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1 /* Definitions for values of C expressions, for GDB.
2
3 Copyright (C) 1986-2012 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20 #if !defined (VALUE_H)
21 #define VALUE_H 1
22
23 #include "doublest.h"
24 #include "frame.h" /* For struct frame_id. */
25
26 struct block;
27 struct expression;
28 struct regcache;
29 struct symbol;
30 struct type;
31 struct ui_file;
32 struct language_defn;
33 struct value_print_options;
34
35 /* The structure which defines the type of a value. It should never
36 be possible for a program lval value to survive over a call to the
37 inferior (i.e. to be put into the history list or an internal
38 variable). */
39
40 struct value;
41
42 /* Values are stored in a chain, so that they can be deleted easily
43 over calls to the inferior. Values assigned to internal variables,
44 put into the value history or exposed to Python are taken off this
45 list. */
46
47 struct value *value_next (struct value *);
48
49 /* Type of the value. */
50
51 extern struct type *value_type (const struct value *);
52
53 /* This is being used to change the type of an existing value, that
54 code should instead be creating a new value with the changed type
55 (but possibly shared content). */
56
57 extern void deprecated_set_value_type (struct value *value,
58 struct type *type);
59
60 /* Only used for bitfields; number of bits contained in them. */
61
62 extern int value_bitsize (const struct value *);
63 extern void set_value_bitsize (struct value *, int bit);
64
65 /* Only used for bitfields; position of start of field. For
66 gdbarch_bits_big_endian=0 targets, it is the position of the LSB. For
67 gdbarch_bits_big_endian=1 targets, it is the position of the MSB. */
68
69 extern int value_bitpos (const struct value *);
70 extern void set_value_bitpos (struct value *, int bit);
71
72 /* Only used for bitfields; the containing value. This allows a
73 single read from the target when displaying multiple
74 bitfields. */
75
76 struct value *value_parent (struct value *);
77
78 /* Describes offset of a value within lval of a structure in bytes.
79 If lval == lval_memory, this is an offset to the address. If lval
80 == lval_register, this is a further offset from location.address
81 within the registers structure. Note also the member
82 embedded_offset below. */
83
84 extern int value_offset (const struct value *);
85 extern void set_value_offset (struct value *, int offset);
86
87 /* The comment from "struct value" reads: ``Is it modifiable? Only
88 relevant if lval != not_lval.''. Shouldn't the value instead be
89 not_lval and be done with it? */
90
91 extern int deprecated_value_modifiable (struct value *value);
92 extern void deprecated_set_value_modifiable (struct value *value,
93 int modifiable);
94
95 /* If a value represents a C++ object, then the `type' field gives the
96 object's compile-time type. If the object actually belongs to some
97 class derived from `type', perhaps with other base classes and
98 additional members, then `type' is just a subobject of the real
99 thing, and the full object is probably larger than `type' would
100 suggest.
101
102 If `type' is a dynamic class (i.e. one with a vtable), then GDB can
103 actually determine the object's run-time type by looking at the
104 run-time type information in the vtable. When this information is
105 available, we may elect to read in the entire object, for several
106 reasons:
107
108 - When printing the value, the user would probably rather see the
109 full object, not just the limited portion apparent from the
110 compile-time type.
111
112 - If `type' has virtual base classes, then even printing `type'
113 alone may require reaching outside the `type' portion of the
114 object to wherever the virtual base class has been stored.
115
116 When we store the entire object, `enclosing_type' is the run-time
117 type -- the complete object -- and `embedded_offset' is the offset
118 of `type' within that larger type, in bytes. The value_contents()
119 macro takes `embedded_offset' into account, so most GDB code
120 continues to see the `type' portion of the value, just as the
121 inferior would.
122
123 If `type' is a pointer to an object, then `enclosing_type' is a
124 pointer to the object's run-time type, and `pointed_to_offset' is
125 the offset in bytes from the full object to the pointed-to object
126 -- that is, the value `embedded_offset' would have if we followed
127 the pointer and fetched the complete object. (I don't really see
128 the point. Why not just determine the run-time type when you
129 indirect, and avoid the special case? The contents don't matter
130 until you indirect anyway.)
