include/libiberty.h

   1 /* Function declarations for libiberty.
   2
   3    Copyright 2001 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 ((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 defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || (defined (HAVE_DECL_BASENAME) && !HAVE_DECL_BASENAME)
  77 extern char *basename PARAMS ((const char *));
  78 #else
  79 # if !defined (HAVE_DECL_BASENAME)
  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 /* Concatenate an arbitrary number of strings, up to (char *) NULL.
  89    Allocates memory using xmalloc.  */
  90
  91 extern char *concat PARAMS ((const char *, ...)) ATTRIBUTE_MALLOC;
  92
  93 /* Determine the length of concatenating an arbitrary number of
  94    strings, up to (char *) NULL.  */
  95
  96 extern unsigned long concat_length PARAMS ((const char *, ...));
  97
  98 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
  99    memory, up to (char *) NULL.  The supplied memory is assumed to be
 100    large enough.  */
 101
 102 extern char *concat_copy PARAMS ((char *, const char *, ...));
 103
 104 /* Concatenate an arbitrary number of strings into a GLOBAL area of
 105    memory, up to (char *) NULL.  The supplied memory is assumed to be
 106    large enough.  */
 107
 108 extern char *concat_copy2 PARAMS ((const char *, ...));
 109
 110 /* This is the global area used by concat_copy2.  */
 111
 112 extern char *libiberty_concat_ptr;
 113
 114 /* Concatenate an arbitrary number of strings, up to (char *) NULL.
 115    Allocates memory using alloca.  Arguments are evaluated twice!.  */
 116 #define ACONCAT(ACONCAT_PARAMS) \
 117   (libiberty_concat_ptr = alloca (concat_length ACONCAT_PARAMS + 1), \
 118    concat_copy2 ACONCAT_PARAMS)
 119
 120 /* Check whether two file descriptors refer to the same file.  */
 121
 122 extern int fdmatch PARAMS ((int fd1, int fd2));
 123
 124 /* Get the working directory.  The result is cached, so don't call
 125    chdir() between calls to getpwd().  */
 126
 127 extern char * getpwd PARAMS ((void));
 128
 129 /* Get the amount of time the process has run, in microseconds.  */
 130
 131 extern long get_run_time PARAMS ((void));
 132
 133 /* Choose a temporary directory to use for scratch files.  */
 134
 135 extern char *choose_temp_base PARAMS ((void)) ATTRIBUTE_MALLOC;
 136
 137 /* Return a temporary file name or NULL if unable to create one.  */
 138
 139 extern char *make_temp_file PARAMS ((const char *)) ATTRIBUTE_MALLOC;
 140
 141 /* Allocate memory filled with spaces.  Allocates using malloc.  */
 142
 143 extern const char *spaces PARAMS ((int count));
 144
 145 /* Return the maximum error number for which strerror will return a
 146    string.  */
 147
 148 extern int errno_max PARAMS ((void));
 149
 150 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
 151    "EINVAL").  */
 152
 153 extern const char *strerrno PARAMS ((int));
 154
 155 /* Given the name of an errno value, return the value.  */
 156
 157 extern int strtoerrno PARAMS ((const char *));
 158
 159 /* ANSI's strerror(), but more robust.  */
 160
 161 extern char *xstrerror PARAMS ((int));
 162
 163 /* Return the maximum signal number for which strsignal will return a
 164    string.  */
 165
 166 extern int signo_max PARAMS ((void));
 167
 168 /* Return a signal message string for a signal number
 169    (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
 170 /* This is commented out as it can conflict with one in system headers.
