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., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #if !defined (LANGUAGE_H)
25 #ifdef __STDC__ /* Forward decls for prototypes */
28 /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */
31 /* This used to be included to configure GDB for one or more specific
32 languages. Now it is shortcutted to configure for all of them. FIXME. */
33 /* #include "lang_def.h" */
39 #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */
42 range_mode_auto: range_check set automatically to default of language.
43 range_mode_manual: range_check set manually by user. */
45 extern enum range_mode {range_mode_auto, range_mode_manual} range_mode;
48 range_check_on: Ranges are checked in GDB expressions, producing errors.
49 range_check_warn: Ranges are checked, producing warnings.
50 range_check_off: Ranges are not checked in GDB expressions. */
52 extern enum range_check
53 {range_check_off, range_check_warn, range_check_on} range_check;
56 type_mode_auto: type_check set automatically to default of language
57 type_mode_manual: type_check set manually by user. */
59 extern enum type_mode {type_mode_auto, type_mode_manual} type_mode;
62 type_check_on: Types are checked in GDB expressions, producing errors.
63 type_check_warn: Types are checked, producing warnings.
64 type_check_off: Types are not checked in GDB expressions. */
66 extern enum type_check
67 {type_check_off, type_check_warn, type_check_on} type_check;
69 /* Information for doing language dependent formatting of printed values. */
71 struct language_format_info
73 /* The format that can be passed directly to standard C printf functions
74 to generate a completely formatted value in the format appropriate for
79 /* The prefix to be used when directly printing a value, or constructing
80 a standard C printf format. This generally is everything up to the
81 conversion specification (the part introduced by the '%' character
82 and terminated by the conversion specifier character). */
84 char *la_format_prefix;
86 /* The conversion specifier. This is generally everything after the
87 field width and precision, typically only a single character such
88 as 'o' for octal format or 'x' for hexadecimal format. */
90 char *la_format_specifier;
92 /* The suffix to be used when directly printing a value, or constructing
93 a standard C printf format. This generally is everything after the
94 conversion specification (the part introduced by the '%' character
95 and terminated by the conversion specifier character). */
97 char *la_format_suffix; /* Suffix for custom format string */
100 /* Structure tying together assorted information about a language. */
104 /* Name of the language */
108 /* its symtab language-enum (defs.h) */
110 enum language la_language;
112 /* Its builtin types. This is a vector ended by a NULL pointer. These
113 types can be specified by name in parsing types in expressions,
114 regardless of whether the program being debugged actually defines
117 struct type ** const *la_builtin_type_vector;
119 /* Default range checking */
121 enum range_check la_range_check;
123 /* Default type checking */
125 enum type_check la_type_check;
127 /* Parser function. */
129 int (*la_parser) PARAMS((void));
131 /* Parser error function */
133 void (*la_error) PARAMS ((char *));
135 void (*la_printchar) PARAMS ((int, GDB_FILE *));
137 void (*la_printstr) PARAMS ((GDB_FILE *, char *, unsigned int, int));
139 struct type *(*la_fund_type) PARAMS ((struct objfile *, int));
141 /* Print a type using syntax appropriate for this language. */
143 void (*la_print_type) PARAMS ((struct type *, char *, GDB_FILE *, int, int));
145 /* Print a value using syntax appropriate for this language. */
147 int (*la_val_print) PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *,
148 int, int, int, enum val_prettyprint));
150 /* Print a top-level value using syntax appropriate for this language. */
152 int (*la_value_print) PARAMS ((struct value *, GDB_FILE *,
153 int, enum val_prettyprint));
155 /* Base 2 (binary) formats. */
157 struct language_format_info la_binary_format;
159 /* Base 8 (octal) formats. */
161 struct language_format_info la_octal_format;
163 /* Base 10 (decimal) formats */
165 struct language_format_info la_decimal_format;
167 /* Base 16 (hexadecimal) formats */
169 struct language_format_info la_hex_format;
171 /* Table for printing expressions */
173 const struct op_print *la_op_print_tab;
175 /* Add fields above this point, so the magic number is always last. */
176 /* Magic number for compat checking */
182 #define LANG_MAGIC 910823L
184 /* Pointer to the language_defn for our current language. This pointer
185 always points to *some* valid struct; it can be used without checking
188 The current language affects expression parsing and evaluation
189 (FIXME: it might be cleaner to make the evaluation-related stuff
190 separate exp_opcodes for each different set of semantics. We
191 should at least think this through more clearly with respect to
192 what happens if the language is changed between parsing and
193 evaluation) and printing of things like types and arrays. It does
194 *not* affect symbol-reading-- each source file in a symbol-file has
195 its own language and we should keep track of that regardless of the
196 language when symbols are read. If we want some manual setting for
197 the language of symbol files (e.g. detecting when ".c" files are
198 C++), it should be a seprate setting from the current_language. */
200 extern const struct language_defn *current_language;
202 /* Pointer to the language_defn expected by the user, e.g. the language
203 of main(), or the language we last mentioned in a message, or C. */
205 extern const struct language_defn *expected_language;
208 language_mode_auto: current_language automatically set upon selection
209 of scope (e.g. stack frame)
210 language_mode_manual: current_language set only by user. */
212 extern enum language_mode
213 {language_mode_auto, language_mode_manual} language_mode;
215 /* These macros define the behaviour of the expression
