gdb/defs.h

   1 /* *INDENT-OFF* */ /* ATTR_FORMAT confuses indent, avoid running it for now */
   2 /* Basic, host-specific, and target-specific definitions for GDB.
   3    Copyright (C) 1986, 89, 91, 92, 93, 94, 95, 96, 98, 1999
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef DEFS_H
  24 #define DEFS_H
  25
  26 #include "config.h"             /* Generated by configure */
  27 #include <stdio.h>
  28 #include <errno.h>              /* System call error return status */
  29 #include <limits.h>
  30
  31 #ifdef HAVE_STDDEF_H
  32 #  include <stddef.h>
  33 #else
  34 #  include <sys/types.h>   /* for size_t */
  35 #endif
  36
  37 #ifdef HAVE_UNISTD_H
  38 #include <unistd.h>
  39 #endif
  40
  41 /* Just in case they're not defined in stdio.h. */
  42
  43 #ifndef SEEK_SET
  44 #define SEEK_SET 0
  45 #endif
  46 #ifndef SEEK_CUR
  47 #define SEEK_CUR 1
  48 #endif
  49
  50 /* First include ansidecl.h so we can use the various macro definitions
  51    here and in all subsequent file inclusions.  */
  52
  53 #include "ansidecl.h"
  54
  55 #include <stdarg.h> /* for va_list */
  56
  57 #include "libiberty.h"
  58
  59 /* libiberty.h can't declare this one, but evidently we can.  */
  60 extern char *strsignal PARAMS ((int));
  61
  62 #include "progress.h"
  63
  64 #ifdef USE_MMALLOC
  65 #include "mmalloc.h"
  66 #endif
  67
  68 /* For BFD64 and bfd_vma.  */
  69 #include "bfd.h"
  70
  71 /* An address in the program being debugged.  Host byte order.  Rather
  72    than duplicate all the logic in BFD which figures out what type
  73    this is (long, long long, etc.) and whether it needs to be 64
  74    bits (the host/target interactions are subtle), we just use
  75    bfd_vma.  */
  76
  77 typedef bfd_vma CORE_ADDR;
  78
  79 /* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */
  80
  81 #ifndef LONGEST
  82
  83 #ifdef BFD64
  84
  85 #define LONGEST BFD_HOST_64_BIT
  86 #define ULONGEST BFD_HOST_U_64_BIT
  87
  88 #else /* No BFD64 */
  89
  90 #  ifdef CC_HAS_LONG_LONG
  91 #    define LONGEST long long
  92 #    define ULONGEST unsigned long long
  93 #  else
  94 /* BFD_HOST_64_BIT is defined for some hosts that don't have long long
  95    (e.g. i386-windows) so try it.  */
  96 #    ifdef BFD_HOST_64_BIT
  97 #      define LONGEST BFD_HOST_64_BIT
  98 #      define ULONGEST BFD_HOST_U_64_BIT
  99 #    else
 100 #      define LONGEST long
 101 #      define ULONGEST unsigned long
 102 #    endif
 103 #  endif
 104
 105 #endif /* No BFD64 */
 106
 107 #endif /* ! LONGEST */
 108
 109 extern int core_addr_lessthan PARAMS ((CORE_ADDR lhs, CORE_ADDR rhs));
 110 extern int core_addr_greaterthan PARAMS ((CORE_ADDR lhs, CORE_ADDR rhs));
 111
 112
 113 #ifndef min
 114 #define min(a, b) ((a) < (b) ? (a) : (b))
 115 #endif
 116 #ifndef max
 117 #define max(a, b) ((a) > (b) ? (a) : (b))
 118 #endif
 119
 120 /* Gdb does *lots* of string compares.  Use macros to speed them up by
 121    avoiding function calls if the first characters are not the same. */
 122
 123 #define STRCMP(a,b) (*(a) == *(b) ? strcmp ((a), (b)) : (int)*(a) - (int)*(b))
 124 #define STREQ(a,b) (*(a) == *(b) ? !strcmp ((a), (b)) : 0)
 125 #define STREQN(a,b,c) (*(a) == *(b) ? !strncmp ((a), (b), (c)) : 0)
 126
 127 /* The character GNU C++ uses to build identifiers that must be unique from
 128    the program's identifiers (such as $this and $$vptr).  */
 129 #define CPLUS_MARKER '$'        /* May be overridden to '.' for SysV */
 130
 131 /* Check if a character is one of the commonly used C++ marker characters.  */
 132 extern int is_cplus_marker PARAMS ((int));
 133
 134 /* use tui interface if non-zero */
 135 extern int tui_version;
 136
 137 #if defined(TUI)
 138 /* all invocations of TUIDO should have two sets of parens */
 139 #define TUIDO(x)        tuiDo x
 140 #else
 141 #define TUIDO(x)
 142 #endif
 143
 144 /* enable xdb commands if set */
 145 extern int xdb_commands;
 146
 147 /* enable dbx commands if set */
 148 extern int dbx_commands;
 149
 150 extern int quit_flag;
 151 extern int immediate_quit;
 152 extern int sevenbit_strings;
 153
 154 extern void quit PARAMS ((void));
 155
 156 #ifdef QUIT
 157 /* do twice to force compiler warning */
 158 #define QUIT_FIXME "FIXME"
 159 #define QUIT_FIXME "ignoring redefinition of QUIT"
 160 #else
 161 #define QUIT { \
 162   if (quit_flag) quit (); \
 163   if (interactive_hook) interactive_hook (); \
 164   PROGRESS (1); \
 165 }
 166 #endif
 167
 168 /* Command classes are top-level categories into which commands are broken
 169    down for "help" purposes.
 170    Notes on classes: class_alias is for alias commands which are not
 171    abbreviations of the original command.  class-pseudo is for commands
 172    which are not really commands nor help topics ("stop").  */
 173
 174 enum command_class
 175 {
 176   /* Special args to help_list */
 177   all_classes = -2, all_commands = -1,
 178   /* Classes of commands */
 179   no_class = -1, class_run = 0, class_vars, class_stack,
 180   class_files, class_support, class_info, class_breakpoint, class_trace,
 181   class_alias, class_obscure, class_user, class_maintenance,
 182   class_pseudo, class_tui, class_xdb
 183 };
 184
 185 /* Languages represented in the symbol table and elsewhere.
