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 offset_1st_component
 271 #define offset_1st_component(path) (is_dir_sep((path)[0]))
 272 #endif
 273
 274 #ifndef is_dir_sep
 275 #define is_dir_sep(c) ((c) == '/')
 276 #endif
 277
 278 #ifndef find_last_dir_sep
 279 #define find_last_dir_sep(path) strrchr(path, '/')
 280 #endif
 281
 282 #if defined(__HP_cc) && (__HP_cc >= 61000)
 283 #define NORETURN __attribute__((noreturn))
 284 #define NORETURN_PTR
 285 #elif defined(__GNUC__) && !defined(NO_NORETURN)
 286 #define NORETURN __attribute__((__noreturn__))
 287 #define NORETURN_PTR __attribute__((__noreturn__))
 288 #elif defined(_MSC_VER)
 289 #define NORETURN __declspec(noreturn)
 290 #define NORETURN_PTR
 291 #else
 292 #define NORETURN
 293 #define NORETURN_PTR
 294 #ifndef __GNUC__
 295 #ifndef __attribute__
 296 #define __attribute__(x)
 297 #endif
 298 #endif
 299 #endif
 300
 301 /* The sentinel attribute is valid from gcc version 4.0 */
 302 #if defined(__GNUC__) && (__GNUC__ >= 4)
 303 #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 304 #else
 305 #define LAST_ARG_MUST_BE_NULL
 306 #endif
 307
 308 #include "compat/bswap.h"
 309
 310 #include "wildmatch.h"
 311
 312 /* General helper functions */
 313 extern void vreportf(const char *prefix, const char *err, va_list params);
 314 extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 315 extern NORETURN void usage(const char *err);
 316 extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 317 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 318 extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 319 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 320 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 321
 322 #ifndef NO_OPENSSL
 323 #ifdef APPLE_COMMON_CRYPTO
 324 #include "compat/apple-common-crypto.h"
 325 #else
 326 #include <openssl/evp.h>
 327 #include <openssl/hmac.h>
 328 #endif /* APPLE_COMMON_CRYPTO */
 329 #include <openssl/x509v3.h>
 330 #endif /* NO_OPENSSL */
 331
 332 /*
 333  * Let callers be aware of the constant return value; this can help
 334  * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 335  * because some compilers may not support variadic macros. Since we're only
 336  * trying to help gcc, anyway, it's OK; other compilers will fall back to
 337  * using the function as usual.
 338  */
 339 #if defined(__GNUC__)
 340 static inline int const_error(void)
 341 {
 342         return -1;
 343 }
 344 #define error(...) (error(__VA_ARGS__), const_error())
 345 #endif
 346
 347 extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 348 extern void set_error_routine(void (*routine)(const char *err, va_list params));
 349 extern void set_die_is_recursing_routine(int (*routine)(void));
 350
 351 extern int starts_with(const char *str, const char *prefix);
 352
 353 /*
 354  * If the string "str" begins with the string found in "prefix", return 1.
 355  * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 356  * the string right after the prefix).
 357  *
 358  * Otherwise, return 0 and leave "out" untouched.
 359  *
 360  * Examples:
 361  *
 362  *   [extract branch name, fail if not a branch]
 363  *   if (!skip_prefix(ref, "refs/heads/", &branch)
 364  *      return -1;
 365  *
 366  *   [skip prefix if present, otherwise use whole string]
 367  *   skip_prefix(name, "refs/heads/", &name);
 368  */
 369 static inline int skip_prefix(const char *str, const char *prefix,
 370                               const char **out)
 371 {
 372         do {
 373                 if (!*prefix) {
 374                         *out = str;
 375                         return 1;
 376                 }
 377         } while (*str++ == *prefix++);
 378         return 0;
 379 }
 380
 381 /*
 382  * If buf ends with suffix, return 1 and subtract the length of the suffix
 383  * from *len. Otherwise, return 0 and leave *len untouched.
 384  */
 385 static inline int strip_suffix_mem(const char *buf, size_t *len,
 386                                    const char *suffix)
 387 {
 388         size_t suflen = strlen(suffix);
 389         if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 390                 return 0;
 391         *len -= suflen;
 392         return 1;
 393 }
 394
 395 /*
 396  * If str ends with suffix, return 1 and set *len to the size of the string
 397  * without the suffix. Otherwise, return 0 and set *len to the size of the
 398  * string.
 399  *
 400  * Note that we do _not_ NUL-terminate str to the new length.
