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) */ 336