| 1 | /* Multiple source language support 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 | /* This file contains functions that return things that are specific |
| 23 | to languages. Each function should examine current_language if necessary, |
| 24 | and return the appropriate result. */ |
| 25 | |
| 26 | /* FIXME: Most of these would be better organized as macros which |
| 27 | return data out of a "language-specific" struct pointer that is set |
| 28 | whenever the working language changes. That would be a lot faster. */ |
| 29 | |
| 30 | #include "defs.h" |
| 31 | #include <string.h> |
| 32 | #include <varargs.h> |
| 33 | |
| 34 | #include "symtab.h" |
| 35 | #include "gdbtypes.h" |
| 36 | #include "value.h" |
| 37 | #include "gdbcmd.h" |
| 38 | #include "frame.h" |
| 39 | #include "expression.h" |
| 40 | #include "language.h" |
| 41 | #include "target.h" |
| 42 | #include "parser-defs.h" |
| 43 | |
| 44 | static void |
| 45 | show_language_command PARAMS ((char *, int)); |
| 46 | |
| 47 | static void |
| 48 | set_language_command PARAMS ((char *, int)); |
| 49 | |
| 50 | static void |
| 51 | show_type_command PARAMS ((char *, int)); |
| 52 | |
| 53 | static void |
| 54 | set_type_command PARAMS ((char *, int)); |
| 55 | |
| 56 | static void |
| 57 | show_range_command PARAMS ((char *, int)); |
| 58 | |
| 59 | static void |
| 60 | set_range_command PARAMS ((char *, int)); |
| 61 | |
| 62 | static void |
| 63 | set_range_str PARAMS ((void)); |
| 64 | |
| 65 | static void |
| 66 | set_type_str PARAMS ((void)); |
| 67 | |
| 68 | static void |
| 69 | set_lang_str PARAMS ((void)); |
| 70 | |
| 71 | static void |
| 72 | unk_lang_error PARAMS ((char *)); |
| 73 | |
| 74 | static int |
| 75 | unk_lang_parser PARAMS ((void)); |
| 76 | |
| 77 | static void |
| 78 | show_check PARAMS ((char *, int)); |
| 79 | |
| 80 | static void |
| 81 | set_check PARAMS ((char *, int)); |
| 82 | |
| 83 | static void |
| 84 | set_type_range PARAMS ((void)); |
| 85 | |
| 86 | /* Forward declaration */ |
| 87 | extern const struct language_defn unknown_language_defn; |
| 88 | extern char *warning_pre_print; |
| 89 | |
| 90 | /* The current (default at startup) state of type and range checking. |
| 91 | (If the modes are set to "auto", though, these are changed based |
| 92 | on the default language at startup, and then again based on the |
| 93 | language of the first source file. */ |
| 94 | |
| 95 | enum range_mode range_mode = range_mode_auto; |
| 96 | enum range_check range_check = range_check_off; |
| 97 | enum type_mode type_mode = type_mode_auto; |
| 98 | enum type_check type_check = type_check_off; |
| 99 | |
| 100 | /* The current language and language_mode (see language.h) */ |
| 101 | |
| 102 | const struct language_defn *current_language = &unknown_language_defn; |
| 103 | enum language_mode language_mode = language_mode_auto; |
| 104 | |
| 105 | /* The language that the user expects to be typing in (the language |
| 106 | of main(), or the last language we notified them about, or C). */ |
| 107 | |
| 108 | const struct language_defn *expected_language; |
| 109 | |
| 110 | /* The list of supported languages. The list itself is malloc'd. */ |
| 111 | |
| 112 | static const struct language_defn **languages; |
| 113 | static unsigned languages_size; |
| 114 | static unsigned languages_allocsize; |
| 115 | #define DEFAULT_ALLOCSIZE 3 |
| 116 | |
| 117 | /* The "set language/type/range" commands all put stuff in these |
| 118 | buffers. This is to make them work as set/show commands. The |
| 119 | user's string is copied here, then the set_* commands look at |
| 120 | them and update them to something that looks nice when it is |
| 121 | printed out. */ |
| 122 | |
| 123 | static char *language; |
| 124 | static char *type; |
| 125 | static char *range; |
| 126 | |
| 127 | /* Warning issued when current_language and the language of the current |
| 128 | frame do not match. */ |
| 129 | char lang_frame_mismatch_warn[] = |
| 130 | "Warning: the current language does not match this frame."; |
| 131 | |
| 132 | \f |
| 133 | /* This page contains the functions corresponding to GDB commands |
| 134 | and their helpers. */ |
| 135 | |
| 136 | /* Show command. Display a warning if the language set |
| 137 | does not match the frame. */ |
| 138 | static void |
| 139 | show_language_command (ignore, from_tty) |
| 140 | char *ignore; |
| 141 | int from_tty; |
| 142 | { |
| 143 | enum language flang; /* The language of the current frame */ |
| 144 | |
| 145 | flang = get_frame_language(); |
| 146 | if (flang != language_unknown && |
| 147 | language_mode == language_mode_manual && |
| 148 | current_language->la_language != flang) |
| 149 | printf_filtered("%s\n",lang_frame_mismatch_warn); |
| 150 | } |
| 151 | |