131
132 If we're not doing anything fancy, `enclosing_type' is equal to
133 `type', and `embedded_offset' is zero, so everything works
134 normally. */
135
136 extern struct type *value_enclosing_type (struct value *);
137 extern void set_value_enclosing_type (struct value *val,
138 struct type *new_type);
139
140 extern int value_pointed_to_offset (struct value *value);
141 extern void set_value_pointed_to_offset (struct value *value, int val);
142 extern int value_embedded_offset (struct value *value);
143 extern void set_value_embedded_offset (struct value *value, int val);
144
145 /* For lval_computed values, this structure holds functions used to
146 retrieve and set the value (or portions of the value).
147
148 For each function, 'V' is the 'this' pointer: an lval_funcs
149 function F may always assume that the V it receives is an
150 lval_computed value, and has F in the appropriate slot of its
151 lval_funcs structure. */
152
153 struct lval_funcs
154 {
155 /* Fill in VALUE's contents. This is used to "un-lazy" values. If
156 a problem arises in obtaining VALUE's bits, this function should
157 call 'error'. If it is NULL value_fetch_lazy on "un-lazy"
158 non-optimized-out value is an internal error. */
159 void (*read) (struct value *v);
160
161 /* Handle an assignment TOVAL = FROMVAL by writing the value of
162 FROMVAL to TOVAL's location. The contents of TOVAL have not yet
163 been updated. If a problem arises in doing so, this function
164 should call 'error'. If it is NULL such TOVAL assignment is an error as
165 TOVAL is not considered as an lvalue. */
166 void (*write) (struct value *toval, struct value *fromval);
167
168 /* Check the validity of some bits in VALUE. This should return 1
169 if all the bits starting at OFFSET and extending for LENGTH bits
170 are valid, or 0 if any bit is invalid. */
171 int (*check_validity) (const struct value *value, int offset, int length);
172
173 /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */
174 int (*check_any_valid) (const struct value *value);
175
176 /* If non-NULL, this is used to implement pointer indirection for
177 this value. This method may return NULL, in which case value_ind
178 will fall back to ordinary indirection. */
179 struct value *(*indirect) (struct value *value);
180
181 /* If non-NULL, this is used to implement reference resolving for
182 this value. This method may return NULL, in which case coerce_ref
183 will fall back to ordinary references resolving. */
184 struct value *(*coerce_ref) (const struct value *value);
185
186 /* If non-NULL, this is used to determine whether the indicated bits
187 of VALUE are a synthetic pointer. */
188 int (*check_synthetic_pointer) (const struct value *value,
189 int offset, int length);
190
191 /* Return a duplicate of VALUE's closure, for use in a new value.
192 This may simply return the same closure, if VALUE's is
193 reference-counted or statically allocated.
194
195 This may be NULL, in which case VALUE's closure is re-used in the
196 new value. */
197 void *(*copy_closure) (const struct value *v);
198
199 /* Drop VALUE's reference to its closure. Maybe this frees the
200 closure; maybe this decrements a reference count; maybe the
201 closure is statically allocated and this does nothing.
202
203 This may be NULL, in which case no action is taken to free
204 VALUE's closure. */
205 void (*free_closure) (struct value *v);
206 };
207
208 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
209 and closure CLOSURE. */
210
211 extern struct value *allocate_computed_value (struct type *type,
212 const struct lval_funcs *funcs,
213 void *closure);
214
215 extern struct value *allocate_optimized_out_value (struct type *type);
216
217 /* If VALUE is lval_computed, return its lval_funcs structure. */
218
219 extern const struct lval_funcs *value_computed_funcs (const struct value *);
220
221 /* If VALUE is lval_computed, return its closure. The meaning of the
222 returned value depends on the functions VALUE uses. */
223
224 extern void *value_computed_closure (const struct value *value);
225
226 /* If zero, contents of this value are in the contents field. If
227 nonzero, contents are in inferior. If the lval field is lval_memory,
228 the contents are in inferior memory at location.address plus offset.
229 The lval field may also be lval_register.
230
231 WARNING: This field is used by the code which handles watchpoints
232 (see breakpoint.c) to decide whether a particular value can be
233 watched by hardware watchpoints. If the lazy flag is set for some
234 member of a value chain, it is assumed that this member of the
235 chain doesn't need to be watched as part of watching the value
236 itself. This is how GDB avoids watching the entire struct or array
237 when the user wants to watch a single struct member or array
238 element. If you ever change the way lazy flag is set and reset, be
239 sure to consider this use as well! */
240
241 extern int value_lazy (struct value *);
242 extern void set_value_lazy (struct value *value, int val);
243
244 extern int value_stack (struct value *);
245 extern void set_value_stack (struct value *value, int val);
246
247 /* value_contents() and value_contents_raw() both return the address
248 of the gdb buffer used to hold a copy of the contents of the lval.
