
{
retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
+ (in_end - expr_end) + 1));
if (retval != NULL)
{
STRCPY(retval, in_start);
STRCAT(retval, temp_result);
STRCAT(retval, expr_end + 1);
}
}
vim_free(temp_result);
*in_end = c1; /* put char back for error messages */
*expr_start = '{';
*expr_end = '}';
if (retval != NULL)
{
temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
if (expr_start != NULL)
{
/* Further expansion! */
temp_result = make_expanded_name(retval, expr_start,
expr_end, temp_result);
vim_free(retval);
retval = temp_result;
}
}
return retval;
}
/*
* Return TRUE if character "c" can be used in a variable or function name.
* Does not include '{' or '}' for magic braces.
*/
int
eval_isnamec(int c)
{
return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
}
/*
* Return TRUE if character "c" can be used as the first character in a
* variable or function name (excluding '{' and '}').
*/
int
eval_isnamec1(int c)
{
return (ASCII_ISALPHA(c) || c == '_');
}
/*
* Set number v: variable to "val".
*/
void
set_vim_var_nr(int idx, varnumber_T val)
{
vimvars[idx].vv_nr = val;
}
/*
* Get number v: variable value.
*/
varnumber_T
get_vim_var_nr(int idx)
{
return vimvars[idx].vv_nr;
}
/*
* Get string v: variable value. Uses a static buffer, can only be used once.
*/
char_u *
get_vim_var_str(int idx)
{
return get_tv_string(&vimvars[idx].vv_tv);
}
/*
* Get List v: variable value. Caller must take care of reference count when
* needed.
*/
list_T *
get_vim_var_list(int idx)
{
return vimvars[idx].vv_list;
}
/*
* Set v:char to character "c".
*/
void
set_vim_var_char(int c)
{
char_u buf[MB_MAXBYTES + 1];
#ifdef FEAT_MBYTE
if (has_mbyte)
buf[(*mb_char2bytes)(c, buf)] = NUL;
else
#endif
{
buf[0] = c;
buf[1] = NUL;
}
set_vim_var_string(VV_CHAR, buf, -1);
}
/*
* Set v:count to "count" and v:count1 to "count1".
* When "set_prevcount" is TRUE first set v:prevcount from v:count.
*/
void
set_vcount(
long count,
long count1,
int set_prevcount)
{
if (set_prevcount)
vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
vimvars[VV_COUNT].vv_nr = count;
vimvars[VV_COUNT1].vv_nr = count1;
}
/*
* Set string v: variable to a copy of "val".
*/
void
set_vim_var_string(
int idx,
char_u *val,
int len) /* length of "val" to use or -1 (whole string) */
{
clear_tv(&vimvars[idx].vv_di.di_tv);
vimvars[idx].vv_type = VAR_STRING;
if (val == NULL)
vimvars[idx].vv_str = NULL;
else if (len == -1)
vimvars[idx].vv_str = vim_strsave(val);
else
vimvars[idx].vv_str = vim_strnsave(val, len);
}
/*
* Set List v: variable to "val".
*/
void
set_vim_var_list(int idx, list_T *val)
{
clear_tv(&vimvars[idx].vv_di.di_tv);
vimvars[idx].vv_type = VAR_LIST;
vimvars[idx].vv_list = val;
if (val != NULL)
++val->lv_refcount;
}
/*
* Set Dictionary v: variable to "val".
*/
void
set_vim_var_dict(int idx, dict_T *val)
{
int todo;
hashitem_T *hi;
clear_tv(&vimvars[idx].vv_di.di_tv);
vimvars[idx].vv_type = VAR_DICT;
vimvars[idx].vv_dict = val;
if (val != NULL)
{
++val->dv_refcount;
/* Set readonly */
todo = (int)val->dv_hashtab.ht_used;
for (hi = val->dv_hashtab.ht_array; todo > 0 ; ++hi)
{
if (HASHITEM_EMPTY(hi))
continue;
--todo;
HI2DI(hi)->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
}
}
}
/*
* Set v:register if needed.
*/
void
set_reg_var(int c)
{
char_u regname;
if (c == 0 || c == ' ')
regname = '"';
else
regname = c;
/* Avoid free/alloc when the value is already right. */
if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
set_vim_var_string(VV_REG, &regname, 1);
}
/*
* Get or set v:exception. If "oldval" == NULL, return the current value.
* Otherwise, restore the value to "oldval" and return NULL.
* Must always be called in pairs to save and restore v:exception! Does not
* take care of memory allocations.
*/
char_u *
v_exception(char_u *oldval)
{
if (oldval == NULL)
return vimvars[VV_EXCEPTION].vv_str;
vimvars[VV_EXCEPTION].vv_str = oldval;
return NULL;
}
/*
* Get or set v:throwpoint. If "oldval" == NULL, return the current value.
* Otherwise, restore the value to "oldval" and return NULL.
* Must always be called in pairs to save and restore v:throwpoint! Does not
* take care of memory allocations.
*/
char_u *
v_throwpoint(char_u *oldval)
{
if (oldval == NULL)
return vimvars[VV_THROWPOINT].vv_str;
vimvars[VV_THROWPOINT].vv_str = oldval;
return NULL;
}
#if defined(FEAT_AUTOCMD) || defined(PROTO)
/*
* Set v:cmdarg.
* If "eap" != NULL, use "eap" to generate the value and return the old value.
* If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
* Must always be called in pairs!
*/
char_u *
set_cmdarg(exarg_T *eap, char_u *oldarg)
{
char_u *oldval;
char_u *newval;
unsigned len;
oldval = vimvars[VV_CMDARG].vv_str;
if (eap == NULL)
{
vim_free(oldval);
vimvars[VV_CMDARG].vv_str = oldarg;
return NULL;
}
if (eap->force_bin == FORCE_BIN)
len = 6;
else if (eap->force_bin == FORCE_NOBIN)
len = 8;
else
len = 0;
if (eap->read_edit)
len += 7;
if (eap->force_ff != 0)
len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
# ifdef FEAT_MBYTE
if (eap->force_enc != 0)
len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
if (eap->bad_char != 0)
len += 7 + 4; /* " ++bad=" + "keep" or "drop" */
# endif
newval = alloc(len + 1);
if (newval == NULL)
return NULL;
if (eap->force_bin == FORCE_BIN)
sprintf((char *)newval, " ++bin");
else if (eap->force_bin == FORCE_NOBIN)
sprintf((char *)newval, " ++nobin");
else
*newval = NUL;
if (eap->read_edit)
STRCAT(newval, " ++edit");
if (eap->force_ff != 0)
sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
eap->cmd + eap->force_ff);
# ifdef FEAT_MBYTE
if (eap->force_enc != 0)
sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
eap->cmd + eap->force_enc);
if (eap->bad_char == BAD_KEEP)
STRCPY(newval + STRLEN(newval), " ++bad=keep");
else if (eap->bad_char == BAD_DROP)
STRCPY(newval + STRLEN(newval), " ++bad=drop");
else if (eap->bad_char != 0)
sprintf((char *)newval + STRLEN(newval), " ++bad=%c", eap->bad_char);
# endif
vimvars[VV_CMDARG].vv_str = newval;
return oldval;
}
#endif
/*
* Get the value of internal variable "name".
* Return OK or FAIL.
*/
int
get_var_tv(
char_u *name,
int len, /* length of "name" */
typval_T *rettv, /* NULL when only checking existence */
dictitem_T **dip, /* non-NULL when typval's dict item is needed */
int verbose, /* may give error message */
int no_autoload) /* do not use script autoloading */
{
int ret = OK;
typval_T *tv = NULL;
typval_T atv;
dictitem_T *v;
int cc;
/* truncate the name, so that we can use strcmp() */
cc = name[len];
name[len] = NUL;
/*
* Check for "b:changedtick".
*/
if (STRCMP(name, "b:changedtick") == 0)
{
atv.v_type = VAR_NUMBER;
atv.vval.v_number = curbuf->b_changedtick;
tv = &atv;
}
/*
* Check for user-defined variables.
*/
else
{
v = find_var(name, NULL, no_autoload);
if (v != NULL)
{
tv = &v->di_tv;
if (dip != NULL)
*dip = v;
}
}
if (tv == NULL)
{
if (rettv != NULL && verbose)
EMSG2(_(e_undefvar), name);
ret = FAIL;
}
else if (rettv != NULL)
copy_tv(tv, rettv);
name[len] = cc;
return ret;
}
/*
* Check if variable "name[len]" is a local variable or an argument.
* If so, "*eval_lavars_used" is set to TRUE.
*/
static void
check_vars(char_u *name, int len)
{
int cc;
char_u *varname;
hashtab_T *ht;
if (eval_lavars_used == NULL)
return;
/* truncate the name, so that we can use strcmp() */
cc = name[len];
name[len] = NUL;
ht = find_var_ht(name, &varname);
if (ht == get_funccal_local_ht() || ht == get_funccal_args_ht())
{
if (find_var(name, NULL, TRUE) != NULL)
*eval_lavars_used = TRUE;
}
name[len] = cc;
}
/*
* Handle expr[expr], expr[expr:expr] subscript and .name lookup.
* Also handle function call with Funcref variable: func(expr)
* Can all be combined: dict.func(expr)[idx]['func'](expr)
*/
int
handle_subscript(
char_u **arg,
typval_T *rettv,
int evaluate, /* do more than finding the end */
int verbose) /* give error messages */
{
int ret = OK;
dict_T *selfdict = NULL;
char_u *s;
int len;
typval_T functv;
while (ret == OK
&& (**arg == '['
|| (**arg == '.' && rettv->v_type == VAR_DICT)
|| (**arg == '(' && (!evaluate || rettv->v_type == VAR_FUNC
|| rettv->v_type == VAR_PARTIAL)))
&& !vim_iswhite(*(*arg - 1)))
{
if (**arg == '(')
{
partial_T *pt = NULL;
/* need to copy the funcref so that we can clear rettv */
if (evaluate)
{
functv = *rettv;
rettv->v_type = VAR_UNKNOWN;
/* Invoke the function. Recursive! */
if (functv.v_type == VAR_PARTIAL)
{
pt = functv.vval.v_partial;
s = partial_name(pt);
}
else
s = functv.vval.v_string;
}
else
s = (char_u *)"";
ret = get_func_tv(s, (int)STRLEN(s), rettv, arg,
curwin->w_cursor.lnum, curwin->w_cursor.lnum,
&len, evaluate, pt, selfdict);
/* Clear the funcref afterwards, so that deleting it while
* evaluating the arguments is possible (see test55). */
if (evaluate)
clear_tv(&functv);
/* Stop the expression evaluation when immediately aborting on
* error, or when an interrupt occurred or an exception was thrown
* but not caught. */
if (aborting())
{
if (ret == OK)
clear_tv(rettv);
ret = FAIL;
}
dict_unref(selfdict);
selfdict = NULL;
}
else /* **arg == '[' || **arg == '.' */
{
dict_unref(selfdict);
if (rettv->v_type == VAR_DICT)
{
selfdict = rettv->vval.v_dict;
if (selfdict != NULL)
++selfdict->dv_refcount;
}
else
selfdict = NULL;
if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
{
clear_tv(rettv);
ret = FAIL;
}
}
}
/* Turn "dict.Func" into a partial for "Func" bound to "dict".
* Don't do this when "Func" is already a partial that was bound
* explicitly (pt_auto is FALSE). */
if (selfdict != NULL
&& (rettv->v_type == VAR_FUNC
|| (rettv->v_type == VAR_PARTIAL
&& (rettv->vval.v_partial->pt_auto
|| rettv->vval.v_partial->pt_dict == NULL))))
selfdict = make_partial(selfdict, rettv);
dict_unref(selfdict);
return ret;
}
/*
* Allocate memory for a variable type-value, and make it empty (0 or NULL
* value).
