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373a8247 PM |
1 | /* Pascal language support routines for GDB, the GNU debugger. |
2 | Copyright 2000 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 | /* This file is derived from p-lang.c */ | |
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 "p-lang.h" | |
29 | #include "valprint.h" | |
30 | ||
31 | extern void _initialize_pascal_language (void); | |
32 | static void pascal_one_char (int, struct ui_file *, int *); | |
33 | ||
34 | /* Print the character C on STREAM as part of the contents of a literal | |
35 | string. | |
36 | In_quotes is reset to 0 if a char is written with #4 notation */ | |
37 | ||
38 | static void | |
39 | pascal_one_char (c, stream, in_quotes) | |
40 | register int c; | |
41 | struct ui_file *stream; | |
42 | int *in_quotes; | |
43 | { | |
44 | ||
45 | c &= 0xFF; /* Avoid sign bit follies */ | |
46 | ||
47 | if ((c == '\'') || (PRINT_LITERAL_FORM (c))) | |
48 | { | |
49 | if (!(*in_quotes)) | |
50 | fputs_filtered ("'", stream); | |
51 | *in_quotes = 1; | |
52 | if (c == '\'') | |
53 | { | |
54 | fputs_filtered ("''", stream); | |
55 | } | |
56 | else | |
57 | fprintf_filtered (stream, "%c", c); | |
58 | } | |
59 | else | |
60 | { | |
61 | if (*in_quotes) | |
62 | fputs_filtered ("'", stream); | |
63 | *in_quotes = 0; | |
64 | fprintf_filtered (stream, "#%d", (unsigned int) c); | |
65 | } | |
66 | } | |
67 | ||
68 | static void pascal_emit_char (int c, struct ui_file *stream, int quoter); | |
69 | ||
70 | /* Print the character C on STREAM as part of the contents of a literal | |
71 | string whose delimiter is QUOTER. Note that that format for printing | |
72 | characters and strings is language specific. */ | |
73 | ||
74 | static void | |
75 | pascal_emit_char (c, stream, quoter) | |
76 | register int c; | |
77 | struct ui_file *stream; | |
78 | int quoter; | |
79 | { | |
80 | int in_quotes = 0; | |
81 | pascal_one_char (c, stream, &in_quotes); | |
82 | if (in_quotes) | |
83 | fputs_filtered ("'", stream); | |
84 | } | |
85 | ||
86 | void | |
87 | pascal_printchar (c, stream) | |
88 | int c; | |
89 | struct ui_file *stream; | |
90 | { | |
91 | int in_quotes = 0; | |
92 | pascal_one_char (c, stream, &in_quotes); | |
93 | if (in_quotes) | |
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 | ||
102 | void | |
103 | pascal_printstr (stream, string, length, width, force_ellipses) | |
104 | struct ui_file *stream; | |
105 | char *string; | |
106 | unsigned int length; | |
107 | int width; | |
108 | int force_ellipses; | |
109 | { | |
110 | register unsigned int i; | |
111 | unsigned int things_printed = 0; | |
112 | int in_quotes = 0; | |
113 | int need_comma = 0; | |
114 | extern int inspect_it; | |
115 | ||
116 | /* If the string was not truncated due to `set print elements', and | |
117 | the last byte of it is a null, we don't print that, in traditional C | |
118 | style. */ | |
119 | if ((!force_ellipses) && length > 0 && string[length - 1] == '\0') | |
120 | length--; | |
121 | ||
122 | if (length == 0) | |
123 | { | |
124 | fputs_filtered ("''", stream); | |
125 | return; | |
126 | } | |
127 | ||
128 | for (i = 0; i < length && things_printed < print_max; ++i) | |
129 | { | |
130 | /* Position of the character we are examining | |
131 | to see whether it is repeated. */ | |
132 | unsigned int rep1; | |
133 | /* Number of repetitions we have detected so far. */ | |
134 | unsigned int reps; | |
135 | ||
136 | QUIT; | |
137 | ||
138 | if (need_comma) | |
139 | { | |
140 | fputs_filtered (", ", stream); | |
141 | need_comma = 0; | |
142 | } | |
143 | ||
144 | rep1 = i + 1; | |
145 | reps = 1; | |
