lib/replace/replace.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    macros to go along with the lib/replace/ portability layer code
   5
   6    Copyright (C) Andrew Tridgell 2005
   7    Copyright (C) Jelmer Vernooij 2006-2008
   8    Copyright (C) Jeremy Allison 2007.
   9
  10      ** NOTE! The following LGPL license applies to the replace
  11      ** library. This does NOT imply that all of Samba is released
  12      ** under the LGPL
  13
  14    This library is free software; you can redistribute it and/or
  15    modify it under the terms of the GNU Lesser General Public
  16    License as published by the Free Software Foundation; either
  17    version 3 of the License, or (at your option) any later version.
  18
  19    This library is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22    Lesser General Public License for more details.
  23
  24    You should have received a copy of the GNU Lesser General Public
  25    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  26 */
  27
  28 #ifndef _LIBREPLACE_REPLACE_H
  29 #define _LIBREPLACE_REPLACE_H
  30
  31 #ifndef NO_CONFIG_H
  32 #include "config.h"
  33 #endif
  34
  35 #ifdef HAVE_STANDARDS_H
  36 #include <standards.h>
  37 #endif
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <stdarg.h>
  42 #include <errno.h>
  43
  44 #if defined(_MSC_VER) || defined(__MINGW32__)
  45 #include "win32_replace.h"
  46 #endif
  47
  48
  49 #ifdef HAVE_STDINT_H
  50 #include <stdint.h>
  51 /* force off HAVE_INTTYPES_H so that roken doesn't try to include both,
  52    which causes a warning storm on irix */
  53 #undef HAVE_INTTYPES_H
  54 #elif HAVE_INTTYPES_H
  55 #define __STDC_FORMAT_MACROS
  56 #include <inttypes.h>
  57 #endif
  58
  59 #ifdef HAVE_MALLOC_H
  60 #include <malloc.h>
  61 #endif
  62
  63 #ifndef __PRI64_PREFIX
  64 # if __WORDSIZE == 64
  65 #  define __PRI64_PREFIX        "l"
  66 # else
  67 #  define __PRI64_PREFIX        "ll"
  68 # endif
  69 #endif
  70
  71 /* Decimal notation.  */
  72 #ifndef PRId8
  73 # define PRId8          "d"
  74 #endif
  75 #ifndef PRId16
  76 # define PRId16         "d"
  77 #endif
  78 #ifndef PRId32
  79 # define PRId32         "d"
  80 #endif
  81 #ifndef PRId64
  82 # define PRId64         __PRI64_PREFIX "d"
  83 #endif
  84
  85 #ifndef PRIi8
  86 # define PRIi8          "i"
  87 #endif
  88 #ifndef PRIi16
  89 # define PRIi16         "i"
  90 #endif
  91 #ifndef PRIi32
  92 # define PRIi32         "i"
  93 #endif
  94 #ifndef PRIi64
  95 # define PRIi64         __PRI64_PREFIX "i"
  96 #endif
  97
  98 #ifndef PRIu8
  99 # define PRIu8          "u"
 100 #endif
 101 #ifndef PRIu16
 102 # define PRIu16         "u"
 103 #endif
 104 #ifndef PRIu32
 105 # define PRIu32         "u"
 106 #endif
 107 #ifndef PRIu64
 108 # define PRIu64         __PRI64_PREFIX "u"
 109 #endif
 110
 111 #ifdef HAVE_BSD_STRING_H
 112 #include <bsd/string.h>
 113 #endif
 114
 115 #ifdef HAVE_BSD_UNISTD_H
 116 #include <bsd/unistd.h>
 117 #endif
 118
 119 #ifdef HAVE_STRING_H
 120 #include <string.h>
 121 #endif
 122
