include/libiberty.h

   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 (__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 /* Concatenate an arbitrary number of strings.  You must pass NULL as
  89    the last argument of this function, to terminate the list of
  90    strings.  Allocates memory using xmalloc.  */
  91
  92 extern char *concat PARAMS ((const char *, ...)) ATTRIBUTE_MALLOC;
  93
  94 /* Concatenate an arbitrary number of strings.  You must pass NULL as
  95    the last argument of this function, to terminate the list of
  96    strings.  Allocates memory using xmalloc.  The first argument is
  97    not one of the strings to be concatenated, but if not NULL is a
  98    pointer to be freed after the new string is created, similar to the
  99    way xrealloc works.  */
 100
 101 extern char *reconcat PARAMS ((char *, const char *, ...)) ATTRIBUTE_MALLOC;
 102
 103 /* Determine the length of concatenating an arbitrary number of
 104    strings.  You must pass NULL as the last argument of this function,
 105    to terminate the list of strings.  */
 106
 107 extern unsigned long concat_length PARAMS ((const char *, ...));
 108
 109 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
 110    memory.  You must pass NULL as the last argument of this function,
 111    to terminate the list of strings.  The supplied memory is assumed
 112    to be large enough.  */
 113
 114 extern char *concat_copy PARAMS ((char *, const char *, ...));
 115
 116 /* Concatenate an arbitrary number of strings into a GLOBAL area of
 117    memory.  You must pass NULL as the last argument of this function,
 118    to terminate the list of strings.  The supplied memory is assumed
 119    to be large enough.  */
 120
 121 extern char *concat_copy2 PARAMS ((const char *, ...));
 122
 123 /* This is the global area used by concat_copy2.  */
 124
 125 extern char *libiberty_concat_ptr;
 126
 127 /* Concatenate an arbitrary number of strings.  You must pass NULL as
 128    the last argument of this function, to terminate the list of
 129    strings.  Allocates memory using alloca.  The arguments are
 130    evaluated twice!  */
 131 #define ACONCAT(ACONCAT_PARAMS) \
 132   (libiberty_concat_ptr = alloca (concat_length ACONCAT_PARAMS + 1), \
 133    concat_copy2 ACONCAT_PARAMS)
 134
 135 /* Check whether two file descriptors refer to the same file.  */
 136
 137 extern int fdmatch PARAMS ((int fd1, int fd2));
 138
 139 /* Get the working directory.  The result is cached, so don't call
 140    chdir() between calls to getpwd().  */
 141
 142 extern char * getpwd PARAMS ((void));
 143
 144 /* Get the amount of time the process has run, in microseconds.  */
 145
 146 extern long get_run_time PARAMS ((void));
 147
 148 /* Choose a temporary directory to use for scratch files.  */
 149
 150 extern char *choose_temp_base PARAMS ((void)) ATTRIBUTE_MALLOC;
 151
 152 /* Return a temporary file name or NULL if unable to create one.  */
 153
 154 extern char *make_temp_file PARAMS ((const char *)) ATTRIBUTE_MALLOC;
 155
 156 /* Allocate memory filled with spaces.  Allocates using malloc.  */
 157
 158 extern const char *spaces PARAMS ((int count));
 159
 160 /* Return the maximum error number for which strerror will return a
 161    string.  */
 162
 163 extern int errno_max PARAMS ((void));
 164
 165 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
 166    "EINVAL").  */
 167
 168 extern const char *strerrno PARAMS ((int));
 169
 170 /* Given the name of an errno value, return the value.  */
 171
 172 extern int strtoerrno PARAMS ((const char *));
 173
 174 /* ANSI's strerror(), but more robust.  */
 175
 176 extern char *xstrerror PARAMS ((int));
 177
 178 /* Return the maximum signal number for which strsignal will return a
 179    string.  */
 180
 181 extern int signo_max PARAMS ((void));
 182
 183 /* Return a signal message string for a signal number
 184    (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
 185 /* This is commented out as it can conflict with one in system headers.
