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fuchsia/third_party/swig/725bc081da170662b194ca1ff5e7e75144bc0760/./Source/Preprocessor/cpp.c
blob: d84708d07a0b19e48be374811209e2d1b41bd617 [file]
/* -----------------------------------------------------------------------------
* This file is part of SWIG, which is licensed as a whole under version 3
* (or any later version) of the GNU General Public License. Some additional
* terms also apply to certain portions of SWIG. The full details of the SWIG
* license and copyrights can be found in the LICENSE and COPYRIGHT files
* included with the SWIG source code as distributed by the SWIG developers
* and at https://www.swig.org/legal.html.
*
* cpp.c
*
* An implementation of a C preprocessor plus some support for additional
* SWIG directives.
*
* - SWIG directives such as %include and %import are handled
* - A new macro %define ... %enddef can be used for multiline macros
* - No preprocessing is performed in %{ ... %} blocks
* - Lines beginning with %# are stripped down to #... and passed through.
* ----------------------------------------------------------------------------- */
#include "swig.h"
#include "preprocessor.h"
#include <ctype.h>
static Hash *cpp = 0; /* C preprocessor data */
static int include_all = 0; /* Follow all includes */
static int ignore_missing = 0;
static int import_all = 0; /* Follow all includes, but as %import statements */
static int imported_depth = 0; /* Depth of %imported files */
static int single_include = 1; /* Only include each file once */
static Hash *included_files = 0;
static List *dependencies = 0;
static Scanner *id_scan = 0;
static int error_as_warning = 0; /* Understand the cpp #error directive as a special #warning */
static int expand_defined_operator = 0;
static int macro_level = 0;
static int macro_start_line = 0;
static const String *macro_start_file = 0;
/* Test a character to see if it starts an identifier */
#define isidentifier(c) ((isalpha(c)) || (c == '_') || (c == '$'))
/* Test a character to see if it valid in an identifier (after the first letter) */
#define isidchar(c) ((isalnum(c)) || (c == '_') || (c == '$'))
static DOH *Preprocessor_replace(DOH *, DOH *);
/* Skip whitespace */
static void skip_whitespace(String *s, String *out) {
int c;
while ((c = Getc(s)) != EOF) {
if (!isspace(c)) {
Ungetc(c, s);
break;
} else if (out)
Putc(c, out);
}
}
/* Skip to a specified character taking line breaks into account */
static int skip_tochar(String *s, int ch, String *out) {
int c;
while ((c = Getc(s)) != EOF) {
if (out)
Putc(c, out);
if (c == ch)
break;
if (c == '\\') {
c = Getc(s);
if ((c != EOF) && (out))
Putc(c, out);
}
}
if (c == EOF)
return -1;
return 0;
}
/* Skip to a specified character or the end of the line */
static int skip_tochar_or_eol(String *s, int ch, String *out) {
int c;
while ((c = Getc(s)) != EOF) {
if (c == '\n') {
Ungetc(c, s);
break;
}
if (out)
Putc(c, out);
if (c == ch)
break;
if (c == '\\') {
c = Getc(s);
if ((c != EOF) && (out))
Putc(c, out);
}
}
if (c == EOF)
return -1;
return 0;
}
static void copy_location(const DOH *s1, DOH *s2) {
Setfile(s2, Getfile((DOH *)s1));
Setline(s2, Getline((DOH *)s1));
}
static String *cpp_include(const_String_or_char_ptr fn, int sysfile) {
String *s = sysfile ? Swig_include_sys(fn) : Swig_include(fn);
if (s && single_include) {
String *file = Getfile(s);
if (Getattr(included_files, file)) {
Delete(s);
return 0;
}
Setattr(included_files, file, file);
}
if (!s) {
if (ignore_missing) {
Swig_warning(WARN_PP_MISSING_FILE, Getfile(fn), Getline(fn), "Unable to find '%s'\n", fn);
} else {
Swig_error(Getfile(fn), Getline(fn), "Unable to find '%s'\n", fn);
}
} else {
String *lf;
Seek(s, 0, SEEK_SET);
if (!dependencies) {
dependencies = NewList();
}
lf = Copy(Swig_last_file());
Append(dependencies, lf);
Delete(lf);
}
return s;
}
static int is_digits(const String *str) {
const char *s = Char(str);
int isdigits = (*s != 0);
while (*s) {
if (!isdigit((int)*s)) {
isdigits = 0;
break;
}
s++;
}
return isdigits;
}
List *Preprocessor_depend(void) {
return dependencies;
}
/* -----------------------------------------------------------------------------
* void Preprocessor_cpp_init() - Initialize the preprocessor
* ----------------------------------------------------------------------------- */
static String *kpp_args = 0;
static String *kpp_define = 0;
static String *kpp_defined = 0;
static String *kpp_elif = 0;
static String *kpp_else = 0;
static String *kpp_endif = 0;
static String *kpp_expanded = 0;
static String *kpp_if = 0;
static String *kpp_ifdef = 0;
static String *kpp_ifndef = 0;
static String *kpp_name = 0;
static String *kpp_swigmacro = 0;
static String *kpp_symbols = 0;
static String *kpp_undef = 0;
static String *kpp_value = 0;
static String *kpp_varargs = 0;
static String *kpp_error = 0;
static String *kpp_warning = 0;
static String *kpp_line = 0;
static String *kpp_include = 0;
static String *kpp_pragma = 0;
static String *kpp_level = 0;
static String *kpp_dline = 0;
static String *kpp_ddefine = 0;
static String *kpp_dinclude = 0;
static String *kpp_dimport = 0;
static String *kpp_dbeginfile = 0;
static String *kpp_LINE = 0;
static String *kpp_FILE = 0;
static String *kpp_hash_if = 0;
static String *kpp_hash_elif = 0;
void Preprocessor_init(void) {
Hash *s;
kpp_args = NewString("args");
kpp_define = NewString("define");
kpp_defined = NewString("defined");
kpp_else = NewString("else");
kpp_elif = NewString("elif");
kpp_endif = NewString("endif");
kpp_expanded = NewString("*expanded*");
kpp_if = NewString("if");
kpp_ifdef = NewString("ifdef");
kpp_ifndef = NewString("ifndef");
kpp_name = NewString("name");
kpp_swigmacro = NewString("swigmacro");
kpp_symbols = NewString("symbols");
kpp_undef = NewString("undef");
kpp_value = NewString("value");
kpp_error = NewString("error");
kpp_warning = NewString("warning");
kpp_pragma = NewString("pragma");
kpp_level = NewString("level");
kpp_line = NewString("line");
kpp_include = NewString("include");
kpp_varargs = NewString("varargs");
kpp_dinclude = NewString("%include");
kpp_dimport = NewString("%import");
kpp_dbeginfile = NewString("%beginfile");
kpp_ddefine = NewString("%define");
kpp_dline = NewString("%line");
kpp_LINE = NewString("__LINE__");
kpp_FILE = NewString("__FILE__");
kpp_hash_if = NewString("#if");
kpp_hash_elif = NewString("#elif");
cpp = NewHash();
s = NewHash();
Setattr(cpp, kpp_symbols, s);
Delete(s);
Preprocessor_expr_init(); /* Initialize the expression evaluator */
included_files = NewHash();
id_scan = NewScanner();
}
void Preprocessor_delete(void) {
Delete(kpp_args);
Delete(kpp_define);
Delete(kpp_defined);
Delete(kpp_else);
Delete(kpp_elif);
Delete(kpp_endif);
Delete(kpp_expanded);
Delete(kpp_if);
Delete(kpp_ifdef);
Delete(kpp_ifndef);
Delete(kpp_name);
Delete(kpp_swigmacro);
Delete(kpp_symbols);
Delete(kpp_undef);
Delete(kpp_value);
Delete(kpp_error);
Delete(kpp_warning);
Delete(kpp_pragma);
Delete(kpp_level);
Delete(kpp_line);
Delete(kpp_include);
Delete(kpp_varargs);
Delete(kpp_dinclude);
Delete(kpp_dimport);
Delete(kpp_dbeginfile);
Delete(kpp_ddefine);
Delete(kpp_dline);
Delete(kpp_LINE);
Delete(kpp_FILE);
Delete(kpp_hash_if);
Delete(kpp_hash_elif);
Delete(cpp);
Delete(included_files);
Preprocessor_expr_delete();
DelScanner(id_scan);
Delete(dependencies);
Delete(Swig_add_directory(0));
}
/* -----------------------------------------------------------------------------
* void Preprocessor_include_all() - Instruct preprocessor to include all files
* ----------------------------------------------------------------------------- */
void Preprocessor_include_all(int a) {
include_all = a;
}
void Preprocessor_import_all(int a) {
import_all = a;
}
void Preprocessor_ignore_missing(int a) {
ignore_missing = a;
}
void Preprocessor_error_as_warning(int a) {
error_as_warning = a;
}
/* -----------------------------------------------------------------------------
* Preprocessor_define()
*
* Defines a new C preprocessor symbol. swigmacro specifies whether or not the macro has
* SWIG macro semantics.
