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, 2011 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   /* If non-NULL, this is used to implement pointer indirection for
 177      this value.  This method may return NULL, in which case value_ind
 178      will fall back to ordinary indirection.  */
 179   struct value *(*indirect) (struct value *value);
 180
 181   /* If non-NULL, this is used to determine whether the indicated bits
 182      of VALUE are a synthetic pointer.  */
 183   int (*check_synthetic_pointer) (const struct value *value,
 184                                   int offset, int length);
 185
 186   /* Return a duplicate of VALUE's closure, for use in a new value.
 187      This may simply return the same closure, if VALUE's is
 188      reference-counted or statically allocated.
 189
 190      This may be NULL, in which case VALUE's closure is re-used in the
 191      new value.  */
 192   void *(*copy_closure) (const struct value *v);
 193
 194   /* Drop VALUE's reference to its closure.  Maybe this frees the
 195      closure; maybe this decrements a reference count; maybe the
 196      closure is statically allocated and this does nothing.
 197
 198      This may be NULL, in which case no action is taken to free
 199      VALUE's closure.  */
 200   void (*free_closure) (struct value *v);
 201 };
 202
 203 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
 204    and closure CLOSURE.  */
 205
 206 extern struct value *allocate_computed_value (struct type *type,
 207                                               struct lval_funcs *funcs,
 208                                               void *closure);
 209
 210 /* If VALUE is lval_computed, return its lval_funcs structure.  */
 211
 212 extern struct lval_funcs *value_computed_funcs (struct value *value);
 213
 214 /* If VALUE is lval_computed, return its closure.  The meaning of the
 215    returned value depends on the functions VALUE uses.  */
 216
 217 extern void *value_computed_closure (const struct value *value);
 218
 219 /* If zero, contents of this value are in the contents field.  If
 220    nonzero, contents are in inferior.  If the lval field is lval_memory,
 221    the contents are in inferior memory at location.address plus offset.
 222    The lval field may also be lval_register.
 223
 224    WARNING: This field is used by the code which handles watchpoints
 225    (see breakpoint.c) to decide whether a particular value can be
 226    watched by hardware watchpoints.  If the lazy flag is set for some
 227    member of a value chain, it is assumed that this member of the
 228    chain doesn't need to be watched as part of watching the value
 229    itself.  This is how GDB avoids watching the entire struct or array
 230    when the user wants to watch a single struct member or array
 231    element.  If you ever change the way lazy flag is set and reset, be
 232    sure to consider this use as well!  */
 233
 234 extern int value_lazy (struct value *);
 235 extern void set_value_lazy (struct value *value, int val);
 236
 237 extern int value_stack (struct value *);
 238 extern void set_value_stack (struct value *value, int val);
 239
 240 /* value_contents() and value_contents_raw() both return the address
 241    of the gdb buffer used to hold a copy of the contents of the lval.
 242    value_contents() is used when the contents of the buffer are needed
 243    -- it uses value_fetch_lazy() to load the buffer from the process
 244    being debugged if it hasn't already been loaded
 245    (value_contents_writeable() is used when a writeable but fetched
 246    buffer is required)..  value_contents_raw() is used when data is
 247    being stored into the buffer, or when it is certain that the
 248    contents of the buffer are valid.
 249
 250    Note: The contents pointer is adjusted by the offset required to
 251    get to the real subobject, if the value happens to represent
 252    something embedded in a larger run-time object.  */
 253
 254 extern gdb_byte *value_contents_raw (struct value *);
 255
 256 /* Actual contents of the value.  For use of this value; setting it
 257    uses the stuff above.  Not valid if lazy is nonzero.  Target
 258    byte-order.  We force it to be aligned properly for any possible
 259    value.  Note that a value therefore extends beyond what is
 260    declared here.  */
 261
 262 extern const gdb_byte *value_contents (struct value *);
 263 extern gdb_byte *value_contents_writeable (struct value *);
 264
 265 /* The ALL variants of the above two macros do not adjust the returned
 266    pointer by the embedded_offset value.  */
 267
 268 extern gdb_byte *value_contents_all_raw (struct value *);
 269 extern const gdb_byte *value_contents_all (struct value *);
 270
 271 /* Like value_contents_all, but does not require that the returned
 272    bits be valid.  This should only be used in situations where you
 273    plan to check the validity manually.  */
 274 extern const gdb_byte *value_contents_for_printing (struct value *value);
 275
 276 extern int value_fetch_lazy (struct value *val);
 277 extern int value_contents_equal (struct value *val1, struct value *val2);
 278
 279 /* If nonzero, this is the value of a variable which does not actually
 280    exist in the program.  */
 281 extern int value_optimized_out (struct value *value);
 282 extern void set_value_optimized_out (struct value *value, int val);
 283
 284 /* Like value_optimized_out, but return false if any bit in the object
 285    is valid.  */
 286 extern int value_entirely_optimized_out (const struct value *value);
 287
 288 /* Set or return field indicating whether a variable is initialized or
 289    not, based on debugging information supplied by the compiler.
