gdb/language.h

   1 /* Source-language-related definitions for GDB.
   2    Copyright 1991 Free Software Foundation, Inc.
   3    Contributed by the Department of Computer Science at the State University
   4    of New York at Buffalo.
   5
   6 This file is part of GDB.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 /* This used to be included to configure GDB for one or more specific
  23    languages.  Now it is shortcutted to configure for all of them.  FIXME.  */
  24 /* #include "lang_def.h" */
  25 #define _LANG_c
  26 #define _LANG_m2
  27
  28 /* range_mode ==
  29    range_mode_auto:   range_check set automatically to default of language.
  30    range_mode_manual: range_check set manually by user.  */
  31
  32 extern enum range_mode {range_mode_auto, range_mode_manual} range_mode;
  33
  34 /* range_check ==
  35    range_check_on:    Ranges are checked in GDB expressions, producing errors.
  36    range_check_warn:  Ranges are checked, producing warnings.
  37    range_check_off:   Ranges are not checked in GDB expressions.  */
  38
  39 extern enum range_check
  40   {range_check_off, range_check_warn, range_check_on} range_check;
  41
  42 /* type_mode ==
  43    type_mode_auto:   type_check set automatically to default of language
  44    type_mode_manual: type_check set manually by user. */
  45
  46 extern enum type_mode {type_mode_auto, type_mode_manual} type_mode;
  47
  48 /* type_check ==
  49    type_check_on:    Types are checked in GDB expressions, producing errors.
  50    type_check_warn:  Types are checked, producing warnings.
  51    type_check_off:   Types are not checked in GDB expressions.  */
  52
  53 extern enum type_check
  54   {type_check_off, type_check_warn, type_check_on} type_check;
  55 \f
  56 /* Structure tying together assorted information about a language.  */
  57
  58 struct language_defn {
  59   char *           la_name;             /* Name of the language */
  60   enum language    la_language;         /* its symtab language-enum (defs.h) */
  61   struct type ** const
  62                   *la_builtin_type_vector;  /* Its builtin types */
  63   enum range_check la_range_check;      /* Default range checking */
  64   enum type_check  la_type_check;       /* Default type checking */
  65   int            (*la_parser)();        /* Parser function */
  66   void           (*la_error)();         /* Parser error function */
  67   struct type    **la_longest_int;      /* Longest signed integral type */
  68   struct type    **la_longest_unsigned_int; /* Longest uns integral type */
  69   struct type    **la_longest_float;    /* Longest floating point type */
  70   char            *la_hex_format;       /* Hexadecimal printf format str */
  71   char            *la_hex_format_pre;   /* Prefix for custom format string */
  72   char            *la_hex_format_suf;   /* Suffix for custom format string */
  73   char            *la_octal_format;     /* Octal printf format str */
  74   char            *la_octal_format_pre; /* Prefix for custom format string */
  75   char            *la_octal_format_suf; /* Suffix for custom format string */
  76 const struct op_print
  77                   *la_op_print_tab;     /* Table for printing expressions */
  78 /* Add fields above this point, so the magic number is always last. */
  79   long             la_magic;            /* Magic number for compat checking */
  80 };
  81
  82 #define LANG_MAGIC      910823L
  83
  84 /* Pointer to the language_defn for our current language.  This pointer
  85    always points to *some* valid struct; it can be used without checking
  86    it for validity.  */
  87
  88 extern struct language_defn *current_language;
  89
  90 /* language_mode ==
  91    language_mode_auto:   current_language automatically set upon selection
  92                          of scope (e.g. stack frame)
  93    language_mode_manual: current_language set only by user.  */
  94
  95 extern enum language_mode
  96   {language_mode_auto, language_mode_manual} language_mode;
  97 \f
  98 /* These macros define the behaviour of the expression
  99    evaluator.  */
 100
 101 /* Should we strictly type check expressions? */
 102 #define STRICT_TYPE (type_check != type_check_off)
 103
 104 /* Should we range check values against the domain of their type? */
 105 #define RANGE_CHECK (range_check != range_check_off)
 106
 107 /* "cast" really means conversion */
 108 /* FIXME -- should be a setting in language_defn */
 109 #define CAST_IS_CONVERSION (current_language->la_language == language_c)
 110
 111 void language_info();
 112 void set_language();
 113 \f
 114 /* This page contains functions that return things that are
 115    specific to languages.  Each of these functions is based on
 116    the current setting of working_lang, which the user sets
 117    with the "set language" command. */
 118
 119 /* Returns some built-in types */
 120 #define longest_int()           (*current_language->la_longest_int)
 121 #define longest_unsigned_int()  (*current_language->la_longest_unsigned_int)
 122 #define longest_float()         (*current_language->la_longest_float)
 123 struct type *binop_result_type();
 124
 125 /* Hexadecimal number formatting is in defs.h because it is so common
 126    throughout GDB.  */
 127
 128 /* Return a format string for printf that will print a number in the local
 129    (language-specific) octal format.  Result is static and is
 130    overwritten by the next call.  local_octal_format_custom takes printf
 131    options like "08" or "l" (to produce e.g. %08x or %lx).  */
 132
 133 #define local_octal_format() (current_language->la_octal_format)
 134 char *local_octal_format_custom();
 135
 136 /* Type predicates */
 137 int simple_type();
 138 int ordered_type();
 139 int same_type();
 140 int integral_type();
 141 int numeric_type();
 142 int character_type();
 143 int boolean_type();
 144 int float_type();
 145 int pointer_type();
 146 int structured_type();
 147
 148 /* Checks Binary and Unary operations for semantic type correctness */
 149 void binop_type_check();
 150 #define unop_type_check(v,o) binop_type_check((v),NULL,(o))
 151
 152 /* Error messages */
 153 void op_error();
 154 #define type_op_error(f,o) \
 155    op_error((f),(o),type_check==type_check_on ? 1 : 0)
 156 #define range_op_error(f,o) \
 157    op_error((f),(o),range_check==range_check_on ? 1 : 0)
 158 void type_error();
 159 void range_error();
 160
 161 /* Data:  Does this value represent "truth" to the current language?  */
 162 int value_true();
 163
 164 /* Misc:  The string representing a particular enum language.  */
 165 char *language_str();
 166
 167 /* Add a language to the set known by GDB (at initialization time).  */
 168 void add_language ();           /* Arg is &language_defn */
 169
 170 extern enum language get_frame_language ();     /* In stack.c */