1 /* Source-language-related definitions for GDB.
3 Copyright (C) 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2003, 2004,
4 2007, 2008, 2009 Free Software Foundation, Inc.
6 Contributed by the Department of Computer Science at the State University
7 of New York at Buffalo.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #if !defined (LANGUAGE_H)
27 /* Forward decls for prototypes */
33 struct value_print_options;
35 #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */
38 range_mode_auto: range_check set automatically to default of language.
39 range_mode_manual: range_check set manually by user. */
41 extern enum range_mode
43 range_mode_auto, range_mode_manual
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
54 range_check_off, range_check_warn, range_check_on
59 type_mode_auto: type_check set automatically to default of language
60 type_mode_manual: type_check set manually by user. */
64 type_mode_auto, type_mode_manual
69 type_check_on: Types are checked in GDB expressions, producing errors.
70 type_check_warn: Types are checked, producing warnings.
71 type_check_off: Types are not checked in GDB expressions. */
73 extern enum type_check
75 type_check_off, type_check_warn, type_check_on
80 case_mode_auto: case_sensitivity set upon selection of scope
81 case_mode_manual: case_sensitivity set only by user. */
85 case_mode_auto, case_mode_manual
90 array_row_major: Arrays are in row major order
91 array_column_major: Arrays are in column major order.*/
93 extern enum array_ordering
95 array_row_major, array_column_major
100 /* case_sensitivity ==
101 case_sensitive_on: Case sensitivity in name matching is used
102 case_sensitive_off: Case sensitivity in name matching is not used */
104 extern enum case_sensitivity
106 case_sensitive_on, case_sensitive_off
111 /* macro_expansion ==
112 macro_expansion_no: No macro expansion is available
113 macro_expansion_c: C-like macro expansion is available */
117 macro_expansion_no, macro_expansion_c
121 /* Per architecture (OS/ABI) language information. */
123 struct language_arch_info
125 /* Its primitive types. This is a vector ended by a NULL pointer.
126 These types can be specified by name in parsing types in
127 expressions, regardless of whether the program being debugged
128 actually defines such a type. */
129 struct type **primitive_type_vector;
130 /* Type of elements of strings. */
131 struct type *string_char_type;
133 /* Symbol name of type to use as boolean type, if defined. */
134 const char *bool_type_symbol;
135 /* Otherwise, this is the default boolean builtin type. */
136 struct type *bool_type_default;
139 /* Structure tying together assorted information about a language. */
143 /* Name of the language */
147 /* its symtab language-enum (defs.h) */
149 enum language la_language;
151 /* Default range checking */
153 enum range_check la_range_check;
155 /* Default type checking */
157 enum type_check la_type_check;
159 /* Default case sensitivity */
160 enum case_sensitivity la_case_sensitivity;
162 /* Multi-dimensional array ordering */
163 enum array_ordering la_array_ordering;
165 /* Style of macro expansion, if any, supported by this language. */
166 enum macro_expansion la_macro_expansion;
168 /* Definitions related to expression printing, prefixifying, and
171 const struct exp_descriptor *la_exp_desc;
173 /* Parser function. */
175 int (*la_parser) (void);
177 /* Parser error function */
179 void (*la_error) (char *);
181 /* Given an expression *EXPP created by prefixifying the result of
182 la_parser, perform any remaining processing necessary to complete
183 its translation. *EXPP may change; la_post_parser is responsible
184 for releasing its previous contents, if necessary. If
185 VOID_CONTEXT_P, then no value is expected from the expression. */
187 void (*la_post_parser) (struct expression ** expp, int void_context_p);
189 void (*la_printchar) (int ch, struct type *chtype, struct ui_file * stream);
191 void (*la_printstr) (struct ui_file * stream, struct type *elttype,
192 const gdb_byte *string, unsigned int length,
194 const struct value_print_options *);
196 void (*la_emitchar) (int ch, struct type *chtype,
197 struct ui_file * stream, int quoter);
199 /* Print a type using syntax appropriate for this language. */
201 void (*la_print_type) (struct type *, char *, struct ui_file *, int,
204 /* Print a typedef using syntax appropriate for this language.
205 TYPE is the underlying type. NEW_SYMBOL is the symbol naming
206 the type. STREAM is the output stream on which to print. */
208 void (*la_print_typedef) (struct type *type, struct symbol *new_symbol,
209 struct ui_file *stream);
211 /* Print a value using syntax appropriate for this language. */
213 int (*la_val_print) (struct type *, const gdb_byte *, int, CORE_ADDR,
214 struct ui_file *, int,
215 const struct value_print_options *);
217 /* Print a top-level value using syntax appropriate for this language. */
219 int (*la_value_print) (struct value *, struct ui_file *,
220 const struct value_print_options *);
222 /* PC is possibly an unknown languages trampoline.
