1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
5 #if defined(__GNUC__) && (__GNUC__ < 3)
8 #define FLEX_ARRAY /* empty */
12 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
14 #if !defined(__APPLE__) && !defined(__FreeBSD__)
15 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
16 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
31 #include <sys/param.h>
32 #include <sys/types.h>
40 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <netinet/tcp.h>
45 #include <arpa/inet.h>
54 /* On most systems <limits.h> would have given us this, but
55 * not on some systems (e.g. GNU/Hurd).
62 #define NORETURN __attribute__((__noreturn__))
66 #define __attribute__(x)
70 /* General helper functions */
71 extern void usage(const char *err) NORETURN;
72 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
73 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
74 extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
76 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
77 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
78 extern void set_error_routine(void (*routine)(const char *err, va_list params));
79 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
87 #define MAP_FAILED ((void*)-1)
91 #define munmap git_munmap
92 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
93 extern int git_munmap(void *start, size_t length);
95 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
100 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (32 * 1024 * 1024)
104 #define DEFAULT_PACKED_GIT_LIMIT (256 * 1024 * 1024)
107 #define setenv gitsetenv
108 extern int gitsetenv(const char *, const char *, int);
112 #define unsetenv gitunsetenv
113 extern void gitunsetenv(const char *);
117 #define strcasestr gitstrcasestr
118 extern char *gitstrcasestr(const char *haystack, const char *needle);
122 #define strlcpy gitstrlcpy
123 extern size_t gitstrlcpy(char *, const char *, size_t);
126 extern void release_pack_memory(size_t);
128 static inline char* xstrdup(const char *str)
130 char *ret = strdup(str);
132 release_pack_memory(strlen(str) + 1);
135 die("Out of memory, strdup failed");
140 static inline void *xmalloc(size_t size)
142 void *ret = malloc(size);
146 release_pack_memory(size);
151 die("Out of memory, malloc failed");
153 #ifdef XMALLOC_POISON
154 memset(ret, 0xA5, size);
159 static inline void *xrealloc(void *ptr, size_t size)
161 void *ret = realloc(ptr, size);
163 ret = realloc(ptr, 1);
165 release_pack_memory(size);
166 ret = realloc(ptr, size);
168 ret = realloc(ptr, 1);
170 die("Out of memory, realloc failed");
175 static inline void *xcalloc(size_t nmemb, size_t size)
177 void *ret = calloc(nmemb, size);
178 if (!ret && (!nmemb || !size))
181 release_pack_memory(nmemb * size);
182 ret = calloc(nmemb, size);
183 if (!ret && (!nmemb || !size))
186 die("Out of memory, calloc failed");
191 static inline void *xmmap(void *start, size_t length,
192 int prot, int flags, int fd, off_t offset)
194 void *ret = mmap(start, length, prot, flags, fd, offset);
195 if (ret == MAP_FAILED) {
196 release_pack_memory(length);
197 ret = mmap(start, length, prot, flags, fd, offset);
198 if (ret == MAP_FAILED)
199 die("Out of memory? mmap failed: %s", strerror(errno));
204 static inline ssize_t xread(int fd, void *buf, size_t len)
208 nr = read(fd, buf, len);
209 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
215 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
219 nr = write(fd, buf, len);
220 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
226 static inline int has_extension(const char *filename, const char *ext)
228 size_t len = strlen(filename);
229 size_t extlen = strlen(ext);
230 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
233 /* Sane ctype - no locale, and works with signed chars */
240 extern unsigned char sane_ctype[256];
241 #define GIT_SPACE 0x01
242 #define GIT_DIGIT 0x02
243 #define GIT_ALPHA 0x04
244 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
245 #define isspace(x) sane_istest(x,GIT_SPACE)
246 #define isdigit(x) sane_istest(x,GIT_DIGIT)
247 #define isalpha(x) sane_istest(x,GIT_ALPHA)
248 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
249 #define tolower(x) sane_case((unsigned char)(x), 0x20)
250 #define toupper(x) sane_case((unsigned char)(x), 0)
252 static inline int sane_case(int x, int high)
254 if (sane_istest(x, GIT_ALPHA))
255 x = (x & ~0x20) | high;