git-compat-util.h

   1 #ifndef GIT_COMPAT_UTIL_H
   2 #define GIT_COMPAT_UTIL_H
   3
   4 #define _FILE_OFFSET_BITS 64
   5
   6 #ifndef FLEX_ARRAY
   7 /*
   8  * See if our compiler is known to support flexible array members.
   9  */
  10 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
  11 # define FLEX_ARRAY /* empty */
  12 #elif defined(__GNUC__)
  13 # if (__GNUC__ >= 3)
  14 #  define FLEX_ARRAY /* empty */
  15 # else
  16 #  define FLEX_ARRAY 0 /* older GNU extension */
  17 # endif
  18 #endif
  19
  20 /*
  21  * Otherwise, default to safer but a bit wasteful traditional style
  22  */
  23 #ifndef FLEX_ARRAY
  24 # define FLEX_ARRAY 1
  25 #endif
  26 #endif
  27
  28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  29 #define bitsizeof(x)  (CHAR_BIT * sizeof(x))
  30
  31 #define maximum_signed_value_of_type(a) \
  32     (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
  33
  34 #define maximum_unsigned_value_of_type(a) \
  35     (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
  36
  37 /*
  38  * Signed integer overflow is undefined in C, so here's a helper macro
  39  * to detect if the sum of two integers will overflow.
  40  *
  41  * Requires: a >= 0, typeof(a) equals typeof(b)
  42  */
  43 #define signed_add_overflows(a, b) \
  44     ((b) > maximum_signed_value_of_type(a) - (a))
  45
  46 #define unsigned_add_overflows(a, b) \
  47     ((b) > maximum_unsigned_value_of_type(a) - (a))
  48
  49 #ifdef __GNUC__
  50 #define TYPEOF(x) (__typeof__(x))
  51 #else
  52 #define TYPEOF(x)
  53 #endif
  54
  55 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
  56 #define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */
  57
  58 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
  59
  60 /* Approximation of the length of the decimal representation of this type. */
  61 #define decimal_length(x)       ((int)(sizeof(x) * 2.56 + 0.5) + 1)
  62
  63 #if defined(__sun__)
  64  /*
  65   * On Solaris, when _XOPEN_EXTENDED is set, its header file
  66   * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
  67   * setting to say we are XPG5 or XPG6.  Also on Solaris,
  68   * XPG6 programs must be compiled with a c99 compiler, while
  69   * non XPG6 programs must be compiled with a pre-c99 compiler.
  70   */
  71 # if __STDC_VERSION__ - 0 >= 199901L
  72 # define _XOPEN_SOURCE 600
  73 # else
  74 # define _XOPEN_SOURCE 500
  75 # endif
  76 #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
  77       !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
  78       !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__)
  79 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
  80 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
  81 #endif
  82 #define _ALL_SOURCE 1
  83 #define _GNU_SOURCE 1
  84 #define _BSD_SOURCE 1
  85 #define _NETBSD_SOURCE 1
  86 #define _SGI_SOURCE 1
  87
  88 #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
  89 # if defined (_MSC_VER) && !defined(_WIN32_WINNT)
  90 #  define _WIN32_WINNT 0x0502
  91 # endif
  92 #define WIN32_LEAN_AND_MEAN  /* stops windows.h including winsock.h */
  93 #include <winsock2.h>
  94 #include <windows.h>
  95 #define GIT_WINDOWS_NATIVE
  96 #endif
  97
  98 #include <unistd.h>
  99 #include <stdio.h>
 100 #include <sys/stat.h>
 101 #include <fcntl.h>
