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 /* Needed if another module needs to maintain its own list of values.  */
  45
  46 void value_prepend_to_list (struct value **head, struct value *val);
  47 void value_remove_from_list (struct value **head, struct value *val);
  48
  49 /* Values are stored in a chain, so that they can be deleted easily
  50    over calls to the inferior.  Values assigned to internal variables,
  51    put into the value history or exposed to Python are taken off this
  52    list.  */
  53
  54 struct value *value_next (struct value *);
  55
  56 /* Type of the value.  */
  57
  58 extern struct type *value_type (struct value *);
  59
  60 /* This is being used to change the type of an existing value, that
  61    code should instead be creating a new value with the changed type
  62    (but possibly shared content).  */
  63
  64 extern void deprecated_set_value_type (struct value *value,
  65                                        struct type *type);
  66
  67 /* Only used for bitfields; number of bits contained in them.  */
  68
  69 extern int value_bitsize (struct value *);
  70 extern void set_value_bitsize (struct value *, int bit);
  71
  72 /* Only used for bitfields; position of start of field.  For
  73    gdbarch_bits_big_endian=0 targets, it is the position of the LSB.  For
  74    gdbarch_bits_big_endian=1 targets, it is the position of the MSB.  */
  75
  76 extern int value_bitpos (struct value *);
  77 extern void set_value_bitpos (struct value *, int bit);
  78
  79 /* Describes offset of a value within lval of a structure in bytes.
  80    If lval == lval_memory, this is an offset to the address.  If lval
  81    == lval_register, this is a further offset from location.address
  82    within the registers structure.  Note also the member
  83    embedded_offset below.  */
  84
  85 extern int value_offset (struct value *);
  86 extern void set_value_offset (struct value *, int offset);
  87
  88 /* The comment from "struct value" reads: ``Is it modifiable?  Only
  89    relevant if lval != not_lval.''.  Shouldn't the value instead be
  90    not_lval and be done with it?  */
  91
  92 extern int deprecated_value_modifiable (struct value *value);
  93 extern void deprecated_set_value_modifiable (struct value *value,
  94                                              int modifiable);
  95
  96 /* If a value represents a C++ object, then the `type' field gives the
  97    object's compile-time type.  If the object actually belongs to some
  98    class derived from `type', perhaps with other base classes and
  99    additional members, then `type' is just a subobject of the real
 100    thing, and the full object is probably larger than `type' would
 101    suggest.
 102
 103    If `type' is a dynamic class (i.e. one with a vtable), then GDB can
 104    actually determine the object's run-time type by looking at the
 105    run-time type information in the vtable.  When this information is
 106    available, we may elect to read in the entire object, for several
 107    reasons:
 108
 109    - When printing the value, the user would probably rather see the
 110      full object, not just the limited portion apparent from the
 111      compile-time type.
 112
 113    - If `type' has virtual base classes, then even printing `type'
 114      alone may require reaching outside the `type' portion of the
 115      object to wherever the virtual base class has been stored.
 116
 117    When we store the entire object, `enclosing_type' is the run-time
 118    type -- the complete object -- and `embedded_offset' is the offset
 119    of `type' within that larger type, in bytes.  The value_contents()
 120    macro takes `embedded_offset' into account, so most GDB code
 121    continues to see the `type' portion of the value, just as the
 122    inferior would.
 123
 124    If `type' is a pointer to an object, then `enclosing_type' is a
 125    pointer to the object's run-time type, and `pointed_to_offset' is
 126    the offset in bytes from the full object to the pointed-to object
 127    -- that is, the value `embedded_offset' would have if we followed
 128    the pointer and fetched the complete object.  (I don't really see
 129    the point.  Why not just determine the run-time type when you
 130    indirect, and avoid the special case?  The contents don't matter
 131    until you indirect anyway.)
 132
 133    If we're not doing anything fancy, `enclosing_type' is equal to
 134    `type', and `embedded_offset' is zero, so everything works
 135    normally.  */
 136
 137 extern struct type *value_enclosing_type (struct value *);
 138 extern struct value *value_change_enclosing_type (struct value *val,
 139                                                   struct type *new_type);
 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'.  */
 158   void (*read) (struct value *v);
 159
 160   /* Handle an assignment TOVAL = FROMVAL by writing the value of
 161      FROMVAL to TOVAL's location.  The contents of TOVAL have not yet
 162      been updated.  If a problem arises in doing so, this function
 163      should call 'error'.  */
 164   void (*write) (struct value *toval, struct value *fromval);
 165
 166   /* Return a duplicate of VALUE's closure, for use in a new value.