* ----------------------------------------------------------------------------- */
static String *Macro_vararg_name(const_String_or_char_ptr str, const_String_or_char_ptr line) {
String *varargname;
char *s, *dots;
s = Char(str);
dots = strchr(s, '.');
if (!dots) {
return NULL;
}
if (strcmp(dots, "...") != 0) {
Swig_error(Getfile(line), Getline(line), "Illegal macro argument name '%s'\n", str);
return NULL;
}
if (dots == s) {
varargname = NewString("__VA_ARGS__");
} else {
varargname = NewStringWithSize(s, (int)(dots - s));
}
return varargname;
}
Hash *Preprocessor_define(const_String_or_char_ptr _str, int swigmacro) {
String *macroname = 0, *argstr = 0, *macrovalue = 0, *file = 0, *s = 0;
Hash *macro = 0, *symbols = 0, *m1;
List *arglist = 0;
int c, line;
int varargs = 0;
String *str;
assert(cpp);
assert(_str);
/* First make sure that string is actually a string */
if (DohCheck(_str)) {
s = Copy(_str);
copy_location(_str, s);
str = s;
} else {
str = NewString((char *)_str);
}
Seek(str, 0, SEEK_SET);
line = Getline(str);
file = Getfile(str);
/* Skip over any leading whitespace */
skip_whitespace(str, 0);
/* Now look for a macro name */
macroname = NewStringEmpty();
copy_location(str, macroname);
while ((c = Getc(str)) != EOF) {
if (c == '(') {
argstr = NewStringEmpty();
copy_location(str, argstr);
/* It is a macro. Go extract its argument string */
while ((c = Getc(str)) != EOF) {
if (c == ')')
break;
else
Putc(c, argstr);
}
if (c != ')') {
Swig_error(Getfile(argstr), Getline(argstr), "Missing \')\' in macro parameters\n");
goto macro_error;
}
break;
} else if (isidchar(c) || (c == '%')) {
Putc(c, macroname);
} else if (isspace(c)) {
break;
} else if (c == '\\') {
c = Getc(str);
if (c != '\n') {
Ungetc(c, str);
Ungetc('\\', str);
break;
}
} else {
Ungetc(c, str);
break;
}
}
if (!swigmacro)
skip_whitespace(str, 0);
macrovalue = NewStringEmpty();
copy_location(str, macrovalue);
while ((c = Getc(str)) != EOF) {
Putc(c, macrovalue);
}
/* If there are any macro arguments, convert into a list */
if (argstr) {
String *argname, *varargname;
arglist = NewList();
Seek(argstr, 0, SEEK_SET);
argname = NewStringEmpty();
while ((c = Getc(argstr)) != EOF) {
if (c == ',') {
varargname = Macro_vararg_name(argname, argstr);
if (varargname) {
Delete(varargname);
Swig_error(Getfile(argstr), Getline(argstr), "Variable length macro argument must be last parameter\n");
} else {
Append(arglist, argname);
}
Delete(argname);
argname = NewStringEmpty();
} else if (isidchar(c) || (c == '.')) {
Putc(c, argname);
} else if (!(isspace(c) || (c == '\\'))) {
Delete(argname);
Swig_error(Getfile(argstr), Getline(argstr), "Illegal character in macro argument name\n");
goto macro_error;
}
}
if (Len(argname)) {
/* Check for varargs */
varargname = Macro_vararg_name(argname, argstr);
if (varargname) {
Append(arglist, varargname);
Delete(varargname);
varargs = 1;
} else {
Append(arglist, argname);
}
}
Delete(argname);
}
if (!swigmacro) {
Replace(macrovalue, "\\\n", " ", DOH_REPLACE_NOQUOTE);
}
/* Look for special # substitutions. We only consider # that appears
outside of quotes and comments */
{
int state = 0;
char *cc = Char(macrovalue);
while (*cc) {
switch (state) {
case 0:
if (*cc == '#')
*cc = '\001';
else if (*cc == '/')
state = 10;
else if (*cc == '\'')
state = 20;
else if (*cc == '\"')
state = 30;
break;
case 10:
if (*cc == '*')
state = 11;
else if (*cc == '/')
state = 15;
else {
state = 0;
cc--;
}
break;
case 11:
if (*cc == '*')
state = 12;
break;
case 12:
if (*cc == '/')
state = 0;
else if (*cc != '*')
state = 11;
break;
case 15:
if (*cc == '\n')
state = 0;
break;
case 20:
if (*cc == '\'')
state = 0;
if (*cc == '\\')
state = 21;
break;
case 21:
state = 20;
break;
case 30:
if (*cc == '\"')
state = 0;
if (*cc == '\\')
state = 31;
break;
case 31:
state = 30;
break;
default:
break;
}
cc++;
}
}
/* Get rid of whitespace surrounding # */
/* Replace(macrovalue,"#","\001",DOH_REPLACE_NOQUOTE); */
while (Replace(macrovalue, "\001 ", "\001", DOH_REPLACE_ANY) > 0) {
}
while (Replace(macrovalue, " \001", "\001", DOH_REPLACE_ANY) > 0) {
}
/* Replace '##' with a special token */
Replace(macrovalue, "\001\001", "\002", DOH_REPLACE_ANY);
/* Replace '#@' with a special token */
Replace(macrovalue, "\001@", "\004", DOH_REPLACE_ANY);
/* Replace '##@' with a special token */
Replace(macrovalue, "\002@", "\005", DOH_REPLACE_ANY);
if (varargs) {
/* Replace '__VA_OPT__' with a special token */
Replace(macrovalue, "__VA_OPT__", "\006", DOH_REPLACE_ID | DOH_REPLACE_ANY);
}
/* Go create the macro */
macro = NewHash();
Setattr(macro, kpp_name, macroname);
if (arglist) {
Setattr(macro, kpp_args, arglist);
Delete(arglist);
if (varargs) {
Setattr(macro, kpp_varargs, "1");
}
}
Setattr(macro, kpp_value, macrovalue);
Setline(macro, line);
Setfile(macro, file);
if (swigmacro) {
Setattr(macro, kpp_swigmacro, "1");
}
symbols = Getattr(cpp, kpp_symbols);
if ((m1 = Getattr(symbols, macroname))) {
if (!Checkattr(m1, kpp_value, macrovalue)) {
Swig_error(Getfile(macroname), Getline(macroname), "Macro '%s' redefined,\n", macroname);
Swig_error(Getfile(m1), Getline(m1), "previous definition of '%s'.\n", macroname);
goto macro_error;
}
} else {
Setattr(symbols, macroname, macro);
Delete(macro);
}
Delete(macroname);
Delete(macrovalue);
Delete(str);
Delete(argstr);
return macro;
macro_error:
Delete(str);
Delete(argstr);
Delete(arglist);
Delete(macroname);
Delete(macrovalue);
return 0;
}
/* -----------------------------------------------------------------------------
* Preprocessor_undef()
*
* Undefines a macro.
