* bucomm.c (make_tempname): Stop memory leak.
[binutils.git] / include / libiberty.h
blob1cc7250bf3c9b2e5aacedd990647aeafe33e653c
1 /* Function declarations for libiberty.
3 Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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.
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.
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.
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.
28 Written by Cygnus Support, 1994.
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. */
36 #ifndef LIBIBERTY_H
37 #define LIBIBERTY_H
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
43 #include "ansidecl.h"
45 /* Get a definition for size_t. */
46 #include <stddef.h>
47 /* Get a definition for va_list. */
48 #include <stdarg.h>
50 #include <stdio.h>
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. */
56 extern void unlock_stream (FILE *);
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. */
62 extern void unlock_std_streams (void);
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. */
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 *);
72 /* Build an argument vector from a string. Allocates memory using
73 malloc. Use freeargv to free the vector. */
75 extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
77 /* Free a vector returned by buildargv. */
79 extern void freeargv (char **);
81 /* Duplicate an argument vector. Allocates memory using malloc. Use
82 freeargv to free the vector. */
84 extern char **dupargv (char **) ATTRIBUTE_MALLOC;
86 /* Expand "@file" arguments in argv. */
88 extern void expandargv PARAMS ((int *, char ***));
90 /* Write argv to an @-file, inserting necessary quoting. */
92 extern int writeargv PARAMS ((char **, FILE *));
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 *" */
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
115 /* A well-defined basename () that is always compiled in. */
117 extern const char *lbasename (const char *);
119 /* Same, but assumes DOS semantics (drive name, backslash is also a
120 dir separator) regardless of host. */
122 extern const char *dos_lbasename (const char *);
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. */
128 extern const char *unix_lbasename (const char *);
130 /* A well-defined realpath () that is always compiled in. */
132 extern char *lrealpath (const char *);
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. */
138 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
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. */
147 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
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. */
153 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
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. */
160 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL;
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. */
167 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL;
169 /* This is the global area used by concat_copy2. */
171 extern char *libiberty_concat_ptr;
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)
181 /* Check whether two file descriptors refer to the same file. */
183 extern int fdmatch (int fd1, int fd2);
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
192 /* Get the working directory. The result is cached, so don't call
193 chdir() between calls to getpwd(). */
195 extern char * getpwd (void);
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
206 /* Get the amount of time the process has run, in microseconds. */
208 extern long get_run_time (void);
210 /* Generate a relocated path to some installation directory. Allocates
211 return value using malloc. */
213 extern char *make_relative_prefix (const char *, const char *,
214 const char *) ATTRIBUTE_MALLOC;
216 /* Generate a relocated path to some installation directory without
217 attempting to follow any soft links. Allocates
218 return value using malloc. */
220 extern char *make_relative_prefix_ignore_links (const char *, const char *,
221 const char *) ATTRIBUTE_MALLOC;
223 /* Choose a temporary directory to use for scratch files. */
225 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC;
227 /* Return a temporary file name or NULL if unable to create one. */
229 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
231 /* Remove a link to a file unless it is special. */
233 extern int unlink_if_ordinary (const char *);
235 /* Allocate memory filled with spaces. Allocates using malloc. */
237 extern const char *spaces (int count);
239 /* Return the maximum error number for which strerror will return a
240 string. */
242 extern int errno_max (void);
244 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
245 "EINVAL"). */
247 extern const char *strerrno (int);
249 /* Given the name of an errno value, return the value. */
251 extern int strtoerrno (const char *);
253 /* ANSI's strerror(), but more robust. */
255 extern char *xstrerror (int);
257 /* Return the maximum signal number for which strsignal will return a
258 string. */
260 extern int signo_max (void);
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. */
267 /*extern const char *strsignal (int);*/
269 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
270 "SIGHUP"). */
272 extern const char *strsigno (int);
274 /* Given the name of a signal, return its number. */
276 extern int strtosigno (const char *);
278 /* Register a function to be run by xexit. Returns 0 on success. */
280 extern int xatexit (void (*fn) (void));
282 /* Exit, calling all the functions registered with xatexit. */
284 extern void xexit (int status) ATTRIBUTE_NORETURN;
286 /* Set the program name used by xmalloc. */
288 extern void xmalloc_set_program_name (const char *);
290 /* Report an allocation failure. */
291 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
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. */
297 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC;
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. */
303 extern void *xrealloc (void *, size_t);
305 /* Allocate memory without fail and set it to zero. This works like
306 xmalloc. */
308 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
310 /* Copy a string into a memory buffer without fail. */
312 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
314 /* Copy at most N characters from string into a buffer without fail. */
316 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
318 /* Copy an existing memory buffer to a new memory buffer without fail. */
320 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC;
322 /* Physical memory routines. Return values are in BYTES. */
323 extern double physmem_total (void);
324 extern double physmem_available (void);
326 /* Compute the 32-bit CRC of a block of memory. */
327 extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
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[]. */
335 /* Scalar allocators. */
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))
343 /* Array allocators. */
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))
352 /* Allocators for variable-sized structures and raw buffers. */
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)))
360 /* Type-safe obstack allocator. */
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)))
367 /* hex character manipulation routines */
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)])
378 /* Flags for pex_init. These are bits to be or'ed together. */
380 /* Record subprocess times, if possible. */
381 #define PEX_RECORD_TIMES 0x1
383 /* Use pipes for communication between processes, if possible. */
384 #define PEX_USE_PIPES 0x2
386 /* Save files used for communication between processes. */
387 #define PEX_SAVE_TEMPS 0x4
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. */
397 extern struct pex_obj *pex_init (int flags, const char *pname,
398 const char *tempbase);
400 /* Flags for pex_run. These are bits to be or'ed together. */
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
409 /* Search for program in executable search path. */
410 #define PEX_SEARCH 0x2
412 /* OUTNAME is a suffix. */
413 #define PEX_SUFFIX 0x4
415 /* Send program's standard error to standard output. */
416 #define PEX_STDERR_TO_STDOUT 0x8
418 /* Input file should be opened in binary mode. This flag is ignored
419 on Unix. */
420 #define PEX_BINARY_INPUT 0x10
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
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.