*/
typval_T *
alloc_tv(void)
{
return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
}
/*
* Allocate memory for a variable type-value, and assign a string to it.
* The string "s" must have been allocated, it is consumed.
* Return NULL for out of memory, the variable otherwise.
*/
static typval_T *
alloc_string_tv(char_u *s)
{
typval_T *rettv;
rettv = alloc_tv();
if (rettv != NULL)
{
rettv->v_type = VAR_STRING;
rettv->vval.v_string = s;
}
else
vim_free(s);
return rettv;
}
/*
* Free the memory for a variable type-value.
*/
void
free_tv(typval_T *varp)
{
if (varp != NULL)
{
switch (varp->v_type)
{
case VAR_FUNC:
func_unref(varp->vval.v_string);
/*FALLTHROUGH*/
case VAR_STRING:
vim_free(varp->vval.v_string);
break;
case VAR_PARTIAL:
partial_unref(varp->vval.v_partial);
break;
case VAR_LIST:
list_unref(varp->vval.v_list);
break;
case VAR_DICT:
dict_unref(varp->vval.v_dict);
break;
case VAR_JOB:
#ifdef FEAT_JOB_CHANNEL
job_unref(varp->vval.v_job);
break;
#endif
case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
channel_unref(varp->vval.v_channel);
break;
#endif
case VAR_NUMBER:
case VAR_FLOAT:
case VAR_UNKNOWN:
case VAR_SPECIAL:
break;
}
vim_free(varp);
}
}
/*
* Free the memory for a variable value and set the value to NULL or 0.
*/
void
clear_tv(typval_T *varp)
{
if (varp != NULL)
{
switch (varp->v_type)
{
case VAR_FUNC:
func_unref(varp->vval.v_string);
/*FALLTHROUGH*/
case VAR_STRING:
vim_free(varp->vval.v_string);
varp->vval.v_string = NULL;
break;
case VAR_PARTIAL:
partial_unref(varp->vval.v_partial);
varp->vval.v_partial = NULL;
break;
case VAR_LIST:
list_unref(varp->vval.v_list);
varp->vval.v_list = NULL;
break;
case VAR_DICT:
dict_unref(varp->vval.v_dict);
varp->vval.v_dict = NULL;
break;
case VAR_NUMBER:
case VAR_SPECIAL:
varp->vval.v_number = 0;
break;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
varp->vval.v_float = 0.0;
break;
#endif
case VAR_JOB:
#ifdef FEAT_JOB_CHANNEL
job_unref(varp->vval.v_job);
varp->vval.v_job = NULL;
#endif
break;
case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
channel_unref(varp->vval.v_channel);
varp->vval.v_channel = NULL;
#endif
case VAR_UNKNOWN:
break;
}
varp->v_lock = 0;
}
}
/*
* Set the value of a variable to NULL without freeing items.
*/
void
init_tv(typval_T *varp)
{
if (varp != NULL)
vim_memset(varp, 0, sizeof(typval_T));
}
/*
* Get the number value of a variable.
* If it is a String variable, uses vim_str2nr().
* For incompatible types, return 0.
* get_tv_number_chk() is similar to get_tv_number(), but informs the
* caller of incompatible types: it sets *denote to TRUE if "denote"
* is not NULL or returns -1 otherwise.
*/
varnumber_T
get_tv_number(typval_T *varp)
{
int error = FALSE;
return get_tv_number_chk(varp, &error); /* return 0L on error */
}
varnumber_T
get_tv_number_chk(typval_T *varp, int *denote)
{
varnumber_T n = 0L;
switch (varp->v_type)
{
case VAR_NUMBER:
return varp->vval.v_number;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
EMSG(_("E805: Using a Float as a Number"));
break;
#endif
case VAR_FUNC:
case VAR_PARTIAL:
EMSG(_("E703: Using a Funcref as a Number"));
break;
case VAR_STRING:
if (varp->vval.v_string != NULL)
vim_str2nr(varp->vval.v_string, NULL, NULL,
STR2NR_ALL, &n, NULL, 0);
return n;
case VAR_LIST:
EMSG(_("E745: Using a List as a Number"));
break;
case VAR_DICT:
EMSG(_("E728: Using a Dictionary as a Number"));
break;
case VAR_SPECIAL:
return varp->vval.v_number == VVAL_TRUE ? 1 : 0;
break;
case VAR_JOB:
#ifdef FEAT_JOB_CHANNEL
EMSG(_("E910: Using a Job as a Number"));
break;
#endif
case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
EMSG(_("E913: Using a Channel as a Number"));
break;
#endif
case VAR_UNKNOWN:
EMSG2(_(e_intern2), "get_tv_number(UNKNOWN)");
break;
}
if (denote == NULL) /* useful for values that must be unsigned */
n = -1;
else
*denote = TRUE;
return n;
}
#ifdef FEAT_FLOAT
float_T
get_tv_float(typval_T *varp)
{
switch (varp->v_type)
{
case VAR_NUMBER:
return (float_T)(varp->vval.v_number);
case VAR_FLOAT:
return varp->vval.v_float;
case VAR_FUNC:
case VAR_PARTIAL:
EMSG(_("E891: Using a Funcref as a Float"));
break;
case VAR_STRING:
EMSG(_("E892: Using a String as a Float"));
break;
case VAR_LIST:
EMSG(_("E893: Using a List as a Float"));
break;
case VAR_DICT:
EMSG(_("E894: Using a Dictionary as a Float"));
break;
case VAR_SPECIAL:
EMSG(_("E907: Using a special value as a Float"));
break;
case VAR_JOB:
# ifdef FEAT_JOB_CHANNEL
EMSG(_("E911: Using a Job as a Float"));
break;
# endif
case VAR_CHANNEL:
# ifdef FEAT_JOB_CHANNEL
EMSG(_("E914: Using a Channel as a Float"));
break;
# endif
case VAR_UNKNOWN:
EMSG2(_(e_intern2), "get_tv_float(UNKNOWN)");
break;
}
return 0;
}
#endif
/*
* Get the string value of a variable.
* If it is a Number variable, the number is converted into a string.
* get_tv_string() uses a single, static buffer. YOU CAN ONLY USE IT ONCE!
* get_tv_string_buf() uses a given buffer.
* If the String variable has never been set, return an empty string.
* Never returns NULL;
* get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
* NULL on error.
*/
char_u *
get_tv_string(typval_T *varp)
{
static char_u mybuf[NUMBUFLEN];
return get_tv_string_buf(varp, mybuf);
}
char_u *
get_tv_string_buf(typval_T *varp, char_u *buf)
{
char_u *res = get_tv_string_buf_chk(varp, buf);
return res != NULL ? res : (char_u *)"";
}
/*
* Careful: This uses a single, static buffer. YOU CAN ONLY USE IT ONCE!
*/
char_u *
get_tv_string_chk(typval_T *varp)
{
static char_u mybuf[NUMBUFLEN];
return get_tv_string_buf_chk(varp, mybuf);
}
char_u *
get_tv_string_buf_chk(typval_T *varp, char_u *buf)
{
switch (varp->v_type)
{
case VAR_NUMBER:
vim_snprintf((char *)buf, NUMBUFLEN, "%lld",
(varnumber_T)varp->vval.v_number);
return buf;
case VAR_FUNC:
case VAR_PARTIAL:
EMSG(_("E729: using Funcref as a String"));
break;
case VAR_LIST:
EMSG(_("E730: using List as a String"));
break;
case VAR_DICT:
EMSG(_("E731: using Dictionary as a String"));
break;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
EMSG(_(e_float_as_string));
break;
#endif
case VAR_STRING:
if (varp->vval.v_string != NULL)
return varp->vval.v_string;
return (char_u *)"";
case VAR_SPECIAL:
STRCPY(buf, get_var_special_name(varp->vval.v_number));
return buf;
case VAR_JOB:
#ifdef FEAT_JOB_CHANNEL
{
job_T *job = varp->vval.v_job;
char *status;
if (job == NULL)
return (char_u *)"no process";
status = job->jv_status == JOB_FAILED ? "fail"
: job->jv_status == JOB_ENDED ? "dead"
: "run";
# ifdef UNIX
vim_snprintf((char *)buf, NUMBUFLEN,
"process %ld %s", (long)job->jv_pid, status);
# elif defined(WIN32)
vim_snprintf((char *)buf, NUMBUFLEN,
"process %ld %s",
(long)job->jv_proc_info.dwProcessId,
status);
# else
/* fall-back */
vim_snprintf((char *)buf, NUMBUFLEN, "process ? %s", status);
# endif
return buf;
}
#endif
break;
case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
{
channel_T *channel = varp->vval.v_channel;
char *status = channel_status(channel, -1);
if (channel == NULL)
vim_snprintf((char *)buf, NUMBUFLEN, "channel %s", status);
else
vim_snprintf((char *)buf, NUMBUFLEN,
"channel %d %s", channel->ch_id, status);
return buf;
}
#endif
break;
case VAR_UNKNOWN:
EMSG(_("E908: using an invalid value as a String"));
break;
}
return NULL;
}
/*
* Find variable "name" in the list of variables.
* Return a pointer to it if found, NULL if not found.
* Careful: "a:0" variables don't have a name.
* When "htp" is not NULL we are writing to the variable, set "htp" to the
* hashtab_T used.
*/
dictitem_T *
find_var(char_u *name, hashtab_T **htp, int no_autoload)
{
char_u *varname;
hashtab_T *ht;
dictitem_T *ret = NULL;
ht = find_var_ht(name, &varname);
if (htp != NULL)
*htp = ht;
if (ht == NULL)
return NULL;
ret = find_var_in_ht(ht, *name, varname, no_autoload || htp != NULL);
if (ret != NULL)
return ret;
/* Search in parent scope for lambda */
return find_var_in_scoped_ht(name, no_autoload || htp != NULL);
}
/*
* Find variable "varname" in hashtab "ht" with name "htname".
* Returns NULL if not found.
*/
dictitem_T *
find_var_in_ht(
hashtab_T *ht,
int htname,
char_u *varname,
int no_autoload)
{
hashitem_T *hi;
if (*varname == NUL)
{
/* Must be something like "s:", otherwise "ht" would be NULL. */
switch (htname)
{
case 's': return &SCRIPT_SV(current_SID)->sv_var;
case 'g': return &globvars_var;
case 'v': return &vimvars_var;
case 'b': return &curbuf->b_bufvar;
case 'w': return &curwin->w_winvar;
#ifdef FEAT_WINDOWS
case 't': return &curtab->tp_winvar;
#endif
case 'l': return get_funccal_local_var();
case 'a': return get_funccal_args_var();
}
return NULL;
}
hi = hash_find(ht, varname);
if (HASHITEM_EMPTY(hi))
{
/* For global variables we may try auto-loading the script. If it
* worked find the variable again. Don't auto-load a script if it was
* loaded already, otherwise it would be loaded every time when
* checking if a function name is a Funcref variable. */
if (ht == &globvarht && !no_autoload)
{
/* Note: script_autoload() may make "hi" invalid. It must either
* be obtained again or not used. */
if (!script_autoload(varname, FALSE) || aborting())
return NULL;
hi = hash_find(ht, varname);
}
if (HASHITEM_EMPTY(hi))
return NULL;
}
return HI2DI(hi);
}
/*
* Find the hashtab used for a variable name.
* Return NULL if the name is not valid.
* Set "varname" to the start of name without ':'.
