| 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 | struct objfile; |
| 28 | /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */ |
| 29 | #endif |
| 30 | |
| 31 | /* This used to be included to configure GDB for one or more specific |
| 32 | languages. Now it is shortcutted to configure for all of them. FIXME. */ |
| 33 | /* #include "lang_def.h" */ |
| 34 | #define _LANG_c |
| 35 | #define _LANG_m2 |
| 36 | #define _LANG_chill |
| 37 | |
| 38 | /* range_mode == |
| 39 | range_mode_auto: range_check set automatically to default of language. |
| 40 | range_mode_manual: range_check set manually by user. */ |
| 41 | |
| 42 | extern enum range_mode {range_mode_auto, range_mode_manual} range_mode; |
| 43 | |
| 44 | /* range_check == |
| 45 | range_check_on: Ranges are checked in GDB expressions, producing errors. |
| 46 | range_check_warn: Ranges are checked, producing warnings. |
| 47 | range_check_off: Ranges are not checked in GDB expressions. */ |
| 48 | |
| 49 | extern enum range_check |
| 50 | {range_check_off, range_check_warn, range_check_on} range_check; |
| 51 | |
| 52 | /* type_mode == |
| 53 | type_mode_auto: type_check set automatically to default of language |
| 54 | type_mode_manual: type_check set manually by user. */ |
| 55 | |
| 56 | extern enum type_mode {type_mode_auto, type_mode_manual} type_mode; |
| 57 | |
| 58 | /* type_check == |
| 59 | type_check_on: Types are checked in GDB expressions, producing errors. |
| 60 | type_check_warn: Types are checked, producing warnings. |
| 61 | type_check_off: Types are not checked in GDB expressions. */ |
| 62 | |
| 63 | extern enum type_check |
| 64 | {type_check_off, type_check_warn, type_check_on} type_check; |
| 65 | \f |
| 66 | /* Information for doing language dependent formatting of printed values. */ |
| 67 | |
| 68 | struct language_format_info |
| 69 | { |
| 70 | /* The format that can be passed directly to standard C printf functions |
| 71 | to generate a completely formatted value in the format appropriate for |
| 72 | the language. */ |
| 73 | |
| 74 | char *la_format; |
| 75 | |
| 76 | /* The prefix to be used when directly printing a value, or constructing |
| 77 | a standard C printf format. This generally is everything up to the |
| 78 | conversion specification (the part introduced by the '%' character |
| 79 | and terminated by the conversion specifier character). */ |
| 80 | |
| 81 | char *la_format_prefix; |
| 82 | |
| 83 | /* The conversion specifier. This is generally everything after the |
| 84 | field width and precision, typically only a single character such |
| 85 | as 'o' for octal format or 'x' for hexadecimal format. */ |
| 86 | |
| 87 | char *la_format_specifier; |
| 88 | |
| 89 | /* The suffix to be used when directly printing a value, or constructing |
| 90 | a standard C printf format. This generally is everything after the |
| 91 | conversion specification (the part introduced by the '%' character |
| 92 | and terminated by the conversion specifier character). */ |
| 93 | |
| 94 | char *la_format_suffix; /* Suffix for custom format string */ |
| 95 | }; |
| 96 | |
| 97 | /* Structure tying together assorted information about a language. */ |
| 98 | |
| 99 | struct language_defn |
| 100 | { |
| 101 | /* Name of the language */ |
| 102 | |
| 103 | char *la_name; |
| 104 | |
| 105 | /* its symtab language-enum (defs.h) */ |
| 106 | |
| 107 | enum language la_language; |
| 108 | |
| 109 | /* Its builtin types */ |
| 110 | |
| 111 | struct type ** const *la_builtin_type_vector; |
| 112 | |
| 113 | /* Default range checking */ |
| 114 | |
| 115 | enum range_check la_range_check; |
| 116 | |
| 117 | /* Default type checking */ |
| 118 | |
| 119 | enum type_check la_type_check; |
| 120 | |
| 121 | /* Parser function. */ |
| 122 | |
| 123 | int (*la_parser) PARAMS((void)); |
| 124 | |
| 125 | /* Parser error function */ |
| 126 | |
