include/libiberty.h

   1 /* Function declarations for libiberty.
   2
   3    Copyright (C) 1997-2015 Free Software Foundation, Inc.
   4
   5    Note - certain prototypes declared in this header file are for
   6    functions whoes implementation copyright does not belong to the
   7    FSF.  Those prototypes are present in this file for reference
   8    purposes only and their presence in this file should not construed
   9    as an indication of ownership by the FSF of the implementation of
  10    those functions in any way or form whatsoever.
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 2, or (at your option)
  15    any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 51 Franklin Street - Fifth Floor,
  25    Boston, MA 02110-1301, USA.
  26
  27    Written by Cygnus Support, 1994.
  28
  29    The libiberty library provides a number of functions which are
  30    missing on some operating systems.  We do not declare those here,
  31    to avoid conflicts with the system header files on operating
  32    systems that do support those functions.  In this file we only
  33    declare those functions which are specific to libiberty.  */
  34
  35 #ifndef LIBIBERTY_H
  36 #define LIBIBERTY_H
  37
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 #include "ansidecl.h"
  43
  44 /* Get a definition for size_t.  */
  45 #include <stddef.h>
  46 /* Get a definition for va_list.  */
  47 #include <stdarg.h>
  48
  49 #include <stdio.h>
  50
  51 /* If the OS supports it, ensure that the supplied stream is setup to
  52    avoid any multi-threaded locking.  Otherwise leave the FILE pointer
  53    unchanged.  If the stream is NULL do nothing.  */
  54
  55 extern void unlock_stream (FILE *);
  56
  57 /* If the OS supports it, ensure that the standard I/O streams, stdin,
  58    stdout and stderr are setup to avoid any multi-threaded locking.
  59    Otherwise do nothing.  */
  60
  61 extern void unlock_std_streams (void);
  62
  63 /* Open and return a FILE pointer.  If the OS supports it, ensure that
  64    the stream is setup to avoid any multi-threaded locking.  Otherwise
  65    return the FILE pointer unchanged.  */
  66
  67 extern FILE *fopen_unlocked (const char *, const char *);
  68 extern FILE *fdopen_unlocked (int, const char *);
  69 extern FILE *freopen_unlocked (const char *, const char *, FILE *);
  70
  71 /* Build an argument vector from a string.  Allocates memory using
  72    malloc.  Use freeargv to free the vector.  */
  73
  74 extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
  75
  76 /* Free a vector returned by buildargv.  */
  77
  78 extern void freeargv (char **);
  79
  80 /* Duplicate an argument vector. Allocates memory using malloc.  Use
  81    freeargv to free the vector.  */
  82
  83 extern char **dupargv (char **) ATTRIBUTE_MALLOC;
  84
  85 /* Expand "@file" arguments in argv.  */
  86
  87 extern void expandargv (int *, char ***);
  88
  89 /* Write argv to an @-file, inserting necessary quoting.  */
  90
  91 extern int writeargv (char **, FILE *);
  92
  93 /* Return the number of elements in argv.  */
  94
  95 extern int countargv (char**);
  96
  97 /* Return the last component of a path name.  Note that we can't use a
  98    prototype here because the parameter is declared inconsistently
  99    across different systems, sometimes as "char *" and sometimes as
 100    "const char *" */
 101
 102 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1.  If it is
 103    undefined, we haven't run the autoconf check so provide the
 104    declaration without arguments.  If it is 0, we checked and failed
 105    to find the declaration so provide a fully prototyped one.  If it
 106    is 1, we found it so don't provide any declaration at all.  */
 107 #if !HAVE_DECL_BASENAME
 108 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) \
 109  || defined (__FreeBSD__) || defined (__OpenBSD__) || defined (__NetBSD__) \
 110  || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) \
 111  || defined (__DragonFly__) || defined (HAVE_DECL_BASENAME)
 112 extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 113 #else
 114 /* Do not allow basename to be used if there is no prototype seen.  We
 115    either need to use the above prototype or have one from
 116    autoconf which would result in HAVE_DECL_BASENAME being set.  */
 117 #define basename basename_cannot_be_used_without_a_prototype
