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1 726 jeremybenn
/* Function declarations for libiberty.
2
 
3
   Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4
   2006, 2007, 2008, 2009, 2010, 2011 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 PARAMS ((int *, char ***));
89
 
90
/* Write argv to an @-file, inserting necessary quoting.  */
91
 
92
extern int writeargv PARAMS ((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__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME)
110
extern char *basename (const char *);
111
#else
112
/* Do not allow basename to be used if there is no prototype seen.  We
113
   either need to use the above prototype or have one from
114
   autoconf which would result in HAVE_DECL_BASENAME being set.  */
115
#define basename basename_cannot_be_used_without_a_prototype
116
#endif
117
#endif
118
 
119
/* A well-defined basename () that is always compiled in.  */
120
 
121
extern const char *lbasename (const char *);
122
 
123
/* Same, but assumes DOS semantics (drive name, backslash is also a
124
   dir separator) regardless of host.  */
125
 
126
extern const char *dos_lbasename (const char *);
127
 
128
/* Same, but assumes Unix semantics (absolute paths always start with
129
   a slash, only forward slash is accepted as dir separator)
130
   regardless of host.  */
131
 
132
extern const char *unix_lbasename (const char *);
133
 
134
/* A well-defined realpath () that is always compiled in.  */
135
 
136
extern char *lrealpath (const char *);
137
 
138
/* Concatenate an arbitrary number of strings.  You must pass NULL as
139
   the last argument of this function, to terminate the list of
140
   strings.  Allocates memory using xmalloc.  */
141
 
142
extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
143
 
144
/* Concatenate an arbitrary number of strings.  You must pass NULL as
145
   the last argument of this function, to terminate the list of
146
   strings.  Allocates memory using xmalloc.  The first argument is
147
   not one of the strings to be concatenated, but if not NULL is a
148
   pointer to be freed after the new string is created, similar to the
149
   way xrealloc works.  */
150
 
151
extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
152
 
153
/* Determine the length of concatenating an arbitrary number of
154
   strings.  You must pass NULL as the last argument of this function,
155
   to terminate the list of strings.  */
156
 
157
extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
158
 
159
/* Concatenate an arbitrary number of strings into a SUPPLIED area of
160
   memory.  You must pass NULL as the last argument of this function,
161
   to terminate the list of strings.  The supplied memory is assumed
162
   to be large enough.  */
163
 
164
extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL;
165
 
166
/* Concatenate an arbitrary number of strings into a GLOBAL area of
167
   memory.  You must pass NULL as the last argument of this function,
168
   to terminate the list of strings.  The supplied memory is assumed
169
   to be large enough.  */
170
 
171
extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL;
172
 
173
/* This is the global area used by concat_copy2.  */
174
 
175
extern char *libiberty_concat_ptr;
176
 
177
/* Concatenate an arbitrary number of strings.  You must pass NULL as
178
   the last argument of this function, to terminate the list of
179
   strings.  Allocates memory using alloca.  The arguments are
180
   evaluated twice!  */
181
#define ACONCAT(ACONCAT_PARAMS) \
182
  (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
183
   concat_copy2 ACONCAT_PARAMS)
184
 
185
/* Check whether two file descriptors refer to the same file.  */
186
 
187
extern int fdmatch (int fd1, int fd2);
188
 
189
/* Return the position of the first bit set in the argument.  */
190
/* Prototypes vary from system to system, so we only provide a
191
   prototype on systems where we know that we need it.  */
192
#if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
193
extern int ffs(int);
194
#endif
195
 
196
/* Get the working directory.  The result is cached, so don't call
197
   chdir() between calls to getpwd().  */
198
 
199
extern char * getpwd (void);
200
 
201
/* Get the current time.  */
202
/* Prototypes vary from system to system, so we only provide a
203
   prototype on systems where we know that we need it.  */
204
#ifdef __MINGW32__
205
/* Forward declaration to avoid #include <sys/time.h>.   */
206
struct timeval;
207
extern int gettimeofday (struct timeval *, void *);
208
#endif
209
 
210
/* Get the amount of time the process has run, in microseconds.  */
211
 
212
extern long get_run_time (void);
213
 
214
/* Generate a relocated path to some installation directory.  Allocates
215
   return value using malloc.  */
216
 
217
extern char *make_relative_prefix (const char *, const char *,
218
                                   const char *) ATTRIBUTE_MALLOC;
219
 
220
/* Generate a relocated path to some installation directory without
221
   attempting to follow any soft links.  Allocates
222
   return value using malloc.  */
223
 
