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c906108c SS |
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 | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
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" | |
27 | #include "c-lang.h" | |
28 | ||
392a587b | 29 | extern void _initialize_m2_language PARAMS ((void)); |
c906108c SS |
30 | static struct type *m2_create_fundamental_type PARAMS ((struct objfile *, int)); |
31 | static void m2_printstr PARAMS ((GDB_FILE *stream, char *string, unsigned int length, int width, int force_ellipses)); | |
32 | static void m2_printchar PARAMS ((int, GDB_FILE *)); | |
33 | static void m2_emit_char PARAMS ((int, GDB_FILE *, int)); | |
34 | ||
35 | /* Print the character C on STREAM as part of the contents of a literal | |
36 | string whose delimiter is QUOTER. Note that that format for printing | |
37 | characters and strings is language specific. | |
38 | FIXME: This is a copy of the same function from c-exp.y. It should | |
39 | be replaced with a true Modula version. | |
40 | */ | |
41 | ||
42 | static void | |
43 | m2_emit_char (c, stream, quoter) | |
44 | register int c; | |
45 | GDB_FILE *stream; | |
46 | int quoter; | |
47 | { | |
48 | ||
49 | c &= 0xFF; /* Avoid sign bit follies */ | |
50 | ||
51 | if (PRINT_LITERAL_FORM (c)) | |
52 | { | |
53 | if (c == '\\' || c == quoter) | |
54 | { | |
55 | fputs_filtered ("\\", stream); | |
56 | } | |
57 | fprintf_filtered (stream, "%c", c); | |
58 | } | |
59 | else | |
60 | { | |
61 | switch (c) | |
62 | { | |
63 | case '\n': | |
64 | fputs_filtered ("\\n", stream); | |
65 | break; | |
66 | case '\b': | |
67 | fputs_filtered ("\\b", stream); | |
68 | break; | |
69 | case '\t': | |
70 | fputs_filtered ("\\t", stream); | |
71 | break; | |
72 | case '\f': | |
73 | fputs_filtered ("\\f", stream); | |
74 | break; | |
75 | case '\r': | |
76 | fputs_filtered ("\\r", stream); | |
77 | break; | |
78 | case '\033': | |
79 | fputs_filtered ("\\e", stream); | |
80 | break; | |
81 | case '\007': | |
82 | fputs_filtered ("\\a", stream); | |
83 | break; | |
84 | default: | |
85 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
86 | break; | |
87 | } | |
88 | } | |
89 | } | |
90 | ||
91 | /* FIXME: This is a copy of the same function from c-exp.y. It should | |
92 | be replaced with a true Modula version. */ | |
93 | ||
94 | static void | |
95 | m2_printchar (c, stream) | |
96 | int c; | |
97 | GDB_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 (stream, string, length, width, force_ellipses) | |
113 | GDB_FILE *stream; | |
114 | char *string; | |
115 | unsigned int length; | |
116 | int width; | |
117 | int force_ellipses; | |
118 | { | |
119 | register unsigned int i; | |
120 | unsigned int things_printed = 0; | |
121 | int in_quotes = 0; | |
122 | int need_comma = 0; | |
123 | extern int inspect_it; | |
124 | extern int repeat_count_threshold; | |
125 | extern int print_max; | |
126 | ||
127 | if (length == 0) | |
128 | { | |
129 | fputs_filtered ("\"\"", gdb_stdout); | |
130 | return; | |
131 | } | |
132 | ||
133 | for (i = 0; i < length && things_printed < print_max; ++i) | |
134 | { | |
135 | /* Position of the character we are examining | |
136 | to see whether it is repeated. */ | |
137 | unsigned int rep1; | |
138 | /* Number of repetitions we have detected so far. */ | |
139 | unsigned int reps; | |
140 | ||
141 | QUIT; | |
142 | ||
143 | if (need_comma) | |
144 | { | |
145 | fputs_filtered (", ", stream); | |
146 | need_comma = 0; | |
147 | } | |
148 | ||
149 | rep1 = i + 1; | |
150 | reps = 1; | |
151 | while (rep1 < length && string[rep1] == string[i]) | |
152 | { | |
153 | ++rep1; | |
154 | ++reps; | |
155 | } | |
156 | ||
157 | if (reps > repeat_count_threshold) | |
158 | { | |
159 | if (in_quotes) | |
160 | { | |
161 | if (inspect_it) | |
162 | fputs_filtered ("\\\", ", stream); | |
163 | else | |
164 | fputs_filtered ("\", ", stream); | |
165 | in_quotes = 0; | |
166 | } | |
167 | m2_printchar (string[i], stream); | |
