1 /* Modula 2 language support routines for GDB, the GNU debugger.
3 Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2002, 2003,
4 2004, 2005 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
26 #include "expression.h"
27 #include "parser-defs.h"
33 extern void _initialize_m2_language (void);
34 static struct type *m2_create_fundamental_type (struct objfile *, int);
35 static void m2_printchar (int, struct ui_file *);
36 static void m2_emit_char (int, struct ui_file *, int);
38 /* Print the character C on STREAM as part of the contents of a literal
39 string whose delimiter is QUOTER. Note that that format for printing
40 characters and strings is language specific.
41 FIXME: This is a copy of the same function from c-exp.y. It should
42 be replaced with a true Modula version.
46 m2_emit_char (int c, struct ui_file *stream, int quoter)
49 c &= 0xFF; /* Avoid sign bit follies */
51 if (PRINT_LITERAL_FORM (c))
53 if (c == '\\' || c == quoter)
55 fputs_filtered ("\\", stream);
57 fprintf_filtered (stream, "%c", c);
64 fputs_filtered ("\\n", stream);
67 fputs_filtered ("\\b", stream);
70 fputs_filtered ("\\t", stream);
73 fputs_filtered ("\\f", stream);
76 fputs_filtered ("\\r", stream);
79 fputs_filtered ("\\e", stream);
82 fputs_filtered ("\\a", stream);
85 fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
91 /* FIXME: This is a copy of the same function from c-exp.y. It should
92 be replaced with a true Modula version. */
95 m2_printchar (int c, struct ui_file *stream)
97 fputs_filtered ("'", stream);
98 LA_EMIT_CHAR (c, stream, '\'');
99 fputs_filtered ("'", stream);
102 /* Print the character string STRING, printing at most LENGTH characters.
103 Printing stops early if the number hits print_max; repeat counts
104 are printed as appropriate. Print ellipses at the end if we
105 had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
106 FIXME: This is a copy of the same function from c-exp.y. It should
107 be replaced with a true Modula version. */
110 m2_printstr (struct ui_file *stream, const gdb_byte *string,
111 unsigned int length, int width, int force_ellipses)
114 unsigned int things_printed = 0;
120 fputs_filtered ("\"\"", gdb_stdout);
124 for (i = 0; i < length && things_printed < print_max; ++i)
126 /* Position of the character we are examining
127 to see whether it is repeated. */
129 /* Number of repetitions we have detected so far. */
136 fputs_filtered (", ", stream);
142 while (rep1 < length && string[rep1] == string[i])
148 if (reps > repeat_count_threshold)
153 fputs_filtered ("\\\", ", stream);
155 fputs_filtered ("\", ", stream);
158 m2_printchar (string[i], stream);
159 fprintf_filtered (stream, " <repeats %u times>", reps);
161 things_printed += repeat_count_threshold;
169 fputs_filtered ("\\\"", stream);
171 fputs_filtered ("\"", stream);
174 LA_EMIT_CHAR (string[i], stream, '"');
179 /* Terminate the quotes if necessary. */
183 fputs_filtered ("\\\"", stream);
185 fputs_filtered ("\"", stream);
188 if (force_ellipses || i < length)
189 fputs_filtered ("...", stream);
192 /* FIXME: This is a copy of c_create_fundamental_type(), before
193 all the non-C types were stripped from it. Needs to be fixed
194 by an experienced Modula programmer. */
197 m2_create_fundamental_type (struct objfile *objfile, int typeid)
199 struct type *type = NULL;
204 /* FIXME: For now, if we are asked to produce a type not in this
205 language, create the equivalent of a C integer type with the
206 name "<?type?>". When all the dust settles from the type
207 reconstruction work, this should probably become an error. */
208 type = init_type (TYPE_CODE_INT,