 118 #endif
 119 #endif
 120
 121 /* A well-defined basename () that is always compiled in.  */
 122
 123 extern const char *lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 124
 125 /* Same, but assumes DOS semantics (drive name, backslash is also a
 126    dir separator) regardless of host.  */
 127
 128 extern const char *dos_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 129
 130 /* Same, but assumes Unix semantics (absolute paths always start with
 131    a slash, only forward slash is accepted as dir separator)
 132    regardless of host.  */
 133
 134 extern const char *unix_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 135
 136 /* A well-defined realpath () that is always compiled in.  */
 137
 138 extern char *lrealpath (const char *);
 139
 140 /* Concatenate an arbitrary number of strings.  You must pass NULL as
 141    the last argument of this function, to terminate the list of
 142    strings.  Allocates memory using xmalloc.  */
 143
 144 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
 145
 146 /* Concatenate an arbitrary number of strings.  You must pass NULL as
 147    the last argument of this function, to terminate the list of
 148    strings.  Allocates memory using xmalloc.  The first argument is
 149    not one of the strings to be concatenated, but if not NULL is a
 150    pointer to be freed after the new string is created, similar to the
 151    way xrealloc works.  */
 152
 153 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
 154
 155 /* Determine the length of concatenating an arbitrary number of
 156    strings.  You must pass NULL as the last argument of this function,
 157    to terminate the list of strings.  */
 158
 159 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
 160
 161 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
 162    memory.  You must pass NULL as the last argument of this function,
 163    to terminate the list of strings.  The supplied memory is assumed
 164    to be large enough.  */
 165
 166 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;
 167
 168 /* Concatenate an arbitrary number of strings into a GLOBAL area of
 169    memory.  You must pass NULL as the last argument of this function,
 170    to terminate the list of strings.  The supplied memory is assumed
 171    to be large enough.  */
 172
 173 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
 174
 175 /* This is the global area used by concat_copy2.  */
 176
 177 extern char *libiberty_concat_ptr;
 178
 179 /* Concatenate an arbitrary number of strings.  You must pass NULL as
 180    the last argument of this function, to terminate the list of
 181    strings.  Allocates memory using alloca.  The arguments are
 182    evaluated twice!  */
 183 #define ACONCAT(ACONCAT_PARAMS) \
 184   (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
 185    concat_copy2 ACONCAT_PARAMS)
 186
 187 /* Check whether two file descriptors refer to the same file.  */
 188
 189 extern int fdmatch (int fd1, int fd2);
 190
 191 /* Return the position of the first bit set in the argument.  */
 192 /* Prototypes vary from system to system, so we only provide a
 193    prototype on systems where we know that we need it.  */
 194 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
 195 extern int ffs(int);
 196 #endif
 197
 198 /* Get the working directory.  The result is cached, so don't call
 199    chdir() between calls to getpwd().  */
 200
 201 extern char * getpwd (void);
 202
 203 /* Get the current time.  */
 204 /* Prototypes vary from system to system, so we only provide a
 205    prototype on systems where we know that we need it.  */
 206 #ifdef __MINGW32__
 207 /* Forward declaration to avoid #include <sys/time.h>.   */
 208 struct timeval;
 209 extern int gettimeofday (struct timeval *, void *);
 210 #endif
 211
 212 /* Get the amount of time the process has run, in microseconds.  */
 213
 214 extern long get_run_time (void);
 215
 216 /* Generate a relocated path to some installation directory.  Allocates
 217    return value using malloc.  */
 218
 219 extern char *make_relative_prefix (const char *, const char *,
 220                                    const char *) ATTRIBUTE_MALLOC;
 221
 222 /* Generate a relocated path to some installation directory without
 223    attempting to follow any soft links.  Allocates
