Andrew's git - gitweb.git/blob

433b8f2a1d5bc061c143d17fa39653a07768bbbe
   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 */
 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#define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
 215#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_6
 216#include <openssl/ssl.h>
 217#include <openssl/err.h>
 218#undef MAC_OS_X_VERSION_MIN_REQUIRED
 219#undef __AVAILABILITY_MACROS_USES_AVAILABILITY
 220#endif
 221
 222/* On most systems <netdb.h> would have given us this, but
 223 * not on some systems (e.g. z/OS).
 224 */
 225#ifndef NI_MAXHOST
 226#define NI_MAXHOST 1025
 227#endif
 228
 229#ifndef NI_MAXSERV
 230#define NI_MAXSERV 32
 231#endif
 232
 233/* On most systems <limits.h> would have given us this, but
 234 * not on some systems (e.g. GNU/Hurd).
 235 */
 236#ifndef PATH_MAX
 237#define PATH_MAX 4096
 238#endif
 239
 240#ifndef PRIuMAX
 241#define PRIuMAX "llu"
 242#endif
 243
 244#ifndef PRIu32
 245#define PRIu32 "u"
 246#endif
 247
 248#ifndef PRIx32
 249#define PRIx32 "x"
 250#endif
 251
 252#ifndef PRIo32
 253#define PRIo32 "o"
 254#endif
 255
 256#ifndef PATH_SEP
 257#define PATH_SEP ':'
 258#endif
 259
 260#ifdef HAVE_PATHS_H
 261#include <paths.h>
 262#endif
 263#ifndef _PATH_DEFPATH
 264#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
 265#endif
 266
 267#ifndef STRIP_EXTENSION
 268#define STRIP_EXTENSION ""
 269#endif
 270
 271#ifndef has_dos_drive_prefix
 272static inline int git_has_dos_drive_prefix(const char *path)
 273{
 274        return 0;
 275}
 276#define has_dos_drive_prefix git_has_dos_drive_prefix
 277#endif
 278
 279#ifndef is_dir_sep
 280static inline int git_is_dir_sep(int c)
 281{
 282        return c == '/';
 283}
 284#define is_dir_sep git_is_dir_sep
 285#endif
 286
 287#ifndef offset_1st_component
 288static inline int git_offset_1st_component(const char *path)
 289{
 290        return is_dir_sep(path[0]);
 291}
 292#define offset_1st_component git_offset_1st_component
 293#endif
 294
 295#ifndef find_last_dir_sep
 296static inline char *git_find_last_dir_sep(const char *path)
 297{
 298        return strrchr(path, '/');
 299}
 300#define find_last_dir_sep git_find_last_dir_sep
 301#endif
 302
 303#if defined(__HP_cc) && (__HP_cc >= 61000)
 304#define NORETURN __attribute__((noreturn))
 305#define NORETURN_PTR
 306#elif defined(__GNUC__) && !defined(NO_NORETURN)
 307#define NORETURN __attribute__((__noreturn__))
 308#define NORETURN_PTR __attribute__((__noreturn__))
 309#elif defined(_MSC_VER)
 310#define NORETURN __declspec(noreturn)
 311#define NORETURN_PTR
 312#else
 313#define NORETURN
 314#define NORETURN_PTR
 315#ifndef __GNUC__
 316#ifndef __attribute__
 317#define __attribute__(x)
 318#endif
 319#endif
 320#endif
 321
 322/* The sentinel attribute is valid from gcc version 4.0 */
 323#if defined(__GNUC__) && (__GNUC__ >= 4)
 324#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 325#else
 326#define LAST_ARG_MUST_BE_NULL
 327#endif
 328
 329#include "compat/bswap.h"
 330
 331#include "wildmatch.h"
 332
 333struct strbuf;
 334
 335/* General helper functions */
 336extern void vreportf(const char *prefix, const char *err, va_list params);
 337extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 338extern NORETURN void usage(const char *err);
 339extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 340extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 341extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 342extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 343extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 344
 345#ifndef NO_OPENSSL
 346#ifdef APPLE_COMMON_CRYPTO
 347#include "compat/apple-common-crypto.h"
 348#else
 349#include <openssl/evp.h>
 350#include <openssl/hmac.h>
 351#endif /* APPLE_COMMON_CRYPTO */
 352#include <openssl/x509v3.h>
 353#endif /* NO_OPENSSL */
 354
 355/*
 356 * Let callers be aware of the constant return value; this can help
 357 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 358 * because some compilers may not support variadic macros. Since we're only
 359 * trying to help gcc, anyway, it's OK; other compilers will fall back to
 360 * using the function as usual.