209 TARGET_INT_BIT / TARGET_CHAR_BIT,
210 0, "<?type?>", objfile);
211 warning (_("internal error: no Modula fundamental type %d"), typeid);
214 type = init_type (TYPE_CODE_VOID,
215 TARGET_CHAR_BIT / TARGET_CHAR_BIT,
219 type = init_type (TYPE_CODE_BOOL,
220 TARGET_CHAR_BIT / TARGET_CHAR_BIT,
221 TYPE_FLAG_UNSIGNED, "boolean", objfile);
224 type = init_type (TYPE_CODE_STRING,
225 TARGET_CHAR_BIT / TARGET_CHAR_BIT,
226 0, "string", objfile);
229 type = init_type (TYPE_CODE_INT,
230 TARGET_CHAR_BIT / TARGET_CHAR_BIT,
234 type = init_type (TYPE_CODE_INT,
235 TARGET_CHAR_BIT / TARGET_CHAR_BIT,
236 0, "signed char", objfile);
238 case FT_UNSIGNED_CHAR:
239 type = init_type (TYPE_CODE_INT,
240 TARGET_CHAR_BIT / TARGET_CHAR_BIT,
241 TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
244 type = init_type (TYPE_CODE_INT,
245 TARGET_SHORT_BIT / TARGET_CHAR_BIT,
246 0, "short", objfile);
248 case FT_SIGNED_SHORT:
249 type = init_type (TYPE_CODE_INT,
250 TARGET_SHORT_BIT / TARGET_CHAR_BIT,
251 0, "short", objfile); /* FIXME-fnf */
253 case FT_UNSIGNED_SHORT:
254 type = init_type (TYPE_CODE_INT,
255 TARGET_SHORT_BIT / TARGET_CHAR_BIT,
256 TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
259 type = init_type (TYPE_CODE_INT,
260 TARGET_INT_BIT / TARGET_CHAR_BIT,
263 case FT_SIGNED_INTEGER:
264 type = init_type (TYPE_CODE_INT,
265 TARGET_INT_BIT / TARGET_CHAR_BIT,
266 0, "int", objfile); /* FIXME -fnf */
268 case FT_UNSIGNED_INTEGER:
269 type = init_type (TYPE_CODE_INT,
270 TARGET_INT_BIT / TARGET_CHAR_BIT,
271 TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
273 case FT_FIXED_DECIMAL:
274 type = init_type (TYPE_CODE_INT,
275 TARGET_INT_BIT / TARGET_CHAR_BIT,
276 0, "fixed decimal", objfile);
279 type = init_type (TYPE_CODE_INT,
280 TARGET_LONG_BIT / TARGET_CHAR_BIT,
284 type = init_type (TYPE_CODE_INT,
285 TARGET_LONG_BIT / TARGET_CHAR_BIT,
286 0, "long", objfile); /* FIXME -fnf */
288 case FT_UNSIGNED_LONG:
289 type = init_type (TYPE_CODE_INT,
290 TARGET_LONG_BIT / TARGET_CHAR_BIT,
291 TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
294 type = init_type (TYPE_CODE_INT,
295 TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
296 0, "long long", objfile);
298 case FT_SIGNED_LONG_LONG:
299 type = init_type (TYPE_CODE_INT,
300 TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
301 0, "signed long long", objfile);
303 case FT_UNSIGNED_LONG_LONG:
304 type = init_type (TYPE_CODE_INT,
305 TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
306 TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
309 type = init_type (TYPE_CODE_FLT,
310 TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
311 0, "float", objfile);
313 case FT_DBL_PREC_FLOAT:
314 type = init_type (TYPE_CODE_FLT,
315 TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
316 0, "double", objfile);
318 case FT_FLOAT_DECIMAL:
319 type = init_type (TYPE_CODE_FLT,
320 TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
321 0, "floating decimal", objfile);
323 case FT_EXT_PREC_FLOAT:
324 type = init_type (TYPE_CODE_FLT,
325 TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
326 0, "long double", objfile);
329 type = init_type (TYPE_CODE_COMPLEX,
330 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
331 0, "complex", objfile);
332 TYPE_TARGET_TYPE (type)
333 = m2_create_fundamental_type (objfile, FT_FLOAT);
335 case FT_DBL_PREC_COMPLEX:
336 type = init_type (TYPE_CODE_COMPLEX,
337 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
338 0, "double complex", objfile);
339 TYPE_TARGET_TYPE (type)
340 = m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
342 case FT_EXT_PREC_COMPLEX:
