1 /* Function declarations for libiberty.
2 
3    Copyright 2001, 2002, 2005 Free Software Foundation, Inc.
4 
5    Note - certain prototypes declared in this header file are for
6    functions whoes implementation copyright does not belong to the
7    FSF.  Those prototypes are present in this file for reference
8    purposes only and their presence in this file should not construed
9    as an indication of ownership by the FSF of the implementation of
10    those functions in any way or form whatsoever.
11 
12    This program is free software; you can redistribute it and/or modify
13    it under the terms of the GNU General Public License as published by
14    the Free Software Foundation; either version 2, or (at your option)
15    any later version.
16 
17    This program is distributed in the hope that it will be useful,
18    but WITHOUT ANY WARRANTY; without even the implied warranty of
19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20    GNU General Public License for more details.
21 
22    You should have received a copy of the GNU General Public License
23    along with this program; if not, write to the Free Software
24    Foundation, Inc., 51 Franklin Street - Fifth Floor,
25    Boston, MA 02110-1301, USA.
26 
27    Written by Cygnus Support, 1994.
28 
29    The libiberty library provides a number of functions which are
30    missing on some operating systems.  We do not declare those here,
31    to avoid conflicts with the system header files on operating
32    systems that do support those functions.  In this file we only
33    declare those functions which are specific to libiberty.  */
34 
35 #ifndef LIBIBERTY_H
36 #define LIBIBERTY_H
37 
38 #ifdef __cplusplus
39 extern "C" {
40 #endif
41 
42 #include "ansidecl.h"
43 
44 /* Get a definition for size_t.  */
45 #include <stddef.h>
46 /* Get a definition for va_list.  */
47 #include <stdarg.h>
48 
49 #include <stdio.h>
50 
51 /* If the OS supports it, ensure that the supplied stream is setup to
52    avoid any multi-threaded locking.  Otherwise leave the FILE pointer
53    unchanged.  If the stream is NULL do nothing.  */
54 
55 extern void unlock_stream (FILE *);
56 
57 /* If the OS supports it, ensure that the standard I/O streams, stdin,
58    stdout and stderr are setup to avoid any multi-threaded locking.
59    Otherwise do nothing.  */
60 
61 extern void unlock_std_streams (void);
62 
63 /* Open and return a FILE pointer.  If the OS supports it, ensure that
64    the stream is setup to avoid any multi-threaded locking.  Otherwise
65    return the FILE pointer unchanged.  */
66 
67 extern FILE *fopen_unlocked (const char *, const char *);
68 extern FILE *fdopen_unlocked (int, const char *);
69 extern FILE *freopen_unlocked (const char *, const char *, FILE *);
70 
71 /* Build an argument vector from a string.  Allocates memory using
72    malloc.  Use freeargv to free the vector.  */
73 
74 extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
75 
76 /* Free a vector returned by buildargv.  */
77 
78 extern void freeargv (char **);
79 
80 /* Duplicate an argument vector. Allocates memory using malloc.  Use
81    freeargv to free the vector.  */
82 
83 extern char **dupargv (char **) ATTRIBUTE_MALLOC;
84 
85 /* Expand "@file" arguments in argv.  */
86 
87 extern void expandargv PARAMS ((int *, char ***));
88 
89 /* Return the last component of a path name.  Note that we can't use a
90    prototype here because the parameter is declared inconsistently
91    across different systems, sometimes as "char *" and sometimes as
92    "const char *" */
93 
94 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1.  If it is
95    undefined, we haven't run the autoconf check so provide the
96    declaration without arguments.  If it is 0, we checked and failed
97    to find the declaration so provide a fully prototyped one.  If it
98    is 1, we found it so don't provide any declaration at all.  */
99 #if !HAVE_DECL_BASENAME
100 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME)
101 extern char *basename (const char *);
102 #else
103 /* Do not allow basename to be used if there is no prototype seen.  We
104    either need to use the above prototype or have one from
105    autoconf which would result in HAVE_DECL_BASENAME being set.  */
106 #define basename basename_cannot_be_used_without_a_prototype
107 #endif
108 #endif
109 
110 /* A well-defined basename () that is always compiled in.  */
111 
112 extern const char *lbasename (const char *);
113 
114 /* A well-defined realpath () that is always compiled in.  */
115 
116 extern char *lrealpath (const char *);
117 
118 /* Concatenate an arbitrary number of strings.  You must pass NULL as
119    the last argument of this function, to terminate the list of
120    strings.  Allocates memory using xmalloc.  */
121 
