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, 2010 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 (const 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 (const 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 (const 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 (const 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   /* Check the validity of some bits in VALUE.  This should return 1
 168      if all the bits starting at OFFSET and extending for LENGTH bits
 169      are valid, or 0 if any bit is invalid.  */
 170   int (*check_validity) (const struct value *value, int offset, int length);
 171
 172   /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid.  */
 173   int (*check_any_valid) (const struct value *value);
 174
 175   /* Return a duplicate of VALUE's closure, for use in a new value.
 176      This may simply return the same closure, if VALUE's is
 177      reference-counted or statically allocated.
 178
 179      This may be NULL, in which case VALUE's closure is re-used in the
 180      new value.  */
 181   void *(*copy_closure) (const struct value *v);
 182
 183   /* Drop VALUE's reference to its closure.  Maybe this frees the
 184      closure; maybe this decrements a reference count; maybe the
 185      closure is statically allocated and this does nothing.
 186
 187      This may be NULL, in which case no action is taken to free
 188      VALUE's closure.  */
 189   void (*free_closure) (struct value *v);
 190 };
 191
 192 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
 193    and closure CLOSURE.  */
 194
 195 extern struct value *allocate_computed_value (struct type *type,
 196                                               struct lval_funcs *funcs,
 197                                               void *closure);
 198
 199 /* If VALUE is lval_computed, return its lval_funcs structure.  */
 200
 201 extern struct lval_funcs *value_computed_funcs (struct value *value);
 202
 203 /* If VALUE is lval_computed, return its closure.  The meaning of the
 204    returned value depends on the functions VALUE uses.  */
 205
 206 extern void *value_computed_closure (const struct value *value);
 207
 208 /* If zero, contents of this value are in the contents field.  If
 209    nonzero, contents are in inferior.  If the lval field is lval_memory,
 210    the contents are in inferior memory at location.address plus offset.
 211    The lval field may also be lval_register.
 212
 213    WARNING: This field is used by the code which handles watchpoints
 214    (see breakpoint.c) to decide whether a particular value can be
 215    watched by hardware watchpoints.  If the lazy flag is set for some
 216    member of a value chain, it is assumed that this member of the
 217    chain doesn't need to be watched as part of watching the value
 218    itself.  This is how GDB avoids watching the entire struct or array
 219    when the user wants to watch a single struct member or array
 220    element.  If you ever change the way lazy flag is set and reset, be
 221    sure to consider this use as well!  */
 222
 223 extern int value_lazy (struct value *);
 224 extern void set_value_lazy (struct value *value, int val);
 225
 226 extern int value_stack (struct value *);
 227 extern void set_value_stack (struct value *value, int val);
 228
 229 /* value_contents() and value_contents_raw() both return the address
 230    of the gdb buffer used to hold a copy of the contents of the lval.
 231    value_contents() is used when the contents of the buffer are needed
 232    -- it uses value_fetch_lazy() to load the buffer from the process
 233    being debugged if it hasn't already been loaded
 234    (value_contents_writeable() is used when a writeable but fetched
 235    buffer is required)..  value_contents_raw() is used when data is
 236    being stored into the buffer, or when it is certain that the
 237    contents of the buffer are valid.
