| 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 | struct expression; |
| 29 | /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */ |
| 30 | #endif |
| 31 | |
| 32 | /* This used to be included to configure GDB for one or more specific |
| 33 | languages. Now it is shortcutted to configure for all of them. FIXME. */ |
| 34 | /* #include "lang_def.h" */ |
| 35 | #define _LANG_c |
| 36 | #define _LANG_m2 |
| 37 | #define _LANG_chill |
| 38 | #define _LANG_fortran |
| 39 | |
| 40 | #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */ |
| 41 | |
| 42 | /* range_mode == |
| 43 | range_mode_auto: range_check set automatically to default of language. |
| 44 | range_mode_manual: range_check set manually by user. */ |
| 45 | |
| 46 | extern enum range_mode {range_mode_auto, range_mode_manual} range_mode; |
| 47 | |
| 48 | /* range_check == |
| 49 | range_check_on: Ranges are checked in GDB expressions, producing errors. |
| 50 | range_check_warn: Ranges are checked, producing warnings. |
| 51 | range_check_off: Ranges are not checked in GDB expressions. */ |
| 52 | |
| 53 | extern enum range_check |
| 54 | {range_check_off, range_check_warn, range_check_on} range_check; |
| 55 | |
| 56 | /* type_mode == |
| 57 | type_mode_auto: type_check set automatically to default of language |
| 58 | type_mode_manual: type_check set manually by user. */ |
| 59 | |
| 60 | extern enum type_mode {type_mode_auto, type_mode_manual} type_mode; |
| 61 | |
| 62 | /* type_check == |
| 63 | type_check_on: Types are checked in GDB expressions, producing errors. |
| 64 | type_check_warn: Types are checked, producing warnings. |
| 65 | type_check_off: Types are not checked in GDB expressions. */ |
| 66 | |
| 67 | extern enum type_check |
| 68 | {type_check_off, type_check_warn, type_check_on} type_check; |
| 69 | \f |
| 70 | /* Information for doing language dependent formatting of printed values. */ |
| 71 | |
| 72 | struct language_format_info |
| 73 | { |
| 74 | /* The format that can be passed directly to standard C printf functions |
| 75 | to generate a completely formatted value in the format appropriate for |
| 76 | the language. */ |
| 77 | |
| 78 | char *la_format; |
| 79 | |
| 80 | /* The prefix to be used when directly printing a value, or constructing |
| 81 | a standard C printf format. This generally is everything up to the |
| 82 | conversion specification (the part introduced by the '%' character |
| 83 | and terminated by the conversion specifier character). */ |
| 84 | |
| 85 | char *la_format_prefix; |
| 86 | |
| 87 | /* The conversion specifier. This is generally everything after the |
| 88 | field width and precision, typically only a single character such |
| 89 | as 'o' for octal format or 'x' for hexadecimal format. */ |
| 90 | |
| 91 | char *la_format_specifier; |
| 92 | |
| 93 | /* The suffix to be used when directly printing a value, or constructing |
| 94 | a standard C printf format. This generally is everything after the |
| 95 | conversion specification (the part introduced by the '%' character |
| 96 | and terminated by the conversion specifier character). */ |
| 97 | |
| 98 | char *la_format_suffix; /* Suffix for custom format string */ |
| 99 | }; |
| 100 | |
| 101 | /* Structure tying together assorted information about a language. */ |
| 102 | |
| 103 | struct language_defn |
| 104 | { |
| 105 | /* Name of the language */ |
| 106 | |
| 107 | char *la_name; |
| 108 | |
| 109 | /* its symtab language-enum (defs.h) */ |
| 110 | |
| 111 | enum language la_language; |
| 112 | |
| 113 | /* Its builtin types. This is a vector ended by a NULL pointer. These |
| 114 | types can be specified by name in parsing types in expressions, |
| 115 | regardless of whether the program being debugged actually defines |
| 116 | such a type. */ |
| 117 | |
| 118 | struct type ** const *la_builtin_type_vector; |
| 119 | |
| 120 | /* Default range checking */ |
| 121 | |
| 122 | enum range_check la_range_check; |
| 123 | |
| 124 | /* Default type checking */ |
| 125 | |
| 126 | enum type_check la_type_check; |
| 127 | |