*/
hashtab_T *
find_var_ht(char_u *name, char_u **varname)
{
hashitem_T *hi;
hashtab_T *ht;
if (name[0] == NUL)
return NULL;
if (name[1] != ':')
{
/* The name must not start with a colon or #. */
if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
return NULL;
*varname = name;
/* "version" is "v:version" in all scopes */
hi = hash_find(&compat_hashtab, name);
if (!HASHITEM_EMPTY(hi))
return &compat_hashtab;
ht = get_funccal_local_ht();
if (ht == NULL)
return &globvarht; /* global variable */
return ht; /* local variable */
}
*varname = name + 2;
if (*name == 'g') /* global variable */
return &globvarht;
/* There must be no ':' or '#' in the rest of the name, unless g: is used
*/
if (vim_strchr(name + 2, ':') != NULL
|| vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
return NULL;
if (*name == 'b') /* buffer variable */
return &curbuf->b_vars->dv_hashtab;
if (*name == 'w') /* window variable */
return &curwin->w_vars->dv_hashtab;
#ifdef FEAT_WINDOWS
if (*name == 't') /* tab page variable */
return &curtab->tp_vars->dv_hashtab;
#endif
if (*name == 'v') /* v: variable */
return &vimvarht;
if (*name == 'a') /* a: function argument */
return get_funccal_args_ht();
if (*name == 'l') /* l: local function variable */
return get_funccal_local_ht();
if (*name == 's' /* script variable */
&& current_SID > 0 && current_SID <= ga_scripts.ga_len)
return &SCRIPT_VARS(current_SID);
return NULL;
}
/*
* Get the string value of a (global/local) variable.
* Note: see get_tv_string() for how long the pointer remains valid.
* Returns NULL when it doesn't exist.
*/
char_u *
get_var_value(char_u *name)
{
dictitem_T *v;
v = find_var(name, NULL, FALSE);
if (v == NULL)
return NULL;
return get_tv_string(&v->di_tv);
}
/*
* Allocate a new hashtab for a sourced script. It will be used while
* sourcing this script and when executing functions defined in the script.
*/
void
new_script_vars(scid_T id)
{
int i;
hashtab_T *ht;
scriptvar_T *sv;
if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
{
/* Re-allocating ga_data means that an ht_array pointing to
* ht_smallarray becomes invalid. We can recognize this: ht_mask is
* at its init value. Also reset "v_dict", it's always the same. */
for (i = 1; i <= ga_scripts.ga_len; ++i)
{
ht = &SCRIPT_VARS(i);
if (ht->ht_mask == HT_INIT_SIZE - 1)
ht->ht_array = ht->ht_smallarray;
sv = SCRIPT_SV(i);
sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
}
while (ga_scripts.ga_len < id)
{
sv = SCRIPT_SV(ga_scripts.ga_len + 1) =
(scriptvar_T *)alloc_clear(sizeof(scriptvar_T));
init_var_dict(&sv->sv_dict, &sv->sv_var, VAR_SCOPE);
++ga_scripts.ga_len;
}
}
}
/*
* Initialize dictionary "dict" as a scope and set variable "dict_var" to
* point to it.
*/
void
init_var_dict(dict_T *dict, dictitem_T *dict_var, int scope)
{
hash_init(&dict->dv_hashtab);
dict->dv_lock = 0;
dict->dv_scope = scope;
dict->dv_refcount = DO_NOT_FREE_CNT;
dict->dv_copyID = 0;
dict_var->di_tv.vval.v_dict = dict;
dict_var->di_tv.v_type = VAR_DICT;
dict_var->di_tv.v_lock = VAR_FIXED;
dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
dict_var->di_key[0] = NUL;
}
/*
* Unreference a dictionary initialized by init_var_dict().
*/
void
unref_var_dict(dict_T *dict)
{
/* Now the dict needs to be freed if no one else is using it, go back to
* normal reference counting. */
dict->dv_refcount -= DO_NOT_FREE_CNT - 1;
dict_unref(dict);
}
/*
* Clean up a list of internal variables.
* Frees all allocated variables and the value they contain.
* Clears hashtab "ht", does not free it.
*/
void
vars_clear(hashtab_T *ht)
{
vars_clear_ext(ht, TRUE);
}
/*
* Like vars_clear(), but only free the value if "free_val" is TRUE.
*/
void
vars_clear_ext(hashtab_T *ht, int free_val)
{
int todo;
hashitem_T *hi;
dictitem_T *v;
hash_lock(ht);
todo = (int)ht->ht_used;
for (hi = ht->ht_array; todo > 0; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
--todo;
/* Free the variable. Don't remove it from the hashtab,
* ht_array might change then. hash_clear() takes care of it
* later. */
v = HI2DI(hi);
if (free_val)
clear_tv(&v->di_tv);
if (v->di_flags & DI_FLAGS_ALLOC)
vim_free(v);
}
}
hash_clear(ht);
ht->ht_used = 0;
}
/*
* Delete a variable from hashtab "ht" at item "hi".
* Clear the variable value and free the dictitem.
*/
static void
delete_var(hashtab_T *ht, hashitem_T *hi)
{
dictitem_T *di = HI2DI(hi);
hash_remove(ht, hi);
clear_tv(&di->di_tv);
vim_free(di);
}
/*
* List the value of one internal variable.
*/
static void
list_one_var(dictitem_T *v, char_u *prefix, int *first)
{
char_u *tofree;
char_u *s;
char_u numbuf[NUMBUFLEN];
s = echo_string(&v->di_tv, &tofree, numbuf, get_copyID());
list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
s == NULL ? (char_u *)"" : s, first);
vim_free(tofree);
}
static void
list_one_var_a(
char_u *prefix,
char_u *name,
int type,
char_u *string,
int *first) /* when TRUE clear rest of screen and set to FALSE */
{
/* don't use msg() or msg_attr() to avoid overwriting "v:statusmsg" */
msg_start();
msg_puts(prefix);
if (name != NULL) /* "a:" vars don't have a name stored */
msg_puts(name);
msg_putchar(' ');
msg_advance(22);
if (type == VAR_NUMBER)
msg_putchar('#');
else if (type == VAR_FUNC || type == VAR_PARTIAL)
msg_putchar('*');
else if (type == VAR_LIST)
{
msg_putchar('[');
if (*string == '[')
++string;
}
else if (type == VAR_DICT)
{
msg_putchar('{');
if (*string == '{')
++string;
}
else
msg_putchar(' ');
msg_outtrans(string);
if (type == VAR_FUNC || type == VAR_PARTIAL)
msg_puts((char_u *)"()");
if (*first)
{
msg_clr_eos();
*first = FALSE;
}
}
/*
* Set variable "name" to value in "tv".
* If the variable already exists, the value is updated.
* Otherwise the variable is created.
*/
void
set_var(
char_u *name,
typval_T *tv,
int copy) /* make copy of value in "tv" */
{
dictitem_T *v;
char_u *varname;
hashtab_T *ht;
ht = find_var_ht(name, &varname);
if (ht == NULL || *varname == NUL)
{
EMSG2(_(e_illvar), name);
return;
}
v = find_var_in_ht(ht, 0, varname, TRUE);
/* Search in parent scope which is possible to reference from lambda */
if (v == NULL)
v = find_var_in_scoped_ht(name, TRUE);
if ((tv->v_type == VAR_FUNC || tv->v_type == VAR_PARTIAL)
&& var_check_func_name(name, v == NULL))
return;
if (v != NULL)
{
/* existing variable, need to clear the value */
if (var_check_ro(v->di_flags, name, FALSE)
|| tv_check_lock(v->di_tv.v_lock, name, FALSE))
return;
/*
* Handle setting internal v: variables separately where needed to
* prevent changing the type.
*/
if (ht == &vimvarht)
{
if (v->di_tv.v_type == VAR_STRING)
{
vim_free(v->di_tv.vval.v_string);
if (copy || tv->v_type != VAR_STRING)
v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
else
{
/* Take over the string to avoid an extra alloc/free. */
v->di_tv.vval.v_string = tv->vval.v_string;
tv->vval.v_string = NULL;
}
return;
}
else if (v->di_tv.v_type == VAR_NUMBER)
{
v->di_tv.vval.v_number = get_tv_number(tv);
if (STRCMP(varname, "searchforward") == 0)
set_search_direction(v->di_tv.vval.v_number ? '/' : '?');
#ifdef FEAT_SEARCH_EXTRA
else if (STRCMP(varname, "hlsearch") == 0)
{
no_hlsearch = !v->di_tv.vval.v_number;
redraw_all_later(SOME_VALID);
}
#endif
return;
}
else if (v->di_tv.v_type != tv->v_type)
EMSG2(_(e_intern2), "set_var()");
}
clear_tv(&v->di_tv);
}
else /* add a new variable */
{
/* Can't add "v:" variable. */
if (ht == &vimvarht)
{
EMSG2(_(e_illvar), name);
return;
}
/* Make sure the variable name is valid. */
if (!valid_varname(varname))
return;
v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
+ STRLEN(varname)));
if (v == NULL)
return;
STRCPY(v->di_key, varname);
if (hash_add(ht, DI2HIKEY(v)) == FAIL)
{
vim_free(v);
return;
}
v->di_flags = DI_FLAGS_ALLOC;
}
if (copy || tv->v_type == VAR_NUMBER || tv->v_type == VAR_FLOAT)
copy_tv(tv, &v->di_tv);
else
{
v->di_tv = *tv;
v->di_tv.v_lock = 0;
init_tv(tv);
}
}
/*
* Return TRUE if di_flags "flags" indicates variable "name" is read-only.
* Also give an error message.
*/
int
var_check_ro(int flags, char_u *name, int use_gettext)
{
if (flags & DI_FLAGS_RO)
{
EMSG2(_(e_readonlyvar), use_gettext ? (char_u *)_(name) : name);
return TRUE;
}
if ((flags & DI_FLAGS_RO_SBX) && sandbox)
{
EMSG2(_(e_readonlysbx), use_gettext ? (char_u *)_(name) : name);
return TRUE;
}
return FALSE;
}
/*
* Return TRUE if di_flags "flags" indicates variable "name" is fixed.
* Also give an error message.
*/
int
var_check_fixed(int flags, char_u *name, int use_gettext)
{
if (flags & DI_FLAGS_FIX)
{
EMSG2(_("E795: Cannot delete variable %s"),
use_gettext ? (char_u *)_(name) : name);
return TRUE;
}
return FALSE;
}
/*
* Check if a funcref is assigned to a valid variable name.
* Return TRUE and give an error if not.
*/
int
var_check_func_name(
char_u *name, /* points to start of variable name */
int new_var) /* TRUE when creating the variable */
{
/* Allow for w: b: s: and t:. */
if (!(vim_strchr((char_u *)"wbst", name[0]) != NULL && name[1] == ':')
&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
? name[2] : name[0]))
{
EMSG2(_("E704: Funcref variable name must start with a capital: %s"),
name);
return TRUE;
}
/* Don't allow hiding a function. When "v" is not NULL we might be
* assigning another function to the same var, the type is checked
* below. */
if (new_var && function_exists(name, FALSE))
{
EMSG2(_("E705: Variable name conflicts with existing function: %s"),
name);
return TRUE;
}
return FALSE;
}
/*
* Check if a variable name is valid.
* Return FALSE and give an error if not.
*/
int
valid_varname(char_u *varname)
{
char_u *p;
for (p = varname; *p != NUL; ++p)
if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p))
&& *p != AUTOLOAD_CHAR)
{
EMSG2(_(e_illvar), varname);
return FALSE;
}
return TRUE;
}
/*
* Return TRUE if typeval "tv" is set to be locked (immutable).
* Also give an error message, using "name" or _("name") when use_gettext is
* TRUE.