 238
 239    Note: The contents pointer is adjusted by the offset required to
 240    get to the real subobject, if the value happens to represent
 241    something embedded in a larger run-time object.  */
 242
 243 extern gdb_byte *value_contents_raw (struct value *);
 244
 245 /* Actual contents of the value.  For use of this value; setting it
 246    uses the stuff above.  Not valid if lazy is nonzero.  Target
 247    byte-order.  We force it to be aligned properly for any possible
 248    value.  Note that a value therefore extends beyond what is
 249    declared here.  */
 250
 251 extern const gdb_byte *value_contents (struct value *);
 252 extern gdb_byte *value_contents_writeable (struct value *);
 253
 254 /* The ALL variants of the above two macros do not adjust the returned
 255    pointer by the embedded_offset value.  */
 256
 257 extern gdb_byte *value_contents_all_raw (struct value *);
 258 extern const gdb_byte *value_contents_all (struct value *);
 259
 260 /* Like value_contents_all, but does not require that the returned
 261    bits be valid.  This should only be used in situations where you
 262    plan to check the validity manually.  */
 263 extern const gdb_byte *value_contents_for_printing (struct value *value);
 264
 265 extern int value_fetch_lazy (struct value *val);
 266 extern int value_contents_equal (struct value *val1, struct value *val2);
 267
 268 /* If nonzero, this is the value of a variable which does not actually
 269    exist in the program.  */
 270 extern int value_optimized_out (struct value *value);
 271 extern void set_value_optimized_out (struct value *value, int val);
 272
 273 /* Like value_optimized_out, but return false if any bit in the object
 274    is valid.  */
 275 extern int value_entirely_optimized_out (const struct value *value);
 276
 277 /* Set or return field indicating whether a variable is initialized or
 278    not, based on debugging information supplied by the compiler.
 279    1 = initialized; 0 = uninitialized.  */
 280 extern int value_initialized (struct value *);
 281 extern void set_value_initialized (struct value *, int);
 282
 283 /* Set COMPONENT's location as appropriate for a component of WHOLE
 284    --- regardless of what kind of lvalue WHOLE is.  */
 285 extern void set_value_component_location (struct value *component,
 286                                           const struct value *whole);
 287
 288 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 289    single value might have multiple LVALs), this hacked interface is
 290    limited to just the first PIECE.  Expect further change.  */
 291 /* Type of value; either not an lval, or one of the various different
 292    possible kinds of lval.  */
 293 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 294 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 295
 296 /* If lval == lval_memory, return the address in the inferior.  If
 297    lval == lval_register, return the byte offset into the registers
 298    structure.  Otherwise, return 0.  The returned address
 299    includes the offset, if any.  */
 300 extern CORE_ADDR value_address (struct value *);
 301
 302 /* Like value_address, except the result does not include value's
 303    offset.  */
 304 extern CORE_ADDR value_raw_address (struct value *);
 305
 306 /* Set the address of a value.  */
 307 extern void set_value_address (struct value *, CORE_ADDR);
 308
 309 /* Pointer to internal variable.  */
 310 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 311 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 312
 313 /* Frame register value is relative to.  This will be described in the
 314    lval enum above as "lval_register".  */
 315 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 316 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 317
 318 /* Register number if the value is from a register.  */
 319 extern short *deprecated_value_regnum_hack (struct value *);
 320 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 321
 322 /* Convert a REF to the object referenced.  */
 323
 324 extern struct value *coerce_ref (struct value *value);
 325
 326 /* If ARG is an array, convert it to a pointer.
 327    If ARG is a function, convert it to a function pointer.
 328
 329    References are dereferenced.  */
 330
 331 extern struct value *coerce_array (struct value *value);
 332
 333 /* Given a value, determine whether the bits starting at OFFSET and
 334    extending for LENGTH bits are valid.  This returns nonzero if all
 335    bits in the given range are valid, zero if any bit is invalid.  */
 336
 337 extern int value_bits_valid (const struct value *value,
 338                              int offset, int length);
 339
 340 \f
 341
 342 #include "symtab.h"
 343 #include "gdbtypes.h"
 344 #include "expression.h"
 345
 346 struct frame_info;
 347 struct fn_field;
 348
 349 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
 350                                     struct ui_file *, int);
 351
 352 extern LONGEST value_as_long (struct value *val);
 353 extern DOUBLEST value_as_double (struct value *val);
 354 extern CORE_ADDR value_as_address (struct value *val);
 355
 356 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 357 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 358                                int *invp);
 359 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 360 LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
 361                              int bitpos, int bitsize);
 362 extern LONGEST unpack_field_as_long (struct type *type,