| 152 | /* Set command. Change the current working language. */ |
| 153 | static void |
| 154 | set_language_command (ignore, from_tty) |
| 155 | char *ignore; |
| 156 | int from_tty; |
| 157 | { |
| 158 | int i; |
| 159 | enum language flang; |
| 160 | char *err_lang; |
| 161 | |
| 162 | /* FIXME -- do this from the list, with HELP. */ |
| 163 | if (!language || !language[0]) { |
| 164 | printf("The currently understood settings are:\n\n\ |
| 165 | local or auto Automatic setting based on source file\n\ |
| 166 | c Use the C language\n\ |
| 167 | c++ Use the C++ language\n\ |
| 168 | modula-2 Use the Modula-2 language\n"); |
| 169 | /* Restore the silly string. */ |
| 170 | set_language(current_language->la_language); |
| 171 | return; |
| 172 | } |
| 173 | |
| 174 | /* Search the list of languages for a match. */ |
| 175 | for (i = 0; i < languages_size; i++) { |
| 176 | if (!strcmp (languages[i]->la_name, language)) { |
| 177 | /* Found it! Go into manual mode, and use this language. */ |
| 178 | if (languages[i]->la_language == language_auto) { |
| 179 | /* Enter auto mode. Set to the current frame's language, if known. */ |
| 180 | language_mode = language_mode_auto; |
| 181 | flang = get_frame_language(); |
| 182 | if (flang!=language_unknown) |
| 183 | set_language(flang); |
| 184 | expected_language = current_language; |
| 185 | return; |
| 186 | } else { |
| 187 | /* Enter manual mode. Set the specified language. */ |
| 188 | language_mode = language_mode_manual; |
| 189 | current_language = languages[i]; |
| 190 | set_type_range (); |
| 191 | set_lang_str(); |
| 192 | expected_language = current_language; |
| 193 | return; |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /* Reset the language (esp. the global string "language") to the |
| 199 | correct values. */ |
| 200 | err_lang=savestring(language,strlen(language)); |
| 201 | make_cleanup (free, err_lang); /* Free it after error */ |
| 202 | set_language(current_language->la_language); |
| 203 | error ("Unknown language `%s'.",err_lang); |
| 204 | } |
| 205 | |
| 206 | /* Show command. Display a warning if the type setting does |
| 207 | not match the current language. */ |
| 208 | static void |
| 209 | show_type_command(ignore, from_tty) |
| 210 | char *ignore; |
| 211 | int from_tty; |
| 212 | { |
| 213 | if (type_check != current_language->la_type_check) |
| 214 | printf( |
| 215 | "Warning: the current type check setting does not match the language.\n"); |
| 216 | } |
| 217 | |
| 218 | /* Set command. Change the setting for type checking. */ |
| 219 | static void |
| 220 | set_type_command(ignore, from_tty) |
| 221 | char *ignore; |
| 222 | int from_tty; |
| 223 | { |
| 224 | if (!strcmp(type,"on")) |
| 225 | { |
| 226 | type_check = type_check_on; |
| 227 | type_mode = type_mode_manual; |
| 228 | } |
| 229 | else if (!strcmp(type,"warn")) |
| 230 | { |
| 231 | type_check = type_check_warn; |
| 232 | type_mode = type_mode_manual; |
| 233 | } |
| 234 | else if (!strcmp(type,"off")) |
| 235 | { |
| 236 | type_check = type_check_off; |
| 237 | type_mode = type_mode_manual; |
| 238 | } |
| 239 | else if (!strcmp(type,"auto")) |
| 240 | { |
| 241 | type_mode = type_mode_auto; |
| 242 | set_type_range(); |
| 243 | /* Avoid hitting the set_type_str call below. We |
| 244 | did it in set_type_range. */ |
| 245 | return; |
| 246 | } |
| 247 | set_type_str(); |
| 248 | show_type_command((char *)NULL, from_tty); |
| 249 | } |
| 250 | |
| 251 | /* Show command. Display a warning if the range setting does |
| 252 | not match the current language. */ |
| 253 | static void |
| 254 | show_range_command(ignore, from_tty) |
| 255 | char *ignore; |
| 256 | int from_tty; |
| 257 | { |
| 258 | |
| 259 | if (range_check != current_language->la_range_check) |
| 260 | printf( |
| 261 | "Warning: the current range check setting does not match the language.\n"); |
| 262 | } |
| 263 | |
| 264 | /* Set command. Change the setting for range checking. */ |
| 265 | static void |
| 266 | set_range_command(ignore, from_tty) |
| 267 | char *ignore; |
| 268 | int from_tty; |
| 269 | { |
| 270 | if (!strcmp(range,"on")) |
| 271 | { |
| 272 | range_check = range_check_on; |
| 273 | range_mode = range_mode_manual; |
| 274 | } |
| 275 | else if (!strcmp(range,"warn")) |
| 276 | { |
| 277 | range_check = range_check_warn; |
| 278 | range_mode = range_mode_manual; |
| 279 | } |
| 280 | else if (!strcmp(range,"off")) |
| 281 | { |
| 282 | range_check = range_check_off; |
| 283 | range_mode = range_mode_manual; |
| 284 | } |
| 285 | else if (!strcmp(range,"auto")) |
| 286 | { |
| 287 | range_mode = range_mode_auto; |
| 288 | set_type_range(); |
| 289 | /* Avoid hitting the set_range_str call below. We |
| 290 | did it in set_type_range. */ |
| 291 | return; |
| 292 | } |
| 293 | set_range_str(); |
