1 /* Function declarations for libiberty.
3 Copyright 2001, 2002, 2005 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)
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., 59 Temple Place - Suite 330,
25 Boston, MA 02111-1307, 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. */
44 /* Get a definition for size_t. */
46 /* Get a definition for va_list. */
51 /* Build an argument vector from a string. Allocates memory using
52 malloc. Use freeargv to free the vector. */
54 extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
56 /* Free a vector returned by buildargv. */
58 extern void freeargv (char **);
60 /* Duplicate an argument vector. Allocates memory using malloc. Use
61 freeargv to free the vector. */
63 extern char **dupargv (char **) ATTRIBUTE_MALLOC;
66 /* Return the last component of a path name. Note that we can't use a
67 prototype here because the parameter is declared inconsistently
68 across different systems, sometimes as "char *" and sometimes as
71 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is
72 undefined, we haven't run the autoconf check so provide the
73 declaration without arguments. If it is 0, we checked and failed
74 to find the declaration so provide a fully prototyped one. If it
75 is 1, we found it so don't provide any declaration at all. */
76 #if !HAVE_DECL_BASENAME
77 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME)
78 extern char *basename (const char *);
80 extern char *basename ();
84 /* A well-defined basename () that is always compiled in. */
86 extern const char *lbasename (const char *);
88 /* A well-defined realpath () that is always compiled in. */
90 extern char *lrealpath (const char *);
92 /* Concatenate an arbitrary number of strings. You must pass NULL as
93 the last argument of this function, to terminate the list of
94 strings. Allocates memory using xmalloc. */
96 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
98 /* Concatenate an arbitrary number of strings. You must pass NULL as
99 the last argument of this function, to terminate the list of
100 strings. Allocates memory using xmalloc. The first argument is
101 not one of the strings to be concatenated, but if not NULL is a
102 pointer to be freed after the new string is created, similar to the
103 way xrealloc works. */
105 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
107 /* Determine the length of concatenating an arbitrary number of
108 strings. You must pass NULL as the last argument of this function,
109 to terminate the list of strings. */
111 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
113 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
114 memory. You must pass NULL as the last argument of this function,
115 to terminate the list of strings. The supplied memory is assumed
116 to be large enough. */
118 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL;
120 /* Concatenate an arbitrary number of strings into a GLOBAL area of
121 memory. You must pass NULL as the last argument of this function,
122 to terminate the list of strings. The supplied memory is assumed
123 to be large enough. */
125 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL;
127 /* This is the global area used by concat_copy2. */
129 extern char *libiberty_concat_ptr;
131 /* Concatenate an arbitrary number of strings. You must pass NULL as
132 the last argument of this function, to terminate the list of
133 strings. Allocates memory using alloca. The arguments are
135 #define ACONCAT(ACONCAT_PARAMS) \
136 (libiberty_concat_ptr = alloca (concat_length ACONCAT_PARAMS + 1), \
137 concat_copy2 ACONCAT_PARAMS)
139 /* Check whether two file descriptors refer to the same file. */
141 extern int fdmatch (int fd1, int fd2);
143 /* Return the position of the first bit set in the argument. */
144 /* Prototypes vary from system to system, so we only provide a
145 prototype on systems where we know that we need it. */
146 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
150 /* Get the working directory. The result is cached, so don't call
151 chdir() between calls to getpwd(). */
153 extern char * getpwd (void);
155 /* Get the current time. */
156 /* Prototypes vary from system to system, so we only provide a
157 prototype on systems where we know that we need it. */
159 /* Forward declaration to avoid #include <sys/time.h>. */
161 extern int gettimeofday (struct timeval *, void *);
164 /* Get the amount of time the process has run, in microseconds. */
166 extern long get_run_time (void);
168 /* Generate a relocated path to some installation directory. Allocates
169 return value using malloc. */
171 extern char *make_relative_prefix (const char *, const char *,
172 const char *) ATTRIBUTE_MALLOC;
174 /* Choose a temporary directory to use for scratch files. */
176 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC;
178 /* Return a temporary file name or NULL if unable to create one. */
180 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
182 /* Remove a link to a file unless it is special. */
184 extern int unlink_if_ordinary (const char *);
186 /* Allocate memory filled with spaces. Allocates using malloc. */
188 extern const char *spaces (int count);
190 /* Return the maximum error number for which strerror will return a
193 extern int errno_max (void);
195 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
198 extern const char *strerrno (int);
200 /* Given the name of an errno value, return the value. */
202 extern int strtoerrno (const char *);
204 /* ANSI's strerror(), but more robust. */
206 extern char *xstrerror (int);
208 /* Return the maximum signal number for which strsignal will return a
211 extern int signo_max (void);
213 /* Return a signal message string for a signal number
214 (e.g., strsignal (SIGHUP) returns something like "Hangup"). */
215 /* This is commented out as it can conflict with one in system headers.
