1 /* Function declarations for libiberty. 2 3 Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 4 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. 5 6 Note - certain prototypes declared in this header file are for 7 functions whoes implementation copyright does not belong to the 8 FSF. Those prototypes are present in this file for reference 9 purposes only and their presence in this file should not construed 10 as an indication of ownership by the FSF of the implementation of 11 those functions in any way or form whatsoever. 12 13 This program is free software; you can redistribute it and/or modify 14 it under the terms of the GNU General Public License as published by 15 the Free Software Foundation; either version 2, or (at your option) 16 any later version. 17 18 This program is distributed in the hope that it will be useful, 19 but WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 GNU General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 51 Franklin Street - Fifth Floor, 26 Boston, MA 02110-1301, USA. 27 28 Written by Cygnus Support, 1994. 29 30 The libiberty library provides a number of functions which are 31 missing on some operating systems. We do not declare those here, 32 to avoid conflicts with the system header files on operating 33 systems that do support those functions. In this file we only 34 declare those functions which are specific to libiberty. */ 35 36 #ifndef LIBIBERTY_H 37 #define LIBIBERTY_H 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 #include "ansidecl.h" 44 45 /* Get a definition for size_t. */ 46 #include <stddef.h> 47 /* Get a definition for va_list. */ 48 #include <stdarg.h> 49 50 #include <stdio.h> 51 52 /* If the OS supports it, ensure that the supplied stream is setup to 53 avoid any multi-threaded locking. Otherwise leave the FILE pointer 54 unchanged. If the stream is NULL do nothing. */ 55 56 extern void unlock_stream (FILE *); 57 58 /* If the OS supports it, ensure that the standard I/O streams, stdin, 59 stdout and stderr are setup to avoid any multi-threaded locking. 60 Otherwise do nothing. */ 61 62 extern void unlock_std_streams (void); 63 64 /* Open and return a FILE pointer. If the OS supports it, ensure that 65 the stream is setup to avoid any multi-threaded locking. Otherwise 66 return the FILE pointer unchanged. */ 67 68 extern FILE *fopen_unlocked (const char *, const char *); 69 extern FILE *fdopen_unlocked (int, const char *); 70 extern FILE *freopen_unlocked (const char *, const char *, FILE *); 71 72 /* Build an argument vector from a string. Allocates memory using 73 malloc. Use freeargv to free the vector. */ 74 75 extern char **buildargv (const char *) ATTRIBUTE_MALLOC; 76 77 /* Free a vector returned by buildargv. */ 78 79 extern void freeargv (char **); 80 81 /* Duplicate an argument vector. Allocates memory using malloc. Use 82 freeargv to free the vector. */ 83 84 extern char **dupargv (char **) ATTRIBUTE_MALLOC; 85 86 /* Expand "@file" arguments in argv. */ 87 88 extern void expandargv PARAMS ((int *, char ***)); 89 90 /* Write argv to an @-file, inserting necessary quoting. */ 91 92 extern int writeargv PARAMS ((char **, FILE *)); 93 94 /* Return the last component of a path name. Note that we can't use a 95 prototype here because the parameter is declared inconsistently 96 across different systems, sometimes as "char *" and sometimes as 97 "const char *" */ 98 99 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is 100 undefined, we haven't run the autoconf check so provide the 101 declaration without arguments. If it is 0, we checked and failed 102 to find the declaration so provide a fully prototyped one. If it 103 is 1, we found it so don't provide any declaration at all. */ 104 #if !HAVE_DECL_BASENAME 105 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME) 106 extern char *basename (const char *); 107 #else 108 /* Do not allow basename to be used if there is no prototype seen. We 109 either need to use the above prototype or have one from 110 autoconf which would result in HAVE_DECL_BASENAME being set. */ 111 #define basename basename_cannot_be_used_without_a_prototype 112 #endif 113 #endif 114 115 /* A well-defined basename () that is always compiled in. */ 116 117 extern const char *lbasename (const char *); 118 119 /* Same, but assumes DOS semantics (drive name, backslash is also a 120 dir separator) regardless of host. */ 121 122 extern const char *dos_lbasename (const char *); 123 124 /* Same, but assumes Unix semantics (absolute paths always start with 125 a slash, only forward slash is accepted as dir separator) 126 regardless of host. */ 127 128 extern const char *unix_lbasename (const char *); 129 130 /* A well-defined realpath () that is always compiled in. */ 131 132 extern char *lrealpath (const char *); 133 134 /* Concatenate an arbitrary number of strings. You must pass NULL as 135 the last argument of this function, to terminate the list of 136 strings. Allocates memory using xmalloc. */ 137 138 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL; 139 140 /* Concatenate an arbitrary number of strings. You must pass NULL as 141 the last argument of this function, to terminate the list of 142 strings. Allocates memory using xmalloc. The first argument is 143 not one of the strings to be concatenated, but if not NULL is a 144 pointer to be freed after the new string is created, similar to the 145 way xrealloc works. */ 146 147 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL; 148 149 /* Determine the length of concatenating an arbitrary number of 150 strings. You must pass NULL as the last argument of this function, 151 to terminate the list of strings. */ 152 153 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL; 154 155 /* Concatenate an arbitrary number of strings into a SUPPLIED area of 156 memory. You must pass NULL as the last argument of this function, 157 to terminate the list of strings. The supplied memory is assumed 158 to be large enough. */ 159 160 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL; 161 162 /* Concatenate an arbitrary number of strings into a GLOBAL area of 163 memory. You must pass NULL as the last argument of this function, 164 to terminate the list of strings. The supplied memory is assumed 165 to be large enough. */ 166 167 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL; 168 169 /* This is the global area used by concat_copy2. */ 170 171 extern char *libiberty_concat_ptr; 172 173 /* Concatenate an arbitrary number of strings. You must pass NULL as 174 the last argument of this function, to terminate the list of 175 strings. Allocates memory using alloca. The arguments are 176 evaluated twice! */ 177 #define ACONCAT(ACONCAT_PARAMS) \ 178 (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \ 179 concat_copy2 ACONCAT_PARAMS) 180 181 /* Check whether two file descriptors refer to the same file. */ 182 183 extern int fdmatch (int fd1, int fd2); 184 185 /* Return the position of the first bit set in the argument. */ 186 /* Prototypes vary from system to system, so we only provide a 187 prototype on systems where we know that we need it. */ 188 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS 189 extern int ffs(int); 190 #endif 191 192 /* Get the working directory. The result is cached, so don't call 193 chdir() between calls to getpwd(). */ 194 195 extern char * getpwd (void); 196 197 /* Get the current time. */ 198 /* Prototypes vary from system to system, so we only provide a 199 prototype on systems where we know that we need it. */ 200 #ifdef __MINGW32__ 201 /* Forward declaration to avoid #include <sys/time.h>. */ 202 struct timeval; 203 extern int gettimeofday (struct timeval *, void *); 204 #endif 205 206 /* Get the amount of time the process has run, in microseconds. */ 207 208 extern long get_run_time (void); 209 210 /* Generate a relocated path to some installation directory. Allocates 211 return value using malloc. */ 212 213 extern char *make_relative_prefix (const char *, const char *, 214 const char *) ATTRIBUTE_MALLOC; 215 216 /* Generate a relocated path to some installation directory without 217 attempting to follow any soft links. Allocates 218 return value using malloc. */ 219 220 extern char *make_relative_prefix_ignore_links (const char *, const char *, 