| 294 | show_range_command((char *)0, from_tty); |
| 295 | } |
| 296 | |
| 297 | /* Set the status of range and type checking based on |
| 298 | the current modes and the current language. |
| 299 | If SHOW is non-zero, then print out the current language, |
| 300 | type and range checking status. */ |
| 301 | static void |
| 302 | set_type_range() |
| 303 | { |
| 304 | |
| 305 | if (range_mode == range_mode_auto) |
| 306 | range_check = current_language->la_range_check; |
| 307 | |
| 308 | if (type_mode == type_mode_auto) |
| 309 | type_check = current_language->la_type_check; |
| 310 | |
| 311 | set_type_str(); |
| 312 | set_range_str(); |
| 313 | } |
| 314 | |
| 315 | /* Set current language to (enum language) LANG. */ |
| 316 | |
| 317 | void |
| 318 | set_language(lang) |
| 319 | enum language lang; |
| 320 | { |
| 321 | int i; |
| 322 | |
| 323 | for (i = 0; i < languages_size; i++) { |
| 324 | if (languages[i]->la_language == lang) { |
| 325 | current_language = languages[i]; |
| 326 | set_type_range (); |
| 327 | set_lang_str(); |
| 328 | break; |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | \f |
| 333 | /* This page contains functions that update the global vars |
| 334 | language, type and range. */ |
| 335 | static void |
| 336 | set_lang_str() |
| 337 | { |
| 338 | char *prefix = ""; |
| 339 | |
| 340 | free (language); |
| 341 | if (language_mode == language_mode_auto) |
| 342 | prefix = "auto; currently "; |
| 343 | |
| 344 | language = concat(prefix, current_language->la_name, NULL); |
| 345 | } |
| 346 | |
| 347 | static void |
| 348 | set_type_str() |
| 349 | { |
| 350 | char *tmp, *prefix = ""; |
| 351 | |
| 352 | free (type); |
| 353 | if (type_mode==type_mode_auto) |
| 354 | prefix = "auto; currently "; |
| 355 | |
| 356 | switch(type_check) |
| 357 | { |
| 358 | case type_check_on: |
| 359 | tmp = "on"; |
| 360 | break; |
| 361 | case type_check_off: |
| 362 | tmp = "off"; |
| 363 | break; |
| 364 | case type_check_warn: |
| 365 | tmp = "warn"; |
| 366 | break; |
| 367 | default: |
| 368 | error ("Unrecognized type check setting."); |
| 369 | } |
| 370 | |
| 371 | type = concat(prefix,tmp,NULL); |
| 372 | } |
| 373 | |
| 374 | static void |
| 375 | set_range_str() |
| 376 | { |
| 377 | char *tmp, *pref = ""; |
| 378 | |
| 379 | free (range); |
| 380 | if (range_mode==range_mode_auto) |
| 381 | pref = "auto; currently "; |
| 382 | |
| 383 | switch(range_check) |
| 384 | { |
| 385 | case range_check_on: |
| 386 | tmp = "on"; |
| 387 | break; |
| 388 | case range_check_off: |
| 389 | tmp = "off"; |
| 390 | break; |
| 391 | case range_check_warn: |
| 392 | tmp = "warn"; |
| 393 | break; |
| 394 | default: |
| 395 | error ("Unrecognized range check setting."); |
| 396 | } |
| 397 | |
| 398 | range = concat(pref,tmp,NULL); |
| 399 | } |
| 400 | |
| 401 | |
| 402 | /* Print out the current language settings: language, range and |
| 403 | type checking. If QUIETLY, print only what has changed. */ |
| 404 | |
| 405 | void |
| 406 | language_info (quietly) |
| 407 | int quietly; |
| 408 | { |
| 409 | if (quietly && expected_language == current_language) |
| 410 | return; |
| 411 | |
| 412 | expected_language = current_language; |
| 413 | printf("Current language: %s\n",language); |
| 414 | show_language_command((char *)0, 1); |
| 415 | |
| 416 | if (!quietly) |
| 417 | { |
| 418 | printf("Type checking: %s\n",type); |
| 419 | show_type_command((char *)0, 1); |
| 420 | printf("Range checking: %s\n",range); |
| 421 | show_range_command((char *)0, 1); |
| 422 | } |
| 423 | } |
| 424 | \f |
| 425 | /* Return the result of a binary operation. */ |
| 426 | |
| 427 | #if 0 /* Currently unused */ |
| 428 | |
| 429 | struct type * |
| 430 | binop_result_type(v1,v2) |
| 431 | value v1,v2; |
| 432 | { |
| 433 | int l1,l2,size,uns; |
| 434 | |
| 435 | l1 = TYPE_LENGTH(VALUE_TYPE(v1)); |
| 436 | l2 = TYPE_LENGTH(VALUE_TYPE(v2)); |
| 437 | |
| 438 | switch(current_language->la_language) |
| 439 | { |
| 440 | case language_c: |
| 441 | case language_cplus: |
| 442 | if (TYPE_CODE(VALUE_TYPE(v1))==TYPE_CODE_FLT) |
| 443 | return TYPE_CODE(VALUE_TYPE(v2)) == TYPE_CODE_FLT && l2 > l1 ? |
| 444 | VALUE_TYPE(v2) : VALUE_TYPE(v1); |
| 445 | else if (TYPE_CODE(VALUE_TYPE(v2))==TYPE_CODE_FLT) |
| 446 | return TYPE_CODE(VALUE_TYPE(v1)) == TYPE_CODE_FLT && l1 > l2 ? |
| 447 | VALUE_TYPE(v1) : VALUE_TYPE(v2); |
| 448 | else if (TYPE_UNSIGNED(VALUE_TYPE(v1)) && l1 > l2) |
| 449 | return VALUE_TYPE(v1); |
| 450 | else if (TYPE_UNSIGNED(VALUE_TYPE(v2)) && l2 > l1) |
| 451 | return VALUE_TYPE(v2); |
| 452 | else /* Both are signed. Result is the longer type */ |
| 453 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); |
| 454 | break; |
| 455 | case language_m2: |
| 456 | /* If we are doing type-checking, l1 should equal l2, so this is |