249 value_contents() is used when the contents of the buffer are needed
250 -- it uses value_fetch_lazy() to load the buffer from the process
251 being debugged if it hasn't already been loaded
252 (value_contents_writeable() is used when a writeable but fetched
253 buffer is required).. value_contents_raw() is used when data is
254 being stored into the buffer, or when it is certain that the
255 contents of the buffer are valid.
256
257 Note: The contents pointer is adjusted by the offset required to
258 get to the real subobject, if the value happens to represent
259 something embedded in a larger run-time object. */
260
261 extern gdb_byte *value_contents_raw (struct value *);
262
263 /* Actual contents of the value. For use of this value; setting it
264 uses the stuff above. Not valid if lazy is nonzero. Target
265 byte-order. We force it to be aligned properly for any possible
266 value. Note that a value therefore extends beyond what is
267 declared here. */
268
269 extern const gdb_byte *value_contents (struct value *);
270 extern gdb_byte *value_contents_writeable (struct value *);
271
272 /* The ALL variants of the above two macros do not adjust the returned
273 pointer by the embedded_offset value. */
274
275 extern gdb_byte *value_contents_all_raw (struct value *);
276 extern const gdb_byte *value_contents_all (struct value *);
277
278 /* Like value_contents_all, but does not require that the returned
279 bits be valid. This should only be used in situations where you
280 plan to check the validity manually. */
281 extern const gdb_byte *value_contents_for_printing (struct value *value);
282
283 /* Like value_contents_for_printing, but accepts a constant value
284 pointer. Unlike value_contents_for_printing however, the pointed
285 value must _not_ be lazy. */
286 extern const gdb_byte *
287 value_contents_for_printing_const (const struct value *value);
288
289 extern int value_fetch_lazy (struct value *val);
290 extern int value_contents_equal (struct value *val1, struct value *val2);
291
292 /* If nonzero, this is the value of a variable which does not actually
293 exist in the program. */
294 extern int value_optimized_out (struct value *value);
295 extern void set_value_optimized_out (struct value *value, int val);
296
297 /* Like value_optimized_out, but return false if any bit in the object
298 is valid. */
299 extern int value_entirely_optimized_out (const struct value *value);
300
301 /* Set or return field indicating whether a variable is initialized or
302 not, based on debugging information supplied by the compiler.
303 1 = initialized; 0 = uninitialized. */
304 extern int value_initialized (struct value *);
305 extern void set_value_initialized (struct value *, int);
306
307 /* Set COMPONENT's location as appropriate for a component of WHOLE
308 --- regardless of what kind of lvalue WHOLE is. */
309 extern void set_value_component_location (struct value *component,
310 const struct value *whole);
311
312 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
313 single value might have multiple LVALs), this hacked interface is
314 limited to just the first PIECE. Expect further change. */
315 /* Type of value; either not an lval, or one of the various different
316 possible kinds of lval. */
317 extern enum lval_type *deprecated_value_lval_hack (struct value *);
318 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
319
320 /* Like VALUE_LVAL, except the parameter can be const. */
321 extern enum lval_type value_lval_const (const struct value *value);
322
323 /* If lval == lval_memory, return the address in the inferior. If
324 lval == lval_register, return the byte offset into the registers
325 structure. Otherwise, return 0. The returned address
326 includes the offset, if any. */
327 extern CORE_ADDR value_address (const struct value *);
328
329 /* Like value_address, except the result does not include value's
330 offset. */
331 extern CORE_ADDR value_raw_address (struct value *);
332
333 /* Set the address of a value. */
334 extern void set_value_address (struct value *, CORE_ADDR);
335
336 /* Pointer to internal variable. */
337 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
338 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
339
340 /* Frame register value is relative to. This will be described in the
341 lval enum above as "lval_register". */
342 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
343 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
344
345 /* Register number if the value is from a register. */
346 extern short *deprecated_value_regnum_hack (struct value *);
347 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
348
349 /* Return value after lval_funcs->coerce_ref (after check_typedef). Return
350 NULL if lval_funcs->coerce_ref is not applicable for whatever reason. */
351
352 extern struct value *coerce_ref_if_computed (const struct value *arg);
353
354 /* Setup a new value type and enclosing value type for dereferenced value VALUE.
