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- /* 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., 675 Mass Ave, Cambridge, MA 02139, 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 <string.h>
- #include <varargs.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"
-
- 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));
-
- /* 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 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 3
-
- /* 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;
-
- /* FIXME -- do this from the list, with HELP. */
- if (!language || !language[0]) {
- printf("The currently understood settings are:\n\n\
- local or auto Automatic setting based on source file\n\
- c Use the C language\n\
- c++ Use the C++ language\n\
- modula-2 Use the Modula-2 language\n");
- /* 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 (!strcmp (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);
- return;
- } else {
- /* Enter manual mode. Set the specified language. */
- language_mode = language_mode_manual;
- current_language = languages[i];
- set_type_range ();
- set_lang_str();
- 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(
- "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 (!strcmp(type,"on"))
- {
- type_check = type_check_on;
- type_mode = type_mode_manual;
- }
- else if (!strcmp(type,"warn"))
- {
- type_check = type_check_warn;
- type_mode = type_mode_manual;
- }
- else if (!strcmp(type,"off"))
- {
- type_check = type_check_off;
- type_mode = type_mode_manual;
- }
- else if (!strcmp(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(
- "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 (!strcmp(range,"on"))
- {
- range_check = range_check_on;
- range_mode = range_mode_manual;
- }
- else if (!strcmp(range,"warn"))
- {
- range_check = range_check_warn;
- range_mode = range_mode_manual;
- }
- else if (!strcmp(range,"off"))
- {
- range_check = range_check_off;
- range_mode = range_mode_manual;
- }
- else if (!strcmp(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. */
-
- void
- set_language(lang)
- enum language lang;
- {
- int i;
-
- for (i = 0; i < languages_size; i++) {
- if (languages[i]->la_language == lang) {
- current_language = languages[i];
- set_type_range ();
- set_lang_str();
- break;
- }
- }
- }
-
- /* 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;
- {
- /* FIXME: quietly is ignored at the moment. */
- printf("Current Language: %s\n",language);
- show_language_command((char *)0, 1);
- printf("Type checking: %s\n",type);
- show_type_command((char *)0, 1);
- printf("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 v1,v2;
- {
- int l1,l2,size,uns;
-
- l1 = TYPE_LENGTH(VALUE_TYPE(v1));
- l2 = TYPE_LENGTH(VALUE_TYPE(v2));
-
- switch(current_language->la_language)
- {
- case language_c:
- case language_cplus:
- if (TYPE_CODE(VALUE_TYPE(v1))==TYPE_CODE_FLT)
- return TYPE_CODE(VALUE_TYPE(v2)) == TYPE_CODE_FLT && l2 > l1 ?
- VALUE_TYPE(v2) : VALUE_TYPE(v1);
- else if (TYPE_CODE(VALUE_TYPE(v2))==TYPE_CODE_FLT)
- return TYPE_CODE(VALUE_TYPE(v1)) == TYPE_CODE_FLT && l1 > l2 ?
- VALUE_TYPE(v1) : VALUE_TYPE(v2);
- else if (TYPE_UNSIGNED(VALUE_TYPE(v1)) && l1 > l2)
- return VALUE_TYPE(v1);
- else if (TYPE_UNSIGNED(VALUE_TYPE(v2)) && 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;
- }
- 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, current_language->la_hex_format_pre);
- strcat (form, pre);
- strcat (form, current_language->la_hex_format_suf);
- 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)
- int num;
- {
- static char res[50];
-
- sprintf (res, current_language->la_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)
- int 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, current_language->la_octal_format_pre);
- strcat (form, pre);
- strcat (form, current_language->la_octal_format_suf);
- return form;
- }
-
- /* 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;
- {
- 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. */
- int
- ordered_type (type)
- struct type *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;
- {
- 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;
- {
- 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;
- default:
- error ("Language not supported.");
- }
- }
-
- /* Returns non-zero if the value is numeric */
- int
- numeric_type (type)
- struct type *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;
- {
- switch(current_language->la_language)
- {
- 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;
- }
- return (0);
- }
-
