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 _DEFAULT_SOURCE 1
  86 #define _NETBSD_SOURCE 1
  87 #define _SGI_SOURCE 1
  88
  89 #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
  90 # if defined (_MSC_VER) && !defined(_WIN32_WINNT)
  91 #  define _WIN32_WINNT 0x0502
  92 # endif
  93 #define WIN32_LEAN_AND_MEAN  /* stops windows.h including winsock.h */
  94 #include <winsock2.h>
  95 #include <windows.h>
  96 #define GIT_WINDOWS_NATIVE
  97 #endif
  98
  99 #include <unistd.h>
 100 #include <stdio.h>
 101 #include <sys/stat.h>
 102 #include <fcntl.h>
 103 #include <stddef.h>
 104 #include <stdlib.h>
 105 #include <stdarg.h>
 106 #include <string.h>
 107 #ifdef HAVE_STRINGS_H
 108 #include <strings.h> /* for strcasecmp() */
 109 #endif
 110 #include <errno.h>
 111 #include <limits.h>
 112 #ifdef NEEDS_SYS_PARAM_H
 113 #include <sys/param.h>
 114 #endif
 115 #include <sys/types.h>
 116 #include <dirent.h>
 117 #include <sys/time.h>
 118 #include <time.h>
 119 #include <signal.h>
 120 #include <assert.h>
 121 #include <regex.h>
 122 #include <utime.h>
 123 #include <syslog.h>
 124 #ifndef NO_SYS_POLL_H
 125 #include <sys/poll.h>
 126 #else
 127 #include <poll.h>
 128 #endif
 129
 130 #if defined(__MINGW32__)
 131 /* pull in Windows compatibility stuff */
 132 #include "compat/mingw.h"
 133 #elif defined(_MSC_VER)
 134 #include "compat/msvc.h"
 135 #else
 136 #include <sys/wait.h>
 137 #include <sys/resource.h>
 138 #include <sys/socket.h>
 139 #include <sys/ioctl.h>
 140 #include <termios.h>
 141 #ifndef NO_SYS_SELECT_H
 142 #include <sys/select.h>
 143 #endif
 144 #include <netinet/in.h>
 145 #include <netinet/tcp.h>
 146 #include <arpa/inet.h>
 147 #include <netdb.h>
 148 #include <pwd.h>
 149 #include <sys/un.h>
 150 #ifndef NO_INTTYPES_H
 151 #include <inttypes.h>
 152 #else
 153 #include <stdint.h>
 154 #endif
 155 #ifdef NO_INTPTR_T
 156 /*
 157  * On I16LP32, ILP32 and LP64 "long" is the save bet, however
 158  * on LLP86, IL33LLP64 and P64 it needs to be "long long",
 159  * while on IP16 and IP16L32 it is "int" (resp. "short")
 160  * Size needs to match (or exceed) 'sizeof(void *)'.
 161  * We can't take "long long" here as not everybody has it.
 162  */
 163 typedef long intptr_t;
 164 typedef unsigned long uintptr_t;
 165 #endif
 166 #if defined(__CYGWIN__)
 167 #undef _XOPEN_SOURCE
 168 #include <grp.h>
 169 #define _XOPEN_SOURCE 600
 170 #else
 171 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
 172 #include <grp.h>
 173 #define _ALL_SOURCE 1
 174 #endif
 175 #endif
 176
 177 /* used on Mac OS X */
 178 #ifdef PRECOMPOSE_UNICODE
 179 #include "compat/precompose_utf8.h"
 180 #else
 181 #define precompose_str(in,i_nfd2nfc)
 182 #define precompose_argv(c,v)
 183 #define probe_utf8_pathname_composition(a,b)
 184 #endif
 185
 186 #ifdef MKDIR_WO_TRAILING_SLASH
 187 #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
 188 extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
 189 #endif
 190
 191 #ifdef NO_STRUCT_ITIMERVAL
 192 struct itimerval {
 193         struct timeval it_interval;
 194         struct timeval it_value;
 195 };
 196 #endif
 197
 198 #ifdef NO_SETITIMER
 199 #define setitimer(which,value,ovalue)
 200 #endif
 201
 202 #ifndef NO_LIBGEN_H
 203 #include <libgen.h>
 204 #else
 205 #define basename gitbasename
 206 extern char *gitbasename(char *);
 207 #endif
 208
 209 #ifndef NO_ICONV
 210 #include <iconv.h>
 211 #endif
 212
 213 #ifndef NO_OPENSSL
 214 #include <openssl/ssl.h>
 215 #include <openssl/err.h>
 216 #endif
 217
 218 /* On most systems <netdb.h> would have given us this, but
 219  * not on some systems (e.g. z/OS).
