| /* Multiple source language support for GDB. |
| Copyright 1991, 1992 Free Software Foundation, Inc. |
| Contributed by the Department of Computer Science at the State University |
| of New York at Buffalo. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* This file contains functions that return things that are specific |
| to languages. Each function should examine current_language if necessary, |
| and return the appropriate result. */ |
| |
| /* FIXME: Most of these would be better organized as macros which |
| return data out of a "language-specific" struct pointer that is set |
| whenever the working language changes. That would be a lot faster. */ |
| |
| #include "defs.h" |
| #include <ctype.h> |
| #include "gdb_string.h" |
| |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "value.h" |
| #include "gdbcmd.h" |
| #include "frame.h" |
| #include "expression.h" |
| #include "language.h" |
| #include "target.h" |
| #include "parser-defs.h" |
| |
| extern void _initialize_language PARAMS ((void)); |
| |
| static void |
| show_language_command PARAMS ((char *, int)); |
| |
| static void |
| set_language_command PARAMS ((char *, int)); |
| |
| static void |
| show_type_command PARAMS ((char *, int)); |
| |
| static void |
| set_type_command PARAMS ((char *, int)); |
| |
| static void |
| show_range_command PARAMS ((char *, int)); |
| |
| static void |
| set_range_command PARAMS ((char *, int)); |
| |
| static void |
| set_range_str PARAMS ((void)); |
| |
| static void |
| set_type_str PARAMS ((void)); |
| |
| static void |
| set_lang_str PARAMS ((void)); |
| |
| static void |
| unk_lang_error PARAMS ((char *)); |
| |
| static int |
| unk_lang_parser PARAMS ((void)); |
| |
| static void |
| show_check PARAMS ((char *, int)); |
| |
| static void |
| set_check PARAMS ((char *, int)); |
| |
| static void |
| set_type_range PARAMS ((void)); |
| |
| static void |
| unk_lang_emit_char PARAMS ((int c, GDB_FILE * stream, int quoter)); |
| |
| static void |
| unk_lang_printchar PARAMS ((int c, GDB_FILE * stream)); |
| |
| static void |
| unk_lang_printstr PARAMS ((GDB_FILE * stream, char *string, unsigned int length, int width, int force_ellipses)); |
| |
| static struct type * |
| unk_lang_create_fundamental_type PARAMS ((struct objfile *, int)); |
| |
| static void |
| unk_lang_print_type PARAMS ((struct type *, char *, GDB_FILE *, int, int)); |
| |
| static int |
| unk_lang_val_print PARAMS ((struct type *, char *, int, CORE_ADDR, GDB_FILE *, |
| int, int, int, enum val_prettyprint)); |
| |
| static int |
| unk_lang_value_print PARAMS ((value_ptr, GDB_FILE *, int, enum val_prettyprint)); |
| |
| /* Forward declaration */ |
| extern const struct language_defn unknown_language_defn; |
| extern char *warning_pre_print; |
| |
| /* The current (default at startup) state of type and range checking. |
| (If the modes are set to "auto", though, these are changed based |
| on the default language at startup, and then again based on the |
| language of the first source file. */ |
| |
| enum range_mode range_mode = range_mode_auto; |
| enum range_check range_check = range_check_off; |
| enum type_mode type_mode = type_mode_auto; |
| enum type_check type_check = type_check_off; |
| |
| /* The current language and language_mode (see language.h) */ |
| |
| const struct language_defn *current_language = &unknown_language_defn; |
| enum language_mode language_mode = language_mode_auto; |
| |
| /* The language that the user expects to be typing in (the language |
| of main(), or the last language we notified them about, or C). */ |
| |
| const struct language_defn *expected_language; |
| |
| /* The list of supported languages. The list itself is malloc'd. */ |
| |
| static const struct language_defn **languages; |
| static unsigned languages_size; |
| static unsigned languages_allocsize; |
| #define DEFAULT_ALLOCSIZE 4 |
| |
| /* The "set language/type/range" commands all put stuff in these |
| buffers. This is to make them work as set/show commands. The |
| user's string is copied here, then the set_* commands look at |
| them and update them to something that looks nice when it is |
| printed out. */ |
| |
| static char *language; |
| static char *type; |
| static char *range; |
| |
| /* Warning issued when current_language and the language of the current |
| frame do not match. */ |
| char lang_frame_mismatch_warn[] = |
| "Warning: the current language does not match this frame."; |
| |
| |
| /* This page contains the functions corresponding to GDB commands |
| and their helpers. */ |
| |
| /* Show command. Display a warning if the language set |
| does not match the frame. */ |
| static void |
| show_language_command (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| enum language flang; /* The language of the current frame */ |
| |
| flang = get_frame_language (); |
| if (flang != language_unknown && |
| language_mode == language_mode_manual && |
