1/* Function declarations for libiberty.
2
3   Copyright 2001, 2002 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., 59 Temple Place - Suite 330,
25   Boston, MA 02111-1307, 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
39extern "C" {
40#endif
41
42#include "ansidecl.h"
43
44#ifdef ANSI_PROTOTYPES
45/* Get a definition for size_t.  */
46#include <stddef.h>
47/* Get a definition for va_list.  */
48#include <stdarg.h>
49#endif
50
51/* Build an argument vector from a string.  Allocates memory using
52   malloc.  Use freeargv to free the vector.  */
53
54extern char **buildargv PARAMS ((const char *)) ATTRIBUTE_MALLOC;
55
56/* Free a vector returned by buildargv.  */
57
58extern void freeargv PARAMS ((char **));
59
60/* Duplicate an argument vector. Allocates memory using malloc.  Use
61   freeargv to free the vector.  */
62
63extern char **dupargv PARAMS ((char **)) ATTRIBUTE_MALLOC;
64
65
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
69   "const char *" */
70
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)
78extern char *basename PARAMS ((const char *));
79#else
80extern char *basename ();
81#endif
82#endif
83
84/* A well-defined basename () that is always compiled in.  */
85
86extern const char *lbasename PARAMS ((const char *));
87
88/* A well-defined realpath () that is always compiled in.  */
89
90extern char *lrealpath PARAMS ((const char *));
91
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.  */
95
96extern char *concat PARAMS ((const char *, ...)) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
97
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.  */
104
105extern char *reconcat PARAMS ((char *, const char *, ...)) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
106
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.  */
110
111extern unsigned long concat_length PARAMS ((const char *, ...)) ATTRIBUTE_SENTINEL;
112
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.  */
117
118extern char *concat_copy PARAMS ((char *, const char *, ...)) ATTRIBUTE_SENTINEL;
119
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.  */
124
125extern char *concat_copy2 PARAMS ((const char *, ...)) ATTRIBUTE_SENTINEL;
126
127/* This is the global area used by concat_copy2.  */
128
129extern char *libiberty_concat_ptr;
130
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
134   evaluated twice!  */
135#define ACONCAT(ACONCAT_PARAMS) \
136  (libiberty_concat_ptr = alloca (concat_length ACONCAT_PARAMS + 1), \
137   concat_copy2 ACONCAT_PARAMS)
138
139/* Check whether two file descriptors refer to the same file.  */
140
141extern int fdmatch PARAMS ((int fd1, int fd2));
142
143/* Get the working directory.  The result is cached, so don't call
144   chdir() between calls to getpwd().  */
145
146extern char * getpwd PARAMS ((void));
147
148/* Get the amount of time the process has run, in microseconds.  */
149
150extern long get_run_time PARAMS ((void));
151
152/* Generate a relocated path to some installation directory.  Allocates
153   return value using malloc.  */
154
155extern char *make_relative_prefix PARAMS ((const char *, const char *,
156					   const char *));
157
158/* Choose a temporary directory to use for scratch files.  */
159
160extern char *choose_temp_base PARAMS ((void)) ATTRIBUTE_MALLOC;
161
162/* Return a temporary file name or NULL if unable to create one.  */
163
164extern char *make_temp_file PARAMS ((const char *)) ATTRIBUTE_MALLOC;
165
166/* Allocate memory filled with spaces.  Allocates using malloc.  */
167
168extern const char *spaces PARAMS ((int count));
169
170/* Return the maximum error number for which strerror will return a
171   string.  */
172
173extern int errno_max PARAMS ((void));
174
175/* Return the name of an errno value (e.g., strerrno (EINVAL) returns
176   "EINVAL").  */
177
178extern const char *strerrno PARAMS ((int));
179
180/* Given the name of an errno value, return the value.  */
181
182extern int strtoerrno PARAMS ((const char *));
183
184/* ANSI's strerror(), but more robust.  */
185
186extern char *xstrerror PARAMS ((int));
187
188/* Return the maximum signal number for which strsignal will return a
189   string.  */
190
191extern int signo_max PARAMS ((void));
192
193/* Return a signal message string for a signal number
194   (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
195/* This is commented out as it can conflict with one in system headers.
