* builtins.c (expand_builtin_int_interclass_roundingfn): New function
[official-gcc.git] / include / libiberty.h
blob27291c988681629ac25aeeff0199af1ecc25166f
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)
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 **) ATTRIBUTE_MALLOC;
85 /* Expand "@file" arguments in argv. */
87 extern void expandargv PARAMS ((int *, char ***));
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 *" */
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
110 /* A well-defined basename () that is always compiled in. */
112 extern const char *lbasename (const char *);
114 /* A well-defined realpath () that is always compiled in. */
116 extern char *lrealpath (const char *);
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. */
122 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
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. */
131 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
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. */
137 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
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. */
144 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL;
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. */
151 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL;
153 /* This is the global area used by concat_copy2. */
155 extern char *libiberty_concat_ptr;
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)
165 /* Check whether two file descriptors refer to the same file. */
167 extern int fdmatch (int fd1, int fd2);
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
176 /* Get the working directory. The result is cached, so don't call
177 chdir() between calls to getpwd(). */
179 extern char * getpwd (void);
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
190 /* Get the amount of time the process has run, in microseconds. */
192 extern long get_run_time (void);
194 /* Generate a relocated path to some installation directory. Allocates
195 return value using malloc. */
197 extern char *make_relative_prefix (const char *, const char *,
198 const char *) ATTRIBUTE_MALLOC;
200 /* Generate a relocated path to some installation directory without
201 attempting to follow any soft links. Allocates
202 return value using malloc. */
204 extern char *make_relative_prefix_ignore_links (const char *, const char *,
205 const char *) ATTRIBUTE_MALLOC;
207 /* Choose a temporary directory to use for scratch files. */
209 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC;
211 /* Return a temporary file name or NULL if unable to create one. */
213 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
215 /* Remove a link to a file unless it is special. */
217 extern int unlink_if_ordinary (const char *);
219 /* Allocate memory filled with spaces. Allocates using malloc. */
221 extern const char *spaces (int count);
223 /* Return the maximum error number for which strerror will return a
224 string. */
226 extern int errno_max (void);
228 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
229 "EINVAL"). */
231 extern const char *strerrno (int);
233 /* Given the name of an errno value, return the value. */
235 extern int strtoerrno (const char *);
237 /* ANSI's strerror(), but more robust. */
239 extern char *xstrerror (int);
241 /* Return the maximum signal number for which strsignal will return a
242 string. */
244 extern int signo_max (void);
246 /* Return a signal message string for a signal number
247 (e.g., strsignal (SIGHUP) returns something like "Hangup"). */
248 /* This is commented out as it can conflict with one in system headers.
249 We still document its existence though. */
251 /*extern const char *strsignal (int);*/
253 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
254 "SIGHUP"). */
256 extern const char *strsigno (int);
258 /* Given the name of a signal, return its number. */
260 extern int strtosigno (const char *);
262 /* Register a function to be run by xexit. Returns 0 on success. */
264 extern int xatexit (void (*fn) (void));
266 /* Exit, calling all the functions registered with xatexit. */
268 extern void xexit (int status) ATTRIBUTE_NORETURN;
270 /* Set the program name used by xmalloc. */
272 extern void xmalloc_set_program_name (const char *);
274 /* Report an allocation failure. */
275 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
277 /* Allocate memory without fail. If malloc fails, this will print a
278 message to stderr (using the name set by xmalloc_set_program_name,
279 if any) and then call xexit. */
281 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC;
283 /* Reallocate memory without fail. This works like xmalloc. Note,
284 realloc type functions are not suitable for attribute malloc since