* ----------------------------------------------------------------------------- */
void Preprocessor_undef(const_String_or_char_ptr str) {
Hash *symbols;
assert(cpp);
symbols = Getattr(cpp, kpp_symbols);
Delattr(symbols, str);
}
/* -----------------------------------------------------------------------------
* Preprocessor_defined()
*
* Check if a macro is defined.
* ----------------------------------------------------------------------------- */
int Preprocessor_defined(const_String_or_char_ptr str) {
Hash *symbols;
assert(cpp);
symbols = Getattr(cpp, kpp_symbols);
return Getattr(symbols, str) != NULL;
}
/* The locator comments that expand_macro() puts round a multiline macro expansion */
typedef enum {
LOCATOR_NONE, /* Not a locator comment */
LOCATOR_START, /* The locator comment before the expansion */
LOCATOR_END /* The locator comment after the expansion */
} LocatorComment;
/* -----------------------------------------------------------------------------
* locator_comment()
*
* Returns which locator comment, if any, the 'len' characters at 'comment' are.
* ----------------------------------------------------------------------------- */
static LocatorComment locator_comment(const char *comment, long len) {
if (len >= 10 && strncmp(comment, "/*@SWIG", 7) == 0 && strncmp(comment + len - 3, "@*/", 3) == 0)
return comment[7] == '@' ? LOCATOR_END : LOCATOR_START;
return LOCATOR_NONE;
}
/* -----------------------------------------------------------------------------
* find_args()
*
* Isolates macro arguments and returns them in a list. For each argument,
* leading and trailing whitespace is stripped (ala K&R, pg. 230).
*
* Comments are stripped too, except for the locator comments round a multiline
* macro expanded in an argument, which keep the lines in the expansion numbered
* from the macro definition. They are stripped from an argument holding a
* locator comment without its partner, as when a ',' in an expansion splits the
* arguments. If 'lines' is not NULL, it is set to the number of lines the
* arguments span, less the lines between locator comments, which are lines in
* the macro definition.
* ----------------------------------------------------------------------------- */
static List *find_args(String *s, int ismacro, String *macro_name, int *lines) {
List *args;
String *str;
String *str_nolocators; /* The argument without any locator comments */
int c, level;
long pos;
int start_line = Getline(s);
int locator_level = 0; /* Nesting level of the locator comments */
int locator_line = 0; /* Line of the outermost start locator comment */
int locator_lines = 0; /* Number of lines within the locator comments */
/* Create a new list */
args = NewList();
copy_location(s, args);
/* First look for a '(' */
pos = Tell(s);
skip_whitespace(s, 0);
/* Now see if the next character is a '(' */
c = Getc(s);
if (c != '(') {
/* Not a macro, bail out now! */
assert(pos != -1);
(void)Seek(s, pos, SEEK_SET);
Delete(args);
if (lines)
*lines = 0;
return 0;
}
c = Getc(s);
/* Okay. This appears to be a macro so we will start isolating arguments */
while (c != EOF) {
int arg_locator_level = 0; /* Locator comment nesting level in this argument */
int arg_locator_unbalanced = 0; /* Set if this argument has an unmatched end locator */
if (isspace(c)) {
skip_whitespace(s, 0); /* Skip leading whitespace */
c = Getc(s);
}
str = NewStringEmpty();
copy_location(s, str);
str_nolocators = NewStringEmpty();
copy_location(s, str_nolocators);
level = 0;
while (c != EOF) {
if (c == '\"' || c == '\'') {
int len = Len(str);
Putc(c, str);
skip_tochar(s, c, str);
Append(str_nolocators, Char(str) + len);
c = Getc(s);
continue;
} else if (c == '/') {
/* Ensure comments are ignored by eating up the characters */
c = Getc(s);
/* Handle / * ... * / type comments (multi-line) */
if (c == '*') {
long start = Tell(s) - 2;
LocatorComment locator;
while ((c = Getc(s)) != EOF) {
if (c == '*') {
another_star:
c = Getc(s);
if (c == '/' || c == EOF)
break;
if (c == '*')
goto another_star;
}
}
locator = locator_comment(Char(s) + start, Tell(s) - start);
if (locator != LOCATOR_NONE) {
String *comment = NewStringWithSize(Char(s) + start, (int)(Tell(s) - start));
Append(str, comment);
Delete(comment);
if (locator == LOCATOR_START) {
if (locator_level++ == 0)
locator_line = Getline(s);
arg_locator_level++;
} else {
if (locator_level > 0 && --locator_level == 0)
locator_lines += Getline(s) - locator_line;
if (arg_locator_level > 0)
arg_locator_level--;
else
arg_locator_unbalanced = 1;
}
}
c = Getc(s);
continue;
}
/* Handle // ... type comments (single-line) */
if (c == '/') {
while ((c = Getc(s)) != EOF) {
if (c == '\n') {
break;
}
}
c = Getc(s);
continue;
}
/* ensure char is available in the stream as this was not a comment*/
Ungetc(c, s);
c = '/';
}
if ((c == ',') && (level == 0))
break;
if ((c == ')') && (level == 0))
break;
Putc(c, str);
Putc(c, str_nolocators);
if (c == '(')
level++;
if (c == ')')
level--;
c = Getc(s);
}
if (level > 0) {
Delete(str);
Delete(str_nolocators);
break;
}
if (arg_locator_level > 0 || arg_locator_unbalanced) {
/* An expansion is split between arguments */
Delete(str);
str = str_nolocators;
} else {
Delete(str_nolocators);
}
Chop(str);
Append(args, str);
Delete(str);
if (c == ')')
break;
c = Getc(s);
}
if (c != ')') {
if (ismacro)
Swig_error(Getfile(args), Getline(args), "Unterminated call invoking macro '%s'\n", macro_name);
else
Swig_error(Getfile(args), Getline(args), "Unterminated call to '%s'\n", macro_name);
}
if (lines) {
if (locator_level > 0)
locator_lines += Getline(s) - locator_line;
*lines = Getline(s) - start_line - locator_lines;
assert(*lines >= 0);
}
return args;
}
/* -----------------------------------------------------------------------------
* DOH *get_filename()
*
* Read a filename from str. A filename can be enclosed in quotes, angle brackets,
* or bare.
* ----------------------------------------------------------------------------- */
static String *get_filename(String *str, int *sysfile) {
String *fn;
int c;
fn = NewStringEmpty();
copy_location(str, fn);
c = Getc(str);
*sysfile = 0;
if (c == '\"') {
while (((c = Getc(str)) != EOF) && (c != '\"'))
Putc(c, fn);
} else if (c == '<') {
*sysfile = 1;
while (((c = Getc(str)) != EOF) && (c != '>'))
Putc(c, fn);
} else {
String *preprocessed_str;
Putc(c, fn);
while (((c = Getc(str)) != EOF) && (!isspace(c)))
Putc(c, fn);
if (isspace(c))
Ungetc(c, str);
preprocessed_str = Preprocessor_replace(fn, NULL);
Seek(preprocessed_str, 0, SEEK_SET);
Delete(fn);
fn = NewStringEmpty();
copy_location(preprocessed_str, fn);
c = Getc(preprocessed_str);
if (c == '\"') {
while (((c = Getc(preprocessed_str)) != EOF) && (c != '\"'))
Putc(c, fn);
} else if (c == '<') {
*sysfile = 1;
while (((c = Getc(preprocessed_str)) != EOF) && (c != '>'))
Putc(c, fn);
} else {
fn = Copy(preprocessed_str);
}
Delete(preprocessed_str);
}
Swig_filename_unescape(fn);
Swig_filename_correct(fn);
Seek(fn, 0, SEEK_SET);
return fn;
}
static String *get_options(String *str) {
int c;
c = Getc(str);
if (c == '(') {
String *opt;
int level = 1;
opt = NewString("(");
while (((c = Getc(str)) != EOF)) {
Putc(c, opt);
switch (c) {
case ')':
level--;
if (!level)
return opt;
break;
case '(':
level++;
break;
case '"':
/* Skip over quoted strings */
while (1) {
c = Getc(str);
if (c == EOF)
goto bad;
Putc(c, opt);
if (c == '"')
break;
if (c == '\\') {
c = Getc(str);
if (c == EOF)
goto bad;
Putc(c, opt);
}
}
break;
}
}
bad:
Delete(opt);
return 0;
} else {
Ungetc(c, str);
return 0;
}
}
/* -----------------------------------------------------------------------------
* expand_macro()
*
* Perform macro expansion and return a new string. Returns NULL if some sort
* of error occurred.
