gdb/value.h

   1 /* Definitions for values of C expressions, for GDB.
   2
   3    Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
   4    1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   5    2008, 2009, 2010 Free Software Foundation, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #if !defined (VALUE_H)
  23 #define VALUE_H 1
  24
  25 #include "doublest.h"
  26 #include "frame.h"              /* For struct frame_id.  */
  27
  28 struct block;
  29 struct expression;
  30 struct regcache;
  31 struct symbol;
  32 struct type;
  33 struct ui_file;
  34 struct language_defn;
  35 struct value_print_options;
  36
  37 /* The structure which defines the type of a value.  It should never
  38    be possible for a program lval value to survive over a call to the
  39    inferior (i.e. to be put into the history list or an internal
  40    variable).  */
  41
  42 struct value;
  43
  44 /* Values are stored in a chain, so that they can be deleted easily
  45    over calls to the inferior.  Values assigned to internal variables,
  46    put into the value history or exposed to Python are taken off this
  47    list.  */
  48
  49 struct value *value_next (struct value *);
  50
  51 /* Type of the value.  */
  52
  53 extern struct type *value_type (const struct value *);
  54
  55 /* This is being used to change the type of an existing value, that
  56    code should instead be creating a new value with the changed type
  57    (but possibly shared content).  */
  58
  59 extern void deprecated_set_value_type (struct value *value,
  60                                        struct type *type);
  61
  62 /* Only used for bitfields; number of bits contained in them.  */
  63
  64 extern int value_bitsize (const struct value *);
  65 extern void set_value_bitsize (struct value *, int bit);
  66
  67 /* Only used for bitfields; position of start of field.  For
  68    gdbarch_bits_big_endian=0 targets, it is the position of the LSB.  For
  69    gdbarch_bits_big_endian=1 targets, it is the position of the MSB.  */
  70
  71 extern int value_bitpos (const struct value *);
  72 extern void set_value_bitpos (struct value *, int bit);
  73
  74 /* Only used for bitfields; the containing value.  This allows a
  75    single read from the target when displaying multiple
  76    bitfields.  */
  77
  78 struct value *value_parent (struct value *);
  79
  80 /* Describes offset of a value within lval of a structure in bytes.
  81    If lval == lval_memory, this is an offset to the address.  If lval
  82    == lval_register, this is a further offset from location.address
  83    within the registers structure.  Note also the member
  84    embedded_offset below.  */
  85
  86 extern int value_offset (const struct value *);
  87 extern void set_value_offset (struct value *, int offset);
  88
  89 /* The comment from "struct value" reads: ``Is it modifiable?  Only
  90    relevant if lval != not_lval.''.  Shouldn't the value instead be
  91    not_lval and be done with it?  */
  92
  93 extern int deprecated_value_modifiable (struct value *value);
  94 extern void deprecated_set_value_modifiable (struct value *value,
  95                                              int modifiable);
  96
  97 /* If a value represents a C++ object, then the `type' field gives the
  98    object's compile-time type.  If the object actually belongs to some
  99    class derived from `type', perhaps with other base classes and
 100    additional members, then `type' is just a subobject of the real
 101    thing, and the full object is probably larger than `type' would
 102    suggest.
 103
 104    If `type' is a dynamic class (i.e. one with a vtable), then GDB can
 105    actually determine the object's run-time type by looking at the
 106    run-time type information in the vtable.  When this information is
 107    available, we may elect to read in the entire object, for several
 108    reasons:
 109
 110    - When printing the value, the user would probably rather see the
 111      full object, not just the limited portion apparent from the
 112      compile-time type.
 113
 114    - If `type' has virtual base classes, then even printing `type'
 115      alone may require reaching outside the `type' portion of the
 116      object to wherever the virtual base class has been stored.
