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 void set_value_enclosing_type (struct value *val,
 140                                       struct type *new_type);
 141
 142 extern int value_pointed_to_offset (struct value *value);
 143 extern void set_value_pointed_to_offset (struct value *value, int val);
 144 extern int value_embedded_offset (struct value *value);
 145 extern void set_value_embedded_offset (struct value *value, int val);
 146
 147 /* For lval_computed values, this structure holds functions used to
 148    retrieve and set the value (or portions of the value).
 149
 150    For each function, 'V' is the 'this' pointer: an lval_funcs
 151    function F may always assume that the V it receives is an
 152    lval_computed value, and has F in the appropriate slot of its
 153    lval_funcs structure.  */
 154
 155 struct lval_funcs
 156 {
 157   /* Fill in VALUE's contents.  This is used to "un-lazy" values.  If
 158      a problem arises in obtaining VALUE's bits, this function should
 159      call 'error'.  */
 160   void (*read) (struct value *v);
 161
 162   /* Handle an assignment TOVAL = FROMVAL by writing the value of
 163      FROMVAL to TOVAL's location.  The contents of TOVAL have not yet
 164      been updated.  If a problem arises in doing so, this function
 165      should call 'error'.  */
 166   void (*write) (struct value *toval, struct value *fromval);
 167
 168   /* Check the validity of some bits in VALUE.  This should return 1
 169      if all the bits starting at OFFSET and extending for LENGTH bits
 170      are valid, or 0 if any bit is invalid.  */
 171   int (*check_validity) (const struct value *value, int offset, int length);
 172
 173   /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid.  */
 174   int (*check_any_valid) (const struct value *value);
 175
 176   /* Return a duplicate of VALUE's closure, for use in a new value.
 177      This may simply return the same closure, if VALUE's is
 178      reference-counted or statically allocated.
 179
 180      This may be NULL, in which case VALUE's closure is re-used in the
 181      new value.  */
 182   void *(*copy_closure) (const struct value *v);
 183
 184   /* Drop VALUE's reference to its closure.  Maybe this frees the
 185      closure; maybe this decrements a reference count; maybe the
 186      closure is statically allocated and this does nothing.
 187
 188      This may be NULL, in which case no action is taken to free
 189      VALUE's closure.  */
 190   void (*free_closure) (struct value *v);
 191 };
 192
 193 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
 194    and closure CLOSURE.  */
 195
 196 extern struct value *allocate_computed_value (struct type *type,
 197                                               struct lval_funcs *funcs,
 198                                               void *closure);
 199
 200 /* If VALUE is lval_computed, return its lval_funcs structure.  */
 201
 202 extern struct lval_funcs *value_computed_funcs (struct value *value);
 203
 204 /* If VALUE is lval_computed, return its closure.  The meaning of the
 205    returned value depends on the functions VALUE uses.  */
 206
 207 extern void *value_computed_closure (const struct value *value);
 208
 209 /* If zero, contents of this value are in the contents field.  If
 210    nonzero, contents are in inferior.  If the lval field is lval_memory,
 211    the contents are in inferior memory at location.address plus offset.
 212    The lval field may also be lval_register.
 213
 214    WARNING: This field is used by the code which handles watchpoints
 215    (see breakpoint.c) to decide whether a particular value can be
 216    watched by hardware watchpoints.  If the lazy flag is set for some
 217    member of a value chain, it is assumed that this member of the
 218    chain doesn't need to be watched as part of watching the value
 219    itself.  This is how GDB avoids watching the entire struct or array
 220    when the user wants to watch a single struct member or array
 221    element.  If you ever change the way lazy flag is set and reset, be
 222    sure to consider this use as well!  */
 223
 224 extern int value_lazy (struct value *);
 225 extern void set_value_lazy (struct value *value, int val);
 226
 227 extern int value_stack (struct value *);
 228 extern void set_value_stack (struct value *value, int val);
 229
 230 /* value_contents() and value_contents_raw() both return the address
 231    of the gdb buffer used to hold a copy of the contents of the lval.
 232    value_contents() is used when the contents of the buffer are needed
 233    -- it uses value_fetch_lazy() to load the buffer from the process
 234    being debugged if it hasn't already been loaded
 235    (value_contents_writeable() is used when a writeable but fetched
 236    buffer is required)..  value_contents_raw() is used when data is
 237    being stored into the buffer, or when it is certain that the
 238    contents of the buffer are valid.