 186    This should probably be in language.h, but since enum's can't
 187    be forward declared to satisfy opaque references before their
 188    actual definition, needs to be here. */
 189
 190 enum language
 191 {
 192    language_unknown,            /* Language not known */
 193    language_auto,               /* Placeholder for automatic setting */
 194    language_c,                  /* C */
 195    language_cplus,              /* C++ */
 196    language_java,               /* Java */
 197    language_chill,              /* Chill */
 198    language_fortran,            /* Fortran */
 199    language_m2,                 /* Modula-2 */
 200    language_asm,                /* Assembly language */
 201    language_scm                 /* Scheme / Guile */
 202 };
 203
 204 enum precision_type
 205 {
 206   single_precision,
 207   double_precision,
 208   unspecified_precision
 209 };
 210
 211 /* the cleanup list records things that have to be undone
 212    if an error happens (descriptors to be closed, memory to be freed, etc.)
 213    Each link in the chain records a function to call and an
 214    argument to give it.
 215
 216    Use make_cleanup to add an element to the cleanup chain.
 217    Use do_cleanups to do all cleanup actions back to a given
 218    point in the chain.  Use discard_cleanups to remove cleanups
 219    from the chain back to a given point, not doing them.  */
 220
 221 struct cleanup
 222 {
 223   struct cleanup *next;
 224   void (*function) PARAMS ((PTR));
 225   PTR arg;
 226 };
 227
 228
 229 /* The ability to declare that a function never returns is useful, but
 230    not really required to compile GDB successfully, so the NORETURN and
 231    ATTR_NORETURN macros normally expand into nothing.  */
 232
 233 /* If compiling with older versions of GCC, a function may be declared
 234    "volatile" to indicate that it does not return.  */
 235
 236 #ifndef NORETURN
 237 # if defined(__GNUC__) \
 238      && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7))
 239 #  define NORETURN volatile
 240 # else
 241 #  define NORETURN /* nothing */
 242 # endif
 243 #endif
 244
 245 /* GCC 2.5 and later versions define a function attribute "noreturn",
 246    which is the preferred way to declare that a function never returns.
 247    However GCC 2.7 appears to be the first version in which this fully
 248    works everywhere we use it. */
 249
 250 #ifndef ATTR_NORETURN
 251 # if defined(__GNUC__) && __GNUC__ >= 2 && __GNUC_MINOR__ >= 7
 252 #  define ATTR_NORETURN __attribute__ ((noreturn))
 253 # else
 254 #  define ATTR_NORETURN /* nothing */
 255 # endif
 256 #endif
 257
 258 #ifndef ATTR_FORMAT
 259 # if defined(__GNUC__) && __GNUC__ >= 2 && __GNUC_MINOR__ >= 4
 260 #  define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
 261 # else
 262 #  define ATTR_FORMAT(type, x, y) /* nothing */
 263 # endif
 264 #endif
 265
 266 /* Needed for various prototypes */
 267
 268 struct symtab;
 269 struct breakpoint;
 270
 271 /* From blockframe.c */
 272
 273 extern int inside_entry_func PARAMS ((CORE_ADDR));
 274
 275 extern int inside_entry_file PARAMS ((CORE_ADDR addr));
 276
 277 extern int inside_main_func PARAMS ((CORE_ADDR pc));
 278
 279 /* From ch-lang.c, for the moment. (FIXME) */
 280
 281 extern char *chill_demangle PARAMS ((const char *));
 282
 283 /* From utils.c */
 284
 285 extern void initialize_utils PARAMS ((void));
 286
 287 extern void notice_quit PARAMS ((void));
 288
 289 extern int strcmp_iw PARAMS ((const char *, const char *));
 290
 291 extern int subset_compare PARAMS ((char *, char *));
 292
 293 extern char *safe_strerror PARAMS ((int));
 294
 295 extern char *safe_strsignal PARAMS ((int));
 296
 297 extern void init_malloc PARAMS ((void *));
 298
 299 extern void request_quit PARAMS ((int));
 300
 301 extern void do_cleanups PARAMS ((struct cleanup *));
 302 extern void do_final_cleanups PARAMS ((struct cleanup *));
 303 extern void do_my_cleanups PARAMS ((struct cleanup **, struct cleanup *));
 304 extern void do_run_cleanups PARAMS ((struct cleanup *));
 305 extern void do_exec_cleanups PARAMS ((struct cleanup *));
 306
 307 extern void discard_cleanups PARAMS ((struct cleanup *));
 308 extern void discard_final_cleanups PARAMS ((struct cleanup *));
 309 extern void discard_my_cleanups PARAMS ((struct cleanup **, struct cleanup *));
 310
 311 typedef void (*make_cleanup_func) PARAMS ((void *));
 312
 313 extern struct cleanup *make_cleanup PARAMS ((make_cleanup_func, void *));
 314
 315 extern struct cleanup *make_cleanup_freeargv PARAMS ((char **));
 316
 317 extern struct cleanup *make_final_cleanup PARAMS ((make_cleanup_func, void *));
 318
 319 extern struct cleanup *make_my_cleanup PARAMS ((struct cleanup **,
 320                                                 make_cleanup_func, void *));
 321
 322 extern struct cleanup *make_run_cleanup PARAMS ((make_cleanup_func, void *));
 323
 324 extern struct cleanup *make_exec_cleanup PARAMS ((make_cleanup_func, void *));
 325
 326 extern struct cleanup *save_cleanups PARAMS ((void));
 327 extern struct cleanup *save_final_cleanups PARAMS ((void));
 328 extern struct cleanup *save_my_cleanups PARAMS ((struct cleanup **));
 329
 330 extern void restore_cleanups PARAMS ((struct cleanup *));
 331 extern void restore_final_cleanups PARAMS ((struct cleanup *));
 332 extern void restore_my_cleanups PARAMS ((struct cleanup **, struct cleanup *));
 333
 334 extern void free_current_contents PARAMS ((char **));
 335
 336 extern void null_cleanup PARAMS ((PTR));
 337
 338 extern int myread PARAMS ((int, char *, int));
 339
 340 extern int query PARAMS((char *, ...))
