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 #if !defined(__APPLE__) && !defined(__FreeBSD__)
17 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
18 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
34 #include <sys/param.h>
35 #include <sys/types.h>
43 #include <sys/socket.h>
46 #include <netinet/in.h>
47 #include <netinet/tcp.h>
48 #include <arpa/inet.h>
52 #if defined(__CYGWIN__)
55 #define _XOPEN_SOURCE 600
57 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
66 /* On most systems <limits.h> would have given us this, but
67 * not on some systems (e.g. GNU/Hurd).
78 #define NORETURN __attribute__((__noreturn__))
82 #define __attribute__(x)
86 /* General helper functions */
87 extern void usage(const char *err) NORETURN;
88 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
89 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
90 extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
92 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
93 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
94 extern void set_error_routine(void (*routine)(const char *err, va_list params));
95 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
102 #define MAP_PRIVATE 1
103 #define MAP_FAILED ((void*)-1)
106 #define mmap git_mmap
107 #define munmap git_munmap
108 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
109 extern int git_munmap(void *start, size_t length);
111 /* This value must be multiple of (pagesize * 2) */
112 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
116 #include <sys/mman.h>
118 /* This value must be multiple of (pagesize * 2) */
119 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
120 (sizeof(void*) >= 8 \
121 ? 1 * 1024 * 1024 * 1024 \
126 #define DEFAULT_PACKED_GIT_LIMIT \
127 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
130 #define pread git_pread
131 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
135 #define setenv gitsetenv
136 extern int gitsetenv(const char *, const char *, int);
140 #define unsetenv gitunsetenv
141 extern void gitunsetenv(const char *);
145 #define strcasestr gitstrcasestr
146 extern char *gitstrcasestr(const char *haystack, const char *needle);
150 #define strlcpy gitstrlcpy
151 extern size_t gitstrlcpy(char *, const char *, size_t);
155 #define strtoumax gitstrtoumax
156 extern uintmax_t gitstrtoumax(const char *, char **, int);
159 extern void release_pack_memory(size_t);
161 static inline char* xstrdup(const char *str)
163 char *ret = strdup(str);
165 release_pack_memory(strlen(str) + 1);
168 die("Out of memory, strdup failed");
173 static inline void *xmalloc(size_t size)
175 void *ret = malloc(size);
179 release_pack_memory(size);
184 die("Out of memory, malloc failed");
186 #ifdef XMALLOC_POISON
187 memset(ret, 0xA5, size);
192 static inline void *xrealloc(void *ptr, size_t size)
194 void *ret = realloc(ptr, size);
196 ret = realloc(ptr, 1);
198 release_pack_memory(size);
199 ret = realloc(ptr, size);
201 ret = realloc(ptr, 1);
203 die("Out of memory, realloc failed");
208 static inline void *xcalloc(size_t nmemb, size_t size)
210 void *ret = calloc(nmemb, size);
211 if (!ret && (!nmemb || !size))
214 release_pack_memory(nmemb * size);
215 ret = calloc(nmemb, size);
216 if (!ret && (!nmemb || !size))
219 die("Out of memory, calloc failed");
224 static inline void *xmmap(void *start, size_t length,
225 int prot, int flags, int fd, off_t offset)
227 void *ret = mmap(start, length, prot, flags, fd, offset);
228 if (ret == MAP_FAILED) {
231 release_pack_memory(length);
232 ret = mmap(start, length, prot, flags, fd, offset);
233 if (ret == MAP_FAILED)
234 die("Out of memory? mmap failed: %s", strerror(errno));
239 static inline ssize_t xread(int fd, void *buf, size_t len)
243 nr = read(fd, buf, len);
244 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
250 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
254 nr = write(fd, buf, len);
255 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
261 static inline size_t xsize_t(off_t len)
266 static inline int has_extension(const char *filename, const char *ext)
268 size_t len = strlen(filename);
269 size_t extlen = strlen(ext);
270 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
273 /* Sane ctype - no locale, and works with signed chars */
280 extern unsigned char sane_ctype[256];
281 #define GIT_SPACE 0x01
282 #define GIT_DIGIT 0x02
283 #define GIT_ALPHA 0x04
284 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
285 #define isspace(x) sane_istest(x,GIT_SPACE)
286 #define isdigit(x) sane_istest(x,GIT_DIGIT)
287 #define isalpha(x) sane_istest(x,GIT_ALPHA)
288 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
289 #define tolower(x) sane_case((unsigned char)(x), 0x20)
290 #define toupper(x) sane_case((unsigned char)(x), 0)
292 static inline int sane_case(int x, int high)
294 if (sane_istest(x, GIT_ALPHA))
295 x = (x & ~0x20) | high;
299 static inline int prefixcmp(const char *str, const char *prefix)
301 return strncmp(str, prefix, strlen(prefix));