| 457 | not needed. */ |
| 458 | return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2); |
| 459 | break; |
| 460 | } |
| 461 | abort(); |
| 462 | return (struct type *)0; /* For lint */ |
| 463 | } |
| 464 | |
| 465 | #endif /* 0 */ |
| 466 | |
| 467 | \f |
| 468 | /* This page contains functions that return format strings for |
| 469 | printf for printing out numbers in different formats */ |
| 470 | |
| 471 | /* Returns the appropriate printf format for hexadecimal |
| 472 | numbers. */ |
| 473 | char * |
| 474 | local_hex_format_custom(pre) |
| 475 | char *pre; |
| 476 | { |
| 477 | static char form[50]; |
| 478 | |
| 479 | strcpy (form, current_language->la_hex_format_pre); |
| 480 | strcat (form, pre); |
| 481 | strcat (form, current_language->la_hex_format_suf); |
| 482 | return form; |
| 483 | } |
| 484 | |
| 485 | /* Converts a number to hexadecimal and stores it in a static |
| 486 | string. Returns a pointer to this string. */ |
| 487 | char * |
| 488 | local_hex_string (num) |
| 489 | int num; |
| 490 | { |
| 491 | static char res[50]; |
| 492 | |
| 493 | sprintf (res, current_language->la_hex_format, num); |
| 494 | return res; |
| 495 | } |
| 496 | |
| 497 | /* Converts a number to custom hexadecimal and stores it in a static |
| 498 | string. Returns a pointer to this string. */ |
| 499 | char * |
| 500 | local_hex_string_custom(num,pre) |
| 501 | int num; |
| 502 | char *pre; |
| 503 | { |
| 504 | static char res[50]; |
| 505 | |
| 506 | sprintf (res, local_hex_format_custom(pre), num); |
| 507 | return res; |
| 508 | } |
| 509 | |
| 510 | /* Returns the appropriate printf format for octal |
| 511 | numbers. */ |
| 512 | char * |
| 513 | local_octal_format_custom(pre) |
| 514 | char *pre; |
| 515 | { |
| 516 | static char form[50]; |
| 517 | |
| 518 | strcpy (form, current_language->la_octal_format_pre); |
| 519 | strcat (form, pre); |
| 520 | strcat (form, current_language->la_octal_format_suf); |
| 521 | return form; |
| 522 | } |
| 523 | \f |
| 524 | /* This page contains functions that are used in type/range checking. |
| 525 | They all return zero if the type/range check fails. |
| 526 | |
| 527 | It is hoped that these will make extending GDB to parse different |
| 528 | languages a little easier. These are primarily used in eval.c when |
| 529 | evaluating expressions and making sure that their types are correct. |
| 530 | Instead of having a mess of conjucted/disjuncted expressions in an "if", |
| 531 | the ideas of type can be wrapped up in the following functions. |
| 532 | |
| 533 | Note that some of them are not currently dependent upon which language |
| 534 | is currently being parsed. For example, floats are the same in |
| 535 | C and Modula-2 (ie. the only floating point type has TYPE_CODE of |
| 536 | TYPE_CODE_FLT), while booleans are different. */ |
| 537 | |
| 538 | /* Returns non-zero if its argument is a simple type. This is the same for |
| 539 | both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur, |
| 540 | and thus will never cause the failure of the test. */ |
| 541 | int |
| 542 | simple_type(type) |
| 543 | struct type *type; |
| 544 | { |
| 545 | switch (TYPE_CODE (type)) { |
| 546 | case TYPE_CODE_INT: |
| 547 | case TYPE_CODE_CHAR: |
| 548 | case TYPE_CODE_ENUM: |
| 549 | case TYPE_CODE_FLT: |
| 550 | case TYPE_CODE_RANGE: |
| 551 | case TYPE_CODE_BOOL: |
| 552 | return 1; |
| 553 | |
| 554 | default: |
| 555 | return 0; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | /* Returns non-zero if its argument is of an ordered type. */ |
| 560 | int |
| 561 | ordered_type (type) |
| 562 | struct type *type; |
| 563 | { |
| 564 | switch (TYPE_CODE (type)) { |
| 565 | case TYPE_CODE_INT: |
| 566 | case TYPE_CODE_CHAR: |
| 567 | case TYPE_CODE_ENUM: |
| 568 | case TYPE_CODE_FLT: |
| 569 | case TYPE_CODE_RANGE: |
| 570 | return 1; |
| 571 | |
| 572 | default: |
| 573 | return 0; |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | /* Returns non-zero if the two types are the same */ |
| 578 | int |
| 579 | same_type (arg1, arg2) |
| 580 | struct type *arg1, *arg2; |
| 581 | { |
| 582 | if (structured_type(arg1) ? !structured_type(arg2) : structured_type(arg2)) |
| 583 | /* One is structured and one isn't */ |
| 584 | return 0; |
| 585 | else if (structured_type(arg1) && structured_type(arg2)) |
| 586 | return arg1 == arg2; |
| 587 | else if (numeric_type(arg1) && numeric_type(arg2)) |
| 588 | return (TYPE_CODE(arg2) == TYPE_CODE(arg1)) && |
| 589 | (TYPE_UNSIGNED(arg1) == TYPE_UNSIGNED(arg2)) |
| 590 | ? 1 : 0; |
| 591 | else |
| 592 | return arg1==arg2; |
| 593 | } |
| 594 | |
| 595 | /* Returns non-zero if the type is integral */ |
| 596 | int |
| 597 | integral_type (type) |
| 598 | struct type *type; |
| 599 | { |