 341      ATTR_FORMAT(printf, 1, 2);
 342
 343 #if !defined (USE_MMALLOC)
 344 extern PTR mmalloc PARAMS ((PTR, size_t));
 345 extern PTR mrealloc PARAMS ((PTR, PTR, size_t));
 346 extern void mfree PARAMS ((PTR, PTR));
 347 #endif
 348
 349 extern void init_page_info PARAMS ((void));
 350
 351 /* From demangle.c */
 352
 353 extern void set_demangling_style PARAMS ((char *));
 354
 355 /* From tm.h */
 356
 357 struct type;
 358 typedef int (use_struct_convention_fn) PARAMS ((int gcc_p, struct type *value_type));
 359 extern use_struct_convention_fn generic_use_struct_convention;
 360
 361 typedef unsigned char *(breakpoint_from_pc_fn) PARAMS ((CORE_ADDR *pcptr, int *lenptr));
 362
 363
 364 \f
 365 /* Annotation stuff.  */
 366
 367 extern int annotation_level; /* in stack.c */
 368 \f
 369 extern void begin_line PARAMS ((void));
 370
 371 extern void wrap_here PARAMS ((char *));
 372
 373 extern void reinitialize_more_filter PARAMS ((void));
 374
 375 struct gdb_file;
 376 typedef struct gdb_file GDB_FILE; /* deprecated */
 377
 378 /* Normal results */
 379 extern GDB_FILE *gdb_stdout;
 380 /* Serious error notifications */
 381 extern GDB_FILE *gdb_stderr;
 382 /* Log/debug/trace messages that should bypass normal stdout/stderr
 383    filtering.  For momement, always call this stream using
 384    *_unfiltered. In the very near future that restriction shall be
 385    removed - either call shall be unfiltered. (cagney 1999-06-13). */
 386 extern GDB_FILE *gdb_stdlog;
 387 /* Target output that should bypass normal stdout/stderr filtering.
 388    For momement, always call this stream using *_unfiltered. In the
 389    very near future that restriction shall be removed - either call
 390    shall be unfiltered. (cagney 1999-07-02). */
 391 extern GDB_FILE *gdb_stdtarg;
 392
 393 #if defined(TUI)
 394 #include "tui.h"
 395 #include "tuiCommand.h"
 396 #include "tuiData.h"
 397 #include "tuiIO.h"
 398 #include "tuiLayout.h"
 399 #include "tuiWin.h"
 400 #endif
 401
 402 /* Create a new gdb_file with the specified methods. */
 403
 404 typedef void (gdb_file_flush_ftype) PARAMS ((struct gdb_file *stream));
 405 extern void set_gdb_file_flush PARAMS ((struct gdb_file *stream, gdb_file_flush_ftype *flush));
 406
 407 typedef void (gdb_file_fputs_ftype) PARAMS ((const char *, struct gdb_file *stream));
 408 extern void set_gdb_file_fputs PARAMS ((struct gdb_file *stream, gdb_file_fputs_ftype *fputs));
 409
 410 typedef int (gdb_file_isatty_ftype) PARAMS ((struct gdb_file *stream));
 411 extern void set_gdb_file_isatty PARAMS ((struct gdb_file *stream, gdb_file_isatty_ftype *isatty));
 412
 413 typedef void (gdb_file_rewind_ftype) PARAMS ((struct gdb_file *stream));
 414 extern void set_gdb_file_rewind PARAMS ((struct gdb_file *stream, gdb_file_rewind_ftype *rewind));
 415
 416 typedef void (gdb_file_put_ftype) PARAMS ((struct gdb_file *stream, struct gdb_file *dest));
 417 extern void set_gdb_file_put PARAMS ((struct gdb_file *stream, gdb_file_put_ftype *put));
 418
 419 typedef void (gdb_file_delete_ftype) PARAMS ((struct gdb_file *stream));
 420 extern void set_gdb_file_data PARAMS ((struct gdb_file *stream, void *data, gdb_file_delete_ftype *delete));
 421
 422 extern struct gdb_file *gdb_file_new PARAMS ((void));
 423
 424 extern void gdb_file_delete PARAMS ((struct gdb_file *stream));
 425
 426 extern void gdb_file_rewind PARAMS ((struct gdb_file *stream));
 427
 428 /* NOTE: copies left to right */
 429 extern void gdb_file_put PARAMS ((struct gdb_file *src, struct gdb_file *dest));
 430
 431 extern void *gdb_file_data PARAMS ((struct gdb_file *file));
 432
 433 /* Open the specified FILE as a gdb_file. */
 434 extern struct gdb_file *stdio_fileopen PARAMS ((FILE *));
 435 /* #if defined (TUI) */
 436 extern struct gdb_file *tui_fileopen PARAMS ((FILE *));
 437 /* #endif */
 438
 439 /* deprecated - use gdb_file_delete */
 440 extern void gdb_fclose PARAMS ((GDB_FILE **));
 441
 442 extern void gdb_flush PARAMS ((GDB_FILE *));
 443
 444 extern GDB_FILE *gdb_fopen PARAMS ((char * name, char * mode));
 445
 446 extern void fputs_filtered PARAMS ((const char *, GDB_FILE *));
 447
 448 extern void fputs_unfiltered PARAMS ((const char *, GDB_FILE *));
 449
 450 extern int fputc_filtered PARAMS ((int c, GDB_FILE *));
 451
 452 extern int fputc_unfiltered PARAMS ((int c, GDB_FILE *));
 453
 454 extern int putchar_unfiltered PARAMS ((int c));
 455
 456 extern void puts_filtered PARAMS ((const char *));
 457
 458 extern void puts_unfiltered PARAMS ((const char *));
 459
 460 extern void puts_debug PARAMS ((char *prefix, char *string, char *suffix));
 461
 462 extern void vprintf_filtered PARAMS ((const char *, va_list))
 463      ATTR_FORMAT(printf, 1, 0);
 464
 465 extern void vfprintf_filtered PARAMS ((GDB_FILE *, const char *, va_list))
 466      ATTR_FORMAT(printf, 2, 0);
 467
 468 extern void fprintf_filtered PARAMS ((GDB_FILE *, const char *, ...))
