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 * Returns true if the multiplication of "a" and "b" will
101 * overflow. The types of "a" and "b" must match and must be unsigned.
102 * Note that this macro evaluates "a" twice!
104 #define unsigned_mult_overflows(a, b) \
105 ((a) && (b) > maximum_unsigned_value_of_type(a) / (a))
108 #define TYPEOF(x) (__typeof__(x))
113 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
114 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
116 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
118 /* Approximation of the length of the decimal representation of this type. */
119 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
123 * On Solaris, when _XOPEN_EXTENDED is set, its header file
124 * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
125 * setting to say we are XPG5 or XPG6. Also on Solaris,
126 * XPG6 programs must be compiled with a c99 compiler, while
127 * non XPG6 programs must be compiled with a pre-c99 compiler.
129 # if __STDC_VERSION__ - 0 >= 199901L
130 # define _XOPEN_SOURCE 600
132 # define _XOPEN_SOURCE 500
134 #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
135 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
136 !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
138 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
139 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
141 #define _ALL_SOURCE 1
142 #define _GNU_SOURCE 1
143 #define _BSD_SOURCE 1
144 #define _DEFAULT_SOURCE 1
145 #define _NETBSD_SOURCE 1
146 #define _SGI_SOURCE 1
148 #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
149 # if defined (_MSC_VER) && !defined(_WIN32_WINNT)
150 # define _WIN32_WINNT 0x0502
152 #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
153 #include <winsock2.h>
155 #define GIT_WINDOWS_NATIVE
160 #include <sys/stat.h>
166 #ifdef HAVE_STRINGS_H
167 #include <strings.h> /* for strcasecmp() */
171 #ifdef NEEDS_SYS_PARAM_H
172 #include <sys/param.h>
174 #include <sys/types.h>
176 #include <sys/time.h>
183 #ifndef NO_SYS_POLL_H
184 #include <sys/poll.h>
188 #ifdef HAVE_BSD_SYSCTL
189 #include <sys/sysctl.h>
192 #if defined(__MINGW32__)
193 /* pull in Windows compatibility stuff */
194 #include "compat/mingw.h"
195 #elif defined(_MSC_VER)
196 #include "compat/msvc.h"
198 #include <sys/utsname.h>
199 #include <sys/wait.h>
200 #include <sys/resource.h>
201 #include <sys/socket.h>
202 #include <sys/ioctl.h>
204 #ifndef NO_SYS_SELECT_H
205 #include <sys/select.h>
207 #include <netinet/in.h>
208 #include <netinet/tcp.h>
209 #include <arpa/inet.h>
213 #ifndef NO_INTTYPES_H
214 #include <inttypes.h>
220 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
221 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
222 * while on IP16 and IP16L32 it is "int" (resp. "short")
223 * Size needs to match (or exceed) 'sizeof(void *)'.
224 * We can't take "long long" here as not everybody has it.
226 typedef long intptr_t;
227 typedef unsigned long uintptr_t;
229 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
231 #define _ALL_SOURCE 1
234 /* used on Mac OS X */
235 #ifdef PRECOMPOSE_UNICODE
236 #include "compat/precompose_utf8.h"
238 #define precompose_str(in,i_nfd2nfc)
239 #define precompose_argv(c,v)
240 #define probe_utf8_pathname_composition(a,b)
243 #ifdef MKDIR_WO_TRAILING_SLASH
244 #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
245 extern int compat_mkdir_wo_trailing_slash(const char*, mode_t
);
248 #ifdef NO_STRUCT_ITIMERVAL
250 struct timeval it_interval
;
251 struct timeval it_value
;
256 #define setitimer(which,value,ovalue)
262 #define basename gitbasename
263 extern char *gitbasename(char *);
272 #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
273 #include <AvailabilityMacros.h>
274 #undef DEPRECATED_ATTRIBUTE
275 #define DEPRECATED_ATTRIBUTE
276 #undef __AVAILABILITY_MACROS_USES_AVAILABILITY
278 #include <openssl/ssl.h>
279 #include <openssl/err.h>
280 #ifdef NO_HMAC_CTX_CLEANUP
281 #define HMAC_CTX_cleanup HMAC_cleanup
285 /* On most systems <netdb.h> would have given us this, but
286 * not on some systems (e.g. z/OS).