 224    return value using malloc.  */
 225
 226 extern char *make_relative_prefix_ignore_links (const char *, const char *,
 227                                                 const char *) ATTRIBUTE_MALLOC;
 228
 229 /* Returns a pointer to a directory path suitable for creating temporary
 230    files in.  */
 231
 232 extern const char *choose_tmpdir (void) ATTRIBUTE_RETURNS_NONNULL;
 233
 234 /* Choose a temporary directory to use for scratch files.  */
 235
 236 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 237
 238 /* Return a temporary file name or NULL if unable to create one.  */
 239
 240 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
 241
 242 /* Remove a link to a file unless it is special. */
 243
 244 extern int unlink_if_ordinary (const char *);
 245
 246 /* Allocate memory filled with spaces.  Allocates using malloc.  */
 247
 248 extern const char *spaces (int count);
 249
 250 /* Return the maximum error number for which strerror will return a
 251    string.  */
 252
 253 extern int errno_max (void);
 254
 255 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
 256    "EINVAL").  */
 257
 258 extern const char *strerrno (int);
 259
 260 /* Given the name of an errno value, return the value.  */
 261
 262 extern int strtoerrno (const char *);
 263
 264 /* ANSI's strerror(), but more robust.  */
 265
 266 extern char *xstrerror (int) ATTRIBUTE_RETURNS_NONNULL;
 267
 268 /* Return the maximum signal number for which strsignal will return a
 269    string.  */
 270
 271 extern int signo_max (void);
 272
 273 /* Return a signal message string for a signal number
 274    (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
 275 /* This is commented out as it can conflict with one in system headers.
 276    We still document its existence though.  */
 277
 278 /*extern const char *strsignal (int);*/
 279
 280 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
 281    "SIGHUP").  */
 282
 283 extern const char *strsigno (int);
 284
 285 /* Given the name of a signal, return its number.  */
 286
 287 extern int strtosigno (const char *);
 288
 289 /* Register a function to be run by xexit.  Returns 0 on success.  */
 290
 291 extern int xatexit (void (*fn) (void));
 292
 293 /* Exit, calling all the functions registered with xatexit.  */
 294
 295 extern void xexit (int status) ATTRIBUTE_NORETURN;
 296
 297 /* Set the program name used by xmalloc.  */
 298
 299 extern void xmalloc_set_program_name (const char *);
 300
 301 /* Report an allocation failure.  */
 302 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
 303
 304 /* Allocate memory without fail.  If malloc fails, this will print a
 305    message to stderr (using the name set by xmalloc_set_program_name,
 306    if any) and then call xexit.  */
 307
 308 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 309
 310 /* Reallocate memory without fail.  This works like xmalloc.  Note,
 311    realloc type functions are not suitable for attribute malloc since
 312    they may return the same address across multiple calls. */
 313
 314 extern void *xrealloc (void *, size_t) ATTRIBUTE_RETURNS_NONNULL;
 315
 316 /* Allocate memory without fail and set it to zero.  This works like
 317    xmalloc.  */
 318
 319 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 320
 321 /* Copy a string into a memory buffer without fail.  */
 322
 323 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 324
 325 /* Copy at most N characters from string into a buffer without fail.  */
 326
 327 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 328
 329 /* Copy an existing memory buffer to a new memory buffer without fail.  */
 330
 331 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 332
 333 /* Physical memory routines.  Return values are in BYTES.  */
 334 extern double physmem_total (void);
 335 extern double physmem_available (void);
 336
 337 /* Compute the 32-bit CRC of a block of memory.  */
 338 extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
 339
 340 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
 341    with nice encapsulation.  The XDELETE*() macros are technically
 342    superfluous, but provided here for symmetry.  Using them consistently
 343    makes it easier to update client code to use different allocators such
 344    as new/delete and new[]/delete[].  */
 345
 346 /* Scalar allocators.  */
 347