| 127 | void (*la_error) PARAMS ((char *)); |
| 128 | |
| 129 | void (*la_printchar) PARAMS ((int, GDB_FILE *)); |
| 130 | |
| 131 | void (*la_printstr) PARAMS ((GDB_FILE *, char *, unsigned int, int)); |
| 132 | |
| 133 | struct type *(*la_fund_type) PARAMS ((struct objfile *, int)); |
| 134 | |
| 135 | /* Print a type using syntax appropriate for this language. */ |
| 136 | |
| 137 | void (*la_print_type) PARAMS ((struct type *, char *, GDB_FILE *, int, int)); |
| 138 | |
| 139 | /* Print a value using syntax appropriate for this language. */ |
| 140 | |
| 141 | int (*la_val_print) PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *, |
| 142 | int, int, int, enum val_prettyprint)); |
| 143 | |
| 144 | /* Longest signed integral type */ |
| 145 | |
| 146 | struct type **la_longest_int; |
| 147 | |
| 148 | /* Longest unsigned integral type */ |
| 149 | |
| 150 | struct type **la_longest_unsigned_int; |
| 151 | |
| 152 | /* Longest floating point type */ |
| 153 | |
| 154 | struct type **la_longest_float; |
| 155 | |
| 156 | /* Base 2 (binary) formats. */ |
| 157 | |
| 158 | struct language_format_info la_binary_format; |
| 159 | |
| 160 | /* Base 8 (octal) formats. */ |
| 161 | |
| 162 | struct language_format_info la_octal_format; |
| 163 | |
| 164 | /* Base 10 (decimal) formats */ |
| 165 | |
| 166 | struct language_format_info la_decimal_format; |
| 167 | |
| 168 | /* Base 16 (hexadecimal) formats */ |
| 169 | |
| 170 | struct language_format_info la_hex_format; |
| 171 | |
| 172 | |
| 173 | /* Table for printing expressions */ |
| 174 | |
| 175 | const struct op_print *la_op_print_tab; |
| 176 | |
| 177 | /* Add fields above this point, so the magic number is always last. */ |
| 178 | /* Magic number for compat checking */ |
| 179 | |
| 180 | long la_magic; |
| 181 | |
| 182 | }; |
| 183 | |
| 184 | #define LANG_MAGIC 910823L |
| 185 | |
| 186 | /* Pointer to the language_defn for our current language. This pointer |
| 187 | always points to *some* valid struct; it can be used without checking |
| 188 | it for validity. |
| 189 | |
| 190 | The current language affects expression parsing and evaluation |
| 191 | (FIXME: it might be cleaner to make the evaluation-related stuff |
| 192 | separate exp_opcodes for each different set of semantics. We |
| 193 | should at least think this through more clearly with respect to |
| 194 | what happens if the language is changed between parsing and |
| 195 | evaluation) and printing of things like types and arrays. It does |
| 196 | *not* affect symbol-reading-- each source file in a symbol-file has |
| 197 | its own language and we should keep track of that regardless of the |
| 198 | language when symbols are read. If we want some manual setting for |
| 199 | the language of symbol files (e.g. detecting when ".c" files are |
| 200 | C++), it should be a seprate setting from the current_language. */ |
| 201 | |
| 202 | extern const struct language_defn *current_language; |
| 203 | |
| 204 | /* Pointer to the language_defn expected by the user, e.g. the language |
| 205 | of main(), or the language we last mentioned in a message, or C. */ |
| 206 | |
| 207 | extern const struct language_defn *expected_language; |
| 208 | |
| 209 | /* language_mode == |
| 210 | language_mode_auto: current_language automatically set upon selection |
| 211 | of scope (e.g. stack frame) |
| 212 | language_mode_manual: current_language set only by user. */ |
| 213 | |
| 214 | extern enum language_mode |
| 215 | {language_mode_auto, language_mode_manual} language_mode; |
| 216 | \f |
| 217 | /* These macros define the behaviour of the expression |
| 218 | evaluator. */ |
| 219 | |
| 220 | /* Should we strictly type check expressions? */ |
| 221 | #define STRICT_TYPE (type_check != type_check_off) |
| 222 | |
| 223 | /* Should we range check values against the domain of their type? */ |
| 224 | #define RANGE_CHECK (range_check != range_check_off) |
