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 #include "compat/win32/fscache.h"
 133 #elif defined(_MSC_VER)
 134 #include "compat/msvc.h"
 135 #include "compat/win32/fscache.h"
 136 #else
 137 #include <sys/wait.h>
 138 #include <sys/resource.h>
 139 #include <sys/socket.h>
 140 #include <sys/ioctl.h>
 141 #include <termios.h>
 142 #ifndef NO_SYS_SELECT_H
 143 #include <sys/select.h>
 144 #endif
 145 #include <netinet/in.h>
 146 #include <netinet/tcp.h>
 147 #include <arpa/inet.h>
 148 #include <netdb.h>
 149 #include <pwd.h>
 150 #include <sys/un.h>
 151 #ifndef NO_INTTYPES_H
 152 #include <inttypes.h>
 153 #else
 154 #include <stdint.h>
 155 #endif
 156 #ifdef NO_INTPTR_T
 157 /*
 158  * On I16LP32, ILP32 and LP64 "long" is the save bet, however
 159  * on LLP86, IL33LLP64 and P64 it needs to be "long long",
 160  * while on IP16 and IP16L32 it is "int" (resp. "short")
 161  * Size needs to match (or exceed) 'sizeof(void *)'.
 162  * We can't take "long long" here as not everybody has it.
 163  */
 164 typedef long intptr_t;
 165 typedef unsigned long uintptr_t;
 166 #endif
 167 #if defined(__CYGWIN__)
 168 #undef _XOPEN_SOURCE
 169 #include <grp.h>
 170 #define _XOPEN_SOURCE 600
 171 #else
 172 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
 173 #include <grp.h>
 174 #define _ALL_SOURCE 1
 175 #endif
 176 #endif
 177
 178 /* used on Mac OS X */
 179 #ifdef PRECOMPOSE_UNICODE
 180 #include "compat/precompose_utf8.h"
 181 #else
 182 #define precompose_str(in,i_nfd2nfc)
 183 #define precompose_argv(c,v)
 184 #define probe_utf8_pathname_composition(a,b)
 185 #endif
 186
 187 #ifdef MKDIR_WO_TRAILING_SLASH
 188 #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
 189 extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
 190 #endif
 191
 192 #ifdef NO_STRUCT_ITIMERVAL
 193 struct itimerval {
 194         struct timeval it_interval;
 195         struct timeval it_value;
 196 }
 197 #endif
 198
 199 #ifdef NO_SETITIMER
 200 #define setitimer(which,value,ovalue)
 201 #endif
 202
 203 #ifndef NO_LIBGEN_H
 204 #include <libgen.h>
 205 #else
 206 #define basename gitbasename
 207 extern char *gitbasename(char *);
 208 #endif
 209
 210 #ifndef NO_ICONV
 211 #include <iconv.h>
 212 #endif
 213
 214 #ifndef NO_OPENSSL
 215 #include <openssl/ssl.h>
 216 #include <openssl/err.h>
 217 #endif
 218
 219 /* On most systems <netdb.h> would have given us this, but
 220  * not on some systems (e.g. z/OS).
 221  */
 222 #ifndef NI_MAXHOST
 223 #define NI_MAXHOST 1025
 224 #endif
 225
 226 #ifndef NI_MAXSERV
 227 #define NI_MAXSERV 32
 228 #endif
 229
 230 /* On most systems <limits.h> would have given us this, but
 231  * not on some systems (e.g. GNU/Hurd).
