]>
git.ipfire.org Git - thirdparty/git.git/blob - git-compat-util.h
1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
7 /* Derived from Linux "Features Test Macro" header
8 * Convenience macros to test the versions of gcc (or
9 * a compatible compiler).
11 * #if GIT_GNUC_PREREQ (2,8)
12 * ... code requiring gcc 2.8 or later ...
15 #if defined(__GNUC__) && defined(__GNUC_MINOR__)
16 # define GIT_GNUC_PREREQ(maj, min) \
17 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
19 #define GIT_GNUC_PREREQ(maj, min) 0
25 * See if our compiler is known to support flexible array members.
27 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
28 # define FLEX_ARRAY /* empty */
29 #elif defined(__GNUC__)
31 # define FLEX_ARRAY /* empty */
33 # define FLEX_ARRAY 0 /* older GNU extension */
38 * Otherwise, default to safer but a bit wasteful traditional style
47 * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression.
48 * @cond: the compile-time condition which must be true.
50 * Your compile will fail if the condition isn't true, or can't be evaluated
51 * by the compiler. This can be used in an expression: its value is "0".
54 * #define foo_to_char(foo) \
56 * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0))
58 #define BUILD_ASSERT_OR_ZERO(cond) \
59 (sizeof(char [1 - 2*!(cond)]) - 1)
61 #if GIT_GNUC_PREREQ(3, 1)
62 /* &arr[0] degrades to a pointer: a different type from an array */
63 # define BARF_UNLESS_AN_ARRAY(arr) \
64 BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \
65 __typeof__(&(arr)[0])))
67 # define BARF_UNLESS_AN_ARRAY(arr) 0
70 * ARRAY_SIZE - get the number of elements in a visible array
71 * <at> x: the array whose size you want.
73 * This does not work on pointers, or arrays declared as [], or
74 * function parameters. With correct compiler support, such usage
75 * will cause a build error (see the build_assert_or_zero macro).
77 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x))
79 #define bitsizeof(x) (CHAR_BIT * sizeof(x))
81 #define maximum_signed_value_of_type(a) \
82 (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
84 #define maximum_unsigned_value_of_type(a) \
85 (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
88 * Signed integer overflow is undefined in C, so here's a helper macro
89 * to detect if the sum of two integers will overflow.
91 * Requires: a >= 0, typeof(a) equals typeof(b)
93 #define signed_add_overflows(a, b) \
94 ((b) > maximum_signed_value_of_type(a) - (a))
96 #define unsigned_add_overflows(a, b) \
97 ((b) > maximum_unsigned_value_of_type(a) - (a))
100 #define TYPEOF(x) (__typeof__(x))
105 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
106 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
108 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
110 /* Approximation of the length of the decimal representation of this type. */
111 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
115 * On Solaris, when _XOPEN_EXTENDED is set, its header file
116 * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
117 * setting to say we are XPG5 or XPG6. Also on Solaris,
118 * XPG6 programs must be compiled with a c99 compiler, while
119 * non XPG6 programs must be compiled with a pre-c99 compiler.
