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 /* value_contents() and value_contents_raw() both return the address
 219    of the gdb buffer used to hold a copy of the contents of the lval.
 220    value_contents() is used when the contents of the buffer are needed
 221    -- it uses value_fetch_lazy() to load the buffer from the process
 222    being debugged if it hasn't already been loaded
 223    (value_contents_writeable() is used when a writeable but fetched
 224    buffer is required)..  value_contents_raw() is used when data is
 225    being stored into the buffer, or when it is certain that the
 226    contents of the buffer are valid.
 227
 228    Note: The contents pointer is adjusted by the offset required to
 229    get to the real subobject, if the value happens to represent
 230    something embedded in a larger run-time object.  */
 231
 232 extern gdb_byte *value_contents_raw (struct value *);
 233
 234 /* Actual contents of the value.  For use of this value; setting it
 235    uses the stuff above.  Not valid if lazy is nonzero.  Target
 236    byte-order.  We force it to be aligned properly for any possible
 237    value.  Note that a value therefore extends beyond what is
 238    declared here.  */
 239
 240 extern const gdb_byte *value_contents (struct value *);
 241 extern gdb_byte *value_contents_writeable (struct value *);
 242
 243 /* The ALL variants of the above two macros do not adjust the returned
 244    pointer by the embedded_offset value.  */
 245
 246 extern gdb_byte *value_contents_all_raw (struct value *);
 247 extern const gdb_byte *value_contents_all (struct value *);
 248
 249 extern int value_fetch_lazy (struct value *val);
 250 extern int value_contents_equal (struct value *val1, struct value *val2);
 251
 252 /* If nonzero, this is the value of a variable which does not actually
 253    exist in the program.  */
 254 extern int value_optimized_out (struct value *value);
 255 extern void set_value_optimized_out (struct value *value, int val);
 256
 257 /* Set or return field indicating whether a variable is initialized or
 258    not, based on debugging information supplied by the compiler.
 259    1 = initialized; 0 = uninitialized.  */
 260 extern int value_initialized (struct value *);
 261 extern void set_value_initialized (struct value *, int);
 262
 263 /* Set COMPONENT's location as appropriate for a component of WHOLE
 264    --- regardless of what kind of lvalue WHOLE is.  */
 265 extern void set_value_component_location (struct value *component,
 266                                           struct value *whole);
 267
 268 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 269    single value might have multiple LVALs), this hacked interface is
 270    limited to just the first PIECE.  Expect further change.  */
 271 /* Type of value; either not an lval, or one of the various different
 272    possible kinds of lval.  */
 273 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 274 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 275
 276 /* If lval == lval_memory, return the address in the inferior.  If
 277    lval == lval_register, return the byte offset into the registers
 278    structure.  Otherwise, return 0.  The returned address
 279    includes the offset, if any.  */
 280 extern CORE_ADDR value_address (struct value *);
 281
 282 /* Like value_address, except the result does not include value's
 283    offset.  */
 284 extern CORE_ADDR value_raw_address (struct value *);
 285
 286 /* Set the address of a value.  */
 287 extern void set_value_address (struct value *, CORE_ADDR);
 288
 289 /* Pointer to internal variable.  */
 290 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 291 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 292
 293 /* Frame register value is relative to.  This will be described in the
 294    lval enum above as "lval_register".  */
 295 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 296 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 297
 298 /* Register number if the value is from a register.  */
 299 extern short *deprecated_value_regnum_hack (struct value *);
 300 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 301
 302 /* Convert a REF to the object referenced.  */
 303
 304 extern struct value *coerce_ref (struct value *value);
 305
 306 /* If ARG is an array, convert it to a pointer.