 348 #define XALLOCA(T)              ((T *) alloca (sizeof (T)))
 349 #define XNEW(T)                 ((T *) xmalloc (sizeof (T)))
 350 #define XCNEW(T)                ((T *) xcalloc (1, sizeof (T)))
 351 #define XDUP(T, P)              ((T *) xmemdup ((P), sizeof (T), sizeof (T)))
 352 #define XDELETE(P)              free ((void*) (P))
 353
 354 /* Array allocators.  */
 355
 356 #define XALLOCAVEC(T, N)        ((T *) alloca (sizeof (T) * (N)))
 357 #define XNEWVEC(T, N)           ((T *) xmalloc (sizeof (T) * (N)))
 358 #define XCNEWVEC(T, N)          ((T *) xcalloc ((N), sizeof (T)))
 359 #define XDUPVEC(T, P, N)        ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N)))
 360 #define XRESIZEVEC(T, P, N)     ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
 361 #define XDELETEVEC(P)           free ((void*) (P))
 362
 363 /* Allocators for variable-sized structures and raw buffers.  */
 364
 365 #define XALLOCAVAR(T, S)        ((T *) alloca ((S)))
 366 #define XNEWVAR(T, S)           ((T *) xmalloc ((S)))
 367 #define XCNEWVAR(T, S)          ((T *) xcalloc (1, (S)))
 368 #define XDUPVAR(T, P, S1, S2)   ((T *) xmemdup ((P), (S1), (S2)))
 369 #define XRESIZEVAR(T, P, S)     ((T *) xrealloc ((P), (S)))
 370
 371 /* Type-safe obstack allocator.  */
 372
 373 #define XOBNEW(O, T)            ((T *) obstack_alloc ((O), sizeof (T)))
 374 #define XOBNEWVEC(O, T, N)      ((T *) obstack_alloc ((O), sizeof (T) * (N)))
 375 #define XOBNEWVAR(O, T, S)      ((T *) obstack_alloc ((O), (S)))
 376 #define XOBFINISH(O, T)         ((T) obstack_finish ((O)))
 377
 378 /* hex character manipulation routines */
 379
 380 #define _hex_array_size 256
 381 #define _hex_bad        99
 382 extern const unsigned char _hex_value[_hex_array_size];
 383 extern void hex_init (void);
 384 #define hex_p(c)        (hex_value (c) != _hex_bad)
 385 /* If you change this, note well: Some code relies on side effects in
 386    the argument being performed exactly once.  */
 387 #define hex_value(c)    ((unsigned int) _hex_value[(unsigned char) (c)])
 388
 389 /* Flags for pex_init.  These are bits to be or'ed together.  */
 390
 391 /* Record subprocess times, if possible.  */
 392 #define PEX_RECORD_TIMES        0x1
 393
 394 /* Use pipes for communication between processes, if possible.  */
 395 #define PEX_USE_PIPES           0x2
 396
 397 /* Save files used for communication between processes.  */
 398 #define PEX_SAVE_TEMPS          0x4
 399
 400 /* Prepare to execute one or more programs, with standard output of
 401    each program fed to standard input of the next.
 402    FLAGS        As above.
 403    PNAME        The name of the program to report in error messages.
 404    TEMPBASE     A base name to use for temporary files; may be NULL to
 405                 use a random name.
 406    Returns NULL on error.  */
 407
 408 extern struct pex_obj *pex_init (int flags, const char *pname,
 409                                  const char *tempbase) ATTRIBUTE_RETURNS_NONNULL;
 410
 411 /* Flags for pex_run.  These are bits to be or'ed together.  */
 412
 413 /* Last program in pipeline.  Standard output of program goes to
 414    OUTNAME, or, if OUTNAME is NULL, to standard output of caller.  Do
 415    not set this if you want to call pex_read_output.  After this is
 416    set, pex_run may no longer be called with the same struct
 417    pex_obj.  */
 418 #define PEX_LAST                0x1
 419
 420 /* Search for program in executable search path.  */
 421 #define PEX_SEARCH              0x2
 422
 423 /* OUTNAME is a suffix.  */
 424 #define PEX_SUFFIX              0x4
 425
 426 /* Send program's standard error to standard output.  */
 427 #define PEX_STDERR_TO_STDOUT    0x8
 428
 429 /* Input file should be opened in binary mode.  This flag is ignored
 430    on Unix.  */
 431 #define PEX_BINARY_INPUT        0x10
 432
 433 /* Output file should be opened in binary mode.  This flag is ignored
 434    on Unix.  For proper behaviour PEX_BINARY_INPUT and
 435    PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
 436    PEX_BINARY_OUTPUT should be followed by a call using
 437    PEX_BINARY_INPUT.  */
 438 #define PEX_BINARY_OUTPUT       0x20
 439
 440 /* Capture stderr to a pipe.  The output can be read by
 441    calling pex_read_err and reading from the returned
 442    FILE object.  This flag may be specified only for
 443    the last program in a pipeline.