 239
 240    Note: The contents pointer is adjusted by the offset required to
 241    get to the real subobject, if the value happens to represent
 242    something embedded in a larger run-time object.  */
 243
 244 extern gdb_byte *value_contents_raw (struct value *);
 245
 246 /* Actual contents of the value.  For use of this value; setting it
 247    uses the stuff above.  Not valid if lazy is nonzero.  Target
 248    byte-order.  We force it to be aligned properly for any possible
 249    value.  Note that a value therefore extends beyond what is
 250    declared here.  */
 251
 252 extern const gdb_byte *value_contents (struct value *);
 253 extern gdb_byte *value_contents_writeable (struct value *);
 254
 255 /* The ALL variants of the above two macros do not adjust the returned
 256    pointer by the embedded_offset value.  */
 257
 258 extern gdb_byte *value_contents_all_raw (struct value *);
 259 extern const gdb_byte *value_contents_all (struct value *);
 260
 261 /* Like value_contents_all, but does not require that the returned
 262    bits be valid.  This should only be used in situations where you
 263    plan to check the validity manually.  */
 264 extern const gdb_byte *value_contents_for_printing (struct value *value);
 265
 266 extern int value_fetch_lazy (struct value *val);
 267 extern int value_contents_equal (struct value *val1, struct value *val2);
 268
 269 /* If nonzero, this is the value of a variable which does not actually
 270    exist in the program.  */
 271 extern int value_optimized_out (struct value *value);
 272 extern void set_value_optimized_out (struct value *value, int val);
 273
 274 /* Like value_optimized_out, but return false if any bit in the object
 275    is valid.  */
 276 extern int value_entirely_optimized_out (const struct value *value);
 277
 278 /* Set or return field indicating whether a variable is initialized or
 279    not, based on debugging information supplied by the compiler.
 280    1 = initialized; 0 = uninitialized.  */
 281 extern int value_initialized (struct value *);
 282 extern void set_value_initialized (struct value *, int);
 283
 284 /* Set COMPONENT's location as appropriate for a component of WHOLE
 285    --- regardless of what kind of lvalue WHOLE is.  */
 286 extern void set_value_component_location (struct value *component,
 287                                           const struct value *whole);
 288
 289 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 290    single value might have multiple LVALs), this hacked interface is
 291    limited to just the first PIECE.  Expect further change.  */
 292 /* Type of value; either not an lval, or one of the various different
 293    possible kinds of lval.  */
 294 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 295 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 296
 297 /* If lval == lval_memory, return the address in the inferior.  If
 298    lval == lval_register, return the byte offset into the registers
 299    structure.  Otherwise, return 0.  The returned address
 300    includes the offset, if any.  */
 301 extern CORE_ADDR value_address (struct value *);
 302
 303 /* Like value_address, except the result does not include value's
 304    offset.  */
 305 extern CORE_ADDR value_raw_address (struct value *);
 306
 307 /* Set the address of a value.  */
 308 extern void set_value_address (struct value *, CORE_ADDR);
 309
 310 /* Pointer to internal variable.  */
 311 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 312 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 313
 314 /* Frame register value is relative to.  This will be described in the
 315    lval enum above as "lval_register".  */
 316 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 317 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 318
 319 /* Register number if the value is from a register.  */
 320 extern short *deprecated_value_regnum_hack (struct value *);
 321 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 322
 323 /* Convert a REF to the object referenced.  */
 324
 325 extern struct value *coerce_ref (struct value *value);
 326
 327 /* If ARG is an array, convert it to a pointer.