 123 #ifdef HAVE_STRINGS_H
 124 #include <strings.h>
 125 #endif
 126
 127 #ifdef HAVE_SYS_TYPES_H
 128 #include <sys/types.h>
 129 #endif
 130
 131 #if STDC_HEADERS
 132 #include <stdlib.h>
 133 #include <stddef.h>
 134 #endif
 135
 136 #ifdef HAVE_LINUX_TYPES_H
 137 /*
 138  * This is needed as some broken header files require this to be included early
 139  */
 140 #include <linux/types.h>
 141 #endif
 142
 143 #ifndef HAVE_STRERROR
 144 extern char *sys_errlist[];
 145 #define strerror(i) sys_errlist[i]
 146 #endif
 147
 148 #ifndef HAVE_ERRNO_DECL
 149 extern int errno;
 150 #endif
 151
 152 #ifndef HAVE_STRDUP
 153 #define strdup rep_strdup
 154 char *rep_strdup(const char *s);
 155 #endif
 156
 157 #ifndef HAVE_MEMMOVE
 158 #define memmove rep_memmove
 159 void *rep_memmove(void *dest,const void *src,int size);
 160 #endif
 161
 162 #ifndef HAVE_MEMMEM
 163 #define memmem rep_memmem
 164 void *rep_memmem(const void *haystack, size_t haystacklen,
 165                  const void *needle, size_t needlelen);
 166 #endif
 167
 168 #ifndef HAVE_MEMALIGN
 169 #define memalign rep_memalign
 170 void *rep_memalign(size_t boundary, size_t size);
 171 #endif
 172
 173 #ifndef HAVE_MKTIME
 174 #define mktime rep_mktime
 175 /* prototype is in "system/time.h" */
 176 #endif
 177
 178 #ifndef HAVE_TIMEGM
 179 #define timegm rep_timegm
 180 /* prototype is in "system/time.h" */
 181 #endif
 182
 183 #ifndef HAVE_UTIME
 184 #define utime rep_utime
 185 /* prototype is in "system/time.h" */
 186 #endif
 187
 188 #ifndef HAVE_UTIMES
 189 #define utimes rep_utimes
 190 /* prototype is in "system/time.h" */
 191 #endif
 192
 193 #ifndef HAVE_STRLCPY
 194 #define strlcpy rep_strlcpy
 195 size_t rep_strlcpy(char *d, const char *s, size_t bufsize);
 196 #endif
 197
 198 #ifndef HAVE_STRLCAT
 199 #define strlcat rep_strlcat
 200 size_t rep_strlcat(char *d, const char *s, size_t bufsize);
 201 #endif
 202
 203 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
 204 #undef HAVE_STRNDUP
 205 #define strndup rep_strndup
 206 char *rep_strndup(const char *s, size_t n);
 207 #endif
 208
 209 #if (defined(BROKEN_STRNLEN) || !defined(HAVE_STRNLEN))
 210 #undef HAVE_STRNLEN
 211 #define strnlen rep_strnlen
 212 size_t rep_strnlen(const char *s, size_t n);
 213 #endif
 214
 215 #if !HAVE_DECL_ENVIRON
 216 #ifdef __APPLE__
 217 #include <crt_externs.h>
 218 #define environ (*_NSGetEnviron())
 219 #else
 220 extern char **environ;
 221 #endif
 222 #endif
 223
 224 #ifndef HAVE_SETENV
 225 #define setenv rep_setenv
 226 int rep_setenv(const char *name, const char *value, int overwrite);
 227 #else
 228 #ifndef HAVE_SETENV_DECL
 229 int setenv(const char *name, const char *value, int overwrite);
 230 #endif
 231 #endif
 232
 233 #ifndef HAVE_UNSETENV
 234 #define unsetenv rep_unsetenv
 235 int rep_unsetenv(const char *name);
 236 #endif
 237
 238 #ifndef HAVE_SETEUID
 239 #define seteuid rep_seteuid
 240 int rep_seteuid(uid_t);
 241 #endif
 242
 243 #ifndef HAVE_SETEGID
 244 #define setegid rep_setegid
 245 int rep_setegid(gid_t);
 246 #endif
 247
