include/libiberty.h

   1 /* Function declarations for libiberty.
   2
   3    Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   4    2006, 2007, 2008, 2009, 2010, 2011, 2013 Free Software Foundation, Inc.
   5
   6    Note - certain prototypes declared in this header file are for
   7    functions whoes implementation copyright does not belong to the
   8    FSF.  Those prototypes are present in this file for reference
   9    purposes only and their presence in this file should not construed
  10    as an indication of ownership by the FSF of the implementation of
  11    those functions in any way or form whatsoever.
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2, or (at your option)
  16    any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 51 Franklin Street - Fifth Floor,
  26    Boston, MA 02110-1301, USA.
  27
  28    Written by Cygnus Support, 1994.
  29
  30    The libiberty library provides a number of functions which are
  31    missing on some operating systems.  We do not declare those here,
  32    to avoid conflicts with the system header files on operating
  33    systems that do support those functions.  In this file we only
  34    declare those functions which are specific to libiberty.  */
  35
  36 #ifndef LIBIBERTY_H
  37 #define LIBIBERTY_H
  38
  39 #ifdef __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 #include "ansidecl.h"
  44
  45 /* Get a definition for size_t.  */
  46 #include <stddef.h>
  47 /* Get a definition for va_list.  */
  48 #include <stdarg.h>
  49
  50 #include <stdio.h>
  51
  52 /* If the OS supports it, ensure that the supplied stream is setup to
  53    avoid any multi-threaded locking.  Otherwise leave the FILE pointer
  54    unchanged.  If the stream is NULL do nothing.  */
  55
  56 extern void unlock_stream (FILE *);
  57
  58 /* If the OS supports it, ensure that the standard I/O streams, stdin,
  59    stdout and stderr are setup to avoid any multi-threaded locking.
  60    Otherwise do nothing.  */
  61
  62 extern void unlock_std_streams (void);
  63
  64 /* Open and return a FILE pointer.  If the OS supports it, ensure that
  65    the stream is setup to avoid any multi-threaded locking.  Otherwise
  66    return the FILE pointer unchanged.  */
  67
  68 extern FILE *fopen_unlocked (const char *, const char *);
  69 extern FILE *fdopen_unlocked (int, const char *);
  70 extern FILE *freopen_unlocked (const char *, const char *, FILE *);
  71
  72 /* Build an argument vector from a string.  Allocates memory using
  73    malloc.  Use freeargv to free the vector.  */
  74
  75 extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
  76
  77 /* Free a vector returned by buildargv.  */
  78
  79 extern void freeargv (char **);
  80
  81 /* Duplicate an argument vector. Allocates memory using malloc.  Use
  82    freeargv to free the vector.  */
  83
  84 extern char **dupargv (char **) ATTRIBUTE_MALLOC;
  85
  86 /* Expand "@file" arguments in argv.  */
  87
  88 extern void expandargv (int *, char ***);
  89
  90 /* Write argv to an @-file, inserting necessary quoting.  */
  91
  92 extern int writeargv (char **, FILE *);
  93
  94 /* Return the number of elements in argv.  */
  95
  96 extern int countargv (char**);
  97
  98 /* Return the last component of a path name.  Note that we can't use a
  99    prototype here because the parameter is declared inconsistently
 100    across different systems, sometimes as "char *" and sometimes as
 101    "const char *" */
 102
 103 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1.  If it is
 104    undefined, we haven't run the autoconf check so provide the
 105    declaration without arguments.  If it is 0, we checked and failed
 106    to find the declaration so provide a fully prototyped one.  If it
 107    is 1, we found it so don't provide any declaration at all.  */
 108 #if !HAVE_DECL_BASENAME
 109 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) \
 110  || defined (__FreeBSD__) || defined (__OpenBSD__) || defined (__NetBSD__) \
 111  || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) \
 112  || defined (__DragonFly__) || defined (HAVE_DECL_BASENAME)
 113 extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 114 #else
 115 /* Do not allow basename to be used if there is no prototype seen.  We
 116    either need to use the above prototype or have one from
 117    autoconf which would result in HAVE_DECL_BASENAME being set.  */
 118 #define basename basename_cannot_be_used_without_a_prototype
 119 #endif
 120 #endif
 121
 122 /* A well-defined basename () that is always compiled in.  */
 123
 124 extern const char *lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 125
 126 /* Same, but assumes DOS semantics (drive name, backslash is also a
 127    dir separator) regardless of host.  */
 128
 129 extern const char *dos_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 130
 131 /* Same, but assumes Unix semantics (absolute paths always start with
 132    a slash, only forward slash is accepted as dir separator)
 133    regardless of host.  */
 134
 135 extern const char *unix_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
 136
 137 /* A well-defined realpath () that is always compiled in.  */
 138
 139 extern char *lrealpath (const char *);
 140
