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[official-gcc.git] / include / libiberty.h
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1 /* Function declarations for libiberty.
3 Copyright (C) 1997-2017 Free Software Foundation, Inc.
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.
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.
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.
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.
27 Written by Cygnus Support, 1994.
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. */
35 #ifndef LIBIBERTY_H
36 #define LIBIBERTY_H
38 #ifdef __cplusplus
39 extern "C" {
40 #endif
42 #include "ansidecl.h"
44 /* Get a definition for size_t. */
45 #include <stddef.h>
46 /* Get a definition for va_list. */
47 #include <stdarg.h>
49 #include <stdio.h>
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. */
55 extern void unlock_stream (FILE *);
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. */
61 extern void unlock_std_streams (void);
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. */
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 *);
71 /* Build an argument vector from a string. Allocates memory using
72 malloc. Use freeargv to free the vector. */
74 extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
76 /* Free a vector returned by buildargv. */
78 extern void freeargv (char **);
80 /* Duplicate an argument vector. Allocates memory using malloc. Use
81 freeargv to free the vector. */
83 extern char **dupargv (char * const *) ATTRIBUTE_MALLOC;
85 /* Expand "@file" arguments in argv. */
87 extern void expandargv (int *, char ***);
89 /* Write argv to an @-file, inserting necessary quoting. */
91 extern int writeargv (char * const *, FILE *);
93 /* Return the number of elements in argv. */
95 extern int countargv (char * const *);
97 /* Return the last component of a path name. Note that we can't use a
98 prototype here because the parameter is declared inconsistently
99 across different systems, sometimes as "char *" and sometimes as
100 "const char *" */
102 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is
103 undefined, we haven't run the autoconf check so provide the
104 declaration without arguments. If it is 0, we checked and failed
105 to find the declaration so provide a fully prototyped one. If it
106 is 1, we found it so don't provide any declaration at all. */
107 #if !HAVE_DECL_BASENAME
108 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) \
109 || defined (__FreeBSD__) || defined (__OpenBSD__) || defined (__NetBSD__) \
110 || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) \
111 || defined (__DragonFly__) || defined (HAVE_DECL_BASENAME)
112 extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
113 #else
114 /* Do not allow basename to be used if there is no prototype seen. We
115 either need to use the above prototype or have one from
116 autoconf which would result in HAVE_DECL_BASENAME being set. */
117 #define basename basename_cannot_be_used_without_a_prototype
118 #endif
119 #endif
121 /* A well-defined basename () that is always compiled in. */
123 extern const char *lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
125 /* Same, but assumes DOS semantics (drive name, backslash is also a
126 dir separator) regardless of host. */
128 extern const char *dos_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
130 /* Same, but assumes Unix semantics (absolute paths always start with
131 a slash, only forward slash is accepted as dir separator)
132 regardless of host. */
134 extern const char *unix_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
136 /* A well-defined realpath () that is always compiled in. */
138 extern char *lrealpath (const char *);
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. */
144 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
146 /* Concatenate an arbitrary number of strings. You must pass NULL as
147 the last argument of this function, to terminate the list of
148 strings. Allocates memory using xmalloc. The first argument is
149 not one of the strings to be concatenated, but if not NULL is a
150 pointer to be freed after the new string is created, similar to the
