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22e39759 FF |
1 | /* Modula 2 language support routines for GDB, the GNU debugger. |
2 | Copyright 1992 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
6c9638b4 | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
22e39759 FF |
19 | |
20 | #include "defs.h" | |
21 | #include "symtab.h" | |
22 | #include "gdbtypes.h" | |
23 | #include "expression.h" | |
24 | #include "parser-defs.h" | |
25 | #include "language.h" | |
26 | #include "m2-lang.h" | |
e10cfcaa | 27 | #include "c-lang.h" |
22e39759 | 28 | |
b607efe7 | 29 | static struct type *m2_create_fundamental_type PARAMS ((struct objfile *, int)); |
242c0d81 | 30 | static void m2_printstr PARAMS ((GDB_FILE *stream, char *string, unsigned int length, int width, int force_ellipses)); |
b607efe7 | 31 | static void m2_printchar PARAMS ((int, GDB_FILE *)); |
242c0d81 | 32 | static void m2_emit_char PARAMS ((int, GDB_FILE *, int)); |
b607efe7 | 33 | |
22e39759 FF |
34 | /* Print the character C on STREAM as part of the contents of a literal |
35 | string whose delimiter is QUOTER. Note that that format for printing | |
36 | characters and strings is language specific. | |
37 | FIXME: This is a copy of the same function from c-exp.y. It should | |
38 | be replaced with a true Modula version. | |
39 | */ | |
40 | ||
41 | static void | |
242c0d81 | 42 | m2_emit_char (c, stream, quoter) |
22e39759 | 43 | register int c; |
199b2450 | 44 | GDB_FILE *stream; |
22e39759 FF |
45 | int quoter; |
46 | { | |
47 | ||
48 | c &= 0xFF; /* Avoid sign bit follies */ | |
49 | ||
50 | if (PRINT_LITERAL_FORM (c)) | |
51 | { | |
52 | if (c == '\\' || c == quoter) | |
53 | { | |
54 | fputs_filtered ("\\", stream); | |
55 | } | |
56 | fprintf_filtered (stream, "%c", c); | |
57 | } | |
58 | else | |
59 | { | |
60 | switch (c) | |
61 | { | |
62 | case '\n': | |
63 | fputs_filtered ("\\n", stream); | |
64 | break; | |
65 | case '\b': | |
66 | fputs_filtered ("\\b", stream); | |
67 | break; | |
68 | case '\t': | |
69 | fputs_filtered ("\\t", stream); | |
70 | break; | |
71 | case '\f': | |
72 | fputs_filtered ("\\f", stream); | |
73 | break; | |
74 | case '\r': | |
75 | fputs_filtered ("\\r", stream); | |
76 | break; | |
77 | case '\033': | |
78 | fputs_filtered ("\\e", stream); | |
79 | break; | |
80 | case '\007': | |
81 | fputs_filtered ("\\a", stream); | |
82 | break; | |
83 | default: | |
84 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
85 | break; | |
86 | } | |
87 | } | |
88 | } | |
89 | ||
90 | /* FIXME: This is a copy of the same function from c-exp.y. It should | |
91 | be replaced with a true Modula version. */ | |
92 | ||
93 | static void | |
94 | m2_printchar (c, stream) | |
95 | int c; | |
199b2450 | 96 | GDB_FILE *stream; |
22e39759 FF |
97 | { |
98 | fputs_filtered ("'", stream); | |
242c0d81 | 99 | LA_EMIT_CHAR (c, stream, '\''); |
22e39759 FF |
100 | fputs_filtered ("'", stream); |
101 | } | |
102 | ||
103 | /* Print the character string STRING, printing at most LENGTH characters. | |
104 | Printing stops early if the number hits print_max; repeat counts | |
105 | are printed as appropriate. Print ellipses at the end if we | |
106 | had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. | |
107 | FIXME: This is a copy of the same function from c-exp.y. It should | |
108 | be replaced with a true Modula version. */ | |
109 | ||
110 | static void | |
242c0d81 | 111 | m2_printstr (stream, string, length, width, force_ellipses) |
199b2450 | 112 | GDB_FILE *stream; |
22e39759 FF |
113 | char *string; |
114 | unsigned int length; | |
242c0d81 | 115 | int width; |
22e39759 FF |
116 | int force_ellipses; |
117 | { | |
118 | register unsigned int i; | |
119 | unsigned int things_printed = 0; | |
120 | int in_quotes = 0; | |
121 | int need_comma = 0; | |
122 | extern int inspect_it; | |
123 | extern int repeat_count_threshold; | |
124 | extern int print_max; | |
125 | ||
126 | if (length == 0) | |
127 | { | |
199b2450 | 128 | fputs_filtered ("\"\"", gdb_stdout); |
22e39759 FF |
129 | return; |
130 | } | |
131 | ||
132 | for (i = 0; i < length && things_printed < print_max; ++i) | |
133 | { | |
