| 1 | /* Modula 2 language support routines for GDB, the GNU debugger. |
| 2 | Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2002 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "symtab.h" |
| 24 | #include "gdbtypes.h" |
| 25 | #include "expression.h" |
| 26 | #include "parser-defs.h" |
| 27 | #include "language.h" |
| 28 | #include "m2-lang.h" |
| 29 | #include "c-lang.h" |
| 30 | #include "valprint.h" |
| 31 | |
| 32 | extern void _initialize_m2_language (void); |
| 33 | static struct type *m2_create_fundamental_type (struct objfile *, int); |
| 34 | static void m2_printstr (struct ui_file * stream, char *string, |
| 35 | unsigned int length, int width, |
| 36 | int force_ellipses); |
| 37 | static void m2_printchar (int, struct ui_file *); |
| 38 | static void m2_emit_char (int, struct ui_file *, int); |
| 39 | |
| 40 | /* Print the character C on STREAM as part of the contents of a literal |
| 41 | string whose delimiter is QUOTER. Note that that format for printing |
| 42 | characters and strings is language specific. |
| 43 | FIXME: This is a copy of the same function from c-exp.y. It should |
| 44 | be replaced with a true Modula version. |
| 45 | */ |
| 46 | |
| 47 | static void |
| 48 | m2_emit_char (int c, struct ui_file *stream, int quoter) |
| 49 | { |
| 50 | |
| 51 | c &= 0xFF; /* Avoid sign bit follies */ |
| 52 | |
| 53 | if (PRINT_LITERAL_FORM (c)) |
| 54 | { |
| 55 | if (c == '\\' || c == quoter) |
| 56 | { |
| 57 | fputs_filtered ("\\", stream); |
| 58 | } |
| 59 | fprintf_filtered (stream, "%c", c); |
| 60 | } |
| 61 | else |
| 62 | { |
| 63 | switch (c) |
| 64 | { |
| 65 | case '\n': |
| 66 | fputs_filtered ("\\n", stream); |
| 67 | break; |
| 68 | case '\b': |
| 69 | fputs_filtered ("\\b", stream); |
| 70 | break; |
| 71 | case '\t': |
| 72 | fputs_filtered ("\\t", stream); |
| 73 | break; |
| 74 | case '\f': |
| 75 | fputs_filtered ("\\f", stream); |
| 76 | break; |
| 77 | case '\r': |
| 78 | fputs_filtered ("\\r", stream); |
| 79 | break; |
| 80 | case '\033': |
| 81 | fputs_filtered ("\\e", stream); |
| 82 | break; |
| 83 | case '\007': |
| 84 | fputs_filtered ("\\a", stream); |
| 85 | break; |
| 86 | default: |
| 87 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); |
| 88 | break; |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | /* FIXME: This is a copy of the same function from c-exp.y. It should |
| 94 | be replaced with a true Modula version. */ |
| 95 | |
| 96 | static void |
| 97 | m2_printchar (int c, struct ui_file *stream) |
| 98 | { |
| 99 | fputs_filtered ("'", stream); |
| 100 | LA_EMIT_CHAR (c, stream, '\''); |
| 101 | fputs_filtered ("'", stream); |
| 102 | } |
| 103 | |
| 104 | /* Print the character string STRING, printing at most LENGTH characters. |
| 105 | Printing stops early if the number hits print_max; repeat counts |
| 106 | are printed as appropriate. Print ellipses at the end if we |
| 107 | had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. |
| 108 | FIXME: This is a copy of the same function from c-exp.y. It should |
| 109 | be replaced with a true Modula version. */ |
| 110 | |
| 111 | static void |
| 112 | m2_printstr (struct ui_file *stream, char *string, unsigned int length, |
| 113 | int width, int force_ellipses) |
| 114 | { |
| 115 | unsigned int i; |
| 116 | unsigned int things_printed = 0; |
| 117 | int in_quotes = 0; |
| 118 | int need_comma = 0; |
| 119 | |
| 120 | if (length == 0) |
| 121 | { |
| 122 | fputs_filtered ("\"\"", gdb_stdout); |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | for (i = 0; i < length && things_printed < print_max; ++i) |
| 127 | { |
| 128 | /* Position of the character we are examining |
| 129 | to see whether it is repeated. */ |
| 130 | unsigned int rep1; |
| 131 | /* Number of repetitions we have detected so far. */ |
| 132 | unsigned int reps; |
| 133 | |
| 134 | QUIT; |
| 135 | |
| 136 | if (need_comma) |
| 137 | { |
| 138 | fputs_filtered (", ", stream); |
| 139 | need_comma = 0; |
| 140 | } |
| 141 | |
| 142 | rep1 = i + 1; |
| 143 | reps = 1; |
| 144 | while (rep1 < length && string[rep1] == string[i]) |
| 145 | { |
| 146 | ++rep1; |
| 147 | ++reps; |
| 148 | } |
| 149 | |