 361 */
 362#if defined(__GNUC__)
 363static inline int const_error(void)
 364{
 365        return -1;
 366}
 367#define error(...) (error(__VA_ARGS__), const_error())
 368#endif
 369
 370extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 371extern void set_error_routine(void (*routine)(const char *err, va_list params));
 372extern void set_die_is_recursing_routine(int (*routine)(void));
 373
 374extern int starts_with(const char *str, const char *prefix);
 375
 376/*
 377 * If the string "str" begins with the string found in "prefix", return 1.
 378 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 379 * the string right after the prefix).
 380 *
 381 * Otherwise, return 0 and leave "out" untouched.
 382 *
 383 * Examples:
 384 *
 385 *   [extract branch name, fail if not a branch]
 386 *   if (!skip_prefix(ref, "refs/heads/", &branch)
 387 *      return -1;
 388 *
 389 *   [skip prefix if present, otherwise use whole string]
 390 *   skip_prefix(name, "refs/heads/", &name);
 391 */
 392static inline int skip_prefix(const char *str, const char *prefix,
 393                              const char **out)
 394{
 395        do {
 396                if (!*prefix) {
 397                        *out = str;
 398                        return 1;
 399                }
 400        } while (*str++ == *prefix++);
 401        return 0;
 402}
 403
 404/*
 405 * If buf ends with suffix, return 1 and subtract the length of the suffix
 406 * from *len. Otherwise, return 0 and leave *len untouched.
 407 */
 408static inline int strip_suffix_mem(const char *buf, size_t *len,
 409                                   const char *suffix)
 410{
 411        size_t suflen = strlen(suffix);
 412        if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 413                return 0;
 414        *len -= suflen;
 415        return 1;
 416}
 417
 418/*
 419 * If str ends with suffix, return 1 and set *len to the size of the string
 420 * without the suffix. Otherwise, return 0 and set *len to the size of the
 421 * string.
 422 *
 423 * Note that we do _not_ NUL-terminate str to the new length.
 424 */
 425static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 426{
 427        *len = strlen(str);
 428        return strip_suffix_mem(str, len, suffix);
 429}
 430
 431static inline int ends_with(const char *str, const char *suffix)
 432{
 433        size_t len;
 434        return strip_suffix(str, suffix, &len);
 435}
 436
 437#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 438
 439#ifndef PROT_READ
 440#define PROT_READ 1
 441#define PROT_WRITE 2
 442#define MAP_PRIVATE 1
 443#endif
 444
 445#define mmap git_mmap
 446#define munmap git_munmap
 447extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 448extern int git_munmap(void *start, size_t length);
 449
 450#else /* NO_MMAP || USE_WIN32_MMAP */
 451
 452#include <sys/mman.h>
 453
 454#endif /* NO_MMAP || USE_WIN32_MMAP */
 455
 456#ifdef NO_MMAP
 457
 458/* This value must be multiple of (pagesize * 2) */
 459#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 460
 461#else /* NO_MMAP */
 462
 463/* This value must be multiple of (pagesize * 2) */
 464#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 465        (sizeof(void*) >= 8 \
 466                ?  1 * 1024 * 1024 * 1024 \
 467                : 32 * 1024 * 1024)
 468
 469#endif /* NO_MMAP */
 470
 471#ifndef MAP_FAILED
 472#define MAP_FAILED ((void *)-1)
 473#endif
 474
 475#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 476#define on_disk_bytes(st) ((st).st_size)
 477#else
 478#define on_disk_bytes(st) ((st).st_blocks * 512)
 479#endif
 480
 481#define DEFAULT_PACKED_GIT_LIMIT \
 482        ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 483
 484#ifdef NO_PREAD
 485#define pread git_pread
 486extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 487#endif
 488/*
 489 * Forward decl that will remind us if its twin in cache.h changes.