221 const char *) ATTRIBUTE_MALLOC; 222 223 /* Choose a temporary directory to use for scratch files. */ 224 225 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC; 226 227 /* Return a temporary file name or NULL if unable to create one. */ 228 229 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC; 230 231 /* Remove a link to a file unless it is special. */ 232 233 extern int unlink_if_ordinary (const char *); 234 235 /* Allocate memory filled with spaces. Allocates using malloc. */ 236 237 extern const char *spaces (int count); 238 239 /* Return the maximum error number for which strerror will return a 240 string. */ 241 242 extern int errno_max (void); 243 244 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns 245 "EINVAL"). */ 246 247 extern const char *strerrno (int); 248 249 /* Given the name of an errno value, return the value. */ 250 251 extern int strtoerrno (const char *); 252 253 /* ANSI's strerror(), but more robust. */ 254 255 extern char *xstrerror (int); 256 257 /* Return the maximum signal number for which strsignal will return a 258 string. */ 259 260 extern int signo_max (void); 261 262 /* Return a signal message string for a signal number 263 (e.g., strsignal (SIGHUP) returns something like "Hangup"). */ 264 /* This is commented out as it can conflict with one in system headers. 265 We still document its existence though. */ 266 267 /*extern const char *strsignal (int);*/ 268 269 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns 270 "SIGHUP"). */ 271 272 extern const char *strsigno (int); 273 274 /* Given the name of a signal, return its number. */ 275 276 extern int strtosigno (const char *); 277 278 /* Register a function to be run by xexit. Returns 0 on success. */ 279 280 extern int xatexit (void (*fn) (void)); 281 282 /* Exit, calling all the functions registered with xatexit. */ 283 284 extern void xexit (int status) ATTRIBUTE_NORETURN; 285 286 /* Set the program name used by xmalloc. */ 287 288 extern void xmalloc_set_program_name (const char *); 289 290 /* Report an allocation failure. */ 291 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN; 292 293 /* Allocate memory without fail. If malloc fails, this will print a 294 message to stderr (using the name set by xmalloc_set_program_name, 295 if any) and then call xexit. */ 296 297 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC; 298 299 /* Reallocate memory without fail. This works like xmalloc. Note, 300 realloc type functions are not suitable for attribute malloc since 301 they may return the same address across multiple calls. */ 302 303 extern void *xrealloc (void *, size_t); 304 305 /* Allocate memory without fail and set it to zero. This works like 306 xmalloc. */ 307 308 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC; 309 310 /* Copy a string into a memory buffer without fail. */ 311 312 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC; 313 314 /* Copy at most N characters from string into a buffer without fail. */ 315 316 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC; 317 318 /* Copy an existing memory buffer to a new memory buffer without fail. */ 319 320 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC; 321 322 /* Physical memory routines. Return values are in BYTES. */ 323 extern double physmem_total (void); 324 extern double physmem_available (void); 325 326 /* Compute the 32-bit CRC of a block of memory. */ 327 extern unsigned int xcrc32 (const unsigned char *, int, unsigned int); 328 329 /* These macros provide a K&R/C89/C++-friendly way of allocating structures 330 with nice encapsulation. The XDELETE*() macros are technically 331 superfluous, but provided here for symmetry. Using them consistently 332 makes it easier to update client code to use different allocators such 333 as new/delete and new[]/delete[]. */ 334 335 /* Scalar allocators. */ 336 337 #define XALLOCA(T) ((T *) alloca (sizeof (T))) 338 #define XNEW(T) ((T *) xmalloc (sizeof (T))) 339 #define XCNEW(T) ((T *) xcalloc (1, sizeof (T))) 340 #define XDUP(T, P) ((T *) xmemdup ((P), sizeof (T), sizeof (T))) 341 #define XDELETE(P) free ((void*) (P)) 342 343 /* Array