Andrew's git - gitweb.git/blob

0347fe4bf105f5cd78c9b3582ebabf1b3722dad1
   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      !defined(__CYGWIN__)
  80#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
  81#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
  82#endif
  83#define _ALL_SOURCE 1
  84#define _GNU_SOURCE 1
  85#define _BSD_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 */
 163typedef long intptr_t;
 164typedef 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))
 188extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
 189#endif
 190
 191#ifdef NO_STRUCT_ITIMERVAL
 192struct 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
 206extern 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#define has_dos_drive_prefix(path) 0
 269#endif
 270
 271#ifndef offset_1st_component
 272#define offset_1st_component(path) (is_dir_sep((path)[0]))
 273#endif
 274
 275#ifndef is_dir_sep
 276#define is_dir_sep(c) ((c) == '/')
 277#endif
 278
 279#ifndef find_last_dir_sep
 280#define find_last_dir_sep(path) strrchr(path, '/')
 281#endif
 282
 283#if defined(__HP_cc) && (__HP_cc >= 61000)
 284#define NORETURN __attribute__((noreturn))
 285#define NORETURN_PTR
 286#elif defined(__GNUC__) && !defined(NO_NORETURN)
 287#define NORETURN __attribute__((__noreturn__))
 288#define NORETURN_PTR __attribute__((__noreturn__))
 289#elif defined(_MSC_VER)
 290#define NORETURN __declspec(noreturn)
 291#define NORETURN_PTR
 292#else
 293#define NORETURN
 294#define NORETURN_PTR
 295#ifndef __GNUC__
 296#ifndef __attribute__
 297#define __attribute__(x)
 298#endif
 299#endif
 300#endif
 301
 302/* The sentinel attribute is valid from gcc version 4.0 */
 303#if defined(__GNUC__) && (__GNUC__ >= 4)
 304#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 305#else
 306#define LAST_ARG_MUST_BE_NULL
 307#endif
 308
 309#include "compat/bswap.h"
 310
 311#include "wildmatch.h"
 312
 313/* General helper functions */
 314extern void vreportf(const char *prefix, const char *err, va_list params);
 315extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 316extern NORETURN void usage(const char *err);
 317extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 318extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 319extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 320extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 321extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 322
 323#ifndef NO_OPENSSL
 324#ifdef APPLE_COMMON_CRYPTO
 325#include "compat/apple-common-crypto.h"
 326#else
 327#include <openssl/evp.h>
 328#include <openssl/hmac.h>
 329#endif /* APPLE_COMMON_CRYPTO */
 330#include <openssl/x509v3.h>
 331#endif /* NO_OPENSSL */
 332
 333/*
 334 * Let callers be aware of the constant return value; this can help
 335 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 336 * because some compilers may not support variadic macros. Since we're only
 337 * trying to help gcc, anyway, it's OK; other compilers will fall back to
 338 * using the function as usual.
 339 */
 340#if defined(__GNUC__)
 341static inline int const_error(void)
 342{
 343        return -1;
 344}
 345#define error(...) (error(__VA_ARGS__), const_error())
 346#endif
 347
 348extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 349extern void set_error_routine(void (*routine)(const char *err, va_list params));
 350extern void set_die_is_recursing_routine(int (*routine)(void));
 351
 352extern int starts_with(const char *str, const char *prefix);
 353
 354/*
 355 * If the string "str" begins with the string found in "prefix", return 1.
 356 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 357 * the string right after the prefix).
 358 *
 359 * Otherwise, return 0 and leave "out" untouched.
 360 *
 361 * Examples:
 362 *
 363 *   [extract branch name, fail if not a branch]
 364 *   if (!skip_prefix(ref, "refs/heads/", &branch)
 365 *      return -1;
 366 *
 367 *   [skip prefix if present, otherwise use whole string]
 368 *   skip_prefix(name, "refs/heads/", &name);
 369 */
 370static inline int skip_prefix(const char *str, const char *prefix,
 371                              const char **out)
 372{
 373        do {
 374                if (!*prefix) {
 375                        *out = str;
 376                        return 1;
 377                }
 378        } while (*str++ == *prefix++);
 379        return 0;
 380}
 381
 382/*
 383 * If buf ends with suffix, return 1 and subtract the length of the suffix
 384 * from *len. Otherwise, return 0 and leave *len untouched.
