Andrew's git / gitweb.git / git-compat-util.h
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git-compat-util.hon commit git-hash-object.txt: document --literally option (83115ac)
   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 */
 162typedef long intptr_t;
 163typedef 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))
 187extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
 188#endif
 189
 190#ifdef NO_STRUCT_ITIMERVAL
 191struct 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
 205extern 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
 267static inline int git_has_dos_drive_prefix(const char *path)
 268{
 269        return 0;
 270}
 271#define has_dos_drive_prefix git_has_dos_drive_prefix
 272#endif
 273
 274#ifndef is_dir_sep
 275static inline int git_is_dir_sep(int c)
 276{
 277        return c == '/';
 278}
 279#define is_dir_sep git_is_dir_sep
 280#endif
 281
 282#ifndef offset_1st_component
 283static inline int git_offset_1st_component(const char *path)
 284{
 285        return is_dir_sep(path[0]);
 286}
 287#define offset_1st_component git_offset_1st_component
 288#endif
 289
 290#ifndef find_last_dir_sep
 291static inline char *git_find_last_dir_sep(const char *path)
 292{
 293        return strrchr(path, '/');
 294}
 295#define find_last_dir_sep git_find_last_dir_sep
 296#endif
 297
 298#if defined(__HP_cc) && (__HP_cc >= 61000)
 299#define NORETURN __attribute__((noreturn))
 300#define NORETURN_PTR
 301#elif defined(__GNUC__) && !defined(NO_NORETURN)
 302#define NORETURN __attribute__((__noreturn__))
 303#define NORETURN_PTR __attribute__((__noreturn__))
 304#elif defined(_MSC_VER)
 305#define NORETURN __declspec(noreturn)
 306#define NORETURN_PTR
 307#else
 308#define NORETURN
 309#define NORETURN_PTR
 310#ifndef __GNUC__
 311#ifndef __attribute__
 312#define __attribute__(x)
 313#endif
 314#endif
 315#endif
 316
 317/* The sentinel attribute is valid from gcc version 4.0 */
 318#if defined(__GNUC__) && (__GNUC__ >= 4)
 319#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 320#else
 321#define LAST_ARG_MUST_BE_NULL
 322#endif
 323
 324#include "compat/bswap.h"
 325
 326#include "wildmatch.h"
 327
 328/* General helper functions */
 329extern void vreportf(const char *prefix, const char *err, va_list params);
 330extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
 331extern NORETURN void usage(const char *err);
 332extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 333extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 334extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 335extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 336extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 337
 338#ifndef NO_OPENSSL
 339#ifdef APPLE_COMMON_CRYPTO
 340#include "compat/apple-common-crypto.h"
 341#else
 342#include <openssl/evp.h>
 343#include <openssl/hmac.h>
 344#endif /* APPLE_COMMON_CRYPTO */
 345#include <openssl/x509v3.h>
 346#endif /* NO_OPENSSL */
 347
 348/*
 349 * Let callers be aware of the constant return value; this can help
 350 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 351 * because some compilers may not support variadic macros. Since we're only
 352 * trying to help gcc, anyway, it's OK; other compilers will fall back to
 353 * using the function as usual.
 354 */
 355#if defined(__GNUC__)
 356static inline int const_error(void)
 357{
 358        return -1;
 359}
 360#define error(...) (error(__VA_ARGS__), const_error())
 361#endif
 362
 363extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 364extern void set_error_routine(void (*routine)(const char *err, va_list params));
 365extern void set_die_is_recursing_routine(int (*routine)(void));
 366
 367extern int starts_with(const char *str, const char *prefix);
 368
 369/*
 370 * If the string "str" begins with the string found in "prefix", return 1.
 371 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 372 * the string right after the prefix).
 373 *
 374 * Otherwise, return 0 and leave "out" untouched.
 375 *
 376 * Examples:
 377 *
 378 *   [extract branch name, fail if not a branch]
 379 *   if (!skip_prefix(ref, "refs/heads/", &branch)
 380 *      return -1;
 381 *
 382 *   [skip prefix if present, otherwise use whole string]
 383 *   skip_prefix(name, "refs/heads/", &name);
 384 */
 385static inline int skip_prefix(const char *str, const char *prefix,
 386                              const char **out)
 387{
 388        do {
 389                if (!*prefix) {
 390                        *out = str;
 391                        return 1;
 392                }
 393        } while (*str++ == *prefix++);
 394        return 0;
 395}
 396
 397/*
 398 * If buf ends with suffix, return 1 and subtract the length of the suffix
 399 * from *len. Otherwise, return 0 and leave *len untouched.