| 600 | switch(current_language->la_language) |
| 601 | { |
| 602 | case language_c: |
| 603 | case language_cplus: |
| 604 | return (TYPE_CODE(type) != TYPE_CODE_INT) && |
| 605 | (TYPE_CODE(type) != TYPE_CODE_ENUM) ? 0 : 1; |
| 606 | case language_m2: |
| 607 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; |
| 608 | default: |
| 609 | error ("Language not supported."); |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | /* Returns non-zero if the value is numeric */ |
| 614 | int |
| 615 | numeric_type (type) |
| 616 | struct type *type; |
| 617 | { |
| 618 | switch (TYPE_CODE (type)) { |
| 619 | case TYPE_CODE_INT: |
| 620 | case TYPE_CODE_FLT: |
| 621 | return 1; |
| 622 | |
| 623 | default: |
| 624 | return 0; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /* Returns non-zero if the value is a character type */ |
| 629 | int |
| 630 | character_type (type) |
| 631 | struct type *type; |
| 632 | { |
| 633 | switch(current_language->la_language) |
| 634 | { |
| 635 | case language_m2: |
| 636 | return TYPE_CODE(type) != TYPE_CODE_CHAR ? 0 : 1; |
| 637 | |
| 638 | case language_c: |
| 639 | case language_cplus: |
| 640 | return (TYPE_CODE(type) == TYPE_CODE_INT) && |
| 641 | TYPE_LENGTH(type) == sizeof(char) |
| 642 | ? 1 : 0; |
| 643 | default: |
| 644 | return (0); |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | /* Returns non-zero if the value is a boolean type */ |
| 649 | int |
| 650 | boolean_type (type) |
| 651 | struct type *type; |
| 652 | { |
| 653 | switch(current_language->la_language) |
| 654 | { |
| 655 | case language_m2: |
| 656 | return TYPE_CODE(type) != TYPE_CODE_BOOL ? 0 : 1; |
| 657 | |
| 658 | case language_c: |
| 659 | case language_cplus: |
| 660 | return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1; |
| 661 | default: |
| 662 | return (0); |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | /* Returns non-zero if the value is a floating-point type */ |
| 667 | int |
| 668 | float_type (type) |
| 669 | struct type *type; |
| 670 | { |
| 671 | return TYPE_CODE(type) == TYPE_CODE_FLT; |
| 672 | } |
| 673 | |
| 674 | /* Returns non-zero if the value is a pointer type */ |
| 675 | int |
| 676 | pointer_type(type) |
| 677 | struct type *type; |
| 678 | { |
| 679 | return TYPE_CODE(type) == TYPE_CODE_PTR || |
| 680 | TYPE_CODE(type) == TYPE_CODE_REF; |
| 681 | } |
| 682 | |
| 683 | /* Returns non-zero if the value is a structured type */ |
| 684 | int |
| 685 | structured_type(type) |
| 686 | struct type *type; |
| 687 | { |
| 688 | switch(current_language->la_language) |
| 689 | { |
| 690 | case language_c: |
| 691 | case language_cplus: |
| 692 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || |
| 693 | (TYPE_CODE(type) == TYPE_CODE_UNION) || |
| 694 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); |
| 695 | case language_m2: |
| 696 | return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || |
| 697 | (TYPE_CODE(type) == TYPE_CODE_SET) || |
| 698 | (TYPE_CODE(type) == TYPE_CODE_ARRAY); |
| 699 | default: |
| 700 | return (0); |
| 701 | } |
| 702 | } |
| 703 | \f |
| 704 | /* This page contains functions that return info about |
| 705 | (struct value) values used in GDB. */ |
| 706 | |
| 707 | /* Returns non-zero if the value VAL represents a true value. */ |
| 708 | int |
| 709 | value_true(val) |
| 710 | value val; |
| 711 | { |
| 712 | int len, i; |
| 713 | struct type *type; |
| 714 | LONGEST v; |
| 715 | |
| 716 | switch (current_language->la_language) { |
| 717 | |
| 718 | case language_c: |
| 719 | case language_cplus: |
| 720 | return !value_zerop (val); |
| 721 | |
| 722 | case language_m2: |
| 723 | type = VALUE_TYPE(val); |
| 724 | if (TYPE_CODE (type) != TYPE_CODE_BOOL) |
| 725 | return 0; /* Not a BOOLEAN at all */ |
| 726 | /* Search the fields for one that matches the current value. */ |
| 727 | len = TYPE_NFIELDS (type); |
| 728 | v = value_as_long (val); |
| 729 | for (i = 0; i < len; i++) |
| 730 | { |
| 731 | QUIT; |
| 732 | if (v == TYPE_FIELD_BITPOS (type, i)) |
| 733 | break; |
| 734 | } |
| 735 | if (i >= len) |
| 736 | return 0; /* Not a valid BOOLEAN value */ |
| 737 | if (!strcmp ("TRUE", TYPE_FIELD_NAME(VALUE_TYPE(val), i))) |
| 738 | return 1; /* BOOLEAN with value TRUE */ |
| 739 | else |
| 740 | return 0; /* BOOLEAN with value FALSE */ |
| 741 | break; |
| 742 | |
| 743 | default: |
| 744 | error ("Language not supported."); |
| 745 | } |
| 746 | } |
| 747 | \f |
| 748 | /* Returns non-zero if the operator OP is defined on |
| 749 | the values ARG1 and ARG2. */ |
| 750 | |
| 751 | #if 0 /* Currently unused */ |
| 752 | |
| 753 | void |
| 754 | binop_type_check(arg1,arg2,op) |
| 755 | value arg1,arg2; |
| 756 | int op; |
| 757 | { |
| 758 | struct type *t1, *t2; |
| 759 | |
