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)
50 #include <sys/statfs.h>
59 #include <sys/param.h>
60 #include <sys/types.h>
71 #include <sys/socket.h>
72 #include <sys/ioctl.h>
73 #ifndef NO_SYS_SELECT_H
74 #include <sys/select.h>
76 #include <netinet/in.h>
77 #include <netinet/tcp.h>
78 #include <arpa/inet.h>
82 #include "../../../include/linux/magic.h"
90 extern const char *graph_line;
91 extern const char *graph_dotted_line;
93 /* On most systems <limits.h> would have given us this, but
94 * not on some systems (e.g. GNU/Hurd).
101 #define PRIuMAX "llu"
116 #ifndef STRIP_EXTENSION
117 #define STRIP_EXTENSION ""
120 #ifndef has_dos_drive_prefix
121 #define has_dos_drive_prefix(path) 0
125 #define is_dir_sep(c) ((c) == '/')
129 #define NORETURN __attribute__((__noreturn__))
132 #ifndef __attribute__
133 #define __attribute__(x)
137 /* General helper functions */
138 extern void usage(const char *err) NORETURN;
139 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
140 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
141 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
143 #include "../../../include/linux/stringify.h"
145 #define DIE_IF(cnd) \
147 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
148 __stringify(cnd) "\n"); \
152 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
154 extern int prefixcmp(const char *str, const char *prefix);
155 extern time_t tm_to_time_t(const struct tm *tm);
157 static inline const char *skip_prefix(const char *str, const char *prefix)
159 size_t len = strlen(prefix);
160 return strncmp(str, prefix, len) ? NULL : str + len;
163 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
168 #define MAP_PRIVATE 1
169 #define MAP_FAILED ((void*)-1)
172 #define mmap git_mmap
173 #define munmap git_munmap
174 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
175 extern int git_munmap(void *start, size_t length);
177 #else /* NO_MMAP || USE_WIN32_MMAP */
179 #include <sys/mman.h>
181 #endif /* NO_MMAP || USE_WIN32_MMAP */
185 /* This value must be multiple of (pagesize * 2) */
186 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
190 /* This value must be multiple of (pagesize * 2) */
191 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
192 (sizeof(void*) >= 8 \
193 ? 1 * 1024 * 1024 * 1024 \
198 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
199 #define on_disk_bytes(st) ((st).st_size)
201 #define on_disk_bytes(st) ((st).st_blocks * 512)
204 #define DEFAULT_PACKED_GIT_LIMIT \
205 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
208 #define pread git_pread
209 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
212 * Forward decl that will remind us if its twin in cache.h changes.
213 * This function is used in compat/pread.c. But we can't include
216 extern ssize_t read_in_full(int fd, void *buf, size_t count);
219 #define setenv gitsetenv
220 extern int gitsetenv(const char *, const char *, int);
224 #define mkdtemp gitmkdtemp
225 extern char *gitmkdtemp(char *);
229 #define unsetenv gitunsetenv
230 extern void gitunsetenv(const char *);
234 #define strcasestr gitstrcasestr
235 extern char *gitstrcasestr(const char *haystack, const char *needle);
239 #define strlcpy gitstrlcpy
240 extern size_t gitstrlcpy(char *, const char *, size_t);
244 #define strtoumax gitstrtoumax
245 extern uintmax_t gitstrtoumax(const char *, char **, int);
249 #define hstrerror githstrerror
250 extern const char *githstrerror(int herror);
254 #define memmem gitmemmem
255 void *gitmemmem(const void *haystack, size_t haystacklen,
256 const void *needle, size_t needlelen);
259 #ifdef FREAD_READS_DIRECTORIES
263 #define fopen(a,b) git_fopen(a,b)
264 extern FILE *git_fopen(const char*, const char*);
267 #ifdef SNPRINTF_RETURNS_BOGUS
268 #define snprintf git_snprintf
269 extern int git_snprintf(char *str, size_t maxsize,
270 const char *format, ...);
271 #define vsnprintf git_vsnprintf
272 extern int git_vsnprintf(char *str, size_t maxsize,
273 const char *format, va_list ap);
276 #ifdef __GLIBC_PREREQ
277 #if __GLIBC_PREREQ(2, 1)
278 #define HAVE_STRCHRNUL
282 #ifndef HAVE_STRCHRNUL
283 #define strchrnul gitstrchrnul
284 static inline char *gitstrchrnul(const char *s, int c)
286 while (*s && *s != c)
295 extern char *xstrdup(const char *str);
296 extern void *xmalloc(size_t size) __attribute__((weak));
297 extern void *xmemdupz(const void *data, size_t len);
298 extern char *xstrndup(const char *str, size_t len);
299 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
301 static inline void *xzalloc(size_t size)
303 void *buf = xmalloc(size);
305 return memset(buf, 0, size);
308 static inline void *zalloc(size_t size)
310 return calloc(1, size);
313 static inline size_t xsize_t(off_t len)
318 static inline int has_extension(const char *filename, const char *ext)
320 size_t len = strlen(filename);
321 size_t extlen = strlen(ext);
323 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
326 /* Sane ctype - no locale, and works with signed chars */
337 extern unsigned char sane_ctype[256];
338 #define GIT_SPACE 0x01
339 #define GIT_DIGIT 0x02
340 #define GIT_ALPHA 0x04
341 #define GIT_GLOB_SPECIAL 0x08
342 #define GIT_REGEX_SPECIAL 0x10
343 #define GIT_PRINT_EXTRA 0x20
344 #define GIT_PRINT 0x3E
345 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
346 #define isascii(x) (((x) & ~0x7f) == 0)
347 #define isspace(x) sane_istest(x,GIT_SPACE)
348 #define isdigit(x) sane_istest(x,GIT_DIGIT)
349 #define isxdigit(x) \
350 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
351 #define isalpha(x) sane_istest(x,GIT_ALPHA)
352 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
353 #define isprint(x) sane_istest(x,GIT_PRINT)
354 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
355 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
356 #define tolower(x) sane_case((unsigned char)(x), 0x20)
357 #define toupper(x) sane_case((unsigned char)(x), 0)
359 static inline int sane_case(int x, int high)
361 if (sane_istest(x, GIT_ALPHA))
362 x = (x & ~0x20) | high;
366 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
372 ul = strtoul(s, &p, base);
373 if (errno || *p || p == s || (unsigned int) ul != ul)
379 static inline int strtol_i(char const *s, int base, int *result)
385 ul = strtol(s, &p, base);
386 if (errno || *p || p == s || (int) ul != ul)
392 #ifdef INTERNAL_QSORT
393 void git_qsort(void *base, size_t nmemb, size_t size,
394 int(*compar)(const void *, const void *));
395 #define qsort git_qsort
398 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
399 # define FORCE_DIR_SET_GID S_ISGID
401 # define FORCE_DIR_SET_GID 0
406 #define ST_CTIME_NSEC(st) 0
407 #define ST_MTIME_NSEC(st) 0
409 #ifdef USE_ST_TIMESPEC
410 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
411 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
413 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
414 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
418 int mkdir_p(char *path, mode_t mode);
419 int copyfile(const char *from, const char *to);
421 s64 perf_atoll(const char *str);
422 char **argv_split(const char *str, int *argcp);
423 void argv_free(char **argv);
424 bool strglobmatch(const char *str, const char *pat);
425 bool strlazymatch(const char *str, const char *pat);
426 unsigned long convert_unit(unsigned long value, char *unit);
429 #define STR(x) _STR(x)