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 /* Like value_contents_for_printing, but accepts a constant value
 277    pointer.  Unlike value_contents_for_printing however, the pointed
 278    value must _not_ be lazy.  */
 279 extern const gdb_byte *
 280   value_contents_for_printing_const (const struct value *value);
 281
 282 extern int value_fetch_lazy (struct value *val);
 283 extern int value_contents_equal (struct value *val1, struct value *val2);
 284
 285 /* If nonzero, this is the value of a variable which does not actually
 286    exist in the program.  */
 287 extern int value_optimized_out (struct value *value);
 288 extern void set_value_optimized_out (struct value *value, int val);
 289
 290 /* Like value_optimized_out, but return false if any bit in the object
 291    is valid.  */
 292 extern int value_entirely_optimized_out (const struct value *value);
 293
 294 /* Set or return field indicating whether a variable is initialized or
 295    not, based on debugging information supplied by the compiler.
 296    1 = initialized; 0 = uninitialized.  */
 297 extern int value_initialized (struct value *);
 298 extern void set_value_initialized (struct value *, int);
 299
 300 /* Set COMPONENT's location as appropriate for a component of WHOLE
 301    --- regardless of what kind of lvalue WHOLE is.  */
 302 extern void set_value_component_location (struct value *component,
 303                                           const struct value *whole);
 304
 305 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 306    single value might have multiple LVALs), this hacked interface is
 307    limited to just the first PIECE.  Expect further change.  */
 308 /* Type of value; either not an lval, or one of the various different
 309    possible kinds of lval.  */
 310 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 311 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 312
 313 /* If lval == lval_memory, return the address in the inferior.  If
 314    lval == lval_register, return the byte offset into the registers
 315    structure.  Otherwise, return 0.  The returned address
 316    includes the offset, if any.  */
 317 extern CORE_ADDR value_address (const struct value *);
 318
 319 /* Like value_address, except the result does not include value's
 320    offset.  */
 321 extern CORE_ADDR value_raw_address (struct value *);
 322
 323 /* Set the address of a value.  */
 324 extern void set_value_address (struct value *, CORE_ADDR);
 325
 326 /* Pointer to internal variable.  */
 327 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 328 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 329
 330 /* Frame register value is relative to.  This will be described in the
 331    lval enum above as "lval_register".  */
 332 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 333 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 334
 335 /* Register number if the value is from a register.  */
 336 extern short *deprecated_value_regnum_hack (struct value *);
 337 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 338
 339 /* Convert a REF to the object referenced.  */
 340
 341 extern struct value *coerce_ref (struct value *value);
 342
 343 /* If ARG is an array, convert it to a pointer.
 344    If ARG is a function, convert it to a function pointer.
 345
 346    References are dereferenced.  */
 347
 348 extern struct value *coerce_array (struct value *value);
 349
 350 /* Given a value, determine whether the bits starting at OFFSET and
 351    extending for LENGTH bits are valid.  This returns nonzero if all
 352    bits in the given range are valid, zero if any bit is invalid.  */
 353
 354 extern int value_bits_valid (const struct value *value,
 355                              int offset, int length);
 356
 357 /* Given a value, determine whether the bits starting at OFFSET and
 358    extending for LENGTH bits are a synthetic pointer.  */
 359
 360 extern int value_bits_synthetic_pointer (const struct value *value,
 361                                          int offset, int length);
 362
 363 \f
 364
 365 #include "symtab.h"
 366 #include "gdbtypes.h"
 367 #include "expression.h"
 368
 369 struct frame_info;
 370 struct fn_field;
 371
 372 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
 373                                     struct ui_file *, int);
 374
 375 extern LONGEST value_as_long (struct value *val);
 376 extern DOUBLEST value_as_double (struct value *val);
 377 extern CORE_ADDR value_as_address (struct value *val);
 378
 379 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 380 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 381                                int *invp);
 382 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 383 LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
 384                              int bitpos, int bitsize);
 385 extern LONGEST unpack_field_as_long (struct type *type,
 386                                      const gdb_byte *valaddr,
 387                                      int fieldno);
 388
 389 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 390
 391 extern struct value *value_from_longest (struct type *type, LONGEST num);
 392 extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
 393 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 394 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 395 extern struct value *value_from_decfloat (struct type *type,
 396                                           const gdb_byte *decbytes);