 232  */
 233 #ifndef PATH_MAX
 234 #define PATH_MAX 4096
 235 #endif
 236
 237 #ifndef PRIuMAX
 238 #define PRIuMAX "llu"
 239 #endif
 240
 241 #ifndef PRIu32
 242 #define PRIu32 "u"
 243 #endif
 244
 245 #ifndef PRIx32
 246 #define PRIx32 "x"
 247 #endif
 248
 249 #ifndef PRIo32
 250 #define PRIo32 "o"
 251 #endif
 252
 253 #ifndef PATH_SEP
 254 #define PATH_SEP ':'
 255 #endif
 256
 257 #ifdef HAVE_PATHS_H
 258 #include <paths.h>
 259 #endif
 260 #ifndef _PATH_DEFPATH
 261 #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
 262 #endif
 263
 264 #ifndef STRIP_EXTENSION
 265 #define STRIP_EXTENSION ""
 266 #endif
 267
 268 #ifndef has_dos_drive_prefix
 269 #define has_dos_drive_prefix(path) 0
 270 #endif
 271
 272 #ifndef offset_1st_component
 273 #define offset_1st_component(path) (is_dir_sep((path)[0]))
 274 #endif
 275
 276 #ifndef is_dir_sep
 277 #define is_dir_sep(c) ((c) == '/')
 278 #endif
 279
 280 #ifndef find_last_dir_sep
 281 #define find_last_dir_sep(path) strrchr(path, '/')
 282 #endif
 283
 284 #if defined(__HP_cc) && (__HP_cc >= 61000)
 285 #define NORETURN __attribute__((noreturn))
 286 #define NORETURN_PTR
 287 #elif defined(__GNUC__) && !defined(NO_NORETURN)
 288 #define NORETURN __attribute__((__noreturn__))
 289 #define NORETURN_PTR __attribute__((__noreturn__))
 290 #elif defined(_MSC_VER)
 291 #define NORETURN __declspec(noreturn)
 292 #define NORETURN_PTR
 293 #else
 294 #define NORETURN
 295 #define NORETURN_PTR
 296 #ifndef __GNUC__
 297 #ifndef __attribute__
 298 #define __attribute__(x)
 299 #endif
 300 #endif
 301 #endif
 302
 303 /* The sentinel attribute is valid from gcc version 4.0 */
 304 #if defined(__GNUC__) && (__GNUC__ >= 4)
 305 #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 306 #else
 307 #define LAST_ARG_MUST_BE_NULL
 308 #endif
 309
 310 #include "compat/bswap.h"
 311
 312 #include "wildmatch.h"
 313
 314 /* General helper functions */
 315 extern void vreportf(const char *prefix, const char *err, va_list params);
 316 extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 317 extern NORETURN void usage(const char *err);
 318 extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 319 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 320 extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 321 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 322 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 323
 324 #ifndef NO_OPENSSL
 325 #ifdef APPLE_COMMON_CRYPTO
 326 #include "compat/apple-common-crypto.h"
 327 #else
 328 #include <openssl/evp.h>
 329 #include <openssl/hmac.h>
 330 #endif /* APPLE_COMMON_CRYPTO */
 331 #include <openssl/x509v3.h>
 332 #endif /* NO_OPENSSL */
 333
 334 /*
 335  * Let callers be aware of the constant return value; this can help
 336  * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 337  * because some compilers may not support variadic macros. Since we're only
 338  * trying to help gcc, anyway, it's OK; other compilers will fall back to
 339  * using the function as usual.
 340  */
 341 #if defined(__GNUC__)
 342 static inline int const_error(void)
 343 {
 344         return -1;
 345 }
 346 #define error(...) (error(__VA_ARGS__), const_error())
 347 #endif
 348
 349 extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 350 extern void set_error_routine(void (*routine)(const char *err, va_list params));
 351 extern void set_die_is_recursing_routine(int (*routine)(void));
 352
 353 extern int starts_with(const char *str, const char *prefix);
 354
 355 /*
 356  * If the string "str" begins with the string found in "prefix", return 1.
 357  * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 358  * the string right after the prefix).
 359  *
 360  * Otherwise, return 0 and leave "out" untouched.
 361  *
 362  * Examples:
 363  *
 364  *   [extract branch name, fail if not a branch]
 365  *   if (!skip_prefix(ref, "refs/heads/", &branch)
 366  *      return -1;
 367  *
 368  *   [skip prefix if present, otherwise use whole string]
 369  *   skip_prefix(name, "refs/heads/", &name);
 370  */
 371 static inline int skip_prefix(const char *str, const char *prefix,
 372                               const char **out)
 373 {
 374         do {
 375                 if (!*prefix) {
 376                         *out = str;
 377                         return 1;
 378                 }
 379         } while (*str++ == *prefix++);
 380         return 0;
 381 }
 382
 383 /*
 384  * If buf ends with suffix, return 1 and subtract the length of the suffix
 385  * from *len. Otherwise, return 0 and leave *len untouched.
 386  */
 387 static inline int strip_suffix_mem(const char *buf, size_t *len,
 388                                    const char *suffix)
 389 {
 390         size_t suflen = strlen(suffix);
 391         if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 392                 return 0;
 393         *len -= suflen;
 394         return 1;
 395 }
 396
 397 /*
 398  * If str ends with suffix, return 1 and set *len to the size of the string
 399  * without the suffix. Otherwise, return 0 and set *len to the size of the
 400  * string.
 401  *
 402  * Note that we do _not_ NUL-terminate str to the new length.
