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 extern const char *graph_line;
88 extern const char *graph_dotted_line;
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 #include "../../../include/linux/stringify.h"
142 #define DIE_IF(cnd) \
144 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
145 __stringify(cnd) "\n"); \
149 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
151 extern int prefixcmp(const char *str, const char *prefix);
152 extern time_t tm_to_time_t(const struct tm *tm);
154 static inline const char *skip_prefix(const char *str, const char *prefix)
156 size_t len = strlen(prefix);
157 return strncmp(str, prefix, len) ? NULL : str + len;
160 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
165 #define MAP_PRIVATE 1
166 #define MAP_FAILED ((void*)-1)
169 #define mmap git_mmap
170 #define munmap git_munmap
171 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
172 extern int git_munmap(void *start, size_t length);
174 #else /* NO_MMAP || USE_WIN32_MMAP */
176 #include <sys/mman.h>
178 #endif /* NO_MMAP || USE_WIN32_MMAP */
182 /* This value must be multiple of (pagesize * 2) */
183 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
187 /* This value must be multiple of (pagesize * 2) */
188 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
189 (sizeof(void*) >= 8 \
190 ? 1 * 1024 * 1024 * 1024 \
195 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
196 #define on_disk_bytes(st) ((st).st_size)
198 #define on_disk_bytes(st) ((st).st_blocks * 512)
201 #define DEFAULT_PACKED_GIT_LIMIT \
202 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
205 #define pread git_pread
206 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
209 * Forward decl that will remind us if its twin in cache.h changes.
210 * This function is used in compat/pread.c. But we can't include
213 extern ssize_t read_in_full(int fd, void *buf, size_t count);
216 #define setenv gitsetenv
217 extern int gitsetenv(const char *, const char *, int);
221 #define mkdtemp gitmkdtemp
222 extern char *gitmkdtemp(char *);
226 #define unsetenv gitunsetenv
227 extern void gitunsetenv(const char *);
231 #define strcasestr gitstrcasestr
232 extern char *gitstrcasestr(const char *haystack, const char *needle);
236 #define strlcpy gitstrlcpy
237 extern size_t gitstrlcpy(char *, const char *, size_t);
241 #define strtoumax gitstrtoumax
242 extern uintmax_t gitstrtoumax(const char *, char **, int);
246 #define hstrerror githstrerror
247 extern const char *githstrerror(int herror);
251 #define memmem gitmemmem
252 void *gitmemmem(const void *haystack, size_t haystacklen,
253 const void *needle, size_t needlelen);
256 #ifdef FREAD_READS_DIRECTORIES
260 #define fopen(a,b) git_fopen(a,b)
261 extern FILE *git_fopen(const char*, const char*);
264 #ifdef SNPRINTF_RETURNS_BOGUS
265 #define snprintf git_snprintf
266 extern int git_snprintf(char *str, size_t maxsize,
267 const char *format, ...);
268 #define vsnprintf git_vsnprintf
269 extern int git_vsnprintf(char *str, size_t maxsize,
270 const char *format, va_list ap);
273 #ifdef __GLIBC_PREREQ
274 #if __GLIBC_PREREQ(2, 1)
275 #define HAVE_STRCHRNUL
279 #ifndef HAVE_STRCHRNUL
280 #define strchrnul gitstrchrnul
281 static inline char *gitstrchrnul(const char *s, int c)
283 while (*s && *s != c)
292 extern char *xstrdup(const char *str);
293 extern void *xmalloc(size_t size) __attribute__((weak));
294 extern void *xmemdupz(const void *data, size_t len);
295 extern char *xstrndup(const char *str, size_t len);
296 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
298 static inline void *zalloc(size_t size)
300 return calloc(1, size);
303 static inline size_t xsize_t(off_t len)
308 static inline int has_extension(const char *filename, const char *ext)
310 size_t len = strlen(filename);
311 size_t extlen = strlen(ext);
312 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
315 /* Sane ctype - no locale, and works with signed chars */
325 extern unsigned char sane_ctype[256];
326 #define GIT_SPACE 0x01
327 #define GIT_DIGIT 0x02
328 #define GIT_ALPHA 0x04
329 #define GIT_GLOB_SPECIAL 0x08
330 #define GIT_REGEX_SPECIAL 0x10
331 #define GIT_PRINT_EXTRA 0x20
332 #define GIT_PRINT 0x3E
333 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
334 #define isascii(x) (((x) & ~0x7f) == 0)
335 #define isspace(x) sane_istest(x,GIT_SPACE)
336 #define isdigit(x) sane_istest(x,GIT_DIGIT)
337 #define isxdigit(x) \
338 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
339 #define isalpha(x) sane_istest(x,GIT_ALPHA)
340 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
341 #define isprint(x) sane_istest(x,GIT_PRINT)
342 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
343 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
344 #define tolower(x) sane_case((unsigned char)(x), 0x20)
345 #define toupper(x) sane_case((unsigned char)(x), 0)
347 static inline int sane_case(int x, int high)
349 if (sane_istest(x, GIT_ALPHA))
350 x = (x & ~0x20) | high;
354 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
360 ul = strtoul(s, &p, base);
361 if (errno || *p || p == s || (unsigned int) ul != ul)
367 static inline int strtol_i(char const *s, int base, int *result)
373 ul = strtol(s, &p, base);
374 if (errno || *p || p == s || (int) ul != ul)
380 #ifdef INTERNAL_QSORT
381 void git_qsort(void *base, size_t nmemb, size_t size,
382 int(*compar)(const void *, const void *));
383 #define qsort git_qsort
386 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
387 # define FORCE_DIR_SET_GID S_ISGID
389 # define FORCE_DIR_SET_GID 0
394 #define ST_CTIME_NSEC(st) 0
395 #define ST_MTIME_NSEC(st) 0
397 #ifdef USE_ST_TIMESPEC
398 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
399 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
401 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
402 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))