allocators. */ 344 345 #define XALLOCAVEC(T, N) ((T *) alloca (sizeof (T) * (N))) 346 #define XNEWVEC(T, N) ((T *) xmalloc (sizeof (T) * (N))) 347 #define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T))) 348 #define XDUPVEC(T, P, N) ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N))) 349 #define XRESIZEVEC(T, P, N) ((T *) xrealloc ((void *) (P), sizeof (T) * (N))) 350 #define XDELETEVEC(P) free ((void*) (P)) 351 352 /* Allocators for variable-sized structures and raw buffers. */ 353 354 #define XALLOCAVAR(T, S) ((T *) alloca ((S))) 355 #define XNEWVAR(T, S) ((T *) xmalloc ((S))) 356 #define XCNEWVAR(T, S) ((T *) xcalloc (1, (S))) 357 #define XDUPVAR(T, P, S1, S2) ((T *) xmemdup ((P), (S1), (S2))) 358 #define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S))) 359 360 /* Type-safe obstack allocator. */ 361 362 #define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T))) 363 #define XOBNEWVEC(O, T, N) ((T *) obstack_alloc ((O), sizeof (T) * (N))) 364 #define XOBNEWVAR(O, T, S) ((T *) obstack_alloc ((O), (S))) 365 #define XOBFINISH(O, T) ((T) obstack_finish ((O))) 366 367 /* hex character manipulation routines */ 368 369 #define _hex_array_size 256 370 #define _hex_bad 99 371 extern const unsigned char _hex_value[_hex_array_size]; 372 extern void hex_init (void); 373 #define hex_p(c) (hex_value (c) != _hex_bad) 374 /* If you change this, note well: Some code relies on side effects in 375 the argument being performed exactly once. */ 376 #define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)]) 377 378 /* Flags for pex_init. These are bits to be or'ed together. */ 379 380 /* Record subprocess times, if possible. */ 381 #define PEX_RECORD_TIMES 0x1 382 383 /* Use pipes for communication between processes, if possible. */ 384 #define PEX_USE_PIPES 0x2 385 386 /* Save files used for communication between processes. */ 387 #define PEX_SAVE_TEMPS 0x4 388 389 /* Prepare to execute one or more programs, with standard output of 390 each program fed to standard input of the next. 391 FLAGS As above. 392 PNAME The name of the program to report in error messages. 393 TEMPBASE A base name to use for temporary files; may be NULL to 394 use a random name. 395 Returns NULL on error. */ 396 397 extern struct pex_obj *pex_init (int flags, const char *pname, 398 const char *tempbase); 399 400 /* Flags for pex_run. These are bits to be or'ed together. */ 401 402 /* Last program in pipeline. Standard output of program goes to 403 OUTNAME, or, if OUTNAME is NULL, to standard output of caller. Do 404 not set this if you want to call pex_read_output. After this is 405 set, pex_run may no longer be called with the same struct 406 pex_obj. */ 407 #define PEX_LAST 0x1 408 409 /* Search for program in executable search path. */ 410 #define PEX_SEARCH 0x2 411 412 /* OUTNAME is a suffix. */ 413 #define PEX_SUFFIX 0x4 414 415 /* Send program's standard error to standard output. */ 416 #define PEX_STDERR_TO_STDOUT 0x8 417 418 /* Input file should be opened in binary mode. This flag is ignored 419 on Unix. */ 420 #define PEX_BINARY_INPUT 0x10 421 422 /* Output file should be opened in binary mode. This flag is ignored 423 on Unix. For proper behaviour PEX_BINARY_INPUT and 424 PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using 425 PEX_BINARY_OUTPUT should be followed by a call using 426 PEX_BINARY_INPUT. */ 427 #define PEX_BINARY_OUTPUT 0x20 428 429 /* Capture stderr to a pipe. The output can be read by 430 calling pex_read_err and reading from the returned 431 FILE object. This flag may be specified only for 432 the last program in a pipeline. 433 434 This flag is supported only on Unix and Windows. */ 435 #define PEX_STDERR_TO_PIPE 0x40 436 437 /* Capture stderr in binary mode. This flag is ignored 438 on Unix. */ 439 #define PEX_BINARY_ERROR 0x80 440 441 442 /* Execute one program. Returns NULL on success. On error returns an 443 error string (typically just the name of a system call); the error 444 string is statically allocated. 445 446 OBJ Returned by pex_init. 447 448 FLAGS As above. 449 450 EXECUTABLE The program to execute. 451 452 ARGV NULL terminated array of arguments to pass to the program. 