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 */
32 #include <sys/param.h>
33 #include <sys/types.h>
41 #include <sys/socket.h>
44 #include <netinet/in.h>
45 #include <netinet/tcp.h>
46 #include <arpa/inet.h>
50 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
58 /* On most systems <limits.h> would have given us this, but
59 * not on some systems (e.g. GNU/Hurd).
66 #define NORETURN __attribute__((__noreturn__))
70 #define __attribute__(x)
74 /* General helper functions */
75 extern void usage(const char *err) NORETURN;
76 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
77 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
78 extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
80 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
81 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
82 extern void set_error_routine(void (*routine)(const char *err, va_list params));
83 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
91 #define MAP_FAILED ((void*)-1)
95 #define munmap git_munmap
96 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
97 extern int git_munmap(void *start, size_t length);
99 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
103 #include <sys/mman.h>
104 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
105 (sizeof(void*) >= 8 \
106 ? 1 * 1024 * 1024 * 1024 \
111 #define DEFAULT_PACKED_GIT_LIMIT \
112 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
115 #define pread git_pread
116 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
120 #define setenv gitsetenv
121 extern int gitsetenv(const char *, const char *, int);
125 #define unsetenv gitunsetenv
126 extern void gitunsetenv(const char *);
130 #define strcasestr gitstrcasestr
131 extern char *gitstrcasestr(const char *haystack, const char *needle);
135 #define strlcpy gitstrlcpy
136 extern size_t gitstrlcpy(char *, const char *, size_t);
139 extern void release_pack_memory(size_t);
141 static inline char* xstrdup(const char *str)
143 char *ret = strdup(str);
145 release_pack_memory(strlen(str) + 1);
148 die("Out of memory, strdup failed");
153 static inline void *xmalloc(size_t size)
155 void *ret = malloc(size);
159 release_pack_memory(size);
164 die("Out of memory, malloc failed");
166 #ifdef XMALLOC_POISON
167 memset(ret, 0xA5, size);
172 static inline void *xrealloc(void *ptr, size_t size)
174 void *ret = realloc(ptr, size);
176 ret = realloc(ptr, 1);
178 release_pack_memory(size);
179 ret = realloc(ptr, size);
181 ret = realloc(ptr, 1);
183 die("Out of memory, realloc failed");
188 static inline void *xcalloc(size_t nmemb, size_t size)
190 void *ret = calloc(nmemb, size);
191 if (!ret && (!nmemb || !size))
194 release_pack_memory(nmemb * size);
195 ret = calloc(nmemb, size);
196 if (!ret && (!nmemb || !size))
199 die("Out of memory, calloc failed");
204 static inline void *xmmap(void *start, size_t length,
205 int prot, int flags, int fd, off_t offset)
207 void *ret = mmap(start, length, prot, flags, fd, offset);
208 if (ret == MAP_FAILED) {
211 release_pack_memory(length);
212 ret = mmap(start, length, prot, flags, fd, offset);
213 if (ret == MAP_FAILED)
214 die("Out of memory? mmap failed: %s", strerror(errno));
219 static inline ssize_t xread(int fd, void *buf, size_t len)
223 nr = read(fd, buf, len);
224 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
230 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
234 nr = write(fd, buf, len);
235 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
241 static inline int has_extension(const char *filename, const char *ext)
243 size_t len = strlen(filename);
244 size_t extlen = strlen(ext);
245 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
248 /* Sane ctype - no locale, and works with signed chars */
255 extern unsigned char sane_ctype[256];
256 #define GIT_SPACE 0x01
257 #define GIT_DIGIT 0x02
258 #define GIT_ALPHA 0x04
259 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
260 #define isspace(x) sane_istest(x,GIT_SPACE)
261 #define isdigit(x) sane_istest(x,GIT_DIGIT)
262 #define isalpha(x) sane_istest(x,GIT_ALPHA)
263 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
264 #define tolower(x) sane_case((unsigned char)(x), 0x20)
265 #define toupper(x) sane_case((unsigned char)(x), 0)
267 static inline int sane_case(int x, int high)
269 if (sane_istest(x, GIT_ALPHA))
270 x = (x & ~0x20) | high;