289 #define NI_MAXHOST 1025
293 #define NI_MAXSERV 32
296 /* On most systems <limits.h> would have given us this, but
297 * not on some systems (e.g. GNU/Hurd).
300 #define PATH_MAX 4096
304 #define PRIuMAX "llu"
326 #ifndef _PATH_DEFPATH
327 #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
330 #ifndef STRIP_EXTENSION
331 #define STRIP_EXTENSION ""
334 #ifndef has_dos_drive_prefix
335 static inline int git_has_dos_drive_prefix(const char *path
)
339 #define has_dos_drive_prefix git_has_dos_drive_prefix
343 static inline int git_is_dir_sep(int c
)
347 #define is_dir_sep git_is_dir_sep
350 #ifndef offset_1st_component
351 static inline int git_offset_1st_component(const char *path
)
353 return is_dir_sep(path
[0]);
355 #define offset_1st_component git_offset_1st_component
358 #ifndef find_last_dir_sep
359 static inline char *git_find_last_dir_sep(const char *path
)
361 return strrchr(path
, '/');
363 #define find_last_dir_sep git_find_last_dir_sep
366 #if defined(__HP_cc) && (__HP_cc >= 61000)
367 #define NORETURN __attribute__((noreturn))
369 #elif defined(__GNUC__) && !defined(NO_NORETURN)
370 #define NORETURN __attribute__((__noreturn__))
371 #define NORETURN_PTR __attribute__((__noreturn__))
372 #elif defined(_MSC_VER)
373 #define NORETURN __declspec(noreturn)
379 #ifndef __attribute__
380 #define __attribute__(x)
385 /* The sentinel attribute is valid from gcc version 4.0 */
386 #if defined(__GNUC__) && (__GNUC__ >= 4)
387 #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
389 #define LAST_ARG_MUST_BE_NULL
392 #include "compat/bswap.h"
394 #include "wildmatch.h"
398 /* General helper functions */
399 extern void vreportf(const char *prefix
, const char *err
, va_list params
);
400 extern NORETURN
void usage(const char *err
);
401 extern NORETURN
void usagef(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
402 extern NORETURN
void die(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
403 extern NORETURN
void die_errno(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
404 extern int error(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
405 extern void warning(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
408 #ifdef APPLE_COMMON_CRYPTO
409 #include "compat/apple-common-crypto.h"
411 #include <openssl/evp.h>
412 #include <openssl/hmac.h>
413 #endif /* APPLE_COMMON_CRYPTO */
414 #include <openssl/x509v3.h>
415 #endif /* NO_OPENSSL */
418 * Let callers be aware of the constant return value; this can help
419 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
420 * because some compilers may not support variadic macros. Since we're only
421 * trying to help gcc, anyway, it's OK; other compilers will fall back to
422 * using the function as usual.
424 #if defined(__GNUC__)
425 static inline int const_error(void)
429 #define error(...) (error(__VA_ARGS__), const_error())
432 extern void set_die_routine(NORETURN_PTR
void (*routine
)(const char *err
, va_list params
));
433 extern void set_error_routine(void (*routine
)(const char *err
, va_list params
));
434 extern void set_die_is_recursing_routine(int (*routine
)(void));
435 extern void set_error_handle(FILE *);
437 extern int starts_with(const char *str
, const char *prefix
);
440 * If the string "str" begins with the string found in "prefix", return 1.
441 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
442 * the string right after the prefix).
444 * Otherwise, return 0 and leave "out" untouched.
448 * [extract branch name, fail if not a branch]
449 * if (!skip_prefix(ref, "refs/heads/", &branch)
452 * [skip prefix if present, otherwise use whole string]
453 * skip_prefix(name, "refs/heads/", &name);
455 static inline int skip_prefix(const char *str
, const char *prefix
,
463 } while (*str
++ == *prefix
++);
468 * If buf ends with suffix, return 1 and subtract the length of the suffix
469 * from *len. Otherwise, return 0 and leave *len untouched.
471 static inline int strip_suffix_mem(const char *buf
, size_t *len
,
474 size_t suflen
= strlen(suffix
);
475 if (*len
< suflen
|| memcmp(buf
+ (*len
- suflen
), suffix
, suflen
))
482 * If str ends with suffix, return 1 and set *len to the size of the string
483 * without the suffix. Otherwise, return 0 and set *len to the size of the
486 * Note that we do _not_ NUL-terminate str to the new length.