| 150 | if (reps > repeat_count_threshold) |
| 151 | { |
| 152 | if (in_quotes) |
| 153 | { |
| 154 | if (inspect_it) |
| 155 | fputs_filtered ("\\\", ", stream); |
| 156 | else |
| 157 | fputs_filtered ("\", ", stream); |
| 158 | in_quotes = 0; |
| 159 | } |
| 160 | m2_printchar (string[i], stream); |
| 161 | fprintf_filtered (stream, " <repeats %u times>", reps); |
| 162 | i = rep1 - 1; |
| 163 | things_printed += repeat_count_threshold; |
| 164 | need_comma = 1; |
| 165 | } |
| 166 | else |
| 167 | { |
| 168 | if (!in_quotes) |
| 169 | { |
| 170 | if (inspect_it) |
| 171 | fputs_filtered ("\\\"", stream); |
| 172 | else |
| 173 | fputs_filtered ("\"", stream); |
| 174 | in_quotes = 1; |
| 175 | } |
| 176 | LA_EMIT_CHAR (string[i], stream, '"'); |
| 177 | ++things_printed; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /* Terminate the quotes if necessary. */ |
| 182 | if (in_quotes) |
| 183 | { |
| 184 | if (inspect_it) |
| 185 | fputs_filtered ("\\\"", stream); |
| 186 | else |
| 187 | fputs_filtered ("\"", stream); |
| 188 | } |
| 189 | |
| 190 | if (force_ellipses || i < length) |
| 191 | fputs_filtered ("...", stream); |
| 192 | } |
| 193 | |
| 194 | /* FIXME: This is a copy of c_create_fundamental_type(), before |
| 195 | all the non-C types were stripped from it. Needs to be fixed |
| 196 | by an experienced Modula programmer. */ |
| 197 | |
| 198 | static struct type * |
| 199 | m2_create_fundamental_type (struct objfile *objfile, int typeid) |
| 200 | { |
| 201 | struct type *type = NULL; |
| 202 | |
| 203 | switch (typeid) |
| 204 | { |
| 205 | default: |
| 206 | /* FIXME: For now, if we are asked to produce a type not in this |
| 207 | language, create the equivalent of a C integer type with the |
| 208 | name "<?type?>". When all the dust settles from the type |
| 209 | reconstruction work, this should probably become an error. */ |
| 210 | type = init_type (TYPE_CODE_INT, |
| 211 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 212 | 0, "<?type?>", objfile); |
| 213 | warning ("internal error: no Modula fundamental type %d", typeid); |
| 214 | break; |
| 215 | case FT_VOID: |
| 216 | type = init_type (TYPE_CODE_VOID, |
| 217 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 218 | 0, "void", objfile); |
| 219 | break; |
| 220 | case FT_BOOLEAN: |
| 221 | type = init_type (TYPE_CODE_BOOL, |
| 222 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 223 | TYPE_FLAG_UNSIGNED, "boolean", objfile); |
| 224 | break; |
| 225 | case FT_STRING: |
| 226 | type = init_type (TYPE_CODE_STRING, |
| 227 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 228 | 0, "string", objfile); |
| 229 | break; |
| 230 | case FT_CHAR: |
| 231 | type = init_type (TYPE_CODE_INT, |
| 232 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 233 | 0, "char", objfile); |
| 234 | break; |
| 235 | case FT_SIGNED_CHAR: |
| 236 | type = init_type (TYPE_CODE_INT, |
| 237 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 238 | 0, "signed char", objfile); |
| 239 | break; |
| 240 | case FT_UNSIGNED_CHAR: |
| 241 | type = init_type (TYPE_CODE_INT, |
| 242 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 243 | TYPE_FLAG_UNSIGNED, "unsigned char", objfile); |
| 244 | break; |
| 245 | case FT_SHORT: |
| 246 | type = init_type (TYPE_CODE_INT, |
| 247 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 248 | 0, "short", objfile); |
| 249 | break; |
| 250 | case FT_SIGNED_SHORT: |
| 251 | type = init_type (TYPE_CODE_INT, |
| 252 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 253 | 0, "short", objfile); /* FIXME-fnf */ |
| 254 | break; |
| 255 | case FT_UNSIGNED_SHORT: |
| 256 | type = init_type (TYPE_CODE_INT, |
| 257 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, |
| 258 | TYPE_FLAG_UNSIGNED, "unsigned short", objfile); |
| 259 | break; |
| 260 | case FT_INTEGER: |
| 261 | type = init_type (TYPE_CODE_INT, |
| 262 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 263 | 0, "int", objfile); |
| 264 | break; |
| 265 | case FT_SIGNED_INTEGER: |
| 266 | type = init_type (TYPE_CODE_INT, |
| 267 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 268 | 0, "int", objfile); /* FIXME -fnf */ |
| 269 | break; |