 102 #include <stddef.h>
 103 #include <stdlib.h>
 104 #include <stdarg.h>
 105 #include <string.h>
 106 #ifdef HAVE_STRINGS_H
 107 #include <strings.h> /* for strcasecmp() */
 108 #endif
 109 #include <errno.h>
 110 #include <limits.h>
 111 #ifdef NEEDS_SYS_PARAM_H
 112 #include <sys/param.h>
 113 #endif
 114 #include <sys/types.h>
 115 #include <dirent.h>
 116 #include <sys/time.h>
 117 #include <time.h>
 118 #include <signal.h>
 119 #include <assert.h>
 120 #include <regex.h>
 121 #include <utime.h>
 122 #include <syslog.h>
 123 #ifndef NO_SYS_POLL_H
 124 #include <sys/poll.h>
 125 #else
 126 #include <poll.h>
 127 #endif
 128
 129 #if defined(__MINGW32__)
 130 /* pull in Windows compatibility stuff */
 131 #include "compat/mingw.h"
 132 #elif defined(_MSC_VER)
 133 #include "compat/msvc.h"
 134 #else
 135 #include <sys/wait.h>
 136 #include <sys/resource.h>
 137 #include <sys/socket.h>
 138 #include <sys/ioctl.h>
 139 #include <termios.h>
 140 #ifndef NO_SYS_SELECT_H
 141 #include <sys/select.h>
 142 #endif
 143 #include <netinet/in.h>
 144 #include <netinet/tcp.h>
 145 #include <arpa/inet.h>
 146 #include <netdb.h>
 147 #include <pwd.h>
 148 #include <sys/un.h>
 149 #ifndef NO_INTTYPES_H
 150 #include <inttypes.h>
 151 #else
 152 #include <stdint.h>
 153 #endif
 154 #ifdef NO_INTPTR_T
 155 /*
 156  * On I16LP32, ILP32 and LP64 "long" is the save bet, however
 157  * on LLP86, IL33LLP64 and P64 it needs to be "long long",
 158  * while on IP16 and IP16L32 it is "int" (resp. "short")
 159  * Size needs to match (or exceed) 'sizeof(void *)'.
 160  * We can't take "long long" here as not everybody has it.
 161  */
 162 typedef long intptr_t;
 163 typedef unsigned long uintptr_t;
 164 #endif
 165 #if defined(__CYGWIN__)
 166 #undef _XOPEN_SOURCE
 167 #include <grp.h>
 168 #define _XOPEN_SOURCE 600
 169 #else
 170 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
 171 #include <grp.h>
 172 #define _ALL_SOURCE 1
 173 #endif
 174 #endif
 175
 176 /* used on Mac OS X */
 177 #ifdef PRECOMPOSE_UNICODE
 178 #include "compat/precompose_utf8.h"
 179 #else
 180 #define precompose_str(in,i_nfd2nfc)
 181 #define precompose_argv(c,v)
 182 #define probe_utf8_pathname_composition(a,b)
 183 #endif
 184
 185 #ifdef MKDIR_WO_TRAILING_SLASH
 186 #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
 187 extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
 188 #endif
 189
 190 #ifdef NO_STRUCT_ITIMERVAL
 191 struct itimerval {
 192         struct timeval it_interval;
 193         struct timeval it_value;
 194 }
 195 #endif
 196
 197 #ifdef NO_SETITIMER
 198 #define setitimer(which,value,ovalue)
 199 #endif
 200
 201 #ifndef NO_LIBGEN_H
 202 #include <libgen.h>
 203 #else
 204 #define basename gitbasename
 205 extern char *gitbasename(char *);
 206 #endif
 207
 208 #ifndef NO_ICONV
 209 #include <iconv.h>
 210 #endif
 211
 212 #ifndef NO_OPENSSL
 213 #include <openssl/ssl.h>
 214 #include <openssl/err.h>
 215 #endif
 216
 217 /* On most systems <netdb.h> would have given us this, but
 218  * not on some systems (e.g. z/OS).
 219  */
 220 #ifndef NI_MAXHOST
 221 #define NI_MAXHOST 1025
 222 #endif
 223
 224 #ifndef NI_MAXSERV
 225 #define NI_MAXSERV 32
 226 #endif
 227
 228 /* On most systems <limits.h> would have given us this, but
 229  * not on some systems (e.g. GNU/Hurd).
