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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 | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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 | ||
28 | /* Print the character C on STREAM as part of the contents of a literal | |
29 | string whose delimiter is QUOTER. Note that that format for printing | |
30 | characters and strings is language specific. | |
31 | FIXME: This is a copy of the same function from c-exp.y. It should | |
32 | be replaced with a true Modula version. | |
33 | */ | |
34 | ||
35 | static void | |
36 | emit_char (c, stream, quoter) | |
37 | register int c; | |
38 | FILE *stream; | |
39 | int quoter; | |
40 | { | |
41 | ||
42 | c &= 0xFF; /* Avoid sign bit follies */ | |
43 | ||
44 | if (PRINT_LITERAL_FORM (c)) | |
45 | { | |
46 | if (c == '\\' || c == quoter) | |
47 | { | |
48 | fputs_filtered ("\\", stream); | |
49 | } | |
50 | fprintf_filtered (stream, "%c", c); | |
51 | } | |
52 | else | |
53 | { | |
54 | switch (c) | |
55 | { | |
56 | case '\n': | |
57 | fputs_filtered ("\\n", stream); | |
58 | break; | |
59 | case '\b': | |
60 | fputs_filtered ("\\b", stream); | |
61 | break; | |
62 | case '\t': | |
63 | fputs_filtered ("\\t", stream); | |
64 | break; | |
65 | case '\f': | |
66 | fputs_filtered ("\\f", stream); | |
67 | break; | |
68 | case '\r': | |
69 | fputs_filtered ("\\r", stream); | |
70 | break; | |
71 | case '\033': | |
72 | fputs_filtered ("\\e", stream); | |
73 | break; | |
74 | case '\007': | |
75 | fputs_filtered ("\\a", stream); | |
76 | break; | |
77 | default: | |
78 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
79 | break; | |
80 | } | |
81 | } | |
82 | } | |
83 | ||
84 | /* FIXME: This is a copy of the same function from c-exp.y. It should | |
85 | be replaced with a true Modula version. */ | |
86 | ||
87 | static void | |
88 | m2_printchar (c, stream) | |
89 | int c; | |
90 | FILE *stream; | |
91 | { | |
92 | fputs_filtered ("'", stream); | |
93 | emit_char (c, stream, '\''); | |
94 | fputs_filtered ("'", stream); | |
95 | } | |
96 | ||
97 | /* Print the character string STRING, printing at most LENGTH characters. | |
98 | Printing stops early if the number hits print_max; repeat counts | |
99 | are printed as appropriate. Print ellipses at the end if we | |
100 | had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. | |
101 | FIXME: This is a copy of the same function from c-exp.y. It should | |
102 | be replaced with a true Modula version. */ | |
103 | ||
104 | static void | |
105 | m2_printstr (stream, string, length, force_ellipses) | |
106 | FILE *stream; | |
107 | char *string; | |
108 | unsigned int length; | |
109 | int force_ellipses; | |
110 | { | |
111 | register unsigned int i; | |
112 | unsigned int things_printed = 0; | |
113 | int in_quotes = 0; | |
114 | int need_comma = 0; | |
115 | extern int inspect_it; | |
116 | extern int repeat_count_threshold; | |
117 | extern int print_max; | |
118 | ||
119 | if (length == 0) | |
120 | { | |
121 | fputs_filtered ("\"\"", stdout); | |
122 | return; | |
123 | } | |
124 | ||
125 | for (i = 0; i < length && things_printed < print_max; ++i) | |
126 | { | |
127 | /* Position of the character we are examining | |
128 | to see whether it is repeated. */ | |
129 | unsigned int rep1; | |
130 | /* Number of repetitions we have detected so far. */ | |
131 | unsigned int reps; | |
132 | ||
133 | QUIT; | |
134 | ||
135 | if (need_comma) | |
136 | { | |
137 | fputs_filtered (", ", stream); | |
138 | need_comma = 0; | |
139 | } | |
140 | ||
141 | rep1 = i + 1; | |
142 | reps = 1; | |
143 | while (rep1 < length && string[rep1] == string[i]) | |
144 | { | |
145 | ++rep1; | |
146 | ++reps; | |
147 | } | |
148 | ||
149 | if (reps > repeat_count_threshold) | |
150 | { | |
151 | if (in_quotes) | |
152 | { | |
153 | if (inspect_it) | |
154 | fputs_filtered ("\\\", ", stream); | |
