Andrew's git - gitweb.git/blob

   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#ifdef __APPLE__
 215#define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
 216#include <AvailabilityMacros.h>
 217#undef DEPRECATED_ATTRIBUTE
 218#define DEPRECATED_ATTRIBUTE
 219#undef __AVAILABILITY_MACROS_USES_AVAILABILITY
 220#endif
 221#include <openssl/ssl.h>
 222#include <openssl/err.h>
 223#endif
 224
 225/* On most systems <netdb.h> would have given us this, but
 226 * not on some systems (e.g. z/OS).
 227 */
 228#ifndef NI_MAXHOST
 229#define NI_MAXHOST 1025
 230#endif
 231
 232#ifndef NI_MAXSERV
 233#define NI_MAXSERV 32
 234#endif
 235
 236/* On most systems <limits.h> would have given us this, but
 237 * not on some systems (e.g. GNU/Hurd).
 238 */
 239#ifndef PATH_MAX
 240#define PATH_MAX 4096
 241#endif
 242
 243#ifndef PRIuMAX
 244#define PRIuMAX "llu"
 245#endif
 246
 247#ifndef PRIu32
 248#define PRIu32 "u"
 249#endif
 250
 251#ifndef PRIx32
 252#define PRIx32 "x"
 253#endif
 254
 255#ifndef PRIo32
 256#define PRIo32 "o"
 257#endif
 258
 259#ifndef PATH_SEP
 260#define PATH_SEP ':'
 261#endif
 262
 263#ifdef HAVE_PATHS_H
 264#include <paths.h>
 265#endif
 266#ifndef _PATH_DEFPATH
 267#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
 268#endif
 269
 270#ifndef STRIP_EXTENSION
 271#define STRIP_EXTENSION ""
 272#endif
 273
 274#ifndef has_dos_drive_prefix
 275static inline int git_has_dos_drive_prefix(const char *path)
 276{
 277        return 0;
 278}
 279#define has_dos_drive_prefix git_has_dos_drive_prefix
 280#endif
 281
 282#ifndef is_dir_sep
 283static inline int git_is_dir_sep(int c)
 284{
 285        return c == '/';
 286}
 287#define is_dir_sep git_is_dir_sep
 288#endif
 289
 290#ifndef offset_1st_component
 291static inline int git_offset_1st_component(const char *path)
 292{
 293        return is_dir_sep(path[0]);
 294}
 295#define offset_1st_component git_offset_1st_component
 296#endif
 297
 298#ifndef find_last_dir_sep
 299static inline char *git_find_last_dir_sep(const char *path)
 300{
 301        return strrchr(path, '/');
 302}
 303#define find_last_dir_sep git_find_last_dir_sep
 304#endif
 305
 306#if defined(__HP_cc) && (__HP_cc >= 61000)
 307#define NORETURN __attribute__((noreturn))
 308#define NORETURN_PTR
 309#elif defined(__GNUC__) && !defined(NO_NORETURN)
 310#define NORETURN __attribute__((__noreturn__))
 311#define NORETURN_PTR __attribute__((__noreturn__))
 312#elif defined(_MSC_VER)
 313#define NORETURN __declspec(noreturn)
 314#define NORETURN_PTR
 315#else
 316#define NORETURN
 317#define NORETURN_PTR
 318#ifndef __GNUC__
 319#ifndef __attribute__
 320#define __attribute__(x)
 321#endif
 322#endif
 323#endif
 324
 325/* The sentinel attribute is valid from gcc version 4.0 */
 326#if defined(__GNUC__) && (__GNUC__ >= 4)
 327#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 328#else
 329#define LAST_ARG_MUST_BE_NULL
 330#endif
 331
 332#include "compat/bswap.h"
 333
 334#include "wildmatch.h"
 335
 336struct strbuf;
 337
 338/* General helper functions */
 339extern void vreportf(const char *prefix, const char *err, va_list params);
 340extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 341extern NORETURN void usage(const char *err);
 342extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 343extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 344extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 345extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 346extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 347
 348#ifndef NO_OPENSSL
 349#ifdef APPLE_COMMON_CRYPTO
 350#include "compat/apple-common-crypto.h"
 351#else
 352#include <openssl/evp.h>
 353#include <openssl/hmac.h>
 354#endif /* APPLE_COMMON_CRYPTO */
 355#include <openssl/x509v3.h>
 356#endif /* NO_OPENSSL */
 357
 358/*
 359 * Let callers be aware of the constant return value; this can help
 360 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 361 * because some compilers may not support variadic macros. Since we're only
 362 * trying to help gcc, anyway, it's OK; other compilers will fall back to
 363 * using the function as usual.
