1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
8 * See if our compiler is known to support flexible array members.
10 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
11 # define FLEX_ARRAY /* empty */
12 #elif defined(__GNUC__)
14 # define FLEX_ARRAY /* empty */
16 # define FLEX_ARRAY 0 /* older GNU extension */
21 * Otherwise, default to safer but a bit wasteful traditional style
28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
31 #define TYPEOF(x) (__typeof__(x))
36 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
37 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
39 /* Approximation of the length of the decimal representation of this type. */
40 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
42 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX)
43 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
45 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
51 #define _NETBSD_SOURCE 1
63 #include <sys/param.h>
64 #include <sys/types.h>
76 #include <sys/socket.h>
77 #include <sys/ioctl.h>
78 #ifndef NO_SYS_SELECT_H
79 #include <sys/select.h>
81 #include <netinet/in.h>
82 #include <netinet/tcp.h>
83 #include <arpa/inet.h>
87 #if defined(__CYGWIN__)
90 #define _XOPEN_SOURCE 600
91 #include "compat/cygwin.h"
93 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
97 #else /* __MINGW32__ */
98 /* pull in Windows compatibility stuff */
99 #include "compat/mingw.h"
100 #endif /* __MINGW32__ */
105 #define basename gitbasename
106 extern char *gitbasename(char *);
114 #include <openssl/ssl.h>
115 #include <openssl/err.h>
118 /* On most systems <limits.h> would have given us this, but
119 * not on some systems (e.g. GNU/Hurd).
122 #define PATH_MAX 4096
126 #define PRIuMAX "llu"
141 #ifndef STRIP_EXTENSION
142 #define STRIP_EXTENSION ""
145 #ifndef has_dos_drive_prefix
146 #define has_dos_drive_prefix(path) 0
150 #define is_dir_sep(c) ((c) == '/')
154 #define NORETURN __attribute__((__noreturn__))
157 #ifndef __attribute__
158 #define __attribute__(x)
162 /* General helper functions */
163 extern void usage(const char *err
) NORETURN
;
164 extern void die(const char *err
, ...) NORETURN
__attribute__((format (printf
, 1, 2)));
165 extern void die_errno(const char *err
, ...) NORETURN
__attribute__((format (printf
, 1, 2)));
166 extern int error(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
167 extern void warning(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
169 extern void set_die_routine(void (*routine
)(const char *err
, va_list params
) NORETURN
);
171 extern int prefixcmp(const char *str
, const char *prefix
);
172 extern time_t tm_to_time_t(const struct tm
*tm
);
174 static inline const char *skip_prefix(const char *str
, const char *prefix
)
176 size_t len
= strlen(prefix
);
177 return strncmp(str
, prefix
, len
) ? NULL
: str
+ len
;
180 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
185 #define MAP_PRIVATE 1
186 #define MAP_FAILED ((void*)-1)
189 #define mmap git_mmap
190 #define munmap git_munmap
191 extern void *git_mmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
192 extern int git_munmap(void *start
, size_t length
);
194 #else /* NO_MMAP || USE_WIN32_MMAP */
196 #include <sys/mman.h>
198 #endif /* NO_MMAP || USE_WIN32_MMAP */
202 /* This value must be multiple of (pagesize * 2) */
203 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
207 /* This value must be multiple of (pagesize * 2) */
208 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
209 (sizeof(void*) >= 8 \
210 ? 1 * 1024 * 1024 * 1024 \
215 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
216 #define on_disk_bytes(st) ((st).st_size)
218 #define on_disk_bytes(st) ((st).st_blocks * 512)
221 #define DEFAULT_PACKED_GIT_LIMIT \
222 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
225 #define pread git_pread
226 extern ssize_t
git_pread(int fd
, void *buf
, size_t count
, off_t offset
);
229 * Forward decl that will remind us if its twin in cache.h changes.