155 | else | |
156 | fputs_filtered ("\", ", stream); | |
157 | in_quotes = 0; | |
158 | } | |
159 | m2_printchar (string[i], stream); | |
160 | fprintf_filtered (stream, " <repeats %u times>", reps); | |
161 | i = rep1 - 1; | |
162 | things_printed += repeat_count_threshold; | |
163 | need_comma = 1; | |
164 | } | |
165 | else | |
166 | { | |
167 | if (!in_quotes) | |
168 | { | |
169 | if (inspect_it) | |
170 | fputs_filtered ("\\\"", stream); | |
171 | else | |
172 | fputs_filtered ("\"", stream); | |
173 | in_quotes = 1; | |
174 | } | |
175 | emit_char (string[i], stream, '"'); | |
176 | ++things_printed; | |
177 | } | |
178 | } | |
179 | ||
180 | /* Terminate the quotes if necessary. */ | |
181 | if (in_quotes) | |
182 | { | |
183 | if (inspect_it) | |
184 | fputs_filtered ("\\\"", stream); | |
185 | else | |
186 | fputs_filtered ("\"", stream); | |
187 | } | |
188 | ||
189 | if (force_ellipses || i < length) | |
190 | fputs_filtered ("...", stream); | |
191 | } | |
192 | ||
193 | /* FIXME: This is a copy of c_create_fundamental_type(), before | |
194 | all the non-C types were stripped from it. Needs to be fixed | |
195 | by an experienced Modula programmer. */ | |
196 | ||
197 | static struct type * | |
198 | m2_create_fundamental_type (objfile, typeid) | |
199 | struct objfile *objfile; | |
200 | int typeid; | |
201 | { | |
202 | register struct type *type = NULL; | |
203 | register int nbytes; | |
204 | ||
205 | switch (typeid) | |
206 | { | |
207 | default: | |
208 | /* FIXME: For now, if we are asked to produce a type not in this | |
209 | language, create the equivalent of a C integer type with the | |
210 | name "<?type?>". When all the dust settles from the type | |
211 | reconstruction work, this should probably become an error. */ | |
212 | type = init_type (TYPE_CODE_INT, | |
213 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
214 | 0, "<?type?>", objfile); | |
215 | warning ("internal error: no Modula fundamental type %d", typeid); | |
216 | break; | |
217 | case FT_VOID: | |
218 | type = init_type (TYPE_CODE_VOID, | |
219 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
220 | 0, "void", objfile); | |
221 | break; | |
222 | case FT_BOOLEAN: | |
223 | type = init_type (TYPE_CODE_BOOL, | |
224 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
225 | TYPE_FLAG_UNSIGNED, "boolean", objfile); | |
226 | break; | |
227 | case FT_STRING: | |
228 | type = init_type (TYPE_CODE_PASCAL_ARRAY, | |
229 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
230 | 0, "string", objfile); | |
231 | break; | |
232 | case FT_CHAR: | |
233 | type = init_type (TYPE_CODE_INT, | |
234 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
235 | 0, "char", objfile); | |
236 | break; | |
237 | case FT_SIGNED_CHAR: | |
238 | type = init_type (TYPE_CODE_INT, | |
239 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
240 | TYPE_FLAG_SIGNED, "signed char", objfile); | |
241 | break; | |
242 | case FT_UNSIGNED_CHAR: | |
243 | type = init_type (TYPE_CODE_INT, | |
244 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
245 | TYPE_FLAG_UNSIGNED, "unsigned char", objfile); | |
246 | break; | |
247 | case FT_SHORT: | |
248 | type = init_type (TYPE_CODE_INT, | |
249 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
250 | 0, "short", objfile); | |
251 | break; | |
252 | case FT_SIGNED_SHORT: | |
253 | type = init_type (TYPE_CODE_INT, | |
254 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
255 | TYPE_FLAG_SIGNED, "short", objfile); /* FIXME-fnf */ | |
256 | break; | |
257 | case FT_UNSIGNED_SHORT: | |
258 | type = init_type (TYPE_CODE_INT, | |
259 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
260 | TYPE_FLAG_UNSIGNED, "unsigned short", objfile); | |
261 | break; | |
262 | case FT_INTEGER: | |
263 | type = init_type (TYPE_CODE_INT, | |
264 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
265 | 0, "int", objfile); | |
266 | break; | |