224
extern char *make_relative_prefix_ignore_links (const char *, const char *,
225
                                                const char *) ATTRIBUTE_MALLOC;
226
 
227
/* Choose a temporary directory to use for scratch files.  */
228
 
229
extern char *choose_temp_base (void) ATTRIBUTE_MALLOC;
230
 
231
/* Return a temporary file name or NULL if unable to create one.  */
232
 
233
extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
234
 
235
/* Remove a link to a file unless it is special. */
236
 
237
extern int unlink_if_ordinary (const char *);
238
 
239
/* Allocate memory filled with spaces.  Allocates using malloc.  */
240
 
241
extern const char *spaces (int count);
242
 
243
/* Return the maximum error number for which strerror will return a
244
   string.  */
245
 
246
extern int errno_max (void);
247
 
248
/* Return the name of an errno value (e.g., strerrno (EINVAL) returns
249
   "EINVAL").  */
250
 
251
extern const char *strerrno (int);
252
 
253
/* Given the name of an errno value, return the value.  */
254
 
255
extern int strtoerrno (const char *);
256
 
257
/* ANSI's strerror(), but more robust.  */
258
 
259
extern char *xstrerror (int);
260
 
261
/* Return the maximum signal number for which strsignal will return a
262
   string.  */
263
 
264
extern int signo_max (void);
265
 
266
/* Return a signal message string for a signal number
267
   (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
268
/* This is commented out as it can conflict with one in system headers.
269
   We still document its existence though.  */
270
 
271
/*extern const char *strsignal (int);*/
272
 
273
/* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
274
   "SIGHUP").  */
275
 
276
extern const char *strsigno (int);
277
 
278
/* Given the name of a signal, return its number.  */
279
 
280
extern int strtosigno (const char *);
281
 
282
/* Register a function to be run by xexit.  Returns 0 on success.  */
283
 
284
extern int xatexit (void (*fn) (void));
285
 
286
/* Exit, calling all the functions registered with xatexit.  */
287
 
288
extern void xexit (int status) ATTRIBUTE_NORETURN;
289
 
290
/* Set the program name used by xmalloc.  */
291
 
292
extern void xmalloc_set_program_name (const char *);
293
 
294
/* Report an allocation failure.  */
295
extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
296
 
297
/* Allocate memory without fail.  If malloc fails, this will print a
298
   message to stderr (using the name set by xmalloc_set_program_name,
299
   if any) and then call xexit.  */
300
 
301
extern void *xmalloc (size_t) ATTRIBUTE_MALLOC;
302
 
303
/* Reallocate memory without fail.  This works like xmalloc.  Note,
304
   realloc type functions are not suitable for attribute malloc since
305
   they may return the same address across multiple calls. */
306
 
307
extern void *xrealloc (void *, size_t);
308
 
309
/* Allocate memory without fail and set it to zero.  This works like
310
   xmalloc.  */
311
 
312
extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
313
 
314
/* Copy a string into a memory buffer without fail.  */
315
 
316
extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
317
 
318
/* Copy at most N characters from string into a buffer without fail.  */
319
 
320
extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
321
 
322
/* Copy an existing memory buffer to a new memory buffer without fail.  */
323
 
324
extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC;
325
 
326
/* Physical memory routines.  Return values are in BYTES.  */
327
extern double physmem_total (void);
328
extern double physmem_available (void);
329
 
330
/* Compute the 32-bit CRC of a block of memory.  */
331
extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
332
 
333
/* These macros provide a K&R/C89/C++-friendly way of allocating structures
334
   with nice encapsulation.  The XDELETE*() macros are technically
335
   superfluous, but provided here for symmetry.  Using them consistently
336
   makes it easier to update client code to use different allocators such
337
   as new/delete and new[]/delete[].  */
338
 
339
/* Scalar allocators.  */
340
 
341
#define XALLOCA(T)              ((T *) alloca (sizeof (T)))
342
#define XNEW(T)                 ((T *) xmalloc (sizeof (T)))
343
#define XCNEW(T)                ((T *) xcalloc (1, sizeof (T)))
344
#define XDUP(T, P)              ((T *) xmemdup ((P), sizeof (T), sizeof (T)))
345
#define XDELETE(P)              free ((void*) (P))
346
 