* name - name of the macro
* args - arguments passed to the macro
* line_file - global context, used for line/file name when reporting errors
* ----------------------------------------------------------------------------- */
static String *expand_macro(String *name, List *args, String *line_file) {
String *ns;
DOH *symbols, *macro, *margs, *mvalue, *temp, *tempa, *e;
int i, l;
int isvarargs = 0;
symbols = Getattr(cpp, kpp_symbols);
if (!symbols)
return 0;
/* See if the name is actually defined */
macro = Getattr(symbols, name);
if (!macro)
return 0;
if (macro_level == 0) {
/* Store the start of the macro should the macro contain __LINE__ and __FILE__ for expansion */
macro_start_line = Getline(args ? args : line_file);
macro_start_file = Getfile(args ? args : line_file);
}
macro_level++;
if (Getattr(macro, kpp_expanded)) {
ns = NewStringEmpty();
Append(ns, name);
if (args) {
int lenargs = Len(args);
if (lenargs)
Putc('(', ns);
for (i = 0; i < lenargs; i++) {
Append(ns, Getitem(args, i));
if (i < (lenargs - 1))
Putc(',', ns);
}
if (i)
Putc(')', ns);
}
macro_level--;
return ns;
}
/* Get macro arguments and value */
mvalue = Getattr(macro, kpp_value);
assert(mvalue);
margs = Getattr(macro, kpp_args);
if (args && Getattr(macro, kpp_varargs)) {
isvarargs = 1;
/* Variable length argument macro. We need to collect all of the extra arguments into a single argument */
if (Len(args) >= (Len(margs) - 1)) {
int i;
int vi, na;
String *vararg = NewStringEmpty();
vi = Len(margs) - 1;
na = Len(args);
for (i = vi; i < na; i++) {
Append(vararg, Getitem(args, i));
if ((i + 1) < na) {
Append(vararg, ",");
}
}
/* Remove arguments */
for (i = vi; i < na; i++) {
Delitem(args, vi);
}
Append(args, vararg);
Delete(vararg);
}
}
if (args && margs && Len(margs) == 0 && Len(args) == 1 && Len(Getitem(args, 0)) == 0) {
/* FOO() can invoke a macro defined as FOO(X) as well as one defined FOO().
*
* Handle this by removing the only argument if it's empty and the macro
* expects no arguments.
*
* We don't need to worry about varargs here - a varargs macro will always have
* Len(margs) >= 1, since the varargs are put in the final macro argument.
*/
Delitem(args, 0);
}
/* If there are arguments, see if they match what we were given */
if (args && (!margs || Len(margs) != Len(args))) {
if (margs && Len(margs) > (1 + isvarargs))
Swig_error(macro_start_file, macro_start_line, "Macro '%s' expects %d arguments\n", name, Len(margs) - isvarargs);
else if (margs && Len(margs) == (1 + isvarargs))
Swig_error(macro_start_file, macro_start_line, "Macro '%s' expects 1 argument\n", name);
else
Swig_error(macro_start_file, macro_start_line, "Macro '%s' expects no arguments\n", name);
macro_level--;
return 0;
}
/* If the macro expects arguments, but none were supplied, we leave it in place */
if (!args && margs) {
macro_level--;
return NewString(name);
}
/* Copy the macro value */
ns = Copy(mvalue);
copy_location(mvalue, ns);
/* Tag the macro as being expanded. This is to avoid recursion in
macro expansion */
temp = NewStringEmpty();
tempa = NewStringEmpty();
if (args && margs) {
l = Len(margs);
for (i = 0; i < l; i++) {
DOH *arg, *aname;
String *reparg;
arg = Getitem(args, i); /* Get an argument value */
reparg = Preprocessor_replace(arg, NULL);
aname = Getitem(margs, i); /* Get macro argument name */
if (strchr(Char(ns), '\001')) {
/* Try to replace a quoted version of the argument */
Clear(temp);
Clear(tempa);
Printf(temp, "\001%s", aname);
Printf(tempa, "\"%s\"", arg);
Replace(ns, temp, tempa, DOH_REPLACE_ID_END);
}
if (isvarargs && i == l - 1) {
char *s = Char(ns);
char *a = s;
while ((a = strchr(a, '\006')) != NULL) {
*a = ' ';
while (isspace((unsigned char)*++a)) {
}
if (*a == '(') {
char *e = a;
int depth = 1;
while (*++e) {
if (*e == ')') {
if (--depth == 0)
break;
} else if (*e == '(') {
++depth;
}
}
if (*e) {
if (Len(arg) == 0) {
// Empty varargs so replace ( and ) and everything between with
// spaces.
memset(a, ' ', e - a + 1);
} else {
// Non-empty varargs so replace ( and ) with spaces.
*a = ' ';
*e = ' ';
}
}
a = e + 1;
}
}
}
if (strchr(Char(ns), '\002')) {
/* Look for concatenation tokens */
Clear(temp);
Clear(tempa);
Printf(temp, "\002%s", aname);
Append(tempa, "\002\003");
Replace(ns, temp, tempa, DOH_REPLACE_ID_END);
if (isvarargs && i == l - 1 && Len(arg) == 0) {
// ## followed by a zero length varargs macro argument - if preceded
// by a comma (possibly with whitespace in between) we nuke the
// comma.
char *s = Char(ns);
char *a = s + 1;
while ((a = strstr(a, "\002\003")) != NULL) {
char *t = a;
while (--t >= s) {
if (!isspace((unsigned char)*t)) {
if (*t == ',')
*t = ' ';
break;
}
}
// Advance 3 since we're only interested in \002\003 when it could
// be preceded by a comma.
a += 3;
}
}
Clear(temp);
Clear(tempa);
Printf(temp, "%s\002", aname);
Append(tempa, "\003\002");
Replace(ns, temp, tempa, DOH_REPLACE_ID_BEGIN);
}
/* Non-standard macro expansion. The value `x` is replaced by a quoted
version of the argument except that if the argument is already quoted
nothing happens */
if (strchr(Char(ns), '`')) {
String *rep;
char *c;
Clear(temp);
Printf(temp, "`%s`", aname);
c = Char(arg);
if (*c == '"') {
rep = arg;
} else {
Clear(tempa);
Printf(tempa, "\"%s\"", arg);
rep = tempa;
}
Replace(ns, temp, rep, DOH_REPLACE_ANY);
}
/* Non-standard mangle expansions.