 400 */
 401static inline int strip_suffix_mem(const char *buf, size_t *len,
 402                                   const char *suffix)
 403{
 404        size_t suflen = strlen(suffix);
 405        if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 406                return 0;
 407        *len -= suflen;
 408        return 1;
 409}
 410
 411/*
 412 * If str ends with suffix, return 1 and set *len to the size of the string
 413 * without the suffix. Otherwise, return 0 and set *len to the size of the
 414 * string.
 415 *
 416 * Note that we do _not_ NUL-terminate str to the new length.
 417 */
 418static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 419{
 420        *len = strlen(str);
 421        return strip_suffix_mem(str, len, suffix);
 422}
 423
 424static inline int ends_with(const char *str, const char *suffix)
 425{
 426        size_t len;
 427        return strip_suffix(str, suffix, &len);
 428}
 429
 430#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 431
 432#ifndef PROT_READ
 433#define PROT_READ 1
 434#define PROT_WRITE 2
 435#define MAP_PRIVATE 1
 436#endif
 437
 438#define mmap git_mmap
 439#define munmap git_munmap
 440extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 441extern int git_munmap(void *start, size_t length);
 442
 443#else /* NO_MMAP || USE_WIN32_MMAP */
 444
 445#include <sys/mman.h>
 446
 447#endif /* NO_MMAP || USE_WIN32_MMAP */
 448
 449#ifdef NO_MMAP
 450
 451/* This value must be multiple of (pagesize * 2) */
 452#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 453
 454#else /* NO_MMAP */
 455
 456/* This value must be multiple of (pagesize * 2) */
 457#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 458        (sizeof(void*) >= 8 \
 459                ?  1 * 1024 * 1024 * 1024 \
 460                : 32 * 1024 * 1024)
 461
 462#endif /* NO_MMAP */
 463
 464#ifndef MAP_FAILED
 465#define MAP_FAILED ((void *)-1)
 466#endif
 467
 468#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 469#define on_disk_bytes(st) ((st).st_size)
 470#else
 471#define on_disk_bytes(st) ((st).st_blocks * 512)
 472#endif
 473
 474#define DEFAULT_PACKED_GIT_LIMIT \
 475        ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 476
 477#ifdef NO_PREAD
 478#define pread git_pread
 479extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 480#endif
 481/*
 482 * Forward decl that will remind us if its twin in cache.h changes.
 483 * This function is used in compat/pread.c.  But we can't include
 484 * cache.h there.
 485 */
 486extern ssize_t read_in_full(int fd, void *buf, size_t count);
 487
 488#ifdef NO_SETENV
 489#define setenv gitsetenv
 490extern int gitsetenv(const char *, const char *, int);
 491#endif
 492
 493#ifdef NO_MKDTEMP
 494#define mkdtemp gitmkdtemp
 495extern char *gitmkdtemp(char *);
 496#endif
 497
 498#ifdef NO_MKSTEMPS
 499#define mkstemps gitmkstemps
 500extern int gitmkstemps(char *, int);
 501#endif
 502
 503#ifdef NO_UNSETENV
 504#define unsetenv gitunsetenv
 505extern void gitunsetenv(const char *);
 506#endif
 507
 508#ifdef NO_STRCASESTR
 509#define strcasestr gitstrcasestr
 510extern char *gitstrcasestr(const char *haystack, const char *needle);
 511#endif
 512
 513#ifdef NO_STRLCPY
 514#define strlcpy gitstrlcpy
 515extern size_t gitstrlcpy(char *, const char *, size_t);
 516#endif
 517
 518#ifdef NO_STRTOUMAX
 519#define strtoumax gitstrtoumax
 520extern uintmax_t gitstrtoumax(const char *, char **, int);
 521#define strtoimax gitstrtoimax
 522extern intmax_t gitstrtoimax(const char *, char **, int);
 523#endif
 524
 525#ifdef NO_HSTRERROR
 526#define hstrerror githstrerror
 527extern const char *githstrerror(int herror);
 528#endif
 529
 530#ifdef NO_MEMMEM
 531#define memmem gitmemmem
 532void *gitmemmem(const void *haystack, size_t haystacklen,
 533                const void *needle, size_t needlelen);
 534#endif
 535
 536#ifdef NO_GETPAGESIZE
 537#define getpagesize() sysconf(_SC_PAGESIZE)
 538#endif
 539
 540#ifdef FREAD_READS_DIRECTORIES
 541#ifdef fopen
 542#undef fopen
 543#endif
 544#define fopen(a,b) git_fopen(a,b)