 469      ATTR_FORMAT(printf, 2, 3);
 470
 471 extern void fprintfi_filtered PARAMS ((int, GDB_FILE *, const char *, ...))
 472      ATTR_FORMAT(printf, 3, 4);
 473
 474 extern void printf_filtered PARAMS ((const char *, ...))
 475      ATTR_FORMAT(printf, 1, 2);
 476
 477 extern void printfi_filtered PARAMS ((int, const char *, ...))
 478      ATTR_FORMAT(printf, 2, 3);
 479
 480 extern void vprintf_unfiltered PARAMS ((const char *, va_list))
 481      ATTR_FORMAT(printf, 1, 0);
 482
 483 extern void vfprintf_unfiltered PARAMS ((GDB_FILE *, const char *, va_list))
 484      ATTR_FORMAT(printf, 2, 0);
 485
 486 extern void fprintf_unfiltered PARAMS ((GDB_FILE *, const char *, ...))
 487      ATTR_FORMAT(printf, 2, 3);
 488
 489 extern void printf_unfiltered PARAMS ((const char *, ...))
 490      ATTR_FORMAT(printf, 1, 2);
 491
 492 extern int gdb_file_isatty PARAMS ((GDB_FILE *));
 493
 494 /* #if defined (TUI) */
 495 extern GDB_FILE *gdb_file_init_astring PARAMS ((int));
 496 /* #endif */
 497
 498 extern void gdb_file_deallocate PARAMS ((GDB_FILE **));
 499
 500 /* #if defined (TUI) */
 501 extern char *gdb_file_get_strbuf PARAMS ((GDB_FILE *));
 502 /* #endif */
 503
 504 /* #if defined (TUI) */
 505 extern void gdb_file_adjust_strbuf PARAMS ((int, GDB_FILE *));
 506 /* #endif */
 507
 508 extern void print_spaces PARAMS ((int, GDB_FILE *));
 509
 510 extern void print_spaces_filtered PARAMS ((int, GDB_FILE *));
 511
 512 extern char *n_spaces PARAMS ((int));
 513
 514 extern void fputstr_filtered PARAMS ((const char *str, int quotr, GDB_FILE *stream));
 515
 516 extern void fputstr_unfiltered PARAMS ((const char *str, int quotr, GDB_FILE *stream));
 517
 518 extern void fputstrn_unfiltered PARAMS ((const char *str, int n, int quotr, GDB_FILE *stream));
 519
 520 extern void gdb_print_address PARAMS ((void *, GDB_FILE *));
 521
 522 /* Convert a CORE_ADDR into a HEX string.  paddr() is like %08lx.
 523    paddr_nz() is like %lx.  paddr_u() is like %lu. paddr_width() is
 524    for ``%*''. */
 525 extern int strlen_paddr ();
 526 extern char* paddr (CORE_ADDR addr);
 527 extern char* paddr_nz (CORE_ADDR addr);
 528 extern char* paddr_u (CORE_ADDR addr);
 529 extern char* paddr_d (LONGEST addr);
 530
 531 typedef bfd_vma t_reg;
 532 extern char* preg (t_reg reg);
 533 extern char* preg_nz (t_reg reg);
 534
 535 extern void fprintf_symbol_filtered PARAMS ((GDB_FILE *, char *,
 536                                              enum language, int));
 537
 538 extern NORETURN void perror_with_name PARAMS ((char *)) ATTR_NORETURN;
 539
 540 extern void print_sys_errmsg PARAMS ((char *, int));
 541
 542 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 543    "const char *" in unistd.h, so we can't declare the argument
 544    as "char *".  */
 545
 546 extern char *re_comp PARAMS ((const char *));
 547
 548 /* From symfile.c */
 549
 550 extern void symbol_file_command PARAMS ((char *, int));
 551
 552 /* From top.c */
 553
 554 extern char *skip_quoted PARAMS ((char *));
 555
 556 extern char *gdb_readline PARAMS ((char *));
 557
 558 extern char *command_line_input PARAMS ((char *, int, char *));
 559
 560 extern void print_prompt PARAMS ((void));
 561
 562 extern int input_from_terminal_p PARAMS ((void));
 563
 564 extern int info_verbose;
 565
 566 /* From printcmd.c */
 567
 568 extern void set_next_address PARAMS ((CORE_ADDR));
 569
 570 extern void print_address_symbolic PARAMS ((CORE_ADDR, GDB_FILE *, int,
 571                                             char *));
 572
 573 extern void print_address_numeric PARAMS ((CORE_ADDR, int, GDB_FILE *));
 574
 575 extern void print_address PARAMS ((CORE_ADDR, GDB_FILE *));
 576
 577 /* From source.c */
 578
 579 extern int openp PARAMS ((char *, int, char *, int, int, char **));
 580
 581 extern int source_full_path_of PARAMS ((char *, char **));
 582
 583 extern void mod_path PARAMS ((char *, char **));
 584
 585 extern void directory_command PARAMS ((char *, int));
 586
 587 extern void init_source_path PARAMS ((void));
 588
 589 extern char *symtab_to_filename PARAMS ((struct symtab *));
 590
 591 /* From exec.c */
 592
 593 extern void exec_set_section_offsets (bfd_signed_vma text_off,
 594                                       bfd_signed_vma data_off,
 595                                       bfd_signed_vma bss_off);
 596
 597 /* From findvar.c */
 598
 599 extern int read_relative_register_raw_bytes PARAMS ((int, char *));
 600
 601 /* Possible lvalue types.  Like enum language, this should be in
 602    value.h, but needs to be here for the same reason. */
 603
 604 enum lval_type
 605   {
 606     /* Not an lval. */
 607     not_lval,
 608     /* In memory.  Could be a saved register.  */
 609     lval_memory,
 610     /* In a register.  */
 611     lval_register,
 612     /* In a gdb internal variable.  */
 613     lval_internalvar,
 614     /* Part of a gdb internal variable (structure field).  */
 615     lval_internalvar_component,
 616     /* In a register series in a frame not the current one, which may have been
 617        partially saved or saved in different places (otherwise would be
 618        lval_register or lval_memory).  */
 619     lval_reg_frame_relative
 620   };
 621
 622 struct frame_info;
 623
 624 void default_get_saved_register PARAMS ((char *raw_buffer, int *optimized,
 625                                          CORE_ADDR *addrp,
 626                                          struct frame_info *frame, int regnum,
 627                                          enum lval_type *lval));
 628
 629 /* From readline (but not in any readline .h files).  */
 630
 631 extern char *tilde_expand PARAMS ((char *));
 632
 633 /* Control types for commands */
 634
 635 enum misc_command_type
 636 {
 637   ok_command,
 638   end_command,
 639   else_command,
 640   nop_command
 641 };
 642
 643 enum command_control_type
 644 {
 645   simple_control,
 646   break_control,
 647   continue_control,
 648   while_control,
 649   if_control,
 650   invalid_control
 651 };
 652
 653 /* Structure for saved commands lines
 654    (for breakpoints, defined commands, etc).  */
 655
 656 struct command_line
 657 {
 658   struct command_line *next;
 659   char *line;
 660   enum command_control_type control_type;
 661   int body_count;
 662   struct command_line **body_list;
 663 };
 664
 665 extern struct command_line *read_command_lines PARAMS ((char *, int));
 666
 667 extern void free_command_lines PARAMS ((struct command_line **));
 668
 669 /* To continue the execution commands when running gdb asynchronously.