| 760 | /* If we're not checking types, always return success. */ |
| 761 | if (!STRICT_TYPE) |
| 762 | return; |
| 763 | |
| 764 | t1=VALUE_TYPE(arg1); |
| 765 | if (arg2!=(value)NULL) |
| 766 | t2=VALUE_TYPE(arg2); |
| 767 | else |
| 768 | t2=NULL; |
| 769 | |
| 770 | switch(op) |
| 771 | { |
| 772 | case BINOP_ADD: |
| 773 | case BINOP_SUB: |
| 774 | if ((numeric_type(t1) && pointer_type(t2)) || |
| 775 | (pointer_type(t1) && numeric_type(t2))) |
| 776 | { |
| 777 | warning ("combining pointer and integer.\n"); |
| 778 | break; |
| 779 | } |
| 780 | case BINOP_MUL: |
| 781 | case BINOP_LSH: |
| 782 | case BINOP_RSH: |
| 783 | if (!numeric_type(t1) || !numeric_type(t2)) |
| 784 | type_op_error ("Arguments to %s must be numbers.",op); |
| 785 | else if (!same_type(t1,t2)) |
| 786 | type_op_error ("Arguments to %s must be of the same type.",op); |
| 787 | break; |
| 788 | |
| 789 | case BINOP_AND: |
| 790 | case BINOP_OR: |
| 791 | if (!boolean_type(t1) || !boolean_type(t2)) |
| 792 | type_op_error ("Arguments to %s must be of boolean type.",op); |
| 793 | break; |
| 794 | |
| 795 | case BINOP_EQUAL: |
| 796 | if ((pointer_type(t1) && !(pointer_type(t2) || integral_type(t2))) || |
| 797 | (pointer_type(t2) && !(pointer_type(t1) || integral_type(t1)))) |
| 798 | type_op_error ("A pointer can only be compared to an integer or pointer.",op); |
| 799 | else if ((pointer_type(t1) && integral_type(t2)) || |
| 800 | (integral_type(t1) && pointer_type(t2))) |
| 801 | { |
| 802 | warning ("combining integer and pointer.\n"); |
| 803 | break; |
| 804 | } |
| 805 | else if (!simple_type(t1) || !simple_type(t2)) |
| 806 | type_op_error ("Arguments to %s must be of simple type.",op); |
| 807 | else if (!same_type(t1,t2)) |
| 808 | type_op_error ("Arguments to %s must be of the same type.",op); |
| 809 | break; |
| 810 | |
| 811 | case BINOP_REM: |
| 812 | if (!integral_type(t1) || !integral_type(t2)) |
| 813 | type_op_error ("Arguments to %s must be of integral type.",op); |
| 814 | break; |
| 815 | |
| 816 | case BINOP_LESS: |
| 817 | case BINOP_GTR: |
| 818 | case BINOP_LEQ: |
| 819 | case BINOP_GEQ: |
| 820 | if (!ordered_type(t1) || !ordered_type(t2)) |
| 821 | type_op_error ("Arguments to %s must be of ordered type.",op); |
| 822 | else if (!same_type(t1,t2)) |
| 823 | type_op_error ("Arguments to %s must be of the same type.",op); |
| 824 | break; |
| 825 | |
| 826 | case BINOP_ASSIGN: |
| 827 | if (pointer_type(t1) && !integral_type(t2)) |
| 828 | type_op_error ("A pointer can only be assigned an integer.",op); |
| 829 | else if (pointer_type(t1) && integral_type(t2)) |
| 830 | { |
| 831 | warning ("combining integer and pointer."); |
| 832 | break; |
| 833 | } |
| 834 | else if (!simple_type(t1) || !simple_type(t2)) |
| 835 | type_op_error ("Arguments to %s must be of simple type.",op); |
| 836 | else if (!same_type(t1,t2)) |
| 837 | type_op_error ("Arguments to %s must be of the same type.",op); |
| 838 | break; |
| 839 | |
| 840 | /* Unary checks -- arg2 is null */ |
| 841 | |
| 842 | case UNOP_ZEROP: |
| 843 | if (!boolean_type(t1)) |
| 844 | type_op_error ("Argument to %s must be of boolean type.",op); |
| 845 | break; |
| 846 | |
| 847 | case UNOP_PLUS: |
| 848 | case UNOP_NEG: |
| 849 | if (!numeric_type(t1)) |
| 850 | type_op_error ("Argument to %s must be of numeric type.",op); |
| 851 | break; |
| 852 | |
| 853 | case UNOP_IND: |
| 854 | if (integral_type(t1)) |
| 855 | { |
| 856 | warning ("combining pointer and integer.\n"); |
| 857 | break; |
| 858 | } |
| 859 | else if (!pointer_type(t1)) |
| 860 | type_op_error ("Argument to %s must be a pointer.",op); |
| 861 | break; |
| 862 | |
| 863 | case UNOP_PREINCREMENT: |
| 864 | case UNOP_POSTINCREMENT: |
| 865 | case UNOP_PREDECREMENT: |
| 866 | case UNOP_POSTDECREMENT: |
| 867 | if (!ordered_type(t1)) |
| 868 | type_op_error ("Argument to %s must be of an ordered type.",op); |
| 869 | break; |
| 870 | |
| 871 | default: |
| 872 | /* Ok. The following operators have different meanings in |
| 873 | different languages. */ |
| 874 | switch(current_language->la_language) |
| 875 | { |
| 876 | #ifdef _LANG_c |
| 877 | case language_c: |
| 878 | case language_cplus: |
| 879 | switch(op) |
| 880 | { |
| 881 | case BINOP_DIV: |
| 882 | if (!numeric_type(t1) || !numeric_type(t2)) |
| 883 | type_op_error ("Arguments to %s must be numbers.",op); |
| 884 | break; |
| 885 | } |
| 886 | break; |
| 887 | #endif |
| 888 | |
| 889 | #ifdef _LANG_m2 |
| 890 | case language_m2: |
| 891 | switch(op) |
| 892 | { |
| 893 | case BINOP_DIV: |
| 894 | if (!float_type(t1) || !float_type(t2)) |
| 895 | type_op_error ("Arguments to %s must be floating point numbers.",op); |
| 896 | break; |
| 897 | case BINOP_INTDIV: |
| 898 | if (!integral_type(t1) || !integral_type(t2)) |