 397
 398 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 399 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 400
 401 extern struct value *value_from_contents_and_address (struct type *,
 402                                                       const gdb_byte *,
 403                                                       CORE_ADDR);
 404
 405 extern struct value *default_value_from_register (struct type *type,
 406                                                   int regnum,
 407                                                   struct frame_info *frame);
 408
 409 extern struct value *value_from_register (struct type *type, int regnum,
 410                                           struct frame_info *frame);
 411
 412 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 413                                         struct frame_info *frame);
 414
 415 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 416
 417 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 418
 419 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 420
 421 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 422
 423 extern int symbol_read_needs_frame (struct symbol *);
 424
 425 extern struct value *read_var_value (struct symbol *var,
 426                                      struct frame_info *frame);
 427
 428 extern struct value *allocate_value (struct type *type);
 429 extern struct value *allocate_value_lazy (struct type *type);
 430 extern void allocate_value_contents (struct value *value);
 431
 432 extern struct value *allocate_repeat_value (struct type *type, int count);
 433
 434 extern struct value *value_mark (void);
 435
 436 extern void value_free_to_mark (struct value *mark);
 437
 438 extern struct value *value_cstring (char *ptr, int len,
 439                                     struct type *char_type);
 440 extern struct value *value_string (char *ptr, int len,
 441                                    struct type *char_type);
 442 extern struct value *value_bitstring (char *ptr, int len,
 443                                       struct type *index_type);
 444
 445 extern struct value *value_array (int lowbound, int highbound,
 446                                   struct value **elemvec);
 447
 448 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 449
 450 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 451                                   enum exp_opcode op);
 452
 453 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 454
 455 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 456
 457 extern int value_must_coerce_to_target (struct value *arg1);
 458
 459 extern struct value *value_coerce_to_target (struct value *arg1);
 460
 461 extern struct value *value_coerce_array (struct value *arg1);
 462
 463 extern struct value *value_coerce_function (struct value *arg1);
 464
 465 extern struct value *value_ind (struct value *arg1);
 466
 467 extern struct value *value_addr (struct value *arg1);
 468
 469 extern struct value *value_ref (struct value *arg1);
 470
 471 extern struct value *value_assign (struct value *toval,
 472                                    struct value *fromval);
 473
 474 extern struct value *value_pos (struct value *arg1);
 475
 476 extern struct value *value_neg (struct value *arg1);
 477
 478 extern struct value *value_complement (struct value *arg1);
 479
 480 extern struct value *value_struct_elt (struct value **argp,
 481                                        struct value **args,
 482                                        const char *name, int *static_memfuncp,
 483                                        const char *err);
 484
 485 extern struct value *value_aggregate_elt (struct type *curtype,
 486                                           char *name,
 487                                           struct type *expect_type,
 488                                           int want_address,
 489                                           enum noside noside);
 490
 491 extern struct value *value_static_field (struct type *type, int fieldno);
 492
 493 extern struct fn_field *value_find_oload_method_list (struct value **,
 494                                                       const char *,
 495                                                       int, int *,
 496                                                       struct type **, int *);
 497
 498 enum oload_search_type { NON_METHOD, METHOD, BOTH };
 499
 500 extern int find_overload_match (struct type **arg_types, int nargs,
 501                                 const char *name,
 502                                 enum oload_search_type method, int lax,
 503                                 struct value **objp, struct symbol *fsym,
 504                                 struct value **valp, struct symbol **symp,
 505                                 int *staticp, const int no_adl);
 506
 507 extern struct value *value_field (struct value *arg1, int fieldno);
 508
 509 extern struct value *value_primitive_field (struct value *arg1, int offset,
 510                                             int fieldno,
 511                                             struct type *arg_type);
 512
 513
 514 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 515                                             int *);
 516
 517 extern struct value *value_full_object (struct value *, struct type *, int,
 518                                         int, int);
 519
 520 extern struct value *value_cast_pointers (struct type *, struct value *);
 521
