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(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || 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 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
 105 extern 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
 111 extern 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
 118 extern 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
 125 extern char *concat_copy2 PARAMS ((const char *, ...)) ATTRIBUTE_SENTINEL;
 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 current time.  */
 149 /* Prototypes vary from system to system, so we only provide a
 150    prototype on systems where we know that we need it.  */
 151 #ifdef __MINGW32__
 152 /* Forward declaration to avoid #include <sys/time.h>.   */
 153 struct timeval;
 154 extern int gettimeofday PARAMS ((struct timeval *, void *));
 155 #endif
 156
 157 /* Get the amount of time the process has run, in microseconds.  */
 158
 159 extern long get_run_time PARAMS ((void));
 160
 161 /* Generate a relocated path to some installation directory.  Allocates
 162    return value using malloc.  */
 163
 164 extern char *make_relative_prefix PARAMS ((const char *, const char *,
 165                                            const char *));
 166
 167 /* Choose a temporary directory to use for scratch files.  */
 168
 169 extern char *choose_temp_base PARAMS ((void)) ATTRIBUTE_MALLOC;
 170
 171 /* Return a temporary file name or NULL if unable to create one.  */
 172
 173 extern char *make_temp_file PARAMS ((const char *)) ATTRIBUTE_MALLOC;
 174
 175 /* Remove a link to a file unless it is special. */
 176
 177 extern int unlink_if_ordinary PARAMS((const char *));
 178
 179 /* Allocate memory filled with spaces.  Allocates using malloc.  */
 180
 181 extern const char *spaces PARAMS ((int count));
 182
 183 /* Return the maximum error number for which strerror will return a
 184    string.  */
 185
 186 extern int errno_max PARAMS ((void));
 187
 188 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
 189    "EINVAL").  */
 190
 191 extern const char *strerrno PARAMS ((int));
 192
 193 /* Given the name of an errno value, return the value.  */
 194
 195 extern int strtoerrno PARAMS ((const char *));
 196
 197 /* ANSI's strerror(), but more robust.  */
 198
 199 extern char *xstrerror PARAMS ((int));
 200
 201 /* Return the maximum signal number for which strsignal will return a
 202    string.  */
 203
 204 extern int signo_max PARAMS ((void));
 205
 206 /* Return a signal message string for a signal number
 207    (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
 208 /* This is commented out as it can conflict with one in system headers.
 209    We still document its existence though.  */
 210
 211 /*extern const char *strsignal PARAMS ((int));*/
 212
 213 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
 214    "SIGHUP").  */
 215
 216 extern const char *strsigno PARAMS ((int));
 217
 218 /* Given the name of a signal, return its number.  */
 219
 220 extern int strtosigno PARAMS ((const char *));
 221
 222 /* Register a function to be run by xexit.  Returns 0 on success.  */
 223
 224 extern int xatexit PARAMS ((void (*fn) (void)));
 225
 226 /* Exit, calling all the functions registered with xatexit.  */
 227
 228 extern void xexit PARAMS ((int status)) ATTRIBUTE_NORETURN;
 229
 230 /* Set the program name used by xmalloc.  */
 231
 232 extern void xmalloc_set_program_name PARAMS ((const char *));
 233
 234 /* Report an allocation failure.  */
 235 extern void xmalloc_failed PARAMS ((size_t)) ATTRIBUTE_NORETURN;
 236
 237 /* Allocate memory without fail.  If malloc fails, this will print a
 238    message to stderr (using the name set by xmalloc_set_program_name,
 239    if any) and then call xexit.  */
 240
 241 extern PTR xmalloc PARAMS ((size_t)) ATTRIBUTE_MALLOC;
 242
 243 /* Reallocate memory without fail.  This works like xmalloc.  Note,
 244    realloc type functions are not suitable for attribute malloc since
 245    they may return the same address across multiple calls. */
 246
 247 extern PTR xrealloc PARAMS ((PTR, size_t));
 248
 249 /* Allocate memory without fail and set it to zero.  This works like
 250    xmalloc.  */
 251
 252 extern PTR xcalloc PARAMS ((size_t, size_t)) ATTRIBUTE_MALLOC;
 253
 254 /* Copy a string into a memory buffer without fail.  */
 255
 256 extern char *xstrdup PARAMS ((const char *)) ATTRIBUTE_MALLOC;
 257
 258 /* Copy an existing memory buffer to a new memory buffer without fail.  */
 259
 260 extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;