The #@Name is replaced by mangle_arg(Name). */
if (strchr(Char(ns), '\004')) {
String *marg = Swig_name_mangle_string(arg);
Clear(temp);
Printf(temp, "\004%s", aname);
Replace(ns, temp, marg, DOH_REPLACE_ID_END);
Delete(marg);
}
if (strchr(Char(ns), '\005')) {
String *marg = Swig_name_mangle_string(arg);
Clear(temp);
Clear(tempa);
Printf(temp, "\005%s", aname);
Printf(tempa, "\"%s\"", marg);
Replace(ns, temp, tempa, DOH_REPLACE_ID_END);
Delete(marg);
}
/* Replace(ns, aname, arg, DOH_REPLACE_ID); */
Replace(ns, aname, reparg, DOH_REPLACE_ID); /* Replace expanded args */
Replace(ns, "\003", arg, DOH_REPLACE_ANY); /* Replace unexpanded arg */
Delete(reparg);
}
}
Replace(ns, "\002", "", DOH_REPLACE_ANY); /* Get rid of concatenation tokens */
Replace(ns, "\001", "#", DOH_REPLACE_ANY); /* Put # back (non-standard C) */
Replace(ns, "\004", "#@", DOH_REPLACE_ANY); /* Put # back (non-standard C) */
/* Expand this macro even further */
Setattr(macro, kpp_expanded, "1");
e = Preprocessor_replace(ns, line_file);
Delattr(macro, kpp_expanded);
Delete(ns);
if (Getattr(macro, kpp_swigmacro)) {
String *g;
String *f = NewStringEmpty();
Seek(e, 0, SEEK_SET);
copy_location(macro, e);
g = Preprocessor_parse(e);
#if 0
/* Drop the macro in place, but with a marker around it */
Printf(f, "/*@%s,%d,%s@*/%s/*@@*/", Getfile(macro), Getline(macro), name, g);
#else
/* Use simplified around markers to properly count lines in cscanner.c */
if (strchr(Char(g), '\n')) {
Printf(f, "/*@SWIG:%s,%d,%s@*/%s/*@SWIG@*/", Getfile(macro), Getline(macro), name, g);
#if 0
Printf(f, "/*@SWIG:%s@*/%s/*@SWIG@*/", name, g);
#endif
} else {
Append(f, g);
}
#endif
Delete(g);
Delete(e);
e = f;
}
macro_level--;
Delete(temp);
Delete(tempa);
return e;
}
/* -----------------------------------------------------------------------------
* DOH *Preprocessor_replace(DOH *s, DOH *line_file)
*
* Performs a macro substitution on a string s. Returns a new string with
* substitutions applied. This function works by walking down s and looking
* for identifiers. When found, a check is made to see if they are macros
* which are then expanded.
* ----------------------------------------------------------------------------- */
/* #define SWIG_PUT_BUFF */
static DOH *Preprocessor_replace(DOH *s, DOH *line_file) {
DOH *ns, *symbols, *m;
int c, i, state = 0;
String *id = NewStringEmpty();
assert(cpp);
symbols = Getattr(cpp, kpp_symbols);
ns = NewStringEmpty();
copy_location(s, ns);
Seek(s, 0, SEEK_SET);
/* Try to locate identifiers in s and replace them with macro replacements */
while ((c = Getc(s)) != EOF) {
switch (state) {
case 0:
if (isidentifier(c)) {
Clear(id);
Putc(c, id);
state = 4;
} else if (c == '%') {
Clear(id);
Putc(c, id);
state = 2;
} else if (c == '#') {
Clear(id);
Putc(c, id);
state = 4;
} else if (c == '\"') {
Putc(c, ns);
skip_tochar(s, '\"', ns);
} else if (c == '\'') {
Putc(c, ns);
skip_tochar(s, '\'', ns);
} else if (c == '/') {
Putc(c, ns);
state = 10;
} else if (c == '\\') {
Putc(c, ns);
c = Getc(s);
if (c == '\n') {
Putc(c, ns);
} else {
Ungetc(c, s);
}
} else if (c == '\n') {
Putc(c, ns);
expand_defined_operator = 0;
} else {
Putc(c, ns);
}
break;
case 2:
/* Found '%#' */
if (c == '#') {
Putc(c, id);
state = 4;
} else {
Ungetc(c, s);
state = 4;
}
break;
case 4: /* An identifier */
if (isidchar(c)) {
Putc(c, id);
state = 4;
} else {
/* We found the end of a valid identifier */
Ungetc(c, s);
/* See if this is the special "defined" operator */
if (Equal(kpp_defined, id)) {
if (expand_defined_operator) {
int lenargs = 0;
DOH *args = 0;
/* See whether or not a parenthesis has been used */
skip_whitespace(s, 0);
c = Getc(s);
if (c == '(') {
Ungetc(c, s);
args = find_args(s, 0, kpp_defined, 0);
} else if (isidchar(c)) {
DOH *arg = NewStringEmpty();
args = NewList();
Putc(c, arg);
while (((c = Getc(s)) != EOF)) {
if (!isidchar(c)) {
Ungetc(c, s);
break;
}
Putc(c, arg);
}
if (Len(arg))
Append(args, arg);
Delete(arg);
} else {
Seek(s, -1, SEEK_CUR);
}
lenargs = Len(args);
if ((!args) || (!lenargs)) {
/* This is not a defined() operator. */
Append(ns, id);
state = 0;
break;
}
for (i = 0; i < lenargs; i++) {
DOH *o = Getitem(args, i);
if (!Getattr(symbols, o)) {
break;
}
}
if (i < lenargs)
Putc('0', ns);
else
Putc('1', ns);
Delete(args);
} else {
Append(ns, id);
}
state = 0;
break;
} else if (Equal(kpp_LINE, id)) {
Printf(ns, "%d", macro_level > 0 ? macro_start_line : Getline(s));
state = 0;
break;
} else if (Equal(kpp_FILE, id)) {
String *fn = Copy(macro_level > 0 ? macro_start_file : Getfile(s));
Replaceall(fn, "\\", "\\\\");
Printf(ns, "\"%s\"", fn);
Delete(fn);
state = 0;
break;
} else if (Equal(kpp_hash_if, id) || Equal(kpp_hash_elif, id)) {
expand_defined_operator = 1;
Append(ns, id);
} else if (Equal("#ifdef", id) || Equal("#ifndef", id)) {
/* Evaluate the defined-ness check and substitute `#if 0` or `#if 1`. */
int allow = 0;
skip_whitespace(s, 0);
c = Getc(s);
if (isidchar(c)) {
DOH *arg = NewStringEmpty();
Putc(c, arg);
while (((c = Getc(s)) != EOF)) {
if (!isidchar(c)) {
Ungetc(c, s);
break;
}
Putc(c, arg);
}
if (Equal("#ifdef", id)) {
if (Getattr(symbols, arg))
allow = 1;
} else {
if (!Getattr(symbols, arg))
allow = 1;
}
Delete(arg);
} else {
Ungetc(c, s);
Swig_error(Getfile(s), Getline(s), "Missing identifier for %s.\n", id);
}
if (allow) {
Append(ns, "#if 1");
} else {
Append(ns, "#if 0");
}
} else if ((m = Getattr(symbols, id))) {
/* See if the macro is defined in the preprocessor symbol table */
DOH *args = 0;
DOH *e;
int macro_additional_lines = 0;
/* See if the macro expects arguments */
if (Getattr(m, kpp_args)) {
/* Yep. We need to go find the arguments and do a substitution */
args = find_args(s, 1, id, &macro_additional_lines);
} else {
args = 0;
}
e = expand_macro(id, args, s);
if (e) {
Append(ns, e);
}
while (macro_additional_lines--) {
Putc('\n', ns);
}
Delete(e);
Delete(args);
} else {
Append(ns, id);
}
state = 0;
}
break;
case 10:
if (c == '/')
state = 11;
else if (c == '*')
state = 12;
else {
Ungetc(c, s);
state = 0;
break;
}
Putc(c, ns);
break;
case 11:
/* in C++ comment */
Putc(c, ns);
if (c == '\n') {
expand_defined_operator = 0;
state = 0;
}
break;
case 12:
/* in C comment */
Putc(c, ns);
if (c == '*')
state = 13;
break;
case 13:
Putc(c, ns);
if (c == '/')
state = 0;
else if (c != '*')
state = 12;
break;
default:
state = 0;
break;
}
}
/* Identifier at the end */
if (state == 2 || state == 4) {
/* See if this is the special "defined" operator */
if (Equal(kpp_defined, id)) {
Swig_error(Getfile(s), Getline(s), "No arguments given to defined()\n");
} else if (Equal(kpp_LINE, id)) {
Printf(ns, "%d", macro_level > 0 ? macro_start_line : Getline(s));
} else if (Equal(kpp_FILE, id)) {
String *fn = Copy(macro_level > 0 ? macro_start_file : Getfile(s));
Replaceall(fn, "\\", "\\\\");
Printf(ns, "\"%s\"", fn);
Delete(fn);
} else if ((m = Getattr(symbols, id))) {
/* Yes. There is a macro here */
/* If it expects arguments, they must come from `line_file` */
DOH *args = 0;
DOH *e;
int macro_additional_lines = 0;
/* See if the macro expects arguments */
if (Getattr(m, kpp_args) && line_file) {
/* Yep. We need to go find the arguments and do a substitution */
args = find_args(line_file, 1, id, &macro_additional_lines);
} else {
args = 0;
}
e = expand_macro(id, args, s);
if (e) {
Append(ns, e);
}
while (macro_additional_lines--) {
Putc('\n', ns);
}
Delete(e);
Delete(args);
} else {
Append(ns, id);
}
}
Delete(id);
return ns;
}
/* -----------------------------------------------------------------------------
* int checkpp_id(DOH *s)
*
* Checks the string s to see if it contains any unresolved identifiers. This
* function contains the heuristic that determines whether or not a macro
* definition passes through the preprocessor as a constant declaration.
