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c906108c SS |
1 | /* Source-language-related definitions for GDB. |
2 | Copyright 1991, 1992 Free Software Foundation, Inc. | |
3 | Contributed by the Department of Computer Science at the State University | |
4 | of New York at Buffalo. | |
5 | ||
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
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. | |
c906108c | 12 | |
c5aa993b JM |
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. | |
c906108c | 17 | |
c5aa993b JM |
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. */ | |
c906108c SS |
22 | |
23 | #if !defined (LANGUAGE_H) | |
24 | #define LANGUAGE_H 1 | |
25 | ||
c5aa993b | 26 | #ifdef __STDC__ /* Forward decls for prototypes */ |
c906108c SS |
27 | struct value; |
28 | struct objfile; | |
29 | struct expression; | |
c5aa993b | 30 | /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */ |
c906108c SS |
31 | #endif |
32 | ||
33 | /* This used to be included to configure GDB for one or more specific | |
34 | languages. Now it is shortcutted to configure for all of them. FIXME. */ | |
35 | /* #include "lang_def.h" */ | |
36 | #define _LANG_c | |
37 | #define _LANG_m2 | |
38 | #define _LANG_chill | |
39 | #define _LANG_fortran | |
40 | ||
c5aa993b | 41 | #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */ |
c906108c SS |
42 | |
43 | /* range_mode == | |
44 | range_mode_auto: range_check set automatically to default of language. | |
45 | range_mode_manual: range_check set manually by user. */ | |
46 | ||
c5aa993b JM |
47 | extern enum range_mode |
48 | { | |
49 | range_mode_auto, range_mode_manual | |
50 | } | |
51 | range_mode; | |
c906108c SS |
52 | |
53 | /* range_check == | |
54 | range_check_on: Ranges are checked in GDB expressions, producing errors. | |
55 | range_check_warn: Ranges are checked, producing warnings. | |
56 | range_check_off: Ranges are not checked in GDB expressions. */ | |
57 | ||
58 | extern enum range_check | |
c5aa993b JM |
59 | { |
60 | range_check_off, range_check_warn, range_check_on | |
61 | } | |
62 | range_check; | |
c906108c SS |
63 | |
64 | /* type_mode == | |
65 | type_mode_auto: type_check set automatically to default of language | |
66 | type_mode_manual: type_check set manually by user. */ | |
67 | ||
c5aa993b JM |
68 | extern enum type_mode |
69 | { | |
70 | type_mode_auto, type_mode_manual | |
71 | } | |
72 | type_mode; | |
c906108c SS |
73 | |
74 | /* type_check == | |
75 | type_check_on: Types are checked in GDB expressions, producing errors. | |
76 | type_check_warn: Types are checked, producing warnings. | |
77 | type_check_off: Types are not checked in GDB expressions. */ | |
78 | ||
79 | extern enum type_check | |
c5aa993b JM |
80 | { |
81 | type_check_off, type_check_warn, type_check_on | |
82 | } | |
83 | type_check; | |
c906108c SS |
84 | \f |
85 | /* Information for doing language dependent formatting of printed values. */ | |
86 | ||
87 | struct language_format_info | |
c5aa993b JM |
88 | { |
89 | /* The format that can be passed directly to standard C printf functions | |
90 | to generate a completely formatted value in the format appropriate for | |
91 | the language. */ | |
c906108c | 92 | |
c5aa993b | 93 | char *la_format; |
c906108c | 94 | |
c5aa993b JM |
95 | /* The prefix to be used when directly printing a value, or constructing |
96 | a standard C printf format. This generally is everything up to the | |
97 | conversion specification (the part introduced by the '%' character | |
98 | and terminated by the conversion specifier character). */ | |
c906108c | 99 | |
c5aa993b | 100 | char *la_format_prefix; |
c906108c | 101 | |
c5aa993b JM |
102 | /* The conversion specifier. This is generally everything after the |
103 | field width and precision, typically only a single character such | |