 117
 118    When we store the entire object, `enclosing_type' is the run-time
 119    type -- the complete object -- and `embedded_offset' is the offset
 120    of `type' within that larger type, in bytes.  The value_contents()
 121    macro takes `embedded_offset' into account, so most GDB code
 122    continues to see the `type' portion of the value, just as the
 123    inferior would.
 124
 125    If `type' is a pointer to an object, then `enclosing_type' is a
 126    pointer to the object's run-time type, and `pointed_to_offset' is
 127    the offset in bytes from the full object to the pointed-to object
 128    -- that is, the value `embedded_offset' would have if we followed
 129    the pointer and fetched the complete object.  (I don't really see
 130    the point.  Why not just determine the run-time type when you
 131    indirect, and avoid the special case?  The contents don't matter
 132    until you indirect anyway.)
 133
 134    If we're not doing anything fancy, `enclosing_type' is equal to
 135    `type', and `embedded_offset' is zero, so everything works
 136    normally.  */
 137
 138 extern struct type *value_enclosing_type (struct value *);
 139 extern struct value *value_change_enclosing_type (struct value *val,
 140                                                   struct type *new_type);
 141 extern int value_pointed_to_offset (struct value *value);
 142 extern void set_value_pointed_to_offset (struct value *value, int val);
 143 extern int value_embedded_offset (struct value *value);
 144 extern void set_value_embedded_offset (struct value *value, int val);
 145
 146 /* For lval_computed values, this structure holds functions used to
 147    retrieve and set the value (or portions of the value).
 148
 149    For each function, 'V' is the 'this' pointer: an lval_funcs
 150    function F may always assume that the V it receives is an
 151    lval_computed value, and has F in the appropriate slot of its
 152    lval_funcs structure.  */
 153
 154 struct lval_funcs
 155 {
 156   /* Fill in VALUE's contents.  This is used to "un-lazy" values.  If
 157      a problem arises in obtaining VALUE's bits, this function should
 158      call 'error'.  */
 159   void (*read) (struct value *v);
 160
 161   /* Handle an assignment TOVAL = FROMVAL by writing the value of
 162      FROMVAL to TOVAL's location.  The contents of TOVAL have not yet
 163      been updated.  If a problem arises in doing so, this function
 164      should call 'error'.  */
 165   void (*write) (struct value *toval, struct value *fromval);
 166
 167   /* Check the validity of some bits in VALUE.  This should return 1
 168      if all the bits starting at OFFSET and extending for LENGTH bits
 169      are valid, or 0 if any bit is invalid.  */
 170   int (*check_validity) (const struct value *value, int offset, int length);
 171
 172   /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid.  */
 173   int (*check_all_valid) (const struct value *value);
 174
 175   /* Return a duplicate of VALUE's closure, for use in a new value.
 176      This may simply return the same closure, if VALUE's is
 177      reference-counted or statically allocated.
 178
 179      This may be NULL, in which case VALUE's closure is re-used in the
 180      new value.  */
 181   void *(*copy_closure) (const struct value *v);
 182
 183   /* Drop VALUE's reference to its closure.  Maybe this frees the
 184      closure; maybe this decrements a reference count; maybe the
 185      closure is statically allocated and this does nothing.
 186
 187      This may be NULL, in which case no action is taken to free
 188      VALUE's closure.  */
 189   void (*free_closure) (struct value *v);
 190 };
 191
 192 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
 193    and closure CLOSURE.  */
 194
 195 extern struct value *allocate_computed_value (struct type *type,
 196                                               struct lval_funcs *funcs,
 197                                               void *closure);
 198
 199 /* If VALUE is lval_computed, return its lval_funcs structure.  */
 200
 201 extern struct lval_funcs *value_computed_funcs (struct value *value);
 202
 203 /* If VALUE is lval_computed, return its closure.  The meaning of the
 204    returned value depends on the functions VALUE uses.  */
 205
 206 extern void *value_computed_closure (const struct value *value);
 207
 208 /* If zero, contents of this value are in the contents field.  If
 209    nonzero, contents are in inferior.  If the lval field is lval_memory,
 210    the contents are in inferior memory at location.address plus offset.
