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"
90 /* On most systems <limits.h> would have given us this, but
91 * not on some systems (e.g. GNU/Hurd).
113 #ifndef STRIP_EXTENSION
114 #define STRIP_EXTENSION ""
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_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
142 extern int prefixcmp(const char *str, const char *prefix);
143 extern time_t tm_to_time_t(const struct tm *tm);
145 static inline const char *skip_prefix(const char *str, const char *prefix)
147 size_t len = strlen(prefix);
148 return strncmp(str, prefix, len) ? NULL : str + len;
151 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
156 #define MAP_PRIVATE 1
157 #define MAP_FAILED ((void*)-1)
160 #define mmap git_mmap
161 #define munmap git_munmap
162 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
163 extern int git_munmap(void *start, size_t length);
165 #else /* NO_MMAP || USE_WIN32_MMAP */
167 #include <sys/mman.h>
169 #endif /* NO_MMAP || USE_WIN32_MMAP */
173 /* This value must be multiple of (pagesize * 2) */
174 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
178 /* This value must be multiple of (pagesize * 2) */
179 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
180 (sizeof(void*) >= 8 \
181 ? 1 * 1024 * 1024 * 1024 \
186 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
187 #define on_disk_bytes(st) ((st).st_size)
189 #define on_disk_bytes(st) ((st).st_blocks * 512)
192 #define DEFAULT_PACKED_GIT_LIMIT \
193 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
196 #define pread git_pread
197 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
200 * Forward decl that will remind us if its twin in cache.h changes.
201 * This function is used in compat/pread.c. But we can't include
204 extern ssize_t read_in_full(int fd, void *buf, size_t count);
207 #define setenv gitsetenv
208 extern int gitsetenv(const char *, const char *, int);
212 #define mkdtemp gitmkdtemp
213 extern char *gitmkdtemp(char *);
217 #define unsetenv gitunsetenv
218 extern void gitunsetenv(const char *);
222 #define strcasestr gitstrcasestr
223 extern char *gitstrcasestr(const char *haystack, const char *needle);
227 #define strlcpy gitstrlcpy
228 extern size_t gitstrlcpy(char *, const char *, size_t);
232 #define strtoumax gitstrtoumax
233 extern uintmax_t gitstrtoumax(const char *, char **, int);
237 #define hstrerror githstrerror
238 extern const char *githstrerror(int herror);
242 #define memmem gitmemmem
243 void *gitmemmem(const void *haystack, size_t haystacklen,
244 const void *needle, size_t needlelen);
247 #ifdef FREAD_READS_DIRECTORIES
251 #define fopen(a,b) git_fopen(a,b)
252 extern FILE *git_fopen(const char*, const char*);
255 #ifdef SNPRINTF_RETURNS_BOGUS
256 #define snprintf git_snprintf
257 extern int git_snprintf(char *str, size_t maxsize,
258 const char *format, ...);
259 #define vsnprintf git_vsnprintf
260 extern int git_vsnprintf(char *str, size_t maxsize,
261 const char *format, va_list ap);
264 #ifdef __GLIBC_PREREQ
265 #if __GLIBC_PREREQ(2, 1)
266 #define HAVE_STRCHRNUL
270 #ifndef HAVE_STRCHRNUL
271 #define strchrnul gitstrchrnul
272 static inline char *gitstrchrnul(const char *s, int c)
274 while (*s && *s != c)
283 extern char *xstrdup(const char *str);
284 extern void *xmalloc(size_t size);
285 extern void *xmemdupz(const void *data, size_t len);
286 extern char *xstrndup(const char *str, size_t len);
287 extern void *xrealloc(void *ptr, size_t size);
288 extern void *xcalloc(size_t nmemb, size_t size);
289 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
290 extern ssize_t xread(int fd, void *buf, size_t len);
291 extern ssize_t xwrite(int fd, const void *buf, size_t len);
292 extern int xdup(int fd);
293 extern FILE *xfdopen(int fd, const char *mode);
294 extern int xmkstemp(char *template);
296 static inline size_t xsize_t(off_t len)
301 static inline int has_extension(const char *filename, const char *ext)
303 size_t len = strlen(filename);
304 size_t extlen = strlen(ext);
305 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
308 /* Sane ctype - no locale, and works with signed chars */
316 extern unsigned char sane_ctype[256];
317 #define GIT_SPACE 0x01
318 #define GIT_DIGIT 0x02
319 #define GIT_ALPHA 0x04
320 #define GIT_GLOB_SPECIAL 0x08
321 #define GIT_REGEX_SPECIAL 0x10
322 #define GIT_PRINT_EXTRA 0x20
323 #define GIT_PRINT 0x3E
324 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
325 #define isascii(x) (((x) & ~0x7f) == 0)
326 #define isspace(x) sane_istest(x,GIT_SPACE)
327 #define isdigit(x) sane_istest(x,GIT_DIGIT)
328 #define isalpha(x) sane_istest(x,GIT_ALPHA)
329 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
330 #define isprint(x) sane_istest(x,GIT_PRINT)
331 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
332 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
333 #define tolower(x) sane_case((unsigned char)(x), 0x20)
334 #define toupper(x) sane_case((unsigned char)(x), 0)
336 static inline int sane_case(int x, int high)
338 if (sane_istest(x, GIT_ALPHA))
339 x = (x & ~0x20) | high;
343 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
349 ul = strtoul(s, &p, base);
350 if (errno || *p || p == s || (unsigned int) ul != ul)
356 static inline int strtol_i(char const *s, int base, int *result)
362 ul = strtol(s, &p, base);
363 if (errno || *p || p == s || (int) ul != ul)
369 #ifdef INTERNAL_QSORT
370 void git_qsort(void *base, size_t nmemb, size_t size,
371 int(*compar)(const void *, const void *));
372 #define qsort git_qsort
375 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
376 # define FORCE_DIR_SET_GID S_ISGID
378 # define FORCE_DIR_SET_GID 0
383 #define ST_CTIME_NSEC(st) 0
384 #define ST_MTIME_NSEC(st) 0
386 #ifdef USE_ST_TIMESPEC
387 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
388 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
390 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
391 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))