| 1 | /* Source-language-related definitions for GDB. |
| 2 | Copyright 1991, 1992 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 | #if !defined (LANGUAGE_H) |
| 23 | #define LANGUAGE_H 1 |
| 24 | |
| 25 | #ifdef __STDC__ /* Forward decls for prototypes */ |
| 26 | struct value; |
| 27 | /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */ |
| 28 | #endif |
| 29 | |
| 30 | /* This used to be included to configure GDB for one or more specific |
| 31 | languages. Now it is shortcutted to configure for all of them. FIXME. */ |
| 32 | /* #include "lang_def.h" */ |
| 33 | #define _LANG_c |
| 34 | #define _LANG_m2 |
| 35 | |
| 36 | /* range_mode == |
| 37 | range_mode_auto: range_check set automatically to default of language. |
| 38 | range_mode_manual: range_check set manually by user. */ |
| 39 | |
| 40 | extern enum range_mode {range_mode_auto, range_mode_manual} range_mode; |
| 41 | |
| 42 | /* range_check == |
| 43 | range_check_on: Ranges are checked in GDB expressions, producing errors. |
| 44 | range_check_warn: Ranges are checked, producing warnings. |
| 45 | range_check_off: Ranges are not checked in GDB expressions. */ |
| 46 | |
| 47 | extern enum range_check |
| 48 | {range_check_off, range_check_warn, range_check_on} range_check; |
| 49 | |
| 50 | /* type_mode == |
| 51 | type_mode_auto: type_check set automatically to default of language |
| 52 | type_mode_manual: type_check set manually by user. */ |
| 53 | |
| 54 | extern enum type_mode {type_mode_auto, type_mode_manual} type_mode; |
| 55 | |
| 56 | /* type_check == |
| 57 | type_check_on: Types are checked in GDB expressions, producing errors. |
| 58 | type_check_warn: Types are checked, producing warnings. |
| 59 | type_check_off: Types are not checked in GDB expressions. */ |
| 60 | |
| 61 | extern enum type_check |
| 62 | {type_check_off, type_check_warn, type_check_on} type_check; |
| 63 | \f |
| 64 | /* Structure tying together assorted information about a language. */ |
| 65 | |
| 66 | struct language_defn { |
| 67 | char * la_name; /* Name of the language */ |
| 68 | enum language la_language; /* its symtab language-enum (defs.h) */ |
| 69 | struct type ** const |
| 70 | *la_builtin_type_vector; /* Its builtin types */ |
| 71 | enum range_check la_range_check; /* Default range checking */ |
| 72 | enum type_check la_type_check; /* Default type checking */ |
| 73 | int (*la_parser) PARAMS((void)); /* Parser function */ |
| 74 | void (*la_error) PARAMS ((char *)); /* Parser error function */ |
| 75 | struct type **la_longest_int; /* Longest signed integral type */ |
| 76 | struct type **la_longest_unsigned_int; /* Longest uns integral type */ |
| 77 | struct type **la_longest_float; /* Longest floating point type */ |
| 78 | char *la_hex_format; /* Hexadecimal printf format str */ |
| 79 | char *la_hex_format_pre; /* Prefix for custom format string */ |
| 80 | char *la_hex_format_suf; /* Suffix for custom format string */ |
| 81 | char *la_octal_format; /* Octal printf format str */ |
| 82 | char *la_octal_format_pre; /* Prefix for custom format string */ |
| 83 | char *la_octal_format_suf; /* Suffix for custom format string */ |
| 84 | const struct op_print |
| 85 | *la_op_print_tab; /* Table for printing expressions */ |
| 86 | /* Add fields above this point, so the magic number is always last. */ |
| 87 | long la_magic; /* Magic number for compat checking */ |
| 88 | }; |
| 89 | |
| 90 | #define LANG_MAGIC 910823L |
| 91 | |
| 92 | /* Pointer to the language_defn for our current language. This pointer |
| 93 | always points to *some* valid struct; it can be used without checking |
| 94 | it for validity. */ |
| 95 | |
| 96 | extern const struct language_defn *current_language; |
| 97 | |
| 98 | /* language_mode == |
| 99 | language_mode_auto: current_language automatically set upon selection |
| 100 | of scope (e.g. stack frame) |
| 101 | language_mode_manual: current_language set only by user. */ |
| 102 | |
| 103 | extern enum language_mode |
| 104 | {language_mode_auto, language_mode_manual} language_mode; |
| 105 | \f |
| 106 | /* These macros define the behaviour of the expression |