| current_language->la_language != flang) |
| printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| } |
| |
| /* Set command. Change the current working language. */ |
| static void |
| set_language_command (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| int i; |
| enum language flang; |
| char *err_lang; |
| |
| if (!language || !language[0]) |
| { |
| printf_unfiltered ("The currently understood settings are:\n\n"); |
| printf_unfiltered ("local or auto Automatic setting based on source file\n"); |
| |
| for (i = 0; i < languages_size; ++i) |
| { |
| /* Already dealt with these above. */ |
| if (languages[i]->la_language == language_unknown |
| || languages[i]->la_language == language_auto) |
| continue; |
| |
| /* FIXME for now assume that the human-readable name is just |
| a capitalization of the internal name. */ |
| printf_unfiltered ("%-16s Use the %c%s language\n", |
| languages[i]->la_name, |
| /* Capitalize first letter of language |
| name. */ |
| toupper (languages[i]->la_name[0]), |
| languages[i]->la_name + 1); |
| } |
| /* Restore the silly string. */ |
| set_language (current_language->la_language); |
| return; |
| } |
| |
| /* Search the list of languages for a match. */ |
| for (i = 0; i < languages_size; i++) |
| { |
| if (STREQ (languages[i]->la_name, language)) |
| { |
| /* Found it! Go into manual mode, and use this language. */ |
| if (languages[i]->la_language == language_auto) |
| { |
| /* Enter auto mode. Set to the current frame's language, if known. */ |
| language_mode = language_mode_auto; |
| flang = get_frame_language (); |
| if (flang != language_unknown) |
| set_language (flang); |
| expected_language = current_language; |
| return; |
| } |
| else |
| { |
| /* Enter manual mode. Set the specified language. */ |
| language_mode = language_mode_manual; |
| current_language = languages[i]; |
| set_type_range (); |
| set_lang_str (); |
| expected_language = current_language; |
| return; |
| } |
| } |
| } |
| |
| /* Reset the language (esp. the global string "language") to the |
| correct values. */ |
| err_lang = savestring (language, strlen (language)); |
| make_cleanup (free, err_lang); /* Free it after error */ |
| set_language (current_language->la_language); |
| error ("Unknown language `%s'.", err_lang); |
| } |
| |
| /* Show command. Display a warning if the type setting does |
| not match the current language. */ |
| static void |
| show_type_command (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| if (type_check != current_language->la_type_check) |
| printf_unfiltered ( |
| "Warning: the current type check setting does not match the language.\n"); |
| } |
| |
| /* Set command. Change the setting for type checking. */ |
| static void |
| set_type_command (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| if (STREQ (type, "on")) |
| { |
| type_check = type_check_on; |
| type_mode = type_mode_manual; |
| } |
| else if (STREQ (type, "warn")) |
| { |
| type_check = type_check_warn; |
| type_mode = type_mode_manual; |
| } |
| else if (STREQ (type, "off")) |
| { |
| type_check = type_check_off; |
| type_mode = type_mode_manual; |
| } |
| else if (STREQ (type, "auto")) |
| { |
| type_mode = type_mode_auto; |
| set_type_range (); |
| /* Avoid hitting the set_type_str call below. We |
| did it in set_type_range. */ |
| return; |
| } |
| set_type_str (); |
| show_type_command ((char *) NULL, from_tty); |
| } |
| |
| /* Show command. Display a warning if the range setting does |
| not match the current language. */ |
| static void |
| show_range_command (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| |
| if (range_check != current_language->la_range_check) |
| printf_unfiltered ( |
| "Warning: the current range check setting does not match the language.\n"); |
| } |
| |
| /* Set command. Change the setting for range checking. */ |
| static void |
| set_range_command (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| if (STREQ (range, "on")) |
| { |
| range_check = range_check_on; |
| range_mode = range_mode_manual; |
| } |
| else if (STREQ (range, "warn")) |
| { |
| range_check = range_check_warn; |
| range_mode = range_mode_manual; |
| } |
| else if (STREQ (range, "off")) |
| { |
| range_check = range_check_off; |
| range_mode = range_mode_manual; |
| } |
| else if (STREQ (range, "auto")) |
| { |
| range_mode = range_mode_auto; |
| set_type_range (); |
| /* Avoid hitting the set_range_str call below. We |
| did it in set_type_range. */ |
| return; |
| } |
| set_range_str (); |
| show_range_command ((char *) 0, from_tty); |
| } |
| |
| /* Set the status of range and type checking based on |
| the current modes and the current language. |
| If SHOW is non-zero, then print out the current language, |
| type and range checking status. */ |
| static void |
| set_type_range () |
| { |
| |
| if (range_mode == range_mode_auto) |
| range_check = current_language->la_range_check; |