122 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
123 
124 /* Concatenate an arbitrary number of strings.  You must pass NULL as
125    the last argument of this function, to terminate the list of
126    strings.  Allocates memory using xmalloc.  The first argument is
127    not one of the strings to be concatenated, but if not NULL is a
128    pointer to be freed after the new string is created, similar to the
129    way xrealloc works.  */
130 
131 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
132 
133 /* Determine the length of concatenating an arbitrary number of
134    strings.  You must pass NULL as the last argument of this function,
135    to terminate the list of strings.  */
136 
137 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
138 
139 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
140    memory.  You must pass NULL as the last argument of this function,
141    to terminate the list of strings.  The supplied memory is assumed
142    to be large enough.  */
143 
144 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL;
145 
146 /* Concatenate an arbitrary number of strings into a GLOBAL area of
147    memory.  You must pass NULL as the last argument of this function,
148    to terminate the list of strings.  The supplied memory is assumed
149    to be large enough.  */
150 
151 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL;
152 
153 /* This is the global area used by concat_copy2.  */
154 
155 extern char *libiberty_concat_ptr;
156 
157 /* Concatenate an arbitrary number of strings.  You must pass NULL as
158    the last argument of this function, to terminate the list of
159    strings.  Allocates memory using alloca.  The arguments are
160    evaluated twice!  */
161 #define ACONCAT(ACONCAT_PARAMS) \
162   (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
163    concat_copy2 ACONCAT_PARAMS)
164 
165 /* Check whether two file descriptors refer to the same file.  */
166 
167 extern int fdmatch (int fd1, int fd2);
168 
169 /* Return the position of the first bit set in the argument.  */
170 /* Prototypes vary from system to system, so we only provide a
171    prototype on systems where we know that we need it.  */
172 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
173 extern int ffs(int);
174 #endif
175 
176 /* Get the working directory.  The result is cached, so don't call
177    chdir() between calls to getpwd().  */
178 
179 extern char * getpwd (void);
180 
181 /* Get the current time.  */
182 /* Prototypes vary from system to system, so we only provide a
183    prototype on systems where we know that we need it.  */
184 #ifdef __MINGW32__
185 /* Forward declaration to avoid #include <sys/time.h>.   */
186 struct timeval;
187 extern int gettimeofday (struct timeval *, void *);
188 #endif
189 
190 /* Get the amount of time the process has run, in microseconds.  */
191 
192 extern long get_run_time (void);
193 
194 /* Generate a relocated path to some installation directory.  Allocates
195    return value using malloc.  */
196 
197 extern char *make_relative_prefix (const char *, const char *,
198                                    const char *) ATTRIBUTE_MALLOC;
199 
200 /* LLVM LOCAL begin */
201 /* Generate a relocated path to some installation directory without
202    attempting to follow any soft links.  Allocates
203    return value using malloc.  */
204 
205 extern char *make_relative_prefix_ignore_links (const char *, const char *,
206 						const char *) ATTRIBUTE_MALLOC;
207 /* LLVM LOCAL end */
208 
209 /* Choose a temporary directory to use for scratch files.  */
210 
211 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC;
212 
213 /* Return a temporary file name or NULL if unable to create one.  */
214 
215 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
216 
217 /* Remove a link to a file unless it is special. */
218 
219 extern int unlink_if_ordinary (const char *);
220 
221 /* Allocate memory filled with spaces.  Allocates using malloc.  */
222 
223 extern const char *spaces (int count);
224 
225 /* Return the maximum error number for which strerror will return a
226    string.  */
227 
228 extern int errno_max (void);
229 
230 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
231    "EINVAL").  */
232 
233 extern const char *strerrno (int);
234 
235 /* Given the name of an errno value, return the value.  */
236 
237 extern int strtoerrno (const char *);
238 
239 /* ANSI's strerror(), but more robust.  */
240 
241 extern char *xstrerror (int);
242 
243 /* Return the maximum signal number for which strsignal will return a
244    string.  */
245 
246 extern int signo_max (void);
247 
248 /* Return a signal message string for a signal number
249    (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
250 /* This is commented out as it can conflict with one in system headers.