 444
 445    This flag is supported only on Unix and Windows.  */
 446 #define PEX_STDERR_TO_PIPE      0x40
 447
 448 /* Capture stderr in binary mode.  This flag is ignored
 449    on Unix.  */
 450 #define PEX_BINARY_ERROR        0x80
 451
 452 /* Append stdout to existing file instead of truncating it.  */
 453 #define PEX_STDOUT_APPEND       0x100
 454
 455 /* Thes same as PEX_STDOUT_APPEND, but for STDERR.  */
 456 #define PEX_STDERR_APPEND       0x200
 457
 458 /* Execute one program.  Returns NULL on success.  On error returns an
 459    error string (typically just the name of a system call); the error
 460    string is statically allocated.
 461
 462    OBJ          Returned by pex_init.
 463
 464    FLAGS        As above.
 465
 466    EXECUTABLE   The program to execute.
 467
 468    ARGV         NULL terminated array of arguments to pass to the program.
 469
 470    OUTNAME      Sets the output file name as follows:
 471
 472                 PEX_SUFFIX set (OUTNAME may not be NULL):
 473                   TEMPBASE parameter to pex_init not NULL:
 474                     Output file name is the concatenation of TEMPBASE
 475                     and OUTNAME.
 476                   TEMPBASE is NULL:
 477                     Output file name is a random file name ending in
 478                     OUTNAME.
 479                 PEX_SUFFIX not set:
 480                   OUTNAME not NULL:
 481                     Output file name is OUTNAME.
 482                   OUTNAME NULL, TEMPBASE not NULL:
 483                     Output file name is randomly chosen using
 484                     TEMPBASE.
 485                   OUTNAME NULL, TEMPBASE NULL:
 486                     Output file name is randomly chosen.
 487
 488                 If PEX_LAST is not set, the output file name is the
 489                 name to use for a temporary file holding stdout, if
 490                 any (there will not be a file if PEX_USE_PIPES is set
 491                 and the system supports pipes).  If a file is used, it
 492                 will be removed when no longer needed unless
 493                 PEX_SAVE_TEMPS is set.
 494
 495                 If PEX_LAST is set, and OUTNAME is not NULL, standard
 496                 output is written to the output file name.  The file
 497                 will not be removed.  If PEX_LAST and PEX_SUFFIX are
 498                 both set, TEMPBASE may not be NULL.
 499
 500    ERRNAME      If not NULL, this is the name of a file to which
 501                 standard error is written.  If NULL, standard error of
 502                 the program is standard error of the caller.
 503
 504    ERR          On an error return, *ERR is set to an errno value, or
 505                 to 0 if there is no relevant errno.
 506 */
 507
 508 extern const char *pex_run (struct pex_obj *obj, int flags,
 509                             const char *executable, char * const *argv,
 510                             const char *outname, const char *errname,
 511                             int *err);
 512
 513 /* As for pex_run (), but takes an extra parameter to enable the
 514    environment for the child process to be specified.
 515
 516    ENV          The environment for the child process, specified as
 517                 an array of character pointers.  Each element of the
 518                 array should point to a string of the form VAR=VALUE,
 519                 with the exception of the last element which must be
 520                 a null pointer.