 522 extern struct value *value_cast (struct type *type, struct value *arg2);
 523
 524 extern struct value *value_reinterpret_cast (struct type *type,
 525                                              struct value *arg);
 526
 527 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
 528
 529 extern struct value *value_zero (struct type *type, enum lval_type lv);
 530
 531 extern struct value *value_one (struct type *type, enum lval_type lv);
 532
 533 extern struct value *value_repeat (struct value *arg1, int count);
 534
 535 extern struct value *value_subscript (struct value *array, LONGEST index);
 536
 537 extern struct value *value_bitstring_subscript (struct type *type,
 538                                                 struct value *bitstring,
 539                                                 LONGEST index);
 540
 541 extern struct value *register_value_being_returned (struct type *valtype,
 542                                                     struct regcache *retbuf);
 543
 544 extern int value_in (struct value *element, struct value *set);
 545
 546 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 547                             int index);
 548
 549 extern int using_struct_return (struct gdbarch *gdbarch,
 550                                 struct type *func_type,
 551                                 struct type *value_type);
 552
 553 extern struct value *evaluate_expression (struct expression *exp);
 554
 555 extern struct value *evaluate_type (struct expression *exp);
 556
 557 extern struct value *evaluate_subexp (struct type *expect_type,
 558                                       struct expression *exp,
 559                                       int *pos, enum noside noside);
 560
 561 extern struct value *evaluate_subexpression_type (struct expression *exp,
 562                                                   int subexp);
 563
 564 extern void fetch_subexp_value (struct expression *exp, int *pc,
 565                                 struct value **valp, struct value **resultp,
 566                                 struct value **val_chain);
 567
 568 extern char *extract_field_op (struct expression *exp, int *subexp);
 569
 570 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 571                                                     int *, enum noside);
 572
 573 extern struct value *parse_and_eval (char *exp);
 574
 575 extern struct value *parse_to_comma_and_eval (char **expp);
 576
 577 extern struct type *parse_and_eval_type (char *p, int length);
 578
 579 extern CORE_ADDR parse_and_eval_address (char *exp);
 580
 581 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 582
 583 extern LONGEST parse_and_eval_long (char *exp);
 584
 585 extern void unop_promote (const struct language_defn *language,
 586                           struct gdbarch *gdbarch,
 587                           struct value **arg1);
 588
 589 extern void binop_promote (const struct language_defn *language,
 590                            struct gdbarch *gdbarch,
 591                            struct value **arg1, struct value **arg2);
 592
 593 extern struct value *access_value_history (int num);
 594
 595 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 596                                            struct internalvar *var);
 597
 598 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 599
 600 extern void set_internalvar (struct internalvar *var, struct value *val);
 601
 602 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 603
 604 extern void set_internalvar_string (struct internalvar *var,
 605                                     const char *string);
 606
 607 extern void clear_internalvar (struct internalvar *var);
 608
 609 extern void set_internalvar_component (struct internalvar *var,
 610                                        int offset,
 611                                        int bitpos, int bitsize,
 612                                        struct value *newvalue);
 613
 614 extern struct internalvar *lookup_only_internalvar (const char *name);
 615
 616 extern struct internalvar *create_internalvar (const char *name);
 617
 618 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 619                                                   struct internalvar *);
 620 extern struct internalvar *
 621   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 622
 623 extern struct internalvar *lookup_internalvar (const char *name);
 624
 625 extern int value_equal (struct value *arg1, struct value *arg2);
 626
 627 extern int value_equal_contents (struct value *arg1, struct value *arg2);
 628
 629 extern int value_less (struct value *arg1, struct value *arg2);
 630
 631 extern int value_logical_not (struct value *arg1);
 632
 633 /* C++ */
 634
 635 extern struct value *value_of_this (int complain);
 636
 637 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 638                                     enum exp_opcode op,
 639                                     enum exp_opcode otherop,
 640                                     enum noside noside);
 641
 642 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 643                                    enum noside noside);
 644
 645 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 646                                      int j, struct type *type, int offset);
 647
 648 extern int binop_types_user_defined_p (enum exp_opcode op,
 649                                        struct type *type1,
 650                                        struct type *type2);
 651
