gdb/value.h

   1 /* Definitions for values of C expressions, for GDB.
   2
   3    Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
   4    1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   5    2008, 2009 Free Software Foundation, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #if !defined (VALUE_H)
  23 #define VALUE_H 1
  24
  25 #include "doublest.h"
  26 #include "frame.h"              /* For struct frame_id.  */
  27
  28 struct block;
  29 struct expression;
  30 struct regcache;
  31 struct symbol;
  32 struct type;
  33 struct ui_file;
  34 struct language_defn;
  35 struct value_print_options;
  36
  37 /* The structure which defines the type of a value.  It should never
  38    be possible for a program lval value to survive over a call to the
  39    inferior (i.e. to be put into the history list or an internal
  40    variable).  */
  41
  42 struct value;
  43
  44 /* Values are stored in a chain, so that they can be deleted easily
  45    over calls to the inferior.  Values assigned to internal variables,
  46    put into the value history or exposed to Python are taken off this
  47    list.  */
  48
  49 struct value *value_next (struct value *);
  50
  51 /* Type of the value.  */
  52
  53 extern struct type *value_type (struct value *);
  54
  55 /* This is being used to change the type of an existing value, that
  56    code should instead be creating a new value with the changed type
  57    (but possibly shared content).  */
  58
  59 extern void deprecated_set_value_type (struct value *value,
  60                                        struct type *type);
  61
  62 /* Only used for bitfields; number of bits contained in them.  */
  63
  64 extern int value_bitsize (struct value *);
  65 extern void set_value_bitsize (struct value *, int bit);
  66
  67 /* Only used for bitfields; position of start of field.  For
  68    gdbarch_bits_big_endian=0 targets, it is the position of the LSB.  For
  69    gdbarch_bits_big_endian=1 targets, it is the position of the MSB.  */
  70
  71 extern int value_bitpos (struct value *);
  72 extern void set_value_bitpos (struct value *, int bit);
  73
  74 /* Only used for bitfields; the containing value.  This allows a
  75    single read from the target when displaying multiple
  76    bitfields.  */
  77
  78 struct value *value_parent (struct value *);
  79
  80 /* Describes offset of a value within lval of a structure in bytes.
  81    If lval == lval_memory, this is an offset to the address.  If lval
  82    == lval_register, this is a further offset from location.address
  83    within the registers structure.  Note also the member
  84    embedded_offset below.  */
  85
  86 extern int value_offset (struct value *);
  87 extern void set_value_offset (struct value *, int offset);
  88
  89 /* The comment from "struct value" reads: ``Is it modifiable?  Only
  90    relevant if lval != not_lval.''.  Shouldn't the value instead be
  91    not_lval and be done with it?  */
  92
  93 extern int deprecated_value_modifiable (struct value *value);
  94 extern void deprecated_set_value_modifiable (struct value *value,
  95                                              int modifiable);
  96
  97 /* If a value represents a C++ object, then the `type' field gives the
  98    object's compile-time type.  If the object actually belongs to some
  99    class derived from `type', perhaps with other base classes and
 100    additional members, then `type' is just a subobject of the real
 101    thing, and the full object is probably larger than `type' would
 102    suggest.
 103
 104    If `type' is a dynamic class (i.e. one with a vtable), then GDB can
 105    actually determine the object's run-time type by looking at the
 106    run-time type information in the vtable.  When this information is
 107    available, we may elect to read in the entire object, for several
 108    reasons:
 109
 110    - When printing the value, the user would probably rather see the
 111      full object, not just the limited portion apparent from the
 112      compile-time type.
 113
 114    - If `type' has virtual base classes, then even printing `type'
 115      alone may require reaching outside the `type' portion of the
 116      object to wherever the virtual base class has been stored.
 117
 118    When we store the entire object, `enclosing_type' is the run-time
 119    type -- the complete object -- and `embedded_offset' is the offset
 120    of `type' within that larger type, in bytes.  The value_contents()
 121    macro takes `embedded_offset' into account, so most GDB code
 122    continues to see the `type' portion of the value, just as the
 123    inferior would.