 364 */
 365#if defined(__GNUC__)
 366static inline int const_error(void)
 367{
 368        return -1;
 369}
 370#define error(...) (error(__VA_ARGS__), const_error())
 371#endif
 372
 373extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 374extern void set_error_routine(void (*routine)(const char *err, va_list params));
 375extern void set_die_is_recursing_routine(int (*routine)(void));
 376
 377extern int starts_with(const char *str, const char *prefix);
 378
 379/*
 380 * If the string "str" begins with the string found in "prefix", return 1.
 381 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 382 * the string right after the prefix).
 383 *
 384 * Otherwise, return 0 and leave "out" untouched.
 385 *
 386 * Examples:
 387 *
 388 *   [extract branch name, fail if not a branch]
 389 *   if (!skip_prefix(ref, "refs/heads/", &branch)
 390 *      return -1;
 391 *
 392 *   [skip prefix if present, otherwise use whole string]
 393 *   skip_prefix(name, "refs/heads/", &name);
 394 */
 395static inline int skip_prefix(const char *str, const char *prefix,
 396                              const char **out)
 397{
 398        do {
 399                if (!*prefix) {
 400                        *out = str;
 401                        return 1;
 402                }
 403        } while (*str++ == *prefix++);
 404        return 0;
 405}
 406
 407/*
 408 * If buf ends with suffix, return 1 and subtract the length of the suffix
 409 * from *len. Otherwise, return 0 and leave *len untouched.
 410 */
 411static inline int strip_suffix_mem(const char *buf, size_t *len,
 412                                   const char *suffix)
 413{
 414        size_t suflen = strlen(suffix);
 415        if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 416                return 0;
 417        *len -= suflen;
 418        return 1;
 419}
 420
 421/*
 422 * If str ends with suffix, return 1 and set *len to the size of the string
 423 * without the suffix. Otherwise, return 0 and set *len to the size of the
 424 * string.
 425 *
 426 * Note that we do _not_ NUL-terminate str to the new length.
 427 */
 428static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 429{
 430        *len = strlen(str);
 431        return strip_suffix_mem(str, len, suffix);
 432}
 433
 434static inline int ends_with(const char *str, const char *suffix)
 435{
 436        size_t len;
 437        return strip_suffix(str, suffix, &len);
 438}
 439
 440#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 441
 442#ifndef PROT_READ
 443#define PROT_READ 1
 444#define PROT_WRITE 2
 445#define MAP_PRIVATE 1
 446#endif
 447
 448#define mmap git_mmap
 449#define munmap git_munmap
 450extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 451extern int git_munmap(void *start, size_t length);
 452
 453#else /* NO_MMAP || USE_WIN32_MMAP */
 454
 455#include <sys/mman.h>
 456
 457#endif /* NO_MMAP || USE_WIN32_MMAP */
 458
 459#ifdef NO_MMAP
 460
 461/* This value must be multiple of (pagesize * 2) */
 462#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 463
 464#else /* NO_MMAP */
 465
 466/* This value must be multiple of (pagesize * 2) */
 467#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 468        (sizeof(void*) >= 8 \
 469                ?  1 * 1024 * 1024 * 1024 \
 470                : 32 * 1024 * 1024)
 471
 472#endif /* NO_MMAP */
 473
 474#ifndef MAP_FAILED
 475#define MAP_FAILED ((void *)-1)
 476#endif
 477
 478#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 479#define on_disk_bytes(st) ((st).st_size)
 480#else
 481#define on_disk_bytes(st) ((st).st_blocks * 512)
 482#endif
 483
 484#define DEFAULT_PACKED_GIT_LIMIT \
 485        ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 486
 487#ifdef NO_PREAD
 488#define pread git_pread
 489extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 490#endif
 491/*
 492 * Forward decl that will remind us if its twin in cache.h changes.