 290    1 = initialized; 0 = uninitialized.  */
 291 extern int value_initialized (struct value *);
 292 extern void set_value_initialized (struct value *, int);
 293
 294 /* Set COMPONENT's location as appropriate for a component of WHOLE
 295    --- regardless of what kind of lvalue WHOLE is.  */
 296 extern void set_value_component_location (struct value *component,
 297                                           const struct value *whole);
 298
 299 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 300    single value might have multiple LVALs), this hacked interface is
 301    limited to just the first PIECE.  Expect further change.  */
 302 /* Type of value; either not an lval, or one of the various different
 303    possible kinds of lval.  */
 304 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 305 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 306
 307 /* If lval == lval_memory, return the address in the inferior.  If
 308    lval == lval_register, return the byte offset into the registers
 309    structure.  Otherwise, return 0.  The returned address
 310    includes the offset, if any.  */
 311 extern CORE_ADDR value_address (struct value *);
 312
 313 /* Like value_address, except the result does not include value's
 314    offset.  */
 315 extern CORE_ADDR value_raw_address (struct value *);
 316
 317 /* Set the address of a value.  */
 318 extern void set_value_address (struct value *, CORE_ADDR);
 319
 320 /* Pointer to internal variable.  */
 321 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 322 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 323
 324 /* Frame register value is relative to.  This will be described in the
 325    lval enum above as "lval_register".  */
 326 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 327 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 328
 329 /* Register number if the value is from a register.  */
 330 extern short *deprecated_value_regnum_hack (struct value *);
 331 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 332
 333 /* Convert a REF to the object referenced.  */
 334
 335 extern struct value *coerce_ref (struct value *value);
 336
 337 /* If ARG is an array, convert it to a pointer.
 338    If ARG is a function, convert it to a function pointer.
 339
 340    References are dereferenced.  */
 341
 342 extern struct value *coerce_array (struct value *value);
 343
 344 /* Given a value, determine whether the bits starting at OFFSET and
 345    extending for LENGTH bits are valid.  This returns nonzero if all
 346    bits in the given range are valid, zero if any bit is invalid.  */
 347
 348 extern int value_bits_valid (const struct value *value,
 349                              int offset, int length);
 350
 351 /* Given a value, determine whether the bits starting at OFFSET and
 352    extending for LENGTH bits are a synthetic pointer.  */
 353
 354 extern int value_bits_synthetic_pointer (const struct value *value,
 355                                          int offset, int length);
 356
 357 \f
 358
 359 #include "symtab.h"
 360 #include "gdbtypes.h"
 361 #include "expression.h"
 362
 363 struct frame_info;
 364 struct fn_field;
 365
 366 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
 367                                     struct ui_file *, int);
 368
 369 extern LONGEST value_as_long (struct value *val);
 370 extern DOUBLEST value_as_double (struct value *val);
 371 extern CORE_ADDR value_as_address (struct value *val);
 372
 373 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 374 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 375                                int *invp);
 376 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 377 LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
 378                              int bitpos, int bitsize);
 379 extern LONGEST unpack_field_as_long (struct type *type,
 380                                      const gdb_byte *valaddr,
 381                                      int fieldno);
 382
 383 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 384
 385 extern struct value *value_from_longest (struct type *type, LONGEST num);
 386 extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
 387 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 388 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 389 extern struct value *value_from_decfloat (struct type *type,
 390                                           const gdb_byte *decbytes);
 391
 392 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 393 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 394
 395 extern struct value *value_from_contents_and_address (struct type *,
 396                                                       const gdb_byte *,
 397                                                       CORE_ADDR);
 398
 399 extern struct value *default_value_from_register (struct type *type,
 400                                                   int regnum,
 401                                                   struct frame_info *frame);
 402
 403 extern struct value *value_from_register (struct type *type, int regnum,
 404                                           struct frame_info *frame);
 405