 186    We still document its existence though.  */
 187
 188 /*extern const char *strsignal PARAMS ((int));*/
 189
 190 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
 191    "SIGHUP").  */
 192
 193 extern const char *strsigno PARAMS ((int));
 194
 195 /* Given the name of a signal, return its number.  */
 196
 197 extern int strtosigno PARAMS ((const char *));
 198
 199 /* Register a function to be run by xexit.  Returns 0 on success.  */
 200
 201 extern int xatexit PARAMS ((void (*fn) (void)));
 202
 203 /* Exit, calling all the functions registered with xatexit.  */
 204
 205 extern void xexit PARAMS ((int status)) ATTRIBUTE_NORETURN;
 206
 207 /* Set the program name used by xmalloc.  */
 208
 209 extern void xmalloc_set_program_name PARAMS ((const char *));
 210
 211 /* Report an allocation failure.  */
 212 extern void xmalloc_failed PARAMS ((size_t)) ATTRIBUTE_NORETURN;
 213
 214 /* Allocate memory without fail.  If malloc fails, this will print a
 215    message to stderr (using the name set by xmalloc_set_program_name,
 216    if any) and then call xexit.  */
 217
 218 extern PTR xmalloc PARAMS ((size_t)) ATTRIBUTE_MALLOC;
 219
 220 /* Reallocate memory without fail.  This works like xmalloc.  Note,
 221    realloc type functions are not suitable for attribute malloc since
 222    they may return the same address across multiple calls. */
 223
 224 extern PTR xrealloc PARAMS ((PTR, size_t));
 225
 226 /* Allocate memory without fail and set it to zero.  This works like
 227    xmalloc.  */
 228
 229 extern PTR xcalloc PARAMS ((size_t, size_t)) ATTRIBUTE_MALLOC;
 230
 231 /* Copy a string into a memory buffer without fail.  */
 232
 233 extern char *xstrdup PARAMS ((const char *)) ATTRIBUTE_MALLOC;
 234
 235 /* Copy an existing memory buffer to a new memory buffer without fail.  */
 236
 237 extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;
 238
 239 /* hex character manipulation routines */
 240
 241 #define _hex_array_size 256
 242 #define _hex_bad        99
 243 extern const char _hex_value[_hex_array_size];
 244 extern void hex_init PARAMS ((void));
 245 #define hex_p(c)        (hex_value (c) != _hex_bad)
 246 /* If you change this, note well: Some code relies on side effects in
 247    the argument being performed exactly once.  */
 248 #define hex_value(c)    (_hex_value[(unsigned char) (c)])
 249
 250 /* Definitions used by the pexecute routine.  */
 251
 252 #define PEXECUTE_FIRST   1
 253 #define PEXECUTE_LAST    2
 254 #define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
 255 #define PEXECUTE_SEARCH  4
 256 #define PEXECUTE_VERBOSE 8
 257
 258 /* Execute a program.  */
 259
 260 extern int pexecute PARAMS ((const char *, char * const *, const char *,
 261                             const char *, char **, char **, int));
 262
 263 /* Wait for pexecute to finish.  */
 264
 265 extern int pwait PARAMS ((int, int *, int));
 266
 267 /* Like sprintf but provides a pointer to malloc'd storage, which must
 268    be freed by the caller.  */
 269
 270 extern int asprintf PARAMS ((char **, const char *, ...)) ATTRIBUTE_PRINTF_2;
 271
 272 /* Like vsprintf but provides a pointer to malloc'd storage, which
 273    must be freed by the caller.  */
 274
 275 extern int vasprintf PARAMS ((char **, const char *, va_list))
 276   ATTRIBUTE_PRINTF(2,0);
 277
 278 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 279
 280 /* Drastically simplified alloca configurator.  If we're using GCC,
 281    we use __builtin_alloca; otherwise we use the C alloca.  The C
 282    alloca is always available.  You can override GCC by defining
 283    USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
 284    also set/unset as it is often used to indicate whether code needs
 285    to call alloca(0).  */
 286 extern PTR C_alloca PARAMS ((size_t)) ATTRIBUTE_MALLOC;
 287 #undef alloca
 288 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
 289 # define alloca(x) __builtin_alloca(x)
 290 # undef C_ALLOCA
 291 # define ASTRDUP(X) \
 292   (__extension__ ({ const char *const libiberty_optr = (X); \
 293    const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
 294    char *const libiberty_nptr = alloca (libiberty_len); \
 295    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
 296 #else
 297 # define alloca(x) C_alloca(x)
 298 # undef USE_C_ALLOCA
 299 # define USE_C_ALLOCA 1
 300 # undef C_ALLOCA
 301 # define C_ALLOCA 1
 302 extern const char *libiberty_optr;
 303 extern char *libiberty_nptr;
 304 extern unsigned long libiberty_len;
 305 # define ASTRDUP(X) \
 306   (libiberty_optr = (X), \
 307    libiberty_len = strlen (libiberty_optr) + 1, \
 308    libiberty_nptr = alloca (libiberty_len), \
 309    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
 310 #endif
 311
 312 #ifdef __cplusplus
 313 }
 314 #endif
 315
 316
 317 #endif /* ! defined (LIBIBERTY_H) */