| 128 | /* Parser function. */ |
| 129 | |
| 130 | int (*la_parser) PARAMS((void)); |
| 131 | |
| 132 | /* Parser error function */ |
| 133 | |
| 134 | void (*la_error) PARAMS ((char *)); |
| 135 | |
| 136 | /* Evaluate an expression. */ |
| 137 | struct value * (*evaluate_exp) PARAMS ((struct type*, struct expression *, |
| 138 | int *, enum noside)); |
| 139 | |
| 140 | void (*la_printchar) PARAMS ((int, GDB_FILE *)); |
| 141 | |
| 142 | void (*la_printstr) PARAMS ((GDB_FILE *, char *, unsigned int, int)); |
| 143 | |
| 144 | struct type *(*la_fund_type) PARAMS ((struct objfile *, int)); |
| 145 | |
| 146 | /* Print a type using syntax appropriate for this language. */ |
| 147 | |
| 148 | void (*la_print_type) PARAMS ((struct type *, char *, GDB_FILE *, int, int)); |
| 149 | |
| 150 | /* Print a value using syntax appropriate for this language. */ |
| 151 | |
| 152 | int (*la_val_print) PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *, |
| 153 | int, int, int, enum val_prettyprint)); |
| 154 | |
| 155 | /* Print a top-level value using syntax appropriate for this language. */ |
| 156 | |
| 157 | int (*la_value_print) PARAMS ((struct value *, GDB_FILE *, |
| 158 | int, enum val_prettyprint)); |
| 159 | |
| 160 | /* Base 2 (binary) formats. */ |
| 161 | |
| 162 | struct language_format_info la_binary_format; |
| 163 | |
| 164 | /* Base 8 (octal) formats. */ |
| 165 | |
| 166 | struct language_format_info la_octal_format; |
| 167 | |
| 168 | /* Base 10 (decimal) formats */ |
| 169 | |
| 170 | struct language_format_info la_decimal_format; |
| 171 | |
| 172 | /* Base 16 (hexadecimal) formats */ |
| 173 | |
| 174 | struct language_format_info la_hex_format; |
| 175 | |
| 176 | /* Table for printing expressions */ |
| 177 | |
| 178 | const struct op_print *la_op_print_tab; |
| 179 | |
| 180 | /* Zero if the language has first-class arrays. True if there are no |
| 181 | array values, and array objects decay to pointers, as in C. */ |
| 182 | |
| 183 | char c_style_arrays; |
| 184 | |
| 185 | /* Index to use for extracting the first element of a string. */ |
| 186 | char string_lower_bound; |
| 187 | |
| 188 | /* Type of elements of strings. */ |
| 189 | struct type **string_char_type; |
| 190 | |
| 191 | /* Add fields above this point, so the magic number is always last. */ |
| 192 | /* Magic number for compat checking */ |
| 193 | |
| 194 | long la_magic; |
| 195 | |
| 196 | }; |
| 197 | |
| 198 | #define LANG_MAGIC 910823L |
| 199 | |
| 200 | /* Pointer to the language_defn for our current language. This pointer |
| 201 | always points to *some* valid struct; it can be used without checking |
| 202 | it for validity. |
| 203 | |
| 204 | The current language affects expression parsing and evaluation |
| 205 | (FIXME: it might be cleaner to make the evaluation-related stuff |
| 206 | separate exp_opcodes for each different set of semantics. We |
| 207 | should at least think this through more clearly with respect to |
| 208 | what happens if the language is changed between parsing and |
| 209 | evaluation) and printing of things like types and arrays. It does |
| 210 | *not* affect symbol-reading-- each source file in a symbol-file has |
| 211 | its own language and we should keep track of that regardless of the |
| 212 | language when symbols are read. If we want some manual setting for |
| 213 | the language of symbol files (e.g. detecting when ".c" files are |
| 214 | C++), it should be a seprate setting from the current_language. */ |
| 215 | |
| 216 | extern const struct language_defn *current_language; |
| 217 | |
| 218 | /* Pointer to the language_defn expected by the user, e.g. the language |
| 219 | of main(), or the language we last mentioned in a message, or C. */ |
| 220 | |
| 221 | extern const struct language_defn *expected_language; |
| 222 | |
| 223 | /* language_mode == |
| 224 | language_mode_auto: current_language automatically set upon selection |
| 225 | of scope (e.g. stack frame) |
| 226 | language_mode_manual: current_language set only by user. */ |
| 227 | |
| 228 | extern enum language_mode |