 670    A continuation structure contains a pointer to a function to be called
 671    to finish the command, once the target has stopped. Such mechanism is
 672    used bt the finish and until commands, and in the remote protocol
 673    when opening an extended-remote connection. */
 674
 675 struct continuation_arg
 676 {
 677   struct continuation_arg *next;
 678   PTR data;
 679 };
 680
 681 struct continuation
 682 {
 683   void (*continuation_hook) PARAMS ((struct continuation_arg *));
 684   struct continuation_arg *arg_list;
 685   struct continuation *next;
 686 }
 687 continuation;
 688
 689 /* In infrun.c. */
 690 extern struct continuation *cmd_continuation;
 691
 692 /* From utils.c */
 693 void add_continuation PARAMS ((void (*) PARAMS ((struct continuation_arg *)),
 694                                struct continuation_arg *));
 695 void do_all_continuations PARAMS ((void));
 696
 697 /* String containing the current directory (what getwd would return).  */
 698
 699 extern char *current_directory;
 700
 701 /* Default radixes for input and output.  Only some values supported.  */
 702 extern unsigned input_radix;
 703 extern unsigned output_radix;
 704
 705 /* Possibilities for prettyprint parameters to routines which print
 706    things.  Like enum language, this should be in value.h, but needs
 707    to be here for the same reason.  FIXME:  If we can eliminate this
 708    as an arg to LA_VAL_PRINT, then we can probably move it back to
 709    value.h. */
 710
 711 enum val_prettyprint
 712 {
 713   Val_no_prettyprint = 0,
 714   Val_prettyprint,
 715   /* Use the default setting which the user has specified.  */
 716   Val_pretty_default
 717 };
 718
 719 \f
 720 /* Host machine definition.  This will be a symlink to one of the
 721    xm-*.h files, built by the `configure' script.  */
 722
 723 #include "xm.h"
 724
 725 /* Native machine support.  This will be a symlink to one of the
 726    nm-*.h files, built by the `configure' script.  */
 727
 728 #include "nm.h"
 729
 730 /* Target machine definition.  This will be a symlink to one of the
 731    tm-*.h files, built by the `configure' script.  */
 732
 733 #include "tm.h"
 734
 735 /* If the xm.h file did not define the mode string used to open the
 736    files, assume that binary files are opened the same way as text
 737    files */
 738 #ifndef FOPEN_RB
 739 #include "fopen-same.h"
 740 #endif
 741
 742 /* Microsoft C can't deal with const pointers */
 743
 744 #ifdef _MSC_VER
 745 #define CONST_PTR
 746 #else
 747 #define CONST_PTR const
 748 #endif
 749
 750 /*
 751  * Allow things in gdb to be declared "volatile".  If compiling ANSI, it
 752  * just works.  If compiling with gcc but non-ansi, redefine to __volatile__.
 753  * If non-ansi, non-gcc, then eliminate "volatile" entirely, making those
 754  * objects be read-write rather than read-only.
 755  */
 756
 757 #ifndef volatile
 758 #ifndef __STDC__
 759 # ifdef __GNUC__
 760 #  define volatile __volatile__
 761 # else
 762 #  define volatile /*nothing*/
 763 # endif /* GNUC */
 764 #endif /* STDC */
 765 #endif /* volatile */
 766
 767 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 768    FIXME: Assumes 2's complement arithmetic */
 769
 770 #if !defined (UINT_MAX)
 771 #define UINT_MAX ((unsigned int)(~0))           /* 0xFFFFFFFF for 32-bits */
 772 #endif
 773
 774 #if !defined (INT_MAX)
 775 #define INT_MAX ((int)(UINT_MAX >> 1))          /* 0x7FFFFFFF for 32-bits */
 776 #endif
 777
 778 #if !defined (INT_MIN)
 779 #define INT_MIN ((int)((int) ~0 ^ INT_MAX))     /* 0x80000000 for 32-bits */
 780 #endif
 781
 782 #if !defined (ULONG_MAX)
 783 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 784 #endif
 785
 786 #if !defined (LONG_MAX)
 787 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 788 #endif
 789
 790 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 791    arguments to a function, number in a value history, register number, etc.)