223 If that PC falls in a trampoline belonging to this language,
224 return the address of the first pc in the real function, or 0
225 if it isn't a language tramp for this language. */
226 CORE_ADDR (*skip_trampoline) (struct frame_info *, CORE_ADDR);
228 /* Now come some hooks for lookup_symbol. */
230 /* If this is non-NULL, specifies the name that of the implicit
231 local variable that refers to the current object instance. */
233 char *la_name_of_this;
235 /* This is a function that lookup_symbol will call when it gets to
236 the part of symbol lookup where C looks up static and global
239 struct symbol *(*la_lookup_symbol_nonlocal) (const char *,
241 const struct block *,
244 /* Find the definition of the type with the given name. */
245 struct type *(*la_lookup_transparent_type) (const char *);
247 /* Return demangled language symbol, or NULL. */
248 char *(*la_demangle) (const char *mangled, int options);
250 /* Return class name of a mangled method name or NULL. */
251 char *(*la_class_name_from_physname) (const char *physname);
253 /* Table for printing expressions */
255 const struct op_print *la_op_print_tab;
257 /* Zero if the language has first-class arrays. True if there are no
258 array values, and array objects decay to pointers, as in C. */
262 /* Index to use for extracting the first element of a string. */
263 char string_lower_bound;
265 /* The list of characters forming word boundaries. */
266 char *(*la_word_break_characters) (void);
268 /* Should return a NULL terminated array of all symbols which
269 are possible completions for TEXT. WORD is the entire command
270 on which the completion is being made. */
271 char **(*la_make_symbol_completion_list) (char *text, char *word);
273 /* The per-architecture (OS/ABI) language information. */
274 void (*la_language_arch_info) (struct gdbarch *,
275 struct language_arch_info *);
277 /* Print the index of an element of an array. */
278 void (*la_print_array_index) (struct value *index_value,
279 struct ui_file *stream,
280 const struct value_print_options *options);
282 /* Return non-zero if TYPE should be passed (and returned) by
283 reference at the language level. */
284 int (*la_pass_by_reference) (struct type *type);
286 /* Obtain a string from the inferior, storing it in a newly allocated
287 buffer in BUFFER, which should be freed by the caller. LENGTH will
288 hold the size in bytes of the string (only actual characters, excluding
289 an eventual terminating null character). CHARSET will hold the encoding
290 used in the string. */
291 void (*la_get_string) (struct value *value, gdb_byte **buffer, int *length,
292 const char **charset);
294 /* Add fields above this point, so the magic number is always last. */
295 /* Magic number for compat checking */
301 #define LANG_MAGIC 910823L
303 /* Pointer to the language_defn for our current language. This pointer
304 always points to *some* valid struct; it can be used without checking
307 The current language affects expression parsing and evaluation
308 (FIXME: it might be cleaner to make the evaluation-related stuff
309 separate exp_opcodes for each different set of semantics. We
310 should at least think this through more clearly with respect to
311 what happens if the language is changed between parsing and
312 evaluation) and printing of things like types and arrays. It does
313 *not* affect symbol-reading-- each source file in a symbol-file has
314 its own language and we should keep track of that regardless of the
315 language when symbols are read. If we want some manual setting for
316 the language of symbol files (e.g. detecting when ".c" files are
317 C++), it should be a separate setting from the current_language. */
319 extern const struct language_defn *current_language;
321 /* Pointer to the language_defn expected by the user, e.g. the language
322 of main(), or the language we last mentioned in a message, or C. */
324 extern const struct language_defn *expected_language;
327 language_mode_auto: current_language automatically set upon selection
328 of scope (e.g. stack frame)
329 language_mode_manual: current_language set only by user. */
331 extern enum language_mode
333 language_mode_auto, language_mode_manual
337 struct type *language_bool_type (const struct language_defn *l,
338 struct gdbarch *gdbarch);
340 struct type *language_string_char_type (const struct language_defn *l,
341 struct gdbarch *gdbarch);
343 struct type *language_lookup_primitive_type_by_name (const struct language_defn *l,
344 struct gdbarch *gdbarch,
348 /* These macros define the behaviour of the expression
351 /* Should we strictly type check expressions? */
352 #define STRICT_TYPE (type_check != type_check_off)
354 /* Should we range check values against the domain of their type? */
355 #define RANGE_CHECK (range_check != range_check_off)
357 /* "cast" really means conversion */
358 /* FIXME -- should be a setting in language_defn */
359 #define CAST_IS_CONVERSION (current_language->la_language == language_c || \
360 current_language->la_language == language_cplus || \
361 current_language->la_language == language_objc)
363 extern void language_info (int);