 328    If ARG is a function, convert it to a function pointer.
 329
 330    References are dereferenced.  */
 331
 332 extern struct value *coerce_array (struct value *value);
 333
 334 /* Given a value, determine whether the bits starting at OFFSET and
 335    extending for LENGTH bits are valid.  This returns nonzero if all
 336    bits in the given range are valid, zero if any bit is invalid.  */
 337
 338 extern int value_bits_valid (const struct value *value,
 339                              int offset, int length);
 340
 341 \f
 342
 343 #include "symtab.h"
 344 #include "gdbtypes.h"
 345 #include "expression.h"
 346
 347 struct frame_info;
 348 struct fn_field;
 349
 350 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
 351                                     struct ui_file *, int);
 352
 353 extern LONGEST value_as_long (struct value *val);
 354 extern DOUBLEST value_as_double (struct value *val);
 355 extern CORE_ADDR value_as_address (struct value *val);
 356
 357 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 358 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 359                                int *invp);
 360 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 361 LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
 362                              int bitpos, int bitsize);
 363 extern LONGEST unpack_field_as_long (struct type *type,
 364                                      const gdb_byte *valaddr,
 365                                      int fieldno);
 366
 367 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 368
 369 extern struct value *value_from_longest (struct type *type, LONGEST num);
 370 extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
 371 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 372 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 373 extern struct value *value_from_decfloat (struct type *type,
 374                                           const gdb_byte *decbytes);
 375
 376 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 377 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 378
 379 extern struct value *value_from_contents_and_address (struct type *,
 380                                                       const gdb_byte *,
 381                                                       CORE_ADDR);
 382
 383 extern struct value *default_value_from_register (struct type *type,
 384                                                   int regnum,
 385                                                   struct frame_info *frame);
 386
 387 extern struct value *value_from_register (struct type *type, int regnum,
 388                                           struct frame_info *frame);
 389
 390 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 391                                         struct frame_info *frame);
 392
 393 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 394
 395 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 396
 397 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 398
 399 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 400
 401 extern int symbol_read_needs_frame (struct symbol *);
 402
 403 extern struct value *read_var_value (struct symbol *var,
 404                                      struct frame_info *frame);
 405
 406 extern struct value *allocate_value (struct type *type);
 407 extern struct value *allocate_value_lazy (struct type *type);
 408 extern void allocate_value_contents (struct value *value);
 409
 410 extern struct value *allocate_repeat_value (struct type *type, int count);
 411
 412 extern struct value *value_mark (void);
 413
 414 extern void value_free_to_mark (struct value *mark);
 415
 416 extern struct value *value_cstring (char *ptr, int len,
 417                                     struct type *char_type);
 418 extern struct value *value_string (char *ptr, int len,
 419                                    struct type *char_type);
 420 extern struct value *value_bitstring (char *ptr, int len,
 421                                       struct type *index_type);
 422
 423 extern struct value *value_array (int lowbound, int highbound,
 424                                   struct value **elemvec);
 425
 426 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 427
 428 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 429                                   enum exp_opcode op);
 430
 431 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 432
 433 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 434
 435 extern int value_must_coerce_to_target (struct value *arg1);
 436
 437 extern struct value *value_coerce_to_target (struct value *arg1);
 438
 439 extern struct value *value_coerce_array (struct value *arg1);
 440
 441 extern struct value *value_coerce_function (struct value *arg1);
 442
 443 extern struct value *value_ind (struct value *arg1);
 444
 445 extern struct value *value_addr (struct value *arg1);
 446
 447 extern struct value *value_ref (struct value *arg1);
 448
 449 extern struct value *value_assign (struct value *toval,
 450                                    struct value *fromval);
 451
 452 extern struct value *value_pos (struct value *arg1);
 453
 454 extern struct value *value_neg (struct value *arg1);
 455
 456 extern struct value *value_complement (struct value *arg1);
 457
 458 extern struct value *value_struct_elt (struct value **argp,
 459                                        struct value **args,
 460                                        const char *name, int *static_memfuncp,
 461                                        const char *err);
 462
 463 extern struct value *value_aggregate_elt (struct type *curtype,
 464                                           char *name,
 465                                           struct type *expect_type,
 466                                           int want_address,
 467                                           enum noside noside);
 468
 469 extern struct value *value_static_field (struct type *type, int fieldno);
 470
 471 extern struct fn_field *value_find_oload_method_list (struct value **,
 472                                                       const char *,