 124
 125    If `type' is a pointer to an object, then `enclosing_type' is a
 126    pointer to the object's run-time type, and `pointed_to_offset' is
 127    the offset in bytes from the full object to the pointed-to object
 128    -- that is, the value `embedded_offset' would have if we followed
 129    the pointer and fetched the complete object.  (I don't really see
 130    the point.  Why not just determine the run-time type when you
 131    indirect, and avoid the special case?  The contents don't matter
 132    until you indirect anyway.)
 133
 134    If we're not doing anything fancy, `enclosing_type' is equal to
 135    `type', and `embedded_offset' is zero, so everything works
 136    normally.  */
 137
 138 extern struct type *value_enclosing_type (struct value *);
 139 extern struct value *value_change_enclosing_type (struct value *val,
 140                                                   struct type *new_type);
 141 extern int value_pointed_to_offset (struct value *value);
 142 extern void set_value_pointed_to_offset (struct value *value, int val);
 143 extern int value_embedded_offset (struct value *value);
 144 extern void set_value_embedded_offset (struct value *value, int val);
 145
 146 /* For lval_computed values, this structure holds functions used to
 147    retrieve and set the value (or portions of the value).
 148
 149    For each function, 'V' is the 'this' pointer: an lval_funcs
 150    function F may always assume that the V it receives is an
 151    lval_computed value, and has F in the appropriate slot of its
 152    lval_funcs structure.  */
 153
 154 struct lval_funcs
 155 {
 156   /* Fill in VALUE's contents.  This is used to "un-lazy" values.  If
 157      a problem arises in obtaining VALUE's bits, this function should
 158      call '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'.  */
 165   void (*write) (struct value *toval, struct value *fromval);
 166
 167   /* Return a duplicate of VALUE's closure, for use in a new value.
 168      This may simply return the same closure, if VALUE's is
 169      reference-counted or statically allocated.
 170
 171      This may be NULL, in which case VALUE's closure is re-used in the
 172      new value.  */
 173   void *(*copy_closure) (struct value *v);
 174
 175   /* Drop VALUE's reference to its closure.  Maybe this frees the
 176      closure; maybe this decrements a reference count; maybe the
 177      closure is statically allocated and this does nothing.
 178
 179      This may be NULL, in which case no action is taken to free
 180      VALUE's closure.  */
 181   void (*free_closure) (struct value *v);
 182 };
 183
 184 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
 185    and closure CLOSURE.  */
 186
 187 extern struct value *allocate_computed_value (struct type *type,
 188                                               struct lval_funcs *funcs,
 189                                               void *closure);
 190
 191 /* If VALUE is lval_computed, return its lval_funcs structure.  */
 192
 193 extern struct lval_funcs *value_computed_funcs (struct value *value);
 194
 195 /* If VALUE is lval_computed, return its closure.  The meaning of the
 196    returned value depends on the functions VALUE uses.  */
 197
 198 extern void *value_computed_closure (struct value *value);
 199
 200 /* If zero, contents of this value are in the contents field.  If
 201    nonzero, contents are in inferior.  If the lval field is lval_memory,
 202    the contents are in inferior memory at location.address plus offset.
 203    The lval field may also be lval_register.
 204
 205    WARNING: This field is used by the code which handles watchpoints
 206    (see breakpoint.c) to decide whether a particular value can be
 207    watched by hardware watchpoints.  If the lazy flag is set for some
 208    member of a value chain, it is assumed that this member of the
 209    chain doesn't need to be watched as part of watching the value
 210    itself.  This is how GDB avoids watching the entire struct or array
 211    when the user wants to watch a single struct member or array
 212    element.  If you ever change the way lazy flag is set and reset, be
 213    sure to consider this use as well!  */
 214
 215 extern int value_lazy (struct value *);
 216 extern void set_value_lazy (struct value *value, int val);
 217
 218 extern int value_stack (struct value *);
 219 extern void set_value_stack (struct value *value, int val);
 220
 221 /* value_contents() and value_contents_raw() both return the address
 222    of the gdb buffer used to hold a copy of the contents of the lval.