 493 * This function is used in compat/pread.c.  But we can't include
 494 * cache.h there.
 495 */
 496extern ssize_t read_in_full(int fd, void *buf, size_t count);
 497
 498#ifdef NO_SETENV
 499#define setenv gitsetenv
 500extern int gitsetenv(const char *, const char *, int);
 501#endif
 502
 503#ifdef NO_MKDTEMP
 504#define mkdtemp gitmkdtemp
 505extern char *gitmkdtemp(char *);
 506#endif
 507
 508#ifdef NO_MKSTEMPS
 509#define mkstemps gitmkstemps
 510extern int gitmkstemps(char *, int);
 511#endif
 512
 513#ifdef NO_UNSETENV
 514#define unsetenv gitunsetenv
 515extern void gitunsetenv(const char *);
 516#endif
 517
 518#ifdef NO_STRCASESTR
 519#define strcasestr gitstrcasestr
 520extern char *gitstrcasestr(const char *haystack, const char *needle);
 521#endif
 522
 523#ifdef NO_STRLCPY
 524#define strlcpy gitstrlcpy
 525extern size_t gitstrlcpy(char *, const char *, size_t);
 526#endif
 527
 528#ifdef NO_STRTOUMAX
 529#define strtoumax gitstrtoumax
 530extern uintmax_t gitstrtoumax(const char *, char **, int);
 531#define strtoimax gitstrtoimax
 532extern intmax_t gitstrtoimax(const char *, char **, int);
 533#endif
 534
 535#ifdef NO_HSTRERROR
 536#define hstrerror githstrerror
 537extern const char *githstrerror(int herror);
 538#endif
 539
 540#ifdef NO_MEMMEM
 541#define memmem gitmemmem
 542void *gitmemmem(const void *haystack, size_t haystacklen,
 543                const void *needle, size_t needlelen);
 544#endif
 545
 546#ifdef NO_GETPAGESIZE
 547#define getpagesize() sysconf(_SC_PAGESIZE)
 548#endif
 549
 550#ifdef FREAD_READS_DIRECTORIES
 551#ifdef fopen
 552#undef fopen
 553#endif
 554#define fopen(a,b) git_fopen(a,b)
 555extern FILE *git_fopen(const char*, const char*);
 556#endif
 557
 558#ifdef SNPRINTF_RETURNS_BOGUS
 559#ifdef snprintf
 560#undef snprintf
 561#endif
 562#define snprintf git_snprintf
 563extern int git_snprintf(char *str, size_t maxsize,
 564                        const char *format, ...);
 565#ifdef vsnprintf
 566#undef vsnprintf
 567#endif
 568#define vsnprintf git_vsnprintf
 569extern int git_vsnprintf(char *str, size_t maxsize,
 570                         const char *format, va_list ap);
 571#endif
 572
 573#ifdef __GLIBC_PREREQ
 574#if __GLIBC_PREREQ(2, 1)
 575#define HAVE_STRCHRNUL
 576#define HAVE_MEMPCPY
 577#endif
 578#endif
 579
 580#ifndef HAVE_STRCHRNUL
 581#define strchrnul gitstrchrnul
 582static inline char *gitstrchrnul(const char *s, int c)
 583{
 584        while (*s && *s != c)
 585                s++;
 586        return (char *)s;
 587}
 588#endif
 589
 590#ifndef HAVE_MEMPCPY
 591#define mempcpy gitmempcpy
 592static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 593{
 594        return (char *)memcpy(dest, src, n) + n;
 595}
 596#endif
 597
 598#ifdef NO_INET_PTON
 599int inet_pton(int af, const char *src, void *dst);
 600#endif
 601
 602#ifdef NO_INET_NTOP
 603const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 604#endif
 605
 606#ifdef NO_PTHREADS
 607#define atexit git_atexit
 608extern int git_atexit(void (*handler)(void));
 609#endif
 610
 611extern void release_pack_memory(size_t);
 612
 613typedef void (*try_to_free_t)(size_t);
 614extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 615
 616#ifdef HAVE_ALLOCA_H
 617# include <alloca.h>
 618# define xalloca(size)      (alloca(size))
 619# define xalloca_free(p)    do {} while (0)
 620#else
 621# define xalloca(size)      (xmalloc(size))
 622# define xalloca_free(p)    (free(p))
 623#endif
 624extern char *xstrdup(const char *str);