 652 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 653                                  struct value *arg2);
 654
 655 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 656
 657 extern int destructor_name_p (const char *name, const struct type *type);
 658
 659 extern void value_incref (struct value *val);
 660
 661 extern void value_free (struct value *val);
 662
 663 extern void free_all_values (void);
 664
 665 extern void free_value_chain (struct value *v);
 666
 667 extern void release_value (struct value *val);
 668
 669 extern int record_latest_value (struct value *val);
 670
 671 extern void modify_field (struct type *type, gdb_byte *addr,
 672                           LONGEST fieldval, int bitpos, int bitsize);
 673
 674 extern void type_print (struct type *type, char *varstring,
 675                         struct ui_file *stream, int show);
 676
 677 extern char *type_to_string (struct type *type);
 678
 679 extern gdb_byte *baseclass_addr (struct type *type, int index,
 680                                  gdb_byte *valaddr,
 681                                  struct value **valuep, int *errp);
 682
 683 extern void print_longest (struct ui_file *stream, int format,
 684                            int use_local, LONGEST val);
 685
 686 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 687                             struct ui_file *stream);
 688
 689 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 690                                     struct ui_file *stream);
 691
 692 extern int value_print (struct value *val, struct ui_file *stream,
 693                         const struct value_print_options *options);
 694
 695 extern void value_print_array_elements (struct value *val,
 696                                         struct ui_file *stream, int format,
 697                                         enum val_prettyprint pretty);
 698
 699 extern struct value *value_release_to_mark (struct value *mark);
 700
 701 extern int val_print (struct type *type, const gdb_byte *valaddr,
 702                       int embedded_offset, CORE_ADDR address,
 703                       struct ui_file *stream, int recurse,
 704                       const struct value *val,
 705                       const struct value_print_options *options,
 706                       const struct language_defn *language);
 707
 708 extern int common_val_print (struct value *val,
 709                              struct ui_file *stream, int recurse,
 710                              const struct value_print_options *options,
 711                              const struct language_defn *language);
 712
 713 extern int val_print_string (struct type *elttype, const char *encoding,
 714                              CORE_ADDR addr, int len,
 715                              struct ui_file *stream,
 716                              const struct value_print_options *options);
 717
 718 extern void print_variable_and_value (const char *name,
 719                                       struct symbol *var,
 720                                       struct frame_info *frame,
 721                                       struct ui_file *stream,
 722                                       int indent);
 723
 724 extern int check_field (struct type *, const char *);
 725
 726 extern void typedef_print (struct type *type, struct symbol *news,
 727                            struct ui_file *stream);
 728
 729 extern char *internalvar_name (struct internalvar *var);
 730
 731 extern void preserve_values (struct objfile *);
 732
 733 /* From values.c */
 734
 735 extern struct value *value_copy (struct value *);
 736
 737 extern struct value *value_non_lval (struct value *);
 738
 739 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
 740
 741 /* From valops.c */
 742
 743 extern struct value *varying_to_slice (struct value *);
 744
 745 extern struct value *value_slice (struct value *, int, int);
 746
 747 extern struct value *value_literal_complex (struct value *, struct value *,
 748                                             struct type *);
 749
 750 extern struct value *find_function_in_inferior (const char *,
 751                                                 struct objfile **);
 752
 753 extern struct value *value_allocate_space_in_inferior (int);
 754
 755 extern struct value *value_of_local (const char *name, int complain);
 756
 757 extern struct value *value_subscripted_rvalue (struct value *array,
 758                                                LONGEST index, int lowerbound);
 759
 760 /* User function handler.  */
 761
 762 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
 763                                                const struct language_defn *language,
 764                                                void *cookie,
 765                                                int argc,
 766                                                struct value **argv);
 767
 768 void add_internal_function (const char *name, const char *doc,
 769                             internal_function_fn handler,
 770                             void *cookie);
 771
 772 struct value *call_internal_function (struct gdbarch *gdbarch,
 773                                       const struct language_defn *language,
 774                                       struct value *function,
 775                                       int argc, struct value **argv);
 776
 777 char *value_internal_function_name (struct value *);
 778
 779 #endif /* !defined (VALUE_H) */