365 extern enum language set_language (enum language);
368 /* This page contains functions that return things that are
369 specific to languages. Each of these functions is based on
370 the current setting of working_lang, which the user sets
371 with the "set language" command. */
373 #define LA_PRINT_TYPE(type,varstring,stream,show,level) \
374 (current_language->la_print_type(type,varstring,stream,show,level))
376 #define LA_PRINT_TYPEDEF(type,new_symbol,stream) \
377 (current_language->la_print_typedef(type,new_symbol,stream))
379 #define LA_VAL_PRINT(type,valaddr,offset,addr,stream,recurse,options) \
380 (current_language->la_val_print(type,valaddr,offset,addr,stream, \
382 #define LA_VALUE_PRINT(val,stream,options) \
383 (current_language->la_value_print(val,stream,options))
385 #define LA_PRINT_CHAR(ch, type, stream) \
386 (current_language->la_printchar(ch, type, stream))
387 #define LA_PRINT_STRING(stream, elttype, string, length, force_ellipses,options) \
388 (current_language->la_printstr(stream, elttype, string, length, \
389 force_ellipses,options))
390 #define LA_EMIT_CHAR(ch, type, stream, quoter) \
391 (current_language->la_emitchar(ch, type, stream, quoter))
392 #define LA_GET_STRING(value, buffer, length, encoding) \
393 (current_language->la_get_string(value, buffer, length, encoding))
395 #define LA_PRINT_ARRAY_INDEX(index_value, stream, optins) \
396 (current_language->la_print_array_index(index_value, stream, options))
398 /* Test a character to decide whether it can be printed in literal form
399 or needs to be printed in another representation. For example,
400 in C the literal form of the character with octal value 141 is 'a'
401 and the "other representation" is '\141'. The "other representation"
402 is program language dependent. */
404 #define PRINT_LITERAL_FORM(c) \
406 && ((c) < 0x7F || (c) >= 0xA0) \
407 && (!sevenbit_strings || (c) < 0x80))
410 /* FIXME: cagney/2000-03-04: This function does not appear to be used.
411 It can be deleted once 5.0 has been released. */
412 /* Return a string that contains the hex digits of the number. No preceeding
415 extern char *longest_raw_hex_string (LONGEST);
418 /* Type predicates */
420 extern int simple_type (struct type *);
422 extern int ordered_type (struct type *);
424 extern int same_type (struct type *, struct type *);
426 extern int integral_type (struct type *);
428 extern int numeric_type (struct type *);
430 extern int character_type (struct type *);
432 extern int boolean_type (struct type *);
434 extern int float_type (struct type *);
436 extern int pointer_type (struct type *);
438 extern int structured_type (struct type *);
440 /* Checks Binary and Unary operations for semantic type correctness */
441 /* FIXME: Does not appear to be used */
442 #define unop_type_check(v,o) binop_type_check((v),NULL,(o))
444 extern void binop_type_check (struct value *, struct value *, int);
448 extern void type_error (const char *, ...) ATTR_FORMAT (printf, 1, 2);
450 extern void range_error (const char *, ...) ATTR_FORMAT (printf, 1, 2);
452 /* Data: Does this value represent "truth" to the current language? */
454 extern int value_true (struct value *);
456 /* Misc: The string representing a particular enum language. */
458 extern enum language language_enum (char *str);
460 extern const struct language_defn *language_def (enum language);
462 extern char *language_str (enum language);
464 /* Add a language to the set known by GDB (at initialization time). */
466 extern void add_language (const struct language_defn *);
468 extern enum language get_frame_language (void); /* In stack.c */
470 /* Check for a language-specific trampoline. */
472 extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
474 /* Return demangled language symbol, or NULL. */
475 extern char *language_demangle (const struct language_defn *current_language,
476 const char *mangled, int options);
478 /* Return class name from physname, or NULL. */
479 extern char *language_class_name_from_physname (const struct language_defn *,
480 const char *physname);
482 /* Splitting strings into words. */
483 extern char *default_word_break_characters (void);
485 /* Print the index of an array element using the C99 syntax. */
486 extern void default_print_array_index (struct value *index_value,
487 struct ui_file *stream,
488 const struct value_print_options *options);
490 /* Return non-zero if TYPE should be passed (and returned) by
491 reference at the language level. */
492 int language_pass_by_reference (struct type *type);
494 /* Return zero; by default, types are passed by value at the language
495 level. The target ABI may pass or return some structs by reference
496 independent of this. */
497 int default_pass_by_reference (struct type *type);
499 /* The default implementation of la_print_typedef. */
500 void default_print_typedef (struct type *type, struct symbol *new_symbol,
501 struct ui_file *stream);
503 void default_get_string (struct value *value, gdb_byte **buffer, int *length,
504 const char **charset);
506 void c_get_string (struct value *value, gdb_byte **buffer, int *length,
507 const char **charset);
509 #endif /* defined (LANGUAGE_H) */