 211    The lval field may also be lval_register.
 212
 213    WARNING: This field is used by the code which handles watchpoints
 214    (see breakpoint.c) to decide whether a particular value can be
 215    watched by hardware watchpoints.  If the lazy flag is set for some
 216    member of a value chain, it is assumed that this member of the
 217    chain doesn't need to be watched as part of watching the value
 218    itself.  This is how GDB avoids watching the entire struct or array
 219    when the user wants to watch a single struct member or array
 220    element.  If you ever change the way lazy flag is set and reset, be
 221    sure to consider this use as well!  */
 222
 223 extern int value_lazy (struct value *);
 224 extern void set_value_lazy (struct value *value, int val);
 225
 226 extern int value_stack (struct value *);
 227 extern void set_value_stack (struct value *value, int val);
 228
 229 /* value_contents() and value_contents_raw() both return the address
 230    of the gdb buffer used to hold a copy of the contents of the lval.
 231    value_contents() is used when the contents of the buffer are needed
 232    -- it uses value_fetch_lazy() to load the buffer from the process
 233    being debugged if it hasn't already been loaded
 234    (value_contents_writeable() is used when a writeable but fetched
 235    buffer is required)..  value_contents_raw() is used when data is
 236    being stored into the buffer, or when it is certain that the
 237    contents of the buffer are valid.
 238
 239    Note: The contents pointer is adjusted by the offset required to
 240    get to the real subobject, if the value happens to represent
 241    something embedded in a larger run-time object.  */
 242
 243 extern gdb_byte *value_contents_raw (struct value *);
 244
 245 /* Actual contents of the value.  For use of this value; setting it
 246    uses the stuff above.  Not valid if lazy is nonzero.  Target
 247    byte-order.  We force it to be aligned properly for any possible
 248    value.  Note that a value therefore extends beyond what is
 249    declared here.  */
 250
 251 extern const gdb_byte *value_contents (struct value *);
 252 extern gdb_byte *value_contents_writeable (struct value *);
 253
 254 /* The ALL variants of the above two macros do not adjust the returned
 255    pointer by the embedded_offset value.  */
 256
 257 extern gdb_byte *value_contents_all_raw (struct value *);
 258 extern const gdb_byte *value_contents_all (struct value *);
 259
 260 /* Like value_contents_all, but does not require that the returned
 261    bits be valid.  This should only be used in situations where you
 262    plan to check the validity manually.  */
 263 extern const gdb_byte *value_contents_for_printing (struct value *value);
 264
 265 extern int value_fetch_lazy (struct value *val);
 266 extern int value_contents_equal (struct value *val1, struct value *val2);
 267
 268 /* If nonzero, this is the value of a variable which does not actually
 269    exist in the program.  */
 270 extern int value_optimized_out (struct value *value);
 271 extern void set_value_optimized_out (struct value *value, int val);
 272
 273 /* Like value_optimized_out, but return false if any bit in the object
 274    is valid.  */
 275 extern int value_entirely_optimized_out (const struct value *value);
 276
 277 /* Set or return field indicating whether a variable is initialized or
 278    not, based on debugging information supplied by the compiler.