| 899 | type_op_error ("Arguments to %s must be of integral type.",op); |
| 900 | break; |
| 901 | } |
| 902 | #endif |
| 903 | } |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | #endif /* 0 */ |
| 908 | |
| 909 | \f |
| 910 | /* This page contains functions for the printing out of |
| 911 | error messages that occur during type- and range- |
| 912 | checking. */ |
| 913 | |
| 914 | /* Prints the format string FMT with the operator as a string |
| 915 | corresponding to the opcode OP. If FATAL is non-zero, then |
| 916 | this is an error and error () is called. Otherwise, it is |
| 917 | a warning and printf() is called. */ |
| 918 | void |
| 919 | op_error (fmt,op,fatal) |
| 920 | char *fmt; |
| 921 | enum exp_opcode op; |
| 922 | int fatal; |
| 923 | { |
| 924 | if (fatal) |
| 925 | error (fmt,op_string(op)); |
| 926 | else |
| 927 | { |
| 928 | warning (fmt,op_string(op)); |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | /* These are called when a language fails a type- or range-check. |
| 933 | The first argument should be a printf()-style format string, and |
| 934 | the rest of the arguments should be its arguments. If |
| 935 | [type|range]_check is [type|range]_check_on, then return_to_top_level() |
| 936 | is called in the style of error (). Otherwise, the message is prefixed |
| 937 | by the value of warning_pre_print and we do not return to the top level. */ |
| 938 | |
| 939 | void |
| 940 | type_error (va_alist) |
| 941 | va_dcl |
| 942 | { |
| 943 | va_list args; |
| 944 | char *string; |
| 945 | |
| 946 | if (type_check==type_check_warn) |
| 947 | fprintf(stderr,warning_pre_print); |
| 948 | else |
| 949 | target_terminal_ours(); |
| 950 | |
| 951 | va_start (args); |
| 952 | string = va_arg (args, char *); |
| 953 | vfprintf (stderr, string, args); |
| 954 | fprintf (stderr, "\n"); |
| 955 | va_end (args); |
| 956 | if (type_check==type_check_on) |
| 957 | return_to_top_level(); |
| 958 | } |
| 959 | |
| 960 | void |
| 961 | range_error (va_alist) |
| 962 | va_dcl |
| 963 | { |
| 964 | va_list args; |
| 965 | char *string; |
| 966 | |
| 967 | if (range_check==range_check_warn) |
| 968 | fprintf(stderr,warning_pre_print); |
| 969 | else |
| 970 | target_terminal_ours(); |
| 971 | |
| 972 | va_start (args); |
| 973 | string = va_arg (args, char *); |
| 974 | vfprintf (stderr, string, args); |
| 975 | fprintf (stderr, "\n"); |
| 976 | va_end (args); |
| 977 | if (range_check==range_check_on) |
| 978 | return_to_top_level(); |
| 979 | } |
| 980 | |
| 981 | \f |
| 982 | /* This page contains miscellaneous functions */ |
| 983 | |
| 984 | /* Return the language as a string */ |
| 985 | char * |
| 986 | language_str(lang) |
| 987 | enum language lang; |
| 988 | { |
| 989 | int i; |
| 990 | |
| 991 | for (i = 0; i < languages_size; i++) { |
| 992 | if (languages[i]->la_language == lang) { |
| 993 | return languages[i]->la_name; |
| 994 | } |
| 995 | } |
| 996 | return "Unknown"; |
| 997 | } |
| 998 | |
| 999 | static void |
| 1000 | set_check (ignore, from_tty) |
| 1001 | char *ignore; |
| 1002 | int from_tty; |
| 1003 | { |
| 1004 | printf( |
| 1005 | "\"set check\" must be followed by the name of a check subcommand.\n"); |
| 1006 | help_list(setchecklist, "set check ", -1, stdout); |
| 1007 | } |
| 1008 | |
| 1009 | static void |
| 1010 | show_check (ignore, from_tty) |
| 1011 | char *ignore; |
| 1012 | int from_tty; |
| 1013 | { |
| 1014 | cmd_show_list(showchecklist, from_tty, ""); |
| 1015 | } |
| 1016 | \f |
| 1017 | /* Add a language to the set of known languages. */ |
| 1018 | |
| 1019 | void |
| 1020 | add_language (lang) |
| 1021 | const struct language_defn *lang; |
| 1022 | { |
| 1023 | if (lang->la_magic != LANG_MAGIC) |
| 1024 | { |
| 1025 | fprintf(stderr, "Magic number of %s language struct wrong\n", |
| 1026 | lang->la_name); |
| 1027 | abort(); |
| 1028 | } |
| 1029 | |
| 1030 | if (!languages) |
| 1031 | { |
| 1032 | languages_allocsize = DEFAULT_ALLOCSIZE; |
| 1033 | languages = (const struct language_defn **) xmalloc |
| 1034 | (languages_allocsize * sizeof (*languages)); |
| 1035 | } |
| 1036 | if (languages_size >= languages_allocsize) |
| 1037 | { |
| 1038 | languages_allocsize *= 2; |
| 1039 | languages = (const struct language_defn **) xrealloc ((char *) languages, |
| 1040 | languages_allocsize * sizeof (*languages)); |
| 1041 | } |
| 1042 | languages[languages_size++] = lang; |
| 1043 | } |
| 1044 | |
| 1045 | /* Define the language that is no language. */ |
| 1046 | |
| 1047 | static int |
| 1048 | unk_lang_parser () |
| 1049 | { |
| 1050 | return 1; |
| 1051 | } |
| 1052 | |
| 1053 | static void |
| 1054 | unk_lang_error (msg) |
| 1055 | char *msg; |
| 1056 | { |
| 1057 | error ("Attempted to parse an expression with unknown language"); |
| 1058 | } |
| 1059 | |