251    We still document its existence though.  */
252 
253 /*extern const char *strsignal (int);*/
254 
255 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
256    "SIGHUP").  */
257 
258 extern const char *strsigno (int);
259 
260 /* Given the name of a signal, return its number.  */
261 
262 extern int strtosigno (const char *);
263 
264 /* Register a function to be run by xexit.  Returns 0 on success.  */
265 
266 extern int xatexit (void (*fn) (void));
267 
268 /* Exit, calling all the functions registered with xatexit.  */
269 
270 extern void xexit (int status) ATTRIBUTE_NORETURN;
271 
272 /* Set the program name used by xmalloc.  */
273 
274 extern void xmalloc_set_program_name (const char *);
275 
276 /* Report an allocation failure.  */
277 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
278 
279 /* Allocate memory without fail.  If malloc fails, this will print a
280    message to stderr (using the name set by xmalloc_set_program_name,
281    if any) and then call xexit.  */
282 
283 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC;
284 
285 /* Reallocate memory without fail.  This works like xmalloc.  Note,
286    realloc type functions are not suitable for attribute malloc since
287    they may return the same address across multiple calls. */
288 
289 extern void *xrealloc (void *, size_t);
290 
291 /* Allocate memory without fail and set it to zero.  This works like
292    xmalloc.  */
293 
294 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
295 
296 /* Copy a string into a memory buffer without fail.  */
297 
298 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
299 
300 /* Copy at most N characters from string into a buffer without fail.  */
301 
302 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
303 
304 /* Copy an existing memory buffer to a new memory buffer without fail.  */
305 
306 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC;
307 
308 /* APPLE LOCAL begin retune gc params 6124839 */
309 extern unsigned int ncpu_available (void);
310 /* APPLE LOCAL end retune gc params 6124839 */
311 
312 /* Physical memory routines.  Return values are in BYTES.  */
313 extern double physmem_total (void);
314 extern double physmem_available (void);
315 
316 
317 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
318    with nice encapsulation.  The XDELETE*() macros are technically
319    superfluous, but provided here for symmetry.  Using them consistently
320    makes it easier to update client code to use different allocators such
321    as new/delete and new[]/delete[].  */
322 
323 /* Scalar allocators.  */
324 
325 #define XNEW(T)			((T *) xmalloc (sizeof (T)))
326 #define XCNEW(T)		((T *) xcalloc (1, sizeof (T)))
327 #define XDELETE(P)		free ((void*) (P))
328 
329 /* Array allocators.  */
330 
331 #define XNEWVEC(T, N)		((T *) xmalloc (sizeof (T) * (N)))
332 #define XCNEWVEC(T, N)		((T *) xcalloc ((N), sizeof (T)))
333 #define XRESIZEVEC(T, P, N)	((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
334 #define XDELETEVEC(P)		free ((void*) (P))
335 
336 /* Allocators for variable-sized structures and raw buffers.  */
337 
338 #define XNEWVAR(T, S)		((T *) xmalloc ((S)))
339 #define XCNEWVAR(T, S)		((T *) xcalloc (1, (S)))
340 #define XRESIZEVAR(T, P, S)	((T *) xrealloc ((P), (S)))
341 
342 /* Type-safe obstack allocator.  */
343 
344 #define XOBNEW(O, T)		((T *) obstack_alloc ((O), sizeof (T)))
345 #define XOBFINISH(O, T)         ((T) obstack_finish ((O)))
346 
347 /* hex character manipulation routines */
348 
349 #define _hex_array_size 256
350 #define _hex_bad	99
351 extern const unsigned char _hex_value[_hex_array_size];
352 extern void hex_init (void);
353 #define hex_p(c)	(hex_value (c) != _hex_bad)
354 /* If you change this, note well: Some code relies on side effects in
355    the argument being performed exactly once.  */
356 #define hex_value(c)	((unsigned int) _hex_value[(unsigned char) (c)])
357 
358 /* Flags for pex_init.  These are bits to be or'ed together.  */
359 
360 /* Record subprocess times, if possible.  */
361 #define PEX_RECORD_TIMES	0x1
362 
363 /* Use pipes for communication between processes, if possible.  */
364 #define PEX_USE_PIPES		0x2
365 
366 /* Save files used for communication between processes.  */
367 #define PEX_SAVE_TEMPS		0x4
368 
369 /* Prepare to execute one or more programs, with standard output of
370    each program fed to standard input of the next.
371    FLAGS	As above.
372    PNAME	The name of the program to report in error messages.
373    TEMPBASE	A base name to use for temporary files; may be NULL to
374    		use a random name.