 279    1 = initialized; 0 = uninitialized.  */
 280 extern int value_initialized (struct value *);
 281 extern void set_value_initialized (struct value *, int);
 282
 283 /* Set COMPONENT's location as appropriate for a component of WHOLE
 284    --- regardless of what kind of lvalue WHOLE is.  */
 285 extern void set_value_component_location (struct value *component,
 286                                           const struct value *whole);
 287
 288 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
 289    single value might have multiple LVALs), this hacked interface is
 290    limited to just the first PIECE.  Expect further change.  */
 291 /* Type of value; either not an lval, or one of the various different
 292    possible kinds of lval.  */
 293 extern enum lval_type *deprecated_value_lval_hack (struct value *);
 294 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
 295
 296 /* If lval == lval_memory, return the address in the inferior.  If
 297    lval == lval_register, return the byte offset into the registers
 298    structure.  Otherwise, return 0.  The returned address
 299    includes the offset, if any.  */
 300 extern CORE_ADDR value_address (struct value *);
 301
 302 /* Like value_address, except the result does not include value's
 303    offset.  */
 304 extern CORE_ADDR value_raw_address (struct value *);
 305
 306 /* Set the address of a value.  */
 307 extern void set_value_address (struct value *, CORE_ADDR);
 308
 309 /* Pointer to internal variable.  */
 310 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
 311 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
 312
 313 /* Frame register value is relative to.  This will be described in the
 314    lval enum above as "lval_register".  */
 315 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
 316 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
 317
 318 /* Register number if the value is from a register.  */
 319 extern short *deprecated_value_regnum_hack (struct value *);
 320 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
 321
 322 /* Convert a REF to the object referenced.  */
 323
 324 extern struct value *coerce_ref (struct value *value);
 325
 326 /* If ARG is an array, convert it to a pointer.
 327    If ARG is a function, convert it to a function pointer.
 328
 329    References are dereferenced.  */
 330
 331 extern struct value *coerce_array (struct value *value);
 332
 333 /* Given a value, determine whether the bits starting at OFFSET and
 334    extending for LENGTH bits are valid.  This returns nonzero if all
 335    bits in the given range are valid, zero if any bit is invalid.  */
 336
 337 extern int value_bits_valid (const struct value *value,
 338                              int offset, int length);
 339
 340 \f
 341
 342 #include "symtab.h"
 343 #include "gdbtypes.h"
 344 #include "expression.h"
 345
 346 struct frame_info;
 347 struct fn_field;
 348
 349 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
 350                                     struct ui_file *, int);
 351
 352 extern LONGEST value_as_long (struct value *val);
 353 extern DOUBLEST value_as_double (struct value *val);
 354 extern CORE_ADDR value_as_address (struct value *val);
 355
 356 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
 357 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
 358                                int *invp);
 359 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
 360 LONGEST unpack_bits_as_long (struct type *field_type, const gdb_byte *valaddr,
 361                              int bitpos, int bitsize);
 362 extern LONGEST unpack_field_as_long (struct type *type,
 363                                      const gdb_byte *valaddr,
 364                                      int fieldno);
 365
 366 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
 367
 368 extern struct value *value_from_longest (struct type *type, LONGEST num);
 369 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
 370 extern struct value *value_from_double (struct type *type, DOUBLEST num);
 371 extern struct value *value_from_decfloat (struct type *type,
 372                                           const gdb_byte *decbytes);
 373
 374 extern struct value *value_at (struct type *type, CORE_ADDR addr);
 375 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
 376
 377 extern struct value *value_from_contents_and_address (struct type *,
 378                                                       const gdb_byte *,
 379                                                       CORE_ADDR);
 380
 381 extern struct value *default_value_from_register (struct type *type,
 382                                                   int regnum,
 383                                                   struct frame_info *frame);
 384
 385 extern struct value *value_from_register (struct type *type, int regnum,
 386                                           struct frame_info *frame);
 387
 388 extern CORE_ADDR address_from_register (struct type *type, int regnum,
 389                                         struct frame_info *frame);
 390
 391 extern struct value *value_of_variable (struct symbol *var, struct block *b);