 403  */
 404 static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 405 {
 406         *len = strlen(str);
 407         return strip_suffix_mem(str, len, suffix);
 408 }
 409
 410 static inline int ends_with(const char *str, const char *suffix)
 411 {
 412         size_t len;
 413         return strip_suffix(str, suffix, &len);
 414 }
 415
 416 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 417
 418 #ifndef PROT_READ
 419 #define PROT_READ 1
 420 #define PROT_WRITE 2
 421 #define MAP_PRIVATE 1
 422 #endif
 423
 424 #define mmap git_mmap
 425 #define munmap git_munmap
 426 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 427 extern int git_munmap(void *start, size_t length);
 428
 429 #else /* NO_MMAP || USE_WIN32_MMAP */
 430
 431 #include <sys/mman.h>
 432
 433 #endif /* NO_MMAP || USE_WIN32_MMAP */
 434
 435 #ifdef NO_MMAP
 436
 437 /* This value must be multiple of (pagesize * 2) */
 438 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 439
 440 #else /* NO_MMAP */
 441
 442 /* This value must be multiple of (pagesize * 2) */
 443 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 444         (sizeof(void*) >= 8 \
 445                 ?  1 * 1024 * 1024 * 1024 \
 446                 : 32 * 1024 * 1024)
 447
 448 #endif /* NO_MMAP */
 449
 450 #ifndef MAP_FAILED
 451 #define MAP_FAILED ((void *)-1)
 452 #endif
 453
 454 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 455 #define on_disk_bytes(st) ((st).st_size)
 456 #else
 457 #define on_disk_bytes(st) ((st).st_blocks * 512)
 458 #endif
 459
 460 #define DEFAULT_PACKED_GIT_LIMIT \
 461         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 462
 463 #ifdef NO_PREAD
 464 #define pread git_pread
 465 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 466 #endif
 467 /*
 468  * Forward decl that will remind us if its twin in cache.h changes.
 469  * This function is used in compat/pread.c.  But we can't include
 470  * cache.h there.
 471  */
 472 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 473
 474 #ifdef NO_SETENV
 475 #define setenv gitsetenv
 476 extern int gitsetenv(const char *, const char *, int);
 477 #endif
 478
 479 #ifdef NO_MKDTEMP
 480 #define mkdtemp gitmkdtemp
 481 extern char *gitmkdtemp(char *);
 482 #endif
 483
 484 #ifdef NO_MKSTEMPS
 485 #define mkstemps gitmkstemps
 486 extern int gitmkstemps(char *, int);
 487 #endif
 488
 489 #ifdef NO_UNSETENV
 490 #define unsetenv gitunsetenv
 491 extern void gitunsetenv(const char *);
 492 #endif
 493
 494 #ifdef NO_STRCASESTR
 495 #define strcasestr gitstrcasestr
 496 extern char *gitstrcasestr(const char *haystack, const char *needle);
 497 #endif
 498
 499 #ifdef NO_STRLCPY
 500 #define strlcpy gitstrlcpy
 501 extern size_t gitstrlcpy(char *, const char *, size_t);
 502 #endif
 503
 504 #ifdef NO_STRTOUMAX
 505 #define strtoumax gitstrtoumax
 506 extern uintmax_t gitstrtoumax(const char *, char **, int);
 507 #define strtoimax gitstrtoimax
 508 extern intmax_t gitstrtoimax(const char *, char **, int);
 509 #endif
 510
 511 #ifdef NO_HSTRERROR
 512 #define hstrerror githstrerror
 513 extern const char *githstrerror(int herror);
 514 #endif
 515
 516 #ifdef NO_MEMMEM
 517 #define memmem gitmemmem
 518 void *gitmemmem(const void *haystack, size_t haystacklen,
 519                 const void *needle, size_t needlelen);
 520 #endif
 521
 522 #ifdef NO_GETPAGESIZE
 523 #define getpagesize() sysconf(_SC_PAGESIZE)
 524 #endif
 525
 526 #ifdef FREAD_READS_DIRECTORIES
 527 #ifdef fopen
 528 #undef fopen
 529 #endif
 530 #define fopen(a,b) git_fopen(a,b)
 531 extern FILE *git_fopen(const char*, const char*);
 532 #endif
 533
 534 #ifdef SNPRINTF_RETURNS_BOGUS
 535 #ifdef snprintf
 536 #undef snprintf
 537 #endif
 538 #define snprintf git_snprintf
 539 extern int git_snprintf(char *str, size_t maxsize,
 540                         const char *format, ...);
 541 #ifdef vsnprintf
 542 #undef vsnprintf
 543 #endif
 544 #define vsnprintf git_vsnprintf
 545 extern int git_vsnprintf(char *str, size_t maxsize,
 546                          const char *format, va_list ap);
 547 #endif
 548
 549 #ifdef __GLIBC_PREREQ
 550 #if __GLIBC_PREREQ(2, 1)
 551 #define HAVE_STRCHRNUL
 552 #define HAVE_MEMPCPY