| 225 | |
| 226 | /* "cast" really means conversion */ |
| 227 | /* FIXME -- should be a setting in language_defn */ |
| 228 | #define CAST_IS_CONVERSION (current_language->la_language == language_c || \ |
| 229 | current_language->la_language == language_cplus) |
| 230 | |
| 231 | extern void |
| 232 | language_info PARAMS ((int)); |
| 233 | |
| 234 | extern void |
| 235 | set_language PARAMS ((enum language)); |
| 236 | |
| 237 | \f |
| 238 | /* This page contains functions that return things that are |
| 239 | specific to languages. Each of these functions is based on |
| 240 | the current setting of working_lang, which the user sets |
| 241 | with the "set language" command. */ |
| 242 | |
| 243 | /* Returns some built-in types */ |
| 244 | #define longest_int() (*current_language->la_longest_int) |
| 245 | #define longest_unsigned_int() (*current_language->la_longest_unsigned_int) |
| 246 | #define longest_float() (*current_language->la_longest_float) |
| 247 | |
| 248 | #define create_fundamental_type(objfile,typeid) \ |
| 249 | (current_language->la_fund_type(objfile, typeid)) |
| 250 | |
| 251 | #define LA_PRINT_TYPE(type,varstring,stream,show,level) \ |
| 252 | (current_language->la_print_type(type,varstring,stream,show,level)) |
| 253 | |
| 254 | #define LA_VAL_PRINT(type,valaddr,addr,stream,fmt,deref,recurse,pretty) \ |
| 255 | (current_language->la_val_print(type,valaddr,addr,stream,fmt,deref, \ |
| 256 | recurse,pretty)) |
| 257 | |
| 258 | /* Return a format string for printf that will print a number in one of |
| 259 | the local (language-specific) formats. Result is static and is |
| 260 | overwritten by the next call. Takes printf options like "08" or "l" |
| 261 | (to produce e.g. %08x or %lx). */ |
| 262 | |
| 263 | #define local_binary_format() \ |
| 264 | (current_language->la_binary_format.la_format) |
| 265 | #define local_binary_format_prefix() \ |
| 266 | (current_language->la_binary_format.la_format_prefix) |
| 267 | #define local_binary_format_specifier() \ |
| 268 | (current_language->la_binary_format.la_format_specifier) |
| 269 | #define local_binary_format_suffix() \ |
| 270 | (current_language->la_binary_format.la_format_suffix) |
| 271 | |
| 272 | #define local_octal_format() \ |
| 273 | (current_language->la_octal_format.la_format) |
| 274 | #define local_octal_format_prefix() \ |
| 275 | (current_language->la_octal_format.la_format_prefix) |
| 276 | #define local_octal_format_specifier() \ |
| 277 | (current_language->la_octal_format.la_format_specifier) |
| 278 | #define local_octal_format_suffix() \ |
| 279 | (current_language->la_octal_format.la_format_suffix) |
| 280 | |
| 281 | #define local_decimal_format() \ |
| 282 | (current_language->la_decimal_format.la_format) |
| 283 | #define local_decimal_format_prefix() \ |
| 284 | (current_language->la_decimal_format.la_format_prefix) |
| 285 | #define local_decimal_format_specifier() \ |
| 286 | (current_language->la_decimal_format.la_format_specifier) |
| 287 | #define local_decimal_format_suffix() \ |
| 288 | (current_language->la_decimal_format.la_format_suffix) |
| 289 | |
| 290 | #define local_hex_format() \ |
| 291 | (current_language->la_hex_format.la_format) |
| 292 | #define local_hex_format_prefix() \ |
| 293 | (current_language->la_hex_format.la_format_prefix) |
| 294 | #define local_hex_format_specifier() \ |
| 295 | (current_language->la_hex_format.la_format_specifier) |
| 296 | #define local_hex_format_suffix() \ |
| 297 | (current_language->la_hex_format.la_format_suffix) |
| 298 | |
| 299 | #define LA_PRINT_CHAR(ch, stream) \ |
| 300 | (current_language->la_printchar(ch, stream)) |
| 301 | #define LA_PRINT_STRING(stream, string, length, force_ellipses) \ |
| 302 | (current_language->la_printstr(stream, string, length, force_ellipses)) |
| 303 | |
| 304 | /* Test a character to decide whether it can be printed in literal form |