267 | case FT_SIGNED_INTEGER: | |
268 | type = init_type (TYPE_CODE_INT, | |
269 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
270 | TYPE_FLAG_SIGNED, "int", objfile); /* FIXME -fnf */ | |
271 | break; | |
272 | case FT_UNSIGNED_INTEGER: | |
273 | type = init_type (TYPE_CODE_INT, | |
274 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
275 | TYPE_FLAG_UNSIGNED, "unsigned int", objfile); | |
276 | break; | |
277 | case FT_FIXED_DECIMAL: | |
278 | type = init_type (TYPE_CODE_INT, | |
279 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
280 | 0, "fixed decimal", objfile); | |
281 | break; | |
282 | case FT_LONG: | |
283 | type = init_type (TYPE_CODE_INT, | |
284 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
285 | 0, "long", objfile); | |
286 | break; | |
287 | case FT_SIGNED_LONG: | |
288 | type = init_type (TYPE_CODE_INT, | |
289 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
290 | TYPE_FLAG_SIGNED, "long", objfile); /* FIXME -fnf */ | |
291 | break; | |
292 | case FT_UNSIGNED_LONG: | |
293 | type = init_type (TYPE_CODE_INT, | |
294 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
295 | TYPE_FLAG_UNSIGNED, "unsigned long", objfile); | |
296 | break; | |
297 | case FT_LONG_LONG: | |
298 | type = init_type (TYPE_CODE_INT, | |
299 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
300 | 0, "long long", objfile); | |
301 | break; | |
302 | case FT_SIGNED_LONG_LONG: | |
303 | type = init_type (TYPE_CODE_INT, | |
304 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
305 | TYPE_FLAG_SIGNED, "signed long long", objfile); | |
306 | break; | |
307 | case FT_UNSIGNED_LONG_LONG: | |
308 | type = init_type (TYPE_CODE_INT, | |
309 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
310 | TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); | |
311 | break; | |
312 | case FT_FLOAT: | |
313 | type = init_type (TYPE_CODE_FLT, | |
314 | TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
315 | 0, "float", objfile); | |
316 | break; | |
317 | case FT_DBL_PREC_FLOAT: | |
318 | type = init_type (TYPE_CODE_FLT, | |
319 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
320 | 0, "double", objfile); | |
321 | break; | |
322 | case FT_FLOAT_DECIMAL: | |
323 | type = init_type (TYPE_CODE_FLT, | |
324 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
325 | 0, "floating decimal", objfile); | |
326 | break; | |
327 | case FT_EXT_PREC_FLOAT: | |
328 | type = init_type (TYPE_CODE_FLT, | |
329 | TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, | |
330 | 0, "long double", objfile); | |
331 | break; | |
332 | case FT_COMPLEX: | |
333 | type = init_type (TYPE_CODE_FLT, | |
334 | TARGET_COMPLEX_BIT / TARGET_CHAR_BIT, | |
335 | 0, "complex", objfile); | |
336 | break; | |
337 | case FT_DBL_PREC_COMPLEX: | |
338 | type = init_type (TYPE_CODE_FLT, | |
339 | TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT, | |
340 | 0, "double complex", objfile); | |
341 | break; | |
342 | case FT_EXT_PREC_COMPLEX: | |
343 | type = init_type (TYPE_CODE_FLT, | |
344 | TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT, | |
345 | 0, "long double complex", objfile); | |
346 | break; | |
347 | } | |
348 | return (type); | |
349 | } | |
350 | ||
351 | \f | |
352 | /* Table of operators and their precedences for printing expressions. */ | |
353 | ||
354 | const static struct op_print m2_op_print_tab[] = { | |
355 | {"+", BINOP_ADD, PREC_ADD, 0}, | |
356 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, | |
357 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
358 | {"-", UNOP_NEG, PREC_PREFIX, 0}, | |
359 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
360 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
361 | {"DIV", BINOP_INTDIV, PREC_MUL, 0}, | |
362 | {"MOD", BINOP_REM, PREC_MUL, 0}, | |
363 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, | |
364 | {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, | |