488 static inline int strip_suffix(const char *str
, const char *suffix
, size_t *len
)
491 return strip_suffix_mem(str
, len
, suffix
);
494 static inline int ends_with(const char *str
, const char *suffix
)
497 return strip_suffix(str
, suffix
, &len
);
500 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
505 #define MAP_PRIVATE 1
508 #define mmap git_mmap
509 #define munmap git_munmap
510 extern void *git_mmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
511 extern int git_munmap(void *start
, size_t length
);
513 #else /* NO_MMAP || USE_WIN32_MMAP */
515 #include <sys/mman.h>
517 #endif /* NO_MMAP || USE_WIN32_MMAP */
521 /* This value must be multiple of (pagesize * 2) */
522 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
526 /* This value must be multiple of (pagesize * 2) */
527 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
528 (sizeof(void*) >= 8 \
529 ? 1 * 1024 * 1024 * 1024 \
535 #define MAP_FAILED ((void *)-1)
538 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
539 #define on_disk_bytes(st) ((st).st_size)
541 #define on_disk_bytes(st) ((st).st_blocks * 512)
544 #ifdef NEEDS_MODE_TRANSLATION
553 #define S_IFMT 0170000
554 #define S_IFREG 0100000
555 #define S_IFDIR 0040000
556 #define S_IFLNK 0120000
557 #define S_IFBLK 0060000
558 #define S_IFCHR 0020000
559 #define S_IFIFO 0010000
560 #define S_IFSOCK 0140000
564 #define stat(path, buf) git_stat(path, buf)
565 extern int git_stat(const char *, struct stat
*);
569 #define fstat(fd, buf) git_fstat(fd, buf)
570 extern int git_fstat(int, struct stat
*);
574 #define lstat(path, buf) git_lstat(path, buf)
575 extern int git_lstat(const char *, struct stat
*);
578 #define DEFAULT_PACKED_GIT_LIMIT \
579 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
582 #define pread git_pread
583 extern ssize_t
git_pread(int fd
, void *buf
, size_t count
, off_t offset
);
586 * Forward decl that will remind us if its twin in cache.h changes.
587 * This function is used in compat/pread.c. But we can't include
590 extern ssize_t
read_in_full(int fd
, void *buf
, size_t count
);
593 #define setenv gitsetenv
594 extern int gitsetenv(const char *, const char *, int);
598 #define mkdtemp gitmkdtemp
599 extern char *gitmkdtemp(char *);
603 #define mkstemps gitmkstemps
604 extern int gitmkstemps(char *, int);
608 #define unsetenv gitunsetenv
609 extern void gitunsetenv(const char *);
613 #define strcasestr gitstrcasestr
614 extern char *gitstrcasestr(const char *haystack
, const char *needle
);
618 #define strlcpy gitstrlcpy
619 extern size_t gitstrlcpy(char *, const char *, size_t);
623 #define strtoumax gitstrtoumax
624 extern uintmax_t gitstrtoumax(const char *, char **, int);
625 #define strtoimax gitstrtoimax
626 extern intmax_t gitstrtoimax(const char *, char **, int);
630 #define hstrerror githstrerror
631 extern const char *githstrerror(int herror
);
635 #define memmem gitmemmem
636 void *gitmemmem(const void *haystack
, size_t haystacklen
,
637 const void *needle
, size_t needlelen
);
640 #ifdef NO_GETPAGESIZE
641 #define getpagesize() sysconf(_SC_PAGESIZE)
644 #ifdef FREAD_READS_DIRECTORIES
648 #define fopen(a,b) git_fopen(a,b)
649 extern FILE *git_fopen(const char*, const char*);
652 #ifdef SNPRINTF_RETURNS_BOGUS
656 #define snprintf git_snprintf
657 extern int git_snprintf(char *str
, size_t maxsize
,
658 const char *format
, ...);
662 #define vsnprintf git_vsnprintf
663 extern int git_vsnprintf(char *str
, size_t maxsize
,
664 const char *format
, va_list ap
);
667 #ifdef __GLIBC_PREREQ
668 #if __GLIBC_PREREQ(2, 1)
669 #define HAVE_STRCHRNUL
674 #ifndef HAVE_STRCHRNUL
675 #define strchrnul gitstrchrnul
676 static inline char *gitstrchrnul(const char *s
, int c
)
678 while (*s
&& *s
!= c
)
685 #define mempcpy gitmempcpy
686 static inline void *gitmempcpy(void *dest