355 ENC_TYPE is the new enclosing type that should be set. ORIGINAL_TYPE and
356 ORIGINAL_VAL are the type and value of the original reference or pointer.
357
358 Note, that VALUE is modified by this function.
359
360 It is a common implementation for coerce_ref and value_ind. */
361
362 extern struct value * readjust_indirect_value_type (struct value *value,
363 struct type *enc_type,
364 struct type *original_type,
365 struct value *original_val);
366
367 /* Convert a REF to the object referenced. */
368
369 extern struct value *coerce_ref (struct value *value);
370
371 /* If ARG is an array, convert it to a pointer.
372 If ARG is a function, convert it to a function pointer.
373
374 References are dereferenced. */
375
376 extern struct value *coerce_array (struct value *value);
377
378 /* Given a value, determine whether the bits starting at OFFSET and
379 extending for LENGTH bits are valid. This returns nonzero if all
380 bits in the given range are valid, zero if any bit is invalid. */
381
382 extern int value_bits_valid (const struct value *value,
383 int offset, int length);
384
385 /* Given a value, determine whether the bits starting at OFFSET and
386 extending for LENGTH bits are a synthetic pointer. */
387
388 extern int value_bits_synthetic_pointer (const struct value *value,
389 int offset, int length);
390
391 /* Given a value, determine whether the contents bytes starting at
392 OFFSET and extending for LENGTH bytes are available. This returns
393 nonzero if all bytes in the given range are available, zero if any
394 byte is unavailable. */
395
396 extern int value_bytes_available (const struct value *value,
397 int offset, int length);
398
399 /* Like value_bytes_available, but return false if any byte in the
400 whole object is unavailable. */
401 extern int value_entirely_available (struct value *value);
402
403 /* Mark VALUE's content bytes starting at OFFSET and extending for
404 LENGTH bytes as unavailable. */
405
406 extern void mark_value_bytes_unavailable (struct value *value,
407 int offset, int length);
408
409 /* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with
410 LENGTH bytes of VAL2's contents starting at OFFSET2.
411
412 Note that "contents" refers to the whole value's contents
413 (value_contents_all), without any embedded offset adjustment. For
414 example, to compare a complete object value with itself, including
415 its enclosing type chunk, you'd do:
416
417 int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val)));
418 value_available_contents (val, 0, val, 0, len);
419
420 Returns true iff the set of available contents match. Unavailable
421 contents compare equal with unavailable contents, and different
422 with any available byte. For example, if 'x's represent an
423 unavailable byte, and 'V' and 'Z' represent different available
424 bytes, in a value with length 16:
425
426 offset: 0 4 8 12 16
427 contents: xxxxVVVVxxxxVVZZ
428
429 then:
430
431 value_available_contents_eq(val, 0, val, 8, 6) => 1
432 value_available_contents_eq(val, 0, val, 4, 4) => 1
433 value_available_contents_eq(val, 0, val, 8, 8) => 0
434 value_available_contents_eq(val, 4, val, 12, 2) => 1
435 value_available_contents_eq(val, 4, val, 12, 4) => 0
436 value_available_contents_eq(val, 3, val, 4, 4) => 0
437 */
438
439 extern int value_available_contents_eq (const struct value *val1, int offset1,
440 const struct value *val2, int offset2,
441 int length);
442
443 /* Read LENGTH bytes of memory starting at MEMADDR into BUFFER, which
444 is (or will be copied to) VAL's contents buffer offset by
445 EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
446 Marks value contents ranges as unavailable if the corresponding
447 memory is likewise unavailable. STACK indicates whether the memory
448 is known to be stack memory. */
449
450 extern void read_value_memory (struct value *val, int embedded_offset,
451 int stack, CORE_ADDR memaddr,
452 gdb_byte *buffer, size_t length);
453
454 \f
455
456 #include "symtab.h"
457 #include "gdbtypes.h"
458 #include "expression.h"
459
460 struct frame_info;
461 struct fn_field;
462
463 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
464 struct ui_file *, int);
465
466 extern LONGEST value_as_long (struct value *val);
467 extern DOUBLEST value_as_double (struct value *val);
468 extern CORE_ADDR value_as_address (struct value *val);
469
470 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
471 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
472 int *invp);
473 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
474
475 extern int unpack_value_bits_as_long (struct type *field_type,
476 const gdb_byte *valaddr,
477 int embedded_offset, int bitpos,
478 int bitsize,