121 # if __STDC_VERSION__ - 0 >= 199901L
122 # define _XOPEN_SOURCE 600
124 # define _XOPEN_SOURCE 500
126 #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
127 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
128 !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
130 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
131 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
133 #define _ALL_SOURCE 1
134 #define _GNU_SOURCE 1
135 #define _BSD_SOURCE 1
136 #define _DEFAULT_SOURCE 1
137 #define _NETBSD_SOURCE 1
138 #define _SGI_SOURCE 1
140 #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
141 # if defined (_MSC_VER) && !defined(_WIN32_WINNT)
142 # define _WIN32_WINNT 0x0502
144 #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
145 #include <winsock2.h>
147 #define GIT_WINDOWS_NATIVE
152 #include <sys/stat.h>
158 #ifdef HAVE_STRINGS_H
159 #include <strings.h> /* for strcasecmp() */
163 #ifdef NEEDS_SYS_PARAM_H
164 #include <sys/param.h>
166 #include <sys/types.h>
168 #include <sys/time.h>
175 #ifndef NO_SYS_POLL_H
176 #include <sys/poll.h>
180 #ifdef HAVE_BSD_SYSCTL
181 #include <sys/sysctl.h>
184 #if defined(__MINGW32__)
185 /* pull in Windows compatibility stuff */
186 #include "compat/mingw.h"
187 #elif defined(_MSC_VER)
188 #include "compat/msvc.h"
190 #include <sys/utsname.h>
191 #include <sys/wait.h>
192 #include <sys/resource.h>
193 #include <sys/socket.h>
194 #include <sys/ioctl.h>
196 #ifndef NO_SYS_SELECT_H
197 #include <sys/select.h>
199 #include <netinet/in.h>
200 #include <netinet/tcp.h>
201 #include <arpa/inet.h>
205 #ifndef NO_INTTYPES_H
206 #include <inttypes.h>
212 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
213 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
214 * while on IP16 and IP16L32 it is "int" (resp. "short")
215 * Size needs to match (or exceed) 'sizeof(void *)'.
216 * We can't take "long long" here as not everybody has it.
218 typedef long intptr_t;
219 typedef unsigned long uintptr_t;
221 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
223 #define _ALL_SOURCE 1
226 /* used on Mac OS X */
227 #ifdef PRECOMPOSE_UNICODE
228 #include "compat/precompose_utf8.h"
230 #define precompose_str(in,i_nfd2nfc)
231 #define precompose_argv(c,v)
232 #define probe_utf8_pathname_composition()
235 #ifdef MKDIR_WO_TRAILING_SLASH
236 #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
237 extern int compat_mkdir_wo_trailing_slash(const char*, mode_t
);
240 #ifdef NO_STRUCT_ITIMERVAL
242 struct timeval it_interval
;
243 struct timeval it_value
;
248 #define setitimer(which,value,ovalue)
254 #define basename gitbasename
255 extern char *gitbasename(char *);
256 #define dirname gitdirname
257 extern char *gitdirname(char *);
266 #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
267 #include <AvailabilityMacros.h>
268 #undef DEPRECATED_ATTRIBUTE
269 #define DEPRECATED_ATTRIBUTE
270 #undef __AVAILABILITY_MACROS_USES_AVAILABILITY
272 #include <openssl/ssl.h>
273 #include <openssl/err.h>
274 #ifdef NO_HMAC_CTX_CLEANUP
275 #define HMAC_CTX_cleanup HMAC_cleanup
279 /* On most systems <netdb.h> would have given us this, but
280 * not on some systems (e.g. z/OS).
283 #define NI_MAXHOST 1025
287 #define NI_MAXSERV 32
290 /* On most systems <limits.h> would have given us this, but
291 * not on some systems (e.g. GNU/Hurd).