285 they may return the same address across multiple calls. */
287 extern void *xrealloc (void *, size_t);
289 /* Allocate memory without fail and set it to zero. This works like
290 xmalloc. */
292 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
294 /* Copy a string into a memory buffer without fail. */
296 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
298 /* Copy at most N characters from string into a buffer without fail. */
300 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
302 /* Copy an existing memory buffer to a new memory buffer without fail. */
304 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC;
306 /* Physical memory routines. Return values are in BYTES. */
307 extern double physmem_total (void);
308 extern double physmem_available (void);
311 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
312 with nice encapsulation. The XDELETE*() macros are technically
313 superfluous, but provided here for symmetry. Using them consistently
314 makes it easier to update client code to use different allocators such
315 as new/delete and new[]/delete[]. */
317 /* Scalar allocators. */
319 #define XNEW(T) ((T *) xmalloc (sizeof (T)))
320 #define XCNEW(T) ((T *) xcalloc (1, sizeof (T)))
321 #define XDELETE(P) free ((void*) (P))
323 /* Array allocators. */
325 #define XNEWVEC(T, N) ((T *) xmalloc (sizeof (T) * (N)))
326 #define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T)))
327 #define XRESIZEVEC(T, P, N) ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
328 #define XDELETEVEC(P) free ((void*) (P))
330 /* Allocators for variable-sized structures and raw buffers. */
332 #define XNEWVAR(T, S) ((T *) xmalloc ((S)))
333 #define XCNEWVAR(T, S) ((T *) xcalloc (1, (S)))
334 #define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S)))
336 /* Type-safe obstack allocator. */
338 #define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T)))
339 #define XOBFINISH(O, T) ((T) obstack_finish ((O)))
341 /* hex character manipulation routines */
343 #define _hex_array_size 256
344 #define _hex_bad 99
345 extern const unsigned char _hex_value[_hex_array_size];
346 extern void hex_init (void);
347 #define hex_p(c) (hex_value (c) != _hex_bad)
348 /* If you change this, note well: Some code relies on side effects in
349 the argument being performed exactly once. */
350 #define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)])
352 /* Flags for pex_init. These are bits to be or'ed together. */
354 /* Record subprocess times, if possible. */
355 #define PEX_RECORD_TIMES 0x1
357 /* Use pipes for communication between processes, if possible. */
358 #define PEX_USE_PIPES 0x2
360 /* Save files used for communication between processes. */
361 #define PEX_SAVE_TEMPS 0x4
363 /* Prepare to execute one or more programs, with standard output of
364 each program fed to standard input of the next.
365 FLAGS As above.
366 PNAME The name of the program to report in error messages.
367 TEMPBASE A base name to use for temporary files; may be NULL to
368 use a random name.
369 Returns NULL on error. */
371 extern struct pex_obj *pex_init (int flags, const char *pname,
372 const char *tempbase);
374 /* Flags for pex_run. These are bits to be or'ed together. */
376 /* Last program in pipeline. Standard output of program goes to
377 OUTNAME, or, if OUTNAME is NULL, to standard output of caller. Do
378 not set this if you want to call pex_read_output. After this is
379 set, pex_run may no longer be called with the same struct
380 pex_obj. */
381 #define PEX_LAST 0x1
383 /* Search for program in executable search path. */
384 #define PEX_SEARCH 0x2
386 /* OUTNAME is a suffix. */
387 #define PEX_SUFFIX 0x4
389 /* Send program's standard error to standard output. */
390 #define PEX_STDERR_TO_STDOUT 0x8
392 /* Input file should be opened in binary mode. This flag is ignored
393 on Unix. */
394 #define PEX_BINARY_INPUT 0x10
396 /* Output file should be opened in binary mode. This flag is ignored
397 on Unix. For proper behaviour PEX_BINARY_INPUT and
398 PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
399 PEX_BINARY_OUTPUT should be followed by a call using
400 PEX_BINARY_INPUT. */
401 #define PEX_BINARY_OUTPUT 0x20
403 /* Execute one program. Returns NULL on success. On error returns an
404 error string (typically just the name of a system call); the error
405 string is statically allocated.
407 OBJ Returned by pex_init.
409 FLAGS As above.
411 EXECUTABLE The program to execute.
413 ARGV NULL terminated array of arguments to pass to the program.
415 OUTNAME Sets the output file name as follows:
417 PEX_SUFFIX set (OUTNAME may not be NULL):
418 TEMPBASE parameter to pex_init not NULL:
419 Output file name is the concatenation of TEMPBASE
420 and OUTNAME.