151 way xrealloc works. */
153 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
155 /* Determine the length of concatenating an arbitrary number of
156 strings. You must pass NULL as the last argument of this function,
157 to terminate the list of strings. */
159 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
161 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
162 memory. You must pass NULL as the last argument of this function,
163 to terminate the list of strings. The supplied memory is assumed
164 to be large enough. */
166 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;
168 /* Concatenate an arbitrary number of strings into a GLOBAL area of
169 memory. You must pass NULL as the last argument of this function,
170 to terminate the list of strings. The supplied memory is assumed
171 to be large enough. */
173 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
175 /* This is the global area used by concat_copy2. */
177 extern char *libiberty_concat_ptr;
179 /* Concatenate an arbitrary number of strings. You must pass NULL as
180 the last argument of this function, to terminate the list of
181 strings. Allocates memory using alloca. The arguments are
182 evaluated twice! */
183 #define ACONCAT(ACONCAT_PARAMS) \
184 (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
185 concat_copy2 ACONCAT_PARAMS)
187 /* Check whether two file descriptors refer to the same file. */
189 extern int fdmatch (int fd1, int fd2);
191 /* Return the position of the first bit set in the argument. */
192 /* Prototypes vary from system to system, so we only provide a
193 prototype on systems where we know that we need it. */
194 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
195 extern int ffs(int);
196 #endif
198 /* Get the working directory. The result is cached, so don't call
199 chdir() between calls to getpwd(). */
201 extern char * getpwd (void);
203 /* Get the current time. */
204 /* Prototypes vary from system to system, so we only provide a
205 prototype on systems where we know that we need it. */
206 #ifdef __MINGW32__
207 /* Forward declaration to avoid #include <sys/time.h>. */
208 struct timeval;
209 extern int gettimeofday (struct timeval *, void *);
210 #endif
212 /* Get the amount of time the process has run, in microseconds. */
214 extern long get_run_time (void);
216 /* Generate a relocated path to some installation directory. Allocates
217 return value using malloc. */
219 extern char *make_relative_prefix (const char *, const char *,
220 const char *) ATTRIBUTE_MALLOC;
222 /* Generate a relocated path to some installation directory without
223 attempting to follow any soft links. Allocates
224 return value using malloc. */
226 extern char *make_relative_prefix_ignore_links (const char *, const char *,
227 const char *) ATTRIBUTE_MALLOC;
229 /* Returns a pointer to a directory path suitable for creating temporary
230 files in. */
232 extern const char *choose_tmpdir (void) ATTRIBUTE_RETURNS_NONNULL;
234 /* Choose a temporary directory to use for scratch files. */
236 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
238 /* Return a temporary file name or NULL if unable to create one. */
240 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
242 /* Remove a link to a file unless it is special. */
244 extern int unlink_if_ordinary (const char *);
246 /* Allocate memory filled with spaces. Allocates using malloc. */
248 extern const char *spaces (int count);
250 /* Return the maximum error number for which strerror will return a
251 string. */
253 extern int errno_max (void);
255 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
256 "EINVAL"). */
258 extern const char *strerrno (int);
260 /* Given the name of an errno value, return the value. */
262 extern int strtoerrno (const char *);
264 /* ANSI's strerror(), but more robust. */
266 extern char *xstrerror (int) ATTRIBUTE_RETURNS_NONNULL;
268 /* Return the maximum signal number for which strsignal will return a
269 string. */
271 extern int signo_max (void);
273 /* Return a signal message string for a signal number
274 (e.g., strsignal (SIGHUP) returns something like "Hangup"). */
275 /* This is commented out as it can conflict with one in system headers.