 490 * This function is used in compat/pread.c.  But we can't include
 491 * cache.h there.
 492 */
 493extern ssize_t read_in_full(int fd, void *buf, size_t count);
 494
 495#ifdef NO_SETENV
 496#define setenv gitsetenv
 497extern int gitsetenv(const char *, const char *, int);
 498#endif
 499
 500#ifdef NO_MKDTEMP
 501#define mkdtemp gitmkdtemp
 502extern char *gitmkdtemp(char *);
 503#endif
 504
 505#ifdef NO_MKSTEMPS
 506#define mkstemps gitmkstemps
 507extern int gitmkstemps(char *, int);
 508#endif
 509
 510#ifdef NO_UNSETENV
 511#define unsetenv gitunsetenv
 512extern void gitunsetenv(const char *);
 513#endif
 514
 515#ifdef NO_STRCASESTR
 516#define strcasestr gitstrcasestr
 517extern char *gitstrcasestr(const char *haystack, const char *needle);
 518#endif
 519
 520#ifdef NO_STRLCPY
 521#define strlcpy gitstrlcpy
 522extern size_t gitstrlcpy(char *, const char *, size_t);
 523#endif
 524
 525#ifdef NO_STRTOUMAX
 526#define strtoumax gitstrtoumax
 527extern uintmax_t gitstrtoumax(const char *, char **, int);
 528#define strtoimax gitstrtoimax
 529extern intmax_t gitstrtoimax(const char *, char **, int);
 530#endif
 531
 532#ifdef NO_HSTRERROR
 533#define hstrerror githstrerror
 534extern const char *githstrerror(int herror);
 535#endif
 536
 537#ifdef NO_MEMMEM
 538#define memmem gitmemmem
 539void *gitmemmem(const void *haystack, size_t haystacklen,
 540                const void *needle, size_t needlelen);
 541#endif
 542
 543#ifdef NO_GETPAGESIZE
 544#define getpagesize() sysconf(_SC_PAGESIZE)
 545#endif
 546
 547#ifdef FREAD_READS_DIRECTORIES
 548#ifdef fopen
 549#undef fopen
 550#endif
 551#define fopen(a,b) git_fopen(a,b)
 552extern FILE *git_fopen(const char*, const char*);
 553#endif
 554
 555#ifdef SNPRINTF_RETURNS_BOGUS
 556#ifdef snprintf
 557#undef snprintf
 558#endif
 559#define snprintf git_snprintf
 560extern int git_snprintf(char *str, size_t maxsize,
 561                        const char *format, ...);
 562#ifdef vsnprintf
 563#undef vsnprintf
 564#endif
 565#define vsnprintf git_vsnprintf
 566extern int git_vsnprintf(char *str, size_t maxsize,
 567                         const char *format, va_list ap);
 568#endif
 569
 570#ifdef __GLIBC_PREREQ
 571#if __GLIBC_PREREQ(2, 1)
 572#define HAVE_STRCHRNUL
 573#define HAVE_MEMPCPY
 574#endif
 575#endif
 576
 577#ifndef HAVE_STRCHRNUL
 578#define strchrnul gitstrchrnul
 579static inline char *gitstrchrnul(const char *s, int c)
 580{
 581        while (*s && *s != c)
 582                s++;
 583        return (char *)s;
 584}
 585#endif
 586
 587#ifndef HAVE_MEMPCPY
 588#define mempcpy gitmempcpy
 589static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 590{
 591        return (char *)memcpy(dest, src, n) + n;
 592}
 593#endif
 594
 595#ifdef NO_INET_PTON
 596int inet_pton(int af, const char *src, void *dst);
 597#endif
 598
 599#ifdef NO_INET_NTOP
 600const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 601#endif
 602
 603#ifdef NO_PTHREADS
 604#define atexit git_atexit
 605extern int git_atexit(void (*handler)(void));
 606#endif
 607
 608extern void release_pack_memory(size_t);
 609
 610typedef void (*try_to_free_t)(size_t);
 611extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 612
 613#ifdef HAVE_ALLOCA_H
 614# include <alloca.h>
 615# define xalloca(size)      (alloca(size))
 616# define xalloca_free(p)    do {} while (0)
 617#else
 618# define xalloca(size)      (xmalloc(size))
 619# define xalloca_free(p)    (free(p))
 620#endif
 621extern char *xstrdup(const char *str);