 167      This may simply return the same closure, if VALUE's is
 168      reference-counted or statically allocated.
 169
 170      This may be NULL, in which case VALUE's closure is re-used in the
 171      new value.  */
 172   void *(*copy_closure) (struct value *v);
 173
 174   /* Drop VALUE's reference to its closure.  Maybe this frees the
 175      closure; maybe this decrements a reference count; maybe the
 176      closure is statically allocated and this does nothing.
 177
 178      This may be NULL, in which case no action is taken to free
 179      VALUE's closure.  */
 180   void (*free_closure) (struct value *v);
 181 };
 182
 183 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
 184    and closure CLOSURE.  */
 185
 186 extern struct value *allocate_computed_value (struct type *type,
 187                                               struct lval_funcs *funcs,
 188                                               void *closure);
 189
 190 /* If VALUE is lval_computed, return its lval_funcs structure.  */
 191
 192 extern struct lval_funcs *value_computed_funcs (struct value *value);
 193
 194 /* If VALUE is lval_computed, return its closure.  The meaning of the
 195    returned value depends on the functions VALUE uses.  */
 196
 197 extern void *value_computed_closure (struct value *value);
 198
 199 /* If zero, contents of this value are in the contents field.  If
 200    nonzero, contents are in inferior.  If the lval field is lval_memory,
 201    the contents are in inferior memory at location.address plus offset.
 202    The lval field may also be lval_register.
 203
 204    WARNING: This field is used by the code which handles watchpoints
 205    (see breakpoint.c) to decide whether a particular value can be
 206    watched by hardware watchpoints.  If the lazy flag is set for some
 207    member of a value chain, it is assumed that this member of the
 208    chain doesn't need to be watched as part of watching the value
 209    itself.  This is how GDB avoids watching the entire struct or array
 210    when the user wants to watch a single struct member or array
 211    element.  If you ever change the way lazy flag is set and reset, be
 212    sure to consider this use as well!  */
 213
 214 extern int value_lazy (struct value *);
 215 extern void set_value_lazy (struct value *value, int val);
 216
 217 /* value_contents() and value_contents_raw() both return the address
 218    of the gdb buffer used to hold a copy of the contents of the lval.
 219    value_contents() is used when the contents of the buffer are needed
 220    -- it uses value_fetch_lazy() to load the buffer from the process
 221    being debugged if it hasn't already been loaded
 222    (value_contents_writeable() is used when a writeable but fetched
 223    buffer is required)..  value_contents_raw() is used when data is
 224    being stored into the buffer, or when it is certain that the
 225    contents of the buffer are valid.
 226
 227    Note: The contents pointer is adjusted by the offset required to
 228    get to the real subobject, if the value happens to represent
 229    something embedded in a larger run-time object.  */
 230
 231 extern gdb_byte *value_contents_raw (struct value *);
 232
 233 /* Actual contents of the value.  For use of this value; setting it
 234    uses the stuff above.  Not valid if lazy is nonzero.  Target
 235    byte-order.  We force it to be aligned properly for any possible
 236    value.  Note that a value therefore extends beyond what is
 237    declared here.  */
 238
 239 extern const gdb_byte *value_contents (struct value *);
 240 extern gdb_byte *value_contents_writeable (struct value *);
 241
 242 /* The ALL variants of the above two macros do not adjust the returned
 243    pointer by the embedded_offset value.  */
 244
 245 extern gdb_byte *value_contents_all_raw (struct value *);
 246 extern const gdb_byte *value_contents_all (struct value *);
 247
 248 extern int value_fetch_lazy (struct value *val);
 249 extern int value_contents_equal (struct value *val1, struct value *val2);
 250
 251 /* If nonzero, this is the value of a variable which does not actually
 252    exist in the program.  */
 253 extern int value_optimized_out (struct value *value);
 254 extern void set_value_optimized_out (struct value *value, int val);
 255
 256 /* Set or return field indicating whether a variable is initialized or
 257    not, based on debugging information supplied by the compiler.