 401  */
 402 static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 403 {
 404         *len = strlen(str);
 405         return strip_suffix_mem(str, len, suffix);
 406 }
 407
 408 static inline int ends_with(const char *str, const char *suffix)
 409 {
 410         size_t len;
 411         return strip_suffix(str, suffix, &len);
 412 }
 413
 414 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 415
 416 #ifndef PROT_READ
 417 #define PROT_READ 1
 418 #define PROT_WRITE 2
 419 #define MAP_PRIVATE 1
 420 #endif
 421
 422 #define mmap git_mmap
 423 #define munmap git_munmap
 424 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 425 extern int git_munmap(void *start, size_t length);
 426
 427 #else /* NO_MMAP || USE_WIN32_MMAP */
 428
 429 #include <sys/mman.h>
 430
 431 #endif /* NO_MMAP || USE_WIN32_MMAP */
 432
 433 #ifdef NO_MMAP
 434
 435 /* This value must be multiple of (pagesize * 2) */
 436 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 437
 438 #else /* NO_MMAP */
 439
 440 /* This value must be multiple of (pagesize * 2) */
 441 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 442         (sizeof(void*) >= 8 \
 443                 ?  1 * 1024 * 1024 * 1024 \
 444                 : 32 * 1024 * 1024)
 445
 446 #endif /* NO_MMAP */
 447
 448 #ifndef MAP_FAILED
 449 #define MAP_FAILED ((void *)-1)
 450 #endif
 451
 452 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 453 #define on_disk_bytes(st) ((st).st_size)
 454 #else
 455 #define on_disk_bytes(st) ((st).st_blocks * 512)
 456 #endif
 457
 458 #define DEFAULT_PACKED_GIT_LIMIT \
 459         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 460
 461 #ifdef NO_PREAD
 462 #define pread git_pread
 463 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 464 #endif
 465 /*
 466  * Forward decl that will remind us if its twin in cache.h changes.
 467  * This function is used in compat/pread.c.  But we can't include
 468  * cache.h there.
 469  */
 470 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 471
 472 #ifdef NO_SETENV
 473 #define setenv gitsetenv
 474 extern int gitsetenv(const char *, const char *, int);
 475 #endif
 476
 477 #ifdef NO_MKDTEMP
 478 #define mkdtemp gitmkdtemp
 479 extern char *gitmkdtemp(char *);
 480 #endif
 481
 482 #ifdef NO_MKSTEMPS
 483 #define mkstemps gitmkstemps
 484 extern int gitmkstemps(char *, int);
 485 #endif
 486
 487 #ifdef NO_UNSETENV
 488 #define unsetenv gitunsetenv
 489 extern void gitunsetenv(const char *);
 490 #endif
 491
 492 #ifdef NO_STRCASESTR
 493 #define strcasestr gitstrcasestr
 494 extern char *gitstrcasestr(const char *haystack, const char *needle);
 495 #endif
 496
 497 #ifdef NO_STRLCPY
 498 #define strlcpy gitstrlcpy
 499 extern size_t gitstrlcpy(char *, const char *, size_t);
 500 #endif
 501
 502 #ifdef NO_STRTOUMAX
 503 #define strtoumax gitstrtoumax
 504 extern uintmax_t gitstrtoumax(const char *, char **, int);
 505 #define strtoimax gitstrtoimax
 506 extern intmax_t gitstrtoimax(const char *, char **, int);
 507 #endif
 508
 509 #ifdef NO_HSTRERROR
 510 #define hstrerror githstrerror
 511 extern const char *githstrerror(int herror);
 512 #endif
 513
 514 #ifdef NO_MEMMEM
 515 #define memmem gitmemmem
 516 void *gitmemmem(const void *haystack, size_t haystacklen,
 517                 const void *needle, size_t needlelen);
 518 #endif
 519
 520 #ifdef NO_GETPAGESIZE
 521 #define getpagesize() sysconf(_SC_PAGESIZE)
 522 #endif
 523
 524 #ifdef FREAD_READS_DIRECTORIES
 525 #ifdef fopen
 526 #undef fopen
 527 #endif
 528 #define fopen(a,b) git_fopen(a,b)
 529 extern FILE *git_fopen(const char*, const char*);
 530 #endif
 531
 532 #ifdef SNPRINTF_RETURNS_BOGUS
 533 #ifdef snprintf
 534 #undef snprintf
 535 #endif
 536 #define snprintf git_snprintf
 537 extern int git_snprintf(char *str, size_t maxsize,
 538                         const char *format, ...);
 539 #ifdef vsnprintf
 540 #undef vsnprintf
 541 #endif
 542 #define vsnprintf git_vsnprintf
 543 extern int git_vsnprintf(char *str, size_t maxsize,