 223    value_contents() is used when the contents of the buffer are needed
 224    -- it uses value_fetch_lazy() to load the buffer from the process
 225    being debugged if it hasn't already been loaded
 226    (value_contents_writeable() is used when a writeable but fetched
 227    buffer is required)..  value_contents_raw() is used when data is
 228    being stored into the buffer, or when it is certain that the
 229    contents of the buffer are valid.
 230
 231    Note: The contents pointer is adjusted by the offset required to
 232    get to the real subobject, if the value happens to represent
 233    something embedded in a larger run-time object.  */
 234
 235 extern gdb_byte *value_contents_raw (struct value *);
 236
 237 /* Actual contents of the value.  For use of this value; setting it
 238    uses the stuff above.  Not valid if lazy is nonzero.  Target
 239    byte-order.  We force it to be aligned properly for any possible
 240    value.  Note that a value therefore extends beyond what is
 241    declared here.  */
 242
 243 extern const gdb_byte *value_contents (struct value *);
 244 extern gdb_byte *value_contents_writeable (struct value *);
 245
 246 /* The ALL variants of the above two macros do not adjust the returned
 247    pointer by the embedded_offset value.  */
 248
 249 extern gdb_byte *value_contents_all_raw (struct value *);
 250 extern const gdb_byte *value_contents_all (struct value *);
 251
 252 extern int value_fetch_lazy (struct value *val);
 253 extern int value_contents_equal (struct value *val1, struct value *val2);
 254
 255 /* If nonzero, this is the value of a variable which does not actually
 256    exist in the program.  */
 257 extern int value_optimized_out (struct value *value);
 258 extern void set_value_optimized_out (struct value *value, int val);
 259
 260 /* Set or return field indicating whether a variable is initialized or
 261    not, based on debugging information supplied by the compiler.
 262    1 = initialized; 0 = uninitialized.  */
 263 extern int value_initialized (struct value *);
 264 extern void set_value_initialized (struct value *, int);
 265
 266 /* Set COMPONENT's location as appropriate for a component of WHOLE
 267    --- regardless of what kind of lvalue WHOLE is.  */
 268 extern void set_value_component_location (struct value *component,
 269                                           struct value *whole);
 270
 271 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 272    single value might have multiple LVALs), this hacked interface is
 273    limited to just the first PIECE.  Expect further change.  */
 274 /* Type of value; either not an lval, or one of the various different
 275    possible kinds of lval.  */
 276 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 277 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 278
 279 /* If lval == lval_memory, return the address in the inferior.  If
 280    lval == lval_register, return the byte offset into the registers
 281    structure.  Otherwise, return 0.  The returned address
 282    includes the offset, if any.  */
 283 extern CORE_ADDR value_address (struct value *);
 284
 285 /* Like value_address, except the result does not include value's
 286    offset.  */
 287 extern CORE_ADDR value_raw_address (struct value *);
 288
 289 /* Set the address of a value.  */
 290 extern void set_value_address (struct value *, CORE_ADDR);
 291
 292 /* Pointer to internal variable.  */
 293 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 294 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 295
 296 /* Frame register value is relative to.  This will be described in the
 297    lval enum above as "lval_register".  */
 298 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 299 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 300
 301 /* Register number if the value is from a register.  */
 302 extern short *deprecated_value_regnum_hack (struct value *);
 303 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 304
 305 /* Convert a REF to the object referenced.  */
 306
 307 extern struct value *coerce_ref (struct value *value);
 308
 309 /* If ARG is an array, convert it to a pointer.
