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__)
43 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
44 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
60 #include <sys/param.h>
61 #include <sys/types.h>
73 #include <sys/socket.h>
74 #include <sys/ioctl.h>
75 #ifndef NO_SYS_SELECT_H
76 #include <sys/select.h>
78 #include <netinet/in.h>
79 #include <netinet/tcp.h>
80 #include <arpa/inet.h>
84 #if defined(__CYGWIN__)
87 #define _XOPEN_SOURCE 600
89 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
93 #else /* __MINGW32__ */
94 /* pull in Windows compatibility stuff */
95 #include "compat/mingw.h"
96 #endif /* __MINGW32__ */
102 /* On most systems <limits.h> would have given us this, but
103 * not on some systems (e.g. GNU/Hurd).
106 #define PATH_MAX 4096
110 #define PRIuMAX "llu"
117 #ifndef has_dos_drive_prefix
118 #define has_dos_drive_prefix(path) 0
122 #define is_dir_sep(c) ((c) == '/')
126 #define NORETURN __attribute__((__noreturn__))
129 #ifndef __attribute__
130 #define __attribute__(x)
134 /* General helper functions */
135 extern void usage(const char *err
) NORETURN
;
136 extern void die(const char *err
, ...) NORETURN
__attribute__((format (printf
, 1, 2)));
137 extern int error(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
138 extern void warning(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
140 extern void set_usage_routine(void (*routine
)(const char *err
) NORETURN
);
141 extern void set_die_routine(void (*routine
)(const char *err
, va_list params
) NORETURN
);
142 extern void set_error_routine(void (*routine
)(const char *err
, va_list params
));
143 extern void set_warn_routine(void (*routine
)(const char *warn
, va_list params
));
145 extern int prefixcmp(const char *str
, const char *prefix
);
152 #define MAP_PRIVATE 1
153 #define MAP_FAILED ((void*)-1)
156 #define mmap git_mmap
157 #define munmap git_munmap
158 extern void *git_mmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
159 extern int git_munmap(void *start
, size_t length
);
161 /* This value must be multiple of (pagesize * 2) */
162 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
166 #include <sys/mman.h>
168 /* This value must be multiple of (pagesize * 2) */
169 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
170 (sizeof(void*) >= 8 \
171 ? 1 * 1024 * 1024 * 1024 \
176 #define DEFAULT_PACKED_GIT_LIMIT \
177 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
180 #define pread git_pread
181 extern ssize_t
git_pread(int fd
, void *buf
, size_t count
, off_t offset
);
184 * Forward decl that will remind us if its twin in cache.h changes.
185 * This function is used in compat/pread.c. But we can't include
188 extern int read_in_full(int fd
, void *buf
, size_t count
);
191 #define setenv gitsetenv
192 extern int gitsetenv(const char *, const char *, int);
196 #define mkdtemp gitmkdtemp
197 extern char *gitmkdtemp(char *);
201 #define unsetenv gitunsetenv
202 extern void gitunsetenv(const char *);
206 #define strcasestr gitstrcasestr
207 extern char *gitstrcasestr(const char *haystack
, const char *needle
);
211 #define strlcpy gitstrlcpy
212 extern size_t gitstrlcpy(char *, const char *, size_t);
216 #define strtoumax gitstrtoumax
217 extern uintmax_t gitstrtoumax(const char *, char **, int);
221 #define hstrerror githstrerror
222 extern const char *githstrerror(int herror
);
226 #define memmem gitmemmem
227 void *gitmemmem(const void *haystack
, size_t haystacklen
,
228 const void *needle
, size_t needlelen
);
231 #ifdef FREAD_READS_DIRECTORIES
232 #define fopen(a,b) git_fopen(a,b)
233 extern FILE *git_fopen(const char*, const char*);
236 #ifdef SNPRINTF_RETURNS_BOGUS
237 #define snprintf git_snprintf
238 extern int git_snprintf(char *str
, size_t maxsize
,
239 const char *format
, ...);
240 #define vsnprintf git_vsnprintf
241 extern int git_vsnprintf(char *str
, size_t maxsize
,
242 const char *format
, va_list ap
);
245 #ifdef __GLIBC_PREREQ
246 #if __GLIBC_PREREQ(2, 1)
247 #define HAVE_STRCHRNUL
251 #ifndef HAVE_STRCHRNUL
252 #define strchrnul gitstrchrnul
253 static inline char *gitstrchrnul(const char *s
, int c
)
255 while (*s
&& *s
!= c
)
261 extern void release_pack_memory(size_t, int);
263 static inline char* xstrdup(const char *str
)
265 char *ret
= strdup(str
);
267 release_pack_memory(strlen(str
) + 1, -1);
270 die("Out of memory, strdup failed");
275 static inline void *xmalloc(size_t size
)
277 void *ret
= malloc(size
);
281 release_pack_memory(size
, -1);
286 die("Out of memory, malloc failed");
288 #ifdef XMALLOC_POISON
289 memset(ret
, 0xA5, size
);
294 static inline void *xmemdupz(const void *data
, size_t len
)
296 char *p
= xmalloc(len
+ 1);
297 memcpy(p
, data
, len
);
302 static inline char *xstrndup(const char *str
, size_t len
)
304 char *p
= memchr(str
, '\0', len
);
305 return xmemdupz(str
, p
? p
- str
: len
);
308 static inline void *xrealloc(void *ptr
, size_t size
)
310 void *ret
= realloc(ptr
, size
);
312 ret
= realloc(ptr
, 1);
314 release_pack_memory(size
, -1);
315 ret
= realloc(ptr
, size
);
317 ret
= realloc(ptr
, 1);
319 die("Out of memory, realloc failed");
324 static inline void *xcalloc(size_t nmemb
, size_t size
)
326 void *ret
= calloc(nmemb
, size
);
327 if (!ret
&& (!nmemb
|| !size
))
330 release_pack_memory(nmemb
* size
, -1);
331 ret
= calloc(nmemb
, size
);
332 if (!ret
&& (!nmemb
|| !size
))
335 die("Out of memory, calloc failed");
340 static inline void *xmmap(void *start
, size_t length
,
341 int prot
, int flags
, int fd
, off_t offset
)
343 void *ret
= mmap(start
, length
, prot
, flags
, fd
, offset
);
344 if (ret
== MAP_FAILED
) {
347 release_pack_memory(length
, fd
);
348 ret
= mmap(start
, length
, prot
, flags
, fd
, offset
);
349 if (ret
== MAP_FAILED
)
350 die("Out of memory? mmap failed: %s", strerror(errno
));
355 static inline ssize_t
xread(int fd
, void *buf
, size_t len
)
359 nr
= read(fd
, buf
, len
);
360 if ((nr
< 0) && (errno
== EAGAIN
|| errno
== EINTR
))
366 static inline ssize_t
xwrite(int fd
, const void *buf
, size_t len
)
370 nr
= write(fd
, buf
, len
);
371 if ((nr
< 0) && (errno
== EAGAIN
|| errno
== EINTR
))
377 static inline int xdup(int fd
)
381 die("dup failed: %s", strerror(errno
));
385 static inline FILE *xfdopen(int fd
, const char *mode
)
387 FILE *stream
= fdopen(fd
, mode
);
389 die("Out of memory? fdopen failed: %s", strerror(errno
));
393 static inline int xmkstemp(char *template)
397 fd
= mkstemp(template);
399 die("Unable to create temporary file: %s", strerror(errno
));
403 static inline size_t xsize_t(off_t len
)
408 static inline int has_extension(const char *filename
, const char *ext
)
410 size_t len
= strlen(filename
);
411 size_t extlen
= strlen(ext
);
412 return len
> extlen
&& !memcmp(filename
+ len
- extlen
, ext
, extlen
);
415 /* Sane ctype - no locale, and works with signed chars */
422 extern unsigned char sane_ctype
[256];
423 #define GIT_SPACE 0x01
424 #define GIT_DIGIT 0x02
425 #define GIT_ALPHA 0x04
426 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
427 #define isspace(x) sane_istest(x,GIT_SPACE)
428 #define isdigit(x) sane_istest(x,GIT_DIGIT)
429 #define isalpha(x) sane_istest(x,GIT_ALPHA)
430 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
431 #define tolower(x) sane_case((unsigned char)(x), 0x20)
432 #define toupper(x) sane_case((unsigned char)(x), 0)
434 static inline int sane_case(int x
, int high
)
436 if (sane_istest(x
, GIT_ALPHA
))
437 x
= (x
& ~0x20) | high
;
441 static inline int strtoul_ui(char const *s
, int base
, unsigned int *result
)
447 ul
= strtoul(s
, &p
, base
);
448 if (errno
|| *p
|| p
== s
|| (unsigned int) ul
!= ul
)
454 static inline int strtol_i(char const *s
, int base
, int *result
)
460 ul
= strtol(s
, &p
, base
);
461 if (errno
|| *p
|| p
== s
|| (int) ul
!= ul
)
467 #ifdef INTERNAL_QSORT
468 void git_qsort(void *base
, size_t nmemb
, size_t size
,
469 int(*compar
)(const void *, const void *));
470 #define qsort git_qsort
473 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
474 # define FORCE_DIR_SET_GID S_ISGID
476 # define FORCE_DIR_SET_GID 0