276 We still document its existence though. */
278 /*extern const char *strsignal (int);*/
280 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
281 "SIGHUP"). */
283 extern const char *strsigno (int);
285 /* Given the name of a signal, return its number. */
287 extern int strtosigno (const char *);
289 /* Register a function to be run by xexit. Returns 0 on success. */
291 extern int xatexit (void (*fn) (void));
293 /* Exit, calling all the functions registered with xatexit. */
295 extern void xexit (int status) ATTRIBUTE_NORETURN;
297 /* Set the program name used by xmalloc. */
299 extern void xmalloc_set_program_name (const char *);
301 /* Report an allocation failure. */
302 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
304 /* Allocate memory without fail. If malloc fails, this will print a
305 message to stderr (using the name set by xmalloc_set_program_name,
306 if any) and then call xexit. */
308 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
310 /* Reallocate memory without fail. This works like xmalloc. Note,
311 realloc type functions are not suitable for attribute malloc since
312 they may return the same address across multiple calls. */
314 extern void *xrealloc (void *, size_t) ATTRIBUTE_RETURNS_NONNULL;
316 /* Allocate memory without fail and set it to zero. This works like
317 xmalloc. */
319 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
321 /* Copy a string into a memory buffer without fail. */
323 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
325 /* Copy at most N characters from string into a buffer without fail. */
327 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
329 /* Copy an existing memory buffer to a new memory buffer without fail. */
331 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
333 /* Physical memory routines. Return values are in BYTES. */
334 extern double physmem_total (void);
335 extern double physmem_available (void);
337 /* Compute the 32-bit CRC of a block of memory. */
338 extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
340 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
341 with nice encapsulation. The XDELETE*() macros are technically
342 superfluous, but provided here for symmetry. Using them consistently
343 makes it easier to update client code to use different allocators such
344 as new/delete and new[]/delete[]. */
346 /* Scalar allocators. */
348 #define XALLOCA(T) ((T *) alloca (sizeof (T)))
349 #define XNEW(T) ((T *) xmalloc (sizeof (T)))
350 #define XCNEW(T) ((T *) xcalloc (1, sizeof (T)))
351 #define XDUP(T, P) ((T *) xmemdup ((P), sizeof (T), sizeof (T)))
352 #define XDELETE(P) free ((void*) (P))
354 /* Array allocators. */
356 #define XALLOCAVEC(T, N) ((T *) alloca (sizeof (T) * (N)))
357 #define XNEWVEC(T, N) ((T *) xmalloc (sizeof (T) * (N)))
358 #define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T)))
359 #define XDUPVEC(T, P, N) ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N)))
360 #define XRESIZEVEC(T, P, N) ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
361 #define XDELETEVEC(P) free ((void*) (P))
363 /* Allocators for variable-sized structures and raw buffers. */
365 #define XALLOCAVAR(T, S) ((T *) alloca ((S)))
366 #define XNEWVAR(T, S) ((T *) xmalloc ((S)))
367 #define XCNEWVAR(T, S) ((T *) xcalloc (1, (S)))
368 #define XDUPVAR(T, P, S1, S2) ((T *) xmemdup ((P), (S1), (S2)))
369 #define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S)))
371 /* Type-safe obstack allocator. */
373 #define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T)))
374 #define XOBNEWVEC(O, T, N) ((T *) obstack_alloc ((O), sizeof (T) * (N)))
375 #define XOBNEWVAR(O, T, S) ((T *) obstack_alloc ((O), (S)))
376 #define XOBFINISH(O, T) ((T) obstack_finish ((O)))
378 /* hex character manipulation routines */
380 #define _hex_array_size 256
381 #define _hex_bad 99
382 extern const unsigned char _hex_value[_hex_array_size];
383 extern void hex_init (void);
384 #define hex_p(c) (hex_value (c) != _hex_bad)
385 /* If you change this, note well: Some code relies on side effects in
386 the argument being performed exactly once. */
387 #define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)])
389 /* Flags for pex_init. These are bits to be or'ed together. */
391 /* Record subprocess times, if possible. */
392 #define PEX_RECORD_TIMES 0x1
394 /* Use pipes for communication between processes, if possible. */
395 #define PEX_USE_PIPES 0x2
397 /* Save files used for communication between processes. */
398 #define PEX_SAVE_TEMPS 0x4
400 /* Max number of alloca bytes per call before we must switch to malloc.
402 ?? Swiped from gnulib's regex_internal.h header. Is this actually
403 the case? This number seems arbitrary, though sane.
405 The OS usually guarantees only one guard page at the bottom of the stack,
406 and a page size can be as small as 4096 bytes. So we cannot safely
407 allocate anything larger than 4096 bytes. Also care for the possibility
408 of a few compiler-allocated temporary stack slots. */
409 #define MAX_ALLOCA_SIZE 4032
411 /* Prepare to execute one or more programs, with standard output of
412 each program fed to standard input of the next.
