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[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [include/] [libiberty.h] - Blame information for rev 867

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1 330 jeremybenn
/* Function declarations for libiberty.
2
 
3
   Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4
   2006, 2007, 2008, 2009 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 last component of a path name.  Note that we can't use a
95
   prototype here because the parameter is declared inconsistently
96
   across different systems, sometimes as "char *" and sometimes as
97
   "const char *" */
98
 
99
/* HAVE_DECL_* is a three-state macro: undefined, 0 or 1.  If it is
100
   undefined, we haven't run the autoconf check so provide the
101
   declaration without arguments.  If it is 0, we checked and failed
102
   to find the declaration so provide a fully prototyped one.  If it
103
   is 1, we found it so don't provide any declaration at all.  */
104
#if !HAVE_DECL_BASENAME
105
#if defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME)
106
extern char *basename (const char *);
107
#else
108
/* Do not allow basename to be used if there is no prototype seen.  We
109
   either need to use the above prototype or have one from
110
   autoconf which would result in HAVE_DECL_BASENAME being set.  */
111
#define basename basename_cannot_be_used_without_a_prototype
112
#endif
113
#endif
114
 
115
/* A well-defined basename () that is always compiled in.  */
116
 
117
extern const char *lbasename (const char *);
118
 
119
/* Same, but assumes DOS semantics (drive name, backslash is also a
120
   dir separator) regardless of host.  */
121
 
122
extern const char *dos_lbasename (const char *);
123
 
124
/* Same, but assumes Unix semantics (absolute paths always start with
125
   a slash, only forward slash is accepted as dir separator)
126
   regardless of host.  */
127
 
128
extern const char *unix_lbasename (const char *);
129
 
130
/* A well-defined realpath () that is always compiled in.  */
131
 
132
extern char *lrealpath (const char *);
133
 
134
/* Concatenate an arbitrary number of strings.  You must pass NULL as
135
   the last argument of this function, to terminate the list of
136
   strings.  Allocates memory using xmalloc.  */
137
 
138
extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
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.  The first argument is
143
   not one of the strings to be concatenated, but if not NULL is a
144
   pointer to be freed after the new string is created, similar to the
145
   way xrealloc works.  */
146
 
147
extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
148
 
149
/* Determine the length of concatenating an arbitrary number of
150
   strings.  You must pass NULL as the last argument of this function,
151
   to terminate the list of strings.  */
152
 
153
extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
154
 
155
/* Concatenate an arbitrary number of strings into a SUPPLIED area of
156
   memory.  You must pass NULL as the last argument of this function,
157
   to terminate the list of strings.  The supplied memory is assumed
158
   to be large enough.  */
159
 
160
extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL;
161
 
162
/* Concatenate an arbitrary number of strings into a GLOBAL 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_copy2 (const char *, ...) ATTRIBUTE_SENTINEL;
168
 
169
/* This is the global area used by concat_copy2.  */
170
 
171
extern char *libiberty_concat_ptr;
172
 
173
/* Concatenate an arbitrary number of strings.  You must pass NULL as
174
   the last argument of this function, to terminate the list of
175
   strings.  Allocates memory using alloca.  The arguments are
176
   evaluated twice!  */
177
#define ACONCAT(ACONCAT_PARAMS) \
178
  (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
179
   concat_copy2 ACONCAT_PARAMS)
180
 
181
/* Check whether two file descriptors refer to the same file.  */
182
 
183
extern int fdmatch (int fd1, int fd2);
184
 
185
/* Return the position of the first bit set in the argument.  */
186
/* Prototypes vary from system to system, so we only provide a
187
   prototype on systems where we know that we need it.  */
188
#if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
189
extern int ffs(int);
190
#endif
191
 
192
/* Get the working directory.  The result is cached, so don't call
193
   chdir() between calls to getpwd().  */
194
 
195
extern char * getpwd (void);
196
 
197
/* Get the current time.  */
198
/* Prototypes vary from system to system, so we only provide a
199
   prototype on systems where we know that we need it.  */
200
#ifdef __MINGW32__
201
/* Forward declaration to avoid #include <sys/time.h>.   */
202
struct timeval;
203
extern int gettimeofday (struct timeval *, void *);
204
#endif
205
 
206
/* Get the amount of time the process has run, in microseconds.  */
207
 
208
extern long get_run_time (void);
209
 
210
/* Generate a relocated path to some installation directory.  Allocates
211
   return value using malloc.  */
212
 