 545extern FILE *git_fopen(const char*, const char*);
 546#endif
 547
 548#ifdef SNPRINTF_RETURNS_BOGUS
 549#ifdef snprintf
 550#undef snprintf
 551#endif
 552#define snprintf git_snprintf
 553extern int git_snprintf(char *str, size_t maxsize,
 554                        const char *format, ...);
 555#ifdef vsnprintf
 556#undef vsnprintf
 557#endif
 558#define vsnprintf git_vsnprintf
 559extern int git_vsnprintf(char *str, size_t maxsize,
 560                         const char *format, va_list ap);
 561#endif
 562
 563#ifdef __GLIBC_PREREQ
 564#if __GLIBC_PREREQ(2, 1)
 565#define HAVE_STRCHRNUL
 566#define HAVE_MEMPCPY
 567#endif
 568#endif
 569
 570#ifndef HAVE_STRCHRNUL
 571#define strchrnul gitstrchrnul
 572static inline char *gitstrchrnul(const char *s, int c)
 573{
 574        while (*s && *s != c)
 575                s++;
 576        return (char *)s;
 577}
 578#endif
 579
 580#ifndef HAVE_MEMPCPY
 581#define mempcpy gitmempcpy
 582static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 583{
 584        return (char *)memcpy(dest, src, n) + n;
 585}
 586#endif
 587
 588#ifdef NO_INET_PTON
 589int inet_pton(int af, const char *src, void *dst);
 590#endif
 591
 592#ifdef NO_INET_NTOP
 593const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 594#endif
 595
 596extern void release_pack_memory(size_t);
 597
 598typedef void (*try_to_free_t)(size_t);
 599extern try_to_free_t set_try_to_free_routine(try_to_free_t);
 600
 601#ifdef HAVE_ALLOCA_H
 602# include <alloca.h>
 603# define xalloca(size)      (alloca(size))
 604# define xalloca_free(p)    do {} while (0)
 605#else
 606# define xalloca(size)      (xmalloc(size))
 607# define xalloca_free(p)    (free(p))
 608#endif
 609extern char *xstrdup(const char *str);
 610extern void *xmalloc(size_t size);
 611extern void *xmallocz(size_t size);
 612extern void *xmallocz_gently(size_t size);
 613extern void *xmemdupz(const void *data, size_t len);
 614extern char *xstrndup(const char *str, size_t len);
 615extern void *xrealloc(void *ptr, size_t size);
 616extern void *xcalloc(size_t nmemb, size_t size);
 617extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 618extern ssize_t xread(int fd, void *buf, size_t len);
 619extern ssize_t xwrite(int fd, const void *buf, size_t len);
 620extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 621extern int xdup(int fd);
 622extern FILE *xfdopen(int fd, const char *mode);
 623extern int xmkstemp(char *template);
 624extern int xmkstemp_mode(char *template, int mode);
 625extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 626extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
 627extern char *xgetcwd(void);
 628
 629static inline size_t xsize_t(off_t len)
 630{
 631        if (len > (size_t) len)
 632                die("Cannot handle files this big");
 633        return (size_t)len;
 634}
 635
 636/* in ctype.c, for kwset users */
 637extern const char tolower_trans_tbl[256];
 638
 639/* Sane ctype - no locale, and works with signed chars */
 640#undef isascii
 641#undef isspace
 642#undef isdigit
 643#undef isalpha
 644#undef isalnum
 645#undef isprint
 646#undef islower
 647#undef isupper
 648#undef tolower
 649#undef toupper
 650#undef iscntrl
 651#undef ispunct
 652#undef isxdigit
 653
 654extern const unsigned char sane_ctype[256];
 655#define GIT_SPACE 0x01
 656#define GIT_DIGIT 0x02
 657#define GIT_ALPHA 0x04
 658#define GIT_GLOB_SPECIAL 0x08
 659#define GIT_REGEX_SPECIAL 0x10
 660#define GIT_PATHSPEC_MAGIC 0x20
 661#define GIT_CNTRL 0x40
 662#define GIT_PUNCT 0x80
 663#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 664#define isascii(x) (((x) & ~0x7f) == 0)
 665#define isspace(x) sane_istest(x,GIT_SPACE)
 666#define isdigit(x) sane_istest(x,GIT_DIGIT)
 667#define isalpha(x) sane_istest(x,GIT_ALPHA)
 668#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 669#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
 670#define islower(x) sane_iscase(x, 1)
 671#define isupper(x) sane_iscase(x, 0)
 672#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 673#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 674#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