 473                                                       int, int *,
 474                                                       struct type **, int *);
 475
 476 enum oload_search_type { NON_METHOD, METHOD, BOTH };
 477
 478 extern int find_overload_match (struct type **arg_types, int nargs,
 479                                 const char *name,
 480                                 enum oload_search_type method, int lax,
 481                                 struct value **objp, struct symbol *fsym,
 482                                 struct value **valp, struct symbol **symp,
 483                                 int *staticp, const int no_adl);
 484
 485 extern struct value *value_field (struct value *arg1, int fieldno);
 486
 487 extern struct value *value_primitive_field (struct value *arg1, int offset,
 488                                             int fieldno,
 489                                             struct type *arg_type);
 490
 491
 492 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 493                                             int *);
 494
 495 extern struct value *value_full_object (struct value *, struct type *, int,
 496                                         int, int);
 497
 498 extern struct value *value_cast_pointers (struct type *, struct value *);
 499
 500 extern struct value *value_cast (struct type *type, struct value *arg2);
 501
 502 extern struct value *value_reinterpret_cast (struct type *type,
 503                                              struct value *arg);
 504
 505 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
 506
 507 extern struct value *value_zero (struct type *type, enum lval_type lv);
 508
 509 extern struct value *value_one (struct type *type, enum lval_type lv);
 510
 511 extern struct value *value_repeat (struct value *arg1, int count);
 512
 513 extern struct value *value_subscript (struct value *array, LONGEST index);
 514
 515 extern struct value *value_bitstring_subscript (struct type *type,
 516                                                 struct value *bitstring,
 517                                                 LONGEST index);
 518
 519 extern struct value *register_value_being_returned (struct type *valtype,
 520                                                     struct regcache *retbuf);
 521
 522 extern int value_in (struct value *element, struct value *set);
 523
 524 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 525                             int index);
 526
 527 extern int using_struct_return (struct gdbarch *gdbarch,
 528                                 struct type *func_type,
 529                                 struct type *value_type);
 530
 531 extern struct value *evaluate_expression (struct expression *exp);
 532
 533 extern struct value *evaluate_type (struct expression *exp);
 534
 535 extern struct value *evaluate_subexp (struct type *expect_type,
 536                                       struct expression *exp,
 537                                       int *pos, enum noside noside);
 538
 539 extern struct value *evaluate_subexpression_type (struct expression *exp,
 540                                                   int subexp);
 541
 542 extern void fetch_subexp_value (struct expression *exp, int *pc,
 543                                 struct value **valp, struct value **resultp,
 544                                 struct value **val_chain);
 545
 546 extern char *extract_field_op (struct expression *exp, int *subexp);
 547
 548 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 549                                                     int *, enum noside);
 550
 551 extern struct value *parse_and_eval (char *exp);
 552
 553 extern struct value *parse_to_comma_and_eval (char **expp);
 554
 555 extern struct type *parse_and_eval_type (char *p, int length);
 556
 557 extern CORE_ADDR parse_and_eval_address (char *exp);
 558
 559 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 560
 561 extern LONGEST parse_and_eval_long (char *exp);
 562
 563 extern void unop_promote (const struct language_defn *language,
 564                           struct gdbarch *gdbarch,
 565                           struct value **arg1);
 566
 567 extern void binop_promote (const struct language_defn *language,
 568                            struct gdbarch *gdbarch,
 569                            struct value **arg1, struct value **arg2);
 570
 571 extern struct value *access_value_history (int num);
 572
 573 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 574                                            struct internalvar *var);
 575
 576 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 577
 578 extern void set_internalvar (struct internalvar *var, struct value *val);
 579
 580 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 581
 582 extern void set_internalvar_string (struct internalvar *var,
 583                                     const char *string);
 584
 585 extern void clear_internalvar (struct internalvar *var);
 586
 587 extern void set_internalvar_component (struct internalvar *var,
 588                                        int offset,
 589                                        int bitpos, int bitsize,
 590                                        struct value *newvalue);
 591
 592 extern struct internalvar *lookup_only_internalvar (const char *name);
 593
 594 extern struct internalvar *create_internalvar (const char *name);
 595
 596 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 597                                                   struct internalvar *);
 598 extern struct internalvar *
 599   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 600
 601 extern struct internalvar *lookup_internalvar (const char *name);
 602
 603 extern int value_equal (struct value *arg1, struct value *arg2);
 604
 605 extern int value_equal_contents (struct value *arg1, struct value *arg2);
 606
 607 extern int value_less (struct value *arg1, struct value *arg2);
 608
 609 extern int value_logical_not (struct value *arg1);
 610
 611 /* C++ */
 612
 613 extern struct value *value_of_this (int complain);
 614