 310    If ARG is a function, convert it to a function pointer.
 311
 312    References are dereferenced.  */
 313
 314 extern struct value *coerce_array (struct value *value);
 315
 316 \f
 317
 318 #include "symtab.h"
 319 #include "gdbtypes.h"
 320 #include "expression.h"
 321
 322 struct frame_info;
 323 struct fn_field;
 324
 325 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
 326                                     struct ui_file *, int);
 327
 328 extern LONGEST value_as_long (struct value *val);
 329 extern DOUBLEST value_as_double (struct value *val);
 330 extern CORE_ADDR value_as_address (struct value *val);
 331
 332 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 333 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 334                                int *invp);
 335 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 336 LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
 337                              int bitpos, int bitsize);
 338 extern LONGEST unpack_field_as_long (struct type *type,
 339                                      const gdb_byte *valaddr,
 340                                      int fieldno);
 341
 342 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 343
 344 extern struct value *value_from_longest (struct type *type, LONGEST num);
 345 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 346 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 347 extern struct value *value_from_decfloat (struct type *type,
 348                                           const gdb_byte *decbytes);
 349
 350 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 351 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 352
 353 extern struct value *value_from_contents_and_address (struct type *,
 354                                                       const gdb_byte *,
 355                                                       CORE_ADDR);
 356
 357 extern struct value *default_value_from_register (struct type *type,
 358                                                   int regnum,
 359                                                   struct frame_info *frame);
 360
 361 extern struct value *value_from_register (struct type *type, int regnum,
 362                                           struct frame_info *frame);
 363
 364 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 365                                         struct frame_info *frame);
 366
 367 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 368
 369 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 370
 371 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 372
 373 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 374
 375 extern int symbol_read_needs_frame (struct symbol *);
 376
 377 extern struct value *read_var_value (struct symbol *var,
 378                                      struct frame_info *frame);
 379
 380 extern struct value *allocate_value (struct type *type);
 381 extern struct value *allocate_value_lazy (struct type *type);
 382 extern void allocate_value_contents (struct value *value);
 383
 384 extern struct value *allocate_repeat_value (struct type *type, int count);
 385
 386 extern struct value *value_mark (void);
 387
 388 extern void value_free_to_mark (struct value *mark);
 389
 390 extern struct value *value_cstring (char *ptr, int len,
 391                                     struct type *char_type);
 392 extern struct value *value_string (char *ptr, int len,
 393                                    struct type *char_type);
 394 extern struct value *value_bitstring (char *ptr, int len,
 395                                       struct type *index_type);
 396
 397 extern struct value *value_array (int lowbound, int highbound,
 398                                   struct value **elemvec);
 399
 400 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 401
 402 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 403                                   enum exp_opcode op);
 404
 405 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 406
 407 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 408
 409 extern int value_must_coerce_to_target (struct value *arg1);
 410
 411 extern struct value *value_coerce_to_target (struct value *arg1);
 412
 413 extern struct value *value_coerce_array (struct value *arg1);
 414
 415 extern struct value *value_coerce_function (struct value *arg1);
 416
 417 extern struct value *value_ind (struct value *arg1);
 418
 419 extern struct value *value_addr (struct value *arg1);
 420
 421 extern struct value *value_ref (struct value *arg1);
 422
 423 extern struct value *value_assign (struct value *toval,
 424                                    struct value *fromval);
 425
 426 extern struct value *value_pos (struct value *arg1);
 427
 428 extern struct value *value_neg (struct value *arg1);
 429
 430 extern struct value *value_complement (struct value *arg1);
 431
 432 extern struct value *value_struct_elt (struct value **argp,
 433                                        struct value **args,
 434                                        char *name, int *static_memfuncp,
 435                                        char *err);
 436
 437 extern struct value *value_aggregate_elt (struct type *curtype,
 438                                           char *name,
 439                                           struct type *expect_type,
 440                                           int want_address,
 441                                           enum noside noside);
 442
 443 extern struct value *value_static_field (struct type *type, int fieldno);
 444
 445 extern struct fn_field *value_find_oload_method_list (struct value **, char *,