 248 #if (defined(USE_SETRESUID) && !defined(HAVE_SETRESUID_DECL))
 249 /* stupid glibc */
 250 int setresuid(uid_t ruid, uid_t euid, uid_t suid);
 251 #endif
 252 #if (defined(USE_SETRESUID) && !defined(HAVE_SETRESGID_DECL))
 253 int setresgid(gid_t rgid, gid_t egid, gid_t sgid);
 254 #endif
 255
 256 #ifndef HAVE_CHOWN
 257 #define chown rep_chown
 258 int rep_chown(const char *path, uid_t uid, gid_t gid);
 259 #endif
 260
 261 #ifndef HAVE_CHROOT
 262 #define chroot rep_chroot
 263 int rep_chroot(const char *dirname);
 264 #endif
 265
 266 #ifndef HAVE_LINK
 267 #define link rep_link
 268 int rep_link(const char *oldpath, const char *newpath);
 269 #endif
 270
 271 #ifndef HAVE_READLINK
 272 #define readlink rep_readlink
 273 ssize_t rep_readlink(const char *path, char *buf, size_t bufsize);
 274 #endif
 275
 276 #ifndef HAVE_SYMLINK
 277 #define symlink rep_symlink
 278 int rep_symlink(const char *oldpath, const char *newpath);
 279 #endif
 280
 281 #ifndef HAVE_REALPATH
 282 #define realpath rep_realpath
 283 char *rep_realpath(const char *path, char *resolved_path);
 284 #endif
 285
 286 #ifndef HAVE_LCHOWN
 287 #define lchown rep_lchown
 288 int rep_lchown(const char *fname,uid_t uid,gid_t gid);
 289 #endif
 290
 291 #ifdef HAVE_UNIX_H
 292 #include <unix.h>
 293 #endif
 294
 295 #ifndef HAVE_SETLINEBUF
 296 #define setlinebuf rep_setlinebuf
 297 void rep_setlinebuf(FILE *);
 298 #endif
 299
 300 #ifndef HAVE_STRCASESTR
 301 #define strcasestr rep_strcasestr
 302 char *rep_strcasestr(const char *haystack, const char *needle);
 303 #endif
 304
 305 #ifndef HAVE_STRTOK_R
 306 #define strtok_r rep_strtok_r
 307 char *rep_strtok_r(char *s, const char *delim, char **save_ptr);
 308 #endif
 309
 310
 311
 312 #ifndef HAVE_STRTOLL
 313 #define strtoll rep_strtoll
 314 long long int rep_strtoll(const char *str, char **endptr, int base);
 315 #else
 316 #ifdef HAVE_BSD_STRTOLL
 317 #define strtoll rep_strtoll
 318 long long int rep_strtoll(const char *str, char **endptr, int base);
 319 #endif
 320 #endif
 321
 322 #ifndef HAVE_STRTOULL
 323 #define strtoull rep_strtoull
 324 unsigned long long int rep_strtoull(const char *str, char **endptr, int base);
 325 #else
 326 #ifdef HAVE_BSD_STRTOLL /* yes, it's not HAVE_BSD_STRTOULL */
 327 #define strtoull rep_strtoull
 328 unsigned long long int rep_strtoull(const char *str, char **endptr, int base);
 329 #endif
 330 #endif
 331
 332 #ifndef HAVE_FTRUNCATE
 333 #define ftruncate rep_ftruncate
 334 int rep_ftruncate(int,off_t);
 335 #endif
 336
 337 #ifndef HAVE_INITGROUPS
 338 #define initgroups rep_initgroups
 339 int rep_initgroups(char *name, gid_t id);
 340 #endif
 341
 342 #if !defined(HAVE_BZERO) && defined(HAVE_MEMSET)
 343 #define bzero(a,b) memset((a),'\0',(b))
 344 #endif
 345
 346 #ifndef HAVE_DLERROR
 347 #define dlerror rep_dlerror
 348 char *rep_dlerror(void);
 349 #endif
 350
 351 #ifndef HAVE_DLOPEN
 352 #define dlopen rep_dlopen
 353 #ifdef DLOPEN_TAKES_UNSIGNED_FLAGS
 354 void *rep_dlopen(const char *name, unsigned int flags);
 355 #else