 615 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 616                                     enum exp_opcode op,
 617                                     enum exp_opcode otherop,
 618                                     enum noside noside);
 619
 620 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 621                                    enum noside noside);
 622
 623 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 624                                      int j, struct type *type, int offset);
 625
 626 extern int binop_types_user_defined_p (enum exp_opcode op,
 627                                        struct type *type1,
 628                                        struct type *type2);
 629
 630 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 631                                  struct value *arg2);
 632
 633 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 634
 635 extern int destructor_name_p (const char *name, const struct type *type);
 636
 637 extern void value_incref (struct value *val);
 638
 639 extern void value_free (struct value *val);
 640
 641 extern void free_all_values (void);
 642
 643 extern void free_value_chain (struct value *v);
 644
 645 extern void release_value (struct value *val);
 646
 647 extern int record_latest_value (struct value *val);
 648
 649 extern void modify_field (struct type *type, gdb_byte *addr,
 650                           LONGEST fieldval, int bitpos, int bitsize);
 651
 652 extern void type_print (struct type *type, char *varstring,
 653                         struct ui_file *stream, int show);
 654
 655 extern char *type_to_string (struct type *type);
 656
 657 extern gdb_byte *baseclass_addr (struct type *type, int index,
 658                                  gdb_byte *valaddr,
 659                                  struct value **valuep, int *errp);
 660
 661 extern void print_longest (struct ui_file *stream, int format,
 662                            int use_local, LONGEST val);
 663
 664 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 665                             struct ui_file *stream);
 666
 667 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 668                                     struct ui_file *stream);
 669
 670 extern int value_print (struct value *val, struct ui_file *stream,
 671                         const struct value_print_options *options);
 672
 673 extern void value_print_array_elements (struct value *val,
 674                                         struct ui_file *stream, int format,
 675                                         enum val_prettyprint pretty);
 676
 677 extern struct value *value_release_to_mark (struct value *mark);
 678
 679 extern int val_print (struct type *type, const gdb_byte *valaddr,
 680                       int embedded_offset, CORE_ADDR address,
 681                       struct ui_file *stream, int recurse,
 682                       const struct value *val,
 683                       const struct value_print_options *options,
 684                       const struct language_defn *language);
 685
 686 extern int common_val_print (struct value *val,
 687                              struct ui_file *stream, int recurse,
 688                              const struct value_print_options *options,
 689                              const struct language_defn *language);
 690
 691 extern int val_print_string (struct type *elttype, const char *encoding,
 692                              CORE_ADDR addr, int len,
 693                              struct ui_file *stream,
 694                              const struct value_print_options *options);
 695
 696 extern void print_variable_and_value (const char *name,
 697                                       struct symbol *var,
 698                                       struct frame_info *frame,
 699                                       struct ui_file *stream,
 700                                       int indent);
 701
 702 extern int check_field (struct type *, const char *);
 703
 704 extern void typedef_print (struct type *type, struct symbol *news,
 705                            struct ui_file *stream);
 706
 707 extern char *internalvar_name (struct internalvar *var);
 708
 709 extern void preserve_values (struct objfile *);
 710
 711 /* From values.c */
 712
 713 extern struct value *value_copy (struct value *);
 714
 715 extern struct value *value_non_lval (struct value *);
 716
 717 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
 718
 719 /* From valops.c */
 720
 721 extern struct value *varying_to_slice (struct value *);
 722
 723 extern struct value *value_slice (struct value *, int, int);
 724
 725 extern struct value *value_literal_complex (struct value *, struct value *,
 726                                             struct type *);
 727
 728 extern struct value *find_function_in_inferior (const char *,
 729                                                 struct objfile **);
 730
 731 extern struct value *value_allocate_space_in_inferior (int);
 732
 733 extern struct value *value_of_local (const char *name, int complain);
 734
 735 extern struct value *value_subscripted_rvalue (struct value *array,
 736                                                LONGEST index, int lowerbound);
 737
 738 /* User function handler.  */
 739
 740 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
 741                                                const struct language_defn *language,
 742                                                void *cookie,
 743                                                int argc,
 744                                                struct value **argv);
 745
 746 void add_internal_function (const char *name, const char *doc,
 747                             internal_function_fn handler,
 748                             void *cookie);
 749
 750 struct value *call_internal_function (struct gdbarch *gdbarch,
 751                                       const struct language_defn *language,
 752                                       struct value *function,
 753                                       int argc, struct value **argv);
 754
 755 char *value_internal_function_name (struct value *);
 756
 757 #endif /* !defined (VALUE_H) */