 622extern void *xmalloc(size_t size);
 623extern void *xmallocz(size_t size);
 624extern void *xmallocz_gently(size_t size);
 625extern void *xmemdupz(const void *data, size_t len);
 626extern char *xstrndup(const char *str, size_t len);
 627extern void *xrealloc(void *ptr, size_t size);
 628extern void *xcalloc(size_t nmemb, size_t size);
 629extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 630extern ssize_t xread(int fd, void *buf, size_t len);
 631extern ssize_t xwrite(int fd, const void *buf, size_t len);
 632extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 633extern int xdup(int fd);
 634extern FILE *xfdopen(int fd, const char *mode);
 635extern int xmkstemp(char *template);
 636extern int xmkstemp_mode(char *template, int mode);
 637extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 638extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 639extern char *xgetcwd(void);
 640
 641#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
 642
 643static inline size_t xsize_t(off_t len)
 644{
 645        if (len > (size_t) len)
 646                die("Cannot handle files this big");
 647        return (size_t)len;
 648}
 649
 650/* in ctype.c, for kwset users */
 651extern const char tolower_trans_tbl[256];
 652
 653/* Sane ctype - no locale, and works with signed chars */
 654#undef isascii
 655#undef isspace
 656#undef isdigit
 657#undef isalpha
 658#undef isalnum
 659#undef isprint
 660#undef islower
 661#undef isupper
 662#undef tolower
 663#undef toupper
 664#undef iscntrl
 665#undef ispunct
 666#undef isxdigit
 667
 668extern const unsigned char sane_ctype[256];
 669#define GIT_SPACE 0x01
 670#define GIT_DIGIT 0x02
 671#define GIT_ALPHA 0x04
 672#define GIT_GLOB_SPECIAL 0x08
 673#define GIT_REGEX_SPECIAL 0x10
 674#define GIT_PATHSPEC_MAGIC 0x20
 675#define GIT_CNTRL 0x40
 676#define GIT_PUNCT 0x80
 677#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 678#define isascii(x) (((x) & ~0x7f) == 0)
 679#define isspace(x) sane_istest(x,GIT_SPACE)
 680#define isdigit(x) sane_istest(x,GIT_DIGIT)
 681#define isalpha(x) sane_istest(x,GIT_ALPHA)
 682#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 683#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 684#define islower(x) sane_iscase(x, 1)
 685#define isupper(x) sane_iscase(x, 0)
 686#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 687#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 688#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 689#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 690                GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 691#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
 692#define tolower(x) sane_case((unsigned char)(x), 0x20)
 693#define toupper(x) sane_case((unsigned char)(x), 0)
 694#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 695
 696static inline int sane_case(int x, int high)
 697{
 698        if (sane_istest(x, GIT_ALPHA))
 699                x = (x & ~0x20) | high;
 700        return x;
 701}
 702
 703static inline int sane_iscase(int x, int is_lower)
 704{
 705        if (!sane_istest(x, GIT_ALPHA))
 706                return 0;
 707
 708        if (is_lower)
 709                return (x & 0x20) != 0;
 710        else
 711                return (x & 0x20) == 0;
 712}
 713
 714static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 715{
 716        unsigned long ul;
 717        char *p;
 718
 719        errno = 0;
 720        ul = strtoul(s, &p, base);