| |
| if (type_mode == type_mode_auto) |
| type_check = current_language->la_type_check; |
| |
| set_type_str (); |
| set_range_str (); |
| } |
| |
| /* Set current language to (enum language) LANG. Returns previous language. */ |
| |
| enum language |
| set_language (lang) |
| enum language lang; |
| { |
| int i; |
| enum language prev_language; |
| |
| prev_language = current_language->la_language; |
| |
| for (i = 0; i < languages_size; i++) |
| { |
| if (languages[i]->la_language == lang) |
| { |
| current_language = languages[i]; |
| set_type_range (); |
| set_lang_str (); |
| break; |
| } |
| } |
| |
| return prev_language; |
| } |
| |
| /* This page contains functions that update the global vars |
| language, type and range. */ |
| static void |
| set_lang_str () |
| { |
| char *prefix = ""; |
| |
| free (language); |
| if (language_mode == language_mode_auto) |
| prefix = "auto; currently "; |
| |
| language = concat (prefix, current_language->la_name, NULL); |
| } |
| |
| static void |
| set_type_str () |
| { |
| char *tmp, *prefix = ""; |
| |
| free (type); |
| if (type_mode == type_mode_auto) |
| prefix = "auto; currently "; |
| |
| switch (type_check) |
| { |
| case type_check_on: |
| tmp = "on"; |
| break; |
| case type_check_off: |
| tmp = "off"; |
| break; |
| case type_check_warn: |
| tmp = "warn"; |
| break; |
| default: |
| error ("Unrecognized type check setting."); |
| } |
| |
| type = concat (prefix, tmp, NULL); |
| } |
| |
| static void |
| set_range_str () |
| { |
| char *tmp, *pref = ""; |
| |
| free (range); |
| if (range_mode == range_mode_auto) |
| pref = "auto; currently "; |
| |
| switch (range_check) |
| { |
| case range_check_on: |
| tmp = "on"; |
| break; |
| case range_check_off: |
| tmp = "off"; |
| break; |
| case range_check_warn: |
| tmp = "warn"; |
| break; |
| default: |
| error ("Unrecognized range check setting."); |
| } |
| |
| range = concat (pref, tmp, NULL); |
| } |
| |
| |
| /* Print out the current language settings: language, range and |
| type checking. If QUIETLY, print only what has changed. */ |
| |
| void |
| language_info (quietly) |
| int quietly; |
| { |
| if (quietly && expected_language == current_language) |
| return; |
| |
| expected_language = current_language; |
| printf_unfiltered ("Current language: %s\n", language); |
| show_language_command ((char *) 0, 1); |
| |
| if (!quietly) |
| { |
| printf_unfiltered ("Type checking: %s\n", type); |
| show_type_command ((char *) 0, 1); |
| printf_unfiltered ("Range checking: %s\n", range); |
| show_range_command ((char *) 0, 1); |
| } |
| } |
| |
| /* Return the result of a binary operation. */ |
| |
| #if 0 /* Currently unused */ |
| |
| struct type * |
| binop_result_type (v1, v2) |
| value_ptr v1, v2; |
| { |
| int size, uns; |
| struct type *t1 = check_typedef (VALUE_TYPE (v1)); |
| struct type *t2 = check_typedef (VALUE_TYPE (v2)); |
| |
| int l1 = TYPE_LENGTH (t1); |
| int l2 = TYPE_LENGTH (t2); |
| |
| switch (current_language->la_language) |
| { |
| case language_c: |
| case language_cplus: |
| if (TYPE_CODE (t1) == TYPE_CODE_FLT) |
| return TYPE_CODE (t2) == TYPE_CODE_FLT && l2 > l1 ? |
| VALUE_TYPE (v2) : VALUE_TYPE (v1); |
| else if (TYPE_CODE (t2) == TYPE_CODE_FLT) |
| return TYPE_CODE (t1) == TYPE_CODE_FLT && l1 > l2 ? |
| VALUE_TYPE (v1) : VALUE_TYPE (v2); |
| else if (TYPE_UNSIGNED (t1) && l1 > l2) |
| return VALUE_TYPE (v1); |
| else if (TYPE_UNSIGNED (t2) && l2 > l1) |
| return VALUE_TYPE (v2); |
| else /* Both are signed. Result is the longer type */ |
| return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2); |
| break; |
| case language_m2: |
| /* If we are doing type-checking, l1 should equal l2, so this is |
| not needed. */ |
| return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2); |
| break; |
| case language_chill: |
| error ("Missing Chill support in function binop_result_check."); /*FIXME */ |
| } |
| abort (); |
| return (struct type *) 0; /* For lint */ |
| } |
| |
| #endif /* 0 */ |
| |
| |
| /* This page contains functions that return format strings for |
| printf for printing out numbers in different formats */ |
| |
| /* Returns the appropriate printf format for hexadecimal |
| numbers. */ |
| char * |
| local_hex_format_custom (pre) |
| char *pre; |
| { |
| static char form[50]; |
| |
| strcpy (form, local_hex_format_prefix ()); |
| strcat (form, "%"); |
| strcat (form, pre); |
| strcat (form, local_hex_format_specifier ()); |
| strcat (form, local_hex_format_suffix ()); |
| return form; |
| } |
| |
| /* Converts a number to hexadecimal and stores it in a static |
| string. Returns a pointer to this string. */ |
| char * |
| local_hex_string (num) |
| unsigned long num; |
| { |
| static char res[50]; |
| |
| sprintf (res, local_hex_format (), num); |
| return res; |
| } |
| |
| /* Converts a number to custom hexadecimal and stores it in a static |
| string. Returns a pointer to this string. */ |