*/
int
tv_check_lock(int lock, char_u *name, int use_gettext)
{
if (lock & VAR_LOCKED)
{
EMSG2(_("E741: Value is locked: %s"),
name == NULL ? (char_u *)_("Unknown")
: use_gettext ? (char_u *)_(name)
: name);
return TRUE;
}
if (lock & VAR_FIXED)
{
EMSG2(_("E742: Cannot change value of %s"),
name == NULL ? (char_u *)_("Unknown")
: use_gettext ? (char_u *)_(name)
: name);
return TRUE;
}
return FALSE;
}
/*
* Copy the values from typval_T "from" to typval_T "to".
* When needed allocates string or increases reference count.
* Does not make a copy of a list or dict but copies the reference!
* It is OK for "from" and "to" to point to the same item. This is used to
* make a copy later.
*/
void
copy_tv(typval_T *from, typval_T *to)
{
to->v_type = from->v_type;
to->v_lock = 0;
switch (from->v_type)
{
case VAR_NUMBER:
case VAR_SPECIAL:
to->vval.v_number = from->vval.v_number;
break;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
to->vval.v_float = from->vval.v_float;
break;
#endif
case VAR_JOB:
#ifdef FEAT_JOB_CHANNEL
to->vval.v_job = from->vval.v_job;
if (to->vval.v_job != NULL)
++to->vval.v_job->jv_refcount;
break;
#endif
case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
to->vval.v_channel = from->vval.v_channel;
if (to->vval.v_channel != NULL)
++to->vval.v_channel->ch_refcount;
break;
#endif
case VAR_STRING:
case VAR_FUNC:
if (from->vval.v_string == NULL)
to->vval.v_string = NULL;
else
{
to->vval.v_string = vim_strsave(from->vval.v_string);
if (from->v_type == VAR_FUNC)
func_ref(to->vval.v_string);
}
break;
case VAR_PARTIAL:
if (from->vval.v_partial == NULL)
to->vval.v_partial = NULL;
else
{
to->vval.v_partial = from->vval.v_partial;
++to->vval.v_partial->pt_refcount;
}
break;
case VAR_LIST:
if (from->vval.v_list == NULL)
to->vval.v_list = NULL;
else
{
to->vval.v_list = from->vval.v_list;
++to->vval.v_list->lv_refcount;
}
break;
case VAR_DICT:
if (from->vval.v_dict == NULL)
to->vval.v_dict = NULL;
else
{
to->vval.v_dict = from->vval.v_dict;
++to->vval.v_dict->dv_refcount;
}
break;
case VAR_UNKNOWN:
EMSG2(_(e_intern2), "copy_tv(UNKNOWN)");
break;
}
}
/*
* Make a copy of an item.
* Lists and Dictionaries are also copied. A deep copy if "deep" is set.
* For deepcopy() "copyID" is zero for a full copy or the ID for when a
* reference to an already copied list/dict can be used.
* Returns FAIL or OK.
*/
int
item_copy(
typval_T *from,
typval_T *to,
int deep,
int copyID)
{
static int recurse = 0;
int ret = OK;
if (recurse >= DICT_MAXNEST)
{
EMSG(_("E698: variable nested too deep for making a copy"));
return FAIL;
}
++recurse;
switch (from->v_type)
{
case VAR_NUMBER:
case VAR_FLOAT:
case VAR_STRING:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_SPECIAL:
case VAR_JOB:
case VAR_CHANNEL:
copy_tv(from, to);
break;
case VAR_LIST:
to->v_type = VAR_LIST;
to->v_lock = 0;
if (from->vval.v_list == NULL)
to->vval.v_list = NULL;
else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
{
/* use the copy made earlier */
to->vval.v_list = from->vval.v_list->lv_copylist;
++to->vval.v_list->lv_refcount;
}
else
to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
if (to->vval.v_list == NULL)
ret = FAIL;
break;
case VAR_DICT:
to->v_type = VAR_DICT;
to->v_lock = 0;
if (from->vval.v_dict == NULL)
to->vval.v_dict = NULL;
else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
{
/* use the copy made earlier */
to->vval.v_dict = from->vval.v_dict->dv_copydict;
++to->vval.v_dict->dv_refcount;
}
else
to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
if (to->vval.v_dict == NULL)
ret = FAIL;
break;
case VAR_UNKNOWN:
EMSG2(_(e_intern2), "item_copy(UNKNOWN)");
ret = FAIL;
}
--recurse;
return ret;
}
/*
* This function is used by f_input() and f_inputdialog() functions. The third
* argument to f_input() specifies the type of completion to use at the
* prompt. The third argument to f_inputdialog() specifies the value to return
* when the user cancels the prompt.
*/
void
get_user_input(
typval_T *argvars,
typval_T *rettv,
int inputdialog,
int secret)
{
char_u *prompt = get_tv_string_chk(&argvars[0]);
char_u *p = NULL;
int c;
char_u buf[NUMBUFLEN];
int cmd_silent_save = cmd_silent;
char_u *defstr = (char_u *)"";
int xp_type = EXPAND_NOTHING;
char_u *xp_arg = NULL;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = NULL;
#ifdef NO_CONSOLE_INPUT
/* While starting up, there is no place to enter text. */
if (no_console_input())
return;
#endif
cmd_silent = FALSE; /* Want to see the prompt. */
if (prompt != NULL)
{
/* Only the part of the message after the last NL is considered as
* prompt for the command line */
p = vim_strrchr(prompt, '\n');
if (p == NULL)
p = prompt;
else
{
++p;
c = *p;
*p = NUL;
msg_start();
msg_clr_eos();
msg_puts_attr(prompt, echo_attr);
msg_didout = FALSE;
msg_starthere();
*p = c;
}
cmdline_row = msg_row;
if (argvars[1].v_type != VAR_UNKNOWN)
{
defstr = get_tv_string_buf_chk(&argvars[1], buf);
if (defstr != NULL)
stuffReadbuffSpec(defstr);
if (!inputdialog && argvars[2].v_type != VAR_UNKNOWN)
{
char_u *xp_name;
int xp_namelen;
long argt;
/* input() with a third argument: completion */
rettv->vval.v_string = NULL;
xp_name = get_tv_string_buf_chk(&argvars[2], buf);
if (xp_name == NULL)
return;
xp_namelen = (int)STRLEN(xp_name);
if (parse_compl_arg(xp_name, xp_namelen, &xp_type, &argt,
&xp_arg) == FAIL)
return;
}
}
if (defstr != NULL)
{
int save_ex_normal_busy = ex_normal_busy;
ex_normal_busy = 0;
rettv->vval.v_string =
getcmdline_prompt(secret ? NUL : '@', p, echo_attr,
xp_type, xp_arg);
ex_normal_busy = save_ex_normal_busy;
}
if (inputdialog && rettv->vval.v_string == NULL
&& argvars[1].v_type != VAR_UNKNOWN
&& argvars[2].v_type != VAR_UNKNOWN)
rettv->vval.v_string = vim_strsave(get_tv_string_buf(
&argvars[2], buf));
vim_free(xp_arg);
/* since the user typed this, no need to wait for return */
need_wait_return = FALSE;
msg_didout = FALSE;
}
cmd_silent = cmd_silent_save;
}
/*
* ":echo expr1 ..." print each argument separated with a space, add a
* newline at the end.
* ":echon expr1 ..." print each argument plain.
*/
void
ex_echo(exarg_T *eap)
{
char_u *arg = eap->arg;
typval_T rettv;
char_u *tofree;
char_u *p;
int needclr = TRUE;
int atstart = TRUE;
char_u numbuf[NUMBUFLEN];
if (eap->skip)
++emsg_skip;
while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
{
/* If eval1() causes an error message the text from the command may
* still need to be cleared. E.g., "echo 22,44". */
need_clr_eos = needclr;
p = arg;
if (eval1(&arg, &rettv, !eap->skip) == FAIL)
{
/*
* Report the invalid expression unless the expression evaluation
* has been cancelled due to an aborting error, an interrupt, or an
* exception.
*/
if (!aborting())
EMSG2(_(e_invexpr2), p);
need_clr_eos = FALSE;
break;
}
need_clr_eos = FALSE;
if (!eap->skip)
{
if (atstart)
{
atstart = FALSE;
/* Call msg_start() after eval1(), evaluating the expression
* may cause a message to appear. */
if (eap->cmdidx == CMD_echo)
{
/* Mark the saved text as finishing the line, so that what
* follows is displayed on a new line when scrolling back
* at the more prompt. */
msg_sb_eol();
msg_start();
}
}
else if (eap->cmdidx == CMD_echo)
msg_puts_attr((char_u *)" ", echo_attr);
p = echo_string(&rettv, &tofree, numbuf, get_copyID());
if (p != NULL)
for ( ; *p != NUL && !got_int; ++p)
{
if (*p == '\n' || *p == '\r' || *p == TAB)
{
if (*p != TAB && needclr)
{
/* remove any text still there from the command */
msg_clr_eos();
needclr = FALSE;
}
msg_putchar_attr(*p, echo_attr);
}
else
{
#ifdef FEAT_MBYTE
if (has_mbyte)
{
int i = (*mb_ptr2len)(p);
(void)msg_outtrans_len_attr(p, i, echo_attr);
p += i - 1;
}
else
#endif
(void)msg_outtrans_len_attr(p, 1, echo_attr);
}
}
vim_free(tofree);
}
clear_tv(&rettv);
arg = skipwhite(arg);
}
eap->nextcmd = check_nextcmd(arg);
if (eap->skip)
--emsg_skip;
else
{
/* remove text that may still be there from the command */
if (needclr)
msg_clr_eos();
if (eap->cmdidx == CMD_echo)
msg_end();
}
}
/*
* ":echohl {name}".
*/
void
ex_echohl(exarg_T *eap)
{
int id;
id = syn_name2id(eap->arg);
if (id == 0)
echo_attr = 0;
else
echo_attr = syn_id2attr(id);
}
/*
* ":execute expr1 ..." execute the result of an expression.
* ":echomsg expr1 ..." Print a message
* ":echoerr expr1 ..." Print an error
* Each gets spaces around each argument and a newline at the end for
* echo commands
*/
void
ex_execute(exarg_T *eap)
{
char_u *arg = eap->arg;
typval_T rettv;
int ret = OK;
char_u *p;
garray_T ga;
int len;
int save_did_emsg;
ga_init2(&ga, 1, 80);
if (eap->skip)
++emsg_skip;
while (*arg != NUL && *arg != '|' && *arg != '\n')
{
p = arg;
if (eval1(&arg, &rettv, !eap->skip) == FAIL)
{
/*
* Report the invalid expression unless the expression evaluation
* has been cancelled due to an aborting error, an interrupt, or an
* exception.
*/
if (!aborting())
EMSG2(_(e_invexpr2), p);
ret = FAIL;
break;
}
if (!eap->skip)
{
p = get_tv_string(&rettv);
len = (int)STRLEN(p);
if (ga_grow(&ga, len + 2) == FAIL)
{
clear_tv(&rettv);
ret = FAIL;
break;
}
if (ga.ga_len)
((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
ga.ga_len += len;
}
clear_tv(&rettv);
arg = skipwhite(arg);
}
if (ret != FAIL && ga.ga_data != NULL)
{
if (eap->cmdidx == CMD_echomsg)
{
MSG_ATTR(ga.ga_data, echo_attr);
out_flush();
}
else if (eap->cmdidx == CMD_echoerr)
{
/* We don't want to abort following commands, restore did_emsg. */
save_did_emsg = did_emsg;
EMSG((char_u *)ga.ga_data);
if (!force_abort)
did_emsg = save_did_emsg;
}
else if (eap->cmdidx == CMD_execute)
do_cmdline((char_u *)ga.ga_data,
eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
}
ga_clear(&ga);
if (eap->skip)
--emsg_skip;
eap->nextcmd = check_nextcmd(arg);
}
/*
* Find window specified by "vp" in tabpage "tp".