* ----------------------------------------------------------------------------- */
static int checkpp_id(DOH *s) {
int c;
int hastok = 0;
Scanner *scan = id_scan;
Seek(s, 0, SEEK_SET);
Scanner_clear(scan);
s = Copy(s);
Seek(s, SEEK_SET, 0);
Scanner_push(scan, s);
while ((c = Scanner_token(scan))) {
hastok = 1;
if ((c == SWIG_TOKEN_ID) || (c == SWIG_TOKEN_LBRACE) || (c == SWIG_TOKEN_RBRACE))
return 1;
}
if (!hastok)
return 1;
return 0;
}
/* addline(). Utility function for adding lines to a chunk */
static void addline(DOH *s1, DOH *s2, int allow) {
if (allow) {
Append(s1, s2);
} else {
int len = Len(s2);
for (int i = 0; i < len; ++i) {
if (Char(s2)[i] == '\n')
Putc('\n', s1);
}
}
}
static void add_chunk(DOH *ns, DOH *chunk, int allow) {
DOH *echunk;
Seek(chunk, 0, SEEK_SET);
if (allow) {
echunk = Preprocessor_replace(chunk, NULL);
addline(ns, echunk, allow);
Delete(echunk);
} else {
addline(ns, chunk, 0);
}
Clear(chunk);
}
/*
push/pop_imported(): helper functions for defining and undefining
SWIGIMPORTED (when %importing a file).
*/
static void push_imported(void) {
if (imported_depth == 0) {
Preprocessor_define("SWIGIMPORTED 1", 0);
}
++imported_depth;
}
static void pop_imported(void) {
--imported_depth;
if (imported_depth == 0) {
Preprocessor_undef("SWIGIMPORTED");
}
}
/* -----------------------------------------------------------------------------
* Preprocessor_parse()
*
* Parses the string s. Returns a new string containing the preprocessed version.
*
* Parsing rules :
* 1. Lines starting with # are C preprocessor directives
* 2. Macro expansion inside strings is not allowed
* 3. All code inside false conditionals is changed to blank lines
* 4. Code in %{, %} is not parsed because it may need to be
* included inline (with all preprocessor directives included).
* ----------------------------------------------------------------------------- */
String *Preprocessor_parse(String *s) {
String *ns; /* New string containing the preprocessed text */
String *chunk, *decl;
Hash *symbols;
String *id = 0, *value = 0, *comment = 0;
int i, state, e, c;
int start_line = 0;
int allow = 1;
int level = 0;
int dlevel = 0;
int filelevel = 0;
int mask = 0;
int start_level = 0;
int cpp_lines = 0;
int cond_lines[256];
/* Blow away all carriage returns */
Replace(s, "\015", "", DOH_REPLACE_ANY);
ns = NewStringEmpty(); /* Return result */
decl = NewStringEmpty();
id = NewStringEmpty();
value = NewStringEmpty();
comment = NewStringEmpty();
chunk = NewStringEmpty();
copy_location(s, chunk);
copy_location(s, ns);
symbols = Getattr(cpp, kpp_symbols);
state = 0;
while ((c = Getc(s)) != EOF) {
switch (state) {
case 0: /* Initial state - in first column */
/* Look for C preprocessor directives. Otherwise, go directly to state 1 */
if (c == '#') {
copy_location(s, chunk);
add_chunk(ns, chunk, allow);
cpp_lines = 1;
state = 40;
} else if (isspace(c)) {
Putc(c, chunk);
skip_whitespace(s, chunk);
} else {
state = 1;
Ungetc(c, s);
}
break;
case 1:
{ /* Non-preprocessor directive */
/* Look for SWIG directives */
state1:
if (c == '%') {
state = 100;
break;
}
Putc(c, chunk);
if (c == '\n')
state = 0;
else if (c == '\"') {
start_line = Getline(s);
if (skip_tochar(s, '\"', chunk) < 0) {
Swig_error(Getfile(s), start_line, "Unterminated string constant\n");
}
} else if (c == '\'') {
start_line = Getline(s);
if (skip_tochar(s, '\'', chunk) < 0) {
Swig_error(Getfile(s), start_line, "Unterminated character constant\n");
}
} else if (c == '/')
state = 30; /* Comment */
break;
}
case 30: /* Possibly a comment string of some sort */
start_line = Getline(s);
if (c == '/')
state = 31;
else if (c == '*')
state = 32;
else {
state = 1;
goto state1; /* Process this character the same as if it wasn't preceded by a `/`. */
}
Putc(c, chunk);
break;
case 31:
Putc(c, chunk);
if (c == '\n')
state = 0;
break;
case 32:
Putc(c, chunk);
if (c == '*')
state = 33;
break;
case 33:
Putc(c, chunk);
if (c == '/')
state = 1;
else if (c != '*')
state = 32;
break;
case 40: /* Start of a C preprocessor directive */
if (c == '\n') {
Putc('\n', chunk);
state = 0;
} else if (isspace(c)) {
state = 40;
} else {
/* Got the start of a preprocessor directive */
Ungetc(c, s);
Clear(id);
copy_location(s, id);
state = 41;
}
break;
case 41: /* Build up the name of the preprocessor directive */
if ((isspace(c) || (!isidchar(c)))) {
Clear(value);
Clear(comment);
if (c == '\n') {
Ungetc(c, s);
state = 50;
} else {
state = 42;
if (!isspace(c)) {
Ungetc(c, s);
}
}
copy_location(s, value);
break;
}
Putc(c, id);
break;
case 42: /* Strip any leading space after the preprocessor directive (before preprocessor value) */
if (isspace(c)) {
if (c == '\n') {
Ungetc(c, s);
state = 50;
}
break;
}
state = 43;
/* FALL THRU */
case 43:
/* Get preprocessor value */
if (c == '\n') {
Ungetc(c, s);
state = 50;
} else if (c == '/') {
state = 45;
} else if (c == '\"') {
Putc(c, value);
skip_tochar_or_eol(s, '\"', value);
} else if (c == '\'') {
Putc(c, value);
skip_tochar_or_eol(s, '\'', value);
} else {
Putc(c, value);
if (c == '\\')
state = 44;
}
break;
case 44:
if (c == '\n') {
Putc(c, value);
cpp_lines++;
} else {
Ungetc(c, s);
}
state = 43;
break;
/* States 45-48 are used to remove, but retain comments from macro values. The comments
will be placed in the output in an alternative form */
case 45:
if (c == '/')
state = 46;
else if (c == '*')
state = 47;
else if (c == '\n') {
Putc('/', value);
Ungetc(c, s);
state = 50;
} else {
Putc('/', value);
Putc(c, value);
state = 43;
}
break;
case 46: /* in C++ comment */
if (c == '\n') {
Ungetc(c, s);
state = 50;
} else
Putc(c, comment);
break;
case 47: /* in C comment */
if (c == '*')
state = 48;
else
Putc(c, comment);
break;
case 48:
if (c == '/')
state = 43;
else if (c == '*')
Putc(c, comment);
else {
Putc('*', comment);
Putc(c, comment);
state = 47;
}
break;
case 50:
