1 /* Function declarations for libiberty. 2 3 Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 4 2006, 2007, 2008, 2009, 2010, 2011 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 number of elements in argv. */ 95 96 extern int countargv (char**); 97 98 /* Return the last component of a path name. Note that we can't use a 99 prototype here because the parameter is declared inconsistently 100 across different systems, sometimes as "char *" and sometimes as 101 "const char *" */ 102 103 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is 104 undefined, we haven't run the autoconf check so provide the 105 declaration without arguments. If it is 0, we checked and failed 106 to find the declaration so provide a fully prototyped one. If it 107 is 1, we found it so don't provide any declaration at all. */ 108 #if !HAVE_DECL_BASENAME 109 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME) 110 extern char *basename (const char *); 111 #else 112 /* Do not allow basename to be used if there is no prototype seen. We 113 either need to use the above prototype or have one from 114 autoconf which would result in HAVE_DECL_BASENAME being set. */ 115 #define basename basename_cannot_be_used_without_a_prototype 116 #endif 117 #endif 118 119 /* A well-defined basename () that is always compiled in. */ 120 121 extern const char *lbasename (const char *); 122 123 /* Same, but assumes DOS semantics (drive name, backslash is also a 124 dir separator) regardless of host. */ 125 126 extern const char *dos_lbasename (const char *); 127 128 /* Same, but assumes Unix semantics (absolute paths always start with 129 a slash, only forward slash is accepted as dir separator) 130 regardless of host. */ 131 132 extern const char *unix_lbasename (const char *); 133 134 /* A well-defined realpath () that is always compiled in. */ 135 136 extern char *lrealpath (const char *); 137 138 /* Concatenate an arbitrary number of strings. You must pass NULL as 139 the last argument of this function, to terminate the list of 140 strings. Allocates memory using xmalloc. */ 141 142 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL; 143 144 /* Concatenate an arbitrary number of strings. You must pass NULL as 145 the last argument of this function, to terminate the list of 146 strings. Allocates memory using xmalloc. The first argument is 147 not one of the strings to be concatenated, but if not NULL is a 148 pointer to be freed after the new string is created, similar to the 149 way xrealloc works. */ 150 151 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL; 152 153 /* Determine the length of concatenating an arbitrary number of 154 strings. You must pass NULL as the last argument of this function, 155 to terminate the list of strings. */ 156 157 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL; 158 159 /* Concatenate an arbitrary number of strings into a SUPPLIED area of 160 memory. You must pass NULL as the last argument of this function, 161 to terminate the list of strings. The supplied memory is assumed 162 to be large enough. */ 163 164 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL; 165 166 /* Concatenate an arbitrary number of strings into a GLOBAL area of 167 memory. You must pass NULL as the last argument of this function, 168 to terminate the list of strings. The supplied memory is assumed 169 to be large enough. */ 170 171 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL; 172 173 /* This is the global area used by concat_copy2. */ 174 175 extern char *libiberty_concat_ptr; 176 177 /* Concatenate an arbitrary number of strings. You must pass NULL as 178 the last argument of this function, to terminate the list of 179 strings. Allocates memory using alloca. The arguments are 180 evaluated twice! */ 181 #define ACONCAT(ACONCAT_PARAMS) \ 182 (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \ 183 concat_copy2 ACONCAT_PARAMS) 184 185 /* Check whether two file descriptors refer to the same file. */ 186 187 extern int fdmatch (int fd1, int fd2); 188 189 /* Return the position of the first bit set in the argument. */ 190 /* Prototypes vary from system to system, so we only provide a 191 prototype on systems where we know that we need it. */ 192 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS 193 extern int ffs(int); 194 #endif 195 196 /* Get the working directory. The result is cached, so don't call 197 chdir() between calls