, const void *src
, size_t n
)
688 return (char *)memcpy(dest
, src
, n
) + n
;
693 int inet_pton(int af
, const char *src
, void *dst
);
697 const char *inet_ntop(int af
, const void *src
, char *dst
, size_t size
);
701 #define atexit git_atexit
702 extern int git_atexit(void (*handler
)(void));
705 extern void release_pack_memory(size_t);
707 typedef void (*try_to_free_t
)(size_t);
708 extern try_to_free_t
set_try_to_free_routine(try_to_free_t
);
710 static inline size_t st_add(size_t a
, size_t b
)
712 if (unsigned_add_overflows(a
, b
))
713 die("size_t overflow: %"PRIuMAX
" + %"PRIuMAX
,
714 (uintmax_t)a
, (uintmax_t)b
);
717 #define st_add3(a,b,c) st_add((a),st_add((b),(c)))
718 #define st_add4(a,b,c,d) st_add((a),st_add3((b),(c),(d)))
720 static inline size_t st_mult(size_t a
, size_t b
)
722 if (unsigned_mult_overflows(a
, b
))
723 die("size_t overflow: %"PRIuMAX
" * %"PRIuMAX
,
724 (uintmax_t)a
, (uintmax_t)b
);
728 static inline size_t st_sub(size_t a
, size_t b
)
731 die("size_t underflow: %"PRIuMAX
" - %"PRIuMAX
,
732 (uintmax_t)a
, (uintmax_t)b
);
738 # define xalloca(size) (alloca(size))
739 # define xalloca_free(p) do {} while (0)
741 # define xalloca(size) (xmalloc(size))
742 # define xalloca_free(p) (free(p))
744 extern char *xstrdup(const char *str
);
745 extern void *xmalloc(size_t size
);
746 extern void *xmallocz(size_t size
);
747 extern void *xmallocz_gently(size_t size
);
748 extern void *xmemdupz(const void *data
, size_t len
);
749 extern char *xstrndup(const char *str
, size_t len
);
750 extern void *xrealloc(void *ptr
, size_t size
);
751 extern void *xcalloc(size_t nmemb
, size_t size
);
752 extern void *xmmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
753 extern void *xmmap_gently(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
754 extern ssize_t
xread(int fd
, void *buf
, size_t len
);
755 extern ssize_t
xwrite(int fd
, const void *buf
, size_t len
);
756 extern ssize_t
xpread(int fd
, void *buf
, size_t len
, off_t offset
);
757 extern int xdup(int fd
);
758 extern FILE *xfdopen(int fd
, const char *mode
);
759 extern int xmkstemp(char *template);
760 extern int xmkstemp_mode(char *template, int mode
);
761 extern int odb_mkstemp(char *template, size_t limit
, const char *pattern
);
762 extern int odb_pack_keep(char *name
, size_t namesz
, const unsigned char *sha1
);
763 extern char *xgetcwd(void);
765 #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
767 static inline char *xstrdup_or_null(const char *str
)
769 return str
? xstrdup(str
) : NULL
;
772 static inline size_t xsize_t(off_t len
)
774 if (len
> (size_t) len
)
775 die("Cannot handle files this big");
779 /* in ctype.c, for kwset users */
780 extern const unsigned char tolower_trans_tbl
[256];
782 /* Sane ctype - no locale, and works with signed chars */
797 extern const unsigned char sane_ctype
[256];
798 #define GIT_SPACE 0x01
799 #define GIT_DIGIT 0x02
800 #define GIT_ALPHA 0x04
801 #define GIT_GLOB_SPECIAL 0x08
802 #define GIT_REGEX_SPECIAL 0x10
803 #define GIT_PATHSPEC_MAGIC 0x20
804 #define GIT_CNTRL 0x40
805 #define GIT_PUNCT 0x80
806 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
807 #define isascii(x) (((x) & ~0x7f) == 0)
808 #define isspace(x) sane_istest(x,GIT_SPACE)
809 #define isdigit(x) sane_istest(x,GIT_DIGIT)
810 #define isalpha(x) sane_istest(x,GIT_ALPHA)
811 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
812 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
813 #define islower(x) sane_iscase(x, 1)
814 #define isupper(x) sane_iscase(x, 0)
815 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
816 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
817 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
818 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