294 #define PATH_MAX 4096
298 #define PRIuMAX "llu"
302 #define SCNuMAX PRIuMAX
324 #ifndef _PATH_DEFPATH
325 #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
328 #ifndef has_dos_drive_prefix
329 static inline int git_has_dos_drive_prefix(const char *path
)
333 #define has_dos_drive_prefix git_has_dos_drive_prefix
336 #ifndef skip_dos_drive_prefix
337 static inline int git_skip_dos_drive_prefix(char **path
)
341 #define skip_dos_drive_prefix git_skip_dos_drive_prefix
345 static inline int git_is_dir_sep(int c
)
349 #define is_dir_sep git_is_dir_sep
352 #ifndef offset_1st_component
353 static inline int git_offset_1st_component(const char *path
)
355 return is_dir_sep(path
[0]);
357 #define offset_1st_component git_offset_1st_component
360 #ifndef find_last_dir_sep
361 static inline char *git_find_last_dir_sep(const char *path
)
363 return strrchr(path
, '/');
365 #define find_last_dir_sep git_find_last_dir_sep
368 #if defined(__HP_cc) && (__HP_cc >= 61000)
369 #define NORETURN __attribute__((noreturn))
371 #elif defined(__GNUC__) && !defined(NO_NORETURN)
372 #define NORETURN __attribute__((__noreturn__))
373 #define NORETURN_PTR __attribute__((__noreturn__))
374 #elif defined(_MSC_VER)
375 #define NORETURN __declspec(noreturn)
381 #ifndef __attribute__
382 #define __attribute__(x)
387 /* The sentinel attribute is valid from gcc version 4.0 */
388 #if defined(__GNUC__) && (__GNUC__ >= 4)
389 #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
391 #define LAST_ARG_MUST_BE_NULL
394 #include "compat/bswap.h"
396 #include "wildmatch.h"
400 /* General helper functions */
401 extern void vreportf(const char *prefix
, const char *err
, va_list params
);
402 extern NORETURN
void usage(const char *err
);
403 extern NORETURN
void usagef(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
404 extern NORETURN
void die(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
405 extern NORETURN
void die_errno(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
406 extern int error(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
407 extern void warning(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
410 #ifdef APPLE_COMMON_CRYPTO
411 #include "compat/apple-common-crypto.h"
413 #include <openssl/evp.h>
414 #include <openssl/hmac.h>
415 #endif /* APPLE_COMMON_CRYPTO */
416 #include <openssl/x509v3.h>
417 #endif /* NO_OPENSSL */
420 * Let callers be aware of the constant return value; this can help
421 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
422 * because some compilers may not support variadic macros. Since we're only
423 * trying to help gcc, anyway, it's OK; other compilers will fall back to
424 * using the function as usual.
426 #if defined(__GNUC__)
427 static inline int const_error(void)
431 #define error(...) (error(__VA_ARGS__), const_error())
434 extern void set_die_routine(NORETURN_PTR
void (*routine
)(const char *err
, va_list params
));
435 extern void set_error_routine(void (*routine
)(const char *err
, va_list params
));
436 extern void set_die_is_recursing_routine(int (*routine
)(void));
437 extern void set_error_handle(FILE *);
439 extern int starts_with(const char *str
, const char *prefix
);
442 * If the string "str" begins with the string found in "prefix", return 1.
443 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
444 * the string right after the prefix).
446 * Otherwise, return 0 and leave "out" untouched.
450 * [extract branch name, fail if not a branch]
451 * if (!skip_prefix(ref, "refs/heads/", &branch)
454 * [skip prefix if present, otherwise use whole string]
455 * skip_prefix(name, "refs/heads/", &name);
457 static inline int skip_prefix(const char *str
, const char *prefix
,
465 } while (*str
++ == *prefix
++);
470 * If buf ends with suffix, return 1 and subtract the length of the suffix
471 * from *len. Otherwise, return 0 and leave *len untouched.
473 static inline int strip_suffix_mem(const char *buf
, size_t *len
,
476 size_t suflen
= strlen(suffix
);
477 if (*len
< suflen
|| memcmp(buf
+ (*len
- suflen
), suffix
, suflen
))
484 * If str ends with suffix, return 1 and set *len to the size of the string
485 * without the suffix. Otherwise, return 0 and set *len to the size of the
488 * Note that we do _not_ NUL-terminate str to the new length.