 220  */
 221 #ifndef NI_MAXHOST
 222 #define NI_MAXHOST 1025
 223 #endif
 224
 225 #ifndef NI_MAXSERV
 226 #define NI_MAXSERV 32
 227 #endif
 228
 229 /* On most systems <limits.h> would have given us this, but
 230  * not on some systems (e.g. GNU/Hurd).
 231  */
 232 #ifndef PATH_MAX
 233 #define PATH_MAX 4096
 234 #endif
 235
 236 #ifndef PRIuMAX
 237 #define PRIuMAX "llu"
 238 #endif
 239
 240 #ifndef PRIu32
 241 #define PRIu32 "u"
 242 #endif
 243
 244 #ifndef PRIx32
 245 #define PRIx32 "x"
 246 #endif
 247
 248 #ifndef PRIo32
 249 #define PRIo32 "o"
 250 #endif
 251
 252 #ifndef PATH_SEP
 253 #define PATH_SEP ':'
 254 #endif
 255
 256 #ifdef HAVE_PATHS_H
 257 #include <paths.h>
 258 #endif
 259 #ifndef _PATH_DEFPATH
 260 #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
 261 #endif
 262
 263 #ifndef STRIP_EXTENSION
 264 #define STRIP_EXTENSION ""
 265 #endif
 266
 267 #ifndef has_dos_drive_prefix
 268 static inline int git_has_dos_drive_prefix(const char *path)
 269 {
 270         return 0;
 271 }
 272 #define has_dos_drive_prefix git_has_dos_drive_prefix
 273 #endif
 274
 275 #ifndef is_dir_sep
 276 static inline int git_is_dir_sep(int c)
 277 {
 278         return c == '/';
 279 }
 280 #define is_dir_sep git_is_dir_sep
 281 #endif
 282
 283 #ifndef offset_1st_component
 284 static inline int git_offset_1st_component(const char *path)
 285 {
 286         return is_dir_sep(path[0]);
 287 }
 288 #define offset_1st_component git_offset_1st_component
 289 #endif
 290
 291 #ifndef find_last_dir_sep
 292 static inline char *git_find_last_dir_sep(const char *path)
 293 {
 294         return strrchr(path, '/');
 295 }
 296 #define find_last_dir_sep git_find_last_dir_sep
 297 #endif
 298
 299 #if defined(__HP_cc) && (__HP_cc >= 61000)
 300 #define NORETURN __attribute__((noreturn))
 301 #define NORETURN_PTR
 302 #elif defined(__GNUC__) && !defined(NO_NORETURN)
 303 #define NORETURN __attribute__((__noreturn__))
 304 #define NORETURN_PTR __attribute__((__noreturn__))
 305 #elif defined(_MSC_VER)
 306 #define NORETURN __declspec(noreturn)
 307 #define NORETURN_PTR
 308 #else
 309 #define NORETURN
 310 #define NORETURN_PTR
 311 #ifndef __GNUC__
 312 #ifndef __attribute__
 313 #define __attribute__(x)
 314 #endif
 315 #endif
 316 #endif
 317
 318 /* The sentinel attribute is valid from gcc version 4.0 */
 319 #if defined(__GNUC__) && (__GNUC__ >= 4)
 320 #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 321 #else
 322 #define LAST_ARG_MUST_BE_NULL
 323 #endif
 324
 325 #include "compat/bswap.h"
 326
 327 #include "wildmatch.h"
 328
 329 struct strbuf;
 330
 331 /* General helper functions */
 332 extern void vreportf(const char *prefix, const char *err, va_list params);
 333 extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 334 extern NORETURN void usage(const char *err);
 335 extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 336 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 337 extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 338 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 339 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 340
 341 #ifndef NO_OPENSSL
 342 #ifdef APPLE_COMMON_CRYPTO
 343 #include "compat/apple-common-crypto.h"
 344 #else
 345 #include <openssl/evp.h>
 346 #include <openssl/hmac.h>
 347 #endif /* APPLE_COMMON_CRYPTO */
 348 #include <openssl/x509v3.h>
 349 #endif /* NO_OPENSSL */
 350
 351 /*
 352  * Let callers be aware of the constant return value; this can help
 353  * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 354  * because some compilers may not support variadic macros. Since we're only
 355  * trying to help gcc, anyway, it's OK; other compilers will fall back to
 356  * using the function as usual.