146 | while (rep1 < length && string[rep1] == string[i]) | |
147 | { | |
148 | ++rep1; | |
149 | ++reps; | |
150 | } | |
151 | ||
152 | if (reps > repeat_count_threshold) | |
153 | { | |
154 | if (in_quotes) | |
155 | { | |
156 | if (inspect_it) | |
157 | fputs_filtered ("\\', ", stream); | |
158 | else | |
159 | fputs_filtered ("', ", stream); | |
160 | in_quotes = 0; | |
161 | } | |
162 | pascal_printchar (string[i], stream); | |
163 | fprintf_filtered (stream, " <repeats %u times>", reps); | |
164 | i = rep1 - 1; | |
165 | things_printed += repeat_count_threshold; | |
166 | need_comma = 1; | |
167 | } | |
168 | else | |
169 | { | |
170 | int c = string[i]; | |
171 | if ((!in_quotes) && (PRINT_LITERAL_FORM (c))) | |
172 | { | |
173 | if (inspect_it) | |
174 | fputs_filtered ("\\'", stream); | |
175 | else | |
176 | fputs_filtered ("'", stream); | |
177 | in_quotes = 1; | |
178 | } | |
179 | pascal_one_char (c, stream, &in_quotes); | |
180 | ++things_printed; | |
181 | } | |
182 | } | |
183 | ||
184 | /* Terminate the quotes if necessary. */ | |
185 | if (in_quotes) | |
186 | { | |
187 | if (inspect_it) | |
188 | fputs_filtered ("\\'", stream); | |
189 | else | |
190 | fputs_filtered ("'", stream); | |
191 | } | |
192 | ||
193 | if (force_ellipses || i < length) | |
194 | fputs_filtered ("...", stream); | |
195 | } | |
196 | ||
197 | /* Create a fundamental Pascal type using default reasonable for the current | |
198 | target machine. | |
199 | ||
200 | Some object/debugging file formats (DWARF version 1, COFF, etc) do not | |
201 | define fundamental types such as "int" or "double". Others (stabs or | |
202 | DWARF version 2, etc) do define fundamental types. For the formats which | |
203 | don't provide fundamental types, gdb can create such types using this | |
204 | function. | |
205 | ||
206 | FIXME: Some compilers distinguish explicitly signed integral types | |
207 | (signed short, signed int, signed long) from "regular" integral types | |
208 | (short, int, long) in the debugging information. There is some dis- | |
209 | agreement as to how useful this feature is. In particular, gcc does | |
210 | not support this. Also, only some debugging formats allow the | |
211 | distinction to be passed on to a debugger. For now, we always just | |
212 | use "short", "int", or "long" as the type name, for both the implicit | |
213 | and explicitly signed types. This also makes life easier for the | |
214 | gdb test suite since we don't have to account for the differences | |
215 | in output depending upon what the compiler and debugging format | |
216 | support. We will probably have to re-examine the issue when gdb | |
217 | starts taking it's fundamental type information directly from the | |
218 | debugging information supplied by the compiler. fnf@cygnus.com */ | |
219 | ||
220 | /* Note there might be some discussion about the choosen correspondance | |
221 | because it mainly reflects Free Pascal Compiler setup for now PM */ | |
222 | ||
223 | ||
224 | struct type * | |
225 | pascal_create_fundamental_type (objfile, typeid) | |
226 | struct objfile *objfile; | |
227 | int typeid; | |
228 | { | |
229 | register struct type *type = NULL; | |
230 | ||
231 | switch (typeid) | |
232 | { | |
233 | default: | |
234 | /* FIXME: For now, if we are asked to produce a type not in this | |
235 | language, create the equivalent of a C integer type with the | |
236 | name "<?type?>". When all the dust settles from the type | |
237 | reconstruction work, this should probably become an error. */ | |
238 | type = init_type (TYPE_CODE_INT, | |
239 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
240 | 0, "<?type?>", objfile); | |