 553 #endif
 554 #endif
 555
 556 #ifndef HAVE_STRCHRNUL
 557 #define strchrnul gitstrchrnul
 558 static inline char *gitstrchrnul(const char *s, int c)
 559 {
 560         while (*s && *s != c)
 561                 s++;
 562         return (char *)s;
 563 }
 564 #endif
 565
 566 #ifndef HAVE_MEMPCPY
 567 #define mempcpy gitmempcpy
 568 static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 569 {
 570         return (char *)memcpy(dest, src, n) + n;
 571 }
 572 #endif
 573
 574 #ifdef NO_INET_PTON
 575 int inet_pton(int af, const char *src, void *dst);
 576 #endif
 577
 578 #ifdef NO_INET_NTOP
 579 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 580 #endif
 581
 582 extern void release_pack_memory(size_t);
 583
 584 typedef void (*try_to_free_t)(size_t);
 585 extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 586
 587 #ifdef HAVE_ALLOCA_H
 588 # include <alloca.h>
 589 # define xalloca(size)      (alloca(size))
 590 # define xalloca_free(p)    do {} while (0)
 591 #else
 592 # define xalloca(size)      (xmalloc(size))
 593 # define xalloca_free(p)    (free(p))
 594 #endif
 595 extern char *xstrdup(const char *str);
 596 extern void *xmalloc(size_t size);
 597 extern void *xmallocz(size_t size);
 598 extern void *xmemdupz(const void *data, size_t len);
 599 extern char *xstrndup(const char *str, size_t len);
 600 extern void *xrealloc(void *ptr, size_t size);
 601 extern void *xcalloc(size_t nmemb, size_t size);
 602 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 603 extern ssize_t xread(int fd, void *buf, size_t len);
 604 extern ssize_t xwrite(int fd, const void *buf, size_t len);
 605 extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 606 extern int xdup(int fd);
 607 extern FILE *xfdopen(int fd, const char *mode);
 608 extern int xmkstemp(char *template);
 609 extern int xmkstemp_mode(char *template, int mode);
 610 extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 611 extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 612
 613 static inline size_t xsize_t(off_t len)
 614 {
 615         if (len > (size_t) len)
 616                 die("Cannot handle files this big");
 617         return (size_t)len;
 618 }
 619
 620 /* in ctype.c, for kwset users */
 621 extern const char tolower_trans_tbl[256];
 622
 623 /* Sane ctype - no locale, and works with signed chars */
 624 #undef isascii
 625 #undef isspace
 626 #undef isdigit
 627 #undef isalpha
 628 #undef isalnum
 629 #undef isprint
 630 #undef islower
 631 #undef isupper
 632 #undef tolower
 633 #undef toupper
 634 #undef iscntrl
 635 #undef ispunct
 636 #undef isxdigit
 637
 638 extern const unsigned char sane_ctype[256];
 639 #define GIT_SPACE 0x01
 640 #define GIT_DIGIT 0x02
 641 #define GIT_ALPHA 0x04
 642 #define GIT_GLOB_SPECIAL 0x08
 643 #define GIT_REGEX_SPECIAL 0x10
 644 #define GIT_PATHSPEC_MAGIC 0x20
 645 #define GIT_CNTRL 0x40
 646 #define GIT_PUNCT 0x80
 647 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 648 #define isascii(x) (((x) & ~0x7f) == 0)
 649 #define isspace(x) sane_istest(x,GIT_SPACE)
 650 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 651 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 652 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 653 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 654 #define islower(x) sane_iscase(x, 1)
 655 #define isupper(x) sane_iscase(x, 0)
 656 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 657 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 658 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 659 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 660                 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 661 #define isxdigit(x) (hexval_table[x] != -1)
 662 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 663 #define toupper(x) sane_case((unsigned char)(x), 0)
 664 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 665
 666 static inline int sane_case(int x, int high)
 667 {
 668         if (sane_istest(x, GIT_ALPHA))
 669                 x = (x & ~0x20) | high;
 670         return x;
 671 }
 672
 673 static inline int sane_iscase(int x, int is_lower)
 674 {
 675         if (!sane_istest(x, GIT_ALPHA))
 676                 return 0;