 141 /* Concatenate an arbitrary number of strings.  You must pass NULL as
 142    the last argument of this function, to terminate the list of
 143    strings.  Allocates memory using xmalloc.  */
 144
 145 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
 146
 147 /* Concatenate an arbitrary number of strings.  You must pass NULL as
 148    the last argument of this function, to terminate the list of
 149    strings.  Allocates memory using xmalloc.  The first argument is
 150    not one of the strings to be concatenated, but if not NULL is a
 151    pointer to be freed after the new string is created, similar to the
 152    way xrealloc works.  */
 153
 154 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
 155
 156 /* Determine the length of concatenating an arbitrary number of
 157    strings.  You must pass NULL as the last argument of this function,
 158    to terminate the list of strings.  */
 159
 160 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
 161
 162 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
 163    memory.  You must pass NULL as the last argument of this function,
 164    to terminate the list of strings.  The supplied memory is assumed
 165    to be large enough.  */
 166
 167 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;
 168
 169 /* Concatenate an arbitrary number of strings into a GLOBAL area of
 170    memory.  You must pass NULL as the last argument of this function,
 171    to terminate the list of strings.  The supplied memory is assumed
 172    to be large enough.  */
 173
 174 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
 175
 176 /* This is the global area used by concat_copy2.  */
 177
 178 extern char *libiberty_concat_ptr;
 179
 180 /* Concatenate an arbitrary number of strings.  You must pass NULL as
 181    the last argument of this function, to terminate the list of
 182    strings.  Allocates memory using alloca.  The arguments are
 183    evaluated twice!  */
 184 #define ACONCAT(ACONCAT_PARAMS) \
 185   (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
 186    concat_copy2 ACONCAT_PARAMS)
 187
 188 /* Check whether two file descriptors refer to the same file.  */
 189
 190 extern int fdmatch (int fd1, int fd2);
 191
 192 /* Return the position of the first bit set in the argument.  */
 193 /* Prototypes vary from system to system, so we only provide a
 194    prototype on systems where we know that we need it.  */
 195 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
 196 extern int ffs(int);
 197 #endif
 198
 199 /* Get the working directory.  The result is cached, so don't call
 200    chdir() between calls to getpwd().  */
 201
 202 extern char * getpwd (void);
 203
 204 /* Get the current time.  */
 205 /* Prototypes vary from system to system, so we only provide a
 206    prototype on systems where we know that we need it.  */
 207 #ifdef __MINGW32__
 208 /* Forward declaration to avoid #include <sys/time.h>.   */
 209 struct timeval;
 210 extern int gettimeofday (struct timeval *, void *);
 211 #endif
 212
 213 /* Get the amount of time the process has run, in microseconds.  */
 214
 215 extern long get_run_time (void);
 216
 217 /* Generate a relocated path to some installation directory.  Allocates
 218    return value using malloc.  */
 219
 220 extern char *make_relative_prefix (const char *, const char *,
 221                                    const char *) ATTRIBUTE_MALLOC;
 222
 223 /* Generate a relocated path to some installation directory without
 224    attempting to follow any soft links.  Allocates
 225    return value using malloc.  */
 226
 227 extern char *make_relative_prefix_ignore_links (const char *, const char *,
 228                                                 const char *) ATTRIBUTE_MALLOC;
 229
 230 /* Returns a pointer to a directory path suitable for creating temporary
 231    files in.  */
 232
 233 extern const char *choose_tmpdir (void) ATTRIBUTE_RETURNS_NONNULL;
 234
 235 /* Choose a temporary directory to use for scratch files.  */
 236
 237 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 238
 239 /* Return a temporary file name or NULL if unable to create one.  */
 240
 241 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
 242
 243 /* Remove a link to a file unless it is special. */
 244
 245 extern int unlink_if_ordinary (const char *);
 246
 247 /* Allocate memory filled with spaces.  Allocates using malloc.  */
 248
 249 extern const char *spaces (int count);
 250
 251 /* Return the maximum error number for which strerror will return a
 252    string.  */
 253
 254 extern int errno_max (void);
 255
 256 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
 257    "EINVAL").  */
 258
 259 extern const char *strerrno (int);
 260
 261 /* Given the name of an errno value, return the value.  */
 262
 263 extern int strtoerrno (const char *);
 264
 265 /* ANSI's strerror(), but more robust.  */
 266
 267 extern char *xstrerror (int) ATTRIBUTE_RETURNS_NONNULL;
 268
 269 /* Return the maximum signal number for which strsignal will return a
 270    string.  */
 271
 272 extern int signo_max (void);
 273
 274 /* Return a signal message string for a signal number
 275    (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
 276 /* This is commented out as it can conflict with one in system headers.