 392
 393 extern struct value *address_of_variable (struct symbol *var, struct block *b);
 394
 395 extern struct value *value_of_register (int regnum, struct frame_info *frame);
 396
 397 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
 398
 399 extern int symbol_read_needs_frame (struct symbol *);
 400
 401 extern struct value *read_var_value (struct symbol *var,
 402                                      struct frame_info *frame);
 403
 404 extern struct value *allocate_value (struct type *type);
 405 extern struct value *allocate_value_lazy (struct type *type);
 406 extern void allocate_value_contents (struct value *value);
 407
 408 extern struct value *allocate_repeat_value (struct type *type, int count);
 409
 410 extern struct value *value_mark (void);
 411
 412 extern void value_free_to_mark (struct value *mark);
 413
 414 extern struct value *value_cstring (char *ptr, int len,
 415                                     struct type *char_type);
 416 extern struct value *value_string (char *ptr, int len,
 417                                    struct type *char_type);
 418 extern struct value *value_bitstring (char *ptr, int len,
 419                                       struct type *index_type);
 420
 421 extern struct value *value_array (int lowbound, int highbound,
 422                                   struct value **elemvec);
 423
 424 extern struct value *value_concat (struct value *arg1, struct value *arg2);
 425
 426 extern struct value *value_binop (struct value *arg1, struct value *arg2,
 427                                   enum exp_opcode op);
 428
 429 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
 430
 431 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
 432
 433 extern int value_must_coerce_to_target (struct value *arg1);
 434
 435 extern struct value *value_coerce_to_target (struct value *arg1);
 436
 437 extern struct value *value_coerce_array (struct value *arg1);
 438
 439 extern struct value *value_coerce_function (struct value *arg1);
 440
 441 extern struct value *value_ind (struct value *arg1);
 442
 443 extern struct value *value_addr (struct value *arg1);
 444
 445 extern struct value *value_ref (struct value *arg1);
 446
 447 extern struct value *value_assign (struct value *toval,
 448                                    struct value *fromval);
 449
 450 extern struct value *value_pos (struct value *arg1);
 451
 452 extern struct value *value_neg (struct value *arg1);
 453
 454 extern struct value *value_complement (struct value *arg1);
 455
 456 extern struct value *value_struct_elt (struct value **argp,
 457                                        struct value **args,
 458                                        const char *name, int *static_memfuncp,
 459                                        const char *err);
 460
 461 extern struct value *value_aggregate_elt (struct type *curtype,
 462                                           char *name,
 463                                           struct type *expect_type,
 464                                           int want_address,
 465                                           enum noside noside);
 466
 467 extern struct value *value_static_field (struct type *type, int fieldno);
 468
 469 extern struct fn_field *value_find_oload_method_list (struct value **,
 470                                                       const char *,
 471                                                       int, int *,
 472                                                       struct type **, int *);
 473
 474 enum oload_search_type { NON_METHOD, METHOD, BOTH };
 475
 476 extern int find_overload_match (struct type **arg_types, int nargs,
 477                                 const char *name,
 478                                 enum oload_search_type method, int lax,
 479                                 struct value **objp, struct symbol *fsym,
 480                                 struct value **valp, struct symbol **symp,
 481                                 int *staticp, const int no_adl);
 482
 483 extern struct value *value_field (struct value *arg1, int fieldno);
 484
 485 extern struct value *value_primitive_field (struct value *arg1, int offset,
 486                                             int fieldno,
 487                                             struct type *arg_type);
 488
 489
 490 extern struct type *value_rtti_target_type (struct value *, int *, int *,
 491                                             int *);
 492
 493 extern struct value *value_full_object (struct value *, struct type *, int,
 494                                         int, int);
 495
 496 extern struct value *value_cast_pointers (struct type *, struct value *);
 497
 498 extern struct value *value_cast (struct type *type, struct value *arg2);
 499
 500 extern struct value *value_reinterpret_cast (struct type *type,
 501                                              struct value *arg);
 502
 503 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
 504
 505 extern struct value *value_zero (struct type *type, enum lval_type lv);
 506
 507 extern struct value *value_one (struct type *type, enum lval_type lv);