 544                          const char *format, va_list ap);
 545 #endif
 546
 547 #ifdef __GLIBC_PREREQ
 548 #if __GLIBC_PREREQ(2, 1)
 549 #define HAVE_STRCHRNUL
 550 #define HAVE_MEMPCPY
 551 #endif
 552 #endif
 553
 554 #ifndef HAVE_STRCHRNUL
 555 #define strchrnul gitstrchrnul
 556 static inline char *gitstrchrnul(const char *s, int c)
 557 {
 558         while (*s && *s != c)
 559                 s++;
 560         return (char *)s;
 561 }
 562 #endif
 563
 564 #ifndef HAVE_MEMPCPY
 565 #define mempcpy gitmempcpy
 566 static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 567 {
 568         return (char *)memcpy(dest, src, n) + n;
 569 }
 570 #endif
 571
 572 #ifdef NO_INET_PTON
 573 int inet_pton(int af, const char *src, void *dst);
 574 #endif
 575
 576 #ifdef NO_INET_NTOP
 577 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 578 #endif
 579
 580 extern void release_pack_memory(size_t);
 581
 582 typedef void (*try_to_free_t)(size_t);
 583 extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 584
 585 #ifdef HAVE_ALLOCA_H
 586 # include <alloca.h>
 587 # define xalloca(size)      (alloca(size))
 588 # define xalloca_free(p)    do {} while (0)
 589 #else
 590 # define xalloca(size)      (xmalloc(size))
 591 # define xalloca_free(p)    (free(p))
 592 #endif
 593 extern char *xstrdup(const char *str);
 594 extern void *xmalloc(size_t size);
 595 extern void *xmallocz(size_t size);
 596 extern void *xmemdupz(const void *data, size_t len);
 597 extern char *xstrndup(const char *str, size_t len);
 598 extern void *xrealloc(void *ptr, size_t size);
 599 extern void *xcalloc(size_t nmemb, size_t size);
 600 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 601 extern ssize_t xread(int fd, void *buf, size_t len);
 602 extern ssize_t xwrite(int fd, const void *buf, size_t len);
 603 extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 604 extern int xdup(int fd);
 605 extern FILE *xfdopen(int fd, const char *mode);
 606 extern int xmkstemp(char *template);
 607 extern int xmkstemp_mode(char *template, int mode);
 608 extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 609 extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 610
 611 static inline size_t xsize_t(off_t len)
 612 {
 613         if (len > (size_t) len)
 614                 die("Cannot handle files this big");
 615         return (size_t)len;
 616 }
 617
 618 /* in ctype.c, for kwset users */
 619 extern const char tolower_trans_tbl[256];
 620
 621 /* Sane ctype - no locale, and works with signed chars */
 622 #undef isascii
 623 #undef isspace
 624 #undef isdigit
 625 #undef isalpha
 626 #undef isalnum
 627 #undef isprint
 628 #undef islower
 629 #undef isupper
 630 #undef tolower
 631 #undef toupper
 632 #undef iscntrl
 633 #undef ispunct
 634 #undef isxdigit
 635
 636 extern const unsigned char sane_ctype[256];
 637 #define GIT_SPACE 0x01
 638 #define GIT_DIGIT 0x02
 639 #define GIT_ALPHA 0x04
 640 #define GIT_GLOB_SPECIAL 0x08
 641 #define GIT_REGEX_SPECIAL 0x10
 642 #define GIT_PATHSPEC_MAGIC 0x20
 643 #define GIT_CNTRL 0x40
 644 #define GIT_PUNCT 0x80
 645 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 646 #define isascii(x) (((x) & ~0x7f) == 0)
 647 #define isspace(x) sane_istest(x,GIT_SPACE)
 648 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 649 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 650 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 651 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 652 #define islower(x) sane_iscase(x, 1)
 653 #define isupper(x) sane_iscase(x, 0)
 654 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 655 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 656 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 657 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 658                 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 659 #define isxdigit(x) (hexval_table[x] != -1)
 660 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 661 #define toupper(x) sane_case((unsigned char)(x), 0)
