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]))
16 /* Approximation of the length of the decimal representation of this type. */
17 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
19 #if !defined(__APPLE__) && !defined(__FreeBSD__)
20 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
21 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
37 #include <sys/param.h>
38 #include <sys/types.h>
46 #include <sys/socket.h>
49 #include <netinet/in.h>
50 #include <netinet/tcp.h>
51 #include <arpa/inet.h>
55 #if defined(__CYGWIN__)
58 #define _XOPEN_SOURCE 600
60 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
69 /* On most systems <limits.h> would have given us this, but
70 * not on some systems (e.g. GNU/Hurd).
81 #define NORETURN __attribute__((__noreturn__))
85 #define __attribute__(x)
89 /* General helper functions */
90 extern void usage(const char *err) NORETURN;
91 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
92 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
93 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
95 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
96 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
97 extern void set_error_routine(void (*routine)(const char *err, va_list params));
98 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
105 #define MAP_PRIVATE 1
106 #define MAP_FAILED ((void*)-1)
109 #define mmap git_mmap
110 #define munmap git_munmap
111 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
112 extern int git_munmap(void *start, size_t length);
114 /* This value must be multiple of (pagesize * 2) */
115 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
119 #include <sys/mman.h>
121 /* This value must be multiple of (pagesize * 2) */
122 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
123 (sizeof(void*) >= 8 \
124 ? 1 * 1024 * 1024 * 1024 \
129 #define DEFAULT_PACKED_GIT_LIMIT \
130 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
133 #define pread git_pread
134 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
138 #define setenv gitsetenv
139 extern int gitsetenv(const char *, const char *, int);
143 #define unsetenv gitunsetenv
144 extern void gitunsetenv(const char *);
148 #define strcasestr gitstrcasestr
149 extern char *gitstrcasestr(const char *haystack, const char *needle);
153 #define strlcpy gitstrlcpy
154 extern size_t gitstrlcpy(char *, const char *, size_t);
158 #define strtoumax gitstrtoumax
159 extern uintmax_t gitstrtoumax(const char *, char **, int);
162 extern void release_pack_memory(size_t, int);
164 static inline char* xstrdup(const char *str)
166 char *ret = strdup(str);
168 release_pack_memory(strlen(str) + 1, -1);
171 die("Out of memory, strdup failed");
176 static inline void *xmalloc(size_t size)
178 void *ret = malloc(size);
182 release_pack_memory(size, -1);
187 die("Out of memory, malloc failed");
189 #ifdef XMALLOC_POISON
190 memset(ret, 0xA5, size);
195 static inline char *xstrndup(const char *str, size_t len)
199 p = memchr(str, '\0', len);
202 p = xmalloc(len + 1);
208 static inline void *xrealloc(void *ptr, size_t size)
210 void *ret = realloc(ptr, size);
212 ret = realloc(ptr, 1);
214 release_pack_memory(size, -1);
215 ret = realloc(ptr, size);
217 ret = realloc(ptr, 1);
219 die("Out of memory, realloc failed");
224 static inline void *xcalloc(size_t nmemb, size_t size)
226 void *ret = calloc(nmemb, size);
227 if (!ret && (!nmemb || !size))
230 release_pack_memory(nmemb * size, -1);
231 ret = calloc(nmemb, size);
232 if (!ret && (!nmemb || !size))
235 die("Out of memory, calloc failed");
240 static inline void *xmmap(void *start, size_t length,
241 int prot, int flags, int fd, off_t offset)
243 void *ret = mmap(start, length, prot, flags, fd, offset);
244 if (ret == MAP_FAILED) {
247 release_pack_memory(length, fd);
248 ret = mmap(start, length, prot, flags, fd, offset);
249 if (ret == MAP_FAILED)
250 die("Out of memory? mmap failed: %s", strerror(errno));
255 static inline ssize_t xread(int fd, void *buf, size_t len)
259 nr = read(fd, buf, len);
260 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
266 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
270 nr = write(fd, buf, len);
271 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
277 static inline size_t xsize_t(off_t len)
282 static inline int has_extension(const char *filename, const char *ext)
284 size_t len = strlen(filename);
285 size_t extlen = strlen(ext);
286 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
289 /* Sane ctype - no locale, and works with signed chars */
296 extern unsigned char sane_ctype[256];
297 #define GIT_SPACE 0x01
298 #define GIT_DIGIT 0x02
299 #define GIT_ALPHA 0x04
300 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
301 #define isspace(x) sane_istest(x,GIT_SPACE)
302 #define isdigit(x) sane_istest(x,GIT_DIGIT)
303 #define isalpha(x) sane_istest(x,GIT_ALPHA)
304 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
305 #define tolower(x) sane_case((unsigned char)(x), 0x20)
306 #define toupper(x) sane_case((unsigned char)(x), 0)
308 static inline int sane_case(int x, int high)
310 if (sane_istest(x, GIT_ALPHA))
311 x = (x & ~0x20) | high;
315 static inline int prefixcmp(const char *str, const char *prefix)
317 return strncmp(str, prefix, strlen(prefix));
320 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
326 ul = strtoul(s, &p, base);
327 if (errno || *p || p == s || (unsigned int) ul != ul)