 446                                                       int, int *,
 447                                                       struct type **, int *);
 448
 449 extern int find_overload_match (struct type **arg_types, int nargs,
 450                                 char *name, int method, int lax,
 451                                 struct value **objp, struct symbol *fsym,
 452                                 struct value **valp, struct symbol **symp,
 453                                 int *staticp);
 454
 455 extern struct value *value_field (struct value *arg1, int fieldno);
 456
 457 extern struct value *value_primitive_field (struct value *arg1, int offset,
 458                                             int fieldno,
 459                                             struct type *arg_type);
 460
 461
 462 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 463                                             int *);
 464
 465 extern struct value *value_full_object (struct value *, struct type *, int,
 466                                         int, int);
 467
 468 extern struct value *value_cast_pointers (struct type *, struct value *);
 469
 470 extern struct value *value_cast (struct type *type, struct value *arg2);
 471
 472 extern struct value *value_zero (struct type *type, enum lval_type lv);
 473
 474 extern struct value *value_one (struct type *type, enum lval_type lv);
 475
 476 extern struct value *value_repeat (struct value *arg1, int count);
 477
 478 extern struct value *value_subscript (struct value *array, LONGEST index);
 479
 480 extern struct value *value_bitstring_subscript (struct type *type,
 481                                                 struct value *bitstring,
 482                                                 LONGEST index);
 483
 484 extern struct value *register_value_being_returned (struct type *valtype,
 485                                                     struct regcache *retbuf);
 486
 487 extern int value_in (struct value *element, struct value *set);
 488
 489 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 490                             int index);
 491
 492 extern int using_struct_return (struct gdbarch *gdbarch,
 493                                 struct type *func_type,
 494                                 struct type *value_type);
 495
 496 extern struct value *evaluate_expression (struct expression *exp);
 497
 498 extern struct value *evaluate_type (struct expression *exp);
 499
 500 extern struct value *evaluate_subexp (struct type *expect_type,
 501                                       struct expression *exp,
 502                                       int *pos, enum noside noside);
 503
 504 extern struct value *evaluate_subexpression_type (struct expression *exp,
 505                                                   int subexp);
 506
 507 extern char *extract_field_op (struct expression *exp, int *subexp);
 508
 509 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 510                                                     int *, enum noside);
 511
 512 extern struct value *parse_and_eval (char *exp);
 513
 514 extern struct value *parse_to_comma_and_eval (char **expp);
 515
 516 extern struct type *parse_and_eval_type (char *p, int length);
 517
 518 extern CORE_ADDR parse_and_eval_address (char *exp);
 519
 520 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 521
 522 extern LONGEST parse_and_eval_long (char *exp);
 523
 524 extern void unop_promote (const struct language_defn *language,
 525                           struct gdbarch *gdbarch,
 526                           struct value **arg1);
 527
 528 extern void binop_promote (const struct language_defn *language,
 529                            struct gdbarch *gdbarch,
 530                            struct value **arg1, struct value **arg2);
 531
 532 extern struct value *access_value_history (int num);
 533
 534 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 535                                            struct internalvar *var);
 536
 537 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 538
 539 extern void set_internalvar (struct internalvar *var, struct value *val);
 540
 541 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 542
 543 extern void set_internalvar_string (struct internalvar *var,
 544                                     const char *string);
 545
 546 extern void clear_internalvar (struct internalvar *var);
 547
 548 extern void set_internalvar_component (struct internalvar *var,
 549                                        int offset,
 550                                        int bitpos, int bitsize,
 551                                        struct value *newvalue);
 552
 553 extern struct internalvar *lookup_only_internalvar (const char *name);
 554
 555 extern struct internalvar *create_internalvar (const char *name);
 556
 557 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 558                                                   struct internalvar *);
 559 extern struct internalvar *
 560   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 561
 562 extern struct internalvar *lookup_internalvar (const char *name);
 563
 564 extern int value_equal (struct value *arg1, struct value *arg2);
 565
 566 extern int value_less (struct value *arg1, struct value *arg2);
 567
 568 extern int value_logical_not (struct value *arg1);
 569
 570 /* C++ */
 571
 572 extern struct value *value_of_this (int complain);
 573
 574 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 575                                     enum exp_opcode op,
 576                                     enum exp_opcode otherop,