 261
 262 /* Physical memory routines.  Return values are in BYTES.  */
 263 extern double physmem_total PARAMS ((void));
 264 extern double physmem_available PARAMS ((void));
 265
 266
 267 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
 268    with nice encapsulation.  The XDELETE*() macros are technically
 269    superfluous, but provided here for symmetry.  Using them consistently
 270    makes it easier to update client code to use different allocators such
 271    as new/delete and new[]/delete[].  */
 272
 273 /* Scalar allocators.  */
 274
 275 #define XNEW(T)                 ((T *) xmalloc (sizeof (T)))
 276 #define XCNEW(T)                ((T *) xcalloc (1, sizeof (T)))
 277 #define XDELETE(P)              free ((void*) (P))
 278
 279 /* Array allocators.  */
 280
 281 #define XNEWVEC(T, N)           ((T *) xmalloc (sizeof (T) * (N)))
 282 #define XCNEWVEC(T, N)          ((T *) xcalloc ((N), sizeof (T)))
 283 #define XRESIZEVEC(T, P, N)     ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
 284 #define XDELETEVEC(P)           free ((void*) (P))
 285
 286 /* Allocators for variable-sized structures and raw buffers.  */
 287
 288 #define XNEWVAR(T, S)           ((T *) xmalloc ((S)))
 289 #define XCNEWVAR(T, S)          ((T *) xcalloc (1, (S)))
 290 #define XRESIZEVAR(T, P, S)     ((T *) xrealloc ((P), (S)))
 291
 292 /* Type-safe obstack allocator.  */
 293
 294 #define XOBNEW(O, T)            ((T *) obstack_alloc ((O), sizeof (T)))
 295
 296
 297 /* hex character manipulation routines */
 298
 299 #define _hex_array_size 256
 300 #define _hex_bad        99
 301 extern const unsigned char _hex_value[_hex_array_size];
 302 extern void hex_init PARAMS ((void));
 303 #define hex_p(c)        (hex_value (c) != _hex_bad)
 304 /* If you change this, note well: Some code relies on side effects in
 305    the argument being performed exactly once.  */
 306 #define hex_value(c)    ((unsigned int) _hex_value[(unsigned char) (c)])
 307
 308 /* Definitions used by the pexecute routine.  */
 309
 310 #define PEXECUTE_FIRST   1
 311 #define PEXECUTE_LAST    2
 312 #define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
 313 #define PEXECUTE_SEARCH  4
 314 #define PEXECUTE_VERBOSE 8
 315
 316 /* Execute a program.  */
 317
 318 extern int pexecute PARAMS ((const char *, char * const *, const char *,
 319                             const char *, char **, char **, int));
 320
 321 /* Wait for pexecute to finish.  */
 322
 323 extern int pwait PARAMS ((int, int *, int));
 324
 325 #if !HAVE_DECL_ASPRINTF
 326 /* Like sprintf but provides a pointer to malloc'd storage, which must
 327    be freed by the caller.  */
 328
 329 extern int asprintf PARAMS ((char **, const char *, ...)) ATTRIBUTE_PRINTF_2;
 330 #endif
 331
 332 #if !HAVE_DECL_VASPRINTF
 333 /* Like vsprintf but provides a pointer to malloc'd storage, which
 334    must be freed by the caller.  */
 335
 336 extern int vasprintf PARAMS ((char **, const char *, va_list))
 337   ATTRIBUTE_PRINTF(2,0);
 338 #endif
 339
 340 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 341
 342 /* Drastically simplified alloca configurator.  If we're using GCC,
 343    we use __builtin_alloca; otherwise we use the C alloca.  The C
 344    alloca is always available.  You can override GCC by defining
 345    USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
 346    also set/unset as it is often used to indicate whether code needs
 347    to call alloca(0).  */
 348 extern PTR C_alloca PARAMS ((size_t)) ATTRIBUTE_MALLOC;
 349 #undef alloca
 350 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
 351 # define alloca(x) __builtin_alloca(x)
 352 # undef C_ALLOCA
 353 # define ASTRDUP(X) \
 354   (__extension__ ({ const char *const libiberty_optr = (X); \
 355    const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
 356    char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
 357    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
 358 #else
 359 # define alloca(x) C_alloca(x)
 360 # undef USE_C_ALLOCA
 361 # define USE_C_ALLOCA 1
 362 # undef C_ALLOCA
 363 # define C_ALLOCA 1
 364 extern const char *libiberty_optr;
 365 extern char *libiberty_nptr;
 366 extern unsigned long libiberty_len;
 367 # define ASTRDUP(X) \
 368   (libiberty_optr = (X), \
 369    libiberty_len = strlen (libiberty_optr) + 1, \
 370    libiberty_nptr = (char *) alloca (libiberty_len), \
 371    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
 372 #endif
 373
 374 #ifdef __cplusplus
 375 }
 376 #endif
 377
 378
 379 #endif /* ! defined (LIBIBERTY_H) */