213
extern char *make_relative_prefix (const char *, const char *,
214
                                   const char *) ATTRIBUTE_MALLOC;
215
 
216
/* Generate a relocated path to some installation directory without
217
   attempting to follow any soft links.  Allocates
218
   return value using malloc.  */
219
 
220
extern char *make_relative_prefix_ignore_links (const char *, const char *,
221
                                                const char *) ATTRIBUTE_MALLOC;
222
 
223
/* Choose a temporary directory to use for scratch files.  */
224
 
225
extern char *choose_temp_base (void) ATTRIBUTE_MALLOC;
226
 
227
/* Return a temporary file name or NULL if unable to create one.  */
228
 
229
extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
230
 
231
/* Remove a link to a file unless it is special. */
232
 
233
extern int unlink_if_ordinary (const char *);
234
 
235
/* Allocate memory filled with spaces.  Allocates using malloc.  */
236
 
237
extern const char *spaces (int count);
238
 
239
/* Return the maximum error number for which strerror will return a
240
   string.  */
241
 
242
extern int errno_max (void);
243
 
244
/* Return the name of an errno value (e.g., strerrno (EINVAL) returns
245
   "EINVAL").  */
246
 
247
extern const char *strerrno (int);
248
 
249
/* Given the name of an errno value, return the value.  */
250
 
251
extern int strtoerrno (const char *);
252
 
253
/* ANSI's strerror(), but more robust.  */
254
 
255
extern char *xstrerror (int);
256
 
257
/* Return the maximum signal number for which strsignal will return a
258
   string.  */
259
 
260
extern int signo_max (void);
261
 
262
/* Return a signal message string for a signal number
263
   (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
264
/* This is commented out as it can conflict with one in system headers.
265
   We still document its existence though.  */
266
 
267
/*extern const char *strsignal (int);*/
268
 
269
/* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
270
   "SIGHUP").  */
271
 
272
extern const char *strsigno (int);
273
 
274
/* Given the name of a signal, return its number.  */
275
 
276
extern int strtosigno (const char *);
277
 
278
/* Register a function to be run by xexit.  Returns 0 on success.  */
279
 
280
extern int xatexit (void (*fn) (void));
281
 
282
/* Exit, calling all the functions registered with xatexit.  */
283
 
284
extern void xexit (int status) ATTRIBUTE_NORETURN;
285
 
286
/* Set the program name used by xmalloc.  */
287
 
288
extern void xmalloc_set_program_name (const char *);
289
 
290
/* Report an allocation failure.  */
291
extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
292
 
293
/* Allocate memory without fail.  If malloc fails, this will print a
294
   message to stderr (using the name set by xmalloc_set_program_name,
295
   if any) and then call xexit.  */
296
 
297
extern void *xmalloc (size_t) ATTRIBUTE_MALLOC;
298
 
299
/* Reallocate memory without fail.  This works like xmalloc.  Note,
300
   realloc type functions are not suitable for attribute malloc since
301
   they may return the same address across multiple calls. */
302
 
303
extern void *xrealloc (void *, size_t);
304
 
305
/* Allocate memory without fail and set it to zero.  This works like
306
   xmalloc.  */
307
 
308
extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
309
 
310
/* Copy a string into a memory buffer without fail.  */
311
 
312
extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
313
 
314
/* Copy at most N characters from string into a buffer without fail.  */
315
 
316
extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
317
 
318
/* Copy an existing memory buffer to a new memory buffer without fail.  */
319
 
320
extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC;
321
 
322
/* Physical memory routines.  Return values are in BYTES.  */
323
extern double physmem_total (void);
324
extern double physmem_available (void);
325
 
326
/* Compute the 32-bit CRC of a block of memory.  */
327
extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
328
 
329
/* These macros provide a K&R/C89/C++-friendly way of allocating structures
330
   with nice encapsulation.  The XDELETE*() macros are technically
331
   superfluous, but provided here for symmetry.  Using them consistently
332
   makes it easier to update client code to use different allocators such
333
   as new/delete and new[]/delete[].  */
334
 
335
/* Scalar allocators.  */
336
 
337
#define XALLOCA(T)              ((T *) alloca (sizeof (T)))
338
#define XNEW(T)                 ((T *) xmalloc (sizeof (T)))
339
#define XCNEW(T)                ((T *) xcalloc (1, sizeof (T)))
340
#define XDUP(T, P)              ((T *) xmemdup ((P), sizeof (T), sizeof (T)))
341
#define XDELETE(P)              free ((void*) (P))
342
 