| 1060 | static struct type ** const (unknown_builtin_types[]) = { 0 }; |
| 1061 | static const struct op_print unk_op_print_tab[] = { 0 }; |
| 1062 | |
| 1063 | const struct language_defn unknown_language_defn = { |
| 1064 | "unknown", |
| 1065 | language_unknown, |
| 1066 | &unknown_builtin_types[0], |
| 1067 | range_check_off, |
| 1068 | type_check_off, |
| 1069 | unk_lang_parser, |
| 1070 | unk_lang_error, |
| 1071 | &builtin_type_error, /* longest signed integral type */ |
| 1072 | &builtin_type_error, /* longest unsigned integral type */ |
| 1073 | &builtin_type_error, /* longest floating point type */ |
| 1074 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ |
| 1075 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ |
| 1076 | unk_op_print_tab, /* expression operators for printing */ |
| 1077 | LANG_MAGIC |
| 1078 | }; |
| 1079 | |
| 1080 | /* These two structs define fake entries for the "local" and "auto" options. */ |
| 1081 | const struct language_defn auto_language_defn = { |
| 1082 | "auto", |
| 1083 | language_auto, |
| 1084 | &unknown_builtin_types[0], |
| 1085 | range_check_off, |
| 1086 | type_check_off, |
| 1087 | unk_lang_parser, |
| 1088 | unk_lang_error, |
| 1089 | &builtin_type_error, /* longest signed integral type */ |
| 1090 | &builtin_type_error, /* longest unsigned integral type */ |
| 1091 | &builtin_type_error, /* longest floating point type */ |
| 1092 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ |
| 1093 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ |
| 1094 | unk_op_print_tab, /* expression operators for printing */ |
| 1095 | LANG_MAGIC |
| 1096 | }; |
| 1097 | |
| 1098 | const struct language_defn local_language_defn = { |
| 1099 | "local", |
| 1100 | language_auto, |
| 1101 | &unknown_builtin_types[0], |
| 1102 | range_check_off, |
| 1103 | type_check_off, |
| 1104 | unk_lang_parser, |
| 1105 | unk_lang_error, |
| 1106 | &builtin_type_error, /* longest signed integral type */ |
| 1107 | &builtin_type_error, /* longest unsigned integral type */ |
| 1108 | &builtin_type_error, /* longest floating point type */ |
| 1109 | "0x%x", "0x%", "x", /* Hex format, prefix, suffix */ |
| 1110 | "0%o", "0%", "o", /* Octal format, prefix, suffix */ |
| 1111 | unk_op_print_tab, /* expression operators for printing */ |
| 1112 | LANG_MAGIC |
| 1113 | }; |
| 1114 | \f |
| 1115 | /* Initialize the language routines */ |
| 1116 | |
| 1117 | void |
| 1118 | _initialize_language() |
| 1119 | { |
| 1120 | struct cmd_list_element *set, *show; |
| 1121 | |
| 1122 | /* GDB commands for language specific stuff */ |
| 1123 | |
| 1124 | set = add_set_cmd ("language", class_support, var_string_noescape, |
| 1125 | (char *)&language, |
| 1126 | "Set the current source language.", |
| 1127 | &setlist); |
| 1128 | show = add_show_from_set (set, &showlist); |
| 1129 | set->function.cfunc = set_language_command; |
| 1130 | show->function.cfunc = show_language_command; |
| 1131 | |
| 1132 | add_prefix_cmd ("check", no_class, set_check, |
| 1133 | "Set the status of the type/range checker", |
| 1134 | &setchecklist, "set check ", 0, &setlist); |
| 1135 | add_alias_cmd ("c", "check", no_class, 1, &setlist); |
| 1136 | add_alias_cmd ("ch", "check", no_class, 1, &setlist); |
| 1137 | |
| 1138 | add_prefix_cmd ("check", no_class, show_check, |
| 1139 | "Show the status of the type/range checker", |
| 1140 | &showchecklist, "show check ", 0, &showlist); |
| 1141 | add_alias_cmd ("c", "check", no_class, 1, &showlist); |
| 1142 | add_alias_cmd ("ch", "check", no_class, 1, &showlist); |
| 1143 | |
| 1144 | set = add_set_cmd ("type", class_support, var_string_noescape, |
| 1145 | (char *)&type, |
| 1146 | "Set type checking. (on/warn/off/auto)", |
| 1147 | &setchecklist); |
| 1148 | show = add_show_from_set (set, &showchecklist); |
| 1149 | set->function.cfunc = set_type_command; |
| 1150 | show->function.cfunc = show_type_command; |
| 1151 | |
| 1152 | set = add_set_cmd ("range", class_support, var_string_noescape, |
| 1153 | (char *)&range, |
| 1154 | "Set range checking. (on/warn/off/auto)", |
| 1155 | &setchecklist); |
| 1156 | show = add_show_from_set (set, &showchecklist); |
| 1157 | set->function.cfunc = set_range_command; |
| 1158 | show->function.cfunc = show_range_command; |
| 1159 | |
| 1160 | add_language (&unknown_language_defn); |
| 1161 | add_language (&local_language_defn); |
| 1162 | add_language (&auto_language_defn); |
| 1163 | |
| 1164 | language = savestring ("auto",strlen("auto")); |
| 1165 | range = savestring ("auto",strlen("auto")); |
| 1166 | type = savestring ("auto",strlen("auto")); |
| 1167 | |
| 1168 | /* Have the above take effect */ |
| 1169 | |
| 1170 | set_language_command (language, 0); |
| 1171 | set_type_command (NULL, 0); |
| 1172 | set_range_command (NULL, 0); |
| 1173 | } |