| 270 | case FT_UNSIGNED_INTEGER: |
| 271 | type = init_type (TYPE_CODE_INT, |
| 272 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 273 | TYPE_FLAG_UNSIGNED, "unsigned int", objfile); |
| 274 | break; |
| 275 | case FT_FIXED_DECIMAL: |
| 276 | type = init_type (TYPE_CODE_INT, |
| 277 | TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 278 | 0, "fixed decimal", objfile); |
| 279 | break; |
| 280 | case FT_LONG: |
| 281 | type = init_type (TYPE_CODE_INT, |
| 282 | TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 283 | 0, "long", objfile); |
| 284 | break; |
| 285 | case FT_SIGNED_LONG: |
| 286 | type = init_type (TYPE_CODE_INT, |
| 287 | TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 288 | 0, "long", objfile); /* FIXME -fnf */ |
| 289 | break; |
| 290 | case FT_UNSIGNED_LONG: |
| 291 | type = init_type (TYPE_CODE_INT, |
| 292 | TARGET_LONG_BIT / TARGET_CHAR_BIT, |
| 293 | TYPE_FLAG_UNSIGNED, "unsigned long", objfile); |
| 294 | break; |
| 295 | case FT_LONG_LONG: |
| 296 | type = init_type (TYPE_CODE_INT, |
| 297 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 298 | 0, "long long", objfile); |
| 299 | break; |
| 300 | case FT_SIGNED_LONG_LONG: |
| 301 | type = init_type (TYPE_CODE_INT, |
| 302 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 303 | 0, "signed long long", objfile); |
| 304 | break; |
| 305 | case FT_UNSIGNED_LONG_LONG: |
| 306 | type = init_type (TYPE_CODE_INT, |
| 307 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, |
| 308 | TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); |
| 309 | break; |
| 310 | case FT_FLOAT: |
| 311 | type = init_type (TYPE_CODE_FLT, |
| 312 | TARGET_FLOAT_BIT / TARGET_CHAR_BIT, |
| 313 | 0, "float", objfile); |
| 314 | break; |
| 315 | case FT_DBL_PREC_FLOAT: |
| 316 | type = init_type (TYPE_CODE_FLT, |
| 317 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 318 | 0, "double", objfile); |
| 319 | break; |
| 320 | case FT_FLOAT_DECIMAL: |
| 321 | type = init_type (TYPE_CODE_FLT, |
| 322 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 323 | 0, "floating decimal", objfile); |
| 324 | break; |
| 325 | case FT_EXT_PREC_FLOAT: |
| 326 | type = init_type (TYPE_CODE_FLT, |
| 327 | TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 328 | 0, "long double", objfile); |
| 329 | break; |
| 330 | case FT_COMPLEX: |
| 331 | type = init_type (TYPE_CODE_COMPLEX, |
| 332 | 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT, |
| 333 | 0, "complex", objfile); |
| 334 | TYPE_TARGET_TYPE (type) |
| 335 | = m2_create_fundamental_type (objfile, FT_FLOAT); |
| 336 | break; |
| 337 | case FT_DBL_PREC_COMPLEX: |
| 338 | type = init_type (TYPE_CODE_COMPLEX, |
| 339 | 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 340 | 0, "double complex", objfile); |
| 341 | TYPE_TARGET_TYPE (type) |
| 342 | = m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT); |
| 343 | break; |
| 344 | case FT_EXT_PREC_COMPLEX: |
| 345 | type = init_type (TYPE_CODE_COMPLEX, |
| 346 | 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, |
| 347 | 0, "long double complex", objfile); |
| 348 | TYPE_TARGET_TYPE (type) |
| 349 | = m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT); |
| 350 | break; |
| 351 | } |
| 352 | return (type); |
| 353 | } |
| 354 | \f |
| 355 | |
| 356 | /* Table of operators and their precedences for printing expressions. */ |
| 357 | |
| 358 | static const struct op_print m2_op_print_tab[] = |
| 359 | { |
| 360 | {"+", BINOP_ADD, PREC_ADD, 0}, |
| 361 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, |
| 362 | {"-", BINOP_SUB, PREC_ADD, 0}, |
| 363 | {"-", UNOP_NEG, PREC_PREFIX, 0}, |
| 364 | {"*", BINOP_MUL, PREC_MUL, 0}, |
| 365 | {"/", BINOP_DIV, PREC_MUL, 0}, |
| 366 | {"DIV", BINOP_INTDIV, PREC_MUL, 0}, |
| 367 | {"MOD", BINOP_REM, PREC_MUL, 0}, |
| 368 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, |
| 369 | {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, |
| 370 | {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, |
| 371 | {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, |
| 372 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, |
| 373 | {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0}, |