| char * |
| local_hex_string_custom (num, pre) |
| unsigned long num; |
| char *pre; |
| { |
| static char res[50]; |
| |
| sprintf (res, local_hex_format_custom (pre), num); |
| return res; |
| } |
| |
| /* Returns the appropriate printf format for octal |
| numbers. */ |
| char * |
| local_octal_format_custom (pre) |
| char *pre; |
| { |
| static char form[50]; |
| |
| strcpy (form, local_octal_format_prefix ()); |
| strcat (form, "%"); |
| strcat (form, pre); |
| strcat (form, local_octal_format_specifier ()); |
| strcat (form, local_octal_format_suffix ()); |
| return form; |
| } |
| |
| /* Returns the appropriate printf format for decimal numbers. */ |
| char * |
| local_decimal_format_custom (pre) |
| char *pre; |
| { |
| static char form[50]; |
| |
| strcpy (form, local_decimal_format_prefix ()); |
| strcat (form, "%"); |
| strcat (form, pre); |
| strcat (form, local_decimal_format_specifier ()); |
| strcat (form, local_decimal_format_suffix ()); |
| return form; |
| } |
| |
| #if 0 |
| /* This page contains functions that are used in type/range checking. |
| They all return zero if the type/range check fails. |
| |
| It is hoped that these will make extending GDB to parse different |
| languages a little easier. These are primarily used in eval.c when |
| evaluating expressions and making sure that their types are correct. |
| Instead of having a mess of conjucted/disjuncted expressions in an "if", |
| the ideas of type can be wrapped up in the following functions. |
| |
| Note that some of them are not currently dependent upon which language |
| is currently being parsed. For example, floats are the same in |
| C and Modula-2 (ie. the only floating point type has TYPE_CODE of |
| TYPE_CODE_FLT), while booleans are different. */ |
| |
| /* Returns non-zero if its argument is a simple type. This is the same for |
| both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur, |
| and thus will never cause the failure of the test. */ |
| int |
| simple_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| switch (TYPE_CODE (type)) |
| { |
| case TYPE_CODE_INT: |
| case TYPE_CODE_CHAR: |
| case TYPE_CODE_ENUM: |
| case TYPE_CODE_FLT: |
| case TYPE_CODE_RANGE: |
| case TYPE_CODE_BOOL: |
| return 1; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| /* Returns non-zero if its argument is of an ordered type. |
| An ordered type is one in which the elements can be tested for the |
| properties of "greater than", "less than", etc, or for which the |
| operations "increment" or "decrement" make sense. */ |
| int |
| ordered_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| switch (TYPE_CODE (type)) |
| { |
| case TYPE_CODE_INT: |
| case TYPE_CODE_CHAR: |
| case TYPE_CODE_ENUM: |
| case TYPE_CODE_FLT: |
| case TYPE_CODE_RANGE: |
| return 1; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| /* Returns non-zero if the two types are the same */ |
| int |
| same_type (arg1, arg2) |
| struct type *arg1, *arg2; |
| { |
| CHECK_TYPEDEF (type); |
| if (structured_type (arg1) ? !structured_type (arg2) : structured_type (arg2)) |
| /* One is structured and one isn't */ |
| return 0; |
| else if (structured_type (arg1) && structured_type (arg2)) |
| return arg1 == arg2; |
| else if (numeric_type (arg1) && numeric_type (arg2)) |
| return (TYPE_CODE (arg2) == TYPE_CODE (arg1)) && |
| (TYPE_UNSIGNED (arg1) == TYPE_UNSIGNED (arg2)) |
| ? 1 : 0; |
| else |
| return arg1 == arg2; |
| } |
| |
| /* Returns non-zero if the type is integral */ |
| int |
| integral_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| switch (current_language->la_language) |
| { |
| case language_c: |
| case language_cplus: |
| return (TYPE_CODE (type) != TYPE_CODE_INT) && |
| (TYPE_CODE (type) != TYPE_CODE_ENUM) ? 0 : 1; |
| case language_m2: |
| return TYPE_CODE (type) != TYPE_CODE_INT ? 0 : 1; |
| case language_chill: |
| error ("Missing Chill support in function integral_type."); /*FIXME */ |
| default: |
| error ("Language not supported."); |
| } |
| } |
| |
| /* Returns non-zero if the value is numeric */ |
| int |
| numeric_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| switch (TYPE_CODE (type)) |
| { |
| case TYPE_CODE_INT: |
| case TYPE_CODE_FLT: |
| return 1; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| /* Returns non-zero if the value is a character type */ |
| int |
| character_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| switch (current_language->la_language) |
| { |
| case language_chill: |
| case language_m2: |
| return TYPE_CODE (type) != TYPE_CODE_CHAR ? 0 : 1; |
| |
| case language_c: |
| case language_cplus: |
| return (TYPE_CODE (type) == TYPE_CODE_INT) && |
| TYPE_LENGTH (type) == sizeof (char) |
| ? 1 : 0; |
| default: |
| return (0); |
| } |
| } |
| |
| /* Returns non-zero if the value is a string type */ |
| int |
| string_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| switch (current_language->la_language) |