490 static inline int strip_suffix(const char *str
, const char *suffix
, size_t *len
)
493 return strip_suffix_mem(str
, len
, suffix
);
496 static inline int ends_with(const char *str
, const char *suffix
)
499 return strip_suffix(str
, suffix
, &len
);
502 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
507 #define MAP_PRIVATE 1
510 #define mmap git_mmap
511 #define munmap git_munmap
512 extern void *git_mmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
513 extern int git_munmap(void *start
, size_t length
);
515 #else /* NO_MMAP || USE_WIN32_MMAP */
517 #include <sys/mman.h>
519 #endif /* NO_MMAP || USE_WIN32_MMAP */
523 /* This value must be multiple of (pagesize * 2) */
524 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
528 /* This value must be multiple of (pagesize * 2) */
529 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
530 (sizeof(void*) >= 8 \
531 ? 1 * 1024 * 1024 * 1024 \
537 #define MAP_FAILED ((void *)-1)
540 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
541 #define on_disk_bytes(st) ((st).st_size)
543 #define on_disk_bytes(st) ((st).st_blocks * 512)
546 #ifdef NEEDS_MODE_TRANSLATION
555 #define S_IFMT 0170000
556 #define S_IFREG 0100000
557 #define S_IFDIR 0040000
558 #define S_IFLNK 0120000
559 #define S_IFBLK 0060000
560 #define S_IFCHR 0020000
561 #define S_IFIFO 0010000
562 #define S_IFSOCK 0140000
566 #define stat(path, buf) git_stat(path, buf)
567 extern int git_stat(const char *, struct stat
*);
571 #define fstat(fd, buf) git_fstat(fd, buf)
572 extern int git_fstat(int, struct stat
*);
576 #define lstat(path, buf) git_lstat(path, buf)
577 extern int git_lstat(const char *, struct stat
*);
580 #define DEFAULT_PACKED_GIT_LIMIT \
581 ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? 8192 : 256))
584 #define pread git_pread
585 extern ssize_t
git_pread(int fd
, void *buf
, size_t count
, off_t offset
);
588 * Forward decl that will remind us if its twin in cache.h changes.
589 * This function is used in compat/pread.c. But we can't include
592 extern ssize_t
read_in_full(int fd
, void *buf
, size_t count
);
595 #define setenv gitsetenv
596 extern int gitsetenv(const char *, const char *, int);
600 #define mkdtemp gitmkdtemp
601 extern char *gitmkdtemp(char *);
605 #define mkstemps gitmkstemps
606 extern int gitmkstemps(char *, int);
610 #define unsetenv gitunsetenv
611 extern void gitunsetenv(const char *);
615 #define strcasestr gitstrcasestr
616 extern char *gitstrcasestr(const char *haystack
, const char *needle
);
620 #define strlcpy gitstrlcpy
621 extern size_t gitstrlcpy(char *, const char *, size_t);
625 #define strtoumax gitstrtoumax
626 extern uintmax_t gitstrtoumax(const char *, char **, int);
627 #define strtoimax gitstrtoimax
628 extern intmax_t gitstrtoimax(const char *, char **, int);
632 #define hstrerror githstrerror
633 extern const char *githstrerror(int herror
);
637 #define memmem gitmemmem
638 void *gitmemmem(const void *haystack
, size_t haystacklen
,
639 const void *needle
, size_t needlelen
);
642 #ifdef NO_GETPAGESIZE
643 #define getpagesize() sysconf(_SC_PAGESIZE)
646 #ifdef FREAD_READS_DIRECTORIES
650 #define fopen(a,b) git_fopen(a,b)
651 extern FILE *git_fopen(const char*, const char*);
654 #ifdef SNPRINTF_RETURNS_BOGUS
658 #define snprintf git_snprintf
659 extern int git_snprintf(char *str
, size_t maxsize
,
660 const char *format
, ...);
664 #define vsnprintf git_vsnprintf
665 extern int git_vsnprintf(char *str
, size_t maxsize
,
666 const char *format
, va_list ap
);
669 #ifdef __GLIBC_PREREQ
670 #if __GLIBC_PREREQ(2, 1)
671 #define HAVE_STRCHRNUL
676 #ifndef HAVE_STRCHRNUL
677 #define strchrnul gitstrchrnul