421 TEMPBASE is NULL:
422 Output file name is a random file name ending in
423 OUTNAME.
424 PEX_SUFFIX not set:
425 OUTNAME not NULL:
426 Output file name is OUTNAME.
427 OUTNAME NULL, TEMPBASE not NULL:
428 Output file name is randomly chosen using
429 TEMPBASE.
430 OUTNAME NULL, TEMPBASE NULL:
431 Output file name is randomly chosen.
433 If PEX_LAST is not set, the output file name is the
434 name to use for a temporary file holding stdout, if
435 any (there will not be a file if PEX_USE_PIPES is set
436 and the system supports pipes). If a file is used, it
437 will be removed when no longer needed unless
438 PEX_SAVE_TEMPS is set.
440 If PEX_LAST is set, and OUTNAME is not NULL, standard
441 output is written to the output file name. The file
442 will not be removed. If PEX_LAST and PEX_SUFFIX are
443 both set, TEMPBASE may not be NULL.
445 ERRNAME If not NULL, this is the name of a file to which
446 standard error is written. If NULL, standard error of
447 the program is standard error of the caller.
449 ERR On an error return, *ERR is set to an errno value, or
450 to 0 if there is no relevant errno.
453 extern const char *pex_run (struct pex_obj *obj, int flags,
454 const char *executable, char * const *argv,
455 const char *outname, const char *errname,
456 int *err);
458 /* As for pex_run (), but takes an extra parameter to enable the
459 environment for the child process to be specified.
461 ENV The environment for the child process, specified as
462 an array of character pointers. Each element of the
463 array should point to a string of the form VAR=VALUE,
464 with the exception of the last element which must be
465 a null pointer.
468 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
469 const char *executable,
470 char * const *argv,
471 char * const *env,
472 const char *outname,
473 const char *errname, int *err);
475 /* Return a `FILE' pointer FP for the standard input of the first
476 program in the pipeline; FP is opened for writing. You must have
477 passed `PEX_USE_PIPES' to the `pex_init' call that returned OBJ.
478 You must close FP yourself with `fclose' to indicate that the
479 pipeline's input is complete.
481 The file descriptor underlying FP is marked not to be inherited by
482 child processes.
484 This call is not supported on systems which do not support pipes;
485 it returns with an error. (We could implement it by writing a
486 temporary file, but then you would need to write all your data and
487 close FP before your first call to `pex_run' -- and that wouldn't
488 work on systems that do support pipes: the pipe would fill up, and
489 you would block. So there isn't any easy way to conceal the
490 differences between the two types of systems.)
492 If you call both `pex_write_input' and `pex_read_output', be
493 careful to avoid deadlock. If the output pipe fills up, so that
494 each program in the pipeline is waiting for the next to read more
495 data, and you fill the input pipe by writing more data to FP, then
496 there is no way to make progress: the only process that could read
497 data from the output pipe is you, but you are blocked on the input
498 pipe. */
500 extern FILE *pex_write_input (struct pex_obj *obj, int binary);
502 /* Return a stream for a temporary file to pass to the first program
503 in the pipeline as input. The file name is chosen as for pex_run.
504 pex_run closes the file automatically; don't close it yourself. */
506 extern FILE *pex_input_file (struct pex_obj *obj, int flags,
507 const char *in_name);
509 /* Return a stream for a pipe connected to the standard input of the
510 first program in the pipeline. You must have passed
511 `PEX_USE_PIPES' to `pex_init'. Close the returned stream
512 yourself. */
514 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
516 /* Read the standard output of the last program to be executed.
517 pex_run can not be called after this. BINARY should be non-zero if
518 the file should be opened in binary mode; this is ignored on Unix.