 357  */
 358 #if defined(__GNUC__)
 359 static inline int const_error(void)
 360 {
 361         return -1;
 362 }
 363 #define error(...) (error(__VA_ARGS__), const_error())
 364 #endif
 365
 366 extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 367 extern void set_error_routine(void (*routine)(const char *err, va_list params));
 368 extern void set_die_is_recursing_routine(int (*routine)(void));
 369
 370 extern int starts_with(const char *str, const char *prefix);
 371
 372 /*
 373  * If the string "str" begins with the string found in "prefix", return 1.
 374  * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 375  * the string right after the prefix).
 376  *
 377  * Otherwise, return 0 and leave "out" untouched.
 378  *
 379  * Examples:
 380  *
 381  *   [extract branch name, fail if not a branch]
 382  *   if (!skip_prefix(ref, "refs/heads/", &branch)
 383  *      return -1;
 384  *
 385  *   [skip prefix if present, otherwise use whole string]
 386  *   skip_prefix(name, "refs/heads/", &name);
 387  */
 388 static inline int skip_prefix(const char *str, const char *prefix,
 389                               const char **out)
 390 {
 391         do {
 392                 if (!*prefix) {
 393                         *out = str;
 394                         return 1;
 395                 }
 396         } while (*str++ == *prefix++);
 397         return 0;
 398 }
 399
 400 /*
 401  * If buf ends with suffix, return 1 and subtract the length of the suffix
 402  * from *len. Otherwise, return 0 and leave *len untouched.
 403  */
 404 static inline int strip_suffix_mem(const char *buf, size_t *len,
 405                                    const char *suffix)
 406 {
 407         size_t suflen = strlen(suffix);
 408         if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 409                 return 0;
 410         *len -= suflen;
 411         return 1;
 412 }
 413
 414 /*
 415  * If str ends with suffix, return 1 and set *len to the size of the string
 416  * without the suffix. Otherwise, return 0 and set *len to the size of the
 417  * string.
 418  *
 419  * Note that we do _not_ NUL-terminate str to the new length.
 420  */
 421 static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 422 {
 423         *len = strlen(str);
 424         return strip_suffix_mem(str, len, suffix);
 425 }
 426
 427 static inline int ends_with(const char *str, const char *suffix)
 428 {
 429         size_t len;
 430         return strip_suffix(str, suffix, &len);
 431 }
 432
 433 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 434
 435 #ifndef PROT_READ
 436 #define PROT_READ 1
 437 #define PROT_WRITE 2
 438 #define MAP_PRIVATE 1
 439 #endif
 440
 441 #define mmap git_mmap
 442 #define munmap git_munmap
 443 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 444 extern int git_munmap(void *start, size_t length);
 445
 446 #else /* NO_MMAP || USE_WIN32_MMAP */
 447
 448 #include <sys/mman.h>
 449
 450 #endif /* NO_MMAP || USE_WIN32_MMAP */
 451
 452 #ifdef NO_MMAP
 453
 454 /* This value must be multiple of (pagesize * 2) */
 455 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 456
 457 #else /* NO_MMAP */
 458
 459 /* This value must be multiple of (pagesize * 2) */
 460 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 461         (sizeof(void*) >= 8 \
 462                 ?  1 * 1024 * 1024 * 1024 \
 463                 : 32 * 1024 * 1024)
 464
 465 #endif /* NO_MMAP */
 466
 467 #ifndef MAP_FAILED
 468 #define MAP_FAILED ((void *)-1)
 469 #endif
 470
 471 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 472 #define on_disk_bytes(st) ((st).st_size)
 473 #else
 474 #define on_disk_bytes(st) ((st).st_blocks * 512)
 475 #endif
 476
 477 #define DEFAULT_PACKED_GIT_LIMIT \
 478         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 479
 480 #ifdef NO_PREAD
 481 #define pread git_pread
 482 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 483 #endif
 484 /*
 485  * Forward decl that will remind us if its twin in cache.h changes.