 625extern void *xmalloc(size_t size);
 626extern void *xmallocz(size_t size);
 627extern void *xmallocz_gently(size_t size);
 628extern void *xmemdupz(const void *data, size_t len);
 629extern char *xstrndup(const char *str, size_t len);
 630extern void *xrealloc(void *ptr, size_t size);
 631extern void *xcalloc(size_t nmemb, size_t size);
 632extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 633extern ssize_t xread(int fd, void *buf, size_t len);
 634extern ssize_t xwrite(int fd, const void *buf, size_t len);
 635extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 636extern int xdup(int fd);
 637extern FILE *xfdopen(int fd, const char *mode);
 638extern int xmkstemp(char *template);
 639extern int xmkstemp_mode(char *template, int mode);
 640extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 641extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 642extern char *xgetcwd(void);
 643
 644#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
 645
 646static inline size_t xsize_t(off_t len)
 647{
 648        if (len > (size_t) len)
 649                die("Cannot handle files this big");
 650        return (size_t)len;
 651}
 652
 653/* in ctype.c, for kwset users */
 654extern const char tolower_trans_tbl[256];
 655
 656/* Sane ctype - no locale, and works with signed chars */
 657#undef isascii
 658#undef isspace
 659#undef isdigit
 660#undef isalpha
 661#undef isalnum
 662#undef isprint
 663#undef islower
 664#undef isupper
 665#undef tolower
 666#undef toupper
 667#undef iscntrl
 668#undef ispunct
 669#undef isxdigit
 670
 671extern const unsigned char sane_ctype[256];
 672#define GIT_SPACE 0x01
 673#define GIT_DIGIT 0x02
 674#define GIT_ALPHA 0x04
 675#define GIT_GLOB_SPECIAL 0x08
 676#define GIT_REGEX_SPECIAL 0x10
 677#define GIT_PATHSPEC_MAGIC 0x20
 678#define GIT_CNTRL 0x40
 679#define GIT_PUNCT 0x80
 680#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 681#define isascii(x) (((x) & ~0x7f) == 0)
 682#define isspace(x) sane_istest(x,GIT_SPACE)
 683#define isdigit(x) sane_istest(x,GIT_DIGIT)
 684#define isalpha(x) sane_istest(x,GIT_ALPHA)
 685#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 686#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 687#define islower(x) sane_iscase(x, 1)
 688#define isupper(x) sane_iscase(x, 0)
 689#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 690#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 691#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 692#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 693                GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 694#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
 695#define tolower(x) sane_case((unsigned char)(x), 0x20)
 696#define toupper(x) sane_case((unsigned char)(x), 0)
 697#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 698
 699static inline int sane_case(int x, int high)
 700{
 701        if (sane_istest(x, GIT_ALPHA))
 702                x = (x & ~0x20) | high;
 703        return x;
 704}
 705
 706static inline int sane_iscase(int x, int is_lower)
 707{
 708        if (!sane_istest(x, GIT_ALPHA))
 709                return 0;
 710
 711        if (is_lower)
 712                return (x & 0x20) != 0;
 713        else
 714                return (x & 0x20) == 0;
 715}
 716
 717static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 718{
 719        unsigned long ul;
 720        char *p;
 721
 722        errno = 0;
 723        ul = strtoul(s, &p, base);