 662 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 663
 664 static inline int sane_case(int x, int high)
 665 {
 666         if (sane_istest(x, GIT_ALPHA))
 667                 x = (x & ~0x20) | high;
 668         return x;
 669 }
 670
 671 static inline int sane_iscase(int x, int is_lower)
 672 {
 673         if (!sane_istest(x, GIT_ALPHA))
 674                 return 0;
 675
 676         if (is_lower)
 677                 return (x & 0x20) != 0;
 678         else
 679                 return (x & 0x20) == 0;
 680 }
 681
 682 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 683 {
 684         unsigned long ul;
 685         char *p;
 686
 687         errno = 0;
 688         ul = strtoul(s, &p, base);
 689         if (errno || *p || p == s || (unsigned int) ul != ul)
 690                 return -1;
 691         *result = ul;
 692         return 0;
 693 }
 694
 695 static inline int strtol_i(char const *s, int base, int *result)
 696 {
 697         long ul;
 698         char *p;
 699
 700         errno = 0;
 701         ul = strtol(s, &p, base);
 702         if (errno || *p || p == s || (int) ul != ul)
 703                 return -1;
 704         *result = ul;
 705         return 0;
 706 }
 707
 708 #ifdef INTERNAL_QSORT
 709 void git_qsort(void *base, size_t nmemb, size_t size,
 710                int(*compar)(const void *, const void *));
 711 #define qsort git_qsort
 712 #endif
 713
 714 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 715 # define FORCE_DIR_SET_GID S_ISGID
 716 #else
 717 # define FORCE_DIR_SET_GID 0
 718 #endif
 719
 720 #ifdef NO_NSEC
 721 #undef USE_NSEC
 722 #define ST_CTIME_NSEC(st) 0
 723 #define ST_MTIME_NSEC(st) 0
 724 #else
 725 #ifdef USE_ST_TIMESPEC
 726 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 727 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 728 #else
 729 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 730 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 731 #endif
 732 #endif
 733
 734 #if defined(__GNUC__) && defined(__x86_64__)
 735 #include <emmintrin.h>
 736 /*
 737  * This is the system memory page size; it's used so that we can read
 738  * outside the bounds of an allocation without segfaulting.
 739  */
 740 #ifndef PAGE_SIZE
 741 #define PAGE_SIZE 4096
 742 #endif
 743 #endif
 744
 745 #ifdef UNRELIABLE_FSTAT
 746 #define fstat_is_reliable() 0
 747 #else
 748 #define fstat_is_reliable() 1
 749 #endif
 750
 751 #ifndef va_copy
 752 /*
 753  * Since an obvious implementation of va_list would be to make it a
 754  * pointer into the stack frame, a simple assignment will work on
 755  * many systems.  But let's try to be more portable.
 756  */
 757 #ifdef __va_copy
 758 #define va_copy(dst, src) __va_copy(dst, src)
 759 #else
 760 #define va_copy(dst, src) ((dst) = (src))
 761 #endif
 762 #endif
 763
 764 /*
 765  * Preserves errno, prints a message, but gives no warning for ENOENT.
 766  * Always returns the return value of unlink(2).
 767  */
 768 int unlink_or_warn(const char *path);
 769 /*
 770  * Likewise for rmdir(2).
 771  */
 772 int rmdir_or_warn(const char *path);
 773 /*
 774  * Calls the correct function out of {unlink,rmdir}_or_warn based on
 775  * the supplied file mode.
 776  */
 777 int remove_or_warn(unsigned int mode, const char *path);
 778
 779 /*
 780  * Call access(2), but warn for any error except "missing file"
 781  * (ENOENT or ENOTDIR).
 782  */
 783 #define ACCESS_EACCES_OK (1U << 0)
 784 int access_or_warn(const char *path, int mode, unsigned flag);
 785 int access_or_die(const char *path, int mode, unsigned flag);
 786
 787 /* Warn on an inaccessible file that ought to be accessible */
 788 void warn_on_inaccessible(const char *path);
 789
 790 /* Get the passwd entry for the UID of the current process. */
 791 struct passwd *xgetpwuid_self(void);
 792
 793 #ifdef GMTIME_UNRELIABLE_ERRORS
 794 struct tm *git_gmtime(const time_t *);
 795 struct tm *git_gmtime_r(const time_t *, struct tm *);
 796 #define gmtime git_gmtime
 797 #define gmtime_r git_gmtime_r
 798 #endif
 799
 800 #endif