to getpwd(). */ 198 199 extern char * getpwd (void); 200 201 /* Get the current time. */ 202 /* Prototypes vary from system to system, so we only provide a 203 prototype on systems where we know that we need it. */ 204 #ifdef __MINGW32__ 205 /* Forward declaration to avoid #include <sys/time.h>. */ 206 struct timeval; 207 extern int gettimeofday (struct timeval *, void *); 208 #endif 209 210 /* Get the amount of time the process has run, in microseconds. */ 211 212 extern long get_run_time (void); 213 214 /* Generate a relocated path to some installation directory. Allocates 215 return value using malloc. */ 216 217 extern char *make_relative_prefix (const char *, const char *, 218 const char *) ATTRIBUTE_MALLOC; 219 220 /* Generate a relocated path to some installation directory without 221 attempting to follow any soft links. Allocates 222 return value using malloc. */ 223 224 extern char *make_relative_prefix_ignore_links (const char *, const char *, 225 const char *) ATTRIBUTE_MALLOC; 226 227 /* Choose a temporary directory to use for scratch files. */ 228 229 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC; 230 231 /* Return a temporary file name or NULL if unable to create one. */ 232 233 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC; 234 235 /* Remove a link to a file unless it is special. */ 236 237 extern int unlink_if_ordinary (const char *); 238 239 /* Allocate memory filled with spaces. Allocates using malloc. */ 240 241 extern const char *spaces (int count); 242 243 /* Return the maximum error number for which strerror will return a 244 string. */ 245 246 extern int errno_max (void); 247 248 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns 249 "EINVAL"). */ 250 251 extern const char *strerrno (int); 252 253 /* Given the name of an errno value, return the value. */ 254 255 extern int strtoerrno (const char *); 256 257 /* ANSI's strerror(), but more robust. */ 258 259 extern char *xstrerror (int); 260 261 /* Return the maximum signal number for which strsignal will return a 262 string. */ 263 264 extern int signo_max (void); 265 266 /* Return a signal message string for a signal number 267 (e.g., strsignal (SIGHUP) returns something like "Hangup"). */ 268 /* This is commented out as it can conflict with one in system headers. 269 We still document its existence though. */ 270 271 /*extern const char *strsignal (int);*/ 272 273 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns 274 "SIGHUP"). */ 275 276 extern const char *strsigno (int); 277 278 /* Given the name of a signal, return its number. */ 279 280 extern int strtosigno (const char *); 281 282 /* Register a function to be run by xexit. Returns 0 on success. */ 283 284 extern int xatexit (void (*fn) (void)); 285 286 /* Exit, calling all the functions registered with xatexit. */ 287 288 extern void xexit (int status) ATTRIBUTE_NORETURN; 289 290 /* Set the program name used by xmalloc. */ 291 292 extern void xmalloc_set_program_name (const char *); 293 294 /* Report an allocation failure. */ 295 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN; 296 297 /* Allocate memory without fail. If malloc fails, this will print a 298 message to stderr (using the name set by xmalloc_set_program_name, 299 if any) and then call xexit. */ 300 301 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC; 302 303 /* Reallocate memory without fail. This works like xmalloc. Note, 304 realloc type functions are not suitable for attribute malloc since 305 they may return the same address across multiple calls. */ 306 307 extern void *xrealloc (void *, size_t); 308 309 /* Allocate memory without fail and set it to zero. This works like 310 xmalloc. */ 311 312 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC; 313 314 /* Copy a string into a memory buffer without fail. */ 315 316 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC; 317 318 /* Copy at most N characters from string into a buffer without fail. */ 319 320 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC; 321 322 /* Copy an existing memory buffer to a new memory buffer without fail. */ 323 324 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC; 325 326 /* Physical memory routines. Return values are in BYTES. */ 327 extern double physmem_total (void); 328 extern double physmem_available (void); 329 330 /* Compute the 32-bit CRC of a block of memory. */ 331 extern unsigned int xcrc32 (const