| 229 | {language_mode_auto, language_mode_manual} language_mode; |
| 230 | \f |
| 231 | /* These macros define the behaviour of the expression |
| 232 | evaluator. */ |
| 233 | |
| 234 | /* Should we strictly type check expressions? */ |
| 235 | #define STRICT_TYPE (type_check != type_check_off) |
| 236 | |
| 237 | /* Should we range check values against the domain of their type? */ |
| 238 | #define RANGE_CHECK (range_check != range_check_off) |
| 239 | |
| 240 | /* "cast" really means conversion */ |
| 241 | /* FIXME -- should be a setting in language_defn */ |
| 242 | #define CAST_IS_CONVERSION (current_language->la_language == language_c || \ |
| 243 | current_language->la_language == language_cplus) |
| 244 | |
| 245 | extern void |
| 246 | language_info PARAMS ((int)); |
| 247 | |
| 248 | extern void |
| 249 | set_language PARAMS ((enum language)); |
| 250 | |
| 251 | \f |
| 252 | /* This page contains functions that return things that are |
| 253 | specific to languages. Each of these functions is based on |
| 254 | the current setting of working_lang, which the user sets |
| 255 | with the "set language" command. */ |
| 256 | |
| 257 | #define create_fundamental_type(objfile,typeid) \ |
| 258 | (current_language->la_fund_type(objfile, typeid)) |
| 259 | |
| 260 | #define LA_PRINT_TYPE(type,varstring,stream,show,level) \ |
| 261 | (current_language->la_print_type(type,varstring,stream,show,level)) |
| 262 | |
| 263 | #define LA_VAL_PRINT(type,valaddr,addr,stream,fmt,deref,recurse,pretty) \ |
| 264 | (current_language->la_val_print(type,valaddr,addr,stream,fmt,deref, \ |
| 265 | recurse,pretty)) |
| 266 | #define LA_VALUE_PRINT(val,stream,fmt,pretty) \ |
| 267 | (current_language->la_value_print(val,stream,fmt,pretty)) |
| 268 | |
| 269 | /* Return a format string for printf that will print a number in one of |
| 270 | the local (language-specific) formats. Result is static and is |
| 271 | overwritten by the next call. Takes printf options like "08" or "l" |
| 272 | (to produce e.g. %08x or %lx). */ |
| 273 | |
| 274 | #define local_binary_format() \ |
| 275 | (current_language->la_binary_format.la_format) |
| 276 | #define local_binary_format_prefix() \ |
| 277 | (current_language->la_binary_format.la_format_prefix) |
| 278 | #define local_binary_format_specifier() \ |
| 279 | (current_language->la_binary_format.la_format_specifier) |
| 280 | #define local_binary_format_suffix() \ |
| 281 | (current_language->la_binary_format.la_format_suffix) |
| 282 | |
| 283 | #define local_octal_format() \ |
| 284 | (current_language->la_octal_format.la_format) |
| 285 | #define local_octal_format_prefix() \ |
| 286 | (current_language->la_octal_format.la_format_prefix) |
| 287 | #define local_octal_format_specifier() \ |
| 288 | (current_language->la_octal_format.la_format_specifier) |
| 289 | #define local_octal_format_suffix() \ |
| 290 | (current_language->la_octal_format.la_format_suffix) |
| 291 | |
| 292 | #define local_decimal_format() \ |
| 293 | (current_language->la_decimal_format.la_format) |
| 294 | #define local_decimal_format_prefix() \ |
| 295 | (current_language->la_decimal_format.la_format_prefix) |
| 296 | #define local_decimal_format_specifier() \ |
| 297 | (current_language->la_decimal_format.la_format_specifier) |
| 298 | #define local_decimal_format_suffix() \ |
| 299 | (current_language->la_decimal_format.la_format_suffix) |
| 300 | |
| 301 | #define local_hex_format() \ |
| 302 | (current_language->la_hex_format.la_format) |
| 303 | #define local_hex_format_prefix() \ |
| 304 | (current_language->la_hex_format.la_format_prefix) |
| 305 | #define local_hex_format_specifier() \ |
| 306 | (current_language->la_hex_format.la_format_specifier) |
| 307 | #define local_hex_format_suffix() \ |
| 308 | (current_language->la_hex_format.la_format_suffix) |
| 309 | |
| 310 | #define LA_PRINT_CHAR(ch, stream) \ |
| 311 | (current_language->la_printchar(ch, stream)) |
| 312 | #define LA_PRINT_STRING(stream, string, length, force_ellipses) \ |
| 313 | (current_language->la_printstr(stream, string, length, force_ellipses)) |