375    Returns NULL on error.  */
376 
377 extern struct pex_obj *pex_init (int flags, const char *pname,
378 				 const char *tempbase);
379 
380 /* Flags for pex_run.  These are bits to be or'ed together.  */
381 
382 /* Last program in pipeline.  Standard output of program goes to
383    OUTNAME, or, if OUTNAME is NULL, to standard output of caller.  Do
384    not set this if you want to call pex_read_output.  After this is
385    set, pex_run may no longer be called with the same struct
386    pex_obj.  */
387 #define PEX_LAST		0x1
388 
389 /* Search for program in executable search path.  */
390 #define PEX_SEARCH		0x2
391 
392 /* OUTNAME is a suffix.  */
393 #define PEX_SUFFIX		0x4
394 
395 /* Send program's standard error to standard output.  */
396 #define PEX_STDERR_TO_STDOUT	0x8
397 
398 /* Input file should be opened in binary mode.  This flag is ignored
399    on Unix.  */
400 #define PEX_BINARY_INPUT	0x10
401 
402 /* Output file should be opened in binary mode.  This flag is ignored
403    on Unix.  For proper behaviour PEX_BINARY_INPUT and
404    PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
405    PEX_BINARY_OUTPUT should be followed by a call using
406    PEX_BINARY_INPUT.  */
407 #define PEX_BINARY_OUTPUT	0x20
408 
409 /* Execute one program.  Returns NULL on success.  On error returns an
410    error string (typically just the name of a system call); the error
411    string is statically allocated.
412 
413    OBJ		Returned by pex_init.
414 
415    FLAGS	As above.
416 
417    EXECUTABLE	The program to execute.
418 
419    ARGV		NULL terminated array of arguments to pass to the program.
420 
421    OUTNAME	Sets the output file name as follows:
422 
423 		PEX_SUFFIX set (OUTNAME may not be NULL):
424 		  TEMPBASE parameter to pex_init not NULL:
425 		    Output file name is the concatenation of TEMPBASE
426 		    and OUTNAME.
427 		  TEMPBASE is NULL:
428 		    Output file name is a random file name ending in
429 		    OUTNAME.
430 		PEX_SUFFIX not set:
431 		  OUTNAME not NULL:
432 		    Output file name is OUTNAME.
433 		  OUTNAME NULL, TEMPBASE not NULL:
434 		    Output file name is randomly chosen using
435 		    TEMPBASE.
436 		  OUTNAME NULL, TEMPBASE NULL:
437 		    Output file name is randomly chosen.
438 
439 		If PEX_LAST is not set, the output file name is the
440    		name to use for a temporary file holding stdout, if
441    		any (there will not be a file if PEX_USE_PIPES is set
442    		and the system supports pipes).  If a file is used, it
443    		will be removed when no longer needed unless
444    		PEX_SAVE_TEMPS is set.
445 
446 		If PEX_LAST is set, and OUTNAME is not NULL, standard
447    		output is written to the output file name.  The file
448    		will not be removed.  If PEX_LAST and PEX_SUFFIX are
449    		both set, TEMPBASE may not be NULL.
450 
451    ERRNAME	If not NULL, this is the name of a file to which
452 		standard error is written.  If NULL, standard error of
453 		the program is standard error of the caller.
454 
455    ERR		On an error return, *ERR is set to an errno value, or
456    		to 0 if there is no relevant errno.
457 */
458 
459 extern const char *pex_run (struct pex_obj *obj, int flags,
460 			    const char *executable, char * const *argv,
461 			    const char *outname, const char *errname,
462 			    int *err);
463 
464 /* As for pex_run (), but takes an extra parameter to enable the
465    environment for the child process to be specified.
466 
467    ENV		The environment for the child process, specified as
468 		an array of character pointers.  Each element of the
469 		array should point to a string of the form VAR=VALUE,
470                 with the exception of the last element which must be
471                 a null pointer.
472 */
473 
474 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
475 			                   const char *executable,
476                                            char * const *argv,
477                                            char * const *env,
478               	          		   const char *outname,
479 					   const char *errname, int *err);
480 
481 /* Return a stream for a temporary file to pass to the first program
482    in the pipeline as input.  The file name is chosen as for pex_run.
483    pex_run closes the file automatically; don't close it yourself.  */
484 
485 extern FILE *pex_input_file (struct pex_obj *obj, int flags,
486                              const char *in_name);
487 
488 /* Return a stream for a pipe connected to the standard input of the
489    first program in the pipeline.  You must have passed
490    `PEX_USE_PIPES' to `pex_init'.  Close the returned stream
491    yourself.  */
492 
493 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
494 
495 /* Read the standard output of the last program to be executed.
496    pex_run can not be called after this.  BINARY should be non-zero if
497    the file should be opened in binary mode; this is ignored on Unix.