479 const struct value *original_value,
480 LONGEST *result);
481
482 extern LONGEST unpack_field_as_long (struct type *type,
483 const gdb_byte *valaddr,
484 int fieldno);
485 extern int unpack_value_field_as_long (struct type *type, const gdb_byte *valaddr,
486 int embedded_offset, int fieldno,
487 const struct value *val, LONGEST *result);
488
489 extern struct value *value_field_bitfield (struct type *type, int fieldno,
490 const gdb_byte *valaddr,
491 int embedded_offset,
492 const struct value *val);
493
494 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
495
496 extern struct value *value_from_longest (struct type *type, LONGEST num);
497 extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
498 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
499 extern struct value *value_from_double (struct type *type, DOUBLEST num);
500 extern struct value *value_from_decfloat (struct type *type,
501 const gdb_byte *decbytes);
502 extern struct value *value_from_history_ref (char *, char **);
503
504 extern struct value *value_at (struct type *type, CORE_ADDR addr);
505 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
506
507 extern struct value *value_from_contents_and_address (struct type *,
508 const gdb_byte *,
509 CORE_ADDR);
510 extern struct value *value_from_contents (struct type *, const gdb_byte *);
511
512 extern struct value *default_value_from_register (struct type *type,
513 int regnum,
514 struct frame_info *frame);
515
516 extern void read_frame_register_value (struct value *value,
517 struct frame_info *frame);
518
519 extern struct value *value_from_register (struct type *type, int regnum,
520 struct frame_info *frame);
521
522 extern CORE_ADDR address_from_register (struct type *type, int regnum,
523 struct frame_info *frame);
524
525 extern struct value *value_of_variable (struct symbol *var,
526 const struct block *b);
527
528 extern struct value *address_of_variable (struct symbol *var, struct block *b);
529
530 extern struct value *value_of_register (int regnum, struct frame_info *frame);
531
532 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
533
534 extern int symbol_read_needs_frame (struct symbol *);
535
536 extern struct value *read_var_value (struct symbol *var,
537 struct frame_info *frame);
538
539 extern struct value *allocate_value (struct type *type);
540 extern struct value *allocate_value_lazy (struct type *type);
541 extern void allocate_value_contents (struct value *value);
542 extern void value_contents_copy (struct value *dst, int dst_offset,
543 struct value *src, int src_offset,
544 int length);
545 extern void value_contents_copy_raw (struct value *dst, int dst_offset,
546 struct value *src, int src_offset,
547 int length);
548
549 extern struct value *allocate_repeat_value (struct type *type, int count);
550
551 extern struct value *value_mark (void);
552
553 extern void value_free_to_mark (struct value *mark);
554
555 extern struct value *value_cstring (char *ptr, int len,
556 struct type *char_type);
557 extern struct value *value_string (char *ptr, int len,
558 struct type *char_type);
559 extern struct value *value_bitstring (char *ptr, int len,
560 struct type *index_type);
561
562 extern struct value *value_array (int lowbound, int highbound,
563 struct value **elemvec);
564
565 extern struct value *value_concat (struct value *arg1, struct value *arg2);
566
567 extern struct value *value_binop (struct value *arg1, struct value *arg2,
568 enum exp_opcode op);
569
570 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
571
572 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
573
574 extern int value_must_coerce_to_target (struct value *arg1);
575
576 extern struct value *value_coerce_to_target (struct value *arg1);
577
578 extern struct value *value_coerce_array (struct value *arg1);
579
580 extern struct value *value_coerce_function (struct value *arg1);
581
582 extern struct value *value_ind (struct value *arg1);
583
584 extern struct value *value_addr (struct value *arg1);
585
586 extern struct value *value_ref (struct value *arg1);
587
588 extern struct value *value_assign (struct value *toval,
589 struct value *fromval);
590
591 extern struct value *value_pos (struct value *arg1);
592
593 extern struct value *value_neg (struct value *arg1);
594
595 extern struct value *value_complement (struct value *arg1);
596
597 extern struct value *value_struct_elt (struct value **argp,
598 struct value **args,
599 const char *name, int *static_memfuncp,
600 const char *err);
601
602 extern struct value *value_aggregate_elt (struct type *curtype,
603 char *name,
604 struct type *expect_type,
605 int want_address,
606 enum noside noside);
607
608 extern struct value *value_static_field (struct type *type, int fieldno);
