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 \
101 (sizeof(void*) >= 8 \
102 ? 1 * 1024 * 1024 * 1024 \
107 #define DEFAULT_PACKED_GIT_LIMIT \
108 (sizeof(void*) >= 8 \
109 ? 8 * 1024 * 1024 * 1024 \
113 #define setenv gitsetenv
114 extern int gitsetenv(const char *, const char *, int);
118 #define unsetenv gitunsetenv
119 extern void gitunsetenv(const char *);
123 #define strcasestr gitstrcasestr
124 extern char *gitstrcasestr(const char *haystack, const char *needle);
128 #define strlcpy gitstrlcpy
129 extern size_t gitstrlcpy(char *, const char *, size_t);
132 extern void release_pack_memory(size_t);
134 static inline char* xstrdup(const char *str)
136 char *ret = strdup(str);
138 release_pack_memory(strlen(str) + 1);
141 die("Out of memory, strdup failed");
146 static inline void *xmalloc(size_t size)
148 void *ret = malloc(size);
152 release_pack_memory(size);
157 die("Out of memory, malloc failed");
159 #ifdef XMALLOC_POISON
160 memset(ret, 0xA5, size);
165 static inline void *xrealloc(void *ptr, size_t size)
167 void *ret = realloc(ptr, size);
169 ret = realloc(ptr, 1);
171 release_pack_memory(size);
172 ret = realloc(ptr, size);
174 ret = realloc(ptr, 1);
176 die("Out of memory, realloc failed");
181 static inline void *xcalloc(size_t nmemb, size_t size)
183 void *ret = calloc(nmemb, size);
184 if (!ret && (!nmemb || !size))
187 release_pack_memory(nmemb * size);
188 ret = calloc(nmemb, size);
189 if (!ret && (!nmemb || !size))
192 die("Out of memory, calloc failed");
197 static inline void *xmmap(void *start, size_t length,
198 int prot, int flags, int fd, off_t offset)
200 void *ret = mmap(start, length, prot, flags, fd, offset);
201 if (ret == MAP_FAILED) {
202 release_pack_memory(length);
203 ret = mmap(start, length, prot, flags, fd, offset);
204 if (ret == MAP_FAILED)
205 die("Out of memory? mmap failed: %s", strerror(errno));
210 static inline ssize_t xread(int fd, void *buf, size_t len)
214 nr = read(fd, buf, len);
215 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
221 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
225 nr = write(fd, buf, len);
226 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
232 static inline int has_extension(const char *filename, const char *ext)
234 size_t len = strlen(filename);
235 size_t extlen = strlen(ext);
236 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
239 /* Sane ctype - no locale, and works with signed chars */
246 extern unsigned char sane_ctype[256];
247 #define GIT_SPACE 0x01
248 #define GIT_DIGIT 0x02
249 #define GIT_ALPHA 0x04
250 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
251 #define isspace(x) sane_istest(x,GIT_SPACE)
252 #define isdigit(x) sane_istest(x,GIT_DIGIT)
253 #define isalpha(x) sane_istest(x,GIT_ALPHA)
254 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
255 #define tolower(x) sane_case((unsigned char)(x), 0x20)
256 #define toupper(x) sane_case((unsigned char)(x), 0)
258 static inline int sane_case(int x, int high)
260 if (sane_istest(x, GIT_ALPHA))
261 x = (x & ~0x20) | high;