 792    where the value must not be larger than can fit in an int.  */
 793
 794 extern int longest_to_int PARAMS ((LONGEST));
 795
 796 /* Assorted functions we can declare, now that const and volatile are
 797    defined.  */
 798
 799 extern char *savestring PARAMS ((const char *, int));
 800
 801 extern char *msavestring PARAMS ((void *, const char *, int));
 802
 803 extern char *strsave PARAMS ((const char *));
 804
 805 extern char *mstrsave PARAMS ((void *, const char *));
 806
 807 #ifdef _MSC_VER /* FIXME; was long, but this causes compile errors in msvc if already defined */
 808 extern PTR xmmalloc PARAMS ((PTR, size_t));
 809
 810 extern PTR xmrealloc PARAMS ((PTR, PTR, size_t));
 811 #else
 812 extern PTR xmmalloc PARAMS ((PTR, long));
 813
 814 extern PTR xmrealloc PARAMS ((PTR, PTR, long));
 815 #endif
 816
 817 extern int parse_escape PARAMS ((char **));
 818
 819 /* Message to be printed before the error message, when an error occurs.  */
 820
 821 extern char *error_pre_print;
 822
 823 /* Message to be printed before the error message, when an error occurs.  */
 824
 825 extern char *quit_pre_print;
 826
 827 /* Message to be printed before the warning message, when a warning occurs.  */
 828
 829 extern char *warning_pre_print;
 830
 831 extern NORETURN void error PARAMS((const char *, ...)) ATTR_NORETURN;
 832
 833 extern void error_begin PARAMS ((void));
 834
 835 extern NORETURN void internal_error (char *, ...) ATTR_NORETURN;
 836
 837 extern NORETURN void nomem PARAMS ((long)) ATTR_NORETURN;
 838
 839 /* Reasons for calling return_to_top_level.  */
 840 enum return_reason {
 841   /* User interrupt.  */
 842   RETURN_QUIT,
 843
 844   /* Any other error.  */
 845   RETURN_ERROR
 846 };
 847
 848 #define ALL_CLEANUPS    ((struct cleanup *)0)
 849
 850 #define RETURN_MASK_QUIT (1 << (int)RETURN_QUIT)
 851 #define RETURN_MASK_ERROR (1 << (int)RETURN_ERROR)
 852 #define RETURN_MASK_ALL (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 853 typedef int return_mask;
 854
 855 extern NORETURN void
 856 return_to_top_level PARAMS ((enum return_reason)) ATTR_NORETURN;
 857
 858 typedef int (catch_errors_ftype) PARAMS ((PTR));
 859 extern int catch_errors PARAMS ((catch_errors_ftype *, PTR, char *, return_mask));
 860
 861 extern void warning_begin PARAMS ((void));
 862
 863 extern void warning PARAMS ((const char *, ...))
 864      ATTR_FORMAT(printf, 1, 2);
 865
 866 /* Global functions from other, non-gdb GNU thingies.
 867    Libiberty thingies are no longer declared here.  We include libiberty.h
 868    above, instead.  */
 869
 870 #ifndef GETENV_PROVIDED
 871 extern char *getenv PARAMS ((const char *));
 872 #endif
 873
 874 /* From other system libraries */
 875
 876 #ifdef HAVE_STDDEF_H
 877 #include <stddef.h>
 878 #endif
 879
 880 #ifdef HAVE_STDLIB_H
 881 #if defined(_MSC_VER) && !defined(__cplusplus)
 882 /* msvc defines these in stdlib.h for c code */
 883 #undef min
 884 #undef max
 885 #endif
 886 #include <stdlib.h>
 887 #endif
 888 #ifndef min
 889 #define min(a, b) ((a) < (b) ? (a) : (b))
 890 #endif
 891 #ifndef max
 892 #define max(a, b) ((a) > (b) ? (a) : (b))
 893 #endif
 894
 895
 896 /* We take the address of fclose later, but some stdio's forget
 897    to declare this.  We can't always declare it since there's
 898    no way to declare the parameters without upsetting some compiler
 899    somewhere. */
 900
 901 #ifndef FCLOSE_PROVIDED
 902 extern int fclose PARAMS ((FILE *));
 903 #endif
 904
 905 #ifndef atof
 906 extern double atof PARAMS ((const char *));     /* X3.159-1989  4.10.1.1 */
 907 #endif
 908
 909 #ifndef MALLOC_INCOMPATIBLE
 910
 911 #ifdef NEED_DECLARATION_MALLOC
 912 extern PTR malloc ();
 913 #endif
 914
 915 #ifdef NEED_DECLARATION_REALLOC
 916 extern PTR realloc ();
 917 #endif
 918
 919 #ifdef NEED_DECLARATION_FREE
 920 extern void free ();
 921 #endif
 922
 923 #endif /* MALLOC_INCOMPATIBLE */
 924
 925 /* Various possibilities for alloca.  */
 926 #ifndef alloca
 927 # ifdef __GNUC__
 928 #  define alloca __builtin_alloca
 929 # else /* Not GNU C */
 930 #  ifdef HAVE_ALLOCA_H
 931 #   include <alloca.h>
 932 #  else
 933 #   ifdef _AIX
 934  #pragma alloca
 935 #   else
 936
 937 /* We need to be careful not to declare this in a way which conflicts with
 938    bison.  Bison never declares it as char *, but under various circumstances
 939    (like __hpux) we need to use void *.  */
 940 #    if defined (__STDC__) || defined (__hpux)
 941    extern void *alloca ();
 942 #    else /* Don't use void *.  */
 943    extern char *alloca ();
 944 #    endif /* Don't use void *.  */
 945 #   endif /* Not _AIX */
 946 #  endif /* Not HAVE_ALLOCA_H */
 947 # endif /* Not GNU C */
 948 #endif /* alloca not defined */
 949
 950 /* HOST_BYTE_ORDER must be defined to one of these.  */
 951
 952 #ifdef HAVE_ENDIAN_H
 953 #include <endian.h>
 954 #endif
 955
 956 #if !defined (BIG_ENDIAN)
 957 #define BIG_ENDIAN 4321
 958 #endif
 959
 960 #if !defined (LITTLE_ENDIAN)
 961 #define LITTLE_ENDIAN 1234
 962 #endif
 963
 964 /* Dynamic target-system-dependent parameters for GDB. */
 965 #include "gdbarch.h"
 966
 967 /* Static target-system-dependent parameters for GDB. */
 968
 969 /* Number of bits in a char or unsigned char for the target machine.