343
/* Array allocators.  */
344
 
345
#define XALLOCAVEC(T, N)        ((T *) alloca (sizeof (T) * (N)))
346
#define XNEWVEC(T, N)           ((T *) xmalloc (sizeof (T) * (N)))
347
#define XCNEWVEC(T, N)          ((T *) xcalloc ((N), sizeof (T)))
348
#define XDUPVEC(T, P, N)        ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N)))
349
#define XRESIZEVEC(T, P, N)     ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
350
#define XDELETEVEC(P)           free ((void*) (P))
351
 
352
/* Allocators for variable-sized structures and raw buffers.  */
353
 
354
#define XALLOCAVAR(T, S)        ((T *) alloca ((S)))
355
#define XNEWVAR(T, S)           ((T *) xmalloc ((S)))
356
#define XCNEWVAR(T, S)          ((T *) xcalloc (1, (S)))
357
#define XDUPVAR(T, P, S1, S2)   ((T *) xmemdup ((P), (S1), (S2)))
358
#define XRESIZEVAR(T, P, S)     ((T *) xrealloc ((P), (S)))
359
 
360
/* Type-safe obstack allocator.  */
361
 
362
#define XOBNEW(O, T)            ((T *) obstack_alloc ((O), sizeof (T)))
363
#define XOBNEWVEC(O, T, N)      ((T *) obstack_alloc ((O), sizeof (T) * (N)))
364
#define XOBNEWVAR(O, T, S)      ((T *) obstack_alloc ((O), (S)))
365
#define XOBFINISH(O, T)         ((T) obstack_finish ((O)))
366
 
367
/* hex character manipulation routines */
368
 
369
#define _hex_array_size 256
370
#define _hex_bad        99
371
extern const unsigned char _hex_value[_hex_array_size];
372
extern void hex_init (void);
373
#define hex_p(c)        (hex_value (c) != _hex_bad)
374
/* If you change this, note well: Some code relies on side effects in
375
   the argument being performed exactly once.  */
376
#define hex_value(c)    ((unsigned int) _hex_value[(unsigned char) (c)])
377
 
378
/* Flags for pex_init.  These are bits to be or'ed together.  */
379
 
380
/* Record subprocess times, if possible.  */
381
#define PEX_RECORD_TIMES        0x1
382
 
383
/* Use pipes for communication between processes, if possible.  */
384
#define PEX_USE_PIPES           0x2
385
 
386
/* Save files used for communication between processes.  */
387
#define PEX_SAVE_TEMPS          0x4
388
 
389
/* Prepare to execute one or more programs, with standard output of
390
   each program fed to standard input of the next.
391
   FLAGS        As above.
392
   PNAME        The name of the program to report in error messages.
393
   TEMPBASE     A base name to use for temporary files; may be NULL to
394
                use a random name.
395
   Returns NULL on error.  */
396
 
397
extern struct pex_obj *pex_init (int flags, const char *pname,
398
                                 const char *tempbase);
399
 
400
/* Flags for pex_run.  These are bits to be or'ed together.  */
401
 
402
/* Last program in pipeline.  Standard output of program goes to
403
   OUTNAME, or, if OUTNAME is NULL, to standard output of caller.  Do
404
   not set this if you want to call pex_read_output.  After this is
405
   set, pex_run may no longer be called with the same struct
406
   pex_obj.  */
407
#define PEX_LAST                0x1
408
 
409
/* Search for program in executable search path.  */
410
#define PEX_SEARCH              0x2
411
 
412
/* OUTNAME is a suffix.  */
413
#define PEX_SUFFIX              0x4
414
 
415
/* Send program's standard error to standard output.  */
416
#define PEX_STDERR_TO_STDOUT    0x8
417
 
418
/* Input file should be opened in binary mode.  This flag is ignored
419
   on Unix.  */
420
#define PEX_BINARY_INPUT        0x10
421
 
422
/* Output file should be opened in binary mode.  This flag is ignored
423
   on Unix.  For proper behaviour PEX_BINARY_INPUT and
424
   PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
425
   PEX_BINARY_OUTPUT should be followed by a call using
426
   PEX_BINARY_INPUT.  */
427
#define PEX_BINARY_OUTPUT       0x20
428
 
429
/* Capture stderr to a pipe.  The output can be read by
430
   calling pex_read_err and reading from the returned
431
   FILE object.  This flag may be specified only for
432
   the last program in a pipeline.
433
 
