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]))
17 #define TYPEOF(x) (__typeof__(x))