 385 */
 386static inline int strip_suffix_mem(const char *buf, size_t *len,
 387                                   const char *suffix)
 388{
 389        size_t suflen = strlen(suffix);
 390        if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 391                return 0;
 392        *len -= suflen;
 393        return 1;
 394}
 395
 396/*
 397 * If str ends with suffix, return 1 and set *len to the size of the string
 398 * without the suffix. Otherwise, return 0 and set *len to the size of the
 399 * string.
 400 *
 401 * Note that we do _not_ NUL-terminate str to the new length.
 402 */
 403static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 404{
 405        *len = strlen(str);
 406        return strip_suffix_mem(str, len, suffix);
 407}
 408
 409static inline int ends_with(const char *str, const char *suffix)
 410{
 411        size_t len;
 412        return strip_suffix(str, suffix, &len);
 413}
 414
 415#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 416
 417#ifndef PROT_READ
 418#define PROT_READ 1
 419#define PROT_WRITE 2
 420#define MAP_PRIVATE 1
 421#endif
 422
 423#define mmap git_mmap
 424#define munmap git_munmap
 425extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 426extern int git_munmap(void *start, size_t length);
 427
 428#else /* NO_MMAP || USE_WIN32_MMAP */
 429
 430#include <sys/mman.h>
 431
 432#endif /* NO_MMAP || USE_WIN32_MMAP */
 433
 434#ifdef NO_MMAP
 435
 436/* This value must be multiple of (pagesize * 2) */
 437#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 438
 439#else /* NO_MMAP */
 440
 441/* This value must be multiple of (pagesize * 2) */
 442#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 443        (sizeof(void*) >= 8 \
 444                ?  1 * 1024 * 1024 * 1024 \
 445                : 32 * 1024 * 1024)
 446
 447#endif /* NO_MMAP */
 448
 449#ifndef MAP_FAILED
 450#define MAP_FAILED ((void *)-1)
 451#endif
 452
 453#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 454#define on_disk_bytes(st) ((st).st_size)
 455#else
 456#define on_disk_bytes(st) ((st).st_blocks * 512)
 457#endif
 458
 459#define DEFAULT_PACKED_GIT_LIMIT \
 460        ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 461
 462#ifdef NO_PREAD
 463#define pread git_pread
 464extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 465#endif
 466/*
 467 * Forward decl that will remind us if its twin in cache.h changes.
 468 * This function is used in compat/pread.c.  But we can't include
 469 * cache.h there.
 470 */
 471extern ssize_t read_in_full(int fd, void *buf, size_t count);
 472
 473#ifdef NO_SETENV
 474#define setenv gitsetenv
 475extern int gitsetenv(const char *, const char *, int);
 476#endif
 477
 478#ifdef NO_MKDTEMP
 479#define mkdtemp gitmkdtemp
 480extern char *gitmkdtemp(char *);
 481#endif
 482
 483#ifdef NO_MKSTEMPS
 484#define mkstemps gitmkstemps
 485extern int gitmkstemps(char *, int);
 486#endif
 487
 488#ifdef NO_UNSETENV
 489#define unsetenv gitunsetenv
 490extern void gitunsetenv(const char *);
 491#endif
 492
 493#ifdef NO_STRCASESTR
 494#define strcasestr gitstrcasestr
 495extern char *gitstrcasestr(const char *haystack, const char *needle);
 496#endif
 497
 498#ifdef NO_STRLCPY
 499#define strlcpy gitstrlcpy
 500extern size_t gitstrlcpy(char *, const char *, size_t);
 501#endif
 502
 503#ifdef NO_STRTOUMAX
 504#define strtoumax gitstrtoumax
 505extern uintmax_t gitstrtoumax(const char *, char **, int);
 506#define strtoimax gitstrtoimax
 507extern intmax_t gitstrtoimax(const char *, char **, int);
 508#endif
 509
 510#ifdef NO_HSTRERROR
 511#define hstrerror githstrerror
 512extern const char *githstrerror(int herror);
 513#endif
 514
 515#ifdef NO_MEMMEM
 516#define memmem gitmemmem
 517void *gitmemmem(const void *haystack, size_t haystacklen,
 518                const void *needle, size_t needlelen);
 519#endif
 520
 521#ifdef NO_GETPAGESIZE
 522#define getpagesize() sysconf(_SC_PAGESIZE)
 523#endif
 524
 525#ifdef FREAD_READS_DIRECTORIES
 526#ifdef fopen
 527#undef fopen
 528#endif
 529#define fopen(a,b) git_fopen(a,b)