 258    1 = initialized; 0 = uninitialized.  */
 259 extern int value_initialized (struct value *);
 260 extern void set_value_initialized (struct value *, int);
 261
 262 /* Set COMPONENT's location as appropriate for a component of WHOLE
 263    --- regardless of what kind of lvalue WHOLE is.  */
 264 extern void set_value_component_location (struct value *component,
 265                                           struct value *whole);
 266
 267 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 268    single value might have multiple LVALs), this hacked interface is
 269    limited to just the first PIECE.  Expect further change.  */
 270 /* Type of value; either not an lval, or one of the various different
 271    possible kinds of lval.  */
 272 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 273 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 274
 275 /* If lval == lval_memory, return the address in the inferior.  If
 276    lval == lval_register, return the byte offset into the registers
 277    structure.  Otherwise, return 0.  The returned address
 278    includes the offset, if any.  */
 279 extern CORE_ADDR value_address (struct value *);
 280
 281 /* Like value_address, except the result does not include value's
 282    offset.  */
 283 extern CORE_ADDR value_raw_address (struct value *);
 284
 285 /* Set the address of a value.  */
 286 extern void set_value_address (struct value *, CORE_ADDR);
 287
 288 /* Pointer to internal variable.  */
 289 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 290 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 291
 292 /* Frame register value is relative to.  This will be described in the
 293    lval enum above as "lval_register".  */
 294 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 295 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 296
 297 /* Register number if the value is from a register.  */
 298 extern short *deprecated_value_regnum_hack (struct value *);
 299 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 300
 301 /* Convert a REF to the object referenced.  */
 302
 303 extern struct value *coerce_ref (struct value *value);
 304
 305 /* If ARG is an array, convert it to a pointer.
 306    If ARG is a function, convert it to a function pointer.
 307
 308    References are dereferenced.  */
 309
 310 extern struct value *coerce_array (struct value *value);
 311
 312 \f
 313
 314 #include "symtab.h"
 315 #include "gdbtypes.h"
 316 #include "expression.h"
 317
 318 struct frame_info;
 319 struct fn_field;
 320
 321 extern void print_address_demangle (CORE_ADDR, struct ui_file *, int);
 322
 323 extern LONGEST value_as_long (struct value *val);
 324 extern DOUBLEST value_as_double (struct value *val);
 325 extern CORE_ADDR value_as_address (struct value *val);
 326
 327 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 328 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 329                                int *invp);
 330 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 331 extern LONGEST unpack_field_as_long (struct type *type,
 332                                      const gdb_byte *valaddr,
 333                                      int fieldno);
 334
 335 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 336
 337 extern struct value *value_from_longest (struct type *type, LONGEST num);
 338 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 339 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 340 extern struct value *value_from_decfloat (struct type *type,
 341                                           const gdb_byte *decbytes);
 342
 343 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 344 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 345
 346 extern struct value *value_from_contents_and_address (struct type *,
 347                                                       const gdb_byte *,
 348                                                       CORE_ADDR);
 349
 350 extern struct value *default_value_from_register (struct type *type,
 351                                                   int regnum,
 352                                                   struct frame_info *frame);
 353
 354 extern struct value *value_from_register (struct type *type, int regnum,
 355                                           struct frame_info *frame);
 356
 357 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 358                                         struct frame_info *frame);
 359
 360 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 361
 362 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 363
 364 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 365
 366 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 367
 368 extern int symbol_read_needs_frame (struct symbol *);
 369
 370 extern struct value *read_var_value (struct symbol *var,
 371                                      struct frame_info *frame);
 372
 373 extern struct value *allocate_value (struct type *type);
 374 extern struct value *allocate_value_lazy (struct type *type);
 375 extern void allocate_value_contents (struct value *value);
 376
 377 extern struct value *allocate_repeat_value (struct type *type, int count);
 378
 379 extern struct value *value_mark (void);
 380
 381 extern void value_free_to_mark (struct value *mark);
 382
 383 extern struct value *value_cstring (char *ptr, int len,
 384                                     struct type *char_type);
 385 extern struct value *value_string (char *ptr, int len,
 386                                    struct type *char_type);
 387 extern struct value *value_bitstring (char *ptr, int len,
 388                                       struct type *index_type);
 389
 390 extern struct value *value_array (int lowbound, int highbound,
 391                                   struct value **elemvec);
 392
 393 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 394
 395 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 396                                   enum exp_opcode op);
 397
 398 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 399
 400 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 401