 970    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 971 #if !defined (TARGET_CHAR_BIT)
 972 #define TARGET_CHAR_BIT 8
 973 #endif
 974
 975 /* Number of bits in a short or unsigned short for the target machine. */
 976 #if !defined (TARGET_SHORT_BIT)
 977 #define TARGET_SHORT_BIT (2 * TARGET_CHAR_BIT)
 978 #endif
 979
 980 /* Number of bits in an int or unsigned int for the target machine. */
 981 #if !defined (TARGET_INT_BIT)
 982 #define TARGET_INT_BIT (4 * TARGET_CHAR_BIT)
 983 #endif
 984
 985 /* Number of bits in a long or unsigned long for the target machine. */
 986 #if !defined (TARGET_LONG_BIT)
 987 #define TARGET_LONG_BIT (4 * TARGET_CHAR_BIT)
 988 #endif
 989
 990 /* Number of bits in a long long or unsigned long long for the target machine. */
 991 #if !defined (TARGET_LONG_LONG_BIT)
 992 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 993 #endif
 994
 995 /* Number of bits in a float for the target machine. */
 996 #if !defined (TARGET_FLOAT_BIT)
 997 #define TARGET_FLOAT_BIT (4 * TARGET_CHAR_BIT)
 998 #endif
 999
1000 /* Number of bits in a double for the target machine. */
1001 #if !defined (TARGET_DOUBLE_BIT)
1002 #define TARGET_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
1003 #endif
1004
1005 /* Number of bits in a long double for the target machine.  */
1006 #if !defined (TARGET_LONG_DOUBLE_BIT)
1007 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
1008 #endif
1009
1010 /* Number of bits in a pointer for the target machine */
1011 #if !defined (TARGET_PTR_BIT)
1012 #define TARGET_PTR_BIT TARGET_INT_BIT
1013 #endif
1014
1015 /* If we picked up a copy of CHAR_BIT from a configuration file
1016    (which may get it by including <limits.h>) then use it to set
1017    the number of bits in a host char.  If not, use the same size
1018    as the target. */
1019
1020 #if defined (CHAR_BIT)
1021 #define HOST_CHAR_BIT CHAR_BIT
1022 #else
1023 #define HOST_CHAR_BIT TARGET_CHAR_BIT
1024 #endif
1025
1026 /* The bit byte-order has to do just with numbering of bits in
1027    debugging symbols and such.  Conceptually, it's quite separate
1028    from byte/word byte order.  */
1029
1030 #if !defined (BITS_BIG_ENDIAN)
1031 #define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BIG_ENDIAN)
1032 #endif
1033
1034 /* In findvar.c.  */
1035
1036 extern LONGEST extract_signed_integer PARAMS ((void *, int));
1037
1038 extern ULONGEST extract_unsigned_integer PARAMS ((void *, int));
1039
1040 extern int extract_long_unsigned_integer PARAMS ((void *, int, LONGEST *));
1041
1042 extern CORE_ADDR extract_address PARAMS ((void *, int));
1043
1044 extern void store_signed_integer PARAMS ((PTR, int, LONGEST));
1045
1046 extern void store_unsigned_integer PARAMS ((PTR, int, ULONGEST));
1047
1048 extern void store_address PARAMS ((PTR, int, LONGEST));
1049
1050 /* Setup definitions for host and target floating point formats.  We need to
1051    consider the format for `float', `double', and `long double' for both target
1052    and host.  We need to do this so that we know what kind of conversions need
1053    to be done when converting target numbers to and from the hosts DOUBLEST
1054    data type.  */
1055
1056 /* This is used to indicate that we don't know the format of the floating point
1057    number.  Typically, this is useful for native ports, where the actual format
1058    is irrelevant, since no conversions will be taking place.  */
1059
1060 extern const struct floatformat floatformat_unknown;
1061
1062 #if HOST_BYTE_ORDER == BIG_ENDIAN
1063 #  ifndef HOST_FLOAT_FORMAT
1064 #    define HOST_FLOAT_FORMAT &floatformat_ieee_single_big
1065 #  endif
1066 #  ifndef HOST_DOUBLE_FORMAT
1067 #    define HOST_DOUBLE_FORMAT &floatformat_ieee_double_big
1068 #  endif
1069 #else                           /* LITTLE_ENDIAN */
1070 #  ifndef HOST_FLOAT_FORMAT
1071 #    define HOST_FLOAT_FORMAT &floatformat_ieee_single_little
1072 #  endif
1073 #  ifndef HOST_DOUBLE_FORMAT
1074 #    define HOST_DOUBLE_FORMAT &floatformat_ieee_double_little
1075 #  endif
1076 #endif
1077
1078 #ifndef HOST_LONG_DOUBLE_FORMAT
1079 #define HOST_LONG_DOUBLE_FORMAT &floatformat_unknown
1080 #endif
1081
1082 #ifndef TARGET_FLOAT_FORMAT
1083 #define TARGET_FLOAT_FORMAT (TARGET_BYTE_ORDER == BIG_ENDIAN \
1084                              ? &floatformat_ieee_single_big \
1085                              : &floatformat_ieee_single_little)
1086 #endif
1087 #ifndef TARGET_DOUBLE_FORMAT
1088 #define TARGET_DOUBLE_FORMAT (TARGET_BYTE_ORDER == BIG_ENDIAN \
1089                               ? &floatformat_ieee_double_big \
1090                               : &floatformat_ieee_double_little)
1091 #endif
1092
1093 #ifndef TARGET_LONG_DOUBLE_FORMAT
1094 #  define TARGET_LONG_DOUBLE_FORMAT &floatformat_unknown
1095 #endif
1096
1097 /* Use `long double' if the host compiler supports it.  (Note that this is not
1098    necessarily any longer than `double'.  On SunOS/gcc, it's the same as
1099    double.)  This is necessary because GDB internally converts all floating
1100    point values to the widest type supported by the host.
