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 #if !defined(__APPLE__) && !defined(__FreeBSD__)
25 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
26 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
42 #include <sys/param.h>
43 #include <sys/types.h>
51 #include <sys/socket.h>
54 #include <netinet/in.h>
55 #include <netinet/tcp.h>
56 #include <arpa/inet.h>
60 #if defined(__CYGWIN__)
63 #define _XOPEN_SOURCE 600
65 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
74 /* On most systems <limits.h> would have given us this, but
75 * not on some systems (e.g. GNU/Hurd).
86 #define NORETURN __attribute__((__noreturn__))
90 #define __attribute__(x)
94 /* General helper functions */
95 extern void usage(const char *err) NORETURN;
96 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
97 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
98 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
100 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
101 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
102 extern void set_error_routine(void (*routine)(const char *err, va_list params));
103 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
110 #define MAP_PRIVATE 1
111 #define MAP_FAILED ((void*)-1)
114 #define mmap git_mmap
115 #define munmap git_munmap
116 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
117 extern int git_munmap(void *start, size_t length);
119 /* This value must be multiple of (pagesize * 2) */
120 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
124 #include <sys/mman.h>
126 /* This value must be multiple of (pagesize * 2) */
127 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
128 (sizeof(void*) >= 8 \
129 ? 1 * 1024 * 1024 * 1024 \
134 #define DEFAULT_PACKED_GIT_LIMIT \
135 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
138 #define pread git_pread
139 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
143 #define setenv gitsetenv
144 extern int gitsetenv(const char *, const char *, int);
148 #define unsetenv gitunsetenv
149 extern void gitunsetenv(const char *);
153 #define strcasestr gitstrcasestr
154 extern char *gitstrcasestr(const char *haystack, const char *needle);
158 #define strlcpy gitstrlcpy
159 extern size_t gitstrlcpy(char *, const char *, size_t);
163 #define strtoumax gitstrtoumax
164 extern uintmax_t gitstrtoumax(const char *, char **, int);
167 extern void release_pack_memory(size_t, int);
169 static inline char* xstrdup(const char *str)
171 char *ret = strdup(str);
173 release_pack_memory(strlen(str) + 1, -1);
176 die("Out of memory, strdup failed");
181 static inline void *xmalloc(size_t size)
183 void *ret = malloc(size);
187 release_pack_memory(size, -1);
192 die("Out of memory, malloc failed");
194 #ifdef XMALLOC_POISON
195 memset(ret, 0xA5, size);
200 static inline void *xrealloc(void *ptr, size_t size)
202 void *ret = realloc(ptr, size);
204 ret = realloc(ptr, 1);
206 release_pack_memory(size, -1);
207 ret = realloc(ptr, size);
209 ret = realloc(ptr, 1);
211 die("Out of memory, realloc failed");
216 static inline void *xcalloc(size_t nmemb, size_t size)
218 void *ret = calloc(nmemb, size);
219 if (!ret && (!nmemb || !size))
222 release_pack_memory(nmemb * size, -1);
223 ret = calloc(nmemb, size);
224 if (!ret && (!nmemb || !size))
227 die("Out of memory, calloc failed");
232 static inline void *xmmap(void *start, size_t length,
233 int prot, int flags, int fd, off_t offset)
235 void *ret = mmap(start, length, prot, flags, fd, offset);
236 if (ret == MAP_FAILED) {
239 release_pack_memory(length, fd);
240 ret = mmap(start, length, prot, flags, fd, offset);
241 if (ret == MAP_FAILED)
242 die("Out of memory? mmap failed: %s", strerror(errno));
247 static inline ssize_t xread(int fd, void *buf, size_t len)
251 nr = read(fd, buf, len);
252 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
258 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
262 nr = write(fd, buf, len);
263 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
269 static inline size_t xsize_t(off_t len)
274 static inline int has_extension(const char *filename, const char *ext)
276 size_t len = strlen(filename);
277 size_t extlen = strlen(ext);
278 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
281 /* Sane ctype - no locale, and works with signed chars */
288 extern unsigned char sane_ctype[256];
289 #define GIT_SPACE 0x01
290 #define GIT_DIGIT 0x02
291 #define GIT_ALPHA 0x04
292 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
293 #define isspace(x) sane_istest(x,GIT_SPACE)
294 #define isdigit(x) sane_istest(x,GIT_DIGIT)
295 #define isalpha(x) sane_istest(x,GIT_ALPHA)
296 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
297 #define tolower(x) sane_case((unsigned char)(x), 0x20)
298 #define toupper(x) sane_case((unsigned char)(x), 0)
300 static inline int sane_case(int x, int high)
302 if (sane_istest(x, GIT_ALPHA))
303 x = (x & ~0x20) | high;
307 static inline int prefixcmp(const char *str, const char *prefix)
309 return strncmp(str, prefix, strlen(prefix));
312 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
318 ul = strtoul(s, &p, base);
319 if (errno || *p || p == s || (unsigned int) ul != ul)