343 type = init_type (TYPE_CODE_COMPLEX,
344 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
345 0, "long double complex", objfile);
346 TYPE_TARGET_TYPE (type)
347 = m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT);
354 /* Table of operators and their precedences for printing expressions. */
356 static const struct op_print m2_op_print_tab[] =
358 {"+", BINOP_ADD, PREC_ADD, 0},
359 {"+", UNOP_PLUS, PREC_PREFIX, 0},
360 {"-", BINOP_SUB, PREC_ADD, 0},
361 {"-", UNOP_NEG, PREC_PREFIX, 0},
362 {"*", BINOP_MUL, PREC_MUL, 0},
363 {"/", BINOP_DIV, PREC_MUL, 0},
364 {"DIV", BINOP_INTDIV, PREC_MUL, 0},
365 {"MOD", BINOP_REM, PREC_MUL, 0},
366 {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
367 {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
368 {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
369 {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
370 {"=", BINOP_EQUAL, PREC_EQUAL, 0},
371 {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0},
372 {"<=", BINOP_LEQ, PREC_ORDER, 0},
373 {">=", BINOP_GEQ, PREC_ORDER, 0},
374 {">", BINOP_GTR, PREC_ORDER, 0},
375 {"<", BINOP_LESS, PREC_ORDER, 0},
376 {"^", UNOP_IND, PREC_PREFIX, 0},
377 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
378 {"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0},
379 {"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0},
380 {"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0},
381 {"FLOAT", UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0},
382 {"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0},
383 {"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0},
384 {"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0},
385 {"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0},
386 {"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0},
390 /* The built-in types of Modula-2. */
392 struct type *builtin_type_m2_char;
393 struct type *builtin_type_m2_int;
394 struct type *builtin_type_m2_card;
395 struct type *builtin_type_m2_real;
396 struct type *builtin_type_m2_bool;
398 struct type **const (m2_builtin_types[]) =
400 &builtin_type_m2_char,
401 &builtin_type_m2_int,
402 &builtin_type_m2_card,
403 &builtin_type_m2_real,
404 &builtin_type_m2_bool,
408 const struct language_defn m2_language_defn =
417 &exp_descriptor_standard,
418 m2_parse, /* parser */
419 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 basic_lookup_transparent_type,/* lookup_transparent_type */
432 NULL, /* Language specific symbol demangler */
433 NULL, /* Language specific class_name_from_physname */
434 m2_op_print_tab, /* expression operators for printing */
435 0, /* arrays are first-class (not c-style) */
436 0, /* String lower bound */
437 &builtin_type_m2_char, /* Type of string elements */
438 default_word_break_characters,
439 NULL, /* FIXME: la_language_arch_info. */
443 /* Initialization for Modula-2 */
446 _initialize_m2_language (void)
448 /* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */
449 builtin_type_m2_int =
450 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
452 "INTEGER", (struct objfile *) NULL);
453 builtin_type_m2_card =
454 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
456 "CARDINAL", (struct objfile *) NULL);
457 builtin_type_m2_real =
458 init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
460 "REAL", (struct objfile *) NULL);
461 builtin_type_m2_char =
462 init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
464 "CHAR", (struct objfile *) NULL);
465 builtin_type_m2_bool =
466 init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
468 "BOOLEAN", (struct objfile *) NULL);
470 add_language (&m2_language_defn);