 402 extern int value_must_coerce_to_target (struct value *arg1);
 403
 404 extern struct value *value_coerce_to_target (struct value *arg1);
 405
 406 extern struct value *value_coerce_array (struct value *arg1);
 407
 408 extern struct value *value_coerce_function (struct value *arg1);
 409
 410 extern struct value *value_ind (struct value *arg1);
 411
 412 extern struct value *value_addr (struct value *arg1);
 413
 414 extern struct value *value_ref (struct value *arg1);
 415
 416 extern struct value *value_assign (struct value *toval,
 417                                    struct value *fromval);
 418
 419 extern struct value *value_pos (struct value *arg1);
 420
 421 extern struct value *value_neg (struct value *arg1);
 422
 423 extern struct value *value_complement (struct value *arg1);
 424
 425 extern struct value *value_struct_elt (struct value **argp,
 426                                        struct value **args,
 427                                        char *name, int *static_memfuncp,
 428                                        char *err);
 429
 430 extern struct value *value_aggregate_elt (struct type *curtype,
 431                                           char *name,
 432                                           int want_address,
 433                                           enum noside noside);
 434
 435 extern struct value *value_static_field (struct type *type, int fieldno);
 436
 437 extern struct fn_field *value_find_oload_method_list (struct value **, char *,
 438                                                       int, int *,
 439                                                       struct type **, int *);
 440
 441 extern int find_overload_match (struct type **arg_types, int nargs,
 442                                 char *name, int method, int lax,
 443                                 struct value **objp, struct symbol *fsym,
 444                                 struct value **valp, struct symbol **symp,
 445                                 int *staticp);
 446
 447 extern struct value *value_field (struct value *arg1, int fieldno);
 448
 449 extern struct value *value_primitive_field (struct value *arg1, int offset,
 450                                             int fieldno,
 451                                             struct type *arg_type);
 452
 453
 454 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 455                                             int *);
 456
 457 extern struct value *value_full_object (struct value *, struct type *, int,
 458                                         int, int);
 459
 460 extern struct value *value_cast_pointers (struct type *, struct value *);
 461
 462 extern struct value *value_cast (struct type *type, struct value *arg2);
 463
 464 extern struct value *value_zero (struct type *type, enum lval_type lv);
 465
 466 extern struct value *value_one (struct type *type, enum lval_type lv);
 467
 468 extern struct value *value_repeat (struct value *arg1, int count);
 469
 470 extern struct value *value_subscript (struct value *array, LONGEST index);
 471
 472 extern struct value *value_bitstring_subscript (struct type *type,
 473                                                 struct value *bitstring,
 474                                                 LONGEST index);
 475
 476 extern struct value *register_value_being_returned (struct type *valtype,
 477                                                     struct regcache *retbuf);
 478
 479 extern int value_in (struct value *element, struct value *set);
 480
 481 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 482                             int index);
 483
 484 extern int using_struct_return (struct gdbarch *gdbarch,
 485                                 struct type *func_type,
 486                                 struct type *value_type);
 487
 488 extern struct value *evaluate_expression (struct expression *exp);
 489
 490 extern struct value *evaluate_type (struct expression *exp);
 491
 492 extern struct value *evaluate_subexp (struct type *expect_type,
 493                                       struct expression *exp,
 494                                       int *pos, enum noside noside);
 495
 496 extern struct value *evaluate_subexpression_type (struct expression *exp,
 497                                                   int subexp);
 498
 499 extern char *extract_field_op (struct expression *exp, int *subexp);
 500
 501 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 502                                                     int *, enum noside);
 503
 504 extern struct value *parse_and_eval (char *exp);
 505
 506 extern struct value *parse_to_comma_and_eval (char **expp);
 507
 508 extern struct type *parse_and_eval_type (char *p, int length);
 509
 510 extern CORE_ADDR parse_and_eval_address (char *exp);
 511
 512 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 513
 514 extern LONGEST parse_and_eval_long (char *exp);
 515
 516 extern void unop_promote (const struct language_defn *language,
 517                           struct gdbarch *gdbarch,
 518                           struct value **arg1);
 519
 520 extern void binop_promote (const struct language_defn *language,
 521                            struct gdbarch *gdbarch,
 522                            struct value **arg1, struct value **arg2);
 523
 524 extern struct value *access_value_history (int num);
 525
 526 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 527                                            struct internalvar *var);
 528
 529 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 530
 531 extern void set_internalvar (struct internalvar *var, struct value *val);
 532
 533 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 534
 535 extern void set_internalvar_string (struct internalvar *var,
 536                                     const char *string);
 537
 538 extern void clear_internalvar (struct internalvar *var);
 539
 540 extern void set_internalvar_component (struct internalvar *var,
 541                                        int offset,
 542                                        int bitpos, int bitsize,
 543                                        struct value *newvalue);