 363                                      const gdb_byte *valaddr,
 364                                      int fieldno);
 365
 366 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 367
 368 extern struct value *value_from_longest (struct type *type, LONGEST num);
 369 extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
 370 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 371 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 372 extern struct value *value_from_decfloat (struct type *type,
 373                                           const gdb_byte *decbytes);
 374
 375 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 376 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 377
 378 extern struct value *value_from_contents_and_address (struct type *,
 379                                                       const gdb_byte *,
 380                                                       CORE_ADDR);
 381
 382 extern struct value *default_value_from_register (struct type *type,
 383                                                   int regnum,
 384                                                   struct frame_info *frame);
 385
 386 extern struct value *value_from_register (struct type *type, int regnum,
 387                                           struct frame_info *frame);
 388
 389 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 390                                         struct frame_info *frame);
 391
 392 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 393
 394 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 395
 396 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 397
 398 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 399
 400 extern int symbol_read_needs_frame (struct symbol *);
 401
 402 extern struct value *read_var_value (struct symbol *var,
 403                                      struct frame_info *frame);
 404
 405 extern struct value *allocate_value (struct type *type);
 406 extern struct value *allocate_value_lazy (struct type *type);
 407 extern void allocate_value_contents (struct value *value);
 408
 409 extern struct value *allocate_repeat_value (struct type *type, int count);
 410
 411 extern struct value *value_mark (void);
 412
 413 extern void value_free_to_mark (struct value *mark);
 414
 415 extern struct value *value_cstring (char *ptr, int len,
 416                                     struct type *char_type);
 417 extern struct value *value_string (char *ptr, int len,
 418                                    struct type *char_type);
 419 extern struct value *value_bitstring (char *ptr, int len,
 420                                       struct type *index_type);
 421
 422 extern struct value *value_array (int lowbound, int highbound,
 423                                   struct value **elemvec);
 424
 425 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 426
 427 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 428                                   enum exp_opcode op);
 429
 430 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 431
 432 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 433
 434 extern int value_must_coerce_to_target (struct value *arg1);
 435
 436 extern struct value *value_coerce_to_target (struct value *arg1);
 437
 438 extern struct value *value_coerce_array (struct value *arg1);
 439
 440 extern struct value *value_coerce_function (struct value *arg1);
 441
 442 extern struct value *value_ind (struct value *arg1);
 443
 444 extern struct value *value_addr (struct value *arg1);
 445
 446 extern struct value *value_ref (struct value *arg1);
 447
 448 extern struct value *value_assign (struct value *toval,
 449                                    struct value *fromval);
 450
 451 extern struct value *value_pos (struct value *arg1);
 452
 453 extern struct value *value_neg (struct value *arg1);
 454
 455 extern struct value *value_complement (struct value *arg1);
 456
 457 extern struct value *value_struct_elt (struct value **argp,
 458                                        struct value **args,
 459                                        const char *name, int *static_memfuncp,
 460                                        const char *err);
 461
 462 extern struct value *value_aggregate_elt (struct type *curtype,
 463                                           char *name,
 464                                           struct type *expect_type,
 465                                           int want_address,
 466                                           enum noside noside);
 467
 468 extern struct value *value_static_field (struct type *type, int fieldno);
 469
 470 extern struct fn_field *value_find_oload_method_list (struct value **,
 471                                                       const char *,
 472                                                       int, int *,
 473                                                       struct type **, int *);
 474
 475 enum oload_search_type { NON_METHOD, METHOD, BOTH };
 476
 477 extern int find_overload_match (struct type **arg_types, int nargs,
 478                                 const char *name,
 479                                 enum oload_search_type method, int lax,
 480                                 struct value **objp, struct symbol *fsym,
 481                                 struct value **valp, struct symbol **symp,
 482                                 int *staticp, const int no_adl);
 483
 484 extern struct value *value_field (struct value *arg1, int fieldno);
 485
 486 extern struct value *value_primitive_field (struct value *arg1, int offset,