 486  * This function is used in compat/pread.c.  But we can't include
 487  * cache.h there.
 488  */
 489 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 490
 491 #ifdef NO_SETENV
 492 #define setenv gitsetenv
 493 extern int gitsetenv(const char *, const char *, int);
 494 #endif
 495
 496 #ifdef NO_MKDTEMP
 497 #define mkdtemp gitmkdtemp
 498 extern char *gitmkdtemp(char *);
 499 #endif
 500
 501 #ifdef NO_MKSTEMPS
 502 #define mkstemps gitmkstemps
 503 extern int gitmkstemps(char *, int);
 504 #endif
 505
 506 #ifdef NO_UNSETENV
 507 #define unsetenv gitunsetenv
 508 extern void gitunsetenv(const char *);
 509 #endif
 510
 511 #ifdef NO_STRCASESTR
 512 #define strcasestr gitstrcasestr
 513 extern char *gitstrcasestr(const char *haystack, const char *needle);
 514 #endif
 515
 516 #ifdef NO_STRLCPY
 517 #define strlcpy gitstrlcpy
 518 extern size_t gitstrlcpy(char *, const char *, size_t);
 519 #endif
 520
 521 #ifdef NO_STRTOUMAX
 522 #define strtoumax gitstrtoumax
 523 extern uintmax_t gitstrtoumax(const char *, char **, int);
 524 #define strtoimax gitstrtoimax
 525 extern intmax_t gitstrtoimax(const char *, char **, int);
 526 #endif
 527
 528 #ifdef NO_HSTRERROR
 529 #define hstrerror githstrerror
 530 extern const char *githstrerror(int herror);
 531 #endif
 532
 533 #ifdef NO_MEMMEM
 534 #define memmem gitmemmem
 535 void *gitmemmem(const void *haystack, size_t haystacklen,
 536                 const void *needle, size_t needlelen);
 537 #endif
 538
 539 #ifdef NO_GETPAGESIZE
 540 #define getpagesize() sysconf(_SC_PAGESIZE)
 541 #endif
 542
 543 #ifdef FREAD_READS_DIRECTORIES
 544 #ifdef fopen
 545 #undef fopen
 546 #endif
 547 #define fopen(a,b) git_fopen(a,b)
 548 extern FILE *git_fopen(const char*, const char*);
 549 #endif
 550
 551 #ifdef SNPRINTF_RETURNS_BOGUS
 552 #ifdef snprintf
 553 #undef snprintf
 554 #endif
 555 #define snprintf git_snprintf
 556 extern int git_snprintf(char *str, size_t maxsize,
 557                         const char *format, ...);
 558 #ifdef vsnprintf
 559 #undef vsnprintf
 560 #endif
 561 #define vsnprintf git_vsnprintf
 562 extern int git_vsnprintf(char *str, size_t maxsize,
 563                          const char *format, va_list ap);
 564 #endif
 565
 566 #ifdef __GLIBC_PREREQ
 567 #if __GLIBC_PREREQ(2, 1)
 568 #define HAVE_STRCHRNUL
 569 #define HAVE_MEMPCPY
 570 #endif
 571 #endif
 572
 573 #ifndef HAVE_STRCHRNUL
 574 #define strchrnul gitstrchrnul
 575 static inline char *gitstrchrnul(const char *s, int c)
 576 {
 577         while (*s && *s != c)
 578                 s++;
 579         return (char *)s;
 580 }
 581 #endif
 582
 583 #ifndef HAVE_MEMPCPY
 584 #define mempcpy gitmempcpy
 585 static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 586 {
 587         return (char *)memcpy(dest, src, n) + n;
 588 }
 589 #endif
 590
 591 #ifdef NO_INET_PTON
 592 int inet_pton(int af, const char *src, void *dst);
 593 #endif
 594
 595 #ifdef NO_INET_NTOP
 596 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 597 #endif
 598
 599 #ifdef NO_PTHREADS
 600 #define atexit git_atexit
 601 extern int git_atexit(void (*handler)(void));
 602 #endif
 603
 604 extern void release_pack_memory(size_t);
 605
 606 typedef void (*try_to_free_t)(size_t);
 607 extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 608
 609 #ifdef HAVE_ALLOCA_H
 610 # include <alloca.h>
 611 # define xalloca(size)      (alloca(size))
 612 # define xalloca_free(p)    do {} while (0)
 613 #else
 614 # define xalloca(size)      (xmalloc(size))
 615 # define xalloca_free(p)    (free(p))
 616 #endif
 617 extern char *xstrdup(const char *str);