 230  */
 231 #ifndef PATH_MAX
 232 #define PATH_MAX 4096
 233 #endif
 234
 235 #ifndef PRIuMAX
 236 #define PRIuMAX "llu"
 237 #endif
 238
 239 #ifndef PRIu32
 240 #define PRIu32 "u"
 241 #endif
 242
 243 #ifndef PRIx32
 244 #define PRIx32 "x"
 245 #endif
 246
 247 #ifndef PRIo32
 248 #define PRIo32 "o"
 249 #endif
 250
 251 #ifndef PATH_SEP
 252 #define PATH_SEP ':'
 253 #endif
 254
 255 #ifdef HAVE_PATHS_H
 256 #include <paths.h>
 257 #endif
 258 #ifndef _PATH_DEFPATH
 259 #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
 260 #endif
 261
 262 #ifndef STRIP_EXTENSION
 263 #define STRIP_EXTENSION ""
 264 #endif
 265
 266 #ifndef has_dos_drive_prefix
 267 #define has_dos_drive_prefix(path) 0
 268 #endif
 269
 270 #ifndef is_dir_sep
 271 #define is_dir_sep(c) ((c) == '/')
 272 #endif
 273
 274 #ifndef find_last_dir_sep
 275 #define find_last_dir_sep(path) strrchr(path, '/')
 276 #endif
 277
 278 #if defined(__HP_cc) && (__HP_cc >= 61000)
 279 #define NORETURN __attribute__((noreturn))
 280 #define NORETURN_PTR
 281 #elif defined(__GNUC__) && !defined(NO_NORETURN)
 282 #define NORETURN __attribute__((__noreturn__))
 283 #define NORETURN_PTR __attribute__((__noreturn__))
 284 #elif defined(_MSC_VER)
 285 #define NORETURN __declspec(noreturn)
 286 #define NORETURN_PTR
 287 #else
 288 #define NORETURN
 289 #define NORETURN_PTR
 290 #ifndef __attribute__
 291 #define __attribute__(x)
 292 #endif
 293 #endif
 294
 295 /* The sentinel attribute is valid from gcc version 4.0 */
 296 #if defined(__GNUC__) && (__GNUC__ >= 4)
 297 #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 298 #else
 299 #define LAST_ARG_MUST_BE_NULL
 300 #endif
 301
 302 #include "compat/bswap.h"
 303
 304 #include "wildmatch.h"
 305
 306 /* General helper functions */
 307 extern void vreportf(const char *prefix, const char *err, va_list params);
 308 extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 309 extern NORETURN void usage(const char *err);
 310 extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 311 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 312 extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 313 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 314 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 315
 316 #ifndef NO_OPENSSL
 317 #ifdef APPLE_COMMON_CRYPTO
 318 #include "compat/apple-common-crypto.h"
 319 #else
 320 #include <openssl/evp.h>
 321 #include <openssl/hmac.h>
 322 #endif /* APPLE_COMMON_CRYPTO */
 323 #include <openssl/x509v3.h>
 324 #endif /* NO_OPENSSL */
 325
 326 /*
 327  * Let callers be aware of the constant return value; this can help
 328  * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 329  * because some compilers may not support variadic macros. Since we're only
 330  * trying to help gcc, anyway, it's OK; other compilers will fall back to
 331  * using the function as usual.
 332  */
 333 #if defined(__GNUC__) && ! defined(__clang__)
 334 #define error(...) (error(__VA_ARGS__), -1)
 335 #endif
 336
 337 extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 338 extern void set_error_routine(void (*routine)(const char *err, va_list params));
 339 extern void set_die_is_recursing_routine(int (*routine)(void));
 340
 341 extern int starts_with(const char *str, const char *prefix);
 342
 343 static inline const char *skip_prefix(const char *str, const char *prefix)
 344 {
 345         do {
 346                 if (!*prefix)
 347                         return str;
 348         } while (*str++ == *prefix++);
 349         return NULL;
 350 }
 351
 352 /*
 353  * If buf ends with suffix, return 1 and subtract the length of the suffix
 354  * from *len. Otherwise, return 0 and leave *len untouched.
 355  */
 356 static inline int strip_suffix_mem(const char *buf, size_t *len,
 357                                    const char *suffix)
 358 {
 359         size_t suflen = strlen(suffix);
 360         if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 361                 return 0;
 362         *len -= suflen;
 363         return 1;
 364 }
 365
 366 /*
 367  * If str ends with suffix, return 1 and set *len to the size of the string
 368  * without the suffix. Otherwise, return 0 and set *len to the size of the
 369  * string.
 370  *
 371  * Note that we do _not_ NUL-terminate str to the new length.