 508
 509 extern struct value *value_repeat (struct value *arg1, int count);
 510
 511 extern struct value *value_subscript (struct value *array, LONGEST index);
 512
 513 extern struct value *value_bitstring_subscript (struct type *type,
 514                                                 struct value *bitstring,
 515                                                 LONGEST index);
 516
 517 extern struct value *register_value_being_returned (struct type *valtype,
 518                                                     struct regcache *retbuf);
 519
 520 extern int value_in (struct value *element, struct value *set);
 521
 522 extern int value_bit_index (struct type *type, const gdb_byte *addr,
 523                             int index);
 524
 525 extern int using_struct_return (struct gdbarch *gdbarch,
 526                                 struct type *func_type,
 527                                 struct type *value_type);
 528
 529 extern struct value *evaluate_expression (struct expression *exp);
 530
 531 extern struct value *evaluate_type (struct expression *exp);
 532
 533 extern struct value *evaluate_subexp (struct type *expect_type,
 534                                       struct expression *exp,
 535                                       int *pos, enum noside noside);
 536
 537 extern struct value *evaluate_subexpression_type (struct expression *exp,
 538                                                   int subexp);
 539
 540 extern char *extract_field_op (struct expression *exp, int *subexp);
 541
 542 extern struct value *evaluate_subexp_with_coercion (struct expression *,
 543                                                     int *, enum noside);
 544
 545 extern struct value *parse_and_eval (char *exp);
 546
 547 extern struct value *parse_to_comma_and_eval (char **expp);
 548
 549 extern struct type *parse_and_eval_type (char *p, int length);
 550
 551 extern CORE_ADDR parse_and_eval_address (char *exp);
 552
 553 extern CORE_ADDR parse_and_eval_address_1 (char **expptr);
 554
 555 extern LONGEST parse_and_eval_long (char *exp);
 556
 557 extern void unop_promote (const struct language_defn *language,
 558                           struct gdbarch *gdbarch,
 559                           struct value **arg1);
 560
 561 extern void binop_promote (const struct language_defn *language,
 562                            struct gdbarch *gdbarch,
 563                            struct value **arg1, struct value **arg2);
 564
 565 extern struct value *access_value_history (int num);
 566
 567 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
 568                                            struct internalvar *var);
 569
 570 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
 571
 572 extern void set_internalvar (struct internalvar *var, struct value *val);
 573
 574 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
 575
 576 extern void set_internalvar_string (struct internalvar *var,
 577                                     const char *string);
 578
 579 extern void clear_internalvar (struct internalvar *var);
 580
 581 extern void set_internalvar_component (struct internalvar *var,
 582                                        int offset,
 583                                        int bitpos, int bitsize,
 584                                        struct value *newvalue);
 585
 586 extern struct internalvar *lookup_only_internalvar (const char *name);
 587
 588 extern struct internalvar *create_internalvar (const char *name);
 589
 590 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
 591                                                   struct internalvar *);
 592 extern struct internalvar *
 593   create_internalvar_type_lazy (char *name, internalvar_make_value fun);
 594
 595 extern struct internalvar *lookup_internalvar (const char *name);
 596
 597 extern int value_equal (struct value *arg1, struct value *arg2);
 598
 599 extern int value_equal_contents (struct value *arg1, struct value *arg2);
 600
 601 extern int value_less (struct value *arg1, struct value *arg2);
 602
 603 extern int value_logical_not (struct value *arg1);
 604
 605 /* C++ */
 606
 607 extern struct value *value_of_this (int complain);
 608
 609 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
 610                                     enum exp_opcode op,
 611                                     enum exp_opcode otherop,
 612                                     enum noside noside);
 613
 614 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
 615                                    enum noside noside);
 616
 617 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
 618                                      int j, struct type *type, int offset);
 619
 620 extern int binop_types_user_defined_p (enum exp_opcode op,
 621                                        struct type *type1,
 622                                        struct type *type2);
 623
 624 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
 625                                  struct value *arg2);
 626
 627 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
 628