 521 */
 522
 523 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
 524                                            const char *executable,
 525                                            char * const *argv,
 526                                            char * const *env,
 527                                            const char *outname,
 528                                            const char *errname, int *err);
 529
 530 /* Return a stream for a temporary file to pass to the first program
 531    in the pipeline as input.  The file name is chosen as for pex_run.
 532    pex_run closes the file automatically; don't close it yourself.  */
 533
 534 extern FILE *pex_input_file (struct pex_obj *obj, int flags,
 535                              const char *in_name);
 536
 537 /* Return a stream for a pipe connected to the standard input of the
 538    first program in the pipeline.  You must have passed
 539    `PEX_USE_PIPES' to `pex_init'.  Close the returned stream
 540    yourself.  */
 541
 542 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
 543
 544 /* Read the standard output of the last program to be executed.
 545    pex_run can not be called after this.  BINARY should be non-zero if
 546    the file should be opened in binary mode; this is ignored on Unix.
 547    Returns NULL on error.  Don't call fclose on the returned FILE; it
 548    will be closed by pex_free.  */
 549
 550 extern FILE *pex_read_output (struct pex_obj *, int binary);
 551
 552 /* Read the standard error of the last program to be executed.
 553    pex_run can not be called after this.  BINARY should be non-zero if
 554    the file should be opened in binary mode; this is ignored on Unix.
 555    Returns NULL on error.  Don't call fclose on the returned FILE; it
 556    will be closed by pex_free.  */
 557
 558 extern FILE *pex_read_err (struct pex_obj *, int binary);
 559
 560 /* Return exit status of all programs in VECTOR.  COUNT indicates the
 561    size of VECTOR.  The status codes in the vector are in the order of
 562    the calls to pex_run.  Returns 0 on error, 1 on success.  */
 563
 564 extern int pex_get_status (struct pex_obj *, int count, int *vector);
 565
 566 /* Return times of all programs in VECTOR.  COUNT indicates the size
 567    of VECTOR.  struct pex_time is really just struct timeval, but that
 568    is not portable to all systems.  Returns 0 on error, 1 on
 569    success.  */
 570
 571 struct pex_time
 572 {
 573   unsigned long user_seconds;
 574   unsigned long user_microseconds;
 575   unsigned long system_seconds;
 576   unsigned long system_microseconds;
 577 };
 578
 579 extern int pex_get_times (struct pex_obj *, int count,
 580                           struct pex_time *vector);
 581
 582 /* Clean up a pex_obj.  If you have not called pex_get_times or
 583    pex_get_status, this will try to kill the subprocesses.  */
 584
 585 extern void pex_free (struct pex_obj *);
 586
 587 /* Just execute one program.  Return value is as for pex_run.