 372  */
 373 static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 374 {
 375         *len = strlen(str);
 376         return strip_suffix_mem(str, len, suffix);
 377 }
 378
 379 static inline int ends_with(const char *str, const char *suffix)
 380 {
 381         size_t len;
 382         return strip_suffix(str, suffix, &len);
 383 }
 384
 385 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 386
 387 #ifndef PROT_READ
 388 #define PROT_READ 1
 389 #define PROT_WRITE 2
 390 #define MAP_PRIVATE 1
 391 #endif
 392
 393 #define mmap git_mmap
 394 #define munmap git_munmap
 395 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 396 extern int git_munmap(void *start, size_t length);
 397
 398 #else /* NO_MMAP || USE_WIN32_MMAP */
 399
 400 #include <sys/mman.h>
 401
 402 #endif /* NO_MMAP || USE_WIN32_MMAP */
 403
 404 #ifdef NO_MMAP
 405
 406 /* This value must be multiple of (pagesize * 2) */
 407 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 408
 409 #else /* NO_MMAP */
 410
 411 /* This value must be multiple of (pagesize * 2) */
 412 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 413         (sizeof(void*) >= 8 \
 414                 ?  1 * 1024 * 1024 * 1024 \
 415                 : 32 * 1024 * 1024)
 416
 417 #endif /* NO_MMAP */
 418
 419 #ifndef MAP_FAILED
 420 #define MAP_FAILED ((void *)-1)
 421 #endif
 422
 423 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 424 #define on_disk_bytes(st) ((st).st_size)
 425 #else
 426 #define on_disk_bytes(st) ((st).st_blocks * 512)
 427 #endif
 428
 429 #define DEFAULT_PACKED_GIT_LIMIT \
 430         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 431
 432 #ifdef NO_PREAD
 433 #define pread git_pread
 434 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 435 #endif
 436 /*
 437  * Forward decl that will remind us if its twin in cache.h changes.
 438  * This function is used in compat/pread.c.  But we can't include
 439  * cache.h there.
 440  */
 441 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 442
 443 #ifdef NO_SETENV
 444 #define setenv gitsetenv
 445 extern int gitsetenv(const char *, const char *, int);
 446 #endif
 447
 448 #ifdef NO_MKDTEMP
 449 #define mkdtemp gitmkdtemp
 450 extern char *gitmkdtemp(char *);
 451 #endif
 452
 453 #ifdef NO_MKSTEMPS
 454 #define mkstemps gitmkstemps
 455 extern int gitmkstemps(char *, int);
 456 #endif
 457
 458 #ifdef NO_UNSETENV
 459 #define unsetenv gitunsetenv
 460 extern void gitunsetenv(const char *);
 461 #endif
 462
 463 #ifdef NO_STRCASESTR
 464 #define strcasestr gitstrcasestr
 465 extern char *gitstrcasestr(const char *haystack, const char *needle);
 466 #endif
 467
 468 #ifdef NO_STRLCPY
 469 #define strlcpy gitstrlcpy
 470 extern size_t gitstrlcpy(char *, const char *, size_t);
 471 #endif
 472
 473 #ifdef NO_STRTOUMAX
 474 #define strtoumax gitstrtoumax
 475 extern uintmax_t gitstrtoumax(const char *, char **, int);
 476 #define strtoimax gitstrtoimax
 477 extern intmax_t gitstrtoimax(const char *, char **, int);
 478 #endif
 479
 480 #ifdef NO_HSTRERROR
 481 #define hstrerror githstrerror
 482 extern const char *githstrerror(int herror);
 483 #endif
 484
 485 #ifdef NO_MEMMEM
 486 #define memmem gitmemmem
 487 void *gitmemmem(const void *haystack, size_t haystacklen,
 488                 const void *needle, size_t needlelen);
 489 #endif
 490
 491 #ifdef NO_GETPAGESIZE
 492 #define getpagesize() sysconf(_SC_PAGESIZE)
 493 #endif
 494
 495 #ifdef FREAD_READS_DIRECTORIES
 496 #ifdef fopen
 497 #undef fopen
 498 #endif
 499 #define fopen(a,b) git_fopen(a,b)
 500 extern FILE *git_fopen(const char*, const char*);
 501 #endif
 502
 503 #ifdef SNPRINTF_RETURNS_BOGUS
 504 #ifdef snprintf
 505 #undef snprintf
 506 #endif
 507 #define snprintf git_snprintf
 508 extern int git_snprintf(char *str, size_t maxsize,
 509                         const char *format, ...);
 510 #ifdef vsnprintf
 511 #undef vsnprintf
 512 #endif