 277    We still document its existence though.  */
 278
 279 /*extern const char *strsignal (int);*/
 280
 281 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
 282    "SIGHUP").  */
 283
 284 extern const char *strsigno (int);
 285
 286 /* Given the name of a signal, return its number.  */
 287
 288 extern int strtosigno (const char *);
 289
 290 /* Register a function to be run by xexit.  Returns 0 on success.  */
 291
 292 extern int xatexit (void (*fn) (void));
 293
 294 /* Exit, calling all the functions registered with xatexit.  */
 295
 296 extern void xexit (int status) ATTRIBUTE_NORETURN;
 297
 298 /* Set the program name used by xmalloc.  */
 299
 300 extern void xmalloc_set_program_name (const char *);
 301
 302 /* Report an allocation failure.  */
 303 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
 304
 305 /* Allocate memory without fail.  If malloc fails, this will print a
 306    message to stderr (using the name set by xmalloc_set_program_name,
 307    if any) and then call xexit.  */
 308
 309 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 310
 311 /* Reallocate memory without fail.  This works like xmalloc.  Note,
 312    realloc type functions are not suitable for attribute malloc since
 313    they may return the same address across multiple calls. */
 314
 315 extern void *xrealloc (void *, size_t) ATTRIBUTE_RETURNS_NONNULL;
 316
 317 /* Allocate memory without fail and set it to zero.  This works like
 318    xmalloc.  */
 319
 320 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 321
 322 /* Copy a string into a memory buffer without fail.  */
 323
 324 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 325
 326 /* Copy at most N characters from string into a buffer without fail.  */
 327
 328 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 329
 330 /* Copy an existing memory buffer to a new memory buffer without fail.  */
 331
 332 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
 333
 334 /* Physical memory routines.  Return values are in BYTES.  */
 335 extern double physmem_total (void);
 336 extern double physmem_available (void);
 337
 338 /* Compute the 32-bit CRC of a block of memory.  */
 339 extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
 340
 341 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
 342    with nice encapsulation.  The XDELETE*() macros are technically
 343    superfluous, but provided here for symmetry.  Using them consistently
 344    makes it easier to update client code to use different allocators such
 345    as new/delete and new[]/delete[].  */
 346
 347 /* Scalar allocators.  */
 348
 349 #define XALLOCA(T)              ((T *) alloca (sizeof (T)))
 350 #define XNEW(T)                 ((T *) xmalloc (sizeof (T)))
 351 #define XCNEW(T)                ((T *) xcalloc (1, sizeof (T)))
 352 #define XDUP(T, P)              ((T *) xmemdup ((P), sizeof (T), sizeof (T)))
 353 #define XDELETE(P)              free ((void*) (P))
 354
 355 /* Array allocators.  */
 356
 357 #define XALLOCAVEC(T, N)        ((T *) alloca (sizeof (T) * (N)))
 358 #define XNEWVEC(T, N)           ((T *) xmalloc (sizeof (T) * (N)))
 359 #define XCNEWVEC(T, N)          ((T *) xcalloc ((N), sizeof (T)))
 360 #define XDUPVEC(T, P, N)        ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N)))
 361 #define XRESIZEVEC(T, P, N)     ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
 362 #define XDELETEVEC(P)           free ((void*) (P))
 363
 364 /* Allocators for variable-sized structures and raw buffers.  */
 365
 366 #define XALLOCAVAR(T, S)        ((T *) alloca ((S)))
 367 #define XNEWVAR(T, S)           ((T *) xmalloc ((S)))
 368 #define XCNEWVAR(T, S)          ((T *) xcalloc (1, (S)))
 369 #define XDUPVAR(T, P, S1, S2)   ((T *) xmemdup ((P), (S1), (S2)))
 370 #define XRESIZEVAR(T, P, S)     ((T *) xrealloc ((P), (S)))