134 | /* Position of the character we are examining | |
135 | to see whether it is repeated. */ | |
136 | unsigned int rep1; | |
137 | /* Number of repetitions we have detected so far. */ | |
138 | unsigned int reps; | |
139 | ||
140 | QUIT; | |
141 | ||
142 | if (need_comma) | |
143 | { | |
144 | fputs_filtered (", ", stream); | |
145 | need_comma = 0; | |
146 | } | |
147 | ||
148 | rep1 = i + 1; | |
149 | reps = 1; | |
150 | while (rep1 < length && string[rep1] == string[i]) | |
151 | { | |
152 | ++rep1; | |
153 | ++reps; | |
154 | } | |
155 | ||
156 | if (reps > repeat_count_threshold) | |
157 | { | |
158 | if (in_quotes) | |
159 | { | |
160 | if (inspect_it) | |
161 | fputs_filtered ("\\\", ", stream); | |
162 | else | |
163 | fputs_filtered ("\", ", stream); | |
164 | in_quotes = 0; | |
165 | } | |
166 | m2_printchar (string[i], stream); | |
167 | fprintf_filtered (stream, " <repeats %u times>", reps); | |
168 | i = rep1 - 1; | |
169 | things_printed += repeat_count_threshold; | |
170 | need_comma = 1; | |
171 | } | |
172 | else | |
173 | { | |
174 | if (!in_quotes) | |
175 | { | |
176 | if (inspect_it) | |
177 | fputs_filtered ("\\\"", stream); | |
178 | else | |
179 | fputs_filtered ("\"", stream); | |
180 | in_quotes = 1; | |
181 | } | |
242c0d81 | 182 | LA_EMIT_CHAR (string[i], stream, '"'); |
22e39759 FF |
183 | ++things_printed; |
184 | } | |
185 | } | |
186 | ||
187 | /* Terminate the quotes if necessary. */ | |
188 | if (in_quotes) | |
189 | { | |
190 | if (inspect_it) | |
191 | fputs_filtered ("\\\"", stream); | |
192 | else | |
193 | fputs_filtered ("\"", stream); | |
194 | } | |
195 | ||
196 | if (force_ellipses || i < length) | |
197 | fputs_filtered ("...", stream); | |
198 | } | |
199 | ||
200 | /* FIXME: This is a copy of c_create_fundamental_type(), before | |
201 | all the non-C types were stripped from it. Needs to be fixed | |
202 | by an experienced Modula programmer. */ | |
203 | ||
204 | static struct type * | |
205 | m2_create_fundamental_type (objfile, typeid) | |
206 | struct objfile *objfile; | |
207 | int typeid; | |
208 | { | |
209 | register struct type *type = NULL; | |
22e39759 FF |
210 | |
211 | switch (typeid) | |
212 | { | |
213 | default: | |
214 | /* FIXME: For now, if we are asked to produce a type not in this | |
215 | language, create the equivalent of a C integer type with the | |
216 | name "<?type?>". When all the dust settles from the type | |
217 | reconstruction work, this should probably become an error. */ | |
218 | type = init_type (TYPE_CODE_INT, | |
219 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
220 | 0, "<?type?>", objfile); | |
221 | warning ("internal error: no Modula fundamental type %d", typeid); | |
222 | break; | |
223 | case FT_VOID: | |
224 | type = init_type (TYPE_CODE_VOID, | |
225 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
226 | 0, "void", objfile); | |
227 | break; | |
228 | case FT_BOOLEAN: | |
229 | type = init_type (TYPE_CODE_BOOL, | |
230 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
231 | TYPE_FLAG_UNSIGNED, "boolean", objfile); | |
232 | break; | |
233 | case FT_STRING: | |
c4413e2c | 234 | type = init_type (TYPE_CODE_STRING, |
22e39759 FF |
235 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, |
236 | 0, "string", objfile); | |
237 | break; | |
238 | case FT_CHAR: | |
239 | type = init_type (TYPE_CODE_INT, | |
240 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
241 | 0, "char", objfile); | |
242 | break; | |
243 | case FT_SIGNED_CHAR: | |
244 | type = init_type (TYPE_CODE_INT, | |
245 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
dda398c3 | 246 | 0, "signed char", objfile); |
22e39759 FF |
247 | break; |
248 | case FT_UNSIGNED_CHAR: | |
249 | type = init_type (TYPE_CODE_INT, | |
250 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
251 | TYPE_FLAG_UNSIGNED, "unsigned char", objfile); | |
252 | break; | |
253 | case FT_SHORT: | |
254 | type = init_type (TYPE_CODE_INT, | |
255 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
256 | 0, "short", objfile); | |
257 | break; | |
258 | case FT_SIGNED_SHORT: | |
259 | type = init_type (TYPE_CODE_INT, | |
260 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