 406 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 407                                         struct frame_info *frame);
 408
 409 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 410
 411 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 412
 413 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 414
 415 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 416
 417 extern int symbol_read_needs_frame (struct symbol *);
 418
 419 extern struct value *read_var_value (struct symbol *var,
 420                                      struct frame_info *frame);
 421
 422 extern struct value *allocate_value (struct type *type);
 423 extern struct value *allocate_value_lazy (struct type *type);
 424 extern void allocate_value_contents (struct value *value);
 425
 426 extern struct value *allocate_repeat_value (struct type *type, int count);
 427
 428 extern struct value *value_mark (void);
 429
 430 extern void value_free_to_mark (struct value *mark);
 431
 432 extern struct value *value_cstring (char *ptr, int len,
 433                                     struct type *char_type);
 434 extern struct value *value_string (char *ptr, int len,
 435                                    struct type *char_type);
 436 extern struct value *value_bitstring (char *ptr, int len,
 437                                       struct type *index_type);
 438
 439 extern struct value *value_array (int lowbound, int highbound,
 440                                   struct value **elemvec);
 441
 442 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 443
 444 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 445                                   enum exp_opcode op);
 446
 447 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 448
 449 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 450
 451 extern int value_must_coerce_to_target (struct value *arg1);
 452
 453 extern struct value *value_coerce_to_target (struct value *arg1);
 454
 455 extern struct value *value_coerce_array (struct value *arg1);
 456
 457 extern struct value *value_coerce_function (struct value *arg1);
 458
 459 extern struct value *value_ind (struct value *arg1);
 460
 461 extern struct value *value_addr (struct value *arg1);
 462
 463 extern struct value *value_ref (struct value *arg1);
 464
 465 extern struct value *value_assign (struct value *toval,
 466                                    struct value *fromval);
 467
 468 extern struct value *value_pos (struct value *arg1);
 469
 470 extern struct value *value_neg (struct value *arg1);
 471
 472 extern struct value *value_complement (struct value *arg1);
 473
 474 extern struct value *value_struct_elt (struct value **argp,
 475                                        struct value **args,
 476                                        const char *name, int *static_memfuncp,
 477                                        const char *err);
 478
 479 extern struct value *value_aggregate_elt (struct type *curtype,
 480                                           char *name,
 481                                           struct type *expect_type,
 482                                           int want_address,
 483                                           enum noside noside);
 484
 485 extern struct value *value_static_field (struct type *type, int fieldno);
 486
 487 extern struct fn_field *value_find_oload_method_list (struct value **,
 488                                                       const char *,
 489                                                       int, int *,
 490                                                       struct type **, int *);
 491
 492 enum oload_search_type { NON_METHOD, METHOD, BOTH };
 493
 494 extern int find_overload_match (struct type **arg_types, int nargs,
 495                                 const char *name,
 496                                 enum oload_search_type method, int lax,
 497                                 struct value **objp, struct symbol *fsym,
 498                                 struct value **valp, struct symbol **symp,
 499                                 int *staticp, const int no_adl);
 500
 501 extern struct value *value_field (struct value *arg1, int fieldno);
 502
 503 extern struct value *value_primitive_field (struct value *arg1, int offset,
 504                                             int fieldno,
 505                                             struct type *arg_type);
 506
 507
 508 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 509                                             int *);
 510
 511 extern struct value *value_full_object (struct value *, struct type *, int,
 512                                         int, int);
 513
 514 extern struct value *value_cast_pointers (struct type *, struct value *);
 515
 516 extern struct value *value_cast (struct type *type, struct value *arg2);
 517
 518 extern struct value *value_reinterpret_cast (struct type *type,
 519                                              struct value *arg);
 520
 521 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
 522
 523 extern struct value *value_zero (struct type *type, enum lval_type lv);
 524
 525 extern struct value *value_one (struct type *type, enum lval_type lv);
 526
 527 extern struct value *value_repeat (struct value *arg1, int count);
 528