 371
 372 /* Type-safe obstack allocator.  */
 373
 374 #define XOBNEW(O, T)            ((T *) obstack_alloc ((O), sizeof (T)))
 375 #define XOBNEWVEC(O, T, N)      ((T *) obstack_alloc ((O), sizeof (T) * (N)))
 376 #define XOBNEWVAR(O, T, S)      ((T *) obstack_alloc ((O), (S)))
 377 #define XOBFINISH(O, T)         ((T) obstack_finish ((O)))
 378
 379 /* hex character manipulation routines */
 380
 381 #define _hex_array_size 256
 382 #define _hex_bad        99
 383 extern const unsigned char _hex_value[_hex_array_size];
 384 extern void hex_init (void);
 385 #define hex_p(c)        (hex_value (c) != _hex_bad)
 386 /* If you change this, note well: Some code relies on side effects in
 387    the argument being performed exactly once.  */
 388 #define hex_value(c)    ((unsigned int) _hex_value[(unsigned char) (c)])
 389
 390 /* Flags for pex_init.  These are bits to be or'ed together.  */
 391
 392 /* Record subprocess times, if possible.  */
 393 #define PEX_RECORD_TIMES        0x1
 394
 395 /* Use pipes for communication between processes, if possible.  */
 396 #define PEX_USE_PIPES           0x2
 397
 398 /* Save files used for communication between processes.  */
 399 #define PEX_SAVE_TEMPS          0x4
 400
 401 /* Prepare to execute one or more programs, with standard output of
 402    each program fed to standard input of the next.
 403    FLAGS        As above.
 404    PNAME        The name of the program to report in error messages.
 405    TEMPBASE     A base name to use for temporary files; may be NULL to
 406                 use a random name.
 407    Returns NULL on error.  */
 408
 409 extern struct pex_obj *pex_init (int flags, const char *pname,
 410                                  const char *tempbase) ATTRIBUTE_RETURNS_NONNULL;
 411
 412 /* Flags for pex_run.  These are bits to be or'ed together.  */
 413
 414 /* Last program in pipeline.  Standard output of program goes to
 415    OUTNAME, or, if OUTNAME is NULL, to standard output of caller.  Do
 416    not set this if you want to call pex_read_output.  After this is
 417    set, pex_run may no longer be called with the same struct
 418    pex_obj.  */
 419 #define PEX_LAST                0x1
 420
 421 /* Search for program in executable search path.  */
 422 #define PEX_SEARCH              0x2
 423
 424 /* OUTNAME is a suffix.  */
 425 #define PEX_SUFFIX              0x4
 426
 427 /* Send program's standard error to standard output.  */
 428 #define PEX_STDERR_TO_STDOUT    0x8
 429
 430 /* Input file should be opened in binary mode.  This flag is ignored
 431    on Unix.  */
 432 #define PEX_BINARY_INPUT        0x10
 433
 434 /* Output file should be opened in binary mode.  This flag is ignored
 435    on Unix.  For proper behaviour PEX_BINARY_INPUT and
 436    PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
 437    PEX_BINARY_OUTPUT should be followed by a call using
 438    PEX_BINARY_INPUT.  */
 439 #define PEX_BINARY_OUTPUT       0x20
 440
 441 /* Capture stderr to a pipe.  The output can be read by
 442    calling pex_read_err and reading from the returned
 443    FILE object.  This flag may be specified only for
 444    the last program in a pipeline.
 445
 446    This flag is supported only on Unix and Windows.  */
 447 #define PEX_STDERR_TO_PIPE      0x40
 448
 449 /* Capture stderr in binary mode.  This flag is ignored
 450    on Unix.  */
 451 #define PEX_BINARY_ERROR        0x80
 452
 453 /* Append stdout to existing file instead of truncating it.  */
 454 #define PEX_STDOUT_APPEND       0x100
 455
 456 /* Thes same as PEX_STDOUT_APPEND, but for STDERR.  */
 457 #define PEX_STDERR_APPEND       0x200
 458
 459 /* Execute one program.  Returns NULL on success.  On error returns an
 460    error string (typically just the name of a system call); the error
 461    string is statically allocated.