 356 void *rep_dlopen(const char *name, int flags);
 357 #endif
 358 #endif
 359
 360 #ifndef HAVE_DLSYM
 361 #define dlsym rep_dlsym
 362 void *rep_dlsym(void *handle, const char *symbol);
 363 #endif
 364
 365 #ifndef HAVE_DLCLOSE
 366 #define dlclose rep_dlclose
 367 int rep_dlclose(void *handle);
 368 #endif
 369
 370 #ifndef HAVE_SOCKETPAIR
 371 #define socketpair rep_socketpair
 372 /* prototype is in system/network.h */
 373 #endif
 374
 375 #ifndef HAVE_VDPRINTF
 376 #define vdprintf rep_vdprintf
 377 int rep_vdprintf(int fd, const char *format, va_list ap);
 378 #endif
 379
 380 #ifndef HAVE_DPRINTF
 381 #define dprintf rep_dprintf
 382 int rep_dprintf(int fd, const char *format, ...);
 383 #endif
 384
 385 #ifndef PRINTF_ATTRIBUTE
 386 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
 387 /** Use gcc attribute to check printf fns.  a1 is the 1-based index of
 388  * the parameter containing the format, and a2 the index of the first
 389  * argument. Note that some gcc 2.x versions don't handle this
 390  * properly **/
 391 #define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
 392 #else
 393 #define PRINTF_ATTRIBUTE(a1, a2)
 394 #endif
 395 #endif
 396
 397 #ifndef _DEPRECATED_
 398 #if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
 399 #define _DEPRECATED_ __attribute__ ((deprecated))
 400 #else
 401 #define _DEPRECATED_
 402 #endif
 403 #endif
 404
 405 #ifndef HAVE_VASPRINTF
 406 #define vasprintf rep_vasprintf
 407 int rep_vasprintf(char **ptr, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
 408 #endif
 409
 410 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
 411 #define snprintf rep_snprintf
 412 int rep_snprintf(char *,size_t ,const char *, ...) PRINTF_ATTRIBUTE(3,4);
 413 #endif
 414
 415 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
 416 #define vsnprintf rep_vsnprintf
 417 int rep_vsnprintf(char *,size_t ,const char *, va_list ap) PRINTF_ATTRIBUTE(3,0);
 418 #endif
 419
 420 #ifndef HAVE_ASPRINTF
 421 #define asprintf rep_asprintf
 422 int rep_asprintf(char **,const char *, ...) PRINTF_ATTRIBUTE(2,3);
 423 #endif
 424
 425 #ifndef HAVE_VSYSLOG
 426 #ifdef HAVE_SYSLOG
 427 #define vsyslog rep_vsyslog
 428 void rep_vsyslog (int facility_priority, const char *format, va_list arglist) PRINTF_ATTRIBUTE(2,0);
 429 #endif
 430 #endif
 431
 432 /* we used to use these fns, but now we have good replacements
 433    for snprintf and vsnprintf */
 434 #define slprintf snprintf
 435
 436
 437 #ifndef HAVE_VA_COPY
 438 #undef va_copy
 439 #ifdef HAVE___VA_COPY
 440 #define va_copy(dest, src) __va_copy(dest, src)
 441 #else
 442 #define va_copy(dest, src) (dest) = (src)
 443 #endif
 444 #endif
 445
 446 #ifndef HAVE_VOLATILE
 447 #define volatile
 448 #endif
 449
 450 #ifndef HAVE_COMPARISON_FN_T
 451 typedef int (*comparison_fn_t)(const void *, const void *);
 452 #endif
 453
 454 #ifndef HAVE_WORKING_STRPTIME
 455 #define strptime rep_strptime
 456 struct tm;
 457 char *rep_strptime(const char *buf, const char *format, struct tm *tm);
 458 #endif
 459
 460 #ifndef HAVE_DUP2
 461 #define dup2 rep_dup2