216 We still document its existence though. */
218 /*extern const char *strsignal (int);*/
220 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
223 extern const char *strsigno (int);
225 /* Given the name of a signal, return its number. */
227 extern int strtosigno (const char *);
229 /* Register a function to be run by xexit. Returns 0 on success. */
231 extern int xatexit (void (*fn) (void));
233 /* Exit, calling all the functions registered with xatexit. */
235 extern void xexit (int status) ATTRIBUTE_NORETURN;
237 /* Set the program name used by xmalloc. */
239 extern void xmalloc_set_program_name (const char *);
241 /* Report an allocation failure. */
242 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
244 /* Allocate memory without fail. If malloc fails, this will print a
245 message to stderr (using the name set by xmalloc_set_program_name,
246 if any) and then call xexit. */
248 extern PTR xmalloc (size_t) ATTRIBUTE_MALLOC;
250 /* Reallocate memory without fail. This works like xmalloc. Note,
251 realloc type functions are not suitable for attribute malloc since
252 they may return the same address across multiple calls. */
254 extern PTR xrealloc (PTR, size_t);
256 /* Allocate memory without fail and set it to zero. This works like
259 extern PTR xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
261 /* Copy a string into a memory buffer without fail. */
263 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
265 /* Copy at most N characters from string into a buffer without fail. */
267 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
269 /* Copy an existing memory buffer to a new memory buffer without fail. */
271 extern PTR xmemdup (const PTR, size_t, size_t) ATTRIBUTE_MALLOC;
273 /* Physical memory routines. Return values are in BYTES. */
274 extern double physmem_total (void);
275 extern double physmem_available (void);
278 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
279 with nice encapsulation. The XDELETE*() macros are technically
280 superfluous, but provided here for symmetry. Using them consistently
281 makes it easier to update client code to use different allocators such
282 as new/delete and new[]/delete[]. */
284 /* Scalar allocators. */
286 #define XNEW(T) ((T *) xmalloc (sizeof (T)))
287 #define XCNEW(T) ((T *) xcalloc (1, sizeof (T)))
288 #define XDELETE(P) free ((void*) (P))
290 /* Array allocators. */
292 #define XNEWVEC(T, N) ((T *) xmalloc (sizeof (T) * (N)))
293 #define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T)))
294 #define XRESIZEVEC(T, P, N) ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
295 #define XDELETEVEC(P) free ((void*) (P))
297 /* Allocators for variable-sized structures and raw buffers. */
299 #define XNEWVAR(T, S) ((T *) xmalloc ((S)))
300 #define XCNEWVAR(T, S) ((T *) xcalloc (1, (S)))
301 #define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S)))
303 /* Type-safe obstack allocator. */
305 #define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T)))
308 /* hex character manipulation routines */
310 #define _hex_array_size 256
312 extern const unsigned char _hex_value[_hex_array_size];
313 extern void hex_init (void);
314 #define hex_p(c) (hex_value (c) != _hex_bad)
315 /* If you change this, note well: Some code relies on side effects in
316 the argument being performed exactly once. */
317 #define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)])
319 /* Flags for pex_init. These are bits to be or'ed together. */
321 /* Record subprocess times, if possible. */
322 #define PEX_RECORD_TIMES 0x1
324 /* Use pipes for communication between processes, if possible. */
325 #define PEX_USE_PIPES 0x2
327 /* Save files used for communication between processes. */
328 #define PEX_SAVE_TEMPS 0x4
330 /* Prepare to execute one or more programs, with standard output of
331 each program fed to standard input of the next.
333 PNAME The name of the program to report in error messages.
334 TEMPBASE A base name to use for temporary files; may be NULL to
336 Returns NULL on error. */
338 extern struct pex_obj *pex_init (int flags, const char *pname,
339 const char *tempbase);
341 /* Flags for pex_run. These are bits to be or'ed together. */
343 /* Last program in pipeline. Standard output of program goes to
344 OUTNAME, or, if OUTNAME is NULL, to standard output of caller. Do
345 not set this if you want to call pex_read_output. After this is
346 set, pex_run may no longer be called with the same struct
350 /* Search for program in executable search path. */
351 #define PEX_SEARCH 0x2
353 /* OUTNAME is a suffix. */
354 #define PEX_SUFFIX 0x4
356 /* Send program's standard error to standard output. */
357 #define PEX_STDERR_TO_STDOUT 0x8
359 /* Input file should be opened in binary mode. This flag is ignored
361 #define PEX_BINARY_INPUT 0x10
363 /* Output file should be opened in binary mode. This flag is ignored
364 on Unix. For proper behaviour PEX_BINARY_INPUT and
365 PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
366 PEX_BINARY_OUTPUT should be followed by a call using
368 #define PEX_BINARY_OUTPUT 0x20
370 /* Execute one program. Returns NULL on success. On error returns an
371 error string (typically just the name of a system call); the error
372 string is statically allocated.