| { |
| case language_chill: |
| case language_m2: |
| return TYPE_CODE (type) != TYPE_CODE_STRING ? 0 : 1; |
| |
| case language_c: |
| case language_cplus: |
| /* C does not have distinct string type. */ |
| return (0); |
| default: |
| return (0); |
| } |
| } |
| |
| /* Returns non-zero if the value is a boolean type */ |
| int |
| boolean_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| if (TYPE_CODE (type) == TYPE_CODE_BOOL) |
| return 1; |
| switch (current_language->la_language) |
| { |
| case language_c: |
| case language_cplus: |
| /* Might be more cleanly handled by having a TYPE_CODE_INT_NOT_BOOL |
| for CHILL and such languages, or a TYPE_CODE_INT_OR_BOOL for C. */ |
| if (TYPE_CODE (type) == TYPE_CODE_INT) |
| return 1; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| /* Returns non-zero if the value is a floating-point type */ |
| int |
| float_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| return TYPE_CODE (type) == TYPE_CODE_FLT; |
| } |
| |
| /* Returns non-zero if the value is a pointer type */ |
| int |
| pointer_type (type) |
| struct type *type; |
| { |
| return TYPE_CODE (type) == TYPE_CODE_PTR || |
| TYPE_CODE (type) == TYPE_CODE_REF; |
| } |
| |
| /* Returns non-zero if the value is a structured type */ |
| int |
| structured_type (type) |
| struct type *type; |
| { |
| CHECK_TYPEDEF (type); |
| switch (current_language->la_language) |
| { |
| case language_c: |
| case language_cplus: |
| return (TYPE_CODE (type) == TYPE_CODE_STRUCT) || |
| (TYPE_CODE (type) == TYPE_CODE_UNION) || |
| (TYPE_CODE (type) == TYPE_CODE_ARRAY); |
| case language_m2: |
| return (TYPE_CODE (type) == TYPE_CODE_STRUCT) || |
| (TYPE_CODE (type) == TYPE_CODE_SET) || |
| (TYPE_CODE (type) == TYPE_CODE_ARRAY); |
| case language_chill: |
| error ("Missing Chill support in function structured_type."); /*FIXME */ |
| default: |
| return (0); |
| } |
| } |
| #endif |
| |
| struct type * |
| lang_bool_type () |
| { |
| struct symbol *sym; |
| struct type *type; |
| switch (current_language->la_language) |
| { |
| case language_chill: |
| return builtin_type_chill_bool; |
| case language_fortran: |
| sym = lookup_symbol ("logical", NULL, VAR_NAMESPACE, NULL, NULL); |
| if (sym) |
| { |
| type = SYMBOL_TYPE (sym); |
| if (type && TYPE_CODE (type) == TYPE_CODE_BOOL) |
| return type; |
| } |
| return builtin_type_f_logical_s2; |
| case language_cplus: |
| sym = lookup_symbol ("bool", NULL, VAR_NAMESPACE, NULL, NULL); |
| if (sym) |
| { |
| type = SYMBOL_TYPE (sym); |
| if (type && TYPE_CODE (type) == TYPE_CODE_BOOL) |
| return type; |
| } |
| return builtin_type_bool; |
| default: |
| return builtin_type_int; |
| } |
| } |
| |
| /* This page contains functions that return info about |
| (struct value) values used in GDB. */ |
| |
| /* Returns non-zero if the value VAL represents a true value. */ |
| int |
| value_true (val) |
| value_ptr val; |
| { |
| /* It is possible that we should have some sort of error if a non-boolean |
| value is used in this context. Possibly dependent on some kind of |
| "boolean-checking" option like range checking. But it should probably |
| not depend on the language except insofar as is necessary to identify |
| a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean |
| should be an error, probably). */ |
| return !value_logical_not (val); |
| } |
| |
| /* Returns non-zero if the operator OP is defined on |
| the values ARG1 and ARG2. */ |
| |
| #if 0 /* Currently unused */ |
| |
| void |
| binop_type_check (arg1, arg2, op) |
| value_ptr arg1, arg2; |
| int op; |
| { |
| struct type *t1, *t2; |
| |
| /* If we're not checking types, always return success. */ |
| if (!STRICT_TYPE) |
| return; |
| |
| t1 = VALUE_TYPE (arg1); |
| if (arg2 != NULL) |
| t2 = VALUE_TYPE (arg2); |
| else |
| t2 = NULL; |
| |
| switch (op) |
| { |
| case BINOP_ADD: |
| case BINOP_SUB: |
| if ((numeric_type (t1) && pointer_type (t2)) || |
| (pointer_type (t1) && numeric_type (t2))) |
| { |
| warning ("combining pointer and integer.\n"); |
| break; |
| } |
| case BINOP_MUL: |
| case BINOP_LSH: |
| case BINOP_RSH: |
| if (!numeric_type (t1) || !numeric_type (t2)) |
| type_op_error ("Arguments to %s must be numbers.", op); |
| else if (!same_type (t1, t2)) |
| type_op_error ("Arguments to %s must be of the same type.", op); |
| break; |
| |
| case BINOP_LOGICAL_AND: |
| case BINOP_LOGICAL_OR: |
| if (!boolean_type (t1) || !boolean_type (t2)) |
| type_op_error ("Arguments to %s must be of boolean type.", op); |
| break; |
| |
| case BINOP_EQUAL: |
| if ((pointer_type (t1) && !(pointer_type (t2) || integral_type (t2))) || |
| (pointer_type (t2) && !(pointer_type (t1) || integral_type (t1)))) |
| type_op_error ("A pointer can only be compared to an integer or pointer.", op); |
| else if ((pointer_type (t1) && integral_type (t2)) || |
| (integral_type (t1) && pointer_type (t2))) |
| { |
| warning ("combining integer and pointer.\n"); |