 462 int rep_dup2(int oldfd, int newfd);
 463 #endif
 464
 465 /* Load header file for dynamic linking stuff */
 466 #ifdef HAVE_DLFCN_H
 467 #include <dlfcn.h>
 468 #endif
 469
 470 #ifndef RTLD_LAZY
 471 #define RTLD_LAZY 0
 472 #endif
 473 #ifndef RTLD_NOW
 474 #define RTLD_NOW 0
 475 #endif
 476 #ifndef RTLD_GLOBAL
 477 #define RTLD_GLOBAL 0
 478 #endif
 479
 480 #ifndef HAVE_SECURE_MKSTEMP
 481 #define mkstemp(path) rep_mkstemp(path)
 482 int rep_mkstemp(char *temp);
 483 #endif
 484
 485 #ifndef HAVE_MKDTEMP
 486 #define mkdtemp rep_mkdtemp
 487 char *rep_mkdtemp(char *template);
 488 #endif
 489
 490 #ifndef HAVE_PREAD
 491 #define pread rep_pread
 492 ssize_t rep_pread(int __fd, void *__buf, size_t __nbytes, off_t __offset);
 493 #define LIBREPLACE_PREAD_REPLACED 1
 494 #else
 495 #define LIBREPLACE_PREAD_NOT_REPLACED 1
 496 #endif
 497
 498 #ifndef HAVE_PWRITE
 499 #define pwrite rep_pwrite
 500 ssize_t rep_pwrite(int __fd, const void *__buf, size_t __nbytes, off_t __offset);
 501 #define LIBREPLACE_PWRITE_REPLACED 1
 502 #else
 503 #define LIBREPLACE_PWRITE_NOT_REPLACED 1
 504 #endif
 505
 506 #if !defined(HAVE_INET_NTOA) || defined(REPLACE_INET_NTOA)
 507 #define inet_ntoa rep_inet_ntoa
 508 /* prototype is in "system/network.h" */
 509 #endif
 510
 511 #ifndef HAVE_INET_PTON
 512 #define inet_pton rep_inet_pton
 513 /* prototype is in "system/network.h" */
 514 #endif
 515
 516 #ifndef HAVE_INET_NTOP
 517 #define inet_ntop rep_inet_ntop
 518 /* prototype is in "system/network.h" */
 519 #endif
 520
 521 #ifndef HAVE_INET_ATON
 522 #define inet_aton rep_inet_aton
 523 /* prototype is in "system/network.h" */
 524 #endif
 525
 526 #ifndef HAVE_CONNECT
 527 #define connect rep_connect
 528 /* prototype is in "system/network.h" */
 529 #endif
 530
 531 #ifndef HAVE_GETHOSTBYNAME
 532 #define gethostbyname rep_gethostbyname
 533 /* prototype is in "system/network.h" */
 534 #endif
 535
 536 #ifndef HAVE_GETIFADDRS
 537 #define getifaddrs rep_getifaddrs
 538 /* prototype is in "system/network.h" */
 539 #endif
 540
 541 #ifndef HAVE_FREEIFADDRS
 542 #define freeifaddrs rep_freeifaddrs
 543 /* prototype is in "system/network.h" */
 544 #endif
 545
 546 #ifndef HAVE_GET_CURRENT_DIR_NAME
 547 #define get_current_dir_name rep_get_current_dir_name
 548 char *rep_get_current_dir_name(void);
 549 #endif
 550
 551 #if !defined(HAVE_STRERROR_R) || !defined(STRERROR_R_PROTO_COMPATIBLE)
 552 #undef strerror_r
 553 #define strerror_r rep_strerror_r
 554 int rep_strerror_r(int errnum, char *buf, size_t buflen);
 555 #endif
 556
 557 #if !defined(HAVE_CLOCK_GETTIME)
 558 #define clock_gettime rep_clock_gettime
 559 #endif
 560
 561 #ifdef HAVE_LIMITS_H
 562 #include <limits.h>
 563 #endif
 564
 565 #ifdef HAVE_SYS_PARAM_H
 566 #include <sys/param.h>
 567 #endif
 568
 569 /* The extra casts work around common compiler bugs.  */
 570 #define _TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 571 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 572    It is necessary at least when t == time_t.  */