413 FLAGS As above.
414 PNAME The name of the program to report in error messages.
415 TEMPBASE A base name to use for temporary files; may be NULL to
416 use a random name.
417 Returns NULL on error. */
419 extern struct pex_obj *pex_init (int flags, const char *pname,
420 const char *tempbase) ATTRIBUTE_RETURNS_NONNULL;
422 /* Flags for pex_run. These are bits to be or'ed together. */
424 /* Last program in pipeline. Standard output of program goes to
425 OUTNAME, or, if OUTNAME is NULL, to standard output of caller. Do
426 not set this if you want to call pex_read_output. After this is
427 set, pex_run may no longer be called with the same struct
428 pex_obj. */
429 #define PEX_LAST 0x1
431 /* Search for program in executable search path. */
432 #define PEX_SEARCH 0x2
434 /* OUTNAME is a suffix. */
435 #define PEX_SUFFIX 0x4
437 /* Send program's standard error to standard output. */
438 #define PEX_STDERR_TO_STDOUT 0x8
440 /* Input file should be opened in binary mode. This flag is ignored
441 on Unix. */
442 #define PEX_BINARY_INPUT 0x10
444 /* Output file should be opened in binary mode. This flag is ignored
445 on Unix. For proper behaviour PEX_BINARY_INPUT and
446 PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
447 PEX_BINARY_OUTPUT should be followed by a call using
448 PEX_BINARY_INPUT. */
449 #define PEX_BINARY_OUTPUT 0x20
451 /* Capture stderr to a pipe. The output can be read by
452 calling pex_read_err and reading from the returned
453 FILE object. This flag may be specified only for
454 the last program in a pipeline.
456 This flag is supported only on Unix and Windows. */
457 #define PEX_STDERR_TO_PIPE 0x40
459 /* Capture stderr in binary mode. This flag is ignored
460 on Unix. */
461 #define PEX_BINARY_ERROR 0x80
463 /* Append stdout to existing file instead of truncating it. */
464 #define PEX_STDOUT_APPEND 0x100
466 /* Thes same as PEX_STDOUT_APPEND, but for STDERR. */
467 #define PEX_STDERR_APPEND 0x200
469 /* Execute one program. Returns NULL on success. On error returns an
470 error string (typically just the name of a system call); the error
471 string is statically allocated.
473 OBJ Returned by pex_init.
475 FLAGS As above.
477 EXECUTABLE The program to execute.
479 ARGV NULL terminated array of arguments to pass to the program.
481 OUTNAME Sets the output file name as follows:
483 PEX_SUFFIX set (OUTNAME may not be NULL):
484 TEMPBASE parameter to pex_init not NULL:
485 Output file name is the concatenation of TEMPBASE
486 and OUTNAME.
487 TEMPBASE is NULL:
488 Output file name is a random file name ending in
489 OUTNAME.
490 PEX_SUFFIX not set:
491 OUTNAME not NULL:
492 Output file name is OUTNAME.
493 OUTNAME NULL, TEMPBASE not NULL:
494 Output file name is randomly chosen using
495 TEMPBASE.
496 OUTNAME NULL, TEMPBASE NULL:
497 Output file name is randomly chosen.
499 If PEX_LAST is not set, the output file name is the
500 name to use for a temporary file holding stdout, if
501 any (there will not be a file if PEX_USE_PIPES is set
502 and the system supports pipes). If a file is used, it
503 will be removed when no longer needed unless
504 PEX_SAVE_TEMPS is set.
506 If PEX_LAST is set, and OUTNAME is not NULL, standard
507 output is written to the output file name. The file
508 will not be removed. If PEX_LAST and PEX_SUFFIX are
509 both set, TEMPBASE may not be NULL.