434
   This flag is supported only on Unix and Windows.  */
435
#define PEX_STDERR_TO_PIPE      0x40
436
 
437
/* Capture stderr in binary mode.  This flag is ignored
438
   on Unix.  */
439
#define PEX_BINARY_ERROR        0x80
440
 
441
 
442
/* Execute one program.  Returns NULL on success.  On error returns an
443
   error string (typically just the name of a system call); the error
444
   string is statically allocated.
445
 
446
   OBJ          Returned by pex_init.
447
 
448
   FLAGS        As above.
449
 
450
   EXECUTABLE   The program to execute.
451
 
452
   ARGV         NULL terminated array of arguments to pass to the program.
453
 
454
   OUTNAME      Sets the output file name as follows:
455
 
456
                PEX_SUFFIX set (OUTNAME may not be NULL):
457
                  TEMPBASE parameter to pex_init not NULL:
458
                    Output file name is the concatenation of TEMPBASE
459
                    and OUTNAME.
460
                  TEMPBASE is NULL:
461
                    Output file name is a random file name ending in
462
                    OUTNAME.
463
                PEX_SUFFIX not set:
464
                  OUTNAME not NULL:
465
                    Output file name is OUTNAME.
466
                  OUTNAME NULL, TEMPBASE not NULL:
467
                    Output file name is randomly chosen using
468
                    TEMPBASE.
469
                  OUTNAME NULL, TEMPBASE NULL:
470
                    Output file name is randomly chosen.
471
 
472
                If PEX_LAST is not set, the output file name is the
473
                name to use for a temporary file holding stdout, if
474
                any (there will not be a file if PEX_USE_PIPES is set
475
                and the system supports pipes).  If a file is used, it
476
                will be removed when no longer needed unless
477
                PEX_SAVE_TEMPS is set.
478
 
479
                If PEX_LAST is set, and OUTNAME is not NULL, standard
480
                output is written to the output file name.  The file
481
                will not be removed.  If PEX_LAST and PEX_SUFFIX are
482
                both set, TEMPBASE may not be NULL.
483
 
484
   ERRNAME      If not NULL, this is the name of a file to which
485
                standard error is written.  If NULL, standard error of
486
                the program is standard error of the caller.
487
 
488
   ERR          On an error return, *ERR is set to an errno value, or
489
                to 0 if there is no relevant errno.
490
*/
491
 
492
extern const char *pex_run (struct pex_obj *obj, int flags,
493
                            const char *executable, char * const *argv,
494
                            const char *outname, const char *errname,
495
                            int *err);
496
 
497
/* As for pex_run (), but takes an extra parameter to enable the
498
   environment for the child process to be specified.
499
 
500
   ENV          The environment for the child process, specified as
501
                an array of character pointers.  Each element of the
502
                array should point to a string of the form VAR=VALUE,
503
                with the exception of the last element which must be
504
                a null pointer.
505
*/
506
 
507
extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
508
                                           const char *executable,
509
                                           char * const *argv,
510
                                           char * const *env,
511
                                           const char *outname,
512
                                           const char *errname, int *err);
513
 
514
/* Return a stream for a temporary file to pass to the first program
515
   in the pipeline as input.  The file name is chosen as for pex_run.
516
   pex_run closes the file automatically; don't close it yourself.  */
517
 
518
extern FILE *pex_input_file (struct pex_obj *obj, int flags,
519
                             const char *in_name);
520
 
521
/* Return a stream for a pipe connected to the standard input of the
522
   first program in the pipeline.  You must have passed
523
   `PEX_USE_PIPES' to `pex_init'.  Close the returned stream
524
   yourself.  */
525
 
526
extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
527
 
528
/* Read the standard output of the last program to be executed.
529
   pex_run can not be called after this.  BINARY should be non-zero if
530
   the file should be opened in binary mode; this is ignored on Unix.
531
   Returns NULL on error.  Don't call fclose on the returned FILE; it
532
   will be closed by pex_free.  */
533
 
534
extern FILE *pex_read_output (struct pex_obj *, int binary);
535
 
536
/* Read the standard error of the last program to be executed.
537
   pex_run can not be called after this.  BINARY should be non-zero if
538
   the file should be opened in binary mode; this is ignored on Unix.
539
   Returns NULL on error.  Don't call fclose on the returned FILE; it
540
   will be closed by pex_free.  */
541
 
542
extern FILE *pex_read_err (struct pex_obj *, int binary);
543
 
544
/* Return exit status of all programs in VECTOR.  COUNT indicates the
545
   size of VECTOR.  The status codes in the vector are in the order of
546
   the calls to pex_run.  Returns 0 on error, 1 on success.  */
547
 