 462
 463    OBJ          Returned by pex_init.
 464
 465    FLAGS        As above.
 466
 467    EXECUTABLE   The program to execute.
 468
 469    ARGV         NULL terminated array of arguments to pass to the program.
 470
 471    OUTNAME      Sets the output file name as follows:
 472
 473                 PEX_SUFFIX set (OUTNAME may not be NULL):
 474                   TEMPBASE parameter to pex_init not NULL:
 475                     Output file name is the concatenation of TEMPBASE
 476                     and OUTNAME.
 477                   TEMPBASE is NULL:
 478                     Output file name is a random file name ending in
 479                     OUTNAME.
 480                 PEX_SUFFIX not set:
 481                   OUTNAME not NULL:
 482                     Output file name is OUTNAME.
 483                   OUTNAME NULL, TEMPBASE not NULL:
 484                     Output file name is randomly chosen using
 485                     TEMPBASE.
 486                   OUTNAME NULL, TEMPBASE NULL:
 487                     Output file name is randomly chosen.
 488
 489                 If PEX_LAST is not set, the output file name is the
 490                 name to use for a temporary file holding stdout, if
 491                 any (there will not be a file if PEX_USE_PIPES is set
 492                 and the system supports pipes).  If a file is used, it
 493                 will be removed when no longer needed unless
 494                 PEX_SAVE_TEMPS is set.
 495
 496                 If PEX_LAST is set, and OUTNAME is not NULL, standard
 497                 output is written to the output file name.  The file
 498                 will not be removed.  If PEX_LAST and PEX_SUFFIX are
 499                 both set, TEMPBASE may not be NULL.
 500
 501    ERRNAME      If not NULL, this is the name of a file to which
 502                 standard error is written.  If NULL, standard error of
 503                 the program is standard error of the caller.
 504
 505    ERR          On an error return, *ERR is set to an errno value, or
 506                 to 0 if there is no relevant errno.
 507 */
 508
 509 extern const char *pex_run (struct pex_obj *obj, int flags,
 510                             const char *executable, char * const *argv,
 511                             const char *outname, const char *errname,
 512                             int *err);
 513
 514 /* As for pex_run (), but takes an extra parameter to enable the
 515    environment for the child process to be specified.
 516
 517    ENV          The environment for the child process, specified as
 518                 an array of character pointers.  Each element of the
 519                 array should point to a string of the form VAR=VALUE,
 520                 with the exception of the last element which must be
 521                 a null pointer.
 522 */
 523
 524 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
 525                                            const char *executable,
 526                                            char * const *argv,
 527                                            char * const *env,
 528                                            const char *outname,
 529                                            const char *errname, int *err);
 530
 531 /* Return a stream for a temporary file to pass to the first program
 532    in the pipeline as input.  The file name is chosen as for pex_run.
 533    pex_run closes the file automatically; don't close it yourself.  */
 534
 535 extern FILE *pex_input_file (struct pex_obj *obj, int flags,
 536                              const char *in_name);
 537
 538 /* Return a stream for a pipe connected to the standard input of the
 539    first program in the pipeline.  You must have passed
 540    `PEX_USE_PIPES' to `pex_init'.  Close the returned stream
 541    yourself.  */
 542
 543 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
 544
 545 /* Read the standard output of the last program to be executed.
 546    pex_run can not be called after this.  BINARY should be non-zero if
 547    the file should be opened in binary mode; this is ignored on Unix.
 548    Returns NULL on error.  Don't call fclose on the returned FILE; it
 549    will be closed by pex_free.  */
 550
 551 extern FILE *pex_read_output (struct pex_obj *, int binary);
 552
 553 /* Read the standard error of the last program to be executed.
 554    pex_run can not be called after this.  BINARY should be non-zero if
 555    the file should be opened in binary mode; this is ignored on Unix.
 556    Returns NULL on error.  Don't call fclose on the returned FILE; it
 557    will be closed by pex_free.  */
 558
 559 extern FILE *pex_read_err (struct pex_obj *, int binary);
 560
 561 /* Return exit status of all programs in VECTOR.  COUNT indicates the
 562    size of VECTOR.  The status codes in the vector are in the order of
 563    the calls to pex_run.  Returns 0 on error, 1 on success.  */
 564
 565 extern int pex_get_status (struct pex_obj *, int count, int *vector);
 566
 567 /* Return times of all programs in VECTOR.  COUNT indicates the size
 568    of VECTOR.  struct pex_time is really just struct timeval, but that
 569    is not portable to all systems.  Returns 0 on error, 1 on
 570    success.  */
 571
 572 struct pex_time
 573 {
 574   unsigned long user_seconds;
 575   unsigned long user_microseconds;
 576   unsigned long system_seconds;
 577   unsigned long system_microseconds;
 578 };
 579
 580 extern int pex_get_times (struct pex_obj *, int count,
 581                           struct pex_time *vector);
 582
 583 /* Clean up a pex_obj.  If you have not called pex_get_times or
 584    pex_get_status, this will try to kill the subprocesses.  */
 585
 586 extern void pex_free (struct pex_obj *);
 587
 588 /* Just execute one program.  Return value is as for pex_run.