 588    FLAGS        Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
 589    EXECUTABLE   As for pex_run.
 590    ARGV         As for pex_run.
 591    PNAME        As for pex_init.
 592    OUTNAME      As for pex_run when PEX_LAST is set.
 593    ERRNAME      As for pex_run.
 594    STATUS       Set to exit status on success.
 595    ERR          As for pex_run.
 596 */
 597
 598 extern const char *pex_one (int flags, const char *executable,
 599                             char * const *argv, const char *pname,
 600                             const char *outname, const char *errname,
 601                             int *status, int *err);
 602
 603 /* pexecute and pwait are the old pexecute interface, still here for
 604    backward compatibility.  Don't use these for new code.  Instead,
 605    use pex_init/pex_run/pex_get_status/pex_free, or pex_one.  */
 606
 607 /* Definitions used by the pexecute routine.  */
 608
 609 #define PEXECUTE_FIRST   1
 610 #define PEXECUTE_LAST    2
 611 #define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
 612 #define PEXECUTE_SEARCH  4
 613 #define PEXECUTE_VERBOSE 8
 614
 615 /* Execute a program.  */
 616
 617 extern int pexecute (const char *, char * const *, const char *,
 618                      const char *, char **, char **, int);
 619
 620 /* Wait for pexecute to finish.  */
 621
 622 extern int pwait (int, int *, int);
 623
 624 #if !HAVE_DECL_ASPRINTF
 625 /* Like sprintf but provides a pointer to malloc'd storage, which must
 626    be freed by the caller.  */
 627
 628 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
 629 #endif
 630
 631 /* Like asprintf but allocates memory without fail. This works like
 632    xmalloc.  */
 633
 634 extern char *xasprintf (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF_1;
 635
 636 #if !HAVE_DECL_VASPRINTF
 637 /* Like vsprintf but provides a pointer to malloc'd storage, which
 638    must be freed by the caller.  */
 639
 640 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
 641 #endif
 642
 643 /* Like vasprintf but allocates memory without fail. This works like
 644    xmalloc.  */
 645
 646 extern char *xvasprintf (const char *, va_list) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF(1,0);
 647
 648 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 649 /* Like sprintf but prints at most N characters.  */
 650 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
 651 #endif
 652
 653 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 654 /* Like vsprintf but prints at most N characters.  */
 655 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
 656 #endif
 657
 658 #if defined (HAVE_DECL_STRNLEN) && !HAVE_DECL_STRNLEN
 659 extern size_t strnlen (const char *, size_t);
 660 #endif
 661
 662 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
 663 /* Compare version strings.  */
 664 extern int strverscmp (const char *, const char *);
 665 #endif
 666
 667 #if defined(HAVE_DECL_STRTOL) && !HAVE_DECL_STRTOL
 668 extern long int strtol (const char *nptr,
 669                         char **endptr, int base);
 670 #endif
 671
 672 #if defined(HAVE_DECL_STRTOUL) && !HAVE_DECL_STRTOUL
 673 extern unsigned long int strtoul (const char *nptr,
 674                                   char **endptr, int base);
 675 #endif
 676
 677 #if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOLL) && !HAVE_DECL_STRTOLL
 678 __extension__
 679 extern long long int strtoll (const char *nptr,
 680                               char **endptr, int base);
 681 #endif
 682
 683 #if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOULL) && !HAVE_DECL_STRTOULL
 684 __extension__
 685 extern unsigned long long int strtoull (const char *nptr,
 686                                         char **endptr, int base);
 687 #endif
 688
 689 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
 690 /* Compare version strings.  */
 691 extern int strverscmp (const char *, const char *);
 692 #endif
 693
 694 /* Set the title of a process */
 695 extern void setproctitle (const char *name, ...);
 696
 697 /* Increase stack limit if possible.  */
 698 extern void stack_limit_increase (unsigned long);
 699
 700 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 701
 702 /* Drastically simplified alloca configurator.  If we're using GCC,
 703    we use __builtin_alloca; otherwise we use the C alloca.  The C
 704    alloca is always available.  You can override GCC by defining
 705    USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
 706    also set/unset as it is often used to indicate whether code needs
 707    to call alloca(0).  */
 708 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
 709 #undef alloca
 710 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
 711 # define alloca(x) __builtin_alloca(x)
 712 # undef C_ALLOCA
 713 # define ASTRDUP(X) \
 714   (__extension__ ({ const char *const libiberty_optr = (X); \
 715    const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
 716    char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
 717    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
 718 #else
 719 # define alloca(x) C_alloca(x)
 720 # undef USE_C_ALLOCA
 721 # define USE_C_ALLOCA 1
 722 # undef C_ALLOCA
 723 # define C_ALLOCA 1
 724 extern const char *libiberty_optr;
 725 extern char *libiberty_nptr;
 726 extern unsigned long libiberty_len;
 727 # define ASTRDUP(X) \
 728   (libiberty_optr = (X), \
 729    libiberty_len = strlen (libiberty_optr) + 1, \
 730    libiberty_nptr = (char *) alloca (libiberty_len), \
 731    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
 732 #endif
 733
 734 #ifdef __cplusplus
 735 }
 736 #endif
 737
 738
 739 #endif /* ! defined (LIBIBERTY_H) */