104 | as 'o' for octal format or 'x' for hexadecimal format. */ | |
c906108c | 105 | |
c5aa993b | 106 | char *la_format_specifier; |
c906108c | 107 | |
c5aa993b JM |
108 | /* The suffix to be used when directly printing a value, or constructing |
109 | a standard C printf format. This generally is everything after the | |
110 | conversion specification (the part introduced by the '%' character | |
111 | and terminated by the conversion specifier character). */ | |
c906108c | 112 | |
c5aa993b JM |
113 | char *la_format_suffix; /* Suffix for custom format string */ |
114 | }; | |
c906108c SS |
115 | |
116 | /* Structure tying together assorted information about a language. */ | |
117 | ||
118 | struct language_defn | |
c5aa993b JM |
119 | { |
120 | /* Name of the language */ | |
c906108c | 121 | |
c5aa993b | 122 | char *la_name; |
c906108c | 123 | |
c5aa993b | 124 | /* its symtab language-enum (defs.h) */ |
c906108c | 125 | |
c5aa993b | 126 | enum language la_language; |
c906108c | 127 | |
c5aa993b JM |
128 | /* Its builtin types. This is a vector ended by a NULL pointer. These |
129 | types can be specified by name in parsing types in expressions, | |
130 | regardless of whether the program being debugged actually defines | |
131 | such a type. */ | |
c906108c | 132 | |
c5aa993b | 133 | struct type **const *la_builtin_type_vector; |
c906108c | 134 | |
c5aa993b | 135 | /* Default range checking */ |
c906108c | 136 | |
c5aa993b | 137 | enum range_check la_range_check; |
c906108c | 138 | |
c5aa993b | 139 | /* Default type checking */ |
c906108c | 140 | |
c5aa993b | 141 | enum type_check la_type_check; |
c906108c | 142 | |
c5aa993b | 143 | /* Parser function. */ |
c906108c | 144 | |
c5aa993b | 145 | int (*la_parser) PARAMS ((void)); |
c906108c | 146 | |
c5aa993b | 147 | /* Parser error function */ |
c906108c | 148 | |
c5aa993b | 149 | void (*la_error) PARAMS ((char *)); |
c906108c | 150 | |
c5aa993b JM |
151 | /* Evaluate an expression. */ |
152 | struct value *(*evaluate_exp) PARAMS ((struct type *, struct expression *, | |
153 | int *, enum noside)); | |
c906108c | 154 | |
c5aa993b | 155 | void (*la_printchar) PARAMS ((int ch, GDB_FILE * stream)); |
c906108c | 156 | |
c5aa993b JM |
157 | void (*la_printstr) PARAMS ((GDB_FILE * stream, char *string, |
158 | unsigned int length, int width, | |
159 | int force_ellipses)); | |
c906108c | 160 | |
c5aa993b | 161 | void (*la_emitchar) PARAMS ((int ch, GDB_FILE * stream, int quoter)); |
c906108c | 162 | |
c5aa993b | 163 | struct type *(*la_fund_type) PARAMS ((struct objfile *, int)); |
c906108c | 164 | |
c5aa993b | 165 | /* Print a type using syntax appropriate for this language. */ |
c906108c | 166 | |
c5aa993b | 167 | void (*la_print_type) PARAMS ((struct type *, char *, GDB_FILE *, int, int)); |
c906108c | 168 | |
c5aa993b | 169 | /* Print a value using syntax appropriate for this language. */ |
c906108c | 170 | |
c5aa993b JM |
171 | int (*la_val_print) PARAMS ((struct type *, char *, int, CORE_ADDR, GDB_FILE *, |
172 | int, int, int, enum val_prettyprint)); | |
c906108c | 173 | |
c5aa993b | 174 | /* Print a top-level value using syntax appropriate for this language. */ |
c906108c | 175 | |
c5aa993b JM |
176 | int (*la_value_print) PARAMS ((struct value *, GDB_FILE *, |
177 | int, enum val_prettyprint)); | |
c906108c | 178 | |
c5aa993b | 179 | /* Base 2 (binary) formats. */ |
c906108c | 180 | |
c5aa993b | 181 | struct language_format_info la_binary_format; |
c906108c | 182 | |
c5aa993b | 183 | /* Base 8 (octal) formats. */ |
c906108c | 184 | |
c5aa993b | 185 | struct language_format_info la_octal_format; |
c906108c | 186 | |
c5aa993b | 187 | /* Base 10 (decimal) formats */ |
c906108c | 188 | |
c5aa993b | 189 | struct language_format_info la_decimal_format; |
c906108c | 190 | |
c5aa993b | 191 | /* Base 16 (hexadecimal) formats */ |
c906108c | 192 | |
c5aa993b | 193 | struct language_format_info la_hex_format; |