 618 extern void *xmalloc(size_t size);
 619 extern void *xmallocz(size_t size);
 620 extern void *xmallocz_gently(size_t size);
 621 extern void *xmemdupz(const void *data, size_t len);
 622 extern char *xstrndup(const char *str, size_t len);
 623 extern void *xrealloc(void *ptr, size_t size);
 624 extern void *xcalloc(size_t nmemb, size_t size);
 625 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 626 extern ssize_t xread(int fd, void *buf, size_t len);
 627 extern ssize_t xwrite(int fd, const void *buf, size_t len);
 628 extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 629 extern int xdup(int fd);
 630 extern FILE *xfdopen(int fd, const char *mode);
 631 extern int xmkstemp(char *template);
 632 extern int xmkstemp_mode(char *template, int mode);
 633 extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 634 extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 635 extern char *xgetcwd(void);
 636
 637 #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
 638
 639 static inline size_t xsize_t(off_t len)
 640 {
 641         if (len > (size_t) len)
 642                 die("Cannot handle files this big");
 643         return (size_t)len;
 644 }
 645
 646 /* in ctype.c, for kwset users */
 647 extern const char tolower_trans_tbl[256];
 648
 649 /* Sane ctype - no locale, and works with signed chars */
 650 #undef isascii
 651 #undef isspace
 652 #undef isdigit
 653 #undef isalpha
 654 #undef isalnum
 655 #undef isprint
 656 #undef islower
 657 #undef isupper
 658 #undef tolower
 659 #undef toupper
 660 #undef iscntrl
 661 #undef ispunct
 662 #undef isxdigit
 663
 664 extern const unsigned char sane_ctype[256];
 665 #define GIT_SPACE 0x01
 666 #define GIT_DIGIT 0x02
 667 #define GIT_ALPHA 0x04
 668 #define GIT_GLOB_SPECIAL 0x08
 669 #define GIT_REGEX_SPECIAL 0x10
 670 #define GIT_PATHSPEC_MAGIC 0x20
 671 #define GIT_CNTRL 0x40
 672 #define GIT_PUNCT 0x80
 673 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 674 #define isascii(x) (((x) & ~0x7f) == 0)
 675 #define isspace(x) sane_istest(x,GIT_SPACE)
 676 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 677 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 678 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 679 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 680 #define islower(x) sane_iscase(x, 1)
 681 #define isupper(x) sane_iscase(x, 0)
 682 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 683 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 684 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 685 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 686                 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 687 #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
 688 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 689 #define toupper(x) sane_case((unsigned char)(x), 0)
 690 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 691
 692 static inline int sane_case(int x, int high)
 693 {
 694         if (sane_istest(x, GIT_ALPHA))
 695                 x = (x & ~0x20) | high;
 696         return x;
 697 }
 698
 699 static inline int sane_iscase(int x, int is_lower)
 700 {
 701         if (!sane_istest(x, GIT_ALPHA))
 702                 return 0;
 703
 704         if (is_lower)
 705                 return (x & 0x20) != 0;
 706         else
 707                 return (x & 0x20) == 0;
 708 }
 709
 710 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 711 {
 712         unsigned long ul;
 713         char *p;
 714
 715         errno = 0;
 716         ul = strtoul(s, &p, base);