819 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
820 #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
821 #define tolower(x) sane_case((unsigned char)(x), 0x20)
822 #define toupper(x) sane_case((unsigned char)(x), 0)
823 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
825 static inline int sane_case(int x
, int high
)
827 if (sane_istest(x
, GIT_ALPHA
))
828 x
= (x
& ~0x20) | high
;
832 static inline int sane_iscase(int x
, int is_lower
)
834 if (!sane_istest(x
, GIT_ALPHA
))
838 return (x
& 0x20) != 0;
840 return (x
& 0x20) == 0;
843 static inline int strtoul_ui(char const *s
, int base
, unsigned int *result
)
849 ul
= strtoul(s
, &p
, base
);
850 if (errno
|| *p
|| p
== s
|| (unsigned int) ul
!= ul
)
856 static inline int strtol_i(char const *s
, int base
, int *result
)
862 ul
= strtol(s
, &p
, base
);
863 if (errno
|| *p
|| p
== s
|| (int) ul
!= ul
)
869 #ifdef INTERNAL_QSORT
870 void git_qsort(void *base
, size_t nmemb
, size_t size
,
871 int(*compar
)(const void *, const void *));
872 #define qsort git_qsort
875 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
876 # define FORCE_DIR_SET_GID S_ISGID
878 # define FORCE_DIR_SET_GID 0
883 #define ST_CTIME_NSEC(st) 0
884 #define ST_MTIME_NSEC(st) 0
886 #ifdef USE_ST_TIMESPEC
887 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
888 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
890 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
891 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
895 #ifdef UNRELIABLE_FSTAT
896 #define fstat_is_reliable() 0
898 #define fstat_is_reliable() 1
903 * Since an obvious implementation of va_list would be to make it a
904 * pointer into the stack frame, a simple assignment will work on
905 * many systems. But let's try to be more portable.
908 #define va_copy(dst, src) __va_copy(dst, src)
910 #define va_copy(dst, src) ((dst) = (src))
914 #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
915 #define HAVE_VARIADIC_MACROS 1
919 * Preserves errno, prints a message, but gives no warning for ENOENT.
920 * Returns 0 on success, which includes trying to unlink an object that does
923 int unlink_or_warn(const char *path
);
925 * Tries to unlink file. Returns 0 if unlink succeeded
926 * or the file already didn't exist. Returns -1 and
927 * appends a message to err suitable for
928 * 'error("%s", err->buf)' on error.
930 int unlink_or_msg(const char *file
, struct strbuf
*err
);
932 * Preserves errno, prints a message, but gives no warning for ENOENT.
933 * Returns 0 on success, which includes trying to remove a directory that does
936 int rmdir_or_warn(const char *path
);
938 * Calls the correct function out of {unlink,rmdir}_or_warn based on
939 * the supplied file mode.
941 int remove_or_warn(unsigned int mode
, const char *path
);
944 * Call access(2), but warn for any error except "missing file"
945 * (ENOENT or ENOTDIR).
947 #define ACCESS_EACCES_OK (1U << 0)
948 int access_or_warn(const char *path
, int mode
, unsigned flag
);
949 int access_or_die(const char *path
, int mode
, unsigned flag
);
951 /* Warn on an inaccessible file that ought to be accessible */
952 void warn_on_inaccessible(const char *path
);
954 /* Get the passwd entry for the UID of the current process. */
955 struct passwd
*xgetpwuid_self(void);
957 #ifdef GMTIME_UNRELIABLE_ERRORS
958 struct tm
*git_gmtime(const time_t *);
959 struct tm
*git_gmtime_r(const time_t *, struct tm
*);
960 #define gmtime git_gmtime
961 #define gmtime_r git_gmtime_r
964 #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__)
965 #define USE_PARENS_AROUND_GETTEXT_N 1
969 # define SHELL_PATH "/bin/sh"
972 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
973 #define flockfile(fh)
974 #define funlockfile(fh)
975 #define getc_unlocked(fh) getc(fh)