/* Check for various preprocessor directives */
Chop(value);
if (Equal(id, kpp_define)) {
if (allow) {
DOH *m, *v, *v1;
Seek(value, 0, SEEK_SET);
m = Preprocessor_define(value, 0);
if ((m) && !(Getattr(m, kpp_args))) {
v = Copy(Getattr(m, kpp_value));
copy_location(m, v);
if (Len(v)) {
Swig_error_silent(1);
v1 = Preprocessor_replace(v, NULL);
Swig_error_silent(0);
/* Printf(stdout,"checking '%s'\n", v1); */
if (!checkpp_id(v1)) {
if (Len(comment) == 0)
Printf(ns, "%%constant %s = %s;\n", Getattr(m, kpp_name), v1);
else
Printf(ns, "%%constant %s = %s; /*%s*/\n", Getattr(m, kpp_name), v1, comment);
cpp_lines--;
}
Delete(v1);
}
Delete(v);
}
}
} else if (Equal(id, kpp_undef)) {
if (allow)
Preprocessor_undef(value);
} else if (Equal(id, kpp_ifdef)) {
cond_lines[level] = Getline(id);
level++;
if (allow) {
start_level = level;
if (Len(value) > 0) {
/* See if the identifier is in the hash table */
if (!Getattr(symbols, value))
allow = 0;
} else {
Swig_error(Getfile(s), Getline(id), "Missing identifier for #ifdef.\n");
allow = 0;
}
mask = 1;
}
} else if (Equal(id, kpp_ifndef)) {
cond_lines[level] = Getline(id);
level++;
if (allow) {
start_level = level;
if (Len(value) > 0) {
/* See if the identifier is in the hash table */
if (Getattr(symbols, value))
allow = 0;
} else {
Swig_error(Getfile(s), Getline(id), "Missing identifier for #ifndef.\n");
allow = 0;
}
mask = 1;
}
} else if (Equal(id, kpp_else)) {
if (level <= 0) {
Swig_error(Getfile(s), Getline(id), "Misplaced #else.\n");
} else {
cond_lines[level - 1] = Getline(id);
if (Len(value) != 0)
Swig_warning(WARN_PP_UNEXPECTED_TOKENS, Getfile(s), Getline(id), "Unexpected tokens after #else directive.\n");
if (allow) {
allow = 0;
mask = 0;
} else if (level == start_level) {
allow = 1 * mask;
}
}
} else if (Equal(id, kpp_endif)) {
level--;
if (level < 0) {
Swig_error(Getfile(id), Getline(id), "Extraneous #endif.\n");
level = 0;
} else {
if (level < start_level) {
if (Len(value) != 0)
Swig_warning(WARN_PP_UNEXPECTED_TOKENS, Getfile(s), Getline(id), "Unexpected tokens after #endif directive.\n");
allow = 1;
start_level--;
}
}
} else if (Equal(id, kpp_if)) {
cond_lines[level] = Getline(id);
level++;
if (allow) {
int val;
String *sval;
expand_defined_operator = 1;
sval = Preprocessor_replace(value, NULL);
start_level = level;
Seek(sval, 0, SEEK_SET);
/* Printf(stdout,"Evaluating '%s'\n", sval); */
if (Len(sval) > 0) {
val = Preprocessor_expr(sval, &e);
if (e) {
const char *msg = Preprocessor_expr_error();
Seek(value, 0, SEEK_SET);
Swig_warning(WARN_PP_EVALUATION, Getfile(value), Getline(value), "Could not evaluate expression '%s'\n", value);
if (msg)
Swig_warning(WARN_PP_EVALUATION, Getfile(value), Getline(value), "%s\n", msg);
allow = 0;
} else {
if (val == 0)
allow = 0;
}
} else {
Swig_error(Getfile(s), Getline(id), "Missing expression for #if.\n");
allow = 0;
}
expand_defined_operator = 0;
mask = 1;
}
} else if (Equal(id, kpp_elif)) {
if (level == 0) {
Swig_error(Getfile(s), Getline(id), "Misplaced #elif.\n");
} else {
cond_lines[level - 1] = Getline(id);
if (allow) {
allow = 0;
mask = 0;
} else if (level == start_level) {
int val;
String *sval;
expand_defined_operator = 1;
sval = Preprocessor_replace(value, NULL);
Seek(sval, 0, SEEK_SET);
if (Len(sval) > 0) {
val = Preprocessor_expr(sval, &e);
if (e) {
const char *msg = Preprocessor_expr_error();
Seek(value, 0, SEEK_SET);
Swig_warning(WARN_PP_EVALUATION, Getfile(value), Getline(value), "Could not evaluate expression '%s'\n", value);
if (msg)
Swig_warning(WARN_PP_EVALUATION, Getfile(value), Getline(value), "%s\n", msg);
allow = 0;
} else {
if (val)
allow = 1 * mask;
else
allow = 0;
}
} else {
Swig_error(Getfile(s), Getline(id), "Missing expression for #elif.\n");
allow = 0;
}
expand_defined_operator = 0;
}
}
} else if (Equal(id, kpp_warning)) {
if (allow) {
Swig_warning(WARN_PP_CPP_WARNING, Getfile(s), Getline(id), "CPP #warning, \"%s\".\n", value);
}
} else if (Equal(id, kpp_error)) {
if (allow) {
if (error_as_warning) {
Swig_warning(WARN_PP_CPP_ERROR, Getfile(s), Getline(id), "CPP #error \"%s\".\n", value);
} else {
Swig_error(Getfile(s), Getline(id), "CPP #error \"%s\". Use the -cpperraswarn option to continue swig processing.\n", value);
}
}
} else if (Equal(id, kpp_line)) {
} else if (Equal(id, kpp_include)) {
if (((include_all) || (import_all)) && (allow)) {
String *s1, *s2, *fn;
String *dirname;
int sysfile = 0;
if (include_all && import_all) {
Swig_warning(WARN_PP_INCLUDEALL_IMPORTALL, Getfile(s), Getline(id), "Both includeall and importall are defined: using includeall.\n");
import_all = 0;
}
Seek(value, 0, SEEK_SET);
fn = get_filename(value, &sysfile);
s1 = cpp_include(fn, sysfile);
if (s1) {
if (include_all)
Printf(ns, "%%includefile \"%s\" %%beginfile\n", Swig_filename_escape(Swig_last_file()));
else if (import_all) {
Printf(ns, "%%importfile \"%s\" %%beginfile\n", Swig_filename_escape(Swig_last_file()));
push_imported();
}
/* See if the filename has a directory component */
dirname = Swig_file_dirname(Swig_last_file());
if (sysfile || !Len(dirname)) {
Delete(dirname);
dirname = 0;
}
if (dirname) {
int len = Len(dirname);
Delslice(dirname, len - 1, len); /* Kill trailing directory delimiter */
Swig_push_directory(dirname);
}
s2 = Preprocessor_parse(s1);
addline(ns, s2, allow);
Append(ns, "%endoffile");
if (dirname) {
Swig_pop_directory();
}
if (import_all) {
pop_imported();
}
Delete(s2);
Delete(dirname);
Delete(s1);
}
Delete(fn);
}
} else if (Equal(id, kpp_pragma)) {
if (Strncmp(value, "SWIG ", 5) == 0) {
char *c = Char(value) + 5;
while (*c && (isspace((int)*c)))
c++;
if (*c) {
if (strncmp(c, "nowarn=", 7) == 0) {
String *val = NewString(c + 7);
String *nowarn = Preprocessor_replace(val, NULL);
Swig_warnfilter(nowarn, 1);
Delete(nowarn);
Delete(val);
} else if (strncmp(c, "cpperraswarn=", 13) == 0) {
error_as_warning = atoi(c + 13);