168 | fprintf_filtered (stream, " <repeats %u times>", reps); | |
169 | i = rep1 - 1; | |
170 | things_printed += repeat_count_threshold; | |
171 | need_comma = 1; | |
172 | } | |
173 | else | |
174 | { | |
175 | if (!in_quotes) | |
176 | { | |
177 | if (inspect_it) | |
178 | fputs_filtered ("\\\"", stream); | |
179 | else | |
180 | fputs_filtered ("\"", stream); | |
181 | in_quotes = 1; | |
182 | } | |
183 | LA_EMIT_CHAR (string[i], stream, '"'); | |
184 | ++things_printed; | |
185 | } | |
186 | } | |
187 | ||
188 | /* Terminate the quotes if necessary. */ | |
189 | if (in_quotes) | |
190 | { | |
191 | if (inspect_it) | |
192 | fputs_filtered ("\\\"", stream); | |
193 | else | |
194 | fputs_filtered ("\"", stream); | |
195 | } | |
196 | ||
197 | if (force_ellipses || i < length) | |
198 | fputs_filtered ("...", stream); | |
199 | } | |
200 | ||
201 | /* FIXME: This is a copy of c_create_fundamental_type(), before | |
202 | all the non-C types were stripped from it. Needs to be fixed | |
203 | by an experienced Modula programmer. */ | |
204 | ||
205 | static struct type * | |
206 | m2_create_fundamental_type (objfile, typeid) | |
207 | struct objfile *objfile; | |
208 | int typeid; | |
209 | { | |
210 | register struct type *type = NULL; | |
211 | ||
212 | switch (typeid) | |
213 | { | |
214 | default: | |
215 | /* FIXME: For now, if we are asked to produce a type not in this | |
216 | language, create the equivalent of a C integer type with the | |
217 | name "<?type?>". When all the dust settles from the type | |
218 | reconstruction work, this should probably become an error. */ | |
219 | type = init_type (TYPE_CODE_INT, | |
220 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
221 | 0, "<?type?>", objfile); | |
222 | warning ("internal error: no Modula fundamental type %d", typeid); | |
223 | break; | |
224 | case FT_VOID: | |
225 | type = init_type (TYPE_CODE_VOID, | |
226 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
227 | 0, "void", objfile); | |
228 | break; | |
229 | case FT_BOOLEAN: | |
230 | type = init_type (TYPE_CODE_BOOL, | |
231 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
232 | TYPE_FLAG_UNSIGNED, "boolean", objfile); | |
233 | break; | |
234 | case FT_STRING: | |
235 | type = init_type (TYPE_CODE_STRING, | |
236 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
237 | 0, "string", objfile); | |
238 | break; | |
239 | case FT_CHAR: | |
240 | type = init_type (TYPE_CODE_INT, | |
241 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
242 | 0, "char", objfile); | |
243 | break; | |
244 | case FT_SIGNED_CHAR: | |
245 | type = init_type (TYPE_CODE_INT, | |
246 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
247 | 0, "signed char", objfile); | |
248 | break; | |
249 | case FT_UNSIGNED_CHAR: | |
250 | type = init_type (TYPE_CODE_INT, | |
251 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
252 | TYPE_FLAG_UNSIGNED, "unsigned char", objfile); | |
253 | break; | |
254 | case FT_SHORT: | |
255 | type = init_type (TYPE_CODE_INT, | |
256 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
257 | 0, "short", objfile); | |
258 | break; | |
259 | case FT_SIGNED_SHORT: | |
260 | type = init_type (TYPE_CODE_INT, | |
261 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
262 | 0, "short", objfile); /* FIXME-fnf */ | |
263 | break; | |
264 | case FT_UNSIGNED_SHORT: | |
265 | type = init_type (TYPE_CODE_INT, | |
266 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
267 | TYPE_FLAG_UNSIGNED, "unsigned short", objfile); | |
268 | break; | |
269 | case FT_INTEGER: | |
270 | type = init_type (TYPE_CODE_INT, | |
271 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
272 | 0, "int", objfile); | |
273 | break; | |
274 | case FT_SIGNED_INTEGER: | |
275 | type = init_type (TYPE_CODE_INT, | |
276 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
277 | 0, "int", objfile); /* FIXME -fnf */ | |
278 | break; | |
279 | case FT_UNSIGNED_INTEGER: | |
280 | type = init_type (TYPE_CODE_INT, | |
281 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