453 454 OUTNAME Sets the output file name as follows: 455 456 PEX_SUFFIX set (OUTNAME may not be NULL): 457 TEMPBASE parameter to pex_init not NULL: 458 Output file name is the concatenation of TEMPBASE 459 and OUTNAME. 460 TEMPBASE is NULL: 461 Output file name is a random file name ending in 462 OUTNAME. 463 PEX_SUFFIX not set: 464 OUTNAME not NULL: 465 Output file name is OUTNAME. 466 OUTNAME NULL, TEMPBASE not NULL: 467 Output file name is randomly chosen using 468 TEMPBASE. 469 OUTNAME NULL, TEMPBASE NULL: 470 Output file name is randomly chosen. 471 472 If PEX_LAST is not set, the output file name is the 473 name to use for a temporary file holding stdout, if 474 any (there will not be a file if PEX_USE_PIPES is set 475 and the system supports pipes). If a file is used, it 476 will be removed when no longer needed unless 477 PEX_SAVE_TEMPS is set. 478 479 If PEX_LAST is set, and OUTNAME is not NULL, standard 480 output is written to the output file name. The file 481 will not be removed. If PEX_LAST and PEX_SUFFIX are 482 both set, TEMPBASE may not be NULL. 483 484 ERRNAME If not NULL, this is the name of a file to which 485 standard error is written. If NULL, standard error of 486 the program is standard error of the caller. 487 488 ERR On an error return, *ERR is set to an errno value, or 489 to 0 if there is no relevant errno. 490 */ 491 492 extern const char *pex_run (struct pex_obj *obj, int flags, 493 const char *executable, char * const *argv, 494 const char *outname, const char *errname, 495 int *err); 496 497 /* As for pex_run (), but takes an extra parameter to enable the 498 environment for the child process to be specified. 499 500 ENV The environment for the child process, specified as 501 an array of character pointers. Each element of the 502 array should point to a string of the form VAR=VALUE, 503 with the exception of the last element which must be 504 a null pointer. 505 */ 506 507 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags, 508 const char *executable, 509 char * const *argv, 510 char * const *env, 511 const char *outname, 512 const char *errname, int *err); 513 514 /* Return a stream for a temporary file to pass to the first program 515 in the pipeline as input. The file name is chosen as for pex_run. 516 pex_run closes the file automatically; don't close it yourself. */ 517 518 extern FILE *pex_input_file (struct pex_obj *obj, int flags, 519 const char *in_name); 520 521 /* Return a stream for a pipe connected to the standard input of the 522 first program in the pipeline. You must have passed 523 `PEX_USE_PIPES' to `pex_init'. Close the returned stream 524 yourself. */ 525 526 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary); 527 528 /* Read the standard output of the last program to be executed. 529 pex_run can not be called after this. BINARY should be non-zero if 530 the file should be opened in binary mode; this is ignored on Unix. 531 Returns NULL on error. Don't call fclose on the returned FILE; it 532 will be closed by pex_free. */ 533 534 extern FILE *pex_read_output (struct pex_obj *, int binary); 535 536 /* Read the standard error of the last program to be executed. 537 pex_run can not be called after this. BINARY should be non-zero if 538 the file should be opened in binary mode; this is ignored on Unix. 539 Returns NULL on error. Don't call fclose on the returned FILE; it 540 will be closed by pex_free. */ 541 542 extern FILE *pex_read_err (struct pex_obj *, int binary); 543 544 /* Return exit status of all programs in VECTOR. COUNT indicates the 545 size of VECTOR. The status codes in the vector are in the order of 546 the calls to pex_run. Returns 0 on error, 1 on success. */ 547 548 extern int pex_get_status (struct pex_obj *, int count, int *vector); 549 550 /* Return times of all programs in VECTOR. COUNT indicates the size 551 of VECTOR. struct pex_time is really just struct timeval, but that 552 is not portable to all systems. Returns 0 on error, 1 on 553 success. */ 554 555 struct pex_time 556 { 557 unsigned long user_seconds; 558 unsigned long user_microseconds; 559 unsigned long