548
extern int pex_get_status (struct pex_obj *, int count, int *vector);
549
 
550
/* Return times of all programs in VECTOR.  COUNT indicates the size
551
   of VECTOR.  struct pex_time is really just struct timeval, but that
552
   is not portable to all systems.  Returns 0 on error, 1 on
553
   success.  */
554
 
555
struct pex_time
556
{
557
  unsigned long user_seconds;
558
  unsigned long user_microseconds;
559
  unsigned long system_seconds;
560
  unsigned long system_microseconds;
561
};
562
 
563
extern int pex_get_times (struct pex_obj *, int count,
564
                          struct pex_time *vector);
565
 
566
/* Clean up a pex_obj.  If you have not called pex_get_times or
567
   pex_get_status, this will try to kill the subprocesses.  */
568
 
569
extern void pex_free (struct pex_obj *);
570
 
571
/* Just execute one program.  Return value is as for pex_run.
572
   FLAGS        Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
573
   EXECUTABLE   As for pex_run.
574
   ARGV         As for pex_run.
575
   PNAME        As for pex_init.
576
   OUTNAME      As for pex_run when PEX_LAST is set.
577
   ERRNAME      As for pex_run.
578
   STATUS       Set to exit status on success.
579
   ERR          As for pex_run.
580
*/
581
 
582
extern const char *pex_one (int flags, const char *executable,
583
                            char * const *argv, const char *pname,
584
                            const char *outname, const char *errname,
585
                            int *status, int *err);
586
 
587
/* pexecute and pwait are the old pexecute interface, still here for
588
   backward compatibility.  Don't use these for new code.  Instead,
589
   use pex_init/pex_run/pex_get_status/pex_free, or pex_one.  */
590
 
591
/* Definitions used by the pexecute routine.  */
592
 
593
#define PEXECUTE_FIRST   1
594
#define PEXECUTE_LAST    2
595
#define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
596
#define PEXECUTE_SEARCH  4
597
#define PEXECUTE_VERBOSE 8
598
 
599
/* Execute a program.  */
600
 
601
extern int pexecute (const char *, char * const *, const char *,
602
                     const char *, char **, char **, int);
603
 
604
/* Wait for pexecute to finish.  */
605
 
606
extern int pwait (int, int *, int);
607
 
608
#if !HAVE_DECL_ASPRINTF
609
/* Like sprintf but provides a pointer to malloc'd storage, which must
610
   be freed by the caller.  */
611
 
612
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
613
#endif
614
 
615
#if !HAVE_DECL_VASPRINTF
616
/* Like vsprintf but provides a pointer to malloc'd storage, which
617
   must be freed by the caller.  */
618
 
619
extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
620
#endif
621
 
622
#if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
623
/* Like sprintf but prints at most N characters.  */
624
extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
625
#endif
626
 
627
#if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
628
/* Like vsprintf but prints at most N characters.  */
629
extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
630
#endif
631
 
632
#if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
633
/* Compare version strings.  */
634
extern int strverscmp (const char *, const char *);
635
#endif
636
 
637
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
638
 
639
/* Drastically simplified alloca configurator.  If we're using GCC,
640
   we use __builtin_alloca; otherwise we use the C alloca.  The C
641
   alloca is always available.  You can override GCC by defining
642
   USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
643
   also set/unset as it is often used to indicate whether code needs
644
   to call alloca(0).  */
645
extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
646
#undef alloca
647
#if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
648
# define alloca(x) __builtin_alloca(x)
649
# undef C_ALLOCA
650
# define ASTRDUP(X) \
651
  (__extension__ ({ const char *const libiberty_optr = (X); \
652
   const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
653
   char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
654
   (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
655
#else
656
# define alloca(x) C_alloca(x)
657
# undef USE_C_ALLOCA
658
# define USE_C_ALLOCA 1
659
# undef C_ALLOCA
660
# define C_ALLOCA 1
661
extern const char *libiberty_optr;
662
extern char *libiberty_nptr;
663
extern unsigned long libiberty_len;
664
# define ASTRDUP(X) \
665
  (libiberty_optr = (X), \
666
   libiberty_len = strlen (libiberty_optr) + 1, \
667
   libiberty_nptr = (char *) alloca (libiberty_len), \
668
   (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
669
#endif
670
 
671
#ifdef __cplusplus
672
}
673
#endif
674
 
675
 
676
#endif /* ! defined (LIBIBERTY_H) */

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