 544
 545 extern struct internalvar *lookup_only_internalvar (const char *name);
 546
 547 extern struct internalvar *create_internalvar (const char *name);
 548
 549 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 550                                                   struct internalvar *);
 551 extern struct internalvar *
 552   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 553
 554 extern struct internalvar *lookup_internalvar (const char *name);
 555
 556 extern int value_equal (struct value *arg1, struct value *arg2);
 557
 558 extern int value_less (struct value *arg1, struct value *arg2);
 559
 560 extern int value_logical_not (struct value *arg1);
 561
 562 /* C++ */
 563
 564 extern struct value *value_of_this (int complain);
 565
 566 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 567                                     enum exp_opcode op,
 568                                     enum exp_opcode otherop,
 569                                     enum noside noside);
 570
 571 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 572                                    enum noside noside);
 573
 574 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 575                                      int j, struct type *type, int offset);
 576
 577 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 578                                  struct value *arg2);
 579
 580 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 581
 582 extern int destructor_name_p (const char *name, const struct type *type);
 583
 584 extern void value_free (struct value *val);
 585
 586 extern void free_all_values (void);
 587
 588 extern void release_value (struct value *val);
 589
 590 extern int record_latest_value (struct value *val);
 591
 592 extern void modify_field (gdb_byte *addr, LONGEST fieldval, int bitpos,
 593                           int bitsize);
 594
 595 extern void type_print (struct type *type, char *varstring,
 596                         struct ui_file *stream, int show);
 597
 598 extern char *type_to_string (struct type *type);
 599
 600 extern gdb_byte *baseclass_addr (struct type *type, int index,
 601                                  gdb_byte *valaddr,
 602                                  struct value **valuep, int *errp);
 603
 604 extern void print_longest (struct ui_file *stream, int format,
 605                            int use_local, LONGEST val);
 606
 607 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 608                             struct ui_file *stream);
 609
 610 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 611                                     struct ui_file *stream);
 612
 613 extern int value_print (struct value *val, struct ui_file *stream,
 614                         const struct value_print_options *options);
 615
 616 extern void value_print_array_elements (struct value *val,
 617                                         struct ui_file *stream, int format,
 618                                         enum val_prettyprint pretty);
 619
 620 extern struct value *value_release_to_mark (struct value *mark);
 621
 622 extern int val_print (struct type *type, const gdb_byte *valaddr,
 623                       int embedded_offset, CORE_ADDR address,
 624                       struct ui_file *stream, int recurse,
 625                       const struct value_print_options *options,
 626                       const struct language_defn *language);
 627
 628 extern int common_val_print (struct value *val,
 629                              struct ui_file *stream, int recurse,
 630                              const struct value_print_options *options,
 631                              const struct language_defn *language);
 632
 633 extern int val_print_string (struct type *elttype, CORE_ADDR addr, int len,
 634                              struct ui_file *stream,
 635                              const struct value_print_options *options);
 636
 637 extern void print_variable_and_value (const char *name,
 638                                       struct symbol *var,
 639                                       struct frame_info *frame,
 640                                       struct ui_file *stream,
 641                                       int indent);
 642
 643 extern int check_field (struct type *, const char *);
 644
 645 extern void typedef_print (struct type *type, struct symbol *news,
 646                            struct ui_file *stream);
 647
 648 extern char *internalvar_name (struct internalvar *var);
 649
 650 extern void preserve_values (struct objfile *);
 651
 652 /* From values.c */
 653
 654 extern struct value *value_copy (struct value *);
 655
 656 /* From valops.c */
 657
 658 extern struct value *varying_to_slice (struct value *);
 659
 660 extern struct value *value_slice (struct value *, int, int);
 661
 662 extern struct value *value_literal_complex (struct value *, struct value *,
 663                                             struct type *);
 664
 665 extern struct value *find_function_in_inferior (const char *,
 666                                                 struct objfile **);
 667
 668 extern struct value *value_allocate_space_in_inferior (int);
 669
 670 extern struct value *value_of_local (const char *name, int complain);
 671
 672 extern struct value *value_subscripted_rvalue (struct value *array,
 673                                                LONGEST index, int lowerbound);
 674
 675 /* User function handler.  */
 676
 677 typedef struct value *(*internal_function_fn) (void *cookie,
 678                                                int argc,
 679                                                struct value **argv);
 680
 681 void add_internal_function (const char *name, const char *doc,
 682                             internal_function_fn handler,
 683                             void *cookie);
 684
 685 struct value *call_internal_function (struct value *function,
 686                                       int argc, struct value **argv);
 687
 688 char *value_internal_function_name (struct value *);
 689
 690 #endif /* !defined (VALUE_H) */