| break; |
| } |
| else if (!simple_type (t1) || !simple_type (t2)) |
| type_op_error ("Arguments to %s must be of simple type.", op); |
| else if (!same_type (t1, t2)) |
| type_op_error ("Arguments to %s must be of the same type.", op); |
| break; |
| |
| case BINOP_REM: |
| case BINOP_MOD: |
| if (!integral_type (t1) || !integral_type (t2)) |
| type_op_error ("Arguments to %s must be of integral type.", op); |
| break; |
| |
| case BINOP_LESS: |
| case BINOP_GTR: |
| case BINOP_LEQ: |
| case BINOP_GEQ: |
| if (!ordered_type (t1) || !ordered_type (t2)) |
| type_op_error ("Arguments to %s must be of ordered type.", op); |
| else if (!same_type (t1, t2)) |
| type_op_error ("Arguments to %s must be of the same type.", op); |
| break; |
| |
| case BINOP_ASSIGN: |
| if (pointer_type (t1) && !integral_type (t2)) |
| type_op_error ("A pointer can only be assigned an integer.", op); |
| else if (pointer_type (t1) && integral_type (t2)) |
| { |
| warning ("combining integer and pointer."); |
| break; |
| } |
| else if (!simple_type (t1) || !simple_type (t2)) |
| type_op_error ("Arguments to %s must be of simple type.", op); |
| else if (!same_type (t1, t2)) |
| type_op_error ("Arguments to %s must be of the same type.", op); |
| break; |
| |
| case BINOP_CONCAT: |
| /* FIXME: Needs to handle bitstrings as well. */ |
| if (!(string_type (t1) || character_type (t1) || integral_type (t1)) |
| || !(string_type (t2) || character_type (t2) || integral_type (t2))) |
| type_op_error ("Arguments to %s must be strings or characters.", op); |
| break; |
| |
| /* Unary checks -- arg2 is null */ |
| |
| case UNOP_LOGICAL_NOT: |
| if (!boolean_type (t1)) |
| type_op_error ("Argument to %s must be of boolean type.", op); |
| break; |
| |
| case UNOP_PLUS: |
| case UNOP_NEG: |
| if (!numeric_type (t1)) |
| type_op_error ("Argument to %s must be of numeric type.", op); |
| break; |
| |
| case UNOP_IND: |
| if (integral_type (t1)) |
| { |
| warning ("combining pointer and integer.\n"); |
| break; |
| } |
| else if (!pointer_type (t1)) |
| type_op_error ("Argument to %s must be a pointer.", op); |
| break; |
| |
| case UNOP_PREINCREMENT: |
| case UNOP_POSTINCREMENT: |
| case UNOP_PREDECREMENT: |
| case UNOP_POSTDECREMENT: |
| if (!ordered_type (t1)) |
| type_op_error ("Argument to %s must be of an ordered type.", op); |
| break; |
| |
| default: |
| /* Ok. The following operators have different meanings in |
| different languages. */ |
| switch (current_language->la_language) |
| { |
| #ifdef _LANG_c |
| case language_c: |
| case language_cplus: |
| switch (op) |
| { |
| case BINOP_DIV: |
| if (!numeric_type (t1) || !numeric_type (t2)) |
| type_op_error ("Arguments to %s must be numbers.", op); |
| break; |
| } |
| break; |
| #endif |
| |
| #ifdef _LANG_m2 |
| case language_m2: |
| switch (op) |
| { |
| case BINOP_DIV: |
| if (!float_type (t1) || !float_type (t2)) |
| type_op_error ("Arguments to %s must be floating point numbers.", op); |
| break; |
| case BINOP_INTDIV: |
| if (!integral_type (t1) || !integral_type (t2)) |
| type_op_error ("Arguments to %s must be of integral type.", op); |
| break; |
| } |
| #endif |
| |
| #ifdef _LANG_chill |
| case language_chill: |
| error ("Missing Chill support in function binop_type_check."); /*FIXME */ |
| #endif |
| |
| } |
| } |
| } |
| |
| #endif /* 0 */ |
| |
| |
| /* This page contains functions for the printing out of |
| error messages that occur during type- and range- |
| checking. */ |
| |
| /* Prints the format string FMT with the operator as a string |
| corresponding to the opcode OP. If FATAL is non-zero, then |
| this is an error and error () is called. Otherwise, it is |
| a warning and printf() is called. */ |
| void |
| op_error (fmt, op, fatal) |
| char *fmt; |
| enum exp_opcode op; |
| int fatal; |
| { |
| if (fatal) |
| error (fmt, op_string (op)); |
| else |
| { |
| warning (fmt, op_string (op)); |
| } |
| } |
| |
| /* These are called when a language fails a type- or range-check. |
| The first argument should be a printf()-style format string, and |
| the rest of the arguments should be its arguments. If |
| [type|range]_check is [type|range]_check_on, then return_to_top_level() |
| is called in the style of error (). Otherwise, the message is prefixed |
| by the value of warning_pre_print and we do not return to the top level. */ |
| |
| void |
| type_error (char *string,...) |
| { |
| va_list args; |
| va_start (args, string); |
| |
| if (type_check == type_check_warn) |
| fprintf_filtered (gdb_stderr, warning_pre_print); |
| else |
| error_begin (); |
| |
| vfprintf_filtered (gdb_stderr, string, args); |
| fprintf_filtered (gdb_stderr, "\n"); |
| va_end (args); |
| if (type_check == type_check_on) |
| return_to_top_level (RETURN_ERROR); |
| } |
| |
| void |
| range_error (char *string,...) |
| { |
| va_list args; |
| va_start (args, string); |
| |
| if (range_check == range_check_warn) |