 307    If ARG is a function, convert it to a function pointer.
 308
 309    References are dereferenced.  */
 310
 311 extern struct value *coerce_array (struct value *value);
 312
 313 \f
 314
 315 #include "symtab.h"
 316 #include "gdbtypes.h"
 317 #include "expression.h"
 318
 319 struct frame_info;
 320 struct fn_field;
 321
 322 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
 323                                     struct ui_file *, int);
 324
 325 extern LONGEST value_as_long (struct value *val);
 326 extern DOUBLEST value_as_double (struct value *val);
 327 extern CORE_ADDR value_as_address (struct value *val);
 328
 329 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 330 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 331                                int *invp);
 332 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 333 LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
 334                              int bitpos, int bitsize);
 335 extern LONGEST unpack_field_as_long (struct type *type,
 336                                      const gdb_byte *valaddr,
 337                                      int fieldno);
 338
 339 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 340
 341 extern struct value *value_from_longest (struct type *type, LONGEST num);
 342 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 343 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 344 extern struct value *value_from_decfloat (struct type *type,
 345                                           const gdb_byte *decbytes);
 346
 347 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 348 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 349
 350 extern struct value *value_from_contents_and_address (struct type *,
 351                                                       const gdb_byte *,
 352                                                       CORE_ADDR);
 353
 354 extern struct value *default_value_from_register (struct type *type,
 355                                                   int regnum,
 356                                                   struct frame_info *frame);
 357
 358 extern struct value *value_from_register (struct type *type, int regnum,
 359                                           struct frame_info *frame);
 360
 361 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 362                                         struct frame_info *frame);
 363
 364 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 365
 366 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 367
 368 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 369
 370 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 371
 372 extern int symbol_read_needs_frame (struct symbol *);
 373
 374 extern struct value *read_var_value (struct symbol *var,
 375                                      struct frame_info *frame);
 376
 377 extern struct value *allocate_value (struct type *type);
 378 extern struct value *allocate_value_lazy (struct type *type);
 379 extern void allocate_value_contents (struct value *value);
 380
 381 extern struct value *allocate_repeat_value (struct type *type, int count);
 382
 383 extern struct value *value_mark (void);
 384
 385 extern void value_free_to_mark (struct value *mark);
 386
 387 extern struct value *value_cstring (char *ptr, int len,
 388                                     struct type *char_type);
 389 extern struct value *value_string (char *ptr, int len,
 390                                    struct type *char_type);
 391 extern struct value *value_bitstring (char *ptr, int len,
 392                                       struct type *index_type);
 393
 394 extern struct value *value_array (int lowbound, int highbound,
 395                                   struct value **elemvec);
 396
 397 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 398
 399 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 400                                   enum exp_opcode op);
 401
 402 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 403
 404 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 405
 406 extern int value_must_coerce_to_target (struct value *arg1);
 407
 408 extern struct value *value_coerce_to_target (struct value *arg1);
 409
 410 extern struct value *value_coerce_array (struct value *arg1);
 411
 412 extern struct value *value_coerce_function (struct value *arg1);
 413
 414 extern struct value *value_ind (struct value *arg1);
 415
 416 extern struct value *value_addr (struct value *arg1);
 417
 418 extern struct value *value_ref (struct value *arg1);
 419
 420 extern struct value *value_assign (struct value *toval,
 421                                    struct value *fromval);
 422
 423 extern struct value *value_pos (struct value *arg1);
 424
 425 extern struct value *value_neg (struct value *arg1);
 426
 427 extern struct value *value_complement (struct value *arg1);
 428
 429 extern struct value *value_struct_elt (struct value **argp,
 430                                        struct value **args,
 431                                        char *name, int *static_memfuncp,
 432                                        char *err);
 433
 434 extern struct value *value_aggregate_elt (struct type *curtype,
 435                                           char *name,
 436                                           int want_address,
 437                                           enum noside noside);
 438
 439 extern struct value *value_static_field (struct type *type, int fieldno);
 440
 441 extern struct fn_field *value_find_oload_method_list (struct value **, char *,