230 * This function is used in compat/pread.c. But we can't include
233 extern ssize_t
read_in_full(int fd
, void *buf
, size_t count
);
236 #define setenv gitsetenv
237 extern int gitsetenv(const char *, const char *, int);
241 #define mkdtemp gitmkdtemp
242 extern char *gitmkdtemp(char *);
246 #define mkstemps gitmkstemps
247 extern int gitmkstemps(char *, int);
251 #define unsetenv gitunsetenv
252 extern void gitunsetenv(const char *);
256 #define strcasestr gitstrcasestr
257 extern char *gitstrcasestr(const char *haystack
, const char *needle
);
261 #define strlcpy gitstrlcpy
262 extern size_t gitstrlcpy(char *, const char *, size_t);
266 #define strtoumax gitstrtoumax
267 extern uintmax_t gitstrtoumax(const char *, char **, int);
271 #define hstrerror githstrerror
272 extern const char *githstrerror(int herror
);
276 #define memmem gitmemmem
277 void *gitmemmem(const void *haystack
, size_t haystacklen
,
278 const void *needle
, size_t needlelen
);
281 #ifdef FREAD_READS_DIRECTORIES
285 #define fopen(a,b) git_fopen(a,b)
286 extern FILE *git_fopen(const char*, const char*);
289 #ifdef SNPRINTF_RETURNS_BOGUS
290 #define snprintf git_snprintf
291 extern int git_snprintf(char *str
, size_t maxsize
,
292 const char *format
, ...);
293 #define vsnprintf git_vsnprintf
294 extern int git_vsnprintf(char *str
, size_t maxsize
,
295 const char *format
, va_list ap
);
298 #ifdef __GLIBC_PREREQ
299 #if __GLIBC_PREREQ(2, 1)
300 #define HAVE_STRCHRNUL
304 #ifndef HAVE_STRCHRNUL
305 #define strchrnul gitstrchrnul
306 static inline char *gitstrchrnul(const char *s
, int c
)
308 while (*s
&& *s
!= c
)
314 extern void release_pack_memory(size_t, int);
316 extern char *xstrdup(const char *str
);
317 extern void *xmalloc(size_t size
);
318 extern void *xmemdupz(const void *data
, size_t len
);
319 extern char *xstrndup(const char *str
, size_t len
);
320 extern void *xrealloc(void *ptr
, size_t size
);
321 extern void *xcalloc(size_t nmemb
, size_t size
);
322 extern void *xmmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
323 extern ssize_t
xread(int fd
, void *buf
, size_t len
);
324 extern ssize_t
xwrite(int fd
, const void *buf
, size_t len
);
325 extern int xdup(int fd
);
326 extern FILE *xfdopen(int fd
, const char *mode
);
327 extern int xmkstemp(char *template);
328 extern int odb_mkstemp(char *template, size_t limit
, const char *pattern
);
329 extern int odb_pack_keep(char *name
, size_t namesz
, unsigned char *sha1
);
331 static inline size_t xsize_t(off_t len
)
336 static inline int has_extension(const char *filename
, const char *ext
)
338 size_t len
= strlen(filename
);
339 size_t extlen
= strlen(ext
);
340 return len
> extlen
&& !memcmp(filename
+ len
- extlen
, ext
, extlen
);
343 /* Sane ctype - no locale, and works with signed chars */
351 extern unsigned char sane_ctype
[256];
352 #define GIT_SPACE 0x01
353 #define GIT_DIGIT 0x02
354 #define GIT_ALPHA 0x04
355 #define GIT_GLOB_SPECIAL 0x08
356 #define GIT_REGEX_SPECIAL 0x10
357 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
358 #define isascii(x) (((x) & ~0x7f) == 0)
359 #define isspace(x) sane_istest(x,GIT_SPACE)
360 #define isdigit(x) sane_istest(x,GIT_DIGIT)
361 #define isalpha(x) sane_istest(x,GIT_ALPHA)
362 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
363 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
364 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
365 #define tolower(x) sane_case((unsigned char)(x), 0x20)
366 #define toupper(x) sane_case((unsigned char)(x), 0)
368 static inline int sane_case(int x
, int high
)
370 if (sane_istest(x
, GIT_ALPHA
))
371 x
= (x
& ~0x20) | high
;
375 static inline int strtoul_ui(char const *s
, int base
, unsigned int *result
)
381 ul
= strtoul(s
, &p
, base
);
382 if (errno
|| *p
|| p
== s
|| (unsigned int) ul
!= ul
)
388 static inline int strtol_i(char const *s
, int base
, int *result
)
394 ul
= strtol(s
, &p
, base
);
395 if (errno
|| *p
|| p
== s
|| (int) ul
!= ul
)
401 #ifdef INTERNAL_QSORT
402 void git_qsort(void *base
, size_t nmemb
, size_t size
,
403 int(*compar
)(const void *, const void *));
404 #define qsort git_qsort
407 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
408 # define FORCE_DIR_SET_GID S_ISGID
410 # define FORCE_DIR_SET_GID 0
415 #define ST_CTIME_NSEC(st) 0
416 #define ST_MTIME_NSEC(st) 0
418 #ifdef USE_ST_TIMESPEC
419 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
420 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
422 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
423 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
427 #ifdef UNRELIABLE_FSTAT
428 #define fstat_is_reliable() 0
430 #define fstat_is_reliable() 1
434 * Preserves errno, prints a message, but gives no warning for ENOENT.
435 * Always returns the return value of unlink(2).
437 int unlink_or_warn(const char *path
);