unsigned char *, int, unsigned int); 332 333 /* These macros provide a K&R/C89/C++-friendly way of allocating structures 334 with nice encapsulation. The XDELETE*() macros are technically 335 superfluous, but provided here for symmetry. Using them consistently 336 makes it easier to update client code to use different allocators such 337 as new/delete and new[]/delete[]. */ 338 339 /* Scalar allocators. */ 340 341 #define XALLOCA(T) ((T *) alloca (sizeof (T))) 342 #define XNEW(T) ((T *) xmalloc (sizeof (T))) 343 #define XCNEW(T) ((T *) xcalloc (1, sizeof (T))) 344 #define XDUP(T, P) ((T *) xmemdup ((P), sizeof (T), sizeof (T))) 345 #define XDELETE(P) free ((void*) (P)) 346 347 /* Array allocators. */ 348 349 #define XALLOCAVEC(T, N) ((T *) alloca (sizeof (T) * (N))) 350 #define XNEWVEC(T, N) ((T *) xmalloc (sizeof (T) * (N))) 351 #define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T))) 352 #define XDUPVEC(T, P, N) ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N))) 353 #define XRESIZEVEC(T, P, N) ((T *) xrealloc ((void *) (P), sizeof (T) * (N))) 354 #define XDELETEVEC(P) free ((void*) (P)) 355 356 /* Allocators for variable-sized structures and raw buffers. */ 357 358 #define XALLOCAVAR(T, S) ((T *) alloca ((S))) 359 #define XNEWVAR(T, S) ((T *) xmalloc ((S))) 360 #define XCNEWVAR(T, S) ((T *) xcalloc (1, (S))) 361 #define XDUPVAR(T, P, S1, S2) ((T *) xmemdup ((P), (S1), (S2))) 362 #define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S))) 363 364 /* Type-safe obstack allocator. */ 365 366 #define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T))) 367 #define XOBNEWVEC(O, T, N) ((T *) obstack_alloc ((O), sizeof (T) * (N))) 368 #define XOBNEWVAR(O, T, S) ((T *) obstack_alloc ((O), (S))) 369 #define XOBFINISH(O, T) ((T) obstack_finish ((O))) 370 371 /* hex character manipulation routines */ 372 373 #define _hex_array_size 256 374 #define _hex_bad 99 375 extern const unsigned char _hex_value[_hex_array_size]; 376 extern void hex_init (void); 377 #define hex_p(c) (hex_value (c) != _hex_bad) 378 /* If you change this, note well: Some code relies on side effects in 379 the argument being performed exactly once. */ 380 #define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)]) 381 382 /* Flags for pex_init. These are bits to be or'ed together. */ 383 384 /* Record subprocess times, if possible. */ 385 #define PEX_RECORD_TIMES 0x1 386 387 /* Use pipes for communication between processes, if possible. */ 388 #define PEX_USE_PIPES 0x2 389 390 /* Save files used for communication between processes. */ 391 #define PEX_SAVE_TEMPS 0x4 392 393 /* Prepare to execute one or more programs, with standard output of 394 each program fed to standard input of the next. 395 FLAGS As above. 396 PNAME The name of the program to report in error messages. 397 TEMPBASE A base name to use for temporary files; may be NULL to 398 use a random name. 399 Returns NULL on error. */ 400 401 extern struct pex_obj *pex_init (int flags, const char *pname, 402 const char *tempbase); 403 404 /* Flags for pex_run. These are bits to be or'ed together. */ 405 406 /* Last program in pipeline. Standard output of program goes to 407 OUTNAME, or, if OUTNAME is NULL, to standard output of caller. Do 408 not set this if you want to call pex_read_output. After this is 409 set, pex_run may no longer be called with the same struct 410 pex_obj. */ 411 #define PEX_LAST 0x1 412 413 /* Search for program in executable search path. */ 414 #define PEX_SEARCH 0x2 415 416 /* OUTNAME is a suffix. */ 417 #define PEX_SUFFIX 0x4 418 419 /* Send program's standard error to standard output. */ 420 #define PEX_STDERR_TO_STDOUT 0x8 421 422 /* Input file should be opened in binary mode. This flag is ignored 423 on Unix. */ 424 #define PEX_BINARY_INPUT 0x10 425 426 /* Output file should be opened in binary mode. This flag is ignored 427 on Unix. For proper behaviour PEX_BINARY_INPUT and 428 PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using 429 PEX_BINARY_OUTPUT should be followed by a call using 430 PEX_BINARY_INPUT. */ 431 #define PEX_BINARY_OUTPUT 0x20 432 433 /* Capture stderr to a pipe. The output can be read by 434 calling pex_read_err and reading from the returned 435 FILE object. This flag may be specified only for 436 the last program in a pipeline. 