dda398c3 | 261 | 0, "short", objfile); /* FIXME-fnf */ |
22e39759 FF |
262 | break; |
263 | case FT_UNSIGNED_SHORT: | |
264 | type = init_type (TYPE_CODE_INT, | |
265 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
266 | TYPE_FLAG_UNSIGNED, "unsigned short", objfile); | |
267 | break; | |
268 | case FT_INTEGER: | |
269 | type = init_type (TYPE_CODE_INT, | |
270 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
271 | 0, "int", objfile); | |
272 | break; | |
273 | case FT_SIGNED_INTEGER: | |
274 | type = init_type (TYPE_CODE_INT, | |
275 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
dda398c3 | 276 | 0, "int", objfile); /* FIXME -fnf */ |
22e39759 FF |
277 | break; |
278 | case FT_UNSIGNED_INTEGER: | |
279 | type = init_type (TYPE_CODE_INT, | |
280 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
281 | TYPE_FLAG_UNSIGNED, "unsigned int", objfile); | |
282 | break; | |
283 | case FT_FIXED_DECIMAL: | |
284 | type = init_type (TYPE_CODE_INT, | |
285 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
286 | 0, "fixed decimal", objfile); | |
287 | break; | |
288 | case FT_LONG: | |
289 | type = init_type (TYPE_CODE_INT, | |
290 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
291 | 0, "long", objfile); | |
292 | break; | |
293 | case FT_SIGNED_LONG: | |
294 | type = init_type (TYPE_CODE_INT, | |
295 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
dda398c3 | 296 | 0, "long", objfile); /* FIXME -fnf */ |
22e39759 FF |
297 | break; |
298 | case FT_UNSIGNED_LONG: | |
299 | type = init_type (TYPE_CODE_INT, | |
300 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
301 | TYPE_FLAG_UNSIGNED, "unsigned long", objfile); | |
302 | break; | |
303 | case FT_LONG_LONG: | |
304 | type = init_type (TYPE_CODE_INT, | |
305 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
306 | 0, "long long", objfile); | |
307 | break; | |
308 | case FT_SIGNED_LONG_LONG: | |
309 | type = init_type (TYPE_CODE_INT, | |
310 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
dda398c3 | 311 | 0, "signed long long", objfile); |
22e39759 FF |
312 | break; |
313 | case FT_UNSIGNED_LONG_LONG: | |
314 | type = init_type (TYPE_CODE_INT, | |
315 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
316 | TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); | |
317 | break; | |
318 | case FT_FLOAT: | |
319 | type = init_type (TYPE_CODE_FLT, | |
320 | TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
321 | 0, "float", objfile); | |
322 | break; | |
323 | case FT_DBL_PREC_FLOAT: | |
324 | type = init_type (TYPE_CODE_FLT, | |
325 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
326 | 0, "double", objfile); | |
327 | break; | |
328 | case FT_FLOAT_DECIMAL: | |
329 | type = init_type (TYPE_CODE_FLT, | |
330 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
331 | 0, "floating decimal", objfile); | |
332 | break; | |
333 | case FT_EXT_PREC_FLOAT: | |
334 | type = init_type (TYPE_CODE_FLT, | |
335 | TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, | |
336 | 0, "long double", objfile); | |
337 | break; | |
338 | case FT_COMPLEX: | |
ead95f8a PB |
339 | type = init_type (TYPE_CODE_COMPLEX, |
340 | 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
22e39759 | 341 | 0, "complex", objfile); |
ead95f8a PB |
342 | TYPE_TARGET_TYPE (type) |
343 | = m2_create_fundamental_type (objfile, FT_FLOAT); | |
22e39759 FF |
344 | break; |
345 | case FT_DBL_PREC_COMPLEX: | |
ead95f8a PB |
346 | type = init_type (TYPE_CODE_COMPLEX, |
347 | 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
22e39759 | 348 | 0, "double complex", objfile); |
ead95f8a PB |
349 | TYPE_TARGET_TYPE (type) |
350 | = m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT); | |
22e39759 FF |
351 | break; |
352 | case FT_EXT_PREC_COMPLEX: | |
ead95f8a PB |
353 | type = init_type (TYPE_CODE_COMPLEX, |
354 | 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, | |
22e39759 | 355 | 0, "long double complex", objfile); |
ead95f8a PB |
356 | TYPE_TARGET_TYPE (type) |
357 | = m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT); | |
22e39759 FF |
358 | break; |
359 | } | |
360 | return (type); | |
361 | } | |
362 | ||
363 | \f | |