 529 extern struct value *value_subscript (struct value *array, LONGEST index);
 530
 531 extern struct value *value_bitstring_subscript (struct type *type,
 532                                                 struct value *bitstring,
 533                                                 LONGEST index);
 534
 535 extern struct value *register_value_being_returned (struct type *valtype,
 536                                                     struct regcache *retbuf);
 537
 538 extern int value_in (struct value *element, struct value *set);
 539
 540 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 541                             int index);
 542
 543 extern int using_struct_return (struct gdbarch *gdbarch,
 544                                 struct type *func_type,
 545                                 struct type *value_type);
 546
 547 extern struct value *evaluate_expression (struct expression *exp);
 548
 549 extern struct value *evaluate_type (struct expression *exp);
 550
 551 extern struct value *evaluate_subexp (struct type *expect_type,
 552                                       struct expression *exp,
 553                                       int *pos, enum noside noside);
 554
 555 extern struct value *evaluate_subexpression_type (struct expression *exp,
 556                                                   int subexp);
 557
 558 extern void fetch_subexp_value (struct expression *exp, int *pc,
 559                                 struct value **valp, struct value **resultp,
 560                                 struct value **val_chain);
 561
 562 extern char *extract_field_op (struct expression *exp, int *subexp);
 563
 564 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 565                                                     int *, enum noside);
 566
 567 extern struct value *parse_and_eval (char *exp);
 568
 569 extern struct value *parse_to_comma_and_eval (char **expp);
 570
 571 extern struct type *parse_and_eval_type (char *p, int length);
 572
 573 extern CORE_ADDR parse_and_eval_address (char *exp);
 574
 575 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 576
 577 extern LONGEST parse_and_eval_long (char *exp);
 578
 579 extern void unop_promote (const struct language_defn *language,
 580                           struct gdbarch *gdbarch,
 581                           struct value **arg1);
 582
 583 extern void binop_promote (const struct language_defn *language,
 584                            struct gdbarch *gdbarch,
 585                            struct value **arg1, struct value **arg2);
 586
 587 extern struct value *access_value_history (int num);
 588
 589 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 590                                            struct internalvar *var);
 591
 592 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 593
 594 extern void set_internalvar (struct internalvar *var, struct value *val);
 595
 596 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 597
 598 extern void set_internalvar_string (struct internalvar *var,
 599                                     const char *string);
 600
 601 extern void clear_internalvar (struct internalvar *var);
 602
 603 extern void set_internalvar_component (struct internalvar *var,
 604                                        int offset,
 605                                        int bitpos, int bitsize,
 606                                        struct value *newvalue);
 607
 608 extern struct internalvar *lookup_only_internalvar (const char *name);
 609
 610 extern struct internalvar *create_internalvar (const char *name);
 611
 612 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 613                                                   struct internalvar *);
 614 extern struct internalvar *
 615   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 616
 617 extern struct internalvar *lookup_internalvar (const char *name);
 618
 619 extern int value_equal (struct value *arg1, struct value *arg2);
 620
 621 extern int value_equal_contents (struct value *arg1, struct value *arg2);
 622
 623 extern int value_less (struct value *arg1, struct value *arg2);
 624
 625 extern int value_logical_not (struct value *arg1);
 626
 627 /* C++ */
 628
 629 extern struct value *value_of_this (int complain);
 630
 631 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 632                                     enum exp_opcode op,
 633                                     enum exp_opcode otherop,
 634                                     enum noside noside);
 635
 636 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 637                                    enum noside noside);
 638
 639 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 640                                      int j, struct type *type, int offset);
 641
 642 extern int binop_types_user_defined_p (enum exp_opcode op,
 643                                        struct type *type1,
 644                                        struct type *type2);
 645
 646 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 647                                  struct value *arg2);
 648
 649 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 650
 651 extern int destructor_name_p (const char *name, const struct type *type);