519 Returns NULL on error. Don't call fclose on the returned FILE; it
520 will be closed by pex_free. */
522 extern FILE *pex_read_output (struct pex_obj *, int binary);
524 /* Return exit status of all programs in VECTOR. COUNT indicates the
525 size of VECTOR. The status codes in the vector are in the order of
526 the calls to pex_run. Returns 0 on error, 1 on success. */
528 extern int pex_get_status (struct pex_obj *, int count, int *vector);
530 /* Return times of all programs in VECTOR. COUNT indicates the size
531 of VECTOR. struct pex_time is really just struct timeval, but that
532 is not portable to all systems. Returns 0 on error, 1 on
533 success. */
535 struct pex_time
537 unsigned long user_seconds;
538 unsigned long user_microseconds;
539 unsigned long system_seconds;
540 unsigned long system_microseconds;
543 extern int pex_get_times (struct pex_obj *, int count,
544 struct pex_time *vector);
546 /* Clean up a pex_obj. */
548 extern void pex_free (struct pex_obj *);
550 /* Just execute one program. Return value is as for pex_run.
551 FLAGS Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
552 EXECUTABLE As for pex_run.
553 ARGV As for pex_run.
554 PNAME As for pex_init.
555 OUTNAME As for pex_run when PEX_LAST is set.
556 ERRNAME As for pex_run.
557 STATUS Set to exit status on success.
558 ERR As for pex_run.
561 extern const char *pex_one (int flags, const char *executable,
562 char * const *argv, const char *pname,
563 const char *outname, const char *errname,
564 int *status, int *err);
566 /* pexecute and pwait are the old pexecute interface, still here for
567 backward compatibility. Don't use these for new code. Instead,
568 use pex_init/pex_run/pex_get_status/pex_free, or pex_one. */
570 /* Definitions used by the pexecute routine. */
572 #define PEXECUTE_FIRST 1
573 #define PEXECUTE_LAST 2
574 #define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST)
575 #define PEXECUTE_SEARCH 4
576 #define PEXECUTE_VERBOSE 8
578 /* Execute a program. */
580 extern int pexecute (const char *, char * const *, const char *,
581 const char *, char **, char **, int);
583 /* Wait for pexecute to finish. */
585 extern int pwait (int, int *, int);
587 #if !HAVE_DECL_ASPRINTF
588 /* Like sprintf but provides a pointer to malloc'd storage, which must
589 be freed by the caller. */
591 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
592 #endif
594 #if !HAVE_DECL_VASPRINTF
595 /* Like vsprintf but provides a pointer to malloc'd storage, which
596 must be freed by the caller. */
598 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
599 #endif
601 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
602 /* Like sprintf but prints at most N characters. */
603 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
604 #endif
606 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
607 /* Like vsprintf but prints at most N characters. */
608 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
609 #endif
611 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
612 /* Compare version strings. */
613 extern int strverscmp (const char *, const char *);
614 #endif
616 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
618 /* Drastically simplified alloca configurator. If we're using GCC,
619 we use __builtin_alloca; otherwise we use the C alloca. The C
620 alloca is always available. You can override GCC by defining
621 USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
622 also set/unset as it is often used to indicate whether code needs
623 to call alloca(0). */
624 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
625 #undef alloca
626 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
627 # define alloca(x) __builtin_alloca(x)
628 # undef C_ALLOCA
629 # define ASTRDUP(X) \
630 (__extension__ ({ const char *const libiberty_optr = (X); \
631 const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
632 char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
633 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
634 #else
635 # define alloca(x) C_alloca(x)
636 # undef USE_C_ALLOCA
637 # define USE_C_ALLOCA 1
638 # undef C_ALLOCA
639 # define C_ALLOCA 1
640 extern const char *libiberty_optr;
641 extern char *libiberty_nptr;
642 extern unsigned long libiberty_len;
643 # define ASTRDUP(X) \
644 (libiberty_optr = (X), \
645 libiberty_len = strlen (libiberty_optr) + 1, \
646 libiberty_nptr = (char *) alloca (libiberty_len), \
647 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
648 #endif
650 #ifdef __cplusplus
652 #endif
655 #endif /* ! defined (LIBIBERTY_H) */