 442                                                       int, int *,
 443                                                       struct type **, int *);
 444
 445 extern int find_overload_match (struct type **arg_types, int nargs,
 446                                 char *name, int method, int lax,
 447                                 struct value **objp, struct symbol *fsym,
 448                                 struct value **valp, struct symbol **symp,
 449                                 int *staticp);
 450
 451 extern struct value *value_field (struct value *arg1, int fieldno);
 452
 453 extern struct value *value_primitive_field (struct value *arg1, int offset,
 454                                             int fieldno,
 455                                             struct type *arg_type);
 456
 457
 458 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 459                                             int *);
 460
 461 extern struct value *value_full_object (struct value *, struct type *, int,
 462                                         int, int);
 463
 464 extern struct value *value_cast_pointers (struct type *, struct value *);
 465
 466 extern struct value *value_cast (struct type *type, struct value *arg2);
 467
 468 extern struct value *value_zero (struct type *type, enum lval_type lv);
 469
 470 extern struct value *value_one (struct type *type, enum lval_type lv);
 471
 472 extern struct value *value_repeat (struct value *arg1, int count);
 473
 474 extern struct value *value_subscript (struct value *array, LONGEST index);
 475
 476 extern struct value *value_bitstring_subscript (struct type *type,
 477                                                 struct value *bitstring,
 478                                                 LONGEST index);
 479
 480 extern struct value *register_value_being_returned (struct type *valtype,
 481                                                     struct regcache *retbuf);
 482
 483 extern int value_in (struct value *element, struct value *set);
 484
 485 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 486                             int index);
 487
 488 extern int using_struct_return (struct gdbarch *gdbarch,
 489                                 struct type *func_type,
 490                                 struct type *value_type);
 491
 492 extern struct value *evaluate_expression (struct expression *exp);
 493
 494 extern struct value *evaluate_type (struct expression *exp);
 495
 496 extern struct value *evaluate_subexp (struct type *expect_type,
 497                                       struct expression *exp,
 498                                       int *pos, enum noside noside);
 499
 500 extern struct value *evaluate_subexpression_type (struct expression *exp,
 501                                                   int subexp);
 502
 503 extern char *extract_field_op (struct expression *exp, int *subexp);
 504
 505 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 506                                                     int *, enum noside);
 507
 508 extern struct value *parse_and_eval (char *exp);
 509
 510 extern struct value *parse_to_comma_and_eval (char **expp);
 511
 512 extern struct type *parse_and_eval_type (char *p, int length);
 513
 514 extern CORE_ADDR parse_and_eval_address (char *exp);
 515
 516 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 517
 518 extern LONGEST parse_and_eval_long (char *exp);
 519
 520 extern void unop_promote (const struct language_defn *language,
 521                           struct gdbarch *gdbarch,
 522                           struct value **arg1);
 523
 524 extern void binop_promote (const struct language_defn *language,
 525                            struct gdbarch *gdbarch,
 526                            struct value **arg1, struct value **arg2);
 527
 528 extern struct value *access_value_history (int num);
 529
 530 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 531                                            struct internalvar *var);
 532
 533 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 534
 535 extern void set_internalvar (struct internalvar *var, struct value *val);
 536
 537 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 538
 539 extern void set_internalvar_string (struct internalvar *var,
 540                                     const char *string);
 541
 542 extern void clear_internalvar (struct internalvar *var);
 543
 544 extern void set_internalvar_component (struct internalvar *var,
 545                                        int offset,
 546                                        int bitpos, int bitsize,
 547                                        struct value *newvalue);
 548
 549 extern struct internalvar *lookup_only_internalvar (const char *name);
 550
 551 extern struct internalvar *create_internalvar (const char *name);
 552
 553 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 554                                                   struct internalvar *);
 555 extern struct internalvar *
 556   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 557
 558 extern struct internalvar *lookup_internalvar (const char *name);
 559
 560 extern int value_equal (struct value *arg1, struct value *arg2);
 561
 562 extern int value_less (struct value *arg1, struct value *arg2);
 563
 564 extern int value_logical_not (struct value *arg1);
 565
 566 /* C++ */
 567
 568 extern struct value *value_of_this (int complain);
 569
 570 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 571                                     enum exp_opcode op,
 572                                     enum exp_opcode otherop,