 487                                             int fieldno,
 488                                             struct type *arg_type);
 489
 490
 491 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 492                                             int *);
 493
 494 extern struct value *value_full_object (struct value *, struct type *, int,
 495                                         int, int);
 496
 497 extern struct value *value_cast_pointers (struct type *, struct value *);
 498
 499 extern struct value *value_cast (struct type *type, struct value *arg2);
 500
 501 extern struct value *value_reinterpret_cast (struct type *type,
 502                                              struct value *arg);
 503
 504 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
 505
 506 extern struct value *value_zero (struct type *type, enum lval_type lv);
 507
 508 extern struct value *value_one (struct type *type, enum lval_type lv);
 509
 510 extern struct value *value_repeat (struct value *arg1, int count);
 511
 512 extern struct value *value_subscript (struct value *array, LONGEST index);
 513
 514 extern struct value *value_bitstring_subscript (struct type *type,
 515                                                 struct value *bitstring,
 516                                                 LONGEST index);
 517
 518 extern struct value *register_value_being_returned (struct type *valtype,
 519                                                     struct regcache *retbuf);
 520
 521 extern int value_in (struct value *element, struct value *set);
 522
 523 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 524                             int index);
 525
 526 extern int using_struct_return (struct gdbarch *gdbarch,
 527                                 struct type *func_type,
 528                                 struct type *value_type);
 529
 530 extern struct value *evaluate_expression (struct expression *exp);
 531
 532 extern struct value *evaluate_type (struct expression *exp);
 533
 534 extern struct value *evaluate_subexp (struct type *expect_type,
 535                                       struct expression *exp,
 536                                       int *pos, enum noside noside);
 537
 538 extern struct value *evaluate_subexpression_type (struct expression *exp,
 539                                                   int subexp);
 540
 541 extern char *extract_field_op (struct expression *exp, int *subexp);
 542
 543 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 544                                                     int *, enum noside);
 545
 546 extern struct value *parse_and_eval (char *exp);
 547
 548 extern struct value *parse_to_comma_and_eval (char **expp);
 549
 550 extern struct type *parse_and_eval_type (char *p, int length);
 551
 552 extern CORE_ADDR parse_and_eval_address (char *exp);
 553
 554 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 555
 556 extern LONGEST parse_and_eval_long (char *exp);
 557
 558 extern void unop_promote (const struct language_defn *language,
 559                           struct gdbarch *gdbarch,
 560                           struct value **arg1);
 561
 562 extern void binop_promote (const struct language_defn *language,
 563                            struct gdbarch *gdbarch,
 564                            struct value **arg1, struct value **arg2);
 565
 566 extern struct value *access_value_history (int num);
 567
 568 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 569                                            struct internalvar *var);
 570
 571 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 572
 573 extern void set_internalvar (struct internalvar *var, struct value *val);
 574
 575 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 576
 577 extern void set_internalvar_string (struct internalvar *var,
 578                                     const char *string);
 579
 580 extern void clear_internalvar (struct internalvar *var);
 581
 582 extern void set_internalvar_component (struct internalvar *var,
 583                                        int offset,
 584                                        int bitpos, int bitsize,
 585                                        struct value *newvalue);
 586
 587 extern struct internalvar *lookup_only_internalvar (const char *name);
 588
 589 extern struct internalvar *create_internalvar (const char *name);
 590
 591 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 592                                                   struct internalvar *);
 593 extern struct internalvar *
 594   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 595
 596 extern struct internalvar *lookup_internalvar (const char *name);
 597
 598 extern int value_equal (struct value *arg1, struct value *arg2);
 599
 600 extern int value_equal_contents (struct value *arg1, struct value *arg2);
 601
 602 extern int value_less (struct value *arg1, struct value *arg2);
 603
 604 extern int value_logical_not (struct value *arg1);
 605
 606 /* C++ */
 607
 608 extern struct value *value_of_this (int complain);
 609
 610 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 611                                     enum exp_opcode op,
 612                                     enum exp_opcode otherop,
 613                                     enum noside noside);
 614
 615 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 616                                    enum noside noside);
 617
 618 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 619                                      int j, struct type *type, int offset);