511 ERRNAME If not NULL, this is the name of a file to which
512 standard error is written. If NULL, standard error of
513 the program is standard error of the caller.
515 ERR On an error return, *ERR is set to an errno value, or
516 to 0 if there is no relevant errno.
519 extern const char *pex_run (struct pex_obj *obj, int flags,
520 const char *executable, char * const *argv,
521 const char *outname, const char *errname,
522 int *err);
524 /* As for pex_run (), but takes an extra parameter to enable the
525 environment for the child process to be specified.
527 ENV The environment for the child process, specified as
528 an array of character pointers. Each element of the
529 array should point to a string of the form VAR=VALUE,
530 with the exception of the last element which must be
531 a null pointer.
534 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
535 const char *executable,
536 char * const *argv,
537 char * const *env,
538 const char *outname,
539 const char *errname, int *err);
541 /* Return a stream for a temporary file to pass to the first program
542 in the pipeline as input. The file name is chosen as for pex_run.
543 pex_run closes the file automatically; don't close it yourself. */
545 extern FILE *pex_input_file (struct pex_obj *obj, int flags,
546 const char *in_name);
548 /* Return a stream for a pipe connected to the standard input of the
549 first program in the pipeline. You must have passed
550 `PEX_USE_PIPES' to `pex_init'. Close the returned stream
551 yourself. */
553 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
555 /* Read the standard output of the last program to be executed.
556 pex_run can not be called after this. BINARY should be non-zero if
557 the file should be opened in binary mode; this is ignored on Unix.
558 Returns NULL on error. Don't call fclose on the returned FILE; it
559 will be closed by pex_free. */
561 extern FILE *pex_read_output (struct pex_obj *, int binary);
563 /* Read the standard error of the last program to be executed.
564 pex_run can not be called after this. BINARY should be non-zero if
565 the file should be opened in binary mode; this is ignored on Unix.
566 Returns NULL on error. Don't call fclose on the returned FILE; it
567 will be closed by pex_free. */
569 extern FILE *pex_read_err (struct pex_obj *, int binary);
571 /* Return exit status of all programs in VECTOR. COUNT indicates the
572 size of VECTOR. The status codes in the vector are in the order of
573 the calls to pex_run. Returns 0 on error, 1 on success. */
575 extern int pex_get_status (struct pex_obj *, int count, int *vector);
577 /* Return times of all programs in VECTOR. COUNT indicates the size
578 of VECTOR. struct pex_time is really just struct timeval, but that
579 is not portable to all systems. Returns 0 on error, 1 on
580 success. */
582 struct pex_time
584 unsigned long user_seconds;
585 unsigned long user_microseconds;
586 unsigned long system_seconds;
587 unsigned long system_microseconds;
590 extern int pex_get_times (struct pex_obj *, int count,
591 struct pex_time *vector);
593 /* Clean up a pex_obj. If you have not called pex_get_times or
594 pex_get_status, this will try to kill the subprocesses. */
596 extern void pex_free (struct pex_obj *);
598 /* Just execute one program. Return value is as for pex_run.