c906108c | 194 | |
c5aa993b | 195 | /* Table for printing expressions */ |
c906108c | 196 | |
c5aa993b | 197 | const struct op_print *la_op_print_tab; |
c906108c | 198 | |
c5aa993b JM |
199 | /* Zero if the language has first-class arrays. True if there are no |
200 | array values, and array objects decay to pointers, as in C. */ | |
c906108c | 201 | |
c5aa993b | 202 | char c_style_arrays; |
c906108c | 203 | |
c5aa993b JM |
204 | /* Index to use for extracting the first element of a string. */ |
205 | char string_lower_bound; | |
c906108c | 206 | |
c5aa993b JM |
207 | /* Type of elements of strings. */ |
208 | struct type **string_char_type; | |
c906108c | 209 | |
c5aa993b JM |
210 | /* Add fields above this point, so the magic number is always last. */ |
211 | /* Magic number for compat checking */ | |
212 | ||
213 | long la_magic; | |
214 | ||
215 | }; | |
c906108c SS |
216 | |
217 | #define LANG_MAGIC 910823L | |
218 | ||
219 | /* Pointer to the language_defn for our current language. This pointer | |
220 | always points to *some* valid struct; it can be used without checking | |
221 | it for validity. | |
222 | ||
223 | The current language affects expression parsing and evaluation | |
224 | (FIXME: it might be cleaner to make the evaluation-related stuff | |
225 | separate exp_opcodes for each different set of semantics. We | |
226 | should at least think this through more clearly with respect to | |
227 | what happens if the language is changed between parsing and | |
228 | evaluation) and printing of things like types and arrays. It does | |
229 | *not* affect symbol-reading-- each source file in a symbol-file has | |
230 | its own language and we should keep track of that regardless of the | |
231 | language when symbols are read. If we want some manual setting for | |
232 | the language of symbol files (e.g. detecting when ".c" files are | |
233 | C++), it should be a seprate setting from the current_language. */ | |
234 | ||
235 | extern const struct language_defn *current_language; | |
236 | ||
237 | /* Pointer to the language_defn expected by the user, e.g. the language | |
238 | of main(), or the language we last mentioned in a message, or C. */ | |
239 | ||
240 | extern const struct language_defn *expected_language; | |
241 | ||
242 | /* language_mode == | |
243 | language_mode_auto: current_language automatically set upon selection | |
c5aa993b | 244 | of scope (e.g. stack frame) |
c906108c SS |
245 | language_mode_manual: current_language set only by user. */ |
246 | ||
247 | extern enum language_mode | |
c5aa993b JM |
248 | { |
249 | language_mode_auto, language_mode_manual | |
250 | } | |
251 | language_mode; | |
c906108c SS |
252 | \f |
253 | /* These macros define the behaviour of the expression | |
254 | evaluator. */ | |
255 | ||
256 | /* Should we strictly type check expressions? */ | |
257 | #define STRICT_TYPE (type_check != type_check_off) | |
258 | ||
259 | /* Should we range check values against the domain of their type? */ | |
260 | #define RANGE_CHECK (range_check != range_check_off) | |
261 | ||
262 | /* "cast" really means conversion */ | |
263 | /* FIXME -- should be a setting in language_defn */ | |
264 | #define CAST_IS_CONVERSION (current_language->la_language == language_c || \ | |
265 | current_language->la_language == language_cplus) | |
266 | ||
267 | extern void | |
268 | language_info PARAMS ((int)); | |
269 | ||
270 | extern enum language | |
271 | set_language PARAMS ((enum language)); | |
c906108c | 272 | \f |
c5aa993b | 273 | |
c906108c SS |
274 | /* This page contains functions that return things that are |
275 | specific to languages. Each of these functions is based on | |
276 | the current setting of working_lang, which the user sets | |
277 | with the "set language" command. */ | |
278 | ||