 573 #define _TYPE_MINIMUM(t) ((t) (_TYPE_SIGNED (t) \
 574                               ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
 575 #define _TYPE_MAXIMUM(t) ((t) (~ (t) 0 - _TYPE_MINIMUM (t)))
 576
 577 #ifndef UINT16_MAX
 578 #define UINT16_MAX 65535
 579 #endif
 580
 581 #ifndef UINT32_MAX
 582 #define UINT32_MAX (4294967295U)
 583 #endif
 584
 585 #ifndef UINT64_MAX
 586 #define UINT64_MAX ((uint64_t)-1)
 587 #endif
 588
 589 #ifndef INT64_MAX
 590 #define INT64_MAX 9223372036854775807
 591 #endif
 592
 593 #ifndef CHAR_BIT
 594 #define CHAR_BIT 8
 595 #endif
 596
 597 #ifndef INT32_MAX
 598 #define INT32_MAX _TYPE_MAXIMUM(int32_t)
 599 #endif
 600
 601 #ifdef HAVE_STDBOOL_H
 602 #include <stdbool.h>
 603 #endif
 604
 605 #if !defined(HAVE_BOOL)
 606 #ifdef HAVE__Bool
 607 #define bool _Bool
 608 #else
 609 typedef int bool;
 610 #endif
 611 #endif
 612
 613 #if !defined(HAVE_INTPTR_T)
 614 typedef long long intptr_t ;
 615 #endif
 616
 617 #if !defined(HAVE_UINTPTR_T)
 618 typedef unsigned long long uintptr_t ;
 619 #endif
 620
 621 #if !defined(HAVE_PTRDIFF_T)
 622 typedef unsigned long long ptrdiff_t ;
 623 #endif
 624
 625 /*
 626  * to prevent <rpcsvc/yp_prot.h> from doing a redefine of 'bool'
 627  *
 628  * IRIX, HPUX, MacOS 10 and Solaris need BOOL_DEFINED
 629  * Tru64 needs _BOOL_EXISTS
 630  * AIX needs _BOOL,_TRUE,_FALSE
 631  */
 632 #ifndef BOOL_DEFINED
 633 #define BOOL_DEFINED
 634 #endif
 635 #ifndef _BOOL_EXISTS
 636 #define _BOOL_EXISTS
 637 #endif
 638 #ifndef _BOOL
 639 #define _BOOL
 640 #endif
 641
 642 #ifndef __bool_true_false_are_defined
 643 #define __bool_true_false_are_defined
 644 #endif
 645
 646 #ifndef true
 647 #define true (1)
 648 #endif
 649 #ifndef false
 650 #define false (0)
 651 #endif
 652
 653 #ifndef _TRUE
 654 #define _TRUE true
 655 #endif
 656 #ifndef _FALSE
 657 #define _FALSE false
 658 #endif
 659
 660 #ifndef HAVE_FUNCTION_MACRO
 661 #ifdef HAVE_func_MACRO
 662 #define __FUNCTION__ __func__
 663 #else
 664 #define __FUNCTION__ ("")
 665 #endif
 666 #endif
 667
 668
 669 #ifndef MIN
 670 #define MIN(a,b) ((a)<(b)?(a):(b))
 671 #endif
 672
 673 #ifndef MAX
 674 #define MAX(a,b) ((a)>(b)?(a):(b))
 675 #endif
 676
 677 #if !defined(HAVE_VOLATILE)
 678 #define volatile
 679 #endif
 680
 681 /**
 682   this is a warning hack. The idea is to use this everywhere that we
 683   get the "discarding const" warning from gcc. That doesn't actually
 684   fix the problem of course, but it means that when we do get to
 685   cleaning them up we can do it by searching the code for
 686   discard_const.
 687
 688   It also means that other error types aren't as swamped by the noise
 689   of hundreds of const warnings, so we are more likely to notice when
 690   we get new errors.
 691
 692   Please only add more uses of this macro when you find it
 693   _really_ hard to fix const warnings. Our aim is to eventually use
 694   this function in only a very few places.
 695
 696   Also, please call this via the discard_const_p() macro interface, as that
 697   makes the return type safe.