282 | TYPE_FLAG_UNSIGNED, "unsigned int", objfile); | |
283 | break; | |
284 | case FT_FIXED_DECIMAL: | |
285 | type = init_type (TYPE_CODE_INT, | |
286 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
287 | 0, "fixed decimal", objfile); | |
288 | break; | |
289 | case FT_LONG: | |
290 | type = init_type (TYPE_CODE_INT, | |
291 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
292 | 0, "long", objfile); | |
293 | break; | |
294 | case FT_SIGNED_LONG: | |
295 | type = init_type (TYPE_CODE_INT, | |
296 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
297 | 0, "long", objfile); /* FIXME -fnf */ | |
298 | break; | |
299 | case FT_UNSIGNED_LONG: | |
300 | type = init_type (TYPE_CODE_INT, | |
301 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
302 | TYPE_FLAG_UNSIGNED, "unsigned long", objfile); | |
303 | break; | |
304 | case FT_LONG_LONG: | |
305 | type = init_type (TYPE_CODE_INT, | |
306 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
307 | 0, "long long", objfile); | |
308 | break; | |
309 | case FT_SIGNED_LONG_LONG: | |
310 | type = init_type (TYPE_CODE_INT, | |
311 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
312 | 0, "signed long long", objfile); | |
313 | break; | |
314 | case FT_UNSIGNED_LONG_LONG: | |
315 | type = init_type (TYPE_CODE_INT, | |
316 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
317 | TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); | |
318 | break; | |
319 | case FT_FLOAT: | |
320 | type = init_type (TYPE_CODE_FLT, | |
321 | TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
322 | 0, "float", objfile); | |
323 | break; | |
324 | case FT_DBL_PREC_FLOAT: | |
325 | type = init_type (TYPE_CODE_FLT, | |
326 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
327 | 0, "double", objfile); | |
328 | break; | |
329 | case FT_FLOAT_DECIMAL: | |
330 | type = init_type (TYPE_CODE_FLT, | |
331 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
332 | 0, "floating decimal", objfile); | |
333 | break; | |
334 | case FT_EXT_PREC_FLOAT: | |
335 | type = init_type (TYPE_CODE_FLT, | |
336 | TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, | |
337 | 0, "long double", objfile); | |
338 | break; | |
339 | case FT_COMPLEX: | |
340 | type = init_type (TYPE_CODE_COMPLEX, | |
341 | 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
342 | 0, "complex", objfile); | |
343 | TYPE_TARGET_TYPE (type) | |
344 | = m2_create_fundamental_type (objfile, FT_FLOAT); | |
345 | break; | |
346 | case FT_DBL_PREC_COMPLEX: | |
347 | type = init_type (TYPE_CODE_COMPLEX, | |
348 | 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
349 | 0, "double complex", objfile); | |
350 | TYPE_TARGET_TYPE (type) | |
351 | = m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT); | |
352 | break; | |
353 | case FT_EXT_PREC_COMPLEX: | |
354 | type = init_type (TYPE_CODE_COMPLEX, | |
355 | 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, | |
356 | 0, "long double complex", objfile); | |
357 | TYPE_TARGET_TYPE (type) | |
358 | = m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT); | |
359 | break; | |
360 | } | |
361 | return (type); | |
362 | } | |
363 | ||
364 | \f | |
365 | /* Table of operators and their precedences for printing expressions. */ | |
366 | ||
367 | static const struct op_print m2_op_print_tab[] = { | |
368 | {"+", BINOP_ADD, PREC_ADD, 0}, | |
369 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, | |
370 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
371 | {"-", UNOP_NEG, PREC_PREFIX, 0}, | |
372 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
373 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
374 | {"DIV", BINOP_INTDIV, PREC_MUL, 0}, | |
375 | {"MOD", BINOP_REM, PREC_MUL, 0}, | |
376 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, | |
377 | {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, | |
378 | {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, | |
379 | {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