 717         if (errno || *p || p == s || (unsigned int) ul != ul)
 718                 return -1;
 719         *result = ul;
 720         return 0;
 721 }
 722
 723 static inline int strtol_i(char const *s, int base, int *result)
 724 {
 725         long ul;
 726         char *p;
 727
 728         errno = 0;
 729         ul = strtol(s, &p, base);
 730         if (errno || *p || p == s || (int) ul != ul)
 731                 return -1;
 732         *result = ul;
 733         return 0;
 734 }
 735
 736 #ifdef INTERNAL_QSORT
 737 void git_qsort(void *base, size_t nmemb, size_t size,
 738                int(*compar)(const void *, const void *));
 739 #define qsort git_qsort
 740 #endif
 741
 742 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 743 # define FORCE_DIR_SET_GID S_ISGID
 744 #else
 745 # define FORCE_DIR_SET_GID 0
 746 #endif
 747
 748 #ifdef NO_NSEC
 749 #undef USE_NSEC
 750 #define ST_CTIME_NSEC(st) 0
 751 #define ST_MTIME_NSEC(st) 0
 752 #else
 753 #ifdef USE_ST_TIMESPEC
 754 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 755 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 756 #else
 757 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 758 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 759 #endif
 760 #endif
 761
 762 #ifdef UNRELIABLE_FSTAT
 763 #define fstat_is_reliable() 0
 764 #else
 765 #define fstat_is_reliable() 1
 766 #endif
 767
 768 #ifndef va_copy
 769 /*
 770  * Since an obvious implementation of va_list would be to make it a
 771  * pointer into the stack frame, a simple assignment will work on
 772  * many systems.  But let's try to be more portable.
 773  */
 774 #ifdef __va_copy
 775 #define va_copy(dst, src) __va_copy(dst, src)
 776 #else
 777 #define va_copy(dst, src) ((dst) = (src))
 778 #endif
 779 #endif
 780
 781 #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
 782 #define HAVE_VARIADIC_MACROS 1
 783 #endif
 784
 785 /*
 786  * Preserves errno, prints a message, but gives no warning for ENOENT.
 787  * Returns 0 on success, which includes trying to unlink an object that does
 788  * not exist.
 789  */
 790 int unlink_or_warn(const char *path);
 791  /*
 792   * Tries to unlink file.  Returns 0 if unlink succeeded
 793   * or the file already didn't exist.  Returns -1 and
 794   * appends a message to err suitable for
 795   * 'error("%s", err->buf)' on error.
 796   */
 797 int unlink_or_msg(const char *file, struct strbuf *err);
 798 /*
 799  * Preserves errno, prints a message, but gives no warning for ENOENT.
 800  * Returns 0 on success, which includes trying to remove a directory that does
 801  * not exist.
 802  */
 803 int rmdir_or_warn(const char *path);
 804 /*
 805  * Calls the correct function out of {unlink,rmdir}_or_warn based on
 806  * the supplied file mode.
 807  */
 808 int remove_or_warn(unsigned int mode, const char *path);
 809
 810 /*
 811  * Call access(2), but warn for any error except "missing file"
 812  * (ENOENT or ENOTDIR).
 813  */
 814 #define ACCESS_EACCES_OK (1U << 0)
 815 int access_or_warn(const char *path, int mode, unsigned flag);
 816 int access_or_die(const char *path, int mode, unsigned flag);
 817
 818 /* Warn on an inaccessible file that ought to be accessible */
 819 void warn_on_inaccessible(const char *path);
 820
 821 /* Get the passwd entry for the UID of the current process. */
 822 struct passwd *xgetpwuid_self(void);
 823
 824 #ifdef GMTIME_UNRELIABLE_ERRORS
 825 struct tm *git_gmtime(const time_t *);
 826 struct tm *git_gmtime_r(const time_t *, struct tm *);
 827 #define gmtime git_gmtime
 828 #define gmtime_r git_gmtime_r
 829 #endif
 830
 831 #endif