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 */
60 #include <sys/param.h>
61 #include <sys/types.h>
72 #include <sys/socket.h>
73 #include <sys/ioctl.h>
74 #ifndef NO_SYS_SELECT_H
75 #include <sys/select.h>
77 #include <netinet/in.h>
78 #include <netinet/tcp.h>
79 #include <arpa/inet.h>
88 /* On most systems <limits.h> would have given us this, but
89 * not on some systems (e.g. GNU/Hurd).
111 #ifndef STRIP_EXTENSION
112 #define STRIP_EXTENSION ""
115 #ifndef has_dos_drive_prefix
116 #define has_dos_drive_prefix(path) 0
120 #define is_dir_sep(c) ((c) == '/')
124 #define NORETURN __attribute__((__noreturn__))
127 #ifndef __attribute__
128 #define __attribute__(x)
132 /* General helper functions */
133 extern void usage(const char *err) NORETURN;
134 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
135 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
136 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
138 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
140 extern int prefixcmp(const char *str, const char *prefix);
141 extern time_t tm_to_time_t(const struct tm *tm);
143 static inline const char *skip_prefix(const char *str, const char *prefix)
145 size_t len = strlen(prefix);
146 return strncmp(str, prefix, len) ? NULL : str + len;
149 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
154 #define MAP_PRIVATE 1
155 #define MAP_FAILED ((void*)-1)
158 #define mmap git_mmap
159 #define munmap git_munmap
160 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
161 extern int git_munmap(void *start, size_t length);
163 #else /* NO_MMAP || USE_WIN32_MMAP */
165 #include <sys/mman.h>
167 #endif /* NO_MMAP || USE_WIN32_MMAP */
171 /* This value must be multiple of (pagesize * 2) */
172 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
176 /* This value must be multiple of (pagesize * 2) */
177 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
178 (sizeof(void*) >= 8 \
179 ? 1 * 1024 * 1024 * 1024 \
184 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
185 #define on_disk_bytes(st) ((st).st_size)
187 #define on_disk_bytes(st) ((st).st_blocks * 512)
190 #define DEFAULT_PACKED_GIT_LIMIT \
191 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
194 #define pread git_pread
195 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
198 * Forward decl that will remind us if its twin in cache.h changes.
199 * This function is used in compat/pread.c. But we can't include
202 extern ssize_t read_in_full(int fd, void *buf, size_t count);
205 #define setenv gitsetenv
206 extern int gitsetenv(const char *, const char *, int);
210 #define mkdtemp gitmkdtemp
211 extern char *gitmkdtemp(char *);
215 #define unsetenv gitunsetenv
216 extern void gitunsetenv(const char *);
220 #define strcasestr gitstrcasestr
221 extern char *gitstrcasestr(const char *haystack, const char *needle);
225 #define strlcpy gitstrlcpy
226 extern size_t gitstrlcpy(char *, const char *, size_t);
230 #define strtoumax gitstrtoumax
231 extern uintmax_t gitstrtoumax(const char *, char **, int);
235 #define hstrerror githstrerror
236 extern const char *githstrerror(int herror);
240 #define memmem gitmemmem
241 void *gitmemmem(const void *haystack, size_t haystacklen,
242 const void *needle, size_t needlelen);
245 #ifdef FREAD_READS_DIRECTORIES
249 #define fopen(a,b) git_fopen(a,b)
250 extern FILE *git_fopen(const char*, const char*);
253 #ifdef SNPRINTF_RETURNS_BOGUS
254 #define snprintf git_snprintf
255 extern int git_snprintf(char *str, size_t maxsize,
256 const char *format, ...);
257 #define vsnprintf git_vsnprintf
258 extern int git_vsnprintf(char *str, size_t maxsize,
259 const char *format, va_list ap);
262 #ifdef __GLIBC_PREREQ
263 #if __GLIBC_PREREQ(2, 1)
264 #define HAVE_STRCHRNUL
268 #ifndef HAVE_STRCHRNUL
269 #define strchrnul gitstrchrnul
270 static inline char *gitstrchrnul(const char *s, int c)
272 while (*s && *s != c)
281 extern char *xstrdup(const char *str);
282 extern void *xmalloc(size_t size);
283 extern void *xmemdupz(const void *data, size_t len);
284 extern char *xstrndup(const char *str, size_t len);
285 extern void *xrealloc(void *ptr, size_t size);
286 extern void *xcalloc(size_t nmemb, size_t size);
287 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
288 extern ssize_t xread(int fd, void *buf, size_t len);
289 extern ssize_t xwrite(int fd, const void *buf, size_t len);
290 extern int xdup(int fd);
291 extern FILE *xfdopen(int fd, const char *mode);
292 extern int xmkstemp(char *template);
294 static inline size_t xsize_t(off_t len)
299 static inline int has_extension(const char *filename, const char *ext)
301 size_t len = strlen(filename);
302 size_t extlen = strlen(ext);
303 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
306 /* 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))