| 305 | or needs to be printed in another representation. For example, |
| 306 | in C the literal form of the character with octal value 141 is 'a' |
| 307 | and the "other representation" is '\141'. The "other representation" |
| 308 | is program language dependent. */ |
| 309 | |
| 310 | #define PRINT_LITERAL_FORM(c) \ |
| 311 | ((c)>=0x20 && ((c)<0x7F || (c)>=0xA0) && (!sevenbit_strings || (c)<0x80)) |
| 312 | |
| 313 | /* Return a format string for printf that will print a number in one of |
| 314 | the local (language-specific) formats. Result is static and is |
| 315 | overwritten by the next call. Takes printf options like "08" or "l" |
| 316 | (to produce e.g. %08x or %lx). */ |
| 317 | |
| 318 | extern char * |
| 319 | local_decimal_format_custom PARAMS ((char *)); /* language.c */ |
| 320 | |
| 321 | extern char * |
| 322 | local_octal_format_custom PARAMS ((char *)); /* language.c */ |
| 323 | |
| 324 | extern char * |
| 325 | local_hex_format_custom PARAMS ((char *)); /* language.c */ |
| 326 | |
| 327 | /* Return a string that contains a number formatted in one of the local |
| 328 | (language-specific) formats. Result is static and is overwritten by |
| 329 | the next call. Takes printf options like "08" or "l". */ |
| 330 | |
| 331 | extern char * |
| 332 | local_hex_string PARAMS ((unsigned long)); /* language.c */ |
| 333 | |
| 334 | extern char * |
| 335 | local_hex_string_custom PARAMS ((unsigned long, char *)); /* language.c */ |
| 336 | |
| 337 | /* Type predicates */ |
| 338 | |
| 339 | extern int |
| 340 | simple_type PARAMS ((struct type *)); |
| 341 | |
| 342 | extern int |
| 343 | ordered_type PARAMS ((struct type *)); |
| 344 | |
| 345 | extern int |
| 346 | same_type PARAMS ((struct type *, struct type *)); |
| 347 | |
| 348 | extern int |
| 349 | integral_type PARAMS ((struct type *)); |
| 350 | |
| 351 | extern int |
| 352 | numeric_type PARAMS ((struct type *)); |
| 353 | |
| 354 | extern int |
| 355 | character_type PARAMS ((struct type *)); |
| 356 | |
| 357 | extern int |
| 358 | boolean_type PARAMS ((struct type *)); |
| 359 | |
| 360 | extern int |
| 361 | float_type PARAMS ((struct type *)); |
| 362 | |
| 363 | extern int |
| 364 | pointer_type PARAMS ((struct type *)); |
| 365 | |
| 366 | extern int |
| 367 | structured_type PARAMS ((struct type *)); |
| 368 | |
| 369 | /* Checks Binary and Unary operations for semantic type correctness */ |
| 370 | /* FIXME: Does not appear to be used */ |
| 371 | #define unop_type_check(v,o) binop_type_check((v),NULL,(o)) |
| 372 | |
| 373 | extern void |
| 374 | binop_type_check PARAMS ((struct value *, struct value *, int)); |
| 375 | |
| 376 | /* Error messages */ |
| 377 | |
| 378 | extern void |
| 379 | op_error PARAMS ((char *fmt, enum exp_opcode, int)); |
| 380 | |
| 381 | #define type_op_error(f,o) \ |
| 382 | op_error((f),(o),type_check==type_check_on ? 1 : 0) |
| 383 | #define range_op_error(f,o) \ |
| 384 | op_error((f),(o),range_check==range_check_on ? 1 : 0) |
| 385 | |
| 386 | extern void |
| 387 | type_error (); |
| 388 | |
| 389 | void |
| 390 | range_error (); |
| 391 | |
| 392 | /* Data: Does this value represent "truth" to the current language? */ |
| 393 | |
| 394 | extern int |
| 395 | value_true PARAMS ((struct value *)); |
| 396 | |
| 397 | /* Misc: The string representing a particular enum language. */ |
| 398 | |
| 399 | extern const struct language_defn * |
| 400 | language_def PARAMS ((enum language)); |
| 401 | |
| 402 | extern char * |
| 403 | language_str PARAMS ((enum language)); |
| 404 | |
| 405 | /* Add a language to the set known by GDB (at initialization time). */ |
| 406 | |
| 407 | extern void |
| 408 | add_language PARAMS ((const struct language_defn *)); |
| 409 | |
| 410 | extern enum language |
| 411 | get_frame_language PARAMS ((void)); /* In stack.c */ |
| 412 | |
| 413 | #endif /* defined (LANGUAGE_H) */ |