241 | warning ("internal error: no Pascal fundamental type %d", typeid); | |
242 | break; | |
243 | case FT_VOID: | |
244 | type = init_type (TYPE_CODE_VOID, | |
245 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
246 | 0, "void", objfile); | |
247 | break; | |
248 | case FT_CHAR: | |
249 | type = init_type (TYPE_CODE_INT, | |
250 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
251 | 0, "char", objfile); | |
252 | break; | |
253 | case FT_SIGNED_CHAR: | |
254 | type = init_type (TYPE_CODE_INT, | |
255 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
256 | 0, "shortint", objfile); | |
257 | break; | |
258 | case FT_UNSIGNED_CHAR: | |
259 | type = init_type (TYPE_CODE_INT, | |
260 | TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
261 | TYPE_FLAG_UNSIGNED, "byte", objfile); | |
262 | break; | |
263 | case FT_SHORT: | |
264 | type = init_type (TYPE_CODE_INT, | |
265 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
266 | 0, "integer", objfile); | |
267 | break; | |
268 | case FT_SIGNED_SHORT: | |
269 | type = init_type (TYPE_CODE_INT, | |
270 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
271 | 0, "integer", objfile); /* FIXME-fnf */ | |
272 | break; | |
273 | case FT_UNSIGNED_SHORT: | |
274 | type = init_type (TYPE_CODE_INT, | |
275 | TARGET_SHORT_BIT / TARGET_CHAR_BIT, | |
276 | TYPE_FLAG_UNSIGNED, "word", objfile); | |
277 | break; | |
278 | case FT_INTEGER: | |
279 | type = init_type (TYPE_CODE_INT, | |
280 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
281 | 0, "longint", objfile); | |
282 | break; | |
283 | case FT_SIGNED_INTEGER: | |
284 | type = init_type (TYPE_CODE_INT, | |
285 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
286 | 0, "longint", objfile); /* FIXME -fnf */ | |
287 | break; | |
288 | case FT_UNSIGNED_INTEGER: | |
289 | type = init_type (TYPE_CODE_INT, | |
290 | TARGET_INT_BIT / TARGET_CHAR_BIT, | |
291 | TYPE_FLAG_UNSIGNED, "cardinal", objfile); | |
292 | break; | |
293 | case FT_LONG: | |
294 | type = init_type (TYPE_CODE_INT, | |
295 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
296 | 0, "long", objfile); | |
297 | break; | |
298 | case FT_SIGNED_LONG: | |
299 | type = init_type (TYPE_CODE_INT, | |
300 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
301 | 0, "long", objfile); /* FIXME -fnf */ | |
302 | break; | |
303 | case FT_UNSIGNED_LONG: | |
304 | type = init_type (TYPE_CODE_INT, | |
305 | TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
306 | TYPE_FLAG_UNSIGNED, "unsigned long", objfile); | |
307 | break; | |
308 | case FT_LONG_LONG: | |
309 | type = init_type (TYPE_CODE_INT, | |
310 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
311 | 0, "long long", objfile); | |
312 | break; | |
313 | case FT_SIGNED_LONG_LONG: | |
314 | type = init_type (TYPE_CODE_INT, | |
315 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
316 | 0, "signed long long", objfile); | |
317 | break; | |
318 | case FT_UNSIGNED_LONG_LONG: | |
319 | type = init_type (TYPE_CODE_INT, | |
320 | TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, | |
321 | TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); | |
322 | break; | |
323 | case FT_FLOAT: | |
324 | type = init_type (TYPE_CODE_FLT, | |
325 | TARGET_FLOAT_BIT / TARGET_CHAR_BIT, | |
326 | 0, "float", objfile); | |
327 | break; | |
328 | case FT_DBL_PREC_FLOAT: | |
329 | type = init_type (TYPE_CODE_FLT, | |
330 | TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
331 | 0, "double", 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, "extended", objfile); | |
337 | break; | |
338 | } | |
339 | return (type); | |
340 | } | |
341 | \f | |
342 | ||