609
610 extern struct fn_field *value_find_oload_method_list (struct value **,
611 const char *,
612 int, int *,
613 struct type **, int *);
614
615 enum oload_search_type { NON_METHOD, METHOD, BOTH };
616
617 extern int find_overload_match (struct value **args, int nargs,
618 const char *name,
619 enum oload_search_type method, int lax,
620 struct value **objp, struct symbol *fsym,
621 struct value **valp, struct symbol **symp,
622 int *staticp, const int no_adl);
623
624 extern struct value *value_field (struct value *arg1, int fieldno);
625
626 extern struct value *value_primitive_field (struct value *arg1, int offset,
627 int fieldno,
628 struct type *arg_type);
629
630
631 extern struct type *value_rtti_indirect_type (struct value *, int *, int *,
632 int *);
633
634 extern struct value *value_full_object (struct value *, struct type *, int,
635 int, int);
636
637 extern struct value *value_cast_pointers (struct type *, struct value *);
638
639 extern struct value *value_cast (struct type *type, struct value *arg2);
640
641 extern struct value *value_reinterpret_cast (struct type *type,
642 struct value *arg);
643
644 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
645
646 extern struct value *value_zero (struct type *type, enum lval_type lv);
647
648 extern struct value *value_one (struct type *type);
649
650 extern struct value *value_repeat (struct value *arg1, int count);
651
652 extern struct value *value_subscript (struct value *array, LONGEST index);
653
654 extern struct value *value_bitstring_subscript (struct type *type,
655 struct value *bitstring,
656 LONGEST index);
657
658 extern struct value *register_value_being_returned (struct type *valtype,
659 struct regcache *retbuf);
660
661 extern int value_in (struct value *element, struct value *set);
662
663 extern int value_bit_index (struct type *type, const gdb_byte *addr,
664 int index);
665
666 extern int using_struct_return (struct gdbarch *gdbarch,
667 struct type *func_type,
668 struct type *value_type);
669
670 extern struct value *evaluate_expression (struct expression *exp);
671
672 extern struct value *evaluate_type (struct expression *exp);
673
674 extern struct value *evaluate_subexp (struct type *expect_type,
675 struct expression *exp,
676 int *pos, enum noside noside);
677
678 extern struct value *evaluate_subexpression_type (struct expression *exp,
679 int subexp);
680
681 extern void fetch_subexp_value (struct expression *exp, int *pc,
682 struct value **valp, struct value **resultp,
683 struct value **val_chain);
684
685 extern char *extract_field_op (struct expression *exp, int *subexp);
686
687 extern struct value *evaluate_subexp_with_coercion (struct expression *,
688 int *, enum noside);
689
690 extern struct value *parse_and_eval (char *exp);
691
692 extern struct value *parse_to_comma_and_eval (char **expp);
693
694 extern struct type *parse_and_eval_type (char *p, int length);
695
696 extern CORE_ADDR parse_and_eval_address (char *exp);
697
698 extern LONGEST parse_and_eval_long (char *exp);
699
700 extern void unop_promote (const struct language_defn *language,
701 struct gdbarch *gdbarch,
702 struct value **arg1);
703
704 extern void binop_promote (const struct language_defn *language,
705 struct gdbarch *gdbarch,
706 struct value **arg1, struct value **arg2);
707
708 extern struct value *access_value_history (int num);
709
710 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
711 struct internalvar *var);
712
713 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
714
715 extern void set_internalvar (struct internalvar *var, struct value *val);
716
717 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
718
719 extern void set_internalvar_string (struct internalvar *var,
720 const char *string);
721
722 extern void clear_internalvar (struct internalvar *var);
723
724 extern void set_internalvar_component (struct internalvar *var,
725 int offset,
726 int bitpos, int bitsize,
727 struct value *newvalue);
728
729 extern struct internalvar *lookup_only_internalvar (const char *name);
730
731 extern struct internalvar *create_internalvar (const char *name);
732
733 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
734 struct internalvar *);
735 extern struct internalvar *
736 create_internalvar_type_lazy (char *name, internalvar_make_value fun);
737
738 extern struct internalvar *lookup_internalvar (const char *name);
739
740 extern int value_equal (struct value *arg1, struct value *arg2);
741
742 extern int value_equal_contents (struct value *arg1, struct value *arg2);
743
744 extern int value_less (struct value *arg1, struct value *arg2);
745
746 extern int value_logical_not (struct value *arg1);
747
748 /* C++ */
749