} else {
Swig_error(Getfile(s), Getline(id), "Unknown SWIG pragma: %s\n", c);
}
}
}
} else if (Equal(id, kpp_level)) {
Swig_error(Getfile(s), Getline(id), "cpp debug: level = %d, startlevel = %d\n", level, start_level);
} else if (Equal(id, "")) {
/* Null directive */
} else if (is_digits(id)) {
/* A gcc linemarker of the form '# linenum filename flags' (resulting from running gcc -E) */
} else {
/* Ignore unknown preprocessor directives which are inside an inactive
* conditional (github issue #394). */
if (allow)
Swig_error(
Getfile(s), Getline(id), "Unknown SWIG preprocessor directive: %s (if this is a block of target language code, delimit it with %%{ and %%})\n", id);
}
for (i = 0; i < cpp_lines; i++)
Putc('\n', ns);
state = 0;
break;
/* SWIG directives */
case 100:
/* %{,%} block */
if (c == '{') {
start_line = Getline(s);
copy_location(s, chunk);
add_chunk(ns, chunk, allow);
Putc('%', chunk);
Putc(c, chunk);
state = 105;
}
/* %#cpp - an embedded C preprocessor directive (we strip off the %) */
else if (c == '#') {
add_chunk(ns, chunk, allow);
Putc(c, chunk);
state = 107;
} else if (isidentifier(c)) {
Clear(decl);
Putc('%', decl);
Putc(c, decl);
state = 110;
} else {
Putc('%', chunk);
Putc(c, chunk);
state = 1;
}
break;
case 105:
Putc(c, chunk);
if (c == '%')
state = 106;
break;
case 106:
Putc(c, chunk);
if (c == '}') {
state = 1;
addline(ns, chunk, allow);
Clear(chunk);
copy_location(s, chunk);
} else {
state = 105;
}
break;
case 107:
Putc(c, chunk);
if (c == '\n') {
addline(ns, chunk, allow);
Clear(chunk);
state = 0;
} else if (c == '\\') {
state = 108;
}
break;
case 108:
Putc(c, chunk);
state = 107;
break;
case 110:
if (!isidchar(c)) {
Ungetc(c, s);
/* Look for common SWIG directives */
if (Equal(decl, kpp_dinclude) || Equal(decl, kpp_dimport)) {
/* Got some kind of file inclusion directive, eg: %import(option1="value1") "filename" */
if (allow) {
DOH *s1, *s2, *fn, *opt;
String *options_whitespace = NewStringEmpty();
String *filename_whitespace = NewStringEmpty();
int sysfile = 0;
skip_whitespace(s, options_whitespace);
opt = get_options(s);
skip_whitespace(s, filename_whitespace);
fn = get_filename(s, &sysfile);
s1 = cpp_include(fn, sysfile);
if (s1) {
String *dirname;
copy_location(s, chunk);
add_chunk(ns, chunk, allow);
Printf(ns, "%sfile%s%s%s\"%s\" %%beginfile\n", decl, options_whitespace, opt, filename_whitespace, Swig_filename_escape(Swig_last_file()));
if (Equal(decl, kpp_dimport)) {
push_imported();
}
dirname = Swig_file_dirname(Swig_last_file());
if (sysfile || !Len(dirname)) {
Delete(dirname);
dirname = 0;
}
if (dirname) {
int len = Len(dirname);
Delslice(dirname, len - 1, len); /* Kill trailing directory delimiter */
Swig_push_directory(dirname);
}
s2 = Preprocessor_parse(s1);
if (dirname) {
Swig_pop_directory();
}
if (Equal(decl, kpp_dimport)) {
pop_imported();
}
addline(ns, s2, allow);
Append(ns, "%endoffile");
Delete(s2);
Delete(dirname);
Delete(s1);
}
Delete(fn);
Delete(filename_whitespace);
Delete(options_whitespace);
}
state = 1;
} else if (Equal(decl, kpp_dbeginfile)) {
/* Got an internal directive marking the beginning of an included file: %beginfile ... %endoffile */
filelevel++;
start_line = Getline(s);
copy_location(s, chunk);
add_chunk(ns, chunk, allow);
Append(chunk, decl);
state = 120;
} else if (Equal(decl, kpp_dline)) {
/* Got a line directive */
state = 1;
} else if (Equal(decl, kpp_ddefine)) {
/* Got a define directive */
dlevel++;
copy_location(s, chunk);
add_chunk(ns, chunk, allow);
Clear(value);
copy_location(s, value);
state = 150;
} else {
Append(chunk, decl);
state = 1;
}
} else {
Putc(c, decl);
}
break;
/* Searching for the end of a %beginfile block */
case 120:
Putc(c, chunk);
if (c == '%') {
const char *bf = "beginfile";
const char *ef = "endoffile";
char statement[10];
int i = 0;
for (i = 0; i < 9;) {
c = Getc(s);
Putc(c, chunk);
statement[i++] = (char)c;
if (strncmp(statement, bf, i) && strncmp(statement, ef, i))
break;
}
c = Getc(s);
Ungetc(c, s);
if ((i == 9) && (isspace(c))) {
if (strncmp(statement, bf, i) == 0) {
++filelevel;
} else if (strncmp(statement, ef, i) == 0) {
--filelevel;
if (!filelevel) {
/* Reached end of included file */
addline(ns, chunk, allow);
Clear(chunk);
copy_location(s, chunk);
state = 1;
}
}
}
}
break;
/* Searching for the end of a %define statement */
case 150:
Putc(c, value);
if (c == '%') {
const char *ed = "enddef";
const char *df = "define";
char statement[7];
int i = 0;
for (i = 0; i < 6;) {
c = Getc(s);
Putc(c, value);
statement[i++] = (char)c;
if (strncmp(statement, ed, i) && strncmp(statement, df, i))
break;
}
c = Getc(s);
Ungetc(c, s);
if ((i == 6) && (isspace(c))) {
if (strncmp(statement, df, i) == 0) {
++dlevel;
} else {
if (strncmp(statement, ed, i) == 0) {
--dlevel;
if (!dlevel) {
/* Got the macro */
for (i = 0; i < 7; i++) {
Delitem(value, DOH_END);
}
if (allow) {
Seek(value, 0, SEEK_SET);
Preprocessor_define(value, 1);
}
addline(ns, value, 0);
state = 0;
}
}
}
}
}
break;
default:
Printf(stderr, "cpp: Invalid parser state %d\n", state);
Exit(EXIT_FAILURE);
}
}
while (level > 0) {
Swig_error(Getfile(s), cond_lines[level - 1], "Missing #endif for conditional starting here\n");
level--;
}
if (state == 120) {
Swig_error(Getfile(s), start_line, "Missing %%endoffile for file inclusion block starting here\n");
}
if (state == 150) {
Seek(value, 0, SEEK_SET);
Swig_error(Getfile(s), Getline(value), "Missing %%enddef for macro starting here\n", Getline(value));
}
if ((state >= 105) && (state < 107)) {
Swig_error(Getfile(s), start_line, "Unterminated %%{ ... %%} block\n");
}
if ((state >= 30) && (state < 40)) {
Swig_error(Getfile(s), start_line, "Unterminated comment\n");
}
copy_location(s, chunk);
add_chunk(ns, chunk, allow);
/* DelScope(scp); */
Delete(decl);
Delete(id);
Delete(value);
Delete(comment);
Delete(chunk);
return ns;
}