 652
 653 extern void value_incref (struct value *val);
 654
 655 extern void value_free (struct value *val);
 656
 657 extern void free_all_values (void);
 658
 659 extern void free_value_chain (struct value *v);
 660
 661 extern void release_value (struct value *val);
 662
 663 extern int record_latest_value (struct value *val);
 664
 665 extern void modify_field (struct type *type, gdb_byte *addr,
 666                           LONGEST fieldval, int bitpos, int bitsize);
 667
 668 extern void type_print (struct type *type, char *varstring,
 669                         struct ui_file *stream, int show);
 670
 671 extern char *type_to_string (struct type *type);
 672
 673 extern gdb_byte *baseclass_addr (struct type *type, int index,
 674                                  gdb_byte *valaddr,
 675                                  struct value **valuep, int *errp);
 676
 677 extern void print_longest (struct ui_file *stream, int format,
 678                            int use_local, LONGEST val);
 679
 680 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 681                             struct ui_file *stream);
 682
 683 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 684                                     struct ui_file *stream);
 685
 686 extern int value_print (struct value *val, struct ui_file *stream,
 687                         const struct value_print_options *options);
 688
 689 extern void value_print_array_elements (struct value *val,
 690                                         struct ui_file *stream, int format,
 691                                         enum val_prettyprint pretty);
 692
 693 extern struct value *value_release_to_mark (struct value *mark);
 694
 695 extern int val_print (struct type *type, const gdb_byte *valaddr,
 696                       int embedded_offset, CORE_ADDR address,
 697                       struct ui_file *stream, int recurse,
 698                       const struct value *val,
 699                       const struct value_print_options *options,
 700                       const struct language_defn *language);
 701
 702 extern int common_val_print (struct value *val,
 703                              struct ui_file *stream, int recurse,
 704                              const struct value_print_options *options,
 705                              const struct language_defn *language);
 706
 707 extern int val_print_string (struct type *elttype, const char *encoding,
 708                              CORE_ADDR addr, int len,
 709                              struct ui_file *stream,
 710                              const struct value_print_options *options);
 711
 712 extern void print_variable_and_value (const char *name,
 713                                       struct symbol *var,
 714                                       struct frame_info *frame,
 715                                       struct ui_file *stream,
 716                                       int indent);
 717
 718 extern int check_field (struct type *, const char *);
 719
 720 extern void typedef_print (struct type *type, struct symbol *news,
 721                            struct ui_file *stream);
 722
 723 extern char *internalvar_name (struct internalvar *var);
 724
 725 extern void preserve_values (struct objfile *);
 726
 727 /* From values.c */
 728
 729 extern struct value *value_copy (struct value *);
 730
 731 extern struct value *value_non_lval (struct value *);
 732
 733 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
 734
 735 /* From valops.c */
 736
 737 extern struct value *varying_to_slice (struct value *);
 738
 739 extern struct value *value_slice (struct value *, int, int);
 740
 741 extern struct value *value_literal_complex (struct value *, struct value *,
 742                                             struct type *);
 743
 744 extern struct value *find_function_in_inferior (const char *,
 745                                                 struct objfile **);
 746
 747 extern struct value *value_allocate_space_in_inferior (int);
 748
 749 extern struct value *value_of_local (const char *name, int complain);
 750
 751 extern struct value *value_subscripted_rvalue (struct value *array,
 752                                                LONGEST index, int lowerbound);
 753
 754 /* User function handler.  */
 755
 756 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
 757                                                const struct language_defn *language,
 758                                                void *cookie,
 759                                                int argc,
 760                                                struct value **argv);
 761
 762 void add_internal_function (const char *name, const char *doc,
 763                             internal_function_fn handler,
 764                             void *cookie);
 765
 766 struct value *call_internal_function (struct gdbarch *gdbarch,
 767                                       const struct language_defn *language,
 768                                       struct value *function,
 769                                       int argc, struct value **argv);
 770
 771 char *value_internal_function_name (struct value *);
 772
 773 #endif /* !defined (VALUE_H) */