380 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
381 | {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
382 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
383 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
384 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
385 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
386 | {"^", UNOP_IND, PREC_PREFIX, 0}, | |
387 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, | |
388 | {"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0}, | |
389 | {"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0}, | |
390 | {"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0}, | |
391 | {"FLOAT",UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0}, | |
392 | {"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0}, | |
393 | {"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0}, | |
394 | {"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0}, | |
395 | {"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0}, | |
396 | {"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0}, | |
397 | {NULL, 0, 0, 0} | |
398 | }; | |
399 | \f | |
400 | /* The built-in types of Modula-2. */ | |
401 | ||
402 | struct type *builtin_type_m2_char; | |
403 | struct type *builtin_type_m2_int; | |
404 | struct type *builtin_type_m2_card; | |
405 | struct type *builtin_type_m2_real; | |
406 | struct type *builtin_type_m2_bool; | |
407 | ||
408 | struct type ** CONST_PTR (m2_builtin_types[]) = | |
409 | { | |
410 | &builtin_type_m2_char, | |
411 | &builtin_type_m2_int, | |
412 | &builtin_type_m2_card, | |
413 | &builtin_type_m2_real, | |
414 | &builtin_type_m2_bool, | |
415 | 0 | |
416 | }; | |
417 | ||
418 | const struct language_defn m2_language_defn = { | |
419 | "modula-2", | |
420 | language_m2, | |
421 | m2_builtin_types, | |
422 | range_check_on, | |
423 | type_check_on, | |
424 | m2_parse, /* parser */ | |
425 | m2_error, /* parser error function */ | |
426 | evaluate_subexp_standard, | |
427 | m2_printchar, /* Print character constant */ | |
428 | m2_printstr, /* function to print string constant */ | |
429 | m2_emit_char, /* Function to print a single character */ | |
430 | m2_create_fundamental_type, /* Create fundamental type in this language */ | |
431 | m2_print_type, /* Print a type using appropriate syntax */ | |
432 | m2_val_print, /* Print a value using appropriate syntax */ | |
433 | c_value_print, /* Print a top-level value */ | |
434 | {"", "", "", ""}, /* Binary format info */ | |
435 | {"%loB", "", "o", "B"}, /* Octal format info */ | |
436 | {"%ld", "", "d", ""}, /* Decimal format info */ | |
437 | {"0%lXH", "0", "X", "H"}, /* Hex format info */ | |
438 | m2_op_print_tab, /* expression operators for printing */ | |
439 | 0, /* arrays are first-class (not c-style) */ | |
440 | 0, /* String lower bound */ | |
441 | &builtin_type_m2_char, /* Type of string elements */ | |
442 | LANG_MAGIC | |
443 | }; | |
444 | ||
445 | /* Initialization for Modula-2 */ | |
446 | ||
447 | void | |
448 | _initialize_m2_language () | |
449 | { | |
450 | /* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */ | |
451 | builtin_type_m2_int = | |
452 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, | |
453 | 0, | |
454 | "INTEGER", (struct objfile *) NULL); | |
455 | builtin_type_m2_card = | |
456 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, | |
457 | TYPE_FLAG_UNSIGNED, | |
458 | "CARDINAL", (struct objfile *) NULL); | |
459 | builtin_type_m2_real = | |
460 | init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
461 | 0, | |
462 | "REAL", (struct objfile *) NULL); | |
463 | builtin_type_m2_char = | |
464 | init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
465 | TYPE_FLAG_UNSIGNED, | |
466 | "CHAR", (struct objfile *) NULL); | |
467 | builtin_type_m2_bool = | |
468 | init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT, | |
469 | TYPE_FLAG_UNSIGNED, | |
470 | "BOOLEAN", (struct objfile *) NULL); | |
471 | ||
472 | add_language (&m2_language_defn); | |
473 | } |