 675#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
 676                GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
 677#define isxdigit(x) (hexval_table[x] != -1)
 678#define tolower(x) sane_case((unsigned char)(x), 0x20)
 679#define toupper(x) sane_case((unsigned char)(x), 0)
 680#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
 681
 682static inline int sane_case(int x, int high)
 683{
 684        if (sane_istest(x, GIT_ALPHA))
 685                x = (x & ~0x20) | high;
 686        return x;
 687}
 688
 689static inline int sane_iscase(int x, int is_lower)
 690{
 691        if (!sane_istest(x, GIT_ALPHA))
 692                return 0;
 693
 694        if (is_lower)
 695                return (x & 0x20) != 0;
 696        else
 697                return (x & 0x20) == 0;
 698}
 699
 700static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 701{
 702        unsigned long ul;
 703        char *p;
 704
 705        errno = 0;
 706        ul = strtoul(s, &p, base);
 707        if (errno || *p || p == s || (unsigned int) ul != ul)
 708                return -1;
 709        *result = ul;
 710        return 0;
 711}
 712
 713static inline int strtol_i(char const *s, int base, int *result)
 714{
 715        long ul;
 716        char *p;
 717
 718        errno = 0;
 719        ul = strtol(s, &p, base);
 720        if (errno || *p || p == s || (int) ul != ul)
 721                return -1;
 722        *result = ul;
 723        return 0;
 724}
 725
 726#ifdef INTERNAL_QSORT
 727void git_qsort(void *base, size_t nmemb, size_t size,
 728               int(*compar)(const void *, const void *));
 729#define qsort git_qsort
 730#endif
 731
 732#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 733# define FORCE_DIR_SET_GID S_ISGID
 734#else
 735# define FORCE_DIR_SET_GID 0
 736#endif
 737
 738#ifdef NO_NSEC
 739#undef USE_NSEC
 740#define ST_CTIME_NSEC(st) 0
 741#define ST_MTIME_NSEC(st) 0
 742#else
 743#ifdef USE_ST_TIMESPEC
 744#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 745#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 746#else
 747#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 748#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 749#endif
 750#endif
 751
 752#ifdef UNRELIABLE_FSTAT
 753#define fstat_is_reliable() 0
 754#else
 755#define fstat_is_reliable() 1
 756#endif
 757
 758#ifndef va_copy
 759/*
 760 * Since an obvious implementation of va_list would be to make it a
 761 * pointer into the stack frame, a simple assignment will work on
 762 * many systems.  But let's try to be more portable.
 763 */
 764#ifdef __va_copy
 765#define va_copy(dst, src) __va_copy(dst, src)
 766#else
 767#define va_copy(dst, src) ((dst) = (src))
 768#endif
 769#endif
 770
 771#if defined(__GNUC__) || (_MSC_VER >= 1400)
 772#define HAVE_VARIADIC_MACROS 1
 773#endif
 774
 775/*
 776 * Preserves errno, prints a message, but gives no warning for ENOENT.
 777 * Always returns the return value of unlink(2).
 778 */
 779int unlink_or_warn(const char *path);
 780/*
 781 * Likewise for rmdir(2).
 782 */
 783int rmdir_or_warn(const char *path);
 784/*
 785 * Calls the correct function out of {unlink,rmdir}_or_warn based on
 786 * the supplied file mode.
 787 */
 788int remove_or_warn(unsigned int mode, const char *path);
 789
 790/*
 791 * Call access(2), but warn for any error except "missing file"
 792 * (ENOENT or ENOTDIR).
 793 */
 794#define ACCESS_EACCES_OK (1U << 0)
 795int access_or_warn(const char *path, int mode, unsigned flag);
 796int access_or_die(const char *path, int mode, unsigned flag);
 797
 798/* Warn on an inaccessible file that ought to be accessible */
 799void warn_on_inaccessible(const char *path);
 800
 801/* Get the passwd entry for the UID of the current process. */
 802struct passwd *xgetpwuid_self(void);
 803
 804#ifdef GMTIME_UNRELIABLE_ERRORS
 805struct tm *git_gmtime(const time_t *);
 806struct tm *git_gmtime_r(const time_t *, struct tm *);
 807#define gmtime git_gmtime
 808#define gmtime_r git_gmtime_r
 809#endif
 810
 811#endif