| 107 | evaluator. */ |
| 108 | |
| 109 | /* Should we strictly type check expressions? */ |
| 110 | #define STRICT_TYPE (type_check != type_check_off) |
| 111 | |
| 112 | /* Should we range check values against the domain of their type? */ |
| 113 | #define RANGE_CHECK (range_check != range_check_off) |
| 114 | |
| 115 | /* "cast" really means conversion */ |
| 116 | /* FIXME -- should be a setting in language_defn */ |
| 117 | #define CAST_IS_CONVERSION (current_language->la_language == language_c) |
| 118 | |
| 119 | extern void |
| 120 | language_info PARAMS ((int)); |
| 121 | |
| 122 | extern void |
| 123 | set_language PARAMS ((enum language)); |
| 124 | |
| 125 | \f |
| 126 | /* This page contains functions that return things that are |
| 127 | specific to languages. Each of these functions is based on |
| 128 | the current setting of working_lang, which the user sets |
| 129 | with the "set language" command. */ |
| 130 | |
| 131 | /* Returns some built-in types */ |
| 132 | #define longest_int() (*current_language->la_longest_int) |
| 133 | #define longest_unsigned_int() (*current_language->la_longest_unsigned_int) |
| 134 | #define longest_float() (*current_language->la_longest_float) |
| 135 | |
| 136 | /* Hexadecimal number formatting is in defs.h because it is so common |
| 137 | throughout GDB. */ |
| 138 | |
| 139 | /* Return a format string for printf that will print a number in the local |
| 140 | (language-specific) octal format. Result is static and is |
| 141 | overwritten by the next call. local_octal_format_custom takes printf |
| 142 | options like "08" or "l" (to produce e.g. %08x or %lx). */ |
| 143 | |
| 144 | #define local_octal_format() (current_language->la_octal_format) |
| 145 | |
| 146 | extern char * |
| 147 | local_octal_format_custom PARAMS ((char *)); |
| 148 | |
| 149 | /* Type predicates */ |
| 150 | |
| 151 | extern int |
| 152 | simple_type PARAMS ((struct type *)); |
| 153 | |
| 154 | extern int |
| 155 | ordered_type PARAMS ((struct type *)); |
| 156 | |
| 157 | extern int |
| 158 | same_type PARAMS ((struct type *, struct type *)); |
| 159 | |
| 160 | extern int |
| 161 | integral_type PARAMS ((struct type *)); |
| 162 | |
| 163 | extern int |
| 164 | numeric_type PARAMS ((struct type *)); |
| 165 | |
| 166 | extern int |
| 167 | character_type PARAMS ((struct type *)); |
| 168 | |
| 169 | extern int |
| 170 | boolean_type PARAMS ((struct type *)); |
| 171 | |
| 172 | extern int |
| 173 | float_type PARAMS ((struct type *)); |
| 174 | |
| 175 | extern int |
| 176 | pointer_type PARAMS ((struct type *)); |
| 177 | |
| 178 | extern int |
| 179 | structured_type PARAMS ((struct type *)); |
| 180 | |
| 181 | /* Checks Binary and Unary operations for semantic type correctness */ |
| 182 | /* FIXME: Does not appear to be used */ |
| 183 | #define unop_type_check(v,o) binop_type_check((v),NULL,(o)) |
| 184 | |
| 185 | extern void |
| 186 | binop_type_check PARAMS ((struct value *, struct value *, int)); |
| 187 | |
| 188 | /* Error messages */ |
| 189 | |
| 190 | extern void |
| 191 | op_error PARAMS ((char *fmt, enum exp_opcode, int)); |
| 192 | |
| 193 | #define type_op_error(f,o) \ |
| 194 | op_error((f),(o),type_check==type_check_on ? 1 : 0) |
| 195 | #define range_op_error(f,o) \ |
| 196 | op_error((f),(o),range_check==range_check_on ? 1 : 0) |
| 197 | |
| 198 | extern void |
| 199 | type_error (); |
| 200 | |
| 201 | void |
| 202 | range_error (); |
| 203 | |
| 204 | /* Data: Does this value represent "truth" to the current language? */ |
| 205 | |
| 206 | extern int |
| 207 | value_true PARAMS ((struct value *)); |
| 208 | |
| 209 | /* Misc: The string representing a particular enum language. */ |
| 210 | |
| 211 | extern char * |
| 212 | language_str PARAMS ((enum language)); |
| 213 | |
| 214 | /* Add a language to the set known by GDB (at initialization time). */ |
| 215 | |
| 216 | extern void |
| 217 | add_language PARAMS ((const struct language_defn *)); |
| 218 | |
| 219 | extern enum language |
| 220 | get_frame_language PARAMS ((void)); /* In stack.c */ |
| 221 | |
| 222 | #endif /* defined (LANGUAGE_H) */ |