437 438 This flag is supported only on Unix and Windows. */ 439 #define PEX_STDERR_TO_PIPE 0x40 440 441 /* Capture stderr in binary mode. This flag is ignored 442 on Unix. */ 443 #define PEX_BINARY_ERROR 0x80 444 445 446 /* Execute one program. Returns NULL on success. On error returns an 447 error string (typically just the name of a system call); the error 448 string is statically allocated. 449 450 OBJ Returned by pex_init. 451 452 FLAGS As above. 453 454 EXECUTABLE The program to execute. 455 456 ARGV NULL terminated array of arguments to pass to the program. 457 458 OUTNAME Sets the output file name as follows: 459 460 PEX_SUFFIX set (OUTNAME may not be NULL): 461 TEMPBASE parameter to pex_init not NULL: 462 Output file name is the concatenation of TEMPBASE 463 and OUTNAME. 464 TEMPBASE is NULL: 465 Output file name is a random file name ending in 466 OUTNAME. 467 PEX_SUFFIX not set: 468 OUTNAME not NULL: 469 Output file name is OUTNAME. 470 OUTNAME NULL, TEMPBASE not NULL: 471 Output file name is randomly chosen using 472 TEMPBASE. 473 OUTNAME NULL, TEMPBASE NULL: 474 Output file name is randomly chosen. 475 476 If PEX_LAST is not set, the output file name is the 477 name to use for a temporary file holding stdout, if 478 any (there will not be a file if PEX_USE_PIPES is set 479 and the system supports pipes). If a file is used, it 480 will be removed when no longer needed unless 481 PEX_SAVE_TEMPS is set. 482 483 If PEX_LAST is set, and OUTNAME is not NULL, standard 484 output is written to the output file name. The file 485 will not be removed. If PEX_LAST and PEX_SUFFIX are 486 both set, TEMPBASE may not be NULL. 487 488 ERRNAME If not NULL, this is the name of a file to which 489 standard error is written. If NULL, standard error of 490 the program is standard error of the caller. 491 492 ERR On an error return, *ERR is set to an errno value, or 493 to 0 if there is no relevant errno. 494 */ 495 496 extern const char *pex_run (struct pex_obj *obj, int flags, 497 const char *executable, char * const *argv, 498 const char *outname, const char *errname, 499 int *err); 500 501 /* As for pex_run (), but takes an extra parameter to enable the 502 environment for the child process to be specified. 503 504 ENV The environment for the child process, specified as 505 an array of character pointers. Each element of the 506 array should point to a string of the form VAR=VALUE, 507 with the exception of the last element which must be 508 a null pointer. 509 */ 510 511 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags, 512 const char *executable, 513 char * const *argv, 514 char * const *env, 515 const char *outname, 516 const char *errname, int *err); 517 518 /* Return a stream for a temporary file to pass to the first program 519 in the pipeline as input. The file name is chosen as for pex_run. 520 pex_run closes the file automatically; don't close it yourself. */ 521 522 extern FILE *pex_input_file (struct pex_obj *obj, int flags, 523 const char *in_name); 524 525 /* Return a stream for a pipe connected to the standard input of the 526 first program in the pipeline. You must have passed 527 `PEX_USE_PIPES' to `pex_init'. Close the returned stream 528 yourself. */ 529 530 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary); 531 532 /* Read the standard output of the last program to be executed. 533 pex_run can not be called after this. BINARY should be non-zero if 534 the file should be opened in binary mode; this is ignored on Unix. 535 Returns NULL on error. Don't call fclose on the returned FILE; it 536 will be closed by pex_free. */ 537 538 extern FILE *pex_read_output (struct pex_obj *, int binary); 539 540 /* Read the standard error of the last program to be executed. 541 pex_run can not be called after this. BINARY should be non-zero if 542 the file should be opened in binary mode; this is ignored on Unix. 543 Returns NULL on error. Don't call fclose on the returned FILE; it 544 will be closed by pex_free. */ 545 546 extern FILE *pex_read_err (struct pex_obj *, int binary); 547 548 /* Return exit status of all programs in VECTOR. COUNT indicates the 549 size of VECTOR. The status codes in the vector are in the order of 550 the calls to pex_run. Returns 0 on error, 1 on success. */ 551 552 extern int pex_get_status (struct pex_obj *, int count, int *vector); 553 554 /* Return times of all programs in VECTOR. COUNT indicates the size 555 of VECTOR. struct pex_time is really just struct timeval, but that 556 is not portable to all