 573                                     enum noside noside);
 574
 575 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 576                                    enum noside noside);
 577
 578 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 579                                      int j, struct type *type, int offset);
 580
 581 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 582                                  struct value *arg2);
 583
 584 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 585
 586 extern int destructor_name_p (const char *name, const struct type *type);
 587
 588 extern void value_incref (struct value *val);
 589
 590 extern void value_free (struct value *val);
 591
 592 extern void free_all_values (void);
 593
 594 extern void release_value (struct value *val);
 595
 596 extern int record_latest_value (struct value *val);
 597
 598 extern void modify_field (struct type *type, gdb_byte *addr,
 599                           LONGEST fieldval, int bitpos, int bitsize);
 600
 601 extern void type_print (struct type *type, char *varstring,
 602                         struct ui_file *stream, int show);
 603
 604 extern char *type_to_string (struct type *type);
 605
 606 extern gdb_byte *baseclass_addr (struct type *type, int index,
 607                                  gdb_byte *valaddr,
 608                                  struct value **valuep, int *errp);
 609
 610 extern void print_longest (struct ui_file *stream, int format,
 611                            int use_local, LONGEST val);
 612
 613 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 614                             struct ui_file *stream);
 615
 616 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 617                                     struct ui_file *stream);
 618
 619 extern int value_print (struct value *val, struct ui_file *stream,
 620                         const struct value_print_options *options);
 621
 622 extern void value_print_array_elements (struct value *val,
 623                                         struct ui_file *stream, int format,
 624                                         enum val_prettyprint pretty);
 625
 626 extern struct value *value_release_to_mark (struct value *mark);
 627
 628 extern int val_print (struct type *type, const gdb_byte *valaddr,
 629                       int embedded_offset, CORE_ADDR address,
 630                       struct ui_file *stream, int recurse,
 631                       const struct value_print_options *options,
 632                       const struct language_defn *language);
 633
 634 extern int common_val_print (struct value *val,
 635                              struct ui_file *stream, int recurse,
 636                              const struct value_print_options *options,
 637                              const struct language_defn *language);
 638
 639 extern int val_print_string (struct type *elttype, CORE_ADDR addr, int len,
 640                              struct ui_file *stream,
 641                              const struct value_print_options *options);
 642
 643 extern void print_variable_and_value (const char *name,
 644                                       struct symbol *var,
 645                                       struct frame_info *frame,
 646                                       struct ui_file *stream,
 647                                       int indent);
 648
 649 extern int check_field (struct type *, const char *);
 650
 651 extern void typedef_print (struct type *type, struct symbol *news,
 652                            struct ui_file *stream);
 653
 654 extern char *internalvar_name (struct internalvar *var);
 655
 656 extern void preserve_values (struct objfile *);
 657
 658 /* From values.c */
 659
 660 extern struct value *value_copy (struct value *);
 661
 662 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
 663
 664 /* From valops.c */
 665
 666 extern struct value *varying_to_slice (struct value *);
 667
 668 extern struct value *value_slice (struct value *, int, int);
 669
 670 extern struct value *value_literal_complex (struct value *, struct value *,
 671                                             struct type *);
 672
 673 extern struct value *find_function_in_inferior (const char *,
 674                                                 struct objfile **);
 675
 676 extern struct value *value_allocate_space_in_inferior (int);
 677
 678 extern struct value *value_of_local (const char *name, int complain);
 679
 680 extern struct value *value_subscripted_rvalue (struct value *array,
 681                                                LONGEST index, int lowerbound);
 682
 683 /* User function handler.  */
 684
 685 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
 686                                                const struct language_defn *language,
 687                                                void *cookie,
 688                                                int argc,
 689                                                struct value **argv);
 690
 691 void add_internal_function (const char *name, const char *doc,
 692                             internal_function_fn handler,
 693                             void *cookie);
 694
 695 struct value *call_internal_function (struct gdbarch *gdbarch,
 696                                       const struct language_defn *language,
 697                                       struct value *function,
 698                                       int argc, struct value **argv);
 699
 700 char *value_internal_function_name (struct value *);
 701
 702 #endif /* !defined (VALUE_H) */