*/
win_T *
find_win_by_nr(
typval_T *vp,
tabpage_T *tp UNUSED) /* NULL for current tab page */
{
#ifdef FEAT_WINDOWS
win_T *wp;
#endif
int nr;
nr = (int)get_tv_number_chk(vp, NULL);
#ifdef FEAT_WINDOWS
if (nr < 0)
return NULL;
if (nr == 0)
return curwin;
FOR_ALL_WINDOWS_IN_TAB(tp, wp)
{
if (nr >= LOWEST_WIN_ID)
{
if (wp->w_id == nr)
return wp;
}
else if (--nr <= 0)
break;
}
if (nr >= LOWEST_WIN_ID)
return NULL;
return wp;
#else
if (nr == 0 || nr == 1 || nr == curwin->w_id)
return curwin;
return NULL;
#endif
}
/*
* Find window specified by "wvp" in tabpage "tvp".
*/
win_T *
find_tabwin(
typval_T *wvp, /* VAR_UNKNOWN for current window */
typval_T *tvp) /* VAR_UNKNOWN for current tab page */
{
win_T *wp = NULL;
tabpage_T *tp = NULL;
long n;
if (wvp->v_type != VAR_UNKNOWN)
{
if (tvp->v_type != VAR_UNKNOWN)
{
n = (long)get_tv_number(tvp);
if (n >= 0)
tp = find_tabpage(n);
}
else
tp = curtab;
if (tp != NULL)
wp = find_win_by_nr(wvp, tp);
}
else
wp = curwin;
return wp;
}
/*
* getwinvar() and gettabwinvar()
*/
void
getwinvar(
typval_T *argvars,
typval_T *rettv,
int off) /* 1 for gettabwinvar() */
{
win_T *win;
char_u *varname;
dictitem_T *v;
tabpage_T *tp = NULL;
int done = FALSE;
#ifdef FEAT_WINDOWS
win_T *oldcurwin;
tabpage_T *oldtabpage;
int need_switch_win;
#endif
#ifdef FEAT_WINDOWS
if (off == 1)
tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
else
tp = curtab;
#endif
win = find_win_by_nr(&argvars[off], tp);
varname = get_tv_string_chk(&argvars[off + 1]);
++emsg_off;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = NULL;
if (win != NULL && varname != NULL)
{
#ifdef FEAT_WINDOWS
/* Set curwin to be our win, temporarily. Also set the tabpage,
* otherwise the window is not valid. Only do this when needed,
* autocommands get blocked. */
need_switch_win = !(tp == curtab && win == curwin);
if (!need_switch_win
|| switch_win(&oldcurwin, &oldtabpage, win, tp, TRUE) == OK)
#endif
{
if (*varname == '&')
{
if (varname[1] == NUL)
{
/* get all window-local options in a dict */
dict_T *opts = get_winbuf_options(FALSE);
if (opts != NULL)
{
rettv->v_type = VAR_DICT;
rettv->vval.v_dict = opts;
++opts->dv_refcount;
done = TRUE;
}
}
else if (get_option_tv(&varname, rettv, 1) == OK)
/* window-local-option */
done = TRUE;
}
else
{
/* Look up the variable. */
/* Let getwinvar({nr}, "") return the "w:" dictionary. */
v = find_var_in_ht(&win->w_vars->dv_hashtab, 'w',
varname, FALSE);
if (v != NULL)
{
copy_tv(&v->di_tv, rettv);
done = TRUE;
}
}
}
#ifdef FEAT_WINDOWS
if (need_switch_win)
/* restore previous notion of curwin */
restore_win(oldcurwin, oldtabpage, TRUE);
#endif
}
if (!done && argvars[off + 2].v_type != VAR_UNKNOWN)
/* use the default return value */
copy_tv(&argvars[off + 2], rettv);
--emsg_off;
}
/*
* "setwinvar()" and "settabwinvar()" functions
*/
void
setwinvar(typval_T *argvars, typval_T *rettv UNUSED, int off)
{
win_T *win;
#ifdef FEAT_WINDOWS
win_T *save_curwin;
tabpage_T *save_curtab;
int need_switch_win;
#endif
char_u *varname, *winvarname;
typval_T *varp;
char_u nbuf[NUMBUFLEN];
tabpage_T *tp = NULL;
if (check_restricted() || check_secure())
return;
#ifdef FEAT_WINDOWS
if (off == 1)
tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
else
tp = curtab;
#endif
win = find_win_by_nr(&argvars[off], tp);
varname = get_tv_string_chk(&argvars[off + 1]);
varp = &argvars[off + 2];
if (win != NULL && varname != NULL && varp != NULL)
{
#ifdef FEAT_WINDOWS
need_switch_win = !(tp == curtab && win == curwin);
if (!need_switch_win
|| switch_win(&save_curwin, &save_curtab, win, tp, TRUE) == OK)
#endif
{
if (*varname == '&')
{
long numval;
char_u *strval;
int error = FALSE;
++varname;
numval = (long)get_tv_number_chk(varp, &error);
strval = get_tv_string_buf_chk(varp, nbuf);
if (!error && strval != NULL)
set_option_value(varname, numval, strval, OPT_LOCAL);
}
else
{
winvarname = alloc((unsigned)STRLEN(varname) + 3);
if (winvarname != NULL)
{
STRCPY(winvarname, "w:");
STRCPY(winvarname + 2, varname);
set_var(winvarname, varp, TRUE);
vim_free(winvarname);
}
}
}
#ifdef FEAT_WINDOWS
if (need_switch_win)
restore_win(save_curwin, save_curtab, TRUE);
#endif
}
}
/*
* Skip over the name of an option: "&option", "&g:option" or "&l:option".
* "arg" points to the "&" or '+' when called, to "option" when returning.
* Returns NULL when no option name found. Otherwise pointer to the char
* after the option name.
*/
static char_u *
find_option_end(char_u **arg, int *opt_flags)
{
char_u *p = *arg;
++p;
if (*p == 'g' && p[1] == ':')
{
*opt_flags = OPT_GLOBAL;
p += 2;
}
else if (*p == 'l' && p[1] == ':')
{
*opt_flags = OPT_LOCAL;
p += 2;
}
else
*opt_flags = 0;
if (!ASCII_ISALPHA(*p))
return NULL;
*arg = p;
if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
p += 4; /* termcap option */
else
while (ASCII_ISALPHA(*p))
++p;
return p;
}
/*
* Return the autoload script name for a function or variable name.
* Returns NULL when out of memory.
*/
char_u *
autoload_name(char_u *name)
{
char_u *p;
char_u *scriptname;
/* Get the script file name: replace '#' with '/', append ".vim". */
scriptname = alloc((unsigned)(STRLEN(name) + 14));
if (scriptname == NULL)
return FALSE;
STRCPY(scriptname, "autoload/");
STRCAT(scriptname, name);
*vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
STRCAT(scriptname, ".vim");
while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
*p = '/';
return scriptname;
}
/*
* If "name" has a package name try autoloading the script for it.
* Return TRUE if a package was loaded.
*/
int
script_autoload(
char_u *name,
int reload) /* load script again when already loaded */
{
char_u *p;
char_u *scriptname, *tofree;
int ret = FALSE;
int i;
/* If there is no '#' after name[0] there is no package name. */
p = vim_strchr(name, AUTOLOAD_CHAR);
if (p == NULL || p == name)
return FALSE;
tofree = scriptname = autoload_name(name);
/* Find the name in the list of previously loaded package names. Skip
* "autoload/", it's always the same. */
for (i = 0; i < ga_loaded.ga_len; ++i)
if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
break;
if (!reload && i < ga_loaded.ga_len)
ret = FALSE; /* was loaded already */
else
{
/* Remember the name if it wasn't loaded already. */
if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
{
((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
tofree = NULL;
}
/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
if (source_runtime(scriptname, 0) == OK)
ret = TRUE;
}
vim_free(tofree);
return ret;
}
#if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
typedef enum
{
VAR_FLAVOUR_DEFAULT, /* doesn't start with uppercase */
VAR_FLAVOUR_SESSION, /* starts with uppercase, some lower */
VAR_FLAVOUR_VIMINFO /* all uppercase */
} var_flavour_T;
static var_flavour_T var_flavour(char_u *varname);
static var_flavour_T
var_flavour(char_u *varname)
{
char_u *p = varname;
if (ASCII_ISUPPER(*p))
{
while (*(++p))
if (ASCII_ISLOWER(*p))
return VAR_FLAVOUR_SESSION;
return VAR_FLAVOUR_VIMINFO;
}
else
return VAR_FLAVOUR_DEFAULT;
}
#endif
#if defined(FEAT_VIMINFO) || defined(PROTO)
/*
* Restore global vars that start with a capital from the viminfo file
*/
int
read_viminfo_varlist(vir_T *virp, int writing)
{
char_u *tab;
int type = VAR_NUMBER;
typval_T tv;
void *save_funccal;
if (!writing && (find_viminfo_parameter('!') != NULL))
{
tab = vim_strchr(virp->vir_line + 1, '\t');
if (tab != NULL)
{
*tab++ = '\0'; /* isolate the variable name */
switch (*tab)
{
case 'S': type = VAR_STRING; break;
#ifdef FEAT_FLOAT
case 'F': type = VAR_FLOAT; break;
#endif
case 'D': type = VAR_DICT; break;
case 'L': type = VAR_LIST; break;
case 'X': type = VAR_SPECIAL; break;
}
tab = vim_strchr(tab, '\t');
if (tab != NULL)
{
tv.v_type = type;
if (type == VAR_STRING || type == VAR_DICT || type == VAR_LIST)
tv.vval.v_string = viminfo_readstring(virp,
(int)(tab - virp->vir_line + 1), TRUE);
#ifdef FEAT_FLOAT
else if (type == VAR_FLOAT)
(void)string2float(tab + 1, &tv.vval.v_float);
#endif
else
tv.vval.v_number = atol((char *)tab + 1);
if (type == VAR_DICT || type == VAR_LIST)
{
typval_T *etv = eval_expr(tv.vval.v_string, NULL);
if (etv == NULL)
/* Failed to parse back the dict or list, use it as a
* string. */
tv.v_type = VAR_STRING;
else
{
vim_free(tv.vval.v_string);
tv = *etv;
vim_free(etv);
}
}
/* when in a function use global variables */
save_funccal = clear_current_funccal();
set_var(virp->vir_line + 1, &tv, FALSE);
restore_current_funccal(save_funccal);
if (tv.v_type == VAR_STRING)
vim_free(tv.vval.v_string);
else if (tv.v_type == VAR_DICT || tv.v_type == VAR_LIST)
clear_tv(&tv);
}
}
}
return viminfo_readline(virp);
}
/*
* Write global vars that start with a capital to the viminfo file
*/
void
write_viminfo_varlist(FILE *fp)
{
hashitem_T *hi;
dictitem_T *this_var;
int todo;
char *s = "";
char_u *p;
char_u *tofree;
char_u numbuf[NUMBUFLEN];
if (find_viminfo_parameter('!') == NULL)
return;
fputs(_("\n# global variables:\n"), fp);
todo = (int)globvarht.ht_used;
for (hi = globvarht.ht_array; todo > 0; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
--todo;
this_var = HI2DI(hi);
if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
{
switch (this_var->di_tv.v_type)
{
case VAR_STRING: s = "STR"; break;
case VAR_NUMBER: s = "NUM"; break;
case VAR_FLOAT: s = "FLO"; break;
case VAR_DICT: s = "DIC"; break;
case VAR_LIST: s = "LIS"; break;
case VAR_SPECIAL: s = "XPL"; break;
case VAR_UNKNOWN:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_JOB:
case VAR_CHANNEL:
continue;
}
fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
p = echo_string(&this_var->di_tv, &tofree, numbuf, 0);
if (p != NULL)
viminfo_writestring(fp, p);
vim_free(tofree);
}
}
}
}
#endif
#if defined(FEAT_SESSION) || defined(PROTO)
int
store_session_globals(FILE *fd)
{
hashitem_T *hi;
dictitem_T *this_var;
int todo;
char_u *p, *t;
todo = (int)globvarht.ht_used;
for (hi = globvarht.ht_array; todo > 0; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
--todo;
this_var = HI2DI(hi);
if ((this_var->di_tv.v_type == VAR_NUMBER
|| this_var->di_tv.v_type == VAR_STRING)
&& var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
{
/* Escape special characters with a backslash. Turn a LF and
* CR into \n and \r. */
p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
(char_u *)"\\\"\n\r");
if (p == NULL) /* out of memory */
break;
for (t = p; *t != NUL; ++t)
if (*t == '\n')
*t = 'n';
else if (*t == '\r')
*t = 'r';
if ((fprintf(fd, "let %s = %c%s%c",
this_var->di_key,
(this_var->di_tv.v_type == VAR_STRING) ? '"'
: ' ',
p,
(this_var->di_tv.v_type == VAR_STRING) ? '"'
: ' ') < 0)
|| put_eol(fd) == FAIL)
{
vim_free(p);
return FAIL;
}
vim_free(p);
}
#ifdef FEAT_FLOAT
else if (this_var->di_tv.v_type == VAR_FLOAT
&& var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
{
float_T f = this_var->di_tv.vval.v_float;
int sign = ' ';
if (f < 0)
{
f = -f;
sign = '-';
}
if ((fprintf(fd, "let %s = %c%f",
this_var->di_key, sign, f) < 0)
|| put_eol(fd) == FAIL)
return FAIL;
}
#endif
}
}
return OK;
}
#endif
/*
* Display script name where an item was last set.