347
/* Array allocators.  */
348
 
349
#define XALLOCAVEC(T, N)        ((T *) alloca (sizeof (T) * (N)))
350
#define XNEWVEC(T, N)           ((T *) xmalloc (sizeof (T) * (N)))
351
#define XCNEWVEC(T, N)          ((T *) xcalloc ((N), sizeof (T)))
352
#define XDUPVEC(T, P, N)        ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N)))
353
#define XRESIZEVEC(T, P, N)     ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
354
#define XDELETEVEC(P)           free ((void*) (P))
355
 
356
/* Allocators for variable-sized structures and raw buffers.  */
357
 
358
#define XALLOCAVAR(T, S)        ((T *) alloca ((S)))
359
#define XNEWVAR(T, S)           ((T *) xmalloc ((S)))
360
#define XCNEWVAR(T, S)          ((T *) xcalloc (1, (S)))
361
#define XDUPVAR(T, P, S1, S2)   ((T *) xmemdup ((P), (S1), (S2)))
362
#define XRESIZEVAR(T, P, S)     ((T *) xrealloc ((P), (S)))
363
 
364
/* Type-safe obstack allocator.  */
365
 
366
#define XOBNEW(O, T)            ((T *) obstack_alloc ((O), sizeof (T)))
367
#define XOBNEWVEC(O, T, N)      ((T *) obstack_alloc ((O), sizeof (T) * (N)))
368
#define XOBNEWVAR(O, T, S)      ((T *) obstack_alloc ((O), (S)))
369
#define XOBFINISH(O, T)         ((T) obstack_finish ((O)))
370
 
371
/* hex character manipulation routines */
372
 
373
#define _hex_array_size 256
374
#define _hex_bad        99
375
extern const unsigned char _hex_value[_hex_array_size];
376
extern void hex_init (void);
377
#define hex_p(c)        (hex_value (c) != _hex_bad)
378
/* If you change this, note well: Some code relies on side effects in
379
   the argument being performed exactly once.  */
380
#define hex_value(c)    ((unsigned int) _hex_value[(unsigned char) (c)])
381
 
382
/* Flags for pex_init.  These are bits to be or'ed together.  */
383
 
384
/* Record subprocess times, if possible.  */
385
#define PEX_RECORD_TIMES        0x1
386
 
387
/* Use pipes for communication between processes, if possible.  */
388
#define PEX_USE_PIPES           0x2
389
 
390
/* Save files used for communication between processes.  */
391
#define PEX_SAVE_TEMPS          0x4
392
 
393
/* Prepare to execute one or more programs, with standard output of
394
   each program fed to standard input of the next.
395
   FLAGS        As above.
396
   PNAME        The name of the program to report in error messages.
397
   TEMPBASE     A base name to use for temporary files; may be NULL to
398
                use a random name.
399
   Returns NULL on error.  */
400
 
401
extern struct pex_obj *pex_init (int flags, const char *pname,
402
                                 const char *tempbase);
403
 
404
/* Flags for pex_run.  These are bits to be or'ed together.  */
405
 
406
/* Last program in pipeline.  Standard output of program goes to
407
   OUTNAME, or, if OUTNAME is NULL, to standard output of caller.  Do
408
   not set this if you want to call pex_read_output.  After this is
409
   set, pex_run may no longer be called with the same struct
410
   pex_obj.  */
411
#define PEX_LAST                0x1
412
 
413
/* Search for program in executable search path.  */
414
#define PEX_SEARCH              0x2
415
 
416
/* OUTNAME is a suffix.  */
417
#define PEX_SUFFIX              0x4
418
 
419
/* Send program's standard error to standard output.  */
420
#define PEX_STDERR_TO_STDOUT    0x8
421
 
422
/* Input file should be opened in binary mode.  This flag is ignored
423
   on Unix.  */
424
#define PEX_BINARY_INPUT        0x10
425
 
426
/* Output file should be opened in binary mode.  This flag is ignored
427
   on Unix.  For proper behaviour PEX_BINARY_INPUT and
428
   PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
429
   PEX_BINARY_OUTPUT should be followed by a call using
430
   PEX_BINARY_INPUT.  */
431
#define PEX_BINARY_OUTPUT       0x20
432
 
433
/* Capture stderr to a pipe.  The output can be read by
434
   calling pex_read_err and reading from the returned
435
   FILE object.  This flag may be specified only for
436
   the last program in a pipeline.
437
 
438
   This flag is supported only on Unix and Windows.  */
439
#define PEX_STDERR_TO_PIPE      0x40
440
 
441
/* Capture stderr in binary mode.  This flag is ignored
442
   on Unix.  */
443
#define PEX_BINARY_ERROR        0x80
444
 