| fprintf_filtered (gdb_stderr, warning_pre_print); |
| else |
| error_begin (); |
| |
| vfprintf_filtered (gdb_stderr, string, args); |
| fprintf_filtered (gdb_stderr, "\n"); |
| va_end (args); |
| if (range_check == range_check_on) |
| return_to_top_level (RETURN_ERROR); |
| } |
| |
| |
| /* This page contains miscellaneous functions */ |
| |
| /* Return the language enum for a given language string. */ |
| |
| enum language |
| language_enum (str) |
| char *str; |
| { |
| int i; |
| |
| for (i = 0; i < languages_size; i++) |
| if (STREQ (languages[i]->la_name, str)) |
| return languages[i]->la_language; |
| |
| return language_unknown; |
| } |
| |
| /* Return the language struct for a given language enum. */ |
| |
| const struct language_defn * |
| language_def (lang) |
| enum language lang; |
| { |
| int i; |
| |
| for (i = 0; i < languages_size; i++) |
| { |
| if (languages[i]->la_language == lang) |
| { |
| return languages[i]; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Return the language as a string */ |
| char * |
| language_str (lang) |
| enum language lang; |
| { |
| int i; |
| |
| for (i = 0; i < languages_size; i++) |
| { |
| if (languages[i]->la_language == lang) |
| { |
| return languages[i]->la_name; |
| } |
| } |
| return "Unknown"; |
| } |
| |
| static void |
| set_check (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| printf_unfiltered ( |
| "\"set check\" must be followed by the name of a check subcommand.\n"); |
| help_list (setchecklist, "set check ", -1, gdb_stdout); |
| } |
| |
| static void |
| show_check (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| cmd_show_list (showchecklist, from_tty, ""); |
| } |
| |
| /* Add a language to the set of known languages. */ |
| |
| void |
| add_language (lang) |
| const struct language_defn *lang; |
| { |
| if (lang->la_magic != LANG_MAGIC) |
| { |
| fprintf_unfiltered (gdb_stderr, "Magic number of %s language struct wrong\n", |
| lang->la_name); |
| abort (); |
| } |
| |
| if (!languages) |
| { |
| languages_allocsize = DEFAULT_ALLOCSIZE; |
| languages = (const struct language_defn **) xmalloc |
| (languages_allocsize * sizeof (*languages)); |
| } |
| if (languages_size >= languages_allocsize) |
| { |
| languages_allocsize *= 2; |
| languages = (const struct language_defn **) xrealloc ((char *) languages, |
| languages_allocsize * sizeof (*languages)); |
| } |
| languages[languages_size++] = lang; |
| } |
| |
| /* Define the language that is no language. */ |
| |
| static int |
| unk_lang_parser () |
| { |
| return 1; |
| } |
| |
| static void |
| unk_lang_error (msg) |
| char *msg; |
| { |
| error ("Attempted to parse an expression with unknown language"); |
| } |
| |
| static void |
| unk_lang_emit_char (c, stream, quoter) |
| register int c; |
| GDB_FILE *stream; |
| int quoter; |
| { |
| error ("internal error - unimplemented function unk_lang_emit_char called."); |
| } |
| |
| static void |
| unk_lang_printchar (c, stream) |
| register int c; |
| GDB_FILE *stream; |
| { |
| error ("internal error - unimplemented function unk_lang_printchar called."); |
| } |
| |
| static void |
| unk_lang_printstr (stream, string, length, width, force_ellipses) |
| GDB_FILE *stream; |
| char *string; |
| unsigned int length; |
| int width; |
| int force_ellipses; |
| { |
| error ("internal error - unimplemented function unk_lang_printstr called."); |
| } |
| |
| static struct type * |
| unk_lang_create_fundamental_type (objfile, typeid) |
| struct objfile *objfile; |
| int typeid; |
| { |
| error ("internal error - unimplemented function unk_lang_create_fundamental_type called."); |
| } |
| |
| static void |
| unk_lang_print_type (type, varstring, stream, show, level) |
| struct type *type; |
| char *varstring; |
| GDB_FILE *stream; |
| int show; |
| int level; |
| { |
| error ("internal error - unimplemented function unk_lang_print_type called."); |
| } |
| |
| static int |
| unk_lang_val_print (type, valaddr, embedded_offset, address, stream, format, deref_ref, |
| recurse, pretty) |
| struct type *type; |
| char *valaddr; |
| int embedded_offset; |
| CORE_ADDR address; |
| GDB_FILE *stream; |
| int format; |
| int deref_ref; |
| int recurse; |
| enum val_prettyprint pretty; |
| { |
| error ("internal error - unimplemented function unk_lang_val_print called."); |
| } |
| |
| static int |
| unk_lang_value_print (val, stream, format, pretty) |
| value_ptr val; |
| GDB_FILE *stream; |
| int format; |
| enum val_prettyprint pretty; |
| { |
| error ("internal error - unimplemented function unk_lang_value_print called."); |
| } |
| |
| static struct type **CONST_PTR (unknown_builtin_types[]) = |
| { |
| 0 |
| }; |
| static const struct op_print unk_op_print_tab[] = |
| { |
| {NULL, OP_NULL, PREC_NULL, 0} |
| }; |
| |
| const struct language_defn unknown_language_defn = |
| { |
| "unknown", |
| language_unknown, |
| &unknown_builtin_types[0], |
