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() */
44 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
53 #include <sys/statfs.h>
61 #include <sys/param.h>
62 #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 #include "../../../include/linux/magic.h"
91 /* On most systems <limits.h> would have given us this, but
92 * not on some systems (e.g. GNU/Hurd).
114 #ifndef STRIP_EXTENSION
115 #define STRIP_EXTENSION ""
118 #ifndef has_dos_drive_prefix
119 #define has_dos_drive_prefix(path) 0
123 #define is_dir_sep(c) ((c) == '/')
127 #define NORETURN __attribute__((__noreturn__))
130 #ifndef __attribute__
131 #define __attribute__(x)
135 /* General helper functions */
136 extern void usage(const char *err) NORETURN;
137 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
138 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
139 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
141 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
143 extern int prefixcmp(const char *str, const char *prefix);
144 extern time_t tm_to_time_t(const struct tm *tm);
146 static inline const char *skip_prefix(const char *str, const char *prefix)
148 size_t len = strlen(prefix);
149 return strncmp(str, prefix, len) ? NULL : str + len;
152 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
157 #define MAP_PRIVATE 1
158 #define MAP_FAILED ((void*)-1)
161 #define mmap git_mmap
162 #define munmap git_munmap
163 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
164 extern int git_munmap(void *start, size_t length);
166 #else /* NO_MMAP || USE_WIN32_MMAP */
168 #include <sys/mman.h>
170 #endif /* NO_MMAP || USE_WIN32_MMAP */
174 /* This value must be multiple of (pagesize * 2) */
175 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
179 /* This value must be multiple of (pagesize * 2) */
180 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
181 (sizeof(void*) >= 8 \
182 ? 1 * 1024 * 1024 * 1024 \
187 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
188 #define on_disk_bytes(st) ((st).st_size)
190 #define on_disk_bytes(st) ((st).st_blocks * 512)
193 #define DEFAULT_PACKED_GIT_LIMIT \
194 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
197 #define pread git_pread
198 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
201 * Forward decl that will remind us if its twin in cache.h changes.
202 * This function is used in compat/pread.c. But we can't include
205 extern ssize_t read_in_full(int fd, void *buf, size_t count);
208 #define setenv gitsetenv
209 extern int gitsetenv(const char *, const char *, int);
213 #define mkdtemp gitmkdtemp
214 extern char *gitmkdtemp(char *);
218 #define unsetenv gitunsetenv
219 extern void gitunsetenv(const char *);
223 #define strcasestr gitstrcasestr
224 extern char *gitstrcasestr(const char *haystack, const char *needle);
228 #define strlcpy gitstrlcpy
229 extern size_t gitstrlcpy(char *, const char *, size_t);
233 #define strtoumax gitstrtoumax
234 extern uintmax_t gitstrtoumax(const char *, char **, int);
238 #define hstrerror githstrerror
239 extern const char *githstrerror(int herror);
243 #define memmem gitmemmem
244 void *gitmemmem(const void *haystack, size_t haystacklen,
245 const void *needle, size_t needlelen);
248 #ifdef FREAD_READS_DIRECTORIES
252 #define fopen(a,b) git_fopen(a,b)
253 extern FILE *git_fopen(const char*, const char*);
256 #ifdef SNPRINTF_RETURNS_BOGUS
257 #define snprintf git_snprintf
258 extern int git_snprintf(char *str, size_t maxsize,
259 const char *format, ...);
260 #define vsnprintf git_vsnprintf
261 extern int git_vsnprintf(char *str, size_t maxsize,
262 const char *format, va_list ap);
265 #ifdef __GLIBC_PREREQ
266 #if __GLIBC_PREREQ(2, 1)
267 #define HAVE_STRCHRNUL
271 #ifndef HAVE_STRCHRNUL
272 #define strchrnul gitstrchrnul
273 static inline char *gitstrchrnul(const char *s, int c)
275 while (*s && *s != c)
284 extern char *xstrdup(const char *str);
285 extern void *xmalloc(size_t size);
286 extern void *xmemdupz(const void *data, size_t len);
287 extern char *xstrndup(const char *str, size_t len);
288 extern void *xrealloc(void *ptr, size_t size);
289 extern void *xcalloc(size_t nmemb, size_t size);
290 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
291 extern ssize_t xread(int fd, void *buf, size_t len);
292 extern ssize_t xwrite(int fd, const void *buf, size_t len);
293 extern int xdup(int fd);
294 extern FILE *xfdopen(int fd, const char *mode);
295 extern int xmkstemp(char *template);
297 static inline size_t xsize_t(off_t len)
302 static inline int has_extension(const char *filename, const char *ext)
304 size_t len = strlen(filename);
305 size_t extlen = strlen(ext);
306 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
309 /* Sane ctype - no locale, and works with signed chars */
317 extern unsigned char sane_ctype[256];
318 #define GIT_SPACE 0x01
319 #define GIT_DIGIT 0x02
320 #define GIT_ALPHA 0x04
321 #define GIT_GLOB_SPECIAL 0x08
322 #define GIT_REGEX_SPECIAL 0x10
323 #define GIT_PRINT_EXTRA 0x20
324 #define GIT_PRINT 0x3E
325 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
326 #define isascii(x) (((x) & ~0x7f) == 0)
327 #define isspace(x) sane_istest(x,GIT_SPACE)
328 #define isdigit(x) sane_istest(x,GIT_DIGIT)
329 #define isalpha(x) sane_istest(x,GIT_ALPHA)
330 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
331 #define isprint(x) sane_istest(x,GIT_PRINT)
332 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
333 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
334 #define tolower(x) sane_case((unsigned char)(x), 0x20)
335 #define toupper(x) sane_case((unsigned char)(x), 0)
337 static inline int sane_case(int x, int high)
339 if (sane_istest(x, GIT_ALPHA))
340 x = (x & ~0x20) | high;
344 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
350 ul = strtoul(s, &p, base);
351 if (errno || *p || p == s || (unsigned int) ul != ul)
357 static inline int strtol_i(char const *s, int base, int *result)
363 ul = strtol(s, &p, base);
364 if (errno || *p || p == s || (int) ul != ul)
370 #ifdef INTERNAL_QSORT
371 void git_qsort(void *base, size_t nmemb, size_t size,
372 int(*compar)(const void *, const void *));
373 #define qsort git_qsort
376 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
377 # define FORCE_DIR_SET_GID S_ISGID
379 # define FORCE_DIR_SET_GID 0
384 #define ST_CTIME_NSEC(st) 0
385 #define ST_MTIME_NSEC(st) 0
387 #ifdef USE_ST_TIMESPEC
388 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
389 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
391 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
392 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))