 698 */
 699 #define discard_const(ptr) ((void *)((uintptr_t)(ptr)))
 700
 701 /** Type-safe version of discard_const */
 702 #define discard_const_p(type, ptr) ((type *)discard_const(ptr))
 703
 704 #ifndef __STRING
 705 #define __STRING(x)    #x
 706 #endif
 707
 708 #ifndef __STRINGSTRING
 709 #define __STRINGSTRING(x) __STRING(x)
 710 #endif
 711
 712 #ifndef __LINESTR__
 713 #define __LINESTR__ __STRINGSTRING(__LINE__)
 714 #endif
 715
 716 #ifndef __location__
 717 #define __location__ __FILE__ ":" __LINESTR__
 718 #endif
 719
 720 /**
 721  * zero a structure
 722  */
 723 #define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))
 724
 725 /**
 726  * zero a structure given a pointer to the structure
 727  */
 728 #define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
 729
 730 /**
 731  * zero a structure given a pointer to the structure - no zero check
 732  */
 733 #define ZERO_STRUCTPN(x) memset((char *)(x), 0, sizeof(*(x)))
 734
 735 /* zero an array - note that sizeof(array) must work - ie. it must not be a
 736    pointer */
 737 #define ZERO_ARRAY(x) memset((char *)(x), 0, sizeof(x))
 738
 739 /**
 740  * work out how many elements there are in a static array
 741  */
 742 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
 743
 744 /**
 745  * pointer difference macro
 746  */
 747 #define PTR_DIFF(p1,p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
 748
 749 #if MMAP_BLACKLIST
 750 #undef HAVE_MMAP
 751 #endif
 752
 753 #ifdef __COMPAR_FN_T
 754 #define QSORT_CAST (__compar_fn_t)
 755 #endif
 756
 757 #ifndef QSORT_CAST
 758 #define QSORT_CAST (int (*)(const void *, const void *))
 759 #endif
 760
 761 #ifndef PATH_MAX
 762 #define PATH_MAX 1024
 763 #endif
 764
 765 #ifndef MAX_DNS_NAME_LENGTH
 766 #define MAX_DNS_NAME_LENGTH 256 /* Actually 255 but +1 for terminating null. */
 767 #endif
 768
 769 #ifndef HAVE_CRYPT
 770 char *ufc_crypt(const char *key, const char *salt);
 771 #define crypt ufc_crypt
 772 #else
 773 #ifdef HAVE_CRYPT_H
 774 #include <crypt.h>
 775 #endif
 776 #endif
 777
 778 /* these macros gain us a few percent of speed on gcc */
 779 #if (__GNUC__ >= 3)
 780 /* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
 781    as its first argument */
 782 #ifndef likely
 783 #define likely(x)   __builtin_expect(!!(x), 1)
 784 #endif
 785 #ifndef unlikely
 786 #define unlikely(x) __builtin_expect(!!(x), 0)
 787 #endif
 788 #else
 789 #ifndef likely
 790 #define likely(x) (x)
 791 #endif
 792 #ifndef unlikely
 793 #define unlikely(x) (x)
 794 #endif
 795 #endif
 796
 797 #ifndef HAVE_FDATASYNC
 798 #define fdatasync(fd) fsync(fd)
 799 #elif !defined(HAVE_DECL_FDATASYNC)
 800 int fdatasync(int );
 801 #endif
 802
 803 /* these are used to mark symbols as local to a shared lib, or
 804  * publicly available via the shared lib API */
 805 #ifndef _PUBLIC_
 806 #ifdef HAVE_VISIBILITY_ATTR
 807 #define _PUBLIC_ __attribute__((visibility("default")))
 808 #else
 809 #define _PUBLIC_
 810 #endif
 811 #endif
 812
 813 #ifndef _PRIVATE_
 814 #ifdef HAVE_VISIBILITY_ATTR
 815 #  define _PRIVATE_ __attribute__((visibility("hidden")))
 816 #else
 817 #  define _PRIVATE_
 818 #endif
 819 #endif
 820
 821 #ifndef HAVE_POLL
 822 #define poll rep_poll
 823 /* prototype is in "system/network.h" */
 824 #endif
 825
 826 #if !defined(getpass)
 827 #ifdef REPLACE_GETPASS
 828 #if defined(REPLACE_GETPASS_BY_GETPASSPHRASE)
 829 #define getpass(prompt) getpassphrase(prompt)
 830 #else
 831 #define getpass(prompt) rep_getpass(prompt)
 832 char *rep_getpass(const char *prompt);
 833 #endif
 834 #endif
 835 #endif
 836
 837 #ifndef HAVE_GETPEEREID
 838 #define getpeereid rep_getpeereid
 839 int rep_getpeereid(int s, uid_t *uid, gid_t *gid);
 840 #endif
 841
 842 #ifndef HAVE_USLEEP
 843 #define usleep rep_usleep
 844 typedef long useconds_t;
 845 int usleep(useconds_t);
 846 #endif
 847
 848 #endif /* _LIBREPLACE_REPLACE_H */