218 /* Should we strictly type check expressions? */
219 #define STRICT_TYPE (type_check != type_check_off)
221 /* Should we range check values against the domain of their type? */
222 #define RANGE_CHECK (range_check != range_check_off)
224 /* "cast" really means conversion */
225 /* FIXME -- should be a setting in language_defn */
226 #define CAST_IS_CONVERSION (current_language->la_language == language_c || \
227 current_language->la_language == language_cplus)
230 language_info PARAMS ((int));
233 set_language PARAMS ((enum language));
236 /* This page contains functions that return things that are
237 specific to languages. Each of these functions is based on
238 the current setting of working_lang, which the user sets
239 with the "set language" command. */
241 #define create_fundamental_type(objfile,typeid) \
242 (current_language->la_fund_type(objfile, typeid))
244 #define LA_PRINT_TYPE(type,varstring,stream,show,level) \
245 (current_language->la_print_type(type,varstring,stream,show,level))
247 #define LA_VAL_PRINT(type,valaddr,addr,stream,fmt,deref,recurse,pretty) \
248 (current_language->la_val_print(type,valaddr,addr,stream,fmt,deref, \
250 #define LA_VALUE_PRINT(val,stream,fmt,pretty) \
251 (current_language->la_value_print(val,stream,fmt,pretty))
253 /* Return a format string for printf that will print a number in one of
254 the local (language-specific) formats. Result is static and is
255 overwritten by the next call. Takes printf options like "08" or "l"
256 (to produce e.g. %08x or %lx). */
258 #define local_binary_format() \
259 (current_language->la_binary_format.la_format)
260 #define local_binary_format_prefix() \
261 (current_language->la_binary_format.la_format_prefix)
262 #define local_binary_format_specifier() \
263 (current_language->la_binary_format.la_format_specifier)
264 #define local_binary_format_suffix() \
265 (current_language->la_binary_format.la_format_suffix)
267 #define local_octal_format() \
268 (current_language->la_octal_format.la_format)
269 #define local_octal_format_prefix() \
270 (current_language->la_octal_format.la_format_prefix)
271 #define local_octal_format_specifier() \
272 (current_language->la_octal_format.la_format_specifier)
273 #define local_octal_format_suffix() \
274 (current_language->la_octal_format.la_format_suffix)
276 #define local_decimal_format() \
277 (current_language->la_decimal_format.la_format)
278 #define local_decimal_format_prefix() \
279 (current_language->la_decimal_format.la_format_prefix)
280 #define local_decimal_format_specifier() \
281 (current_language->la_decimal_format.la_format_specifier)
282 #define local_decimal_format_suffix() \
283 (current_language->la_decimal_format.la_format_suffix)
285 #define local_hex_format() \
286 (current_language->la_hex_format.la_format)
287 #define local_hex_format_prefix() \
288 (current_language->la_hex_format.la_format_prefix)
289 #define local_hex_format_specifier() \
290 (current_language->la_hex_format.la_format_specifier)
291 #define local_hex_format_suffix() \
292 (current_language->la_hex_format.la_format_suffix)
294 #define LA_PRINT_CHAR(ch, stream) \
295 (current_language->la_printchar(ch, stream))
296 #define LA_PRINT_STRING(stream, string, length, force_ellipses) \
297 (current_language->la_printstr(stream, string, length, force_ellipses))
299 /* Test a character to decide whether it can be printed in literal form
300 or needs to be printed in another representation. For example,
301 in C the literal form of the character with octal value 141 is 'a'
302 and the "other representation" is '\141'. The "other representation"
303 is program language dependent. */
305 #define PRINT_LITERAL_FORM(c) \
306 ((c)>=0x20 && ((c)<0x7F || (c)>=0xA0) && (!sevenbit_strings || (c)<0x80))
308 /* Return a format string for printf that will print a number in one of
309 the local (language-specific) formats. Result is static and is
310 overwritten by the next call. Takes printf options like "08" or "l"
311 (to produce e.g. %08x or %lx). */
314 local_decimal_format_custom PARAMS ((char *)); /* language.c */
317 local_octal_format_custom PARAMS ((char *)); /* language.c */
320 local_hex_format_custom PARAMS ((char *)); /* language.c */
322 /* Return a string that contains a number formatted in one of the local
323 (language-specific) formats. Result is static and is overwritten by
324 the next call. Takes printf options like "08" or "l". */
327 local_hex_string PARAMS ((unsigned long)); /* language.c */
330 local_hex_string_custom PARAMS ((unsigned long, char *)); /* language.c */
332 /* Type predicates */
335 simple_type PARAMS ((struct type *));
338 ordered_type PARAMS ((struct type *));
341 same_type PARAMS ((struct type *, struct type *));
344 integral_type PARAMS ((struct type *));
347 numeric_type PARAMS ((struct type *));
350 character_type PARAMS ((struct type *));
353 boolean_type PARAMS ((struct type *));
356 float_type PARAMS ((struct type *));
359 pointer_type PARAMS ((struct type *));
362 structured_type PARAMS ((struct type *));
364 /* Checks Binary and Unary operations for semantic type correctness */
365 /* FIXME: Does not appear to be used */
366 #define unop_type_check(v,o) binop_type_check((v),NULL,(o))
369 binop_type_check PARAMS ((struct value *, struct value *, int));
374 op_error PARAMS ((char *fmt, enum exp_opcode, int));
376 #define type_op_error(f,o) \
377 op_error((f),(o),type_check==type_check_on ? 1 : 0)
378 #define range_op_error(f,o) \
379 op_error((f),(o),range_check==range_check_on ? 1 : 0)
387 /* Data: Does this value represent "truth" to the current language? */
390 value_true PARAMS ((struct value *));
392 /* Misc: The string representing a particular enum language. */
394 extern const struct language_defn *
395 language_def PARAMS ((enum language));
398 language_str PARAMS ((enum language));
400 /* Add a language to the set known by GDB (at initialization time). */
403 add_language PARAMS ((const struct language_defn *));
406 get_frame_language PARAMS ((void)); /* In stack.c */
408 #endif /* defined (LANGUAGE_H) */