1101
1102    There are problems however, when the target `long double' is longer than the
1103    host's `long double'.  In general, we'll probably reduce the precision of
1104    any such values and print a warning.  */
1105
1106 #ifdef HAVE_LONG_DOUBLE
1107 typedef long double DOUBLEST;
1108 #else
1109 typedef double DOUBLEST;
1110 #endif
1111
1112 extern void floatformat_to_doublest PARAMS ((const struct floatformat *,
1113                                              char *, DOUBLEST *));
1114 extern void floatformat_from_doublest PARAMS ((const struct floatformat *,
1115                                                DOUBLEST *, char *));
1116 extern DOUBLEST extract_floating PARAMS ((void *, int));
1117
1118 extern void store_floating PARAMS ((void *, int, DOUBLEST));
1119 \f
1120 /* On some machines there are bits in addresses which are not really
1121    part of the address, but are used by the kernel, the hardware, etc.
1122    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
1123    so we get a "real" address such as one would find in a symbol
1124    table.  This is used only for addresses of instructions, and even then
1125    I'm not sure it's used in all contexts.  It exists to deal with there
1126    being a few stray bits in the PC which would mislead us, not as some sort
1127    of generic thing to handle alignment or segmentation (it's possible it
1128    should be in TARGET_READ_PC instead). */
1129 #if !defined (ADDR_BITS_REMOVE)
1130 #define ADDR_BITS_REMOVE(addr) (addr)
1131 #endif /* No ADDR_BITS_REMOVE.  */
1132
1133 /* From valops.c */
1134
1135 extern CORE_ADDR push_bytes PARAMS ((CORE_ADDR, char *, int));
1136
1137 extern CORE_ADDR push_word PARAMS ((CORE_ADDR, ULONGEST));
1138
1139 extern int watchdog;
1140
1141 /* Hooks for alternate command interfaces.  */
1142 struct target_waitstatus;
1143 struct cmd_list_element;
1144
1145 /* Should the asynchronous variant of the interpreter (using the
1146    event-loop) be enabled? */
1147 extern int async_p;
1148
1149 extern void (*init_ui_hook) PARAMS ((char *argv0));
1150 extern void (*command_loop_hook) PARAMS ((void));
1151 extern void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer,
1152                                               GDB_FILE *stream));
1153 extern void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s,
1154                                                       int line, int stopline,
1155                                                       int noerror));
1156 extern struct frame_info *parse_frame_specification PARAMS ((char *frame_exp));
1157 extern int  (*query_hook) PARAMS ((const char *, va_list));
1158 extern void (*warning_hook) PARAMS ((const char *, va_list));
1159 extern void (*flush_hook) PARAMS ((GDB_FILE *stream));
1160 extern void (*create_breakpoint_hook) PARAMS ((struct breakpoint *b));
1161 extern void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
1162 extern void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
1163 extern void (*interactive_hook) PARAMS ((void));
1164 extern void (*registers_changed_hook) PARAMS ((void));
1165 extern void (*readline_begin_hook) PARAMS ((char *, ...));
1166 extern char * (*readline_hook) PARAMS ((char *));
1167 extern void (*readline_end_hook) PARAMS ((void));
1168 extern void (*register_changed_hook) PARAMS ((int regno));
1169 extern void (*memory_changed_hook) PARAMS ((CORE_ADDR addr, int len));
1170 extern void (*context_hook) PARAMS ((int));
1171 extern int (*target_wait_hook) PARAMS ((int pid,
1172                                         struct target_waitstatus *status));
1173
1174 extern void (*call_command_hook) PARAMS ((struct cmd_list_element *c,
1175                                           char *cmd, int from_tty));
1176
1177 extern void (*set_hook) PARAMS ((struct cmd_list_element *c));
1178
1179 extern NORETURN void (*error_hook) PARAMS ((void)) ATTR_NORETURN;
1180
1181 extern void (*error_begin_hook) PARAMS ((void));
1182
1183
1184 /* Inhibit window interface if non-zero. */
1185
1186 extern int use_windows;
1187
1188 /* Symbolic definitions of filename-related things.  */
1189 /* FIXME, this doesn't work very well if host and executable
1190    filesystems conventions are different.  */
1191
1192 #ifndef DIRNAME_SEPARATOR
1193 #define DIRNAME_SEPARATOR ':'
1194 #endif
1195
1196 #ifndef SLASH_P
1197 #if defined(__GO32__)||defined(_WIN32)
1198 #define SLASH_P(X) ((X)=='\\')
1199 #else
1200 #define SLASH_P(X) ((X)=='/')
1201 #endif
1202 #endif
1203
1204 #ifndef SLASH_CHAR
1205 #if defined(__GO32__)||defined(_WIN32)
1206 #define SLASH_CHAR '\\'
1207 #else
1208 #define SLASH_CHAR '/'
1209 #endif
1210 #endif
1211
1212 #ifndef SLASH_STRING
1213 #if defined(__GO32__)||defined(_WIN32)
1214 #define SLASH_STRING "\\"
1215 #else
1216 #define SLASH_STRING "/"
1217 #endif
1218 #endif
1219
1220 #ifndef ROOTED_P
1221 #define ROOTED_P(X) (SLASH_P((X)[0]))
1222 #endif
1223
1224 /* On some systems, PIDGET is defined to extract the inferior pid from
1225    an internal pid that has the thread id and pid in seperate bit
1226    fields.  If not defined, then just use the entire internal pid as
1227    the actual pid. */
1228
1229 #ifndef PIDGET
1230 #define PIDGET(pid) (pid)
1231 #endif
1232
1233 /* If under Cygwin, provide backwards compatibility with older
1234    Cygwin compilers that don't define the current cpp define. */
1235 #ifdef __CYGWIN32__
1236 #ifndef __CYGWIN__
1237 #define __CYGWIN__
1238 #endif
1239 #endif
1240
1241 /* Define well known filenos if the system does not define them.  */
1242 #ifndef STDIN_FILENO
1243 #define STDIN_FILENO   0
1244 #endif
1245 #ifndef STDOUT_FILENO
1246 #define STDOUT_FILENO  1
1247 #endif
1248 #ifndef STDERR_FILENO
1249 #define STDERR_FILENO  2
1250 #endif
1251
1252 /* If this definition isn't overridden by the header files, assume
1253    that isatty and fileno exist on this system.  */
1254 #ifndef ISATTY
1255 #define ISATTY(FP)      (isatty (fileno (FP)))
1256 #endif
1257
1258 #endif /* #ifndef DEFS_H */