279 | #define create_fundamental_type(objfile,typeid) \ | |
280 | (current_language->la_fund_type(objfile, typeid)) | |
281 | ||
282 | #define LA_PRINT_TYPE(type,varstring,stream,show,level) \ | |
283 | (current_language->la_print_type(type,varstring,stream,show,level)) | |
284 | ||
285 | #define LA_VAL_PRINT(type,valaddr,offset,addr,stream,fmt,deref,recurse,pretty) \ | |
286 | (current_language->la_val_print(type,valaddr,offset,addr,stream,fmt,deref, \ | |
287 | recurse,pretty)) | |
288 | #define LA_VALUE_PRINT(val,stream,fmt,pretty) \ | |
289 | (current_language->la_value_print(val,stream,fmt,pretty)) | |
290 | ||
291 | /* Return a format string for printf that will print a number in one of | |
292 | the local (language-specific) formats. Result is static and is | |
293 | overwritten by the next call. Takes printf options like "08" or "l" | |
294 | (to produce e.g. %08x or %lx). */ | |
295 | ||
296 | #define local_binary_format() \ | |
297 | (current_language->la_binary_format.la_format) | |
298 | #define local_binary_format_prefix() \ | |
299 | (current_language->la_binary_format.la_format_prefix) | |
300 | #define local_binary_format_specifier() \ | |
301 | (current_language->la_binary_format.la_format_specifier) | |
302 | #define local_binary_format_suffix() \ | |
303 | (current_language->la_binary_format.la_format_suffix) | |
304 | ||
305 | #define local_octal_format() \ | |
306 | (current_language->la_octal_format.la_format) | |
307 | #define local_octal_format_prefix() \ | |
308 | (current_language->la_octal_format.la_format_prefix) | |
309 | #define local_octal_format_specifier() \ | |
310 | (current_language->la_octal_format.la_format_specifier) | |
311 | #define local_octal_format_suffix() \ | |
312 | (current_language->la_octal_format.la_format_suffix) | |
313 | ||
314 | #define local_decimal_format() \ | |
315 | (current_language->la_decimal_format.la_format) | |
316 | #define local_decimal_format_prefix() \ | |
317 | (current_language->la_decimal_format.la_format_prefix) | |
318 | #define local_decimal_format_specifier() \ | |
319 | (current_language->la_decimal_format.la_format_specifier) | |
320 | #define local_decimal_format_suffix() \ | |
321 | (current_language->la_decimal_format.la_format_suffix) | |
322 | ||
323 | #define local_hex_format() \ | |
324 | (current_language->la_hex_format.la_format) | |
325 | #define local_hex_format_prefix() \ | |
326 | (current_language->la_hex_format.la_format_prefix) | |
327 | #define local_hex_format_specifier() \ | |
328 | (current_language->la_hex_format.la_format_specifier) | |
329 | #define local_hex_format_suffix() \ | |
330 | (current_language->la_hex_format.la_format_suffix) | |
331 | ||
332 | #define LA_PRINT_CHAR(ch, stream) \ | |
333 | (current_language->la_printchar(ch, stream)) | |
334 | #define LA_PRINT_STRING(stream, string, length, width, force_ellipses) \ | |
335 | (current_language->la_printstr(stream, string, length, width, force_ellipses)) | |
336 | #define LA_EMIT_CHAR(ch, stream, quoter) \ | |
337 | (current_language->la_emitchar(ch, stream, quoter)) | |
338 | ||
339 | /* Test a character to decide whether it can be printed in literal form | |
340 | or needs to be printed in another representation. For example, | |
341 | in C the literal form of the character with octal value 141 is 'a' | |
342 | and the "other representation" is '\141'. The "other representation" | |
343 | is program language dependent. */ | |
344 | ||
345 | #define PRINT_LITERAL_FORM(c) \ | |
346 | ((c) >= 0x20 \ | |
347 | && ((c) < 0x7F || (c) >= 0xA0) \ | |
348 | && (!sevenbit_strings || (c) < 0x80)) | |
349 | ||
350 | /* Return a format string for printf that will print a number in one of | |
351 | the local (language-specific) formats. Result is static and is | |
352 | overwritten by the next call. Takes printf options like "08" or "l" | |
353 | (to produce e.g. %08x or %lx). */ | |