374 OBJ Returned by pex_init.
378 EXECUTABLE The program to execute.
380 ARGV NULL terminated array of arguments to pass to the program.
382 OUTNAME Sets the output file name as follows:
384 PEX_SUFFIX set (OUTNAME may not be NULL):
385 TEMPBASE parameter to pex_init not NULL:
386 Output file name is the concatenation of TEMPBASE
389 Output file name is a random file name ending in
393 Output file name is OUTNAME.
394 OUTNAME NULL, TEMPBASE not NULL:
395 Output file name is randomly chosen using
397 OUTNAME NULL, TEMPBASE NULL:
398 Output file name is randomly chosen.
400 If PEX_LAST is not set, the output file name is the
401 name to use for a temporary file holding stdout, if
402 any (there will not be a file if PEX_USE_PIPES is set
403 and the system supports pipes). If a file is used, it
404 will be removed when no longer needed unless
405 PEX_SAVE_TEMPS is set.
407 If PEX_LAST is set, and OUTNAME is not NULL, standard
408 output is written to the output file name. The file
409 will not be removed. If PEX_LAST and PEX_SUFFIX are
410 both set, TEMPBASE may not be NULL.
412 ERRNAME If not NULL, this is the name of a file to which
413 standard error is written. If NULL, standard error of
414 the program is standard error of the caller.
416 ERR On an error return, *ERR is set to an errno value, or
417 to 0 if there is no relevant errno.
420 extern const char *pex_run (struct pex_obj *obj, int flags,
421 const char *executable, char * const *argv,
422 const char *outname, const char *errname,
425 /* Read the standard output of the last program to be executed.
426 pex_run can not be called after this. BINARY should be non-zero if
427 the file should be opened in binary mode; this is ignored on Unix.
428 Returns NULL on error. Don't call fclose on the returned FILE; it
429 will be closed by pex_free. */
431 extern FILE *pex_read_output (struct pex_obj *, int binary);
433 /* Return exit status of all programs in VECTOR. COUNT indicates the
434 size of VECTOR. The status codes in the vector are in the order of
435 the calls to pex_run. Returns 0 on error, 1 on success. */
437 extern int pex_get_status (struct pex_obj *, int count, int *vector);
439 /* Return times of all programs in VECTOR. COUNT indicates the size
440 of VECTOR. struct pex_time is really just struct timeval, but that
441 is not portable to all systems. Returns 0 on error, 1 on
446 unsigned long user_seconds;
447 unsigned long user_microseconds;
448 unsigned long system_seconds;
449 unsigned long system_microseconds;
452 extern int pex_get_times (struct pex_obj *, int count,
453 struct pex_time *vector);
455 /* Clean up a pex_obj. */
457 extern void pex_free (struct pex_obj *);
459 /* Just execute one program. Return value is as for pex_run.
460 FLAGS Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
461 EXECUTABLE As for pex_run.
463 PNAME As for pex_init.
464 OUTNAME As for pex_run when PEX_LAST is set.
465 ERRNAME As for pex_run.
466 STATUS Set to exit status on success.
470 extern const char *pex_one (int flags, const char *executable,
471 char * const *argv, const char *pname,
472 const char *outname, const char *errname,
473 int *status, int *err);
475 /* pexecute and pwait are the old pexecute interface, still here for
476 backward compatibility. Don't use these for new code. Instead,
477 use pex_init/pex_run/pex_get_status/pex_free, or pex_one. */
479 /* Definitions used by the pexecute routine. */
481 #define PEXECUTE_FIRST 1
482 #define PEXECUTE_LAST 2
483 #define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST)
484 #define PEXECUTE_SEARCH 4
485 #define PEXECUTE_VERBOSE 8
487 /* Execute a program. */
489 extern int pexecute (const char *, char * const *, const char *,
490 const char *, char **, char **, int);
492 /* Wait for pexecute to finish. */
494 extern int pwait (int, int *, int);
496 #if !HAVE_DECL_ASPRINTF
497 /* Like sprintf but provides a pointer to malloc'd storage, which must
498 be freed by the caller. */
500 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
503 #if !HAVE_DECL_VASPRINTF
504 /* Like vsprintf but provides a pointer to malloc'd storage, which
505 must be freed by the caller. */
507 extern int vasprintf (char **, const char *, va_list)
508 ATTRIBUTE_PRINTF(2,0);
511 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
513 /* Drastically simplified alloca configurator. If we're using GCC,
514 we use __builtin_alloca; otherwise we use the C alloca. The C
515 alloca is always available. You can override GCC by defining
516 USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
517 also set/unset as it is often used to indicate whether code needs
518 to call alloca(0). */
519 extern PTR C_alloca (size_t) ATTRIBUTE_MALLOC;
521 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
522 # define alloca(x) __builtin_alloca(x)
524 # define ASTRDUP(X) \
525 (__extension__ ({ const char *const libiberty_optr = (X); \
526 const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
527 char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
528 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
530 # define alloca(x) C_alloca(x)
532 # define USE_C_ALLOCA 1
535 extern const char *libiberty_optr;
536 extern char *libiberty_nptr;
537 extern unsigned long libiberty_len;
538 # define ASTRDUP(X) \
539 (libiberty_optr = (X), \
540 libiberty_len = strlen (libiberty_optr) + 1, \
541 libiberty_nptr = (char *) alloca (libiberty_len), \
542 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
550 #endif /* ! defined (LIBIBERTY_H) */