343 | /* Table mapping opcodes into strings for printing operators | |
344 | and precedences of the operators. */ | |
345 | ||
346 | const struct op_print pascal_op_print_tab[] = | |
347 | { | |
348 | {",", BINOP_COMMA, PREC_COMMA, 0}, | |
349 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, | |
350 | {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, | |
351 | {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, | |
352 | {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, | |
353 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
354 | {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
355 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
356 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
357 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
358 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
359 | {"shr", BINOP_RSH, PREC_SHIFT, 0}, | |
360 | {"shl", BINOP_LSH, PREC_SHIFT, 0}, | |
361 | {"+", BINOP_ADD, PREC_ADD, 0}, | |
362 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
363 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
364 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
365 | {"div", BINOP_INTDIV, PREC_MUL, 0}, | |
366 | {"mod", BINOP_REM, PREC_MUL, 0}, | |
367 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, | |
368 | {"-", UNOP_NEG, PREC_PREFIX, 0}, | |
369 | {"not", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
370 | {"^", UNOP_IND, PREC_SUFFIX, 1}, | |
371 | {"@", UNOP_ADDR, PREC_PREFIX, 0}, | |
372 | {"sizeof", UNOP_SIZEOF, PREC_PREFIX, 0}, | |
373 | {NULL, 0, 0, 0} | |
374 | }; | |
375 | \f | |
376 | struct type **const /* CONST_PTR v 4.17 */ (pascal_builtin_types[]) = | |
377 | { | |
378 | &builtin_type_int, | |
379 | &builtin_type_long, | |
380 | &builtin_type_short, | |
381 | &builtin_type_char, | |
382 | &builtin_type_float, | |
383 | &builtin_type_double, | |
384 | &builtin_type_void, | |
385 | &builtin_type_long_long, | |
386 | &builtin_type_signed_char, | |
387 | &builtin_type_unsigned_char, | |
388 | &builtin_type_unsigned_short, | |
389 | &builtin_type_unsigned_int, | |
390 | &builtin_type_unsigned_long, | |
391 | &builtin_type_unsigned_long_long, | |
392 | &builtin_type_long_double, | |
393 | &builtin_type_complex, | |
394 | &builtin_type_double_complex, | |
395 | 0 | |
396 | }; | |
397 | ||
398 | const struct language_defn pascal_language_defn = | |
399 | { | |
400 | "pascal", /* Language name */ | |
401 | language_pascal, | |
402 | pascal_builtin_types, | |
403 | range_check_on, | |
404 | type_check_on, | |
405 | pascal_parse, | |
406 | pascal_error, | |
407 | evaluate_subexp_standard, | |
408 | pascal_printchar, /* Print a character constant */ | |
409 | pascal_printstr, /* Function to print string constant */ | |
410 | pascal_emit_char, /* Print a single char */ | |
411 | pascal_create_fundamental_type, /* Create fundamental type in this language */ | |
412 | pascal_print_type, /* Print a type using appropriate syntax */ | |
413 | pascal_val_print, /* Print a value using appropriate syntax */ | |
414 | pascal_value_print, /* Print a top-level value */ | |
415 | {"", "%", "b", ""}, /* Binary format info */ | |
416 | {"0%lo", "0", "o", ""}, /* Octal format info */ | |
417 | {"%ld", "", "d", ""}, /* Decimal format info */ | |
418 | {"$%lx", "$", "x", ""}, /* Hex format info */ | |
419 | pascal_op_print_tab, /* expression operators for printing */ | |
420 | 1, /* c-style arrays */ | |
421 | 0, /* String lower bound */ | |
422 | &builtin_type_char, /* Type of string elements */ | |
423 | LANG_MAGIC | |
424 | }; | |
425 | ||
426 | void | |
427 | _initialize_pascal_language () | |
428 | { | |
429 | add_language (&pascal_language_defn); | |
430 | } |