| range_check_off, |
| type_check_off, |
| unk_lang_parser, |
| unk_lang_error, |
| evaluate_subexp_standard, |
| unk_lang_printchar, /* Print character constant */ |
| unk_lang_printstr, |
| unk_lang_emit_char, |
| unk_lang_create_fundamental_type, |
| unk_lang_print_type, /* Print a type using appropriate syntax */ |
| unk_lang_val_print, /* Print a value using appropriate syntax */ |
| unk_lang_value_print, /* Print a top-level value */ |
| {"", "", "", ""}, /* Binary format info */ |
| {"0%lo", "0", "o", ""}, /* Octal format info */ |
| {"%ld", "", "d", ""}, /* Decimal format info */ |
| {"0x%lx", "0x", "x", ""}, /* Hex format info */ |
| unk_op_print_tab, /* expression operators for printing */ |
| 1, /* c-style arrays */ |
| 0, /* String lower bound */ |
| &builtin_type_char, /* Type of string elements */ |
| LANG_MAGIC |
| }; |
| |
| /* These two structs define fake entries for the "local" and "auto" options. */ |
| const struct language_defn auto_language_defn = |
| { |
| "auto", |
| language_auto, |
| &unknown_builtin_types[0], |
| range_check_off, |
| type_check_off, |
| unk_lang_parser, |
| unk_lang_error, |
| evaluate_subexp_standard, |
| unk_lang_printchar, /* Print character constant */ |
| unk_lang_printstr, |
| unk_lang_emit_char, |
| unk_lang_create_fundamental_type, |
| unk_lang_print_type, /* Print a type using appropriate syntax */ |
| unk_lang_val_print, /* Print a value using appropriate syntax */ |
| unk_lang_value_print, /* Print a top-level value */ |
| {"", "", "", ""}, /* Binary format info */ |
| {"0%lo", "0", "o", ""}, /* Octal format info */ |
| {"%ld", "", "d", ""}, /* Decimal format info */ |
| {"0x%lx", "0x", "x", ""}, /* Hex format info */ |
| unk_op_print_tab, /* expression operators for printing */ |
| 1, /* c-style arrays */ |
| 0, /* String lower bound */ |
| &builtin_type_char, /* Type of string elements */ |
| LANG_MAGIC |
| }; |
| |
| const struct language_defn local_language_defn = |
| { |
| "local", |
| language_auto, |
| &unknown_builtin_types[0], |
| range_check_off, |
| type_check_off, |
| unk_lang_parser, |
| unk_lang_error, |
| evaluate_subexp_standard, |
| unk_lang_printchar, /* Print character constant */ |
| unk_lang_printstr, |
| unk_lang_emit_char, |
| unk_lang_create_fundamental_type, |
| unk_lang_print_type, /* Print a type using appropriate syntax */ |
| unk_lang_val_print, /* Print a value using appropriate syntax */ |
| unk_lang_value_print, /* Print a top-level value */ |
| {"", "", "", ""}, /* Binary format info */ |
| {"0%lo", "0", "o", ""}, /* Octal format info */ |
| {"%ld", "", "d", ""}, /* Decimal format info */ |
| {"0x%lx", "0x", "x", ""}, /* Hex format info */ |
| unk_op_print_tab, /* expression operators for printing */ |
| 1, /* c-style arrays */ |
| 0, /* String lower bound */ |
| &builtin_type_char, /* Type of string elements */ |
| LANG_MAGIC |
| }; |
| |
| /* Initialize the language routines */ |
| |
| void |
| _initialize_language () |
| { |
| struct cmd_list_element *set, *show; |
| |
| /* GDB commands for language specific stuff */ |
| |
| set = add_set_cmd ("language", class_support, var_string_noescape, |
| (char *) &language, |
| "Set the current source language.", |
| &setlist); |
| show = add_show_from_set (set, &showlist); |
| set->function.cfunc = set_language_command; |
| show->function.cfunc = show_language_command; |
| |
| add_prefix_cmd ("check", no_class, set_check, |
| "Set the status of the type/range checker", |
| &setchecklist, "set check ", 0, &setlist); |
| add_alias_cmd ("c", "check", no_class, 1, &setlist); |
| add_alias_cmd ("ch", "check", no_class, 1, &setlist); |
| |
| add_prefix_cmd ("check", no_class, show_check, |
| "Show the status of the type/range checker", |
| &showchecklist, "show check ", 0, &showlist); |
| add_alias_cmd ("c", "check", no_class, 1, &showlist); |
| add_alias_cmd ("ch", "check", no_class, 1, &showlist); |
| |
| set = add_set_cmd ("type", class_support, var_string_noescape, |
| (char *) &type, |
| "Set type checking. (on/warn/off/auto)", |
| &setchecklist); |
| show = add_show_from_set (set, &showchecklist); |
| set->function.cfunc = set_type_command; |
| show->function.cfunc = show_type_command; |
| |
| set = add_set_cmd ("range", class_support, var_string_noescape, |
| (char *) &range, |
| "Set range checking. (on/warn/off/auto)", |
| &setchecklist); |
| show = add_show_from_set (set, &showchecklist); |
| set->function.cfunc = set_range_command; |
| show->function.cfunc = show_range_command; |
| |
| add_language (&unknown_language_defn); |
| add_language (&local_language_defn); |
| add_language (&auto_language_defn); |
| |
| language = savestring ("auto", strlen ("auto")); |
| range = savestring ("auto", strlen ("auto")); |
| type = savestring ("auto", strlen ("auto")); |
| |
| /* Have the above take effect */ |
| |
| set_language_command (language, 0); |
| set_type_command (NULL, 0); |
| set_range_command (NULL, 0); |
| } |