 513 #define vsnprintf git_vsnprintf
 514 extern int git_vsnprintf(char *str, size_t maxsize,
 515                          const char *format, va_list ap);
 516 #endif
 517
 518 #ifdef __GLIBC_PREREQ
 519 #if __GLIBC_PREREQ(2, 1)
 520 #define HAVE_STRCHRNUL
 521 #define HAVE_MEMPCPY
 522 #endif
 523 #endif
 524
 525 #ifndef HAVE_STRCHRNUL
 526 #define strchrnul gitstrchrnul
 527 static inline char *gitstrchrnul(const char *s, int c)
 528 {
 529         while (*s && *s != c)
 530                 s++;
 531         return (char *)s;
 532 }
 533 #endif
 534
 535 #ifndef HAVE_MEMPCPY
 536 #define mempcpy gitmempcpy
 537 static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 538 {
 539         return (char *)memcpy(dest, src, n) + n;
 540 }
 541 #endif
 542
 543 #ifdef NO_INET_PTON
 544 int inet_pton(int af, const char *src, void *dst);
 545 #endif
 546
 547 #ifdef NO_INET_NTOP
 548 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 549 #endif
 550
 551 extern void release_pack_memory(size_t);
 552
 553 typedef void (*try_to_free_t)(size_t);
 554 extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 555
 556 extern char *xstrdup(const char *str);
 557 extern void *xmalloc(size_t size);
 558 extern void *xmallocz(size_t size);
 559 extern void *xmemdupz(const void *data, size_t len);
 560 extern char *xstrndup(const char *str, size_t len);
 561 extern void *xrealloc(void *ptr, size_t size);
 562 extern void *xcalloc(size_t nmemb, size_t size);
 563 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 564 extern ssize_t xread(int fd, void *buf, size_t len);
 565 extern ssize_t xwrite(int fd, const void *buf, size_t len);
 566 extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 567 extern int xdup(int fd);
 568 extern FILE *xfdopen(int fd, const char *mode);
 569 extern int xmkstemp(char *template);
 570 extern int xmkstemp_mode(char *template, int mode);
 571 extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 572 extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 573
 574 static inline size_t xsize_t(off_t len)
 575 {
 576         if (len > (size_t) len)
 577                 die("Cannot handle files this big");
 578         return (size_t)len;
 579 }
 580
 581 static inline int has_extension(const char *filename, const char *ext)
 582 {
 583         size_t len = strlen(filename);
 584         size_t extlen = strlen(ext);
 585         return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 586 }
 587
 588 /* in ctype.c, for kwset users */
 589 extern const char tolower_trans_tbl[256];
 590
 591 /* Sane ctype - no locale, and works with signed chars */
 592 #undef isascii
 593 #undef isspace
 594 #undef isdigit
 595 #undef isalpha
 596 #undef isalnum
 597 #undef isprint
 598 #undef islower
 599 #undef isupper
 600 #undef tolower
 601 #undef toupper
 602 #undef iscntrl
 603 #undef ispunct
 604 #undef isxdigit
 605
 606 extern const unsigned char sane_ctype[256];
 607 #define GIT_SPACE 0x01
 608 #define GIT_DIGIT 0x02
 609 #define GIT_ALPHA 0x04
 610 #define GIT_GLOB_SPECIAL 0x08
 611 #define GIT_REGEX_SPECIAL 0x10
 612 #define GIT_PATHSPEC_MAGIC 0x20
 613 #define GIT_CNTRL 0x40
 614 #define GIT_PUNCT 0x80
 615 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 616 #define isascii(x) (((x) & ~0x7f) == 0)
 617 #define isspace(x) sane_istest(x,GIT_SPACE)
 618 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 619 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 620 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 621 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 622 #define islower(x) sane_iscase(x, 1)
 623 #define isupper(x) sane_iscase(x, 0)
 624 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 625 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 626 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 627 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 628                 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 629 #define isxdigit(x) (hexval_table[x] != -1)