 629 extern int destructor_name_p (const char *name, const struct type *type);
 630
 631 extern void value_incref (struct value *val);
 632
 633 extern void value_free (struct value *val);
 634
 635 extern void free_all_values (void);
 636
 637 extern void release_value (struct value *val);
 638
 639 extern int record_latest_value (struct value *val);
 640
 641 extern void modify_field (struct type *type, gdb_byte *addr,
 642                           LONGEST fieldval, int bitpos, int bitsize);
 643
 644 extern void type_print (struct type *type, char *varstring,
 645                         struct ui_file *stream, int show);
 646
 647 extern char *type_to_string (struct type *type);
 648
 649 extern gdb_byte *baseclass_addr (struct type *type, int index,
 650                                  gdb_byte *valaddr,
 651                                  struct value **valuep, int *errp);
 652
 653 extern void print_longest (struct ui_file *stream, int format,
 654                            int use_local, LONGEST val);
 655
 656 extern void print_floating (const gdb_byte *valaddr, struct type *type,
 657                             struct ui_file *stream);
 658
 659 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
 660                                     struct ui_file *stream);
 661
 662 extern int value_print (struct value *val, struct ui_file *stream,
 663                         const struct value_print_options *options);
 664
 665 extern void value_print_array_elements (struct value *val,
 666                                         struct ui_file *stream, int format,
 667                                         enum val_prettyprint pretty);
 668
 669 extern struct value *value_release_to_mark (struct value *mark);
 670
 671 extern int val_print (struct type *type, const gdb_byte *valaddr,
 672                       int embedded_offset, CORE_ADDR address,
 673                       struct ui_file *stream, int recurse,
 674                       const struct value *val,
 675                       const struct value_print_options *options,
 676                       const struct language_defn *language);
 677
 678 extern int common_val_print (struct value *val,
 679                              struct ui_file *stream, int recurse,
 680                              const struct value_print_options *options,
 681                              const struct language_defn *language);
 682
 683 extern int val_print_string (struct type *elttype, CORE_ADDR addr, int len,
 684                              struct ui_file *stream,
 685                              const struct value_print_options *options);
 686
 687 extern void print_variable_and_value (const char *name,
 688                                       struct symbol *var,
 689                                       struct frame_info *frame,
 690                                       struct ui_file *stream,
 691                                       int indent);
 692
 693 extern int check_field (struct type *, const char *);
 694
 695 extern void typedef_print (struct type *type, struct symbol *news,
 696                            struct ui_file *stream);
 697
 698 extern char *internalvar_name (struct internalvar *var);
 699
 700 extern void preserve_values (struct objfile *);
 701
 702 /* From values.c */
 703
 704 extern struct value *value_copy (struct value *);
 705
 706 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
 707
 708 /* From valops.c */
 709
 710 extern struct value *varying_to_slice (struct value *);
 711
 712 extern struct value *value_slice (struct value *, int, int);
 713
 714 extern struct value *value_literal_complex (struct value *, struct value *,
 715                                             struct type *);
 716
 717 extern struct value *find_function_in_inferior (const char *,
 718                                                 struct objfile **);
 719
 720 extern struct value *value_allocate_space_in_inferior (int);
 721
 722 extern struct value *value_of_local (const char *name, int complain);
 723
 724 extern struct value *value_subscripted_rvalue (struct value *array,
 725                                                LONGEST index, int lowerbound);
 726
 727 /* User function handler.  */
 728
 729 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
 730                                                const struct language_defn *language,
 731                                                void *cookie,
 732                                                int argc,
 733                                                struct value **argv);
 734
 735 void add_internal_function (const char *name, const char *doc,
 736                             internal_function_fn handler,
 737                             void *cookie);
 738
 739 struct value *call_internal_function (struct gdbarch *gdbarch,
 740                                       const struct language_defn *language,
 741                                       struct value *function,
 742                                       int argc, struct value **argv);
 743
 744 char *value_internal_function_name (struct value *);
 745
 746 #endif /* !defined (VALUE_H) */