 530extern FILE *git_fopen(const char*, const char*);
 531#endif
 532
 533#ifdef SNPRINTF_RETURNS_BOGUS
 534#ifdef snprintf
 535#undef snprintf
 536#endif
 537#define snprintf git_snprintf
 538extern int git_snprintf(char *str, size_t maxsize,
 539                        const char *format, ...);
 540#ifdef vsnprintf
 541#undef vsnprintf
 542#endif
 543#define vsnprintf git_vsnprintf
 544extern int git_vsnprintf(char *str, size_t maxsize,
 545                         const char *format, va_list ap);
 546#endif
 547
 548#ifdef __GLIBC_PREREQ
 549#if __GLIBC_PREREQ(2, 1)
 550#define HAVE_STRCHRNUL
 551#define HAVE_MEMPCPY
 552#endif
 553#endif
 554
 555#ifndef HAVE_STRCHRNUL
 556#define strchrnul gitstrchrnul
 557static inline char *gitstrchrnul(const char *s, int c)
 558{
 559        while (*s && *s != c)
 560                s++;
 561        return (char *)s;
 562}
 563#endif
 564
 565#ifndef HAVE_MEMPCPY
 566#define mempcpy gitmempcpy
 567static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 568{
 569        return (char *)memcpy(dest, src, n) + n;
 570}
 571#endif
 572
 573#ifdef NO_INET_PTON
 574int inet_pton(int af, const char *src, void *dst);
 575#endif
 576
 577#ifdef NO_INET_NTOP
 578const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 579#endif
 580
 581extern void release_pack_memory(size_t);
 582
 583typedef void (*try_to_free_t)(size_t);
 584extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 585
 586#ifdef HAVE_ALLOCA_H
 587# include <alloca.h>
 588# define xalloca(size)      (alloca(size))
 589# define xalloca_free(p)    do {} while (0)
 590#else
 591# define xalloca(size)      (xmalloc(size))
 592# define xalloca_free(p)    (free(p))
 593#endif
 594extern char *xstrdup(const char *str);
 595extern void *xmalloc(size_t size);
 596extern void *xmallocz(size_t size);
 597extern void *xmemdupz(const void *data, size_t len);
 598extern char *xstrndup(const char *str, size_t len);
 599extern void *xrealloc(void *ptr, size_t size);
 600extern void *xcalloc(size_t nmemb, size_t size);
 601extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 602extern ssize_t xread(int fd, void *buf, size_t len);
 603extern ssize_t xwrite(int fd, const void *buf, size_t len);
 604extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 605extern int xdup(int fd);
 606extern FILE *xfdopen(int fd, const char *mode);
 607extern int xmkstemp(char *template);
 608extern int xmkstemp_mode(char *template, int mode);
 609extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 610extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 611
 612static inline size_t xsize_t(off_t len)
 613{
 614        if (len > (size_t) len)
 615                die("Cannot handle files this big");
 616        return (size_t)len;
 617}
 618
 619/* in ctype.c, for kwset users */
 620extern const char tolower_trans_tbl[256];
 621
 622/* Sane ctype - no locale, and works with signed chars */
 623#undef isascii
 624#undef isspace
 625#undef isdigit
 626#undef isalpha
 627#undef isalnum
 628#undef isprint
 629#undef islower
 630#undef isupper
 631#undef tolower
 632#undef toupper
 633#undef iscntrl
 634#undef ispunct
 635#undef isxdigit
 636
 637extern const unsigned char sane_ctype[256];
 638#define GIT_SPACE 0x01
 639#define GIT_DIGIT 0x02
 640#define GIT_ALPHA 0x04
 641#define GIT_GLOB_SPECIAL 0x08
 642#define GIT_REGEX_SPECIAL 0x10
 643#define GIT_PATHSPEC_MAGIC 0x20
 644#define GIT_CNTRL 0x40
 645#define GIT_PUNCT 0x80
 646#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 647#define isascii(x) (((x) & ~0x7f) == 0)
 648#define isspace(x) sane_istest(x,GIT_SPACE)
 649#define isdigit(x) sane_istest(x,GIT_DIGIT)
 650#define isalpha(x) sane_istest(x,GIT_ALPHA)
 651#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 652#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 653#define islower(x) sane_iscase(x, 1)
 654#define isupper(x) sane_iscase(x, 0)