 724        if (errno || *p || p == s || (unsigned int) ul != ul)
 725                return -1;
 726        *result = ul;
 727        return 0;
 728}
 729
 730static inline int strtol_i(char const *s, int base, int *result)
 731{
 732        long ul;
 733        char *p;
 734
 735        errno = 0;
 736        ul = strtol(s, &p, base);
 737        if (errno || *p || p == s || (int) ul != ul)
 738                return -1;
 739        *result = ul;
 740        return 0;
 741}
 742
 743#ifdef INTERNAL_QSORT
 744void git_qsort(void *base, size_t nmemb, size_t size,
 745               int(*compar)(const void *, const void *));
 746#define qsort git_qsort
 747#endif
 748
 749#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 750# define FORCE_DIR_SET_GID S_ISGID
 751#else
 752# define FORCE_DIR_SET_GID 0
 753#endif
 754
 755#ifdef NO_NSEC
 756#undef USE_NSEC
 757#define ST_CTIME_NSEC(st) 0
 758#define ST_MTIME_NSEC(st) 0
 759#else
 760#ifdef USE_ST_TIMESPEC
 761#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 762#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 763#else
 764#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 765#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 766#endif
 767#endif
 768
 769#ifdef UNRELIABLE_FSTAT
 770#define fstat_is_reliable() 0
 771#else
 772#define fstat_is_reliable() 1
 773#endif
 774
 775#ifndef va_copy
 776/*
 777 * Since an obvious implementation of va_list would be to make it a
 778 * pointer into the stack frame, a simple assignment will work on
 779 * many systems.  But let's try to be more portable.
 780 */
 781#ifdef __va_copy
 782#define va_copy(dst, src) __va_copy(dst, src)
 783#else
 784#define va_copy(dst, src) ((dst) = (src))
 785#endif
 786#endif
 787
 788#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
 789#define HAVE_VARIADIC_MACROS 1
 790#endif
 791
 792/*
 793 * Preserves errno, prints a message, but gives no warning for ENOENT.
 794 * Returns 0 on success, which includes trying to unlink an object that does
 795 * not exist.
 796 */
 797int unlink_or_warn(const char *path);
 798 /*
 799  * Tries to unlink file.  Returns 0 if unlink succeeded
 800  * or the file already didn't exist.  Returns -1 and
 801  * appends a message to err suitable for
 802  * 'error("%s", err->buf)' on error.
 803  */
 804int unlink_or_msg(const char *file, struct strbuf *err);
 805/*
 806 * Preserves errno, prints a message, but gives no warning for ENOENT.
 807 * Returns 0 on success, which includes trying to remove a directory that does
 808 * not exist.
 809 */
 810int rmdir_or_warn(const char *path);
 811/*
 812 * Calls the correct function out of {unlink,rmdir}_or_warn based on
 813 * the supplied file mode.
 814 */
 815int remove_or_warn(unsigned int mode, const char *path);
 816
 817/*
 818 * Call access(2), but warn for any error except "missing file"
 819 * (ENOENT or ENOTDIR).
 820 */
 821#define ACCESS_EACCES_OK (1U << 0)
 822int access_or_warn(const char *path, int mode, unsigned flag);
 823int access_or_die(const char *path, int mode, unsigned flag);
 824
 825/* Warn on an inaccessible file that ought to be accessible */
 826void warn_on_inaccessible(const char *path);
 827
 828/* Get the passwd entry for the UID of the current process. */
 829struct passwd *xgetpwuid_self(void);
 830
 831#ifdef GMTIME_UNRELIABLE_ERRORS
 832struct tm *git_gmtime(const time_t *);
 833struct tm *git_gmtime_r(const time_t *, struct tm *);
 834#define gmtime git_gmtime
 835#define gmtime_r git_gmtime_r
 836#endif
 837
 838#endif