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.
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. */
23 #if !defined (LANGUAGE_H)
26 #ifdef __STDC__ /* Forward decls for prototypes */
30 /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */
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" */
41 #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */
44 range_mode_auto: range_check set automatically to default of language.
45 range_mode_manual: range_check set manually by user. */
47 extern enum range_mode
49 range_mode_auto, range_mode_manual
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. */
58 extern enum range_check
60 range_check_off, range_check_warn, range_check_on
65 type_mode_auto: type_check set automatically to default of language
66 type_mode_manual: type_check set manually by user. */
70 type_mode_auto, type_mode_manual
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. */
79 extern enum type_check
81 type_check_off, type_check_warn, type_check_on
85 /* Information for doing language dependent formatting of printed values. */
87 struct language_format_info
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
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). */
100 char *la_format_prefix;
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. */
106 char *la_format_specifier;
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). */
113 char *la_format_suffix; /* Suffix for custom format string */
116 /* Structure tying together assorted information about a language. */
120 /* Name of the language */
124 /* its symtab language-enum (defs.h) */
126 enum language la_language;
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
133 struct type **const *la_builtin_type_vector;
135 /* Default range checking */
137 enum range_check la_range_check;
139 /* Default type checking */
141 enum type_check la_type_check;
143 /* Parser function. */
145 int (*la_parser) PARAMS ((void));
147 /* Parser error function */
149 void (*la_error) PARAMS ((char *));
151 /* Evaluate an expression. */
152 struct value *(*evaluate_exp) PARAMS ((struct type *, struct expression *,
153 int *, enum noside));
155 void (*la_printchar) PARAMS ((int ch, GDB_FILE * stream));
157 void (*la_printstr) PARAMS ((GDB_FILE * stream, char *string,
158 unsigned int length, int width,
159 int force_ellipses));
161 void (*la_emitchar) PARAMS ((int ch, GDB_FILE * stream, int quoter));
163 struct type *(*la_fund_type) PARAMS ((struct objfile *, int));
165 /* Print a type using syntax appropriate for this language. */
167 void (*la_print_type) PARAMS ((struct type *, char *, GDB_FILE *, int, int));
169 /* Print a value using syntax appropriate for this language. */
171 int (*la_val_print) PARAMS ((struct type *, char *, int, CORE_ADDR, GDB_FILE *,
172 int, int, int, enum val_prettyprint));
174 /* Print a top-level value using syntax appropriate for this language. */
176 int (*la_value_print) PARAMS ((struct value *, GDB_FILE *,
177 int, enum val_prettyprint));
179 /* Base 2 (binary) formats. */
181 struct language_format_info la_binary_format;
183 /* Base 8 (octal) formats. */
185 struct language_format_info la_octal_format;
187 /* Base 10 (decimal) formats */
189 struct language_format_info la_decimal_format;
191 /* Base 16 (hexadecimal) formats */
193 struct language_format_info la_hex_format;
195 /* Table for printing expressions */
197 const struct op_print *la_op_print_tab;
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. */
204 /* Index to use for extracting the first element of a string. */
205 char string_lower_bound;
207 /* Type of elements of strings. */
208 struct type **string_char_type;
210 /* Add fields above this point, so the magic number is always last. */
211 /* Magic number for compat checking */
217 #define LANG_MAGIC 910823L
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
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. */
235 extern const struct language_defn *current_language;
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. */
240 extern const struct language_defn *expected_language;
243 language_mode_auto: current_language automatically set upon selection
244 of scope (e.g. stack frame)
245 language_mode_manual: current_language set only by user. */
247 extern enum language_mode
249 language_mode_auto, language_mode_manual
253 /* These macros define the behaviour of the expression
256 /* Should we strictly type check expressions? */
257 #define STRICT_TYPE (type_check != type_check_off)
259 /* Should we range check values against the domain of their type? */
260 #define RANGE_CHECK (range_check != range_check_off)
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)
268 language_info PARAMS ((int));
271 set_language PARAMS ((enum language));
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. */
279 #define create_fundamental_type(objfile,typeid) \
280 (current_language->la_fund_type(objfile, typeid))
282 #define LA_PRINT_TYPE(type,varstring,stream,show,level) \
283 (current_language->la_print_type(type,varstring,stream,show,level))
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, \
288 #define LA_VALUE_PRINT(val,stream,fmt,pretty) \
289 (current_language->la_value_print(val,stream,fmt,pretty))
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). */
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)
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)
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)
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)
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))
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. */
345 #define PRINT_LITERAL_FORM(c) \
347 && ((c) < 0x7F || (c) >= 0xA0) \
348 && (!sevenbit_strings || (c) < 0x80))
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). */
356 local_decimal_format_custom PARAMS ((char *)); /* language.c */
359 local_octal_format_custom PARAMS ((char *)); /* language.c */
362 local_hex_format_custom PARAMS ((char *)); /* language.c */
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". */
369 local_hex_string PARAMS ((unsigned long)); /* language.c */
372 local_hex_string_custom PARAMS ((unsigned long, char *)); /* language.c */
374 /* Type predicates */
377 simple_type PARAMS ((struct type *));
380 ordered_type PARAMS ((struct type *));
383 same_type PARAMS ((struct type *, struct type *));
386 integral_type PARAMS ((struct type *));
389 numeric_type PARAMS ((struct type *));
392 character_type PARAMS ((struct type *));
395 boolean_type PARAMS ((struct type *));
398 float_type PARAMS ((struct type *));
401 pointer_type PARAMS ((struct type *));
404 structured_type PARAMS ((struct type *));
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))
411 binop_type_check PARAMS ((struct value *, struct value *, int));
416 op_error PARAMS ((char *fmt, enum exp_opcode, int));
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)
425 PARAMS ((char *,...))
426 ATTR_FORMAT (printf, 1, 2);
429 range_error PARAMS ((char *,...))
430 ATTR_FORMAT (printf, 1, 2);
432 /* Data: Does this value represent "truth" to the current language? */
435 value_true PARAMS ((struct value *));
437 extern struct type *lang_bool_type PARAMS ((void));
439 /* The type used for Boolean values in the current language. */
440 #define LA_BOOL_TYPE lang_bool_type ()
442 /* Misc: The string representing a particular enum language. */
444 extern enum language language_enum PARAMS ((char *str));
446 extern const struct language_defn *language_def PARAMS ((enum language));
448 extern char *language_str PARAMS ((enum language));
450 /* Add a language to the set known by GDB (at initialization time). */
453 add_language PARAMS ((const struct language_defn *));
456 get_frame_language PARAMS ((void)); /* In stack.c */
458 #endif /* defined (LANGUAGE_H) */