* Should only be invoked when 'verbose' is non-zero.
*/
void
last_set_msg(scid_T scriptID)
{
char_u *p;
if (scriptID != 0)
{
p = home_replace_save(NULL, get_scriptname(scriptID));
if (p != NULL)
{
verbose_enter();
MSG_PUTS(_("\n\tLast set from "));
MSG_PUTS(p);
vim_free(p);
verbose_leave();
}
}
}
/* reset v:option_new, v:option_old and v:option_type */
void
reset_v_option_vars(void)
{
set_vim_var_string(VV_OPTION_NEW, NULL, -1);
set_vim_var_string(VV_OPTION_OLD, NULL, -1);
set_vim_var_string(VV_OPTION_TYPE, NULL, -1);
}
/*
* Prepare "gap" for an assert error and add the sourcing position.
*/
void
prepare_assert_error(garray_T *gap)
{
char buf[NUMBUFLEN];
ga_init2(gap, 1, 100);
if (sourcing_name != NULL)
{
ga_concat(gap, sourcing_name);
if (sourcing_lnum > 0)
ga_concat(gap, (char_u *)" ");
}
if (sourcing_lnum > 0)
{
sprintf(buf, "line %ld", (long)sourcing_lnum);
ga_concat(gap, (char_u *)buf);
}
if (sourcing_name != NULL || sourcing_lnum > 0)
ga_concat(gap, (char_u *)": ");
}
/*
* Add an assert error to v:errors.
*/
void
assert_error(garray_T *gap)
{
struct vimvar *vp = &vimvars[VV_ERRORS];
if (vp->vv_type != VAR_LIST || vimvars[VV_ERRORS].vv_list == NULL)
/* Make sure v:errors is a list. */
set_vim_var_list(VV_ERRORS, list_alloc());
list_append_string(vimvars[VV_ERRORS].vv_list, gap->ga_data, gap->ga_len);
}
void
assert_equal_common(typval_T *argvars, assert_type_T atype)
{
garray_T ga;
if (tv_equal(&argvars[0], &argvars[1], FALSE, FALSE)
!= (atype == ASSERT_EQUAL))
{
prepare_assert_error(&ga);
fill_assert_error(&ga, &argvars[2], NULL, &argvars[0], &argvars[1],
atype);
assert_error(&ga);
ga_clear(&ga);
}
}
void
assert_match_common(typval_T *argvars, assert_type_T atype)
{
garray_T ga;
char_u buf1[NUMBUFLEN];
char_u buf2[NUMBUFLEN];
char_u *pat = get_tv_string_buf_chk(&argvars[0], buf1);
char_u *text = get_tv_string_buf_chk(&argvars[1], buf2);
if (pat == NULL || text == NULL)
EMSG(_(e_invarg));
else if (pattern_match(pat, text, FALSE) != (atype == ASSERT_MATCH))
{
prepare_assert_error(&ga);
fill_assert_error(&ga, &argvars[2], NULL, &argvars[0], &argvars[1],
atype);
assert_error(&ga);
ga_clear(&ga);
}
}
void
assert_inrange(typval_T *argvars)
{
garray_T ga;
int error = FALSE;
varnumber_T lower = get_tv_number_chk(&argvars[0], &error);
varnumber_T upper = get_tv_number_chk(&argvars[1], &error);
varnumber_T actual = get_tv_number_chk(&argvars[2], &error);
char_u *tofree;
char msg[200];
char_u numbuf[NUMBUFLEN];
if (error)
return;
if (actual < lower || actual > upper)
{
prepare_assert_error(&ga);
if (argvars[3].v_type != VAR_UNKNOWN)
{
ga_concat(&ga, tv2string(&argvars[3], &tofree, numbuf, 0));
vim_free(tofree);
}
else
{
vim_snprintf(msg, 200, "Expected range %ld - %ld, but got %ld",
(long)lower, (long)upper, (long)actual);
ga_concat(&ga, (char_u *)msg);
}
assert_error(&ga);
ga_clear(&ga);
}
}
/*
* Common for assert_true() and assert_false().
*/
void
assert_bool(typval_T *argvars, int isTrue)
{
int error = FALSE;
garray_T ga;
if (argvars[0].v_type == VAR_SPECIAL
&& argvars[0].vval.v_number == (isTrue ? VVAL_TRUE : VVAL_FALSE))
return;
if (argvars[0].v_type != VAR_NUMBER
|| (get_tv_number_chk(&argvars[0], &error) == 0) == isTrue
|| error)
{
prepare_assert_error(&ga);
fill_assert_error(&ga, &argvars[1],
(char_u *)(isTrue ? "True" : "False"),
NULL, &argvars[0], ASSERT_OTHER);
assert_error(&ga);
ga_clear(&ga);
}
}
void
assert_exception(typval_T *argvars)
{
garray_T ga;
char_u *error = get_tv_string_chk(&argvars[0]);
if (vimvars[VV_EXCEPTION].vv_str == NULL)
{
prepare_assert_error(&ga);
ga_concat(&ga, (char_u *)"v:exception is not set");
assert_error(&ga);
ga_clear(&ga);
}
else if (error != NULL
&& strstr((char *)vimvars[VV_EXCEPTION].vv_str, (char *)error) == NULL)
{
prepare_assert_error(&ga);
fill_assert_error(&ga, &argvars[1], NULL, &argvars[0],
&vimvars[VV_EXCEPTION].vv_tv, ASSERT_OTHER);
assert_error(&ga);
ga_clear(&ga);
}
}
void
assert_fails(typval_T *argvars)
{
char_u *cmd = get_tv_string_chk(&argvars[0]);
garray_T ga;
called_emsg = FALSE;
suppress_errthrow = TRUE;
emsg_silent = TRUE;
do_cmdline_cmd(cmd);
if (!called_emsg)
{
prepare_assert_error(&ga);
ga_concat(&ga, (char_u *)"command did not fail: ");
ga_concat(&ga, cmd);
assert_error(&ga);
ga_clear(&ga);
}
else if (argvars[1].v_type != VAR_UNKNOWN)
{
char_u buf[NUMBUFLEN];
char *error = (char *)get_tv_string_buf_chk(&argvars[1], buf);
if (error == NULL
|| strstr((char *)vimvars[VV_ERRMSG].vv_str, error) == NULL)
{
prepare_assert_error(&ga);
fill_assert_error(&ga, &argvars[2], NULL, &argvars[1],
&vimvars[VV_ERRMSG].vv_tv, ASSERT_OTHER);
assert_error(&ga);
ga_clear(&ga);
}
}
called_emsg = FALSE;
suppress_errthrow = FALSE;
emsg_silent = FALSE;
emsg_on_display = FALSE;
set_vim_var_string(VV_ERRMSG, NULL, 0);
}
/*
* Append "str" to "gap", escaping unprintable characters.
* Changes NL to \n, CR to \r, etc.
*/
static void
ga_concat_esc(garray_T *gap, char_u *str)
{
char_u *p;
char_u buf[NUMBUFLEN];
if (str == NULL)
{
ga_concat(gap, (char_u *)"NULL");
return;
}
for (p = str; *p != NUL; ++p)
switch (*p)
{
case BS: ga_concat(gap, (char_u *)"\\b"); break;
case ESC: ga_concat(gap, (char_u *)"\\e"); break;
case FF: ga_concat(gap, (char_u *)"\\f"); break;
case NL: ga_concat(gap, (char_u *)"\\n"); break;
case TAB: ga_concat(gap, (char_u *)"\\t"); break;
case CAR: ga_concat(gap, (char_u *)"\\r"); break;
case '\\': ga_concat(gap, (char_u *)"\\\\"); break;
default:
if (*p < ' ')
{
vim_snprintf((char *)buf, NUMBUFLEN, "\\x%02x", *p);
ga_concat(gap, buf);
}
else
ga_append(gap, *p);
break;
}
}
/*
* Fill "gap" with information about an assert error.
*/
void
fill_assert_error(
garray_T *gap,
typval_T *opt_msg_tv,
char_u *exp_str,
typval_T *exp_tv,
typval_T *got_tv,
assert_type_T atype)
{
char_u numbuf[NUMBUFLEN];
char_u *tofree;
if (opt_msg_tv->v_type != VAR_UNKNOWN)
{
ga_concat(gap, tv2string(opt_msg_tv, &tofree, numbuf, 0));
vim_free(tofree);
}
else
{
if (atype == ASSERT_MATCH || atype == ASSERT_NOTMATCH)
ga_concat(gap, (char_u *)"Pattern ");
else
ga_concat(gap, (char_u *)"Expected ");
if (exp_str == NULL)
{
ga_concat_esc(gap, tv2string(exp_tv, &tofree, numbuf, 0));
vim_free(tofree);
}
else
ga_concat_esc(gap, exp_str);
if (atype == ASSERT_MATCH)
ga_concat(gap, (char_u *)" does not match ");
else if (atype == ASSERT_NOTMATCH)
ga_concat(gap, (char_u *)" does match ");
else if (atype == ASSERT_NOTEQUAL)
ga_concat(gap, (char_u *)" differs from ");
else
ga_concat(gap, (char_u *)" but got ");
ga_concat_esc(gap, tv2string(got_tv, &tofree, numbuf, 0));
vim_free(tofree);
}
}
#endif /* FEAT_EVAL */
#if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
#ifdef WIN3264
/*
* Functions for ":8" filename modifier: get 8.3 version of a filename.
*/
static int get_short_pathname(char_u **fnamep, char_u **bufp, int *fnamelen);
static int shortpath_for_invalid_fname(char_u **fname, char_u **bufp, int *fnamelen);
static int shortpath_for_partial(char_u **fnamep, char_u **bufp, int *fnamelen);
/*
* Get the short path (8.3) for the filename in "fnamep".