 171    We still document its existence though.  */
 172
 173 /*extern const char *strsignal PARAMS ((int));*/
 174
 175 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
 176    "SIGHUP").  */
 177
 178 extern const char *strsigno PARAMS ((int));
 179
 180 /* Given the name of a signal, return its number.  */
 181
 182 extern int strtosigno PARAMS ((const char *));
 183
 184 /* Register a function to be run by xexit.  Returns 0 on success.  */
 185
 186 extern int xatexit PARAMS ((void (*fn) (void)));
 187
 188 /* Exit, calling all the functions registered with xatexit.  */
 189
 190 extern void xexit PARAMS ((int status)) ATTRIBUTE_NORETURN;
 191
 192 /* Set the program name used by xmalloc.  */
 193
 194 extern void xmalloc_set_program_name PARAMS ((const char *));
 195
 196 /* Report an allocation failure.  */
 197 extern void xmalloc_failed PARAMS ((size_t)) ATTRIBUTE_NORETURN;
 198
 199 /* Allocate memory without fail.  If malloc fails, this will print a
 200    message to stderr (using the name set by xmalloc_set_program_name,
 201    if any) and then call xexit.  */
 202
 203 extern PTR xmalloc PARAMS ((size_t)) ATTRIBUTE_MALLOC;
 204
 205 /* Reallocate memory without fail.  This works like xmalloc.  Note,
 206    realloc type functions are not suitable for attribute malloc since
 207    they may return the same address across multiple calls. */
 208
 209 extern PTR xrealloc PARAMS ((PTR, size_t));
 210
 211 /* Allocate memory without fail and set it to zero.  This works like
 212    xmalloc.  */
 213
 214 extern PTR xcalloc PARAMS ((size_t, size_t)) ATTRIBUTE_MALLOC;
 215
 216 /* Copy a string into a memory buffer without fail.  */
 217
 218 extern char *xstrdup PARAMS ((const char *)) ATTRIBUTE_MALLOC;
 219
 220 /* Copy an existing memory buffer to a new memory buffer without fail.  */
 221
 222 extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;
 223
 224 /* hex character manipulation routines */
 225
 226 #define _hex_array_size 256
 227 #define _hex_bad        99
 228 extern char _hex_value[_hex_array_size];
 229 extern void hex_init PARAMS ((void));
 230 #define hex_p(c)        (hex_value (c) != _hex_bad)
 231 /* If you change this, note well: Some code relies on side effects in
 232    the argument being performed exactly once.  */
 233 #define hex_value(c)    (_hex_value[(unsigned char) (c)])
 234
 235 /* Definitions used by the pexecute routine.  */
 236
 237 #define PEXECUTE_FIRST   1
 238 #define PEXECUTE_LAST    2
 239 #define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
 240 #define PEXECUTE_SEARCH  4
 241 #define PEXECUTE_VERBOSE 8
 242
 243 /* Execute a program.  */
 244
 245 extern int pexecute PARAMS ((const char *, char * const *, const char *,
 246                             const char *, char **, char **, int));
 247
 248 /* Wait for pexecute to finish.  */
 249
 250 extern int pwait PARAMS ((int, int *, int));
 251
 252 /* Like sprintf but provides a pointer to malloc'd storage, which must
 253    be freed by the caller.  */
 254
 255 extern int asprintf PARAMS ((char **, const char *, ...)) ATTRIBUTE_PRINTF_2;
 256
 257 /* Like vsprintf but provides a pointer to malloc'd storage, which
 258    must be freed by the caller.  */
 259
 260 extern int vasprintf PARAMS ((char **, const char *, va_list))
 261   ATTRIBUTE_PRINTF(2,0);
 262
 263 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 264
 265 /* Drastically simplified alloca configurator.  If we're using GCC,
 266    we use __builtin_alloca; otherwise we use the C alloca.  The C
 267    alloca is always available.  You can override GCC by defining
 268    USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
 269    also set/unset as it is often used to indicate whether code needs
 270    to call alloca(0).  */
 271 extern PTR C_alloca PARAMS((size_t));
 272 #undef alloca
 273 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
 274 # define alloca(x) __builtin_alloca(x)
 275 # undef C_ALLOCA
 276 # define ASTRDUP(X) \
 277   (__extension__ ({ const char *const libiberty_optr = (X); \
 278    const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
 279    char *const libiberty_nptr = alloca (libiberty_len); \
 280    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
 281 #else
 282 # define alloca(x) C_alloca(x)
 283 # undef USE_C_ALLOCA
 284 # define USE_C_ALLOCA 1
 285 # undef C_ALLOCA
 286 # define C_ALLOCA 1
 287 extern const char *libiberty_optr;
 288 extern char *libiberty_nptr;
 289 extern unsigned long libiberty_len;
 290 # define ASTRDUP(X) \
 291   (libiberty_optr = (X), \
 292    libiberty_len = strlen (libiberty_optr) + 1, \
 293    libiberty_nptr = alloca (libiberty_len), \
 294    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
 295 #endif
 296
 297 #ifdef __cplusplus
 298 }
 299 #endif
 300
 301
 302 #endif /* ! defined (LIBIBERTY_H) */