 620
 621 extern int binop_types_user_defined_p (enum exp_opcode op,
 622                                        struct type *type1,
 623                                        struct type *type2);
 624
 625 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 626                                  struct value *arg2);
 627
 628 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 629
 630 extern int destructor_name_p (const char *name, const struct type *type);
 631
 632 extern void value_incref (struct value *val);
 633
 634 extern void value_free (struct value *val);
 635
 636 extern void free_all_values (void);
 637
 638 extern void release_value (struct value *val);
 639
 640 extern int record_latest_value (struct value *val);
 641
 642 extern void modify_field (struct type *type, gdb_byte *addr,
 643                           LONGEST fieldval, int bitpos, int bitsize);
 644
 645 extern void type_print (struct type *type, char *varstring,
 646                         struct ui_file *stream, int show);
 647
 648 extern char *type_to_string (struct type *type);
 649
 650 extern gdb_byte *baseclass_addr (struct type *type, int index,
 651                                  gdb_byte *valaddr,
 652                                  struct value **valuep, int *errp);
 653
 654 extern void print_longest (struct ui_file *stream, int format,
 655                            int use_local, LONGEST val);
 656
 657 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 658                             struct ui_file *stream);
 659
 660 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 661                                     struct ui_file *stream);
 662
 663 extern int value_print (struct value *val, struct ui_file *stream,
 664                         const struct value_print_options *options);
 665
 666 extern void value_print_array_elements (struct value *val,
 667                                         struct ui_file *stream, int format,
 668                                         enum val_prettyprint pretty);
 669
 670 extern struct value *value_release_to_mark (struct value *mark);
 671
 672 extern int val_print (struct type *type, const gdb_byte *valaddr,
 673                       int embedded_offset, CORE_ADDR address,
 674                       struct ui_file *stream, int recurse,
 675                       const struct value *val,
 676                       const struct value_print_options *options,
 677                       const struct language_defn *language);
 678
 679 extern int common_val_print (struct value *val,
 680                              struct ui_file *stream, int recurse,
 681                              const struct value_print_options *options,
 682                              const struct language_defn *language);
 683
 684 extern int val_print_string (struct type *elttype, CORE_ADDR addr, int len,
 685                              struct ui_file *stream,
 686                              const struct value_print_options *options);
 687
 688 extern void print_variable_and_value (const char *name,
 689                                       struct symbol *var,
 690                                       struct frame_info *frame,
 691                                       struct ui_file *stream,
 692                                       int indent);
 693
 694 extern int check_field (struct type *, const char *);
 695
 696 extern void typedef_print (struct type *type, struct symbol *news,
 697                            struct ui_file *stream);
 698
 699 extern char *internalvar_name (struct internalvar *var);
 700
 701 extern void preserve_values (struct objfile *);
 702
 703 /* From values.c */
 704
 705 extern struct value *value_copy (struct value *);
 706
 707 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
 708
 709 /* From valops.c */
 710
 711 extern struct value *varying_to_slice (struct value *);
 712
 713 extern struct value *value_slice (struct value *, int, int);
 714
 715 extern struct value *value_literal_complex (struct value *, struct value *,
 716                                             struct type *);
 717
 718 extern struct value *find_function_in_inferior (const char *,
 719                                                 struct objfile **);
 720
 721 extern struct value *value_allocate_space_in_inferior (int);
 722
 723 extern struct value *value_of_local (const char *name, int complain);
 724
 725 extern struct value *value_subscripted_rvalue (struct value *array,
 726                                                LONGEST index, int lowerbound);
 727
 728 /* User function handler.  */
 729
 730 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
 731                                                const struct language_defn *language,
 732                                                void *cookie,
 733                                                int argc,
 734                                                struct value **argv);
 735
 736 void add_internal_function (const char *name, const char *doc,
 737                             internal_function_fn handler,
 738                             void *cookie);
 739
 740 struct value *call_internal_function (struct gdbarch *gdbarch,
 741                                       const struct language_defn *language,
 742                                       struct value *function,
 743                                       int argc, struct value **argv);
 744
 745 char *value_internal_function_name (struct value *);
 746
 747 #endif /* !defined (VALUE_H) */