196   We still document its existence though.  */
197
198/*extern const char *strsignal PARAMS ((int));*/
199
200/* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
201   "SIGHUP").  */
202
203extern const char *strsigno PARAMS ((int));
204
205/* Given the name of a signal, return its number.  */
206
207extern int strtosigno PARAMS ((const char *));
208
209/* Register a function to be run by xexit.  Returns 0 on success.  */
210
211extern int xatexit PARAMS ((void (*fn) (void)));
212
213/* Exit, calling all the functions registered with xatexit.  */
214
215extern void xexit PARAMS ((int status)) ATTRIBUTE_NORETURN;
216
217/* Set the program name used by xmalloc.  */
218
219extern void xmalloc_set_program_name PARAMS ((const char *));
220
221/* Report an allocation failure.  */
222extern void xmalloc_failed PARAMS ((size_t)) ATTRIBUTE_NORETURN;
223
224/* Allocate memory without fail.  If malloc fails, this will print a
225   message to stderr (using the name set by xmalloc_set_program_name,
226   if any) and then call xexit.  */
227
228extern PTR xmalloc PARAMS ((size_t)) ATTRIBUTE_MALLOC;
229
230/* Reallocate memory without fail.  This works like xmalloc.  Note,
231   realloc type functions are not suitable for attribute malloc since
232   they may return the same address across multiple calls. */
233
234extern PTR xrealloc PARAMS ((PTR, size_t));
235
236/* Allocate memory without fail and set it to zero.  This works like
237   xmalloc.  */
238
239extern PTR xcalloc PARAMS ((size_t, size_t)) ATTRIBUTE_MALLOC;
240
241/* Copy a string into a memory buffer without fail.  */
242
243extern char *xstrdup PARAMS ((const char *)) ATTRIBUTE_MALLOC;
244
245/* Copy an existing memory buffer to a new memory buffer without fail.  */
246
247extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;
248
249/* Physical memory routines.  Return values are in BYTES.  */
250extern double physmem_total PARAMS ((void));
251extern double physmem_available PARAMS ((void));
252
253
254/* These macros provide a K&R/C89/C++-friendly way of allocating structures
255   with nice encapsulation.  The XDELETE*() macros are technically
256   superfluous, but provided here for symmetry.  Using them consistently
257   makes it easier to update client code to use different allocators such
258   as new/delete and new[]/delete[].  */
259
260/* Scalar allocators.  */
261
262#define XNEW(T)			((T *) xmalloc (sizeof (T)))
263#define XCNEW(T)		((T *) xcalloc (1, sizeof (T)))
264#define XDELETE(P)		free ((void*) (P))
265
266/* Array allocators.  */
267
268#define XNEWVEC(T, N)		((T *) xmalloc (sizeof (T) * (N)))
269#define XCNEWVEC(T, N)		((T *) xcalloc ((N), sizeof (T)))
270#define XRESIZEVEC(T, P, N)	((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
271#define XDELETEVEC(P)		free ((void*) (P))
272
273/* Allocators for variable-sized structures and raw buffers.  */
274
275#define XNEWVAR(T, S)		((T *) xmalloc ((S)))
276#define XCNEWVAR(T, S)		((T *) xcalloc (1, (S)))
277#define XRESIZEVAR(T, P, S)	((T *) xrealloc ((P), (S)))
278
279/* Type-safe obstack allocator.  */
280
281#define XOBNEW(O, T)		((T *) obstack_alloc ((O), sizeof (T)))
282
283
284/* hex character manipulation routines */
285
286#define _hex_array_size 256
287#define _hex_bad	99
288extern const unsigned char _hex_value[_hex_array_size];
289extern void hex_init PARAMS ((void));
290#define hex_p(c)	(hex_value (c) != _hex_bad)
291/* If you change this, note well: Some code relies on side effects in
292   the argument being performed exactly once.  */
293#define hex_value(c)	((unsigned int) _hex_value[(unsigned char) (c)])
294
295/* Definitions used by the pexecute routine.  */
296
297#define PEXECUTE_FIRST   1
298#define PEXECUTE_LAST    2
299#define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
300#define PEXECUTE_SEARCH  4
301#define PEXECUTE_VERBOSE 8
302
303/* Execute a program.  */
304
305extern int pexecute PARAMS ((const char *, char * const *, const char *,
306			    const char *, char **, char **, int));
307
308/* Wait for pexecute to finish.  */
309
310extern int pwait PARAMS ((int, int *, int));
311
312#if !HAVE_DECL_ASPRINTF
313/* Like sprintf but provides a pointer to malloc'd storage, which must
314   be freed by the caller.  */
315
316extern int asprintf PARAMS ((char **, const char *, ...)) ATTRIBUTE_PRINTF_2;
317#endif
318
319#if !HAVE_DECL_VASPRINTF
320/* Like vsprintf but provides a pointer to malloc'd storage, which
321   must be freed by the caller.  */
322
323extern int vasprintf PARAMS ((char **, const char *, va_list))
324  ATTRIBUTE_PRINTF(2,0);
325#endif
326
327#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
328
329/* Drastically simplified alloca configurator.  If we're using GCC,
330   we use __builtin_alloca; otherwise we use the C alloca.  The C
331   alloca is always available.  You can override GCC by defining
332   USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
333   also set/unset as it is often used to indicate whether code needs
334   to call alloca(0).  */
335extern PTR C_alloca PARAMS ((size_t)) ATTRIBUTE_MALLOC;
336#undef alloca
337#if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
338# define alloca(x) __builtin_alloca(x)
339# undef C_ALLOCA
340# define ASTRDUP(X) \
341  (__extension__ ({ const char *const libiberty_optr = (X); \
342   const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
343   char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
344   (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
345#else
346# define alloca(x) C_alloca(x)
347# undef USE_C_ALLOCA
348# define USE_C_ALLOCA 1
349# undef C_ALLOCA
350# define C_ALLOCA 1
351extern const char *libiberty_optr;
352extern char *libiberty_nptr;
353extern unsigned long libiberty_len;
354# define ASTRDUP(X) \
355  (libiberty_optr = (X), \
356   libiberty_len = strlen (libiberty_optr) + 1, \
357   libiberty_nptr = (char *) alloca (libiberty_len), \
358   (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
359#endif
360
361#ifdef __cplusplus
362}
363#endif
364
365
366#endif /* ! defined (LIBIBERTY_H) */
367