498    Returns NULL on error.  Don't call fclose on the returned FILE; it
499    will be closed by pex_free.  */
500 
501 extern FILE *pex_read_output (struct pex_obj *, int binary);
502 
503 /* Return exit status of all programs in VECTOR.  COUNT indicates the
504    size of VECTOR.  The status codes in the vector are in the order of
505    the calls to pex_run.  Returns 0 on error, 1 on success.  */
506 
507 extern int pex_get_status (struct pex_obj *, int count, int *vector);
508 
509 /* Return times of all programs in VECTOR.  COUNT indicates the size
510    of VECTOR.  struct pex_time is really just struct timeval, but that
511    is not portable to all systems.  Returns 0 on error, 1 on
512    success.  */
513 
514 struct pex_time
515 {
516   unsigned long user_seconds;
517   unsigned long user_microseconds;
518   unsigned long system_seconds;
519   unsigned long system_microseconds;
520 };
521 
522 extern int pex_get_times (struct pex_obj *, int count,
523 			  struct pex_time *vector);
524 
525 /* Clean up a pex_obj.  */
526 
527 extern void pex_free (struct pex_obj *);
528 
529 /* Just execute one program.  Return value is as for pex_run.
530    FLAGS	Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
531    EXECUTABLE	As for pex_run.
532    ARGV		As for pex_run.
533    PNAME	As for pex_init.
534    OUTNAME	As for pex_run when PEX_LAST is set.
535    ERRNAME	As for pex_run.
536    STATUS	Set to exit status on success.
537    ERR		As for pex_run.
538 */
539 
540 extern const char *pex_one (int flags, const char *executable,
541 			    char * const *argv, const char *pname,
542 			    const char *outname, const char *errname,
543 			    int *status, int *err);
544 
545 /* pexecute and pwait are the old pexecute interface, still here for
546    backward compatibility.  Don't use these for new code.  Instead,
547    use pex_init/pex_run/pex_get_status/pex_free, or pex_one.  */
548 
549 /* Definitions used by the pexecute routine.  */
550 
551 #define PEXECUTE_FIRST   1
552 #define PEXECUTE_LAST    2
553 #define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
554 #define PEXECUTE_SEARCH  4
555 #define PEXECUTE_VERBOSE 8
556 
557 /* Execute a program.  */
558 
559 extern int pexecute (const char *, char * const *, const char *,
560                      const char *, char **, char **, int);
561 
562 /* Wait for pexecute to finish.  */
563 
564 extern int pwait (int, int *, int);
565 
566 #if !HAVE_DECL_ASPRINTF
567 /* Like sprintf but provides a pointer to malloc'd storage, which must
568    be freed by the caller.  */
569 
570 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
571 #endif
572 
573 #if !HAVE_DECL_VASPRINTF
574 /* Like vsprintf but provides a pointer to malloc'd storage, which
575    must be freed by the caller.  */
576 
577 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
578 #endif
579 
580 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
581 /* Like sprintf but prints at most N characters.  */
582 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
583 #endif
584 
585 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
586 /* Like vsprintf but prints at most N characters.  */
587 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
588 #endif
589 
590 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
591 /* Compare version strings.  */
592 extern int strverscmp (const char *, const char *);
593 #endif
594 
595 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
596 
597 /* Drastically simplified alloca configurator.  If we're using GCC,
598    we use __builtin_alloca; otherwise we use the C alloca.  The C
599    alloca is always available.  You can override GCC by defining
600    USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
601    also set/unset as it is often used to indicate whether code needs
602    to call alloca(0).  */
603 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
604 #undef alloca
605 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
606 # define alloca(x) __builtin_alloca(x)
607 # undef C_ALLOCA
608 # define ASTRDUP(X) \
609   (__extension__ ({ const char *const libiberty_optr = (X); \
610    const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
611    char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
612    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
613 #else
614 # define alloca(x) C_alloca(x)
615 # undef USE_C_ALLOCA
616 # define USE_C_ALLOCA 1
617 # undef C_ALLOCA
618 # define C_ALLOCA 1
619 extern const char *libiberty_optr;
620 extern char *libiberty_nptr;
621 extern unsigned long libiberty_len;
622 # define ASTRDUP(X) \
623   (libiberty_optr = (X), \
624    libiberty_len = strlen (libiberty_optr) + 1, \
625    libiberty_nptr = (char *) alloca (libiberty_len), \
626    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
627 #endif
628 
629 #ifdef __cplusplus
630 }
631 #endif
632 
633 
634 #endif /* ! defined (LIBIBERTY_H) */
635