445
 
446
/* Execute one program.  Returns NULL on success.  On error returns an
447
   error string (typically just the name of a system call); the error
448
   string is statically allocated.
449
 
450
   OBJ          Returned by pex_init.
451
 
452
   FLAGS        As above.
453
 
454
   EXECUTABLE   The program to execute.
455
 
456
   ARGV         NULL terminated array of arguments to pass to the program.
457
 
458
   OUTNAME      Sets the output file name as follows:
459
 
460
                PEX_SUFFIX set (OUTNAME may not be NULL):
461
                  TEMPBASE parameter to pex_init not NULL:
462
                    Output file name is the concatenation of TEMPBASE
463
                    and OUTNAME.
464
                  TEMPBASE is NULL:
465
                    Output file name is a random file name ending in
466
                    OUTNAME.
467
                PEX_SUFFIX not set:
468
                  OUTNAME not NULL:
469
                    Output file name is OUTNAME.
470
                  OUTNAME NULL, TEMPBASE not NULL:
471
                    Output file name is randomly chosen using
472
                    TEMPBASE.
473
                  OUTNAME NULL, TEMPBASE NULL:
474
                    Output file name is randomly chosen.
475
 
476
                If PEX_LAST is not set, the output file name is the
477
                name to use for a temporary file holding stdout, if
478
                any (there will not be a file if PEX_USE_PIPES is set
479
                and the system supports pipes).  If a file is used, it
480
                will be removed when no longer needed unless
481
                PEX_SAVE_TEMPS is set.
482
 
483
                If PEX_LAST is set, and OUTNAME is not NULL, standard
484
                output is written to the output file name.  The file
485
                will not be removed.  If PEX_LAST and PEX_SUFFIX are
486
                both set, TEMPBASE may not be NULL.
487
 
488
   ERRNAME      If not NULL, this is the name of a file to which
489
                standard error is written.  If NULL, standard error of
490
                the program is standard error of the caller.
491
 
492
   ERR          On an error return, *ERR is set to an errno value, or
493
                to 0 if there is no relevant errno.
494
*/
495
 
496
extern const char *pex_run (struct pex_obj *obj, int flags,
497
                            const char *executable, char * const *argv,
498
                            const char *outname, const char *errname,
499
                            int *err);
500
 
501
/* As for pex_run (), but takes an extra parameter to enable the
502
   environment for the child process to be specified.
503
 
504
   ENV          The environment for the child process, specified as
505
                an array of character pointers.  Each element of the
506
                array should point to a string of the form VAR=VALUE,
507
                with the exception of the last element which must be
508
                a null pointer.
509
*/
510
 
511
extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
512
                                           const char *executable,
513
                                           char * const *argv,
514
                                           char * const *env,
515
                                           const char *outname,
516
                                           const char *errname, int *err);
517
 
518
/* Return a stream for a temporary file to pass to the first program
519
   in the pipeline as input.  The file name is chosen as for pex_run.
520
   pex_run closes the file automatically; don't close it yourself.  */
521
 
522
extern FILE *pex_input_file (struct pex_obj *obj, int flags,
523
                             const char *in_name);
524
 
525
/* Return a stream for a pipe connected to the standard input of the
526
   first program in the pipeline.  You must have passed
527
   `PEX_USE_PIPES' to `pex_init'.  Close the returned stream
528
   yourself.  */
529
 
530
extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
531
 
532
/* Read the standard output of the last program to be executed.
533
   pex_run can not be called after this.  BINARY should be non-zero if
534
   the file should be opened in binary mode; this is ignored on Unix.
535
   Returns NULL on error.  Don't call fclose on the returned FILE; it
536
   will be closed by pex_free.  */
537
 
538
extern FILE *pex_read_output (struct pex_obj *, int binary);
539
 
540
/* Read the standard error of the last program to be executed.
541
   pex_run can not be called after this.  BINARY should be non-zero if
542
   the file should be opened in binary mode; this is ignored on Unix.
543
   Returns NULL on error.  Don't call fclose on the returned FILE; it
544
   will be closed by pex_free.  */
545
 
546
extern FILE *pex_read_err (struct pex_obj *, int binary);
547
 
548
/* Return exit status of all programs in VECTOR.  COUNT indicates the
549
   size of VECTOR.  The status codes in the vector are in the order of
550
   the calls to pex_run.  Returns 0 on error, 1 on success.  */
551
 