 721        if (errno || *p || p == s || (unsigned int) ul != ul)
 722                return -1;
 723        *result = ul;
 724        return 0;
 725}
 726
 727static inline int strtol_i(char const *s, int base, int *result)
 728{
 729        long ul;
 730        char *p;
 731
 732        errno = 0;
 733        ul = strtol(s, &p, base);
 734        if (errno || *p || p == s || (int) ul != ul)
 735                return -1;
 736        *result = ul;
 737        return 0;
 738}
 739
 740#ifdef INTERNAL_QSORT
 741void git_qsort(void *base, size_t nmemb, size_t size,
 742               int(*compar)(const void *, const void *));
 743#define qsort git_qsort
 744#endif
 745
 746#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 747# define FORCE_DIR_SET_GID S_ISGID
 748#else
 749# define FORCE_DIR_SET_GID 0
 750#endif
 751
 752#ifdef NO_NSEC
 753#undef USE_NSEC
 754#define ST_CTIME_NSEC(st) 0
 755#define ST_MTIME_NSEC(st) 0
 756#else
 757#ifdef USE_ST_TIMESPEC
 758#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 759#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 760#else
 761#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 762#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 763#endif
 764#endif
 765
 766#ifdef UNRELIABLE_FSTAT
 767#define fstat_is_reliable() 0
 768#else
 769#define fstat_is_reliable() 1
 770#endif
 771
 772#ifndef va_copy
 773/*
 774 * Since an obvious implementation of va_list would be to make it a
 775 * pointer into the stack frame, a simple assignment will work on
 776 * many systems.  But let's try to be more portable.
 777 */
 778#ifdef __va_copy
 779#define va_copy(dst, src) __va_copy(dst, src)
 780#else
 781#define va_copy(dst, src) ((dst) = (src))
 782#endif
 783#endif
 784
 785#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
 786#define HAVE_VARIADIC_MACROS 1
 787#endif
 788
 789/*
 790 * Preserves errno, prints a message, but gives no warning for ENOENT.
 791 * Returns 0 on success, which includes trying to unlink an object that does
 792 * not exist.
 793 */
 794int unlink_or_warn(const char *path);
 795 /*
 796  * Tries to unlink file.  Returns 0 if unlink succeeded
 797  * or the file already didn't exist.  Returns -1 and
 798  * appends a message to err suitable for
 799  * 'error("%s", err->buf)' on error.
 800  */
 801int unlink_or_msg(const char *file, struct strbuf *err);
 802/*
 803 * Preserves errno, prints a message, but gives no warning for ENOENT.
 804 * Returns 0 on success, which includes trying to remove a directory that does
 805 * not exist.
 806 */
 807int rmdir_or_warn(const char *path);
 808/*
 809 * Calls the correct function out of {unlink,rmdir}_or_warn based on
 810 * the supplied file mode.
 811 */
 812int remove_or_warn(unsigned int mode, const char *path);
 813
 814/*
 815 * Call access(2), but warn for any error except "missing file"
 816 * (ENOENT or ENOTDIR).
 817 */
 818#define ACCESS_EACCES_OK (1U << 0)
 819int access_or_warn(const char *path, int mode, unsigned flag);
 820int access_or_die(const char *path, int mode, unsigned flag);
 821
 822/* Warn on an inaccessible file that ought to be accessible */
 823void warn_on_inaccessible(const char *path);
 824
 825/* Get the passwd entry for the UID of the current process. */
 826struct passwd *xgetpwuid_self(void);
 827
 828#ifdef GMTIME_UNRELIABLE_ERRORS
 829struct tm *git_gmtime(const time_t *);
 830struct tm *git_gmtime_r(const time_t *, struct tm *);
 831#define gmtime git_gmtime
 832#define gmtime_r git_gmtime_r
 833#endif
 834
 835#endif