* Only works for a valid file name.
* When the path gets longer "fnamep" is changed and the allocated buffer
* is put in "bufp".
* *fnamelen is the length of "fnamep" and set to 0 for a nonexistent path.
* Returns OK on success, FAIL on failure.
*/
static int
get_short_pathname(char_u **fnamep, char_u **bufp, int *fnamelen)
{
int l, len;
char_u *newbuf;
len = *fnamelen;
l = GetShortPathName((LPSTR)*fnamep, (LPSTR)*fnamep, len);
if (l > len - 1)
{
/* If that doesn't work (not enough space), then save the string
* and try again with a new buffer big enough. */
newbuf = vim_strnsave(*fnamep, l);
if (newbuf == NULL)
return FAIL;
vim_free(*bufp);
*fnamep = *bufp = newbuf;
/* Really should always succeed, as the buffer is big enough. */
l = GetShortPathName((LPSTR)*fnamep, (LPSTR)*fnamep, l+1);
}
*fnamelen = l;
return OK;
}
/*
* Get the short path (8.3) for the filename in "fname". The converted
* path is returned in "bufp".
*
* Some of the directories specified in "fname" may not exist. This function
* will shorten the existing directories at the beginning of the path and then
* append the remaining non-existing path.
*
* fname - Pointer to the filename to shorten. On return, contains the
* pointer to the shortened pathname
* bufp - Pointer to an allocated buffer for the filename.
* fnamelen - Length of the filename pointed to by fname
*
* Returns OK on success (or nothing done) and FAIL on failure (out of memory).
*/
static int
shortpath_for_invalid_fname(
char_u **fname,
char_u **bufp,
int *fnamelen)
{
char_u *short_fname, *save_fname, *pbuf_unused;
char_u *endp, *save_endp;
char_u ch;
int old_len, len;
int new_len, sfx_len;
int retval = OK;
/* Make a copy */
old_len = *fnamelen;
save_fname = vim_strnsave(*fname, old_len);
pbuf_unused = NULL;
short_fname = NULL;
endp = save_fname + old_len - 1; /* Find the end of the copy */
save_endp = endp;
/*
* Try shortening the supplied path till it succeeds by removing one
* directory at a time from the tail of the path.
*/
len = 0;
for (;;)
{
/* go back one path-separator */
while (endp > save_fname && !after_pathsep(save_fname, endp + 1))
--endp;
if (endp <= save_fname)
break; /* processed the complete path */
/*
* Replace the path separator with a NUL and try to shorten the
* resulting path.
*/
ch = *endp;
*endp = 0;
short_fname = save_fname;
len = (int)STRLEN(short_fname) + 1;
if (get_short_pathname(&short_fname, &pbuf_unused, &len) == FAIL)
{
retval = FAIL;
goto theend;
}
*endp = ch; /* preserve the string */
if (len > 0)
break; /* successfully shortened the path */
/* failed to shorten the path. Skip the path separator */
--endp;
}
if (len > 0)
{
/*
* Succeeded in shortening the path. Now concatenate the shortened
* path with the remaining path at the tail.
*/
/* Compute the length of the new path. */
sfx_len = (int)(save_endp - endp) + 1;
new_len = len + sfx_len;
*fnamelen = new_len;
vim_free(*bufp);
if (new_len > old_len)
{
/* There is not enough space in the currently allocated string,
* copy it to a buffer big enough. */
*fname = *bufp = vim_strnsave(short_fname, new_len);
if (*fname == NULL)
{
retval = FAIL;
goto theend;
}
}
else
{
/* Transfer short_fname to the main buffer (it's big enough),
* unless get_short_pathname() did its work in-place. */
*fname = *bufp = save_fname;
if (short_fname != save_fname)
vim_strncpy(save_fname, short_fname, len);
save_fname = NULL;
}
/* concat the not-shortened part of the path */
vim_strncpy(*fname + len, endp, sfx_len);
(*fname)[new_len] = NUL;
}
theend:
vim_free(pbuf_unused);
vim_free(save_fname);
return retval;
}
/*
* Get a pathname for a partial path.
* Returns OK for success, FAIL for failure.
*/
static int
shortpath_for_partial(
char_u **fnamep,
char_u **bufp,
int *fnamelen)
{
int sepcount, len, tflen;
char_u *p;
char_u *pbuf, *tfname;
int hasTilde;
/* Count up the path separators from the RHS.. so we know which part
* of the path to return. */
sepcount = 0;
for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
if (vim_ispathsep(*p))
++sepcount;
/* Need full path first (use expand_env() to remove a "~/") */
hasTilde = (**fnamep == '~');
if (hasTilde)
pbuf = tfname = expand_env_save(*fnamep);
else
pbuf = tfname = FullName_save(*fnamep, FALSE);
len = tflen = (int)STRLEN(tfname);
if (get_short_pathname(&tfname, &pbuf, &len) == FAIL)
return FAIL;
if (len == 0)
{
/* Don't have a valid filename, so shorten the rest of the
* path if we can. This CAN give us invalid 8.3 filenames, but
* there's not a lot of point in guessing what it might be.
*/
len = tflen;
if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == FAIL)
return FAIL;
}
/* Count the paths backward to find the beginning of the desired string. */
for (p = tfname + len - 1; p >= tfname; --p)
{
#ifdef FEAT_MBYTE
if (has_mbyte)
p -= mb_head_off(tfname, p);
#endif
if (vim_ispathsep(*p))
{
if (sepcount == 0 || (hasTilde && sepcount == 1))
break;
else
sepcount --;
}
}
if (hasTilde)
{
--p;
if (p >= tfname)
*p = '~';
else
return FAIL;
}
else
++p;
/* Copy in the string - p indexes into tfname - allocated at pbuf */
vim_free(*bufp);
*fnamelen = (int)STRLEN(p);
*bufp = pbuf;
*fnamep = p;
return OK;
}
#endif /* WIN3264 */
/*
* Adjust a filename, according to a string of modifiers.
* *fnamep must be NUL terminated when called. When returning, the length is
* determined by *fnamelen.
* Returns VALID_ flags or -1 for failure.
* When there is an error, *fnamep is set to NULL.
*/
int
modify_fname(
char_u *src, /* string with modifiers */
int *usedlen, /* characters after src that are used */
char_u **fnamep, /* file name so far */
char_u **bufp, /* buffer for allocated file name or NULL */
int *fnamelen) /* length of fnamep */
{
int valid = 0;
char_u *tail;
char_u *s, *p, *pbuf;
char_u dirname[MAXPATHL];
int c;
int has_fullname = 0;
#ifdef WIN3264
char_u *fname_start = *fnamep;
int has_shortname = 0;
#endif
repeat:
/* ":p" - full path/file_name */
if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
{
has_fullname = 1;
valid |= VALID_PATH;
*usedlen += 2;
/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
if ((*fnamep)[0] == '~'
#if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
&& ((*fnamep)[1] == '/'
# ifdef BACKSLASH_IN_FILENAME
|| (*fnamep)[1] == '\\'
# endif
|| (*fnamep)[1] == NUL)
#endif
)
{
*fnamep = expand_env_save(*fnamep);
vim_free(*bufp); /* free any allocated file name */
*bufp = *fnamep;
if (*fnamep == NULL)
return -1;
}
/* When "/." or "/.." is used: force expansion to get rid of it. */
for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
{
if (vim_ispathsep(*p)
&& p[1] == '.'
&& (p[2] == NUL
|| vim_ispathsep(p[2])
|| (p[2] == '.'
&& (p[3] == NUL || vim_ispathsep(p[3])))))
break;
}
/* FullName_save() is slow, don't use it when not needed. */
if (*p != NUL || !vim_isAbsName(*fnamep))
{
*fnamep = FullName_save(*fnamep, *p != NUL);
vim_free(*bufp); /* free any allocated file name */
*bufp = *fnamep;
if (*fnamep == NULL)
return -1;
}
#ifdef WIN3264
# if _WIN32_WINNT >= 0x0500
if (vim_strchr(*fnamep, '~') != NULL)
{
/* Expand 8.3 filename to full path. Needed to make sure the same
* file does not have two different names.
* Note: problem does not occur if _WIN32_WINNT < 0x0500. */
p = alloc(_MAX_PATH + 1);
if (p != NULL)
{
if (GetLongPathName((LPSTR)*fnamep, (LPSTR)p, _MAX_PATH))
{
vim_free(*bufp);
*bufp = *fnamep = p;
}
else
vim_free(p);
}
}
# endif
#endif
/* Append a path separator to a directory. */
if (mch_isdir(*fnamep))
{
/* Make room for one or two extra characters. */
*fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
vim_free(*bufp); /* free any allocated file name */
*bufp = *fnamep;
if (*fnamep == NULL)
return -1;
add_pathsep(*fnamep);
}
}
/* ":." - path relative to the current directory */
/* ":~" - path relative to the home directory */
/* ":8" - shortname path - postponed till after */
while (src[*usedlen] == ':'
&& ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
{
*usedlen += 2;
if (c == '8')
{
#ifdef WIN3264
has_shortname = 1; /* Postpone this. */
#endif
continue;
}
pbuf = NULL;
/* Need full path first (use expand_env() to remove a "~/") */
if (!has_fullname)
{
if (c == '.' && **fnamep == '~')
p = pbuf = expand_env_save(*fnamep);
else
p = pbuf = FullName_save(*fnamep, FALSE);
}
else
p = *fnamep;
has_fullname = 0;
if (p != NULL)
{
if (c == '.')
{
mch_dirname(dirname, MAXPATHL);
s = shorten_fname(p, dirname);
if (s != NULL)
{
*fnamep = s;
if (pbuf != NULL)
{
vim_free(*bufp); /* free any allocated file name */
*bufp = pbuf;
pbuf = NULL;
}
}
}
else
{
home_replace(NULL, p, dirname, MAXPATHL, TRUE);
/* Only replace it when it starts with '~' */
if (*dirname == '~')
{
s = vim_strsave(dirname);
if (s != NULL)
{
*fnamep = s;
vim_free(*bufp);
*bufp = s;
}
}
}
vim_free(pbuf);
}
}
tail = gettail(*fnamep);
*fnamelen = (int)STRLEN(*fnamep);
/* ":h" - head, remove "/file_name", can be repeated */
/* Don't remove the first "/" or "c:\" */
while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
{
valid |= VALID_HEAD;
*usedlen += 2;
s = get_past_head(*fnamep);
while (tail > s && after_pathsep(s, tail))
mb_ptr_back(*fnamep, tail);
*fnamelen = (int)(tail - *fnamep);
#ifdef VMS
if (*fnamelen > 0)
*fnamelen += 1; /* the path separator is part of the path */
#endif
if (*fnamelen == 0)
{
/* Result is empty. Turn it into "." to make ":cd %:h" work. */
p = vim_strsave((char_u *)".");
if (p == NULL)
return -1;
vim_free(*bufp);
*bufp = *fnamep = tail = p;
*fnamelen = 1;
}
else
{
while (tail > s && !after_pathsep(s, tail))
mb_ptr_back(*fnamep, tail);
}
}
/* ":8" - shortname */
if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
{
*usedlen += 2;
#ifdef WIN3264
has_shortname = 1;
#endif
}
#ifdef WIN3264
/*
* Handle ":8" after we have done 'heads' and before we do 'tails'.