354 | ||
355 | extern char * | |
c5aa993b | 356 | local_decimal_format_custom PARAMS ((char *)); /* language.c */ |
c906108c SS |
357 | |
358 | extern char * | |
c5aa993b | 359 | local_octal_format_custom PARAMS ((char *)); /* language.c */ |
c906108c SS |
360 | |
361 | extern char * | |
c5aa993b | 362 | local_hex_format_custom PARAMS ((char *)); /* language.c */ |
c906108c SS |
363 | |
364 | /* Return a string that contains a number formatted in one of the local | |
365 | (language-specific) formats. Result is static and is overwritten by | |
366 | the next call. Takes printf options like "08" or "l". */ | |
367 | ||
368 | extern char * | |
c5aa993b | 369 | local_hex_string PARAMS ((unsigned long)); /* language.c */ |
c906108c SS |
370 | |
371 | extern char * | |
c5aa993b | 372 | local_hex_string_custom PARAMS ((unsigned long, char *)); /* language.c */ |
c906108c SS |
373 | |
374 | /* Type predicates */ | |
375 | ||
376 | extern int | |
377 | simple_type PARAMS ((struct type *)); | |
378 | ||
379 | extern int | |
380 | ordered_type PARAMS ((struct type *)); | |
381 | ||
382 | extern int | |
383 | same_type PARAMS ((struct type *, struct type *)); | |
384 | ||
385 | extern int | |
386 | integral_type PARAMS ((struct type *)); | |
387 | ||
388 | extern int | |
389 | numeric_type PARAMS ((struct type *)); | |
390 | ||
391 | extern int | |
392 | character_type PARAMS ((struct type *)); | |
393 | ||
394 | extern int | |
395 | boolean_type PARAMS ((struct type *)); | |
396 | ||
397 | extern int | |
398 | float_type PARAMS ((struct type *)); | |
399 | ||
400 | extern int | |
401 | pointer_type PARAMS ((struct type *)); | |
402 | ||
403 | extern int | |
404 | structured_type PARAMS ((struct type *)); | |
405 | ||
406 | /* Checks Binary and Unary operations for semantic type correctness */ | |
407 | /* FIXME: Does not appear to be used */ | |
408 | #define unop_type_check(v,o) binop_type_check((v),NULL,(o)) | |
409 | ||
410 | extern void | |
411 | binop_type_check PARAMS ((struct value *, struct value *, int)); | |
412 | ||
413 | /* Error messages */ | |
414 | ||
415 | extern void | |
416 | op_error PARAMS ((char *fmt, enum exp_opcode, int)); | |
417 | ||
418 | #define type_op_error(f,o) \ | |
419 | op_error((f),(o),type_check==type_check_on ? 1 : 0) | |
420 | #define range_op_error(f,o) \ | |
421 | op_error((f),(o),range_check==range_check_on ? 1 : 0) | |
422 | ||
423 | extern void | |
c5aa993b JM |
424 | type_error |
425 | PARAMS ((char *,...)) | |
426 | ATTR_FORMAT (printf, 1, 2); | |
c906108c | 427 | |
c5aa993b JM |
428 | void |
429 | range_error PARAMS ((char *,...)) | |
430 | ATTR_FORMAT (printf, 1, 2); | |
c906108c SS |
431 | |
432 | /* Data: Does this value represent "truth" to the current language? */ | |
433 | ||
c5aa993b JM |
434 | extern int |
435 | value_true PARAMS ((struct value *)); | |
c906108c | 436 | |
c5aa993b | 437 | extern struct type *lang_bool_type PARAMS ((void)); |
c906108c SS |
438 | |
439 | /* The type used for Boolean values in the current language. */ | |
440 | #define LA_BOOL_TYPE lang_bool_type () | |
441 | ||
442 | /* Misc: The string representing a particular enum language. */ | |
443 | ||
c5aa993b | 444 | extern enum language language_enum PARAMS ((char *str)); |
c906108c | 445 | |
c5aa993b | 446 | extern const struct language_defn *language_def PARAMS ((enum language)); |
7a292a7a | 447 | |
c5aa993b | 448 | extern char *language_str PARAMS ((enum language)); |
c906108c SS |
449 | |
450 | /* Add a language to the set known by GDB (at initialization time). */ | |
451 | ||
c5aa993b JM |
452 | extern void |
453 | add_language PARAMS ((const struct language_defn *)); | |
c906108c | 454 | |
c5aa993b JM |
455 | extern enum language |
456 | get_frame_language PARAMS ((void)); /* In stack.c */ | |
c906108c | 457 | |
c5aa993b | 458 | #endif /* defined (LANGUAGE_H) */ |