365 | {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, | |
366 | {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
367 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
368 | {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
369 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
370 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
371 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
372 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
373 | {"^", UNOP_IND, PREC_PREFIX, 0}, | |
374 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, | |
375 | {NULL, 0, 0, 0} | |
376 | }; | |
377 | \f | |
378 | /* The built-in types of Modula-2. */ | |
379 | ||
380 | struct type *builtin_type_m2_char; | |
381 | struct type *builtin_type_m2_int; | |
382 | struct type *builtin_type_m2_card; | |
383 | struct type *builtin_type_m2_real; | |
384 | struct type *builtin_type_m2_bool; | |
385 | ||
386 | struct type ** const (m2_builtin_types[]) = | |
387 | { | |
388 | &builtin_type_m2_char, | |
389 | &builtin_type_m2_int, | |
390 | &builtin_type_m2_card, | |
391 | &builtin_type_m2_real, | |
392 | &builtin_type_m2_bool, | |
393 | 0 | |
394 | }; | |
395 | ||
396 | const struct language_defn m2_language_defn = { | |
397 | "modula-2", | |
398 | language_m2, | |
399 | m2_builtin_types, | |
400 | range_check_on, | |
401 | type_check_on, | |
402 | m2_parse, /* parser */ | |
403 | m2_error, /* parser error function */ | |
404 | m2_printchar, /* Print character constant */ | |
405 | m2_printstr, /* function to print string constant */ | |
406 | m2_create_fundamental_type, /* Create fundamental type in this language */ | |
407 | &builtin_type_m2_int, /* longest signed integral type */ | |
408 | &builtin_type_m2_card, /* longest unsigned integral type */ | |
409 | &builtin_type_m2_real, /* longest floating point type */ | |
410 | {"", "", "", ""}, /* Binary format info */ | |
411 | {"%oB", "", "o", "B"}, /* Octal format info */ | |
412 | {"%d", "", "d", ""}, /* Decimal format info */ | |
413 | {"0%XH", "0", "X", "H"}, /* Hex format info */ | |
414 | m2_op_print_tab, /* expression operators for printing */ | |
415 | LANG_MAGIC | |
416 | }; | |
417 | ||
418 | /* Initialization for Modula-2 */ | |
419 | ||
420 | void | |
d62e7a20 | 421 | _initialize_m2_language () |
22e39759 FF |
422 | { |
423 | /* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */ | |
424 | builtin_type_m2_int = | |
425 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, | |
426 | 0, | |
427 | "INTEGER", (struct objfile *) NULL); | |
428 | builtin_type_m2_card = | |
429 | init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, | |
430 | TYPE_FLAG_UNSIGNED, | |
431 | "CARDINAL", (struct objfile *) NULL); | |
432 | builtin_type_m2_real = | |
433 | init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
434 | 0, | |
435 | "REAL", (struct objfile *) NULL); | |
436 | builtin_type_m2_char = | |
437 | init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
438 | TYPE_FLAG_UNSIGNED, | |
439 | "CHAR", (struct objfile *) NULL); | |
440 | builtin_type_m2_bool = | |
441 | init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT, | |
442 | TYPE_FLAG_UNSIGNED, | |
443 | "BOOLEAN", (struct objfile *) NULL); | |
444 | ||
445 | TYPE_NFIELDS(builtin_type_m2_bool) = 2; | |
446 | TYPE_FIELDS(builtin_type_m2_bool) = | |
d62e7a20 | 447 | (struct field *) xmalloc (sizeof (struct field) * 2); |
22e39759 | 448 | TYPE_FIELD_BITPOS(builtin_type_m2_bool,0) = 0; |
d62e7a20 | 449 | TYPE_FIELD_NAME(builtin_type_m2_bool,0) = (char *)xmalloc(6); |
22e39759 FF |
450 | strcpy(TYPE_FIELD_NAME(builtin_type_m2_bool,0),"FALSE"); |
451 | TYPE_FIELD_BITPOS(builtin_type_m2_bool,1) = 1; | |
d62e7a20 | 452 | TYPE_FIELD_NAME(builtin_type_m2_bool,1) = (char *)xmalloc(5); |
22e39759 FF |
453 | strcpy(TYPE_FIELD_NAME(builtin_type_m2_bool,1),"TRUE"); |
454 | ||
455 | add_language (&m2_language_defn); | |
456 | } |