 677
 678         if (is_lower)
 679                 return (x & 0x20) != 0;
 680         else
 681                 return (x & 0x20) == 0;
 682 }
 683
 684 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 685 {
 686         unsigned long ul;
 687         char *p;
 688
 689         errno = 0;
 690         ul = strtoul(s, &p, base);
 691         if (errno || *p || p == s || (unsigned int) ul != ul)
 692                 return -1;
 693         *result = ul;
 694         return 0;
 695 }
 696
 697 static inline int strtol_i(char const *s, int base, int *result)
 698 {
 699         long ul;
 700         char *p;
 701
 702         errno = 0;
 703         ul = strtol(s, &p, base);
 704         if (errno || *p || p == s || (int) ul != ul)
 705                 return -1;
 706         *result = ul;
 707         return 0;
 708 }
 709
 710 #ifdef INTERNAL_QSORT
 711 void git_qsort(void *base, size_t nmemb, size_t size,
 712                int(*compar)(const void *, const void *));
 713 #define qsort git_qsort
 714 #endif
 715
 716 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 717 # define FORCE_DIR_SET_GID S_ISGID
 718 #else
 719 # define FORCE_DIR_SET_GID 0
 720 #endif
 721
 722 #ifdef NO_NSEC
 723 #undef USE_NSEC
 724 #define ST_CTIME_NSEC(st) 0
 725 #define ST_MTIME_NSEC(st) 0
 726 #else
 727 #ifdef USE_ST_TIMESPEC
 728 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 729 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 730 #else
 731 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 732 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 733 #endif
 734 #endif
 735
 736 #ifdef UNRELIABLE_FSTAT
 737 #define fstat_is_reliable() 0
 738 #else
 739 #define fstat_is_reliable() 1
 740 #endif
 741
 742 #ifndef va_copy
 743 /*
 744  * Since an obvious implementation of va_list would be to make it a
 745  * pointer into the stack frame, a simple assignment will work on
 746  * many systems.  But let's try to be more portable.
 747  */
 748 #ifdef __va_copy
 749 #define va_copy(dst, src) __va_copy(dst, src)
 750 #else
 751 #define va_copy(dst, src) ((dst) = (src))
 752 #endif
 753 #endif
 754
 755 #if defined(__GNUC__) || (_MSC_VER >= 1400)
 756 #define HAVE_VARIADIC_MACROS 1
 757 #endif
 758
 759 /*
 760  * Preserves errno, prints a message, but gives no warning for ENOENT.
 761  * Always returns the return value of unlink(2).
 762  */
 763 int unlink_or_warn(const char *path);
 764 /*
 765  * Likewise for rmdir(2).
 766  */
 767 int rmdir_or_warn(const char *path);
 768 /*
 769  * Calls the correct function out of {unlink,rmdir}_or_warn based on
 770  * the supplied file mode.
 771  */
 772 int remove_or_warn(unsigned int mode, const char *path);
 773
 774 /*
 775  * Call access(2), but warn for any error except "missing file"
 776  * (ENOENT or ENOTDIR).
 777  */
 778 #define ACCESS_EACCES_OK (1U << 0)
 779 int access_or_warn(const char *path, int mode, unsigned flag);
 780 int access_or_die(const char *path, int mode, unsigned flag);
 781
 782 /* Warn on an inaccessible file that ought to be accessible */
 783 void warn_on_inaccessible(const char *path);
 784
 785 /* Get the passwd entry for the UID of the current process. */
 786 struct passwd *xgetpwuid_self(void);
 787
 788 #ifdef GMTIME_UNRELIABLE_ERRORS
 789 struct tm *git_gmtime(const time_t *);
 790 struct tm *git_gmtime_r(const time_t *, struct tm *);
 791 #define gmtime git_gmtime
 792 #define gmtime_r git_gmtime_r
 793 #endif
 794
 795 #ifndef mark_as_git_dir
 796 #define mark_as_git_dir(x) /* noop */
 797 #endif
 798
 799 /*
 800  * Enable/disable a read-only cache for file system data on platforms that
 801  * support it.
 802  *
 803  * Implementing a live-cache is complicated and requires special platform
 804  * support (inotify, ReadDirectoryChangesW...). enable_fscache shall be used
 805  * to mark sections of git code that extensively read from the file system
 806  * without modifying anything. Implementations can use this to cache e.g. stat
 807  * data or even file content without the need to synchronize with the file
 808  * system.
 809  */
 810 #ifndef enable_fscache
 811 #define enable_fscache(x) /* noop */
 812 #endif
 813
 814 #endif