552
extern int pex_get_status (struct pex_obj *, int count, int *vector);
553
 
554
/* Return times of all programs in VECTOR.  COUNT indicates the size
555
   of VECTOR.  struct pex_time is really just struct timeval, but that
556
   is not portable to all systems.  Returns 0 on error, 1 on
557
   success.  */
558
 
559
struct pex_time
560
{
561
  unsigned long user_seconds;
562
  unsigned long user_microseconds;
563
  unsigned long system_seconds;
564
  unsigned long system_microseconds;
565
};
566
 
567
extern int pex_get_times (struct pex_obj *, int count,
568
                          struct pex_time *vector);
569
 
570
/* Clean up a pex_obj.  If you have not called pex_get_times or
571
   pex_get_status, this will try to kill the subprocesses.  */
572
 
573
extern void pex_free (struct pex_obj *);
574
 
575
/* Just execute one program.  Return value is as for pex_run.
576
   FLAGS        Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
577
   EXECUTABLE   As for pex_run.
578
   ARGV         As for pex_run.
579
   PNAME        As for pex_init.
580
   OUTNAME      As for pex_run when PEX_LAST is set.
581
   ERRNAME      As for pex_run.
582
   STATUS       Set to exit status on success.
583
   ERR          As for pex_run.
584
*/
585
 
586
extern const char *pex_one (int flags, const char *executable,
587
                            char * const *argv, const char *pname,
588
                            const char *outname, const char *errname,
589
                            int *status, int *err);
590
 
591
/* pexecute and pwait are the old pexecute interface, still here for
592
   backward compatibility.  Don't use these for new code.  Instead,
593
   use pex_init/pex_run/pex_get_status/pex_free, or pex_one.  */
594
 
595
/* Definitions used by the pexecute routine.  */
596
 
597
#define PEXECUTE_FIRST   1
598
#define PEXECUTE_LAST    2
599
#define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
600
#define PEXECUTE_SEARCH  4
601
#define PEXECUTE_VERBOSE 8
602
 
603
/* Execute a program.  */
604
 
605
extern int pexecute (const char *, char * const *, const char *,
606
                     const char *, char **, char **, int);
607
 
608
/* Wait for pexecute to finish.  */
609
 
610
extern int pwait (int, int *, int);
611
 
612
#if !HAVE_DECL_ASPRINTF
613
/* Like sprintf but provides a pointer to malloc'd storage, which must
614
   be freed by the caller.  */
615
 
616
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
617
#endif
618
 
619
#if !HAVE_DECL_VASPRINTF
620
/* Like vsprintf but provides a pointer to malloc'd storage, which
621
   must be freed by the caller.  */
622
 
623
extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
624
#endif
625
 
626
#if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
627
/* Like sprintf but prints at most N characters.  */
628
extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
629
#endif
630
 
631
#if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
632
/* Like vsprintf but prints at most N characters.  */
633
extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
634
#endif
635
 
636
#if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
637
/* Compare version strings.  */
638
extern int strverscmp (const char *, const char *);
639
#endif
640
 
641
/* Set the title of a process */
642
extern void setproctitle (const char *name, ...);
643
 
644
/* Increase stack limit if possible.  */
645
extern void stack_limit_increase (unsigned long);
646
 
647
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
648
 
649
/* Drastically simplified alloca configurator.  If we're using GCC,
650
   we use __builtin_alloca; otherwise we use the C alloca.  The C
651
   alloca is always available.  You can override GCC by defining
652
   USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
653
   also set/unset as it is often used to indicate whether code needs
654
   to call alloca(0).  */
655
extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
656
#undef alloca
657
#if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
658
# define alloca(x) __builtin_alloca(x)
659
# undef C_ALLOCA
660
# define ASTRDUP(X) \
661
  (__extension__ ({ const char *const libiberty_optr = (X); \
662
   const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
663
   char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
664
   (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
665
#else
666
# define alloca(x) C_alloca(x)
667
# undef USE_C_ALLOCA
668
# define USE_C_ALLOCA 1
669
# undef C_ALLOCA
670
# define C_ALLOCA 1
671
extern const char *libiberty_optr;
672
extern char *libiberty_nptr;
673
extern unsigned long libiberty_len;
674
# define ASTRDUP(X) \
675
  (libiberty_optr = (X), \
676
   libiberty_len = strlen (libiberty_optr) + 1, \
677
   libiberty_nptr = (char *) alloca (libiberty_len), \
678
   (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
679
#endif
680
 
681
#ifdef __cplusplus
682
}
683
#endif
684
 
685
 
686
#endif /* ! defined (LIBIBERTY_H) */

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