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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
39 extern "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
54 extern char **buildargv PARAMS ((const char *)) ATTRIBUTE_MALLOC;
55
56 /* Free a vector returned by buildargv. */
57
58 extern void freeargv PARAMS ((char **));
59
60 /* Duplicate an argument vector. Allocates memory using malloc. Use
61 freeargv to free the vector. */
62
63 extern 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 (HAVE_DECL_BASENAME)
78 extern char *basename PARAMS ((const char *));
79 #else
80 extern char *basename ();
81 #endif
82 #endif
83
84 /* A well-defined basename () that is always compiled in. */
85
86 extern const char *lbasename PARAMS ((const char *));
87
88 /* A well-defined realpath () that is always compiled in. */
89
90 extern 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
96 extern char *concat PARAMS ((const char *, ...)) ATTRIBUTE_MALLOC;
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
105 extern char *reconcat PARAMS ((char *, const char *, ...)) ATTRIBUTE_MALLOC;
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
111 extern unsigned long concat_length PARAMS ((const char *, ...));
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
118 extern char *concat_copy PARAMS ((char *, const char *, ...));
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
125 extern char *concat_copy2 PARAMS ((const char *, ...));
126
127 /* This is the global area used by concat_copy2. */
128
129 extern 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
141 extern 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
146 extern char * getpwd PARAMS ((void));
147
148 /* Get the amount of time the process has run, in microseconds. */
149
150 extern long get_run_time PARAMS ((void));
151
152 /* Generate a relocated path to some installation directory. Allocates
153 return value using malloc. */
154
155 extern char *make_relative_prefix PARAMS ((const char *, const char *,
156 const char *));
157
158 /* Choose a temporary directory to use for scratch files. */
159
160 extern char *choose_temp_base PARAMS ((void)) ATTRIBUTE_MALLOC;
161
162 /* Return a temporary file name or NULL if unable to create one. */
163
164 extern char *make_temp_file PARAMS ((const char *)) ATTRIBUTE_MALLOC;
165
166 /* Allocate memory filled with spaces. Allocates using malloc. */
167
168 extern const char *spaces PARAMS ((int count));
169
170 /* Return the maximum error number for which strerror will return a
171 string. */
172
173 extern int errno_max PARAMS ((void));
174
175 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
176 "EINVAL"). */
177
178 extern const char *strerrno PARAMS ((int));
179
180 /* Given the name of an errno value, return the value. */
181
182 extern int strtoerrno PARAMS ((const char *));
183
184 /* ANSI's strerror(), but more robust. */
185
186 extern char *xstrerror PARAMS ((int));
187
188 /* Return the maximum signal number for which strsignal will return a
189 string. */
190
191 extern 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
203 extern const char *strsigno PARAMS ((int));
204
205 /* Given the name of a signal, return its number. */
206
207 extern int strtosigno PARAMS ((const char *));
208
209 /* Register a function to be run by xexit. Returns 0 on success. */
210
211 extern int xatexit PARAMS ((void (*fn) (void)));
212
213 /* Exit, calling all the functions registered with xatexit. */
214
215 extern void xexit PARAMS ((int status)) ATTRIBUTE_NORETURN;
216
217 /* Set the program name used by xmalloc. */
218
219 extern void xmalloc_set_program_name PARAMS ((const char *));
220
221 /* Report an allocation failure. */
222 extern 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
228 extern 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
234 extern PTR xrealloc PARAMS ((PTR, size_t));
235
236 /* Allocate memory without fail and set it to zero. This works like
237 xmalloc. */
238
239 extern PTR xcalloc PARAMS ((size_t, size_t)) ATTRIBUTE_MALLOC;
240
241 /* Copy a string into a memory buffer without fail. */
242
243 extern char *xstrdup PARAMS ((const char *)) ATTRIBUTE_MALLOC;
244
245 /* Copy an existing memory buffer to a new memory buffer without fail. */
246
247 extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;
248
249 /* Physical memory routines. Return values are in BYTES. */
250 extern double physmem_total PARAMS ((void));
251 extern double physmem_available PARAMS ((void));
252
253 /* hex character manipulation routines */
254
255 #define _hex_array_size 256
256 #define _hex_bad 99
257 extern const unsigned char _hex_value[_hex_array_size];
258 extern void hex_init PARAMS ((void));
259 #define hex_p(c) (hex_value (c) != _hex_bad)
260 /* If you change this, note well: Some code relies on side effects in
261 the argument being performed exactly once. */
262 #define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)])
263
264 /* Definitions used by the pexecute routine. */
265
266 #define PEXECUTE_FIRST 1
267 #define PEXECUTE_LAST 2
268 #define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST)
269 #define PEXECUTE_SEARCH 4
270 #define PEXECUTE_VERBOSE 8
271
272 /* Execute a program. */
273
274 extern int pexecute PARAMS ((const char *, char * const *, const char *,
275 const char *, char **, char **, int));
276
277 /* Wait for pexecute to finish. */
278
279 extern int pwait PARAMS ((int, int *, int));
280
281 #if !HAVE_DECL_ASPRINTF
282 /* Like sprintf but provides a pointer to malloc'd storage, which must
283 be freed by the caller. */
284
285 extern int asprintf PARAMS ((char **, const char *, ...)) ATTRIBUTE_PRINTF_2;
286 #endif
287
288 #if !HAVE_DECL_VASPRINTF
289 /* Like vsprintf but provides a pointer to malloc'd storage, which
290 must be freed by the caller. */
291
292 extern int vasprintf PARAMS ((char **, const char *, va_list))
293 ATTRIBUTE_PRINTF(2,0);
294 #endif
295
296 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
297
298 /* Drastically simplified alloca configurator. If we're using GCC,
299 we use __builtin_alloca; otherwise we use the C alloca. The C
300 alloca is always available. You can override GCC by defining
301 USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
302 also set/unset as it is often used to indicate whether code needs
303 to call alloca(0). */
304 extern PTR C_alloca PARAMS ((size_t)) ATTRIBUTE_MALLOC;
305 #undef alloca
306 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
307 # define alloca(x) __builtin_alloca(x)
308 # undef C_ALLOCA
309 # define ASTRDUP(X) \
310 (__extension__ ({ const char *const libiberty_optr = (X); \
311 const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
312 char *const libiberty_nptr = alloca (libiberty_len); \
313 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
314 #else
315 # define alloca(x) C_alloca(x)
316 # undef USE_C_ALLOCA
317 # define USE_C_ALLOCA 1
318 # undef C_ALLOCA
319 # define C_ALLOCA 1
320 extern const char *libiberty_optr;
321 extern char *libiberty_nptr;
322 extern unsigned long libiberty_len;
323 # define ASTRDUP(X) \
324 (libiberty_optr = (X), \
325 libiberty_len = strlen (libiberty_optr) + 1, \
326 libiberty_nptr = alloca (libiberty_len), \
327 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
328 #endif
329
330 #ifdef __cplusplus
331 }
332 #endif
333
334
335 #endif /* ! defined (LIBIBERTY_H) */