599 FLAGS Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
600 EXECUTABLE As for pex_run.
601 ARGV As for pex_run.
602 PNAME As for pex_init.
603 OUTNAME As for pex_run when PEX_LAST is set.
604 ERRNAME As for pex_run.
605 STATUS Set to exit status on success.
606 ERR As for pex_run.
609 extern const char *pex_one (int flags, const char *executable,
610 char * const *argv, const char *pname,
611 const char *outname, const char *errname,
612 int *status, int *err);
614 /* pexecute and pwait are the old pexecute interface, still here for
615 backward compatibility. Don't use these for new code. Instead,
616 use pex_init/pex_run/pex_get_status/pex_free, or pex_one. */
618 /* Definitions used by the pexecute routine. */
620 #define PEXECUTE_FIRST 1
621 #define PEXECUTE_LAST 2
622 #define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST)
623 #define PEXECUTE_SEARCH 4
624 #define PEXECUTE_VERBOSE 8
626 /* Execute a program. */
628 extern int pexecute (const char *, char * const *, const char *,
629 const char *, char **, char **, int);
631 /* Wait for pexecute to finish. */
633 extern int pwait (int, int *, int);
635 #if defined(HAVE_DECL_ASPRINTF) && !HAVE_DECL_ASPRINTF
636 /* Like sprintf but provides a pointer to malloc'd storage, which must
637 be freed by the caller. */
639 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
640 #endif
642 /* Like asprintf but allocates memory without fail. This works like
643 xmalloc. */
645 extern char *xasprintf (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF_1;
647 #if !HAVE_DECL_VASPRINTF
648 /* Like vsprintf but provides a pointer to malloc'd storage, which
649 must be freed by the caller. */
651 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
652 #endif
654 /* Like vasprintf but allocates memory without fail. This works like
655 xmalloc. */
657 extern char *xvasprintf (const char *, va_list) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF(1,0);
659 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
660 /* Like sprintf but prints at most N characters. */
661 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
662 #endif
664 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
665 /* Like vsprintf but prints at most N characters. */
666 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
667 #endif
669 #if defined (HAVE_DECL_STRNLEN) && !HAVE_DECL_STRNLEN
670 extern size_t strnlen (const char *, size_t);
671 #endif
673 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
674 /* Compare version strings. */
675 extern int strverscmp (const char *, const char *);
676 #endif
678 #if defined(HAVE_DECL_STRTOL) && !HAVE_DECL_STRTOL
679 extern long int strtol (const char *nptr,
680 char **endptr, int base);
681 #endif
683 #if defined(HAVE_DECL_STRTOUL) && !HAVE_DECL_STRTOUL
684 extern unsigned long int strtoul (const char *nptr,
685 char **endptr, int base);
686 #endif
688 #if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOLL) && !HAVE_DECL_STRTOLL
689 __extension__
690 extern long long int strtoll (const char *nptr,
691 char **endptr, int base);
692 #endif
694 #if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOULL) && !HAVE_DECL_STRTOULL
695 __extension__
696 extern unsigned long long int strtoull (const char *nptr,
697 char **endptr, int base);
698 #endif
700 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
701 /* Compare version strings. */
702 extern int strverscmp (const char *, const char *);
703 #endif
705 /* Set the title of a process */
706 extern void setproctitle (const char *name, ...);
708 /* Increase stack limit if possible. */
709 extern void stack_limit_increase (unsigned long);
711 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
713 /* Drastically simplified alloca configurator. If we're using GCC,
714 we use __builtin_alloca; otherwise we use the C alloca. The C
715 alloca is always available. You can override GCC by defining
716 USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
717 also set/unset as it is often used to indicate whether code needs
718 to call alloca(0). */
719 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
720 #undef alloca
721 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
722 # define alloca(x) __builtin_alloca(x)
723 # undef C_ALLOCA
724 # define ASTRDUP(X) \
725 (__extension__ ({ const char *const libiberty_optr = (X); \
726 const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
727 char *const libiberty_nptr = (char *) alloca (libiberty_len); \
728 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
729 #else
730 # define alloca(x) C_alloca(x)
731 # undef USE_C_ALLOCA
732 # define USE_C_ALLOCA 1
733 # undef C_ALLOCA
734 # define C_ALLOCA 1
735 extern const char *libiberty_optr;
736 extern char *libiberty_nptr;
737 extern unsigned long libiberty_len;
738 # define ASTRDUP(X) \
739 (libiberty_optr = (X), \
740 libiberty_len = strlen (libiberty_optr) + 1, \
741 libiberty_nptr = (char *) alloca (libiberty_len), \
742 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
743 #endif
745 #ifdef __cplusplus
747 #endif
750 #endif /* ! defined (LIBIBERTY_H) */