| 314 | |
| 315 | /* Test a character to decide whether it can be printed in literal form |
| 316 | or needs to be printed in another representation. For example, |
| 317 | in C the literal form of the character with octal value 141 is 'a' |
| 318 | and the "other representation" is '\141'. The "other representation" |
| 319 | is program language dependent. */ |
| 320 | |
| 321 | #define PRINT_LITERAL_FORM(c) \ |
| 322 | ((c)>=0x20 && ((c)<0x7F || (c)>=0xA0) && (!sevenbit_strings || (c)<0x80)) |
| 323 | |
| 324 | /* Return a format string for printf that will print a number in one of |
| 325 | the local (language-specific) formats. Result is static and is |
| 326 | overwritten by the next call. Takes printf options like "08" or "l" |
| 327 | (to produce e.g. %08x or %lx). */ |
| 328 | |
| 329 | extern char * |
| 330 | local_decimal_format_custom PARAMS ((char *)); /* language.c */ |
| 331 | |
| 332 | extern char * |
| 333 | local_octal_format_custom PARAMS ((char *)); /* language.c */ |
| 334 | |
| 335 | extern char * |
| 336 | local_hex_format_custom PARAMS ((char *)); /* language.c */ |
| 337 | |
| 338 | /* Return a string that contains a number formatted in one of the local |
| 339 | (language-specific) formats. Result is static and is overwritten by |
| 340 | the next call. Takes printf options like "08" or "l". */ |
| 341 | |
| 342 | extern char * |
| 343 | local_hex_string PARAMS ((unsigned long)); /* language.c */ |
| 344 | |
| 345 | extern char * |
| 346 | local_hex_string_custom PARAMS ((unsigned long, char *)); /* language.c */ |
| 347 | |
| 348 | /* Type predicates */ |
| 349 | |
| 350 | extern int |
| 351 | simple_type PARAMS ((struct type *)); |
| 352 | |
| 353 | extern int |
| 354 | ordered_type PARAMS ((struct type *)); |
| 355 | |
| 356 | extern int |
| 357 | same_type PARAMS ((struct type *, struct type *)); |
| 358 | |
| 359 | extern int |
| 360 | integral_type PARAMS ((struct type *)); |
| 361 | |
| 362 | extern int |
| 363 | numeric_type PARAMS ((struct type *)); |
| 364 | |
| 365 | extern int |
| 366 | character_type PARAMS ((struct type *)); |
| 367 | |
| 368 | extern int |
| 369 | boolean_type PARAMS ((struct type *)); |
| 370 | |
| 371 | extern int |
| 372 | float_type PARAMS ((struct type *)); |
| 373 | |
| 374 | extern int |
| 375 | pointer_type PARAMS ((struct type *)); |
| 376 | |
| 377 | extern int |
| 378 | structured_type PARAMS ((struct type *)); |
| 379 | |
| 380 | /* Checks Binary and Unary operations for semantic type correctness */ |
| 381 | /* FIXME: Does not appear to be used */ |
| 382 | #define unop_type_check(v,o) binop_type_check((v),NULL,(o)) |
| 383 | |
| 384 | extern void |
| 385 | binop_type_check PARAMS ((struct value *, struct value *, int)); |
| 386 | |
| 387 | /* Error messages */ |
| 388 | |
| 389 | extern void |
| 390 | op_error PARAMS ((char *fmt, enum exp_opcode, int)); |
| 391 | |
| 392 | #define type_op_error(f,o) \ |
| 393 | op_error((f),(o),type_check==type_check_on ? 1 : 0) |
| 394 | #define range_op_error(f,o) \ |
| 395 | op_error((f),(o),range_check==range_check_on ? 1 : 0) |
| 396 | |
| 397 | extern void |
| 398 | type_error PARAMS ((char *, ...)) |
| 399 | ATTR_FORMAT(printf, 1, 2); |
| 400 | |
| 401 | void |
| 402 | range_error PARAMS ((char *, ...)) |
| 403 | ATTR_FORMAT(printf, 1, 2); |
| 404 | |
| 405 | /* Data: Does this value represent "truth" to the current language? */ |
| 406 | |
| 407 | extern int |
| 408 | value_true PARAMS ((struct value *)); |
| 409 | |
| 410 | /* Misc: The string representing a particular enum language. */ |
| 411 | |
| 412 | extern const struct language_defn * |
| 413 | language_def PARAMS ((enum language)); |
| 414 | |
| 415 | extern char * |
| 416 | language_str PARAMS ((enum language)); |
| 417 | |
| 418 | /* Add a language to the set known by GDB (at initialization time). */ |
| 419 | |
| 420 | extern void |
| 421 | add_language PARAMS ((const struct language_defn *)); |
| 422 | |
| 423 | extern enum language |
| 424 | get_frame_language PARAMS ((void)); /* In stack.c */ |
| 425 | |
| 426 | #endif /* defined (LANGUAGE_H) */ |