678 static inline char *gitstrchrnul(const char *s
, int c
)
680 while (*s
&& *s
!= c
)
687 #define mempcpy gitmempcpy
688 static inline void *gitmempcpy(void *dest
, const void *src
, size_t n
)
690 return (char *)memcpy(dest
, src
, n
) + n
;
695 int inet_pton(int af
, const char *src
, void *dst
);
699 const char *inet_ntop(int af
, const void *src
, char *dst
, size_t size
);
703 #define atexit git_atexit
704 extern int git_atexit(void (*handler
)(void));
707 extern void release_pack_memory(size_t);
709 typedef void (*try_to_free_t
)(size_t);
710 extern try_to_free_t
set_try_to_free_routine(try_to_free_t
);
714 # define xalloca(size) (alloca(size))
715 # define xalloca_free(p) do {} while (0)
717 # define xalloca(size) (xmalloc(size))
718 # define xalloca_free(p) (free(p))
720 extern char *xstrdup(const char *str
);
721 extern void *xmalloc(size_t size
);
722 extern void *xmallocz(size_t size
);
723 extern void *xmallocz_gently(size_t size
);
724 extern void *xmemdupz(const void *data
, size_t len
);
725 extern char *xstrndup(const char *str
, size_t len
);
726 extern void *xrealloc(void *ptr
, size_t size
);
727 extern void *xcalloc(size_t nmemb
, size_t size
);
728 extern void *xmmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
729 extern void *xmmap_gently(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
730 extern int xopen(const char *path
, int flags
, ...);
731 extern ssize_t
xread(int fd
, void *buf
, size_t len
);
732 extern ssize_t
xwrite(int fd
, const void *buf
, size_t len
);
733 extern ssize_t
xpread(int fd
, void *buf
, size_t len
, off_t offset
);
734 extern int xdup(int fd
);
735 extern FILE *xfopen(const char *path
, const char *mode
);
736 extern FILE *xfdopen(int fd
, const char *mode
);
737 extern int xmkstemp(char *template);
738 extern int xmkstemp_mode(char *template, int mode
);
739 extern int odb_mkstemp(char *template, size_t limit
, const char *pattern
);
740 extern int odb_pack_keep(char *name
, size_t namesz
, const unsigned char *sha1
);
741 extern char *xgetcwd(void);
742 extern FILE *fopen_for_writing(const char *path
);
744 #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
746 static inline char *xstrdup_or_null(const char *str
)
748 return str
? xstrdup(str
) : NULL
;
751 static inline size_t xsize_t(off_t len
)
753 if (len
> (size_t) len
)
754 die("Cannot handle files this big");
758 __attribute__((format (printf
, 3, 4)))
759 extern int xsnprintf(char *dst
, size_t max
, const char *fmt
, ...);
761 /* in ctype.c, for kwset users */
762 extern const unsigned char tolower_trans_tbl
[256];
764 /* Sane ctype - no locale, and works with signed chars */
779 extern const unsigned char sane_ctype
[256];
780 #define GIT_SPACE 0x01
781 #define GIT_DIGIT 0x02
782 #define GIT_ALPHA 0x04
783 #define GIT_GLOB_SPECIAL 0x08
784 #define GIT_REGEX_SPECIAL 0x10
785 #define GIT_PATHSPEC_MAGIC 0x20
786 #define GIT_CNTRL 0x40
787 #define GIT_PUNCT 0x80
788 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
789 #define isascii(x) (((x) & ~0x7f) == 0)
790 #define isspace(x) sane_istest(x,GIT_SPACE)
791 #define isdigit(x) sane_istest(x,GIT_DIGIT)
792 #define isalpha(x) sane_istest(x,GIT_ALPHA)
793 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
794 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
795 #define islower(x) sane_iscase(x, 1)
796 #define isupper(x) sane_iscase(x, 0)
797 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
798 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
799 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
800 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
801 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
