1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
7 #if defined(__GNUC__) && (__GNUC__ < 3)
10 #define FLEX_ARRAY /* empty */
14 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
17 #define TYPEOF(x) (__typeof__(x))
22 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
24 /* Approximation of the length of the decimal representation of this type. */
25 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
27 #if !defined(__APPLE__) && !defined(__FreeBSD__)
28 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
29 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
45 #include <sys/param.h>
46 #include <sys/types.h>
54 #include <sys/socket.h>
57 #include <netinet/in.h>
58 #include <netinet/tcp.h>
59 #include <arpa/inet.h>
63 #if defined(__CYGWIN__)
66 #define _XOPEN_SOURCE 600
68 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
77 /* On most systems <limits.h> would have given us this, but
78 * not on some systems (e.g. GNU/Hurd).
89 #define NORETURN __attribute__((__noreturn__))
93 #define __attribute__(x)
97 /* General helper functions */
98 extern void usage(const char *err) NORETURN;
99 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
100 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
101 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
103 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
104 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
105 extern void set_error_routine(void (*routine)(const char *err, va_list params));
106 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
113 #define MAP_PRIVATE 1
114 #define MAP_FAILED ((void*)-1)
117 #define mmap git_mmap
118 #define munmap git_munmap
119 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
120 extern int git_munmap(void *start, size_t length);
122 /* This value must be multiple of (pagesize * 2) */
123 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
127 #include <sys/mman.h>
129 /* This value must be multiple of (pagesize * 2) */
130 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
131 (sizeof(void*) >= 8 \
132 ? 1 * 1024 * 1024 * 1024 \
137 #define DEFAULT_PACKED_GIT_LIMIT \
138 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
141 #define pread git_pread
142 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
146 #define setenv gitsetenv
147 extern int gitsetenv(const char *, const char *, int);
151 #define unsetenv gitunsetenv
152 extern void gitunsetenv(const char *);
156 #define strcasestr gitstrcasestr
157 extern char *gitstrcasestr(const char *haystack, const char *needle);
161 #define strlcpy gitstrlcpy
162 extern size_t gitstrlcpy(char *, const char *, size_t);
166 #define strtoumax gitstrtoumax
167 extern uintmax_t gitstrtoumax(const char *, char **, int);
170 extern void release_pack_memory(size_t, int);
172 static inline char* xstrdup(const char *str)
174 char *ret = strdup(str);
176 release_pack_memory(strlen(str) + 1, -1);
179 die("Out of memory, strdup failed");
184 static inline void *xmalloc(size_t size)
186 void *ret = malloc(size);
190 release_pack_memory(size, -1);
195 die("Out of memory, malloc failed");
197 #ifdef XMALLOC_POISON
198 memset(ret, 0xA5, size);
203 static inline char *xstrndup(const char *str, size_t len)
207 p = memchr(str, '\0', len);
210 p = xmalloc(len + 1);
216 static inline void *xrealloc(void *ptr, size_t size)
218 void *ret = realloc(ptr, size);
220 ret = realloc(ptr, 1);
222 release_pack_memory(size, -1);
223 ret = realloc(ptr, size);
225 ret = realloc(ptr, 1);
227 die("Out of memory, realloc failed");
232 static inline void *xcalloc(size_t nmemb, size_t size)
234 void *ret = calloc(nmemb, size);
235 if (!ret && (!nmemb || !size))
238 release_pack_memory(nmemb * size, -1);
239 ret = calloc(nmemb, size);
240 if (!ret && (!nmemb || !size))
243 die("Out of memory, calloc failed");
248 static inline void *xmmap(void *start, size_t length,
249 int prot, int flags, int fd, off_t offset)
251 void *ret = mmap(start, length, prot, flags, fd, offset);
252 if (ret == MAP_FAILED) {
255 release_pack_memory(length, fd);
256 ret = mmap(start, length, prot, flags, fd, offset);
257 if (ret == MAP_FAILED)
258 die("Out of memory? mmap failed: %s", strerror(errno));
263 static inline ssize_t xread(int fd, void *buf, size_t len)
267 nr = read(fd, buf, len);
268 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
274 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
278 nr = write(fd, buf, len);
279 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
285 static inline size_t xsize_t(off_t len)
290 static inline int has_extension(const char *filename, const char *ext)
292 size_t len = strlen(filename);
293 size_t extlen = strlen(ext);
294 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
297 /* Sane ctype - no locale, and works with signed chars */
304 extern unsigned char sane_ctype[256];
305 #define GIT_SPACE 0x01
306 #define GIT_DIGIT 0x02
307 #define GIT_ALPHA 0x04
308 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
309 #define isspace(x) sane_istest(x,GIT_SPACE)
310 #define isdigit(x) sane_istest(x,GIT_DIGIT)
311 #define isalpha(x) sane_istest(x,GIT_ALPHA)
312 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
313 #define tolower(x) sane_case((unsigned char)(x), 0x20)
314 #define toupper(x) sane_case((unsigned char)(x), 0)
316 static inline int sane_case(int x, int high)
318 if (sane_istest(x, GIT_ALPHA))
319 x = (x & ~0x20) | high;
323 static inline int prefixcmp(const char *str, const char *prefix)
325 return strncmp(str, prefix, strlen(prefix));
328 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
334 ul = strtoul(s, &p, base);
335 if (errno || *p || p == s || (unsigned int) ul != ul)