system_seconds; 560 unsigned long system_microseconds; 561 }; 562 563 extern int pex_get_times (struct pex_obj *, int count, 564 struct pex_time *vector); 565 566 /* Clean up a pex_obj. If you have not called pex_get_times or 567 pex_get_status, this will try to kill the subprocesses. */ 568 569 extern void pex_free (struct pex_obj *); 570 571 /* Just execute one program. Return value is as for pex_run. 572 FLAGS Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT. 573 EXECUTABLE As for pex_run. 574 ARGV As for pex_run. 575 PNAME As for pex_init. 576 OUTNAME As for pex_run when PEX_LAST is set. 577 ERRNAME As for pex_run. 578 STATUS Set to exit status on success. 579 ERR As for pex_run. 580 */ 581 582 extern const char *pex_one (int flags, const char *executable, 583 char * const *argv, const char *pname, 584 const char *outname, const char *errname, 585 int *status, int *err); 586 587 /* pexecute and pwait are the old pexecute interface, still here for 588 backward compatibility. Don't use these for new code. Instead, 589 use pex_init/pex_run/pex_get_status/pex_free, or pex_one. */ 590 591 /* Definitions used by the pexecute routine. */ 592 593 #define PEXECUTE_FIRST 1 594 #define PEXECUTE_LAST 2 595 #define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST) 596 #define PEXECUTE_SEARCH 4 597 #define PEXECUTE_VERBOSE 8 598 599 /* Execute a program. */ 600 601 extern int pexecute (const char *, char * const *, const char *, 602 const char *, char **, char **, int); 603 604 /* Wait for pexecute to finish. */ 605 606 extern int pwait (int, int *, int); 607 608 #if !HAVE_DECL_ASPRINTF 609 /* Like sprintf but provides a pointer to malloc'd storage, which must 610 be freed by the caller. */ 611 612 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2; 613 #endif 614 615 #if !HAVE_DECL_VASPRINTF 616 /* Like vsprintf but provides a pointer to malloc'd storage, which 617 must be freed by the caller. */ 618 619 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0); 620 #endif 621 622 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF 623 /* Like sprintf but prints at most N characters. */ 624 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3; 625 #endif 626 627 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF 628 /* Like vsprintf but prints at most N characters. */ 629 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0); 630 #endif 631 632 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP 633 /* Compare version strings. */ 634 extern int strverscmp (const char *, const char *); 635 #endif 636 637 /* Set the title of a process */ 638 extern void setproctitle (const char *name, ...); 639 640 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 641 642 /* Drastically simplified alloca configurator. If we're using GCC, 643 we use __builtin_alloca; otherwise we use the C alloca. The C 644 alloca is always available. You can override GCC by defining 645 USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is 646 also set/unset as it is often used to indicate whether code needs 647 to call alloca(0). */ 648 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC; 649 #undef alloca 650 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA 651 # define alloca(x) __builtin_alloca(x) 652 # undef C_ALLOCA 653 # define ASTRDUP(X) \ 654 (__extension__ ({ const char *const libiberty_optr = (X); \ 655 const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \ 656 char *const libiberty_nptr = (char *const) alloca (libiberty_len); \ 657 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); })) 658 #else 659 # define alloca(x) C_alloca(x) 660 # undef USE_C_ALLOCA 661 # define USE_C_ALLOCA 1 662 # undef C_ALLOCA 663 # define C_ALLOCA 1 664 extern const char *libiberty_optr; 665 extern char *libiberty_nptr; 666 extern unsigned long libiberty_len; 667 # define ASTRDUP(X) \ 668 (libiberty_optr = (X), \ 669 libiberty_len = strlen (libiberty_optr) + 1, \ 670 libiberty_nptr = (char *) alloca (libiberty_len), \ 671 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len)) 672 #endif 673 674 #ifdef __cplusplus 675 } 676 #endif 677 678 679 #endif /* ! defined (LIBIBERTY_H) */ 680