 589    FLAGS        Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
 590    EXECUTABLE   As for pex_run.
 591    ARGV         As for pex_run.
 592    PNAME        As for pex_init.
 593    OUTNAME      As for pex_run when PEX_LAST is set.
 594    ERRNAME      As for pex_run.
 595    STATUS       Set to exit status on success.
 596    ERR          As for pex_run.
 597 */
 598
 599 extern const char *pex_one (int flags, const char *executable,
 600                             char * const *argv, const char *pname,
 601                             const char *outname, const char *errname,
 602                             int *status, int *err);
 603
 604 /* pexecute and pwait are the old pexecute interface, still here for
 605    backward compatibility.  Don't use these for new code.  Instead,
 606    use pex_init/pex_run/pex_get_status/pex_free, or pex_one.  */
 607
 608 /* Definitions used by the pexecute routine.  */
 609
 610 #define PEXECUTE_FIRST   1
 611 #define PEXECUTE_LAST    2
 612 #define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
 613 #define PEXECUTE_SEARCH  4
 614 #define PEXECUTE_VERBOSE 8
 615
 616 /* Execute a program.  */
 617
 618 extern int pexecute (const char *, char * const *, const char *,
 619                      const char *, char **, char **, int);
 620
 621 /* Wait for pexecute to finish.  */
 622
 623 extern int pwait (int, int *, int);
 624
 625 #if !HAVE_DECL_ASPRINTF
 626 /* Like sprintf but provides a pointer to malloc'd storage, which must
 627    be freed by the caller.  */
 628
 629 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
 630 #endif
 631
 632 #if !HAVE_DECL_VASPRINTF
 633 /* Like vsprintf but provides a pointer to malloc'd storage, which
 634    must be freed by the caller.  */
 635
 636 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
 637 #endif
 638
 639 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 640 /* Like sprintf but prints at most N characters.  */
 641 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
 642 #endif
 643
 644 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 645 /* Like vsprintf but prints at most N characters.  */
 646 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
 647 #endif
 648
 649 #if defined (HAVE_DECL_STRNLEN) && !HAVE_DECL_STRNLEN
 650 extern size_t strnlen (const char *, size_t);
 651 #endif
 652
 653 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
 654 /* Compare version strings.  */
 655 extern int strverscmp (const char *, const char *);
 656 #endif
 657
 658 /* Set the title of a process */
 659 extern void setproctitle (const char *name, ...);
 660
 661 /* Increase stack limit if possible.  */
 662 extern void stack_limit_increase (unsigned long);
 663
 664 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 665
 666 /* Drastically simplified alloca configurator.  If we're using GCC,
 667    we use __builtin_alloca; otherwise we use the C alloca.  The C
 668    alloca is always available.  You can override GCC by defining
 669    USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
 670    also set/unset as it is often used to indicate whether code needs
 671    to call alloca(0).  */
 672 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
 673 #undef alloca
 674 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
 675 # define alloca(x) __builtin_alloca(x)
 676 # undef C_ALLOCA
 677 # define ASTRDUP(X) \
 678   (__extension__ ({ const char *const libiberty_optr = (X); \
 679    const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
 680    char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
 681    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
 682 #else
 683 # define alloca(x) C_alloca(x)
 684 # undef USE_C_ALLOCA
 685 # define USE_C_ALLOCA 1
 686 # undef C_ALLOCA
 687 # define C_ALLOCA 1
 688 extern const char *libiberty_optr;
 689 extern char *libiberty_nptr;
 690 extern unsigned long libiberty_len;
 691 # define ASTRDUP(X) \
 692   (libiberty_optr = (X), \
 693    libiberty_len = strlen (libiberty_optr) + 1, \
 694    libiberty_nptr = (char *) alloca (libiberty_len), \
 695    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
 696 #endif
 697
 698 #ifdef __cplusplus
 699 }
 700 #endif
 701
 702
 703 #endif /* ! defined (LIBIBERTY_H) */