systems. Returns 0 on error, 1 on 557 success. */ 558 559 struct pex_time 560 { 561 unsigned long user_seconds; 562 unsigned long user_microseconds; 563 unsigned long system_seconds; 564 unsigned long system_microseconds; 565 }; 566 567 extern int pex_get_times (struct pex_obj *, int count, 568 struct pex_time *vector); 569 570 /* Clean up a pex_obj. If you have not called pex_get_times or 571 pex_get_status, this will try to kill the subprocesses. */ 572 573 extern void pex_free (struct pex_obj *); 574 575 /* Just execute one program. Return value is as for pex_run. 576 FLAGS Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT. 577 EXECUTABLE As for pex_run. 578 ARGV As for pex_run. 579 PNAME As for pex_init. 580 OUTNAME As for pex_run when PEX_LAST is set. 581 ERRNAME As for pex_run. 582 STATUS Set to exit status on success. 583 ERR As for pex_run. 584 */ 585 586 extern const char *pex_one (int flags, const char *executable, 587 char * const *argv, const char *pname, 588 const char *outname, const char *errname, 589 int *status, int *err); 590 591 /* pexecute and pwait are the old pexecute interface, still here for 592 backward compatibility. Don't use these for new code. Instead, 593 use pex_init/pex_run/pex_get_status/pex_free, or pex_one. */ 594 595 /* Definitions used by the pexecute routine. */ 596 597 #define PEXECUTE_FIRST 1 598 #define PEXECUTE_LAST 2 599 #define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST) 600 #define PEXECUTE_SEARCH 4 601 #define PEXECUTE_VERBOSE 8 602 603 /* Execute a program. */ 604 605 extern int pexecute (const char *, char * const *, const char *, 606 const char *, char **, char **, int); 607 608 /* Wait for pexecute to finish. */ 609 610 extern int pwait (int, int *, int); 611 612 #if !HAVE_DECL_ASPRINTF 613 /* Like sprintf but provides a pointer to malloc'd storage, which must 614 be freed by the caller. */ 615 616 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2; 617 #endif 618 619 #if !HAVE_DECL_VASPRINTF 620 /* Like vsprintf but provides a pointer to malloc'd storage, which 621 must be freed by the caller. */ 622 623 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0); 624 #endif 625 626 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF 627 /* Like sprintf but prints at most N characters. */ 628 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3; 629 #endif 630 631 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF 632 /* Like vsprintf but prints at most N characters. */ 633 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0); 634 #endif 635 636 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP 637 /* Compare version strings. */ 638 extern int strverscmp (const char *, const char *); 639 #endif 640 641 /* Set the title of a process */ 642 extern void setproctitle (const char *name, ...); 643 644 /* Increase stack limit if possible. */ 645 extern void stack_limit_increase (unsigned long); 646 647 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 648 649 /* Drastically simplified alloca configurator. If we're using GCC, 650 we use __builtin_alloca; otherwise we use the C alloca. The C 651 alloca is always available. You can override GCC by defining 652 USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is 653 also set/unset as it is often used to indicate whether code needs 654 to call alloca(0). */ 655 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC; 656 #undef alloca 657 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA 658 # define alloca(x) __builtin_alloca(x) 659 # undef C_ALLOCA 660 # define ASTRDUP(X) \ 661 (__extension__ ({ const char *const libiberty_optr = (X); \ 662 const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \ 663 char *const libiberty_nptr = (char *const) alloca (libiberty_len); \ 664 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); })) 665 #else 666 # define alloca(x) C_alloca(x) 667 # undef USE_C_ALLOCA 668 # define USE_C_ALLOCA 1 669 # undef C_ALLOCA 670 # define C_ALLOCA 1 671 extern const char *libiberty_optr; 672 extern char *libiberty_nptr; 673 extern unsigned long libiberty_len; 674 # define ASTRDUP(X) \ 675 (libiberty_optr = (X), \ 676 libiberty_len = strlen (libiberty_optr) + 1, \ 677 libiberty_nptr = (char *) alloca (libiberty_len), \ 678 (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len)) 679 #endif 680 681 #ifdef __cplusplus 682 } 683 #endif 684 685 686 #endif /* ! defined (LIBIBERTY_H) */ 687