 577                                     enum noside noside);
 578
 579 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 580                                    enum noside noside);
 581
 582 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 583                                      int j, struct type *type, int offset);
 584
 585 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 586                                  struct value *arg2);
 587
 588 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 589
 590 extern int destructor_name_p (const char *name, const struct type *type);
 591
 592 extern void value_incref (struct value *val);
 593
 594 extern void value_free (struct value *val);
 595
 596 extern void free_all_values (void);
 597
 598 extern void release_value (struct value *val);
 599
 600 extern int record_latest_value (struct value *val);
 601
 602 extern void modify_field (struct type *type, gdb_byte *addr,
 603                           LONGEST fieldval, int bitpos, int bitsize);
 604
 605 extern void type_print (struct type *type, char *varstring,
 606                         struct ui_file *stream, int show);
 607
 608 extern char *type_to_string (struct type *type);
 609
 610 extern gdb_byte *baseclass_addr (struct type *type, int index,
 611                                  gdb_byte *valaddr,
 612                                  struct value **valuep, int *errp);
 613
 614 extern void print_longest (struct ui_file *stream, int format,
 615                            int use_local, LONGEST val);
 616
 617 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 618                             struct ui_file *stream);
 619
 620 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 621                                     struct ui_file *stream);
 622
 623 extern int value_print (struct value *val, struct ui_file *stream,
 624                         const struct value_print_options *options);
 625
 626 extern void value_print_array_elements (struct value *val,
 627                                         struct ui_file *stream, int format,
 628                                         enum val_prettyprint pretty);
 629
 630 extern struct value *value_release_to_mark (struct value *mark);
 631
 632 extern int val_print (struct type *type, const gdb_byte *valaddr,
 633                       int embedded_offset, CORE_ADDR address,
 634                       struct ui_file *stream, int recurse,
 635                       const struct value_print_options *options,
 636                       const struct language_defn *language);
 637
 638 extern int common_val_print (struct value *val,
 639                              struct ui_file *stream, int recurse,
 640                              const struct value_print_options *options,
 641                              const struct language_defn *language);
 642
 643 extern int val_print_string (struct type *elttype, CORE_ADDR addr, int len,
 644                              struct ui_file *stream,
 645                              const struct value_print_options *options);
 646
 647 extern void print_variable_and_value (const char *name,
 648                                       struct symbol *var,
 649                                       struct frame_info *frame,
 650                                       struct ui_file *stream,
 651                                       int indent);
 652
 653 extern int check_field (struct type *, const char *);
 654
 655 extern void typedef_print (struct type *type, struct symbol *news,
 656                            struct ui_file *stream);
 657
 658 extern char *internalvar_name (struct internalvar *var);
 659
 660 extern void preserve_values (struct objfile *);
 661
 662 /* From values.c */
 663
 664 extern struct value *value_copy (struct value *);
 665
 666 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
 667
 668 /* From valops.c */
 669
 670 extern struct value *varying_to_slice (struct value *);
 671
 672 extern struct value *value_slice (struct value *, int, int);
 673
 674 extern struct value *value_literal_complex (struct value *, struct value *,
 675                                             struct type *);
 676
 677 extern struct value *find_function_in_inferior (const char *,
 678                                                 struct objfile **);
 679
 680 extern struct value *value_allocate_space_in_inferior (int);
 681
 682 extern struct value *value_of_local (const char *name, int complain);
 683
 684 extern struct value *value_subscripted_rvalue (struct value *array,
 685                                                LONGEST index, int lowerbound);
 686
 687 /* User function handler.  */
 688
 689 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
 690                                                const struct language_defn *language,
 691                                                void *cookie,
 692                                                int argc,
 693                                                struct value **argv);
 694
 695 void add_internal_function (const char *name, const char *doc,
 696                             internal_function_fn handler,
 697                             void *cookie);
 698
 699 struct value *call_internal_function (struct gdbarch *gdbarch,
 700                                       const struct language_defn *language,
 701                                       struct value *function,
 702                                       int argc, struct value **argv);
 703
 704 char *value_internal_function_name (struct value *);
 705
 706 #endif /* !defined (VALUE_H) */