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 /* This value must be multiple of (pagesize * 2) */
100 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
104 #include <sys/mman.h>
106 /* This value must be multiple of (pagesize * 2) */
107 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
108 (sizeof(void*) >= 8 \
109 ? 1 * 1024 * 1024 * 1024 \
114 #define DEFAULT_PACKED_GIT_LIMIT \
115 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
118 #define pread git_pread
119 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
123 #define setenv gitsetenv
124 extern int gitsetenv(const char *, const char *, int);
128 #define unsetenv gitunsetenv
129 extern void gitunsetenv(const char *);
133 #define strcasestr gitstrcasestr
134 extern char *gitstrcasestr(const char *haystack, const char *needle);
138 #define strlcpy gitstrlcpy
139 extern size_t gitstrlcpy(char *, const char *, size_t);
143 #define strtoumax gitstrtoumax
144 extern uintmax_t gitstrtoumax(const char *, char **, int);
147 extern void release_pack_memory(size_t);
149 static inline char* xstrdup(const char *str)
151 char *ret = strdup(str);
153 release_pack_memory(strlen(str) + 1);
156 die("Out of memory, strdup failed");
161 static inline void *xmalloc(size_t size)
163 void *ret = malloc(size);
167 release_pack_memory(size);
172 die("Out of memory, malloc failed");
174 #ifdef XMALLOC_POISON
175 memset(ret, 0xA5, size);
180 static inline void *xrealloc(void *ptr, size_t size)
182 void *ret = realloc(ptr, size);
184 ret = realloc(ptr, 1);
186 release_pack_memory(size);
187 ret = realloc(ptr, size);
189 ret = realloc(ptr, 1);
191 die("Out of memory, realloc failed");
196 static inline void *xcalloc(size_t nmemb, size_t size)
198 void *ret = calloc(nmemb, size);
199 if (!ret && (!nmemb || !size))
202 release_pack_memory(nmemb * size);
203 ret = calloc(nmemb, size);
204 if (!ret && (!nmemb || !size))
207 die("Out of memory, calloc failed");
212 static inline void *xmmap(void *start, size_t length,
213 int prot, int flags, int fd, off_t offset)
215 void *ret = mmap(start, length, prot, flags, fd, offset);
216 if (ret == MAP_FAILED) {
219 release_pack_memory(length);
220 ret = mmap(start, length, prot, flags, fd, offset);
221 if (ret == MAP_FAILED)
222 die("Out of memory? mmap failed: %s", strerror(errno));
227 static inline ssize_t xread(int fd, void *buf, size_t len)
231 nr = read(fd, buf, len);
232 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
238 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
242 nr = write(fd, buf, len);
243 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
249 static inline int has_extension(const char *filename, const char *ext)
251 size_t len = strlen(filename);
252 size_t extlen = strlen(ext);
253 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
256 /* Sane ctype - no locale, and works with signed chars */
263 extern unsigned char sane_ctype[256];
264 #define GIT_SPACE 0x01
265 #define GIT_DIGIT 0x02
266 #define GIT_ALPHA 0x04
267 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
268 #define isspace(x) sane_istest(x,GIT_SPACE)
269 #define isdigit(x) sane_istest(x,GIT_DIGIT)
270 #define isalpha(x) sane_istest(x,GIT_ALPHA)
271 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
272 #define tolower(x) sane_case((unsigned char)(x), 0x20)
273 #define toupper(x) sane_case((unsigned char)(x), 0)
275 static inline int sane_case(int x, int high)
277 if (sane_istest(x, GIT_ALPHA))
278 x = (x & ~0x20) | high;