802 #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
803 #define tolower(x) sane_case((unsigned char)(x), 0x20)
804 #define toupper(x) sane_case((unsigned char)(x), 0)
805 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
807 static inline int sane_case(int x
, int high
)
809 if (sane_istest(x
, GIT_ALPHA
))
810 x
= (x
& ~0x20) | high
;
814 static inline int sane_iscase(int x
, int is_lower
)
816 if (!sane_istest(x
, GIT_ALPHA
))
820 return (x
& 0x20) != 0;
822 return (x
& 0x20) == 0;
825 static inline int strtoul_ui(char const *s
, int base
, unsigned int *result
)
831 /* negative values would be accepted by strtoul */
834 ul
= strtoul(s
, &p
, base
);
835 if (errno
|| *p
|| p
== s
|| (unsigned int) ul
!= ul
)
841 static inline int strtol_i(char const *s
, int base
, int *result
)
847 ul
= strtol(s
, &p
, base
);
848 if (errno
|| *p
|| p
== s
|| (int) ul
!= ul
)
854 #ifdef INTERNAL_QSORT
855 void git_qsort(void *base
, size_t nmemb
, size_t size
,
856 int(*compar
)(const void *, const void *));
857 #define qsort git_qsort
860 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
861 # define FORCE_DIR_SET_GID S_ISGID
863 # define FORCE_DIR_SET_GID 0
868 #define ST_CTIME_NSEC(st) 0
869 #define ST_MTIME_NSEC(st) 0
871 #ifdef USE_ST_TIMESPEC
872 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
873 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
875 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
876 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
880 #ifdef UNRELIABLE_FSTAT
881 #define fstat_is_reliable() 0
883 #define fstat_is_reliable() 1
888 * Since an obvious implementation of va_list would be to make it a
889 * pointer into the stack frame, a simple assignment will work on
890 * many systems. But let's try to be more portable.
893 #define va_copy(dst, src) __va_copy(dst, src)
895 #define va_copy(dst, src) ((dst) = (src))
899 #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
900 #define HAVE_VARIADIC_MACROS 1
904 * Preserves errno, prints a message, but gives no warning for ENOENT.
905 * Returns 0 on success, which includes trying to unlink an object that does
908 int unlink_or_warn(const char *path
);
910 * Tries to unlink file. Returns 0 if unlink succeeded
911 * or the file already didn't exist. Returns -1 and
912 * appends a message to err suitable for
913 * 'error("%s", err->buf)' on error.
915 int unlink_or_msg(const char *file
, struct strbuf
*err
);
917 * Preserves errno, prints a message, but gives no warning for ENOENT.
918 * Returns 0 on success, which includes trying to remove a directory that does
921 int rmdir_or_warn(const char *path
);
923 * Calls the correct function out of {unlink,rmdir}_or_warn based on
924 * the supplied file mode.
926 int remove_or_warn(unsigned int mode
, const char *path
);
929 * Call access(2), but warn for any error except "missing file"
930 * (ENOENT or ENOTDIR).
932 #define ACCESS_EACCES_OK (1U << 0)
933 int access_or_warn(const char *path
, int mode
, unsigned flag
);
934 int access_or_die(const char *path
, int mode
, unsigned flag
);
936 /* Warn on an inaccessible file that ought to be accessible */
937 void warn_on_inaccessible(const char *path
);
939 #ifdef GMTIME_UNRELIABLE_ERRORS
940 struct tm
*git_gmtime(const time_t *);
941 struct tm
*git_gmtime_r(const time_t *, struct tm
*);
942 #define gmtime git_gmtime
943 #define gmtime_r git_gmtime_r
946 #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__)
947 #define USE_PARENS_AROUND_GETTEXT_N 1
951 # define SHELL_PATH "/bin/sh"
954 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
955 #define flockfile(fh)
956 #define funlockfile(fh)
957 #define getc_unlocked(fh) getc(fh)