 655#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 656#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 657#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 658#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 659                GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 660#define isxdigit(x) (hexval_table[x] != -1)
 661#define tolower(x) sane_case((unsigned char)(x), 0x20)
 662#define toupper(x) sane_case((unsigned char)(x), 0)
 663#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 664
 665static inline int sane_case(int x, int high)
 666{
 667        if (sane_istest(x, GIT_ALPHA))
 668                x = (x & ~0x20) | high;
 669        return x;
 670}
 671
 672static inline int sane_iscase(int x, int is_lower)
 673{
 674        if (!sane_istest(x, GIT_ALPHA))
 675                return 0;
 676
 677        if (is_lower)
 678                return (x & 0x20) != 0;
 679        else
 680                return (x & 0x20) == 0;
 681}
 682
 683static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 684{
 685        unsigned long ul;
 686        char *p;
 687
 688        errno = 0;
 689        ul = strtoul(s, &p, base);
 690        if (errno || *p || p == s || (unsigned int) ul != ul)
 691                return -1;
 692        *result = ul;
 693        return 0;
 694}
 695
 696static inline int strtol_i(char const *s, int base, int *result)
 697{
 698        long ul;
 699        char *p;
 700
 701        errno = 0;
 702        ul = strtol(s, &p, base);
 703        if (errno || *p || p == s || (int) ul != ul)
 704                return -1;
 705        *result = ul;
 706        return 0;
 707}
 708
 709#ifdef INTERNAL_QSORT
 710void git_qsort(void *base, size_t nmemb, size_t size,
 711               int(*compar)(const void *, const void *));
 712#define qsort git_qsort
 713#endif
 714
 715#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 716# define FORCE_DIR_SET_GID S_ISGID
 717#else
 718# define FORCE_DIR_SET_GID 0
 719#endif
 720
 721#ifdef NO_NSEC
 722#undef USE_NSEC
 723#define ST_CTIME_NSEC(st) 0
 724#define ST_MTIME_NSEC(st) 0
 725#else
 726#ifdef USE_ST_TIMESPEC
 727#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 728#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 729#else
 730#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 731#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 732#endif
 733#endif
 734
 735#ifdef UNRELIABLE_FSTAT
 736#define fstat_is_reliable() 0
 737#else
 738#define fstat_is_reliable() 1
 739#endif
 740
 741#ifndef va_copy
 742/*
 743 * Since an obvious implementation of va_list would be to make it a
 744 * pointer into the stack frame, a simple assignment will work on
 745 * many systems.  But let's try to be more portable.
 746 */
 747#ifdef __va_copy
 748#define va_copy(dst, src) __va_copy(dst, src)
 749#else
 750#define va_copy(dst, src) ((dst) = (src))
 751#endif
 752#endif
 753
 754#if defined(__GNUC__) || (_MSC_VER >= 1400)
 755#define HAVE_VARIADIC_MACROS 1
 756#endif
 757
 758/*
 759 * Preserves errno, prints a message, but gives no warning for ENOENT.
 760 * Always returns the return value of unlink(2).
 761 */
 762int unlink_or_warn(const char *path);
 763/*
 764 * Likewise for rmdir(2).
 765 */
 766int rmdir_or_warn(const char *path);
 767/*
 768 * Calls the correct function out of {unlink,rmdir}_or_warn based on
 769 * the supplied file mode.
 770 */
 771int remove_or_warn(unsigned int mode, const char *path);
 772
 773/*
 774 * Call access(2), but warn for any error except "missing file"
 775 * (ENOENT or ENOTDIR).
 776 */
 777#define ACCESS_EACCES_OK (1U << 0)
 778int access_or_warn(const char *path, int mode, unsigned flag);
 779int access_or_die(const char *path, int mode, unsigned flag);
 780
 781/* Warn on an inaccessible file that ought to be accessible */
 782void warn_on_inaccessible(const char *path);
 783
 784/* Get the passwd entry for the UID of the current process. */
 785struct passwd *xgetpwuid_self(void);
 786
 787#ifdef GMTIME_UNRELIABLE_ERRORS
 788struct tm *git_gmtime(const time_t *);
 789struct tm *git_gmtime_r(const time_t *, struct tm *);
 790#define gmtime git_gmtime
 791#define gmtime_r git_gmtime_r
 792#endif
 793
 794#endif