*/
if (has_shortname)
{
/* Copy the string if it is shortened by :h and when it wasn't copied
* yet, because we are going to change it in place. Avoids changing
* the buffer name for "%:8". */
if (*fnamelen < (int)STRLEN(*fnamep) || *fnamep == fname_start)
{
p = vim_strnsave(*fnamep, *fnamelen);
if (p == NULL)
return -1;
vim_free(*bufp);
*bufp = *fnamep = p;
}
/* Split into two implementations - makes it easier. First is where
* there isn't a full name already, second is where there is. */
if (!has_fullname && !vim_isAbsName(*fnamep))
{
if (shortpath_for_partial(fnamep, bufp, fnamelen) == FAIL)
return -1;
}
else
{
int l = *fnamelen;
/* Simple case, already have the full-name.
* Nearly always shorter, so try first time. */
if (get_short_pathname(fnamep, bufp, &l) == FAIL)
return -1;
if (l == 0)
{
/* Couldn't find the filename, search the paths. */
l = *fnamelen;
if (shortpath_for_invalid_fname(fnamep, bufp, &l) == FAIL)
return -1;
}
*fnamelen = l;
}
}
#endif /* WIN3264 */
/* ":t" - tail, just the basename */
if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
{
*usedlen += 2;
*fnamelen -= (int)(tail - *fnamep);
*fnamep = tail;
}
/* ":e" - extension, can be repeated */
/* ":r" - root, without extension, can be repeated */
while (src[*usedlen] == ':'
&& (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
{
/* find a '.' in the tail:
* - for second :e: before the current fname
* - otherwise: The last '.'
*/
if (src[*usedlen + 1] == 'e' && *fnamep > tail)
s = *fnamep - 2;
else
s = *fnamep + *fnamelen - 1;
for ( ; s > tail; --s)
if (s[0] == '.')
break;
if (src[*usedlen + 1] == 'e') /* :e */
{
if (s > tail)
{
*fnamelen += (int)(*fnamep - (s + 1));
*fnamep = s + 1;
#ifdef VMS
/* cut version from the extension */
s = *fnamep + *fnamelen - 1;
for ( ; s > *fnamep; --s)
if (s[0] == ';')
break;
if (s > *fnamep)
*fnamelen = s - *fnamep;
#endif
}
else if (*fnamep <= tail)
*fnamelen = 0;
}
else /* :r */
{
if (s > tail) /* remove one extension */
*fnamelen = (int)(s - *fnamep);
}
*usedlen += 2;
}
/* ":s?pat?foo?" - substitute */
/* ":gs?pat?foo?" - global substitute */
if (src[*usedlen] == ':'
&& (src[*usedlen + 1] == 's'
|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
{
char_u *str;
char_u *pat;
char_u *sub;
int sep;
char_u *flags;
int didit = FALSE;
flags = (char_u *)"";
s = src + *usedlen + 2;
if (src[*usedlen + 1] == 'g')
{
flags = (char_u *)"g";
++s;
}
sep = *s++;
if (sep)
{
/* find end of pattern */
p = vim_strchr(s, sep);
if (p != NULL)
{
pat = vim_strnsave(s, (int)(p - s));
if (pat != NULL)
{
s = p + 1;
/* find end of substitution */
p = vim_strchr(s, sep);
if (p != NULL)
{
sub = vim_strnsave(s, (int)(p - s));
str = vim_strnsave(*fnamep, *fnamelen);
if (sub != NULL && str != NULL)
{
*usedlen = (int)(p + 1 - src);
s = do_string_sub(str, pat, sub, NULL, flags);
if (s != NULL)
{
*fnamep = s;
*fnamelen = (int)STRLEN(s);
vim_free(*bufp);
*bufp = s;
didit = TRUE;
}
}
vim_free(sub);
vim_free(str);
}
vim_free(pat);
}
}
/* after using ":s", repeat all the modifiers */
if (didit)
goto repeat;
}
}
if (src[*usedlen] == ':' && src[*usedlen + 1] == 'S')
{
/* vim_strsave_shellescape() needs a NUL terminated string. */
c = (*fnamep)[*fnamelen];
if (c != NUL)
(*fnamep)[*fnamelen] = NUL;
p = vim_strsave_shellescape(*fnamep, FALSE, FALSE);
if (c != NUL)
(*fnamep)[*fnamelen] = c;
if (p == NULL)
return -1;
vim_free(*bufp);
*bufp = *fnamep = p;
*fnamelen = (int)STRLEN(p);
*usedlen += 2;
}
return valid;
}
/*
* Perform a substitution on "str" with pattern "pat" and substitute "sub".
* When "sub" is NULL "expr" is used, must be a VAR_FUNC or VAR_PARTIAL.
* "flags" can be "g" to do a global substitute.
* Returns an allocated string, NULL for error.
*/
char_u *
do_string_sub(
char_u *str,
char_u *pat,
char_u *sub,
typval_T *expr,
char_u *flags)
{
int sublen;
regmatch_T regmatch;
int i;
int do_all;
char_u *tail;
char_u *end;
garray_T ga;
char_u *ret;
char_u *save_cpo;
char_u *zero_width = NULL;
/* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
save_cpo = p_cpo;
p_cpo = empty_option;
ga_init2(&ga, 1, 200);
do_all = (flags[0] == 'g');
regmatch.rm_ic = p_ic;
regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
if (regmatch.regprog != NULL)
{
tail = str;
end = str + STRLEN(str);
while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
{
/* Skip empty match except for first match. */
if (regmatch.startp[0] == regmatch.endp[0])
{
if (zero_width == regmatch.startp[0])
{
/* avoid getting stuck on a match with an empty string */
i = MB_PTR2LEN(tail);
mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail,
(size_t)i);
ga.ga_len += i;
tail += i;
continue;
}
zero_width = regmatch.startp[0];
}
/*
* Get some space for a temporary buffer to do the substitution
* into. It will contain:
* - The text up to where the match is.
* - The substituted text.
* - The text after the match.
*/
sublen = vim_regsub(&regmatch, sub, expr, tail, FALSE, TRUE, FALSE);
if (ga_grow(&ga, (int)((end - tail) + sublen -
(regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
{
ga_clear(&ga);
break;
}
/* copy the text up to where the match is */
i = (int)(regmatch.startp[0] - tail);
mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
/* add the substituted text */
(void)vim_regsub(&regmatch, sub, expr, (char_u *)ga.ga_data
+ ga.ga_len + i, TRUE, TRUE, FALSE);
ga.ga_len += i + sublen - 1;
tail = regmatch.endp[0];
if (*tail == NUL)
break;
if (!do_all)
break;
}
if (ga.ga_data != NULL)
STRCPY((char *)ga.ga_data + ga.ga_len, tail);
vim_regfree(regmatch.regprog);
}
ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
ga_clear(&ga);
if (p_cpo == empty_option)
p_cpo = save_cpo;
else
/* Darn, evaluating {sub} expression or {expr} changed the value. */
free_string_option(save_cpo);
return ret;
}
static int
filter_map_one(typval_T *tv, typval_T *expr, int map, int *remp)
{
typval_T rettv;
typval_T argv[3];
char_u buf[NUMBUFLEN];
char_u *s;
int retval = FAIL;
int dummy;
copy_tv(tv, &vimvars[VV_VAL].vv_tv);
argv[0] = vimvars[VV_KEY].vv_tv;
argv[1] = vimvars[VV_VAL].vv_tv;
if (expr->v_type == VAR_FUNC)
{
s = expr->vval.v_string;
if (call_func(s, (int)STRLEN(s), &rettv, 2, argv, NULL,
0L, 0L, &dummy, TRUE, NULL, NULL) == FAIL)
goto theend;
}
else if (expr->v_type == VAR_PARTIAL)
{
partial_T *partial = expr->vval.v_partial;
s = partial_name(partial);
if (call_func(s, (int)STRLEN(s), &rettv, 2, argv, NULL,
0L, 0L, &dummy, TRUE, partial, NULL) == FAIL)
goto theend;
}
else
{
s = get_tv_string_buf_chk(expr, buf);
if (s == NULL)
goto theend;
s = skipwhite(s);
if (eval1(&s, &rettv, TRUE) == FAIL)
goto theend;
if (*s != NUL) /* check for trailing chars after expr */
{
EMSG2(_(e_invexpr2), s);
goto theend;
}
}
if (map)
{
/* map(): replace the list item value */
clear_tv(tv);
rettv.v_lock = 0;
*tv = rettv;
}
else
{
int error = FALSE;
/* filter(): when expr is zero remove the item */
*remp = (get_tv_number_chk(&rettv, &error) == 0);
clear_tv(&rettv);
/* On type error, nothing has been removed; return FAIL to stop the
* loop. The error message was given by get_tv_number_chk(). */
if (error)
goto theend;
}
retval = OK;
theend:
clear_tv(&vimvars[VV_VAL].vv_tv);
return retval;
}
/*
* Implementation of map() and filter().
*/
void
filter_map(typval_T *argvars, typval_T *rettv, int map)
{
typval_T *expr;
listitem_T *li, *nli;
list_T *l = NULL;
dictitem_T *di;
hashtab_T *ht;
hashitem_T *hi;
dict_T *d = NULL;
typval_T save_val;
typval_T save_key;
int rem;
int todo;
char_u *ermsg = (char_u *)(map ? "map()" : "filter()");
char_u *arg_errmsg = (char_u *)(map ? N_("map() argument")
: N_("filter() argument"));
int save_did_emsg;
int idx = 0;
if (argvars[0].v_type == VAR_LIST)
{
if ((l = argvars[0].vval.v_list) == NULL
|| (!map && tv_check_lock(l->lv_lock, arg_errmsg, TRUE)))
return;
}
else if (argvars[0].v_type == VAR_DICT)
{
if ((d = argvars[0].vval.v_dict) == NULL
|| (!map && tv_check_lock(d->dv_lock, arg_errmsg, TRUE)))
return;
}
else
{
EMSG2(_(e_listdictarg), ermsg);
return;
}
expr = &argvars[1];
/* On type errors, the preceding call has already displayed an error
* message. Avoid a misleading error message for an empty string that
* was not passed as argument. */
if (expr->v_type != VAR_UNKNOWN)
{
prepare_vimvar(VV_VAL, &save_val);
/* We reset "did_emsg" to be able to detect whether an error
* occurred during evaluation of the expression. */
save_did_emsg = did_emsg;
did_emsg = FALSE;
prepare_vimvar(VV_KEY, &save_key);
if (argvars[0].v_type == VAR_DICT)
{
vimvars[VV_KEY].vv_type = VAR_STRING;
ht = &d->dv_hashtab;
hash_lock(ht);
todo = (int)ht->ht_used;
for (hi = ht->ht_array; todo > 0; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
int r;
--todo;
di = HI2DI(hi);
if (map &&
(tv_check_lock(di->di_tv.v_lock, arg_errmsg, TRUE)
|| var_check_ro(di->di_flags, arg_errmsg, TRUE)))
break;
vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
r = filter_map_one(&di->di_tv, expr, map, &rem);
clear_tv(&vimvars[VV_KEY].vv_tv);
if (r == FAIL || did_emsg)
break;
if (!map && rem)
{
if (var_check_fixed(di->di_flags, arg_errmsg, TRUE)
|| var_check_ro(di->di_flags, arg_errmsg, TRUE))
break;
dictitem_remove(d, di);
}
}
}
hash_unlock(ht);
}
else
{
vimvars[VV_KEY].vv_type = VAR_NUMBER;
for (li = l->lv_first; li != NULL; li = nli)
{
if (map && tv_check_lock(li->li_tv.v_lock, arg_errmsg, TRUE))
break;
nli = li->li_next;
vimvars[VV_KEY].vv_nr = idx;
if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL
|| did_emsg)
break;
if (!map && rem)
listitem_remove(l, li);
++idx;
}
}
restore_vimvar(VV_KEY, &save_key);
restore_vimvar(VV_VAL, &save_val);
did_emsg |= save_did_emsg;
}
copy_tv(&argvars[0], rettv);
}
#endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */