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)
49 #include <sys/statfs.h>
57 #include <sys/param.h>
58 #include <sys/types.h>
69 #include <sys/socket.h>
70 #include <sys/ioctl.h>
71 #ifndef NO_SYS_SELECT_H
72 #include <sys/select.h>
74 #include <netinet/in.h>
75 #include <netinet/tcp.h>
76 #include <arpa/inet.h>
80 #include "../../../include/linux/magic.h"
87 /* On most systems <limits.h> would have given us this, but
88 * not on some systems (e.g. GNU/Hurd).
110 #ifndef STRIP_EXTENSION
111 #define STRIP_EXTENSION ""
114 #ifndef has_dos_drive_prefix
115 #define has_dos_drive_prefix(path) 0
119 #define is_dir_sep(c) ((c) == '/')
123 #define NORETURN __attribute__((__noreturn__))
126 #ifndef __attribute__
127 #define __attribute__(x)
131 /* General helper functions */
132 extern void usage(const char *err) NORETURN;
133 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
134 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
135 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
137 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
139 extern int prefixcmp(const char *str, const char *prefix);
140 extern time_t tm_to_time_t(const struct tm *tm);
142 static inline const char *skip_prefix(const char *str, const char *prefix)
144 size_t len = strlen(prefix);
145 return strncmp(str, prefix, len) ? NULL : str + len;
148 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
153 #define MAP_PRIVATE 1
154 #define MAP_FAILED ((void*)-1)
157 #define mmap git_mmap
158 #define munmap git_munmap
159 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
160 extern int git_munmap(void *start, size_t length);
162 #else /* NO_MMAP || USE_WIN32_MMAP */
164 #include <sys/mman.h>
166 #endif /* NO_MMAP || USE_WIN32_MMAP */
170 /* This value must be multiple of (pagesize * 2) */
171 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
175 /* This value must be multiple of (pagesize * 2) */
176 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
177 (sizeof(void*) >= 8 \
178 ? 1 * 1024 * 1024 * 1024 \
183 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
184 #define on_disk_bytes(st) ((st).st_size)
186 #define on_disk_bytes(st) ((st).st_blocks * 512)
189 #define DEFAULT_PACKED_GIT_LIMIT \
190 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
193 #define pread git_pread
194 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
197 * Forward decl that will remind us if its twin in cache.h changes.
198 * This function is used in compat/pread.c. But we can't include
201 extern ssize_t read_in_full(int fd, void *buf, size_t count);
204 #define setenv gitsetenv
205 extern int gitsetenv(const char *, const char *, int);
209 #define mkdtemp gitmkdtemp
210 extern char *gitmkdtemp(char *);
214 #define unsetenv gitunsetenv
215 extern void gitunsetenv(const char *);
219 #define strcasestr gitstrcasestr
220 extern char *gitstrcasestr(const char *haystack, const char *needle);
224 #define strlcpy gitstrlcpy
225 extern size_t gitstrlcpy(char *, const char *, size_t);
229 #define strtoumax gitstrtoumax
230 extern uintmax_t gitstrtoumax(const char *, char **, int);
234 #define hstrerror githstrerror
235 extern const char *githstrerror(int herror);
239 #define memmem gitmemmem
240 void *gitmemmem(const void *haystack, size_t haystacklen,
241 const void *needle, size_t needlelen);
244 #ifdef FREAD_READS_DIRECTORIES
248 #define fopen(a,b) git_fopen(a,b)
249 extern FILE *git_fopen(const char*, const char*);
252 #ifdef SNPRINTF_RETURNS_BOGUS
253 #define snprintf git_snprintf
254 extern int git_snprintf(char *str, size_t maxsize,
255 const char *format, ...);
256 #define vsnprintf git_vsnprintf
257 extern int git_vsnprintf(char *str, size_t maxsize,
258 const char *format, va_list ap);
261 #ifdef __GLIBC_PREREQ
262 #if __GLIBC_PREREQ(2, 1)
263 #define HAVE_STRCHRNUL
267 #ifndef HAVE_STRCHRNUL
268 #define strchrnul gitstrchrnul
269 static inline char *gitstrchrnul(const char *s, int c)
271 while (*s && *s != c)
280 extern char *xstrdup(const char *str);
281 extern void *xmalloc(size_t size);
282 extern void *xmemdupz(const void *data, size_t len);
283 extern char *xstrndup(const char *str, size_t len);
284 extern void *xrealloc(void *ptr, size_t size);
285 extern void *xcalloc(size_t nmemb, size_t size);
286 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
287 extern ssize_t xread(int fd, void *buf, size_t len);
288 extern ssize_t xwrite(int fd, const void *buf, size_t len);
289 extern int xdup(int fd);
290 extern FILE *xfdopen(int fd, const char *mode);
291 extern int xmkstemp(char *template);
293 static inline size_t xsize_t(off_t len)
298 static inline int has_extension(const char *filename, const char *ext)
300 size_t len = strlen(filename);
301 size_t extlen = strlen(ext);
302 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
305 /* Sane ctype - no locale, and works with signed chars */
314 extern unsigned char sane_ctype[256];
315 #define GIT_SPACE 0x01
316 #define GIT_DIGIT 0x02
317 #define GIT_ALPHA 0x04
318 #define GIT_GLOB_SPECIAL 0x08
319 #define GIT_REGEX_SPECIAL 0x10
320 #define GIT_PRINT_EXTRA 0x20
321 #define GIT_PRINT 0x3E
322 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
323 #define isascii(x) (((x) & ~0x7f) == 0)
324 #define isspace(x) sane_istest(x,GIT_SPACE)
325 #define isdigit(x) sane_istest(x,GIT_DIGIT)
326 #define isalpha(x) sane_istest(x,GIT_ALPHA)
327 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
328 #define isprint(x) sane_istest(x,GIT_PRINT)
329 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
330 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
331 #define tolower(x) sane_case((unsigned char)(x), 0x20)
332 #define toupper(x) sane_case((unsigned char)(x), 0)
334 static inline int sane_case(int x, int high)
336 if (sane_istest(x, GIT_ALPHA))
337 x = (x & ~0x20) | high;
341 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
347 ul = strtoul(s, &p, base);
348 if (errno || *p || p == s || (unsigned int) ul != ul)
354 static inline int strtol_i(char const *s, int base, int *result)
360 ul = strtol(s, &p, base);
361 if (errno || *p || p == s || (int) ul != ul)
367 #ifdef INTERNAL_QSORT
368 void git_qsort(void *base, size_t nmemb, size_t size,
369 int(*compar)(const void *, const void *));
370 #define qsort git_qsort
373 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
374 # define FORCE_DIR_SET_GID S_ISGID
376 # define FORCE_DIR_SET_GID 0
381 #define ST_CTIME_NSEC(st) 0
382 #define ST_MTIME_NSEC(st) 0
384 #ifdef USE_ST_TIMESPEC
385 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
386 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
388 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
389 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))