- /* Returns non-zero if the value is a boolean type */
- int
- boolean_type (type)
- struct type *type;
- {
- switch(current_language->la_language)
- {
- case language_m2:
- return TYPE_CODE(type) != TYPE_CODE_BOOL ? 0 : 1;
-
- case language_c:
- case language_cplus:
- return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1;
- }
- return (0);
- }
-
- /* Returns non-zero if the value is a floating-point type */
- int
- float_type (type)
- struct type *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;
- {
- 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);
- }
- return (0);
- }
-
- /* 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 val;
- {
- int len, i;
- struct type *type;
- LONGEST v;
-
- switch (current_language->la_language) {
-
- case language_c:
- case language_cplus:
- return !value_zerop (val);
-
- case language_m2:
- type = VALUE_TYPE(val);
- if (TYPE_CODE (type) != TYPE_CODE_BOOL)
- return 0; /* Not a BOOLEAN at all */
- /* Search the fields for one that matches the current value. */
- len = TYPE_NFIELDS (type);
- v = value_as_long (val);
- for (i = 0; i < len; i++)
- {
- QUIT;
- if (v == TYPE_FIELD_BITPOS (type, i))
- break;
- }
- if (i >= len)
- return 0; /* Not a valid BOOLEAN value */
- if (!strcmp ("TRUE", TYPE_FIELD_NAME(VALUE_TYPE(val), i)))
- return 1; /* BOOLEAN with value TRUE */
- else
- return 0; /* BOOLEAN with value FALSE */
- break;
-
- default:
- error ("Language not supported.");
- }
- }
-
- /* 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 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!=(value)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_AND:
- case BINOP_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:
- 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;
-
- /* Unary checks -- arg2 is null */
-
- case UNOP_ZEROP:
- 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
- }
- }
- }
-
- #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 (va_alist)
- va_dcl
- {
- va_list args;
- char *string;
-
- if (type_check==type_check_warn)
- fprintf(stderr,warning_pre_print);
- else
- target_terminal_ours();
-
- va_start (args);
- string = va_arg (args, char *);
- vfprintf (stderr, string, args);
- fprintf (stderr, "\n");
- va_end (args);
- if (type_check==type_check_on)
- return_to_top_level();
- }
-
- void
- range_error (va_alist)
- va_dcl
- {
- va_list args;
- char *string;
-
- if (range_check==range_check_warn)
- fprintf(stderr,warning_pre_print);
- else
- target_terminal_ours();
-
- va_start (args);
- string = va_arg (args, char *);
- vfprintf (stderr, string, args);
- fprintf (stderr, "\n");
- va_end (args);
- if (range_check==range_check_on)
- return_to_top_level();
- }
-
-
- /* This page contains miscellaneous functions */
-
- /* 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";
- }
-
- struct cmd_list_element *setchecklist = NULL;
- struct cmd_list_element *showchecklist = NULL;
-
- static void
- set_check (ignore, from_tty)
- char *ignore;
- int from_tty;
- {
- printf(
- "\"set check\" must be followed by the name of a check subcommand.\n");
- help_list(setchecklist, "set check ", -1, 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(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 struct type ** const (unknown_builtin_types[]) = { 0 };
- static const struct op_print unk_op_print_tab[] = { 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,
- &builtin_type_error, /* longest signed integral type */
- &builtin_type_error, /* longest unsigned integral type */
- &builtin_type_error, /* longest floating point type */
- "0x%x", "0x%", "x", /* Hex format, prefix, suffix */
- "0%o", "0%", "o", /* Octal format, prefix, suffix */
- unk_op_print_tab, /* expression operators for printing */
- 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,
- &builtin_type_error, /* longest signed integral type */
- &builtin_type_error, /* longest unsigned integral type */
- &builtin_type_error, /* longest floating point type */
- "0x%x", "0x%", "x", /* Hex format, prefix, suffix */
- "0%o", "0%", "o", /* Octal format, prefix, suffix */
- unk_op_print_tab, /* expression operators for printing */
- 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,
- &builtin_type_error, /* longest signed integral type */
- &builtin_type_error, /* longest unsigned integral type */
- &builtin_type_error, /* longest floating point type */
- "0x%x", "0x%", "x", /* Hex format, prefix, suffix */
- "0%o", "0%", "o", /* Octal format, prefix, suffix */
- unk_op_print_tab, /* expression operators for printing */
- 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);
- }
-