| 374 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, |
| 375 | {">=", BINOP_GEQ, PREC_ORDER, 0}, |
| 376 | {">", BINOP_GTR, PREC_ORDER, 0}, |
| 377 | {"<", BINOP_LESS, PREC_ORDER, 0}, |
| 378 | {"^", UNOP_IND, PREC_PREFIX, 0}, |
| 379 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, |
| 380 | {"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0}, |
| 381 | {"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0}, |
| 382 | {"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0}, |
| 383 | {"FLOAT", UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0}, |
| 384 | {"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0}, |
| 385 | {"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0}, |
| 386 | {"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0}, |
| 387 | {"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0}, |
| 388 | {"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0}, |
| 389 | {NULL, 0, 0, 0} |
| 390 | }; |
| 391 | \f |
| 392 | /* The built-in types of Modula-2. */ |
| 393 | |
| 394 | struct type *builtin_type_m2_char; |
| 395 | struct type *builtin_type_m2_int; |
| 396 | struct type *builtin_type_m2_card; |
| 397 | struct type *builtin_type_m2_real; |
| 398 | struct type *builtin_type_m2_bool; |
| 399 | |
| 400 | struct type **const (m2_builtin_types[]) = |
| 401 | { |
| 402 | &builtin_type_m2_char, |
| 403 | &builtin_type_m2_int, |
| 404 | &builtin_type_m2_card, |
| 405 | &builtin_type_m2_real, |
| 406 | &builtin_type_m2_bool, |
| 407 | 0 |
| 408 | }; |
| 409 | |
| 410 | const struct language_defn m2_language_defn = |
| 411 | { |
| 412 | "modula-2", |
| 413 | language_m2, |
| 414 | m2_builtin_types, |
| 415 | range_check_on, |
| 416 | type_check_on, |
| 417 | case_sensitive_on, |
| 418 | &exp_descriptor_standard, |
| 419 | m2_parse, /* parser */ |
| 420 | m2_error, /* parser error function */ |
| 421 | m2_printchar, /* Print character constant */ |
| 422 | m2_printstr, /* function to print string constant */ |
| 423 | m2_emit_char, /* Function to print a single character */ |
| 424 | m2_create_fundamental_type, /* Create fundamental type in this language */ |
| 425 | m2_print_type, /* Print a type using appropriate syntax */ |
| 426 | m2_val_print, /* Print a value using appropriate syntax */ |
| 427 | c_value_print, /* Print a top-level value */ |
| 428 | NULL, /* Language specific skip_trampoline */ |
| 429 | value_of_this, /* value_of_this */ |
| 430 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 431 | NULL, /* Language specific symbol demangler */ |
| 432 | {"", "", "", ""}, /* Binary format info */ |
| 433 | {"%loB", "", "o", "B"}, /* Octal format info */ |
| 434 | {"%ld", "", "d", ""}, /* Decimal format info */ |
| 435 | {"0%lXH", "0", "X", "H"}, /* Hex format info */ |
| 436 | m2_op_print_tab, /* expression operators for printing */ |
| 437 | 0, /* arrays are first-class (not c-style) */ |
| 438 | 0, /* String lower bound */ |
| 439 | &builtin_type_m2_char, /* Type of string elements */ |
| 440 | default_word_break_characters, |
| 441 | LANG_MAGIC |
| 442 | }; |
| 443 | |
| 444 | /* Initialization for Modula-2 */ |
| 445 | |
| 446 | void |
| 447 | _initialize_m2_language (void) |
| 448 | { |
| 449 | /* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */ |
| 450 | builtin_type_m2_int = |
| 451 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 452 | 0, |
| 453 | "INTEGER", (struct objfile *) NULL); |
| 454 | builtin_type_m2_card = |
| 455 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 456 | TYPE_FLAG_UNSIGNED, |
| 457 | "CARDINAL", (struct objfile *) NULL); |
| 458 | builtin_type_m2_real = |
| 459 | init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT, |
| 460 | 0, |
| 461 | "REAL", (struct objfile *) NULL); |
| 462 | builtin_type_m2_char = |
| 463 | init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
| 464 | TYPE_FLAG_UNSIGNED, |
| 465 | "CHAR", (struct objfile *) NULL); |
| 466 | builtin_type_m2_bool = |
| 467 | init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT, |
| 468 | TYPE_FLAG_UNSIGNED, |
| 469 | "BOOLEAN", (struct objfile *) NULL); |
| 470 | |
| 471 | add_language (&m2_language_defn); |
| 472 | } |