434 This flag is supported only on Unix and Windows. */
435 #define PEX_STDERR_TO_PIPE 0x40
437 /* Capture stderr in binary mode. This flag is ignored
438 on Unix. */
439 #define PEX_BINARY_ERROR 0x80
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.
446 OBJ Returned by pex_init.
448 FLAGS As above.
450 EXECUTABLE The program to execute.
452 ARGV NULL terminated array of arguments to pass to the program.
454 OUTNAME Sets the output file name as follows:
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.
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.
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.
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.
488 ERR On an error return, *ERR is set to an errno value, or
489 to 0 if there is no relevant errno.
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);
497 /* As for pex_run (), but takes an extra parameter to enable the
498 environment for the child process to be specified.
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.
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);
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. */
518 extern FILE *pex_input_file (struct pex_obj *obj, int flags,
519 const char *in_name);
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. */
526 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
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. */
534 extern FILE *pex_read_output (struct pex_obj *, int binary);
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. */
542 extern FILE *pex_read_err (struct pex_obj *, int binary);
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. */
548 extern int pex_get_status (struct pex_obj *, int count, int *vector);
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. */
555 struct pex_time
557 unsigned long user_seconds;
558 unsigned long user_microseconds;
559 unsigned long system_seconds;
560 unsigned long system_microseconds;
563 extern int pex_get_times (struct pex_obj *, int count,
564 struct pex_time *vector);
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. */
569 extern void pex_free (struct pex_obj *);
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.
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);
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. */
591 /* Definitions used by the pexecute routine. */
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
599 /* Execute a program. */
601 extern int pexecute (const char *, char * const *, const char *,
602 const char *, char **, char **, int);
604 /* Wait for pexecute to finish. */
606 extern int pwait (int, int *, int);
608 #if !HAVE_DECL_ASPRINTF
609 /* Like sprintf but provides a pointer to malloc'd storage, which must
610 be freed by the caller. */
612 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
613 #endif
615 #if !HAVE_DECL_VASPRINTF
616 /* Like vsprintf but provides a pointer to malloc'd storage, which
617 must be freed by the caller. */
619 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
620 #endif
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
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
632 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
633 /* Compare version strings. */
634 extern int strverscmp (const char *, const char *);
635 #endif
637 /* Set the title of a process */
638 extern void setproctitle (const char *name, ...);
640 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
642 /* Drastically simplified alloca configurator. If we're using GCC,
643 we use __builtin_alloca; otherwise we use the C alloca. The C
644 alloca is always available. You can override GCC by defining
645 USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
646 also set/unset as it is often used to indicate whether code needs
647 to call alloca(0). */
648 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
649 #undef alloca
650 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
651 # define alloca(x) __builtin_alloca(x)
652 # undef C_ALLOCA
653 # define ASTRDUP(X) \
654 (__extension__ ({ const char *const libiberty_optr = (X); \
655 const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
656 char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
657 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
658 #else
659 # define alloca(x) C_alloca(x)
660 # undef USE_C_ALLOCA
661 # define USE_C_ALLOCA 1
662 # undef C_ALLOCA
663 # define C_ALLOCA 1
664 extern const char *libiberty_optr;
665 extern char *libiberty_nptr;
666 extern unsigned long libiberty_len;
667 # define ASTRDUP(X) \
668 (libiberty_optr = (X), \
669 libiberty_len = strlen (libiberty_optr) + 1, \
670 libiberty_nptr = (char *) alloca (libiberty_len), \
671 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
672 #endif
674 #ifdef __cplusplus
676 #endif
679 #endif /* ! defined (LIBIBERTY_H) */