364 | /* Table of operators and their precedences for printing expressions. */ | |
365 | ||
a8a69e63 | 366 | static const struct op_print m2_op_print_tab[] = { |
22e39759 FF |
367 | {"+", BINOP_ADD, PREC_ADD, 0}, |
368 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, | |
369 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
370 | {"-", UNOP_NEG, PREC_PREFIX, 0}, | |
371 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
372 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
373 | {"DIV", BINOP_INTDIV, PREC_MUL, 0}, | |
374 | {"MOD", BINOP_REM, PREC_MUL, 0}, | |
375 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, | |
376 | {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, | |
377 | {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, | |
378 | {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
379 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
380 | {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
381 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
382 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
383 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
384 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
385 | {"^", UNOP_IND, PREC_PREFIX, 0}, | |
386 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, | |
61379835 PB |
387 | {"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0}, |
388 | {"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0}, | |
389 | {"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0}, | |
390 | {"FLOAT",UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0}, | |
391 | {"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0}, | |
392 | {"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0}, | |
393 | {"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0}, | |
394 | {"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0}, | |
395 | {"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0}, | |
22e39759 FF |
396 | {NULL, 0, 0, 0} |
397 | }; | |
398 | \f | |
399 | /* The built-in types of Modula-2. */ | |
400 | ||
401 | struct type *builtin_type_m2_char; | |
402 | struct type *builtin_type_m2_int; | |
403 | struct type *builtin_type_m2_card; | |
404 | struct type *builtin_type_m2_real; | |
405 | struct type *builtin_type_m2_bool; | |
406 | ||
8501c742 | 407 | struct type ** CONST_PTR (m2_builtin_types[]) = |
22e39759 FF |
408 | { |
409 | &builtin_type_m2_char, | |
410 | &builtin_type_m2_int, | |
411 | &builtin_type_m2_card, | |
412 | &builtin_type_m2_real, | |
413 | &builtin_type_m2_bool, | |
414 | 0 | |
415 | }; | |
416 | ||
417 | const struct language_defn m2_language_defn = { | |
418 | "modula-2", | |
419 | language_m2, | |
420 | m2_builtin_types, | |
421 | range_check_on, | |
422 | type_check_on, | |
423 | m2_parse, /* parser */ | |
424 | m2_error, /* parser error function */ | |
7398958c | 425 | evaluate_subexp_standard, |
22e39759 FF |
426 | m2_printchar, /* Print character constant */ |
427 | m2_printstr, /* function to print string constant */ | |
242c0d81 | 428 | m2_emit_char, /* Function to print a single character */ |
22e39759 | 429 | m2_create_fundamental_type, /* Create fundamental type in this language */ |
a8a69e63 FF |
430 | m2_print_type, /* Print a type using appropriate syntax */ |
431 | m2_val_print, /* Print a value using appropriate syntax */ | |
e10cfcaa | 432 | c_value_print, /* Print a top-level value */ |
22e39759 | 433 | {"", "", "", ""}, /* Binary format info */ |
5573d7d4 JK |
434 | {"%loB", "", "o", "B"}, /* Octal format info */ |
435 | {"%ld", "", "d", ""}, /* Decimal format info */ | |
436 | {"0%lXH", "0", "X", "H"}, /* Hex format info */ | |
22e39759 | 437 | m2_op_print_tab, /* expression operators for printing */ |
acc4efde | 438 | 0, /* arrays are first-class (not c-style) */ |
ead95f8a PB |
439 | 0, /* String lower bound */ |
440 | &builtin_type_m2_char, /* Type of string elements */ | |
22e39759 FF |
441 | LANG_MAGIC |
442 | }; | |
443 | ||
444 | /* Initialization for Modula-2 */ | |
445 | ||
446 | void | |
d62e7a20 | 447 | _initialize_m2_language () |
22e39759 FF |
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 | ||
22e39759 FF |
471 | add_language (&m2_language_defn); |
472 | } |