 630 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 631 #define toupper(x) sane_case((unsigned char)(x), 0)
 632 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 633
 634 static inline int sane_case(int x, int high)
 635 {
 636         if (sane_istest(x, GIT_ALPHA))
 637                 x = (x & ~0x20) | high;
 638         return x;
 639 }
 640
 641 static inline int sane_iscase(int x, int is_lower)
 642 {
 643         if (!sane_istest(x, GIT_ALPHA))
 644                 return 0;
 645
 646         if (is_lower)
 647                 return (x & 0x20) != 0;
 648         else
 649                 return (x & 0x20) == 0;
 650 }
 651
 652 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 653 {
 654         unsigned long ul;
 655         char *p;
 656
 657         errno = 0;
 658         ul = strtoul(s, &p, base);
 659         if (errno || *p || p == s || (unsigned int) ul != ul)
 660                 return -1;
 661         *result = ul;
 662         return 0;
 663 }
 664
 665 static inline int strtol_i(char const *s, int base, int *result)
 666 {
 667         long ul;
 668         char *p;
 669
 670         errno = 0;
 671         ul = strtol(s, &p, base);
 672         if (errno || *p || p == s || (int) ul != ul)
 673                 return -1;
 674         *result = ul;
 675         return 0;
 676 }
 677
 678 #ifdef INTERNAL_QSORT
 679 void git_qsort(void *base, size_t nmemb, size_t size,
 680                int(*compar)(const void *, const void *));
 681 #define qsort git_qsort
 682 #endif
 683
 684 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 685 # define FORCE_DIR_SET_GID S_ISGID
 686 #else
 687 # define FORCE_DIR_SET_GID 0
 688 #endif
 689
 690 #ifdef NO_NSEC
 691 #undef USE_NSEC
 692 #define ST_CTIME_NSEC(st) 0
 693 #define ST_MTIME_NSEC(st) 0
 694 #else
 695 #ifdef USE_ST_TIMESPEC
 696 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 697 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 698 #else
 699 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 700 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 701 #endif
 702 #endif
 703
 704 #ifdef UNRELIABLE_FSTAT
 705 #define fstat_is_reliable() 0
 706 #else
 707 #define fstat_is_reliable() 1
 708 #endif
 709
 710 #ifndef va_copy
 711 /*
 712  * Since an obvious implementation of va_list would be to make it a
 713  * pointer into the stack frame, a simple assignment will work on
 714  * many systems.  But let's try to be more portable.
 715  */
 716 #ifdef __va_copy
 717 #define va_copy(dst, src) __va_copy(dst, src)
 718 #else
 719 #define va_copy(dst, src) ((dst) = (src))
 720 #endif
 721 #endif
 722
 723 /*
 724  * Preserves errno, prints a message, but gives no warning for ENOENT.
 725  * Always returns the return value of unlink(2).
 726  */
 727 int unlink_or_warn(const char *path);
 728 /*
 729  * Likewise for rmdir(2).
 730  */
 731 int rmdir_or_warn(const char *path);
 732 /*
 733  * Calls the correct function out of {unlink,rmdir}_or_warn based on
 734  * the supplied file mode.
 735  */
 736 int remove_or_warn(unsigned int mode, const char *path);
 737
 738 /*
 739  * Call access(2), but warn for any error except "missing file"
 740  * (ENOENT or ENOTDIR).
 741  */
 742 #define ACCESS_EACCES_OK (1U << 0)
 743 int access_or_warn(const char *path, int mode, unsigned flag);
 744 int access_or_die(const char *path, int mode, unsigned flag);
 745
 746 /* Warn on an inaccessible file that ought to be accessible */
 747 void warn_on_inaccessible(const char *path);
 748
 749 /* Get the passwd entry for the UID of the current process. */
 750 struct passwd *xgetpwuid_self(void);
 751
 752 #ifdef GMTIME_UNRELIABLE_ERRORS
 753 struct tm *git_gmtime(const time_t *);
 754 struct tm *git_gmtime_r(const time_t *, struct tm *);
 755 #define gmtime git_gmtime
 756 #define gmtime_r git_gmtime_r
 757 #endif
 758
 759 #endif