750 extern struct value *value_of_this (const struct language_defn *lang);
751
752 extern struct value *value_of_this_silent (const struct language_defn *lang);
753
754 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
755 enum exp_opcode op,
756 enum exp_opcode otherop,
757 enum noside noside);
758
759 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
760 enum noside noside);
761
762 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
763 int j, struct type *type, int offset);
764
765 extern int binop_types_user_defined_p (enum exp_opcode op,
766 struct type *type1,
767 struct type *type2);
768
769 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
770 struct value *arg2);
771
772 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
773
774 extern int destructor_name_p (const char *name, struct type *type);
775
776 extern void value_incref (struct value *val);
777
778 extern void value_free (struct value *val);
779
780 extern void free_all_values (void);
781
782 extern void free_value_chain (struct value *v);
783
784 extern void release_value (struct value *val);
785
786 extern void release_value_or_incref (struct value *val);
787
788 extern int record_latest_value (struct value *val);
789
790 extern void modify_field (struct type *type, gdb_byte *addr,
791 LONGEST fieldval, int bitpos, int bitsize);
792
793 extern void type_print (struct type *type, const char *varstring,
794 struct ui_file *stream, int show);
795
796 extern char *type_to_string (struct type *type);
797
798 extern gdb_byte *baseclass_addr (struct type *type, int index,
799 gdb_byte *valaddr,
800 struct value **valuep, int *errp);
801
802 extern void print_longest (struct ui_file *stream, int format,
803 int use_local, LONGEST val);
804
805 extern void print_floating (const gdb_byte *valaddr, struct type *type,
806 struct ui_file *stream);
807
808 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
809 struct ui_file *stream);
810
811 extern void value_print (struct value *val, struct ui_file *stream,
812 const struct value_print_options *options);
813
814 extern void value_print_array_elements (struct value *val,
815 struct ui_file *stream, int format,
816 enum val_prettyprint pretty);
817
818 extern struct value *value_release_to_mark (struct value *mark);
819
820 extern int val_print (struct type *type, const gdb_byte *valaddr,
821 int embedded_offset, CORE_ADDR address,
822 struct ui_file *stream, int recurse,
823 const struct value *val,
824 const struct value_print_options *options,
825 const struct language_defn *language);
826
827 extern void common_val_print (struct value *val,
828 struct ui_file *stream, int recurse,
829 const struct value_print_options *options,
830 const struct language_defn *language);
831
832 extern int val_print_string (struct type *elttype, const char *encoding,
833 CORE_ADDR addr, int len,
834 struct ui_file *stream,
835 const struct value_print_options *options);
836
837 extern void print_variable_and_value (const char *name,
838 struct symbol *var,
839 struct frame_info *frame,
840 struct ui_file *stream,
841 int indent);
842
843 extern int check_field (struct type *, const char *);
844
845 extern void typedef_print (struct type *type, struct symbol *news,
846 struct ui_file *stream);
847
848 extern char *internalvar_name (struct internalvar *var);
849
850 extern void preserve_values (struct objfile *);
851
852 /* From values.c */
853
854 extern struct value *value_copy (struct value *);
855
856 extern struct value *value_non_lval (struct value *);
857
858 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
859
860 /* From valops.c */
861
862 extern struct value *varying_to_slice (struct value *);
863
864 extern struct value *value_slice (struct value *, int, int);
865
866 extern struct value *value_literal_complex (struct value *, struct value *,
867 struct type *);
868
869 extern struct value *find_function_in_inferior (const char *,
870 struct objfile **);
871
872 extern struct value *value_allocate_space_in_inferior (int);
873
874 extern struct value *value_subscripted_rvalue (struct value *array,
875 LONGEST index, int lowerbound);
876
877 /* User function handler. */
878
879 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
880 const struct language_defn *language,
881 void *cookie,
882 int argc,
883 struct value **argv);
884
885 void add_internal_function (const char *name, const char *doc,
886 internal_function_fn handler,
887 void *cookie);
888
889 struct value *call_internal_function (struct gdbarch *gdbarch,
890 const struct language_defn *language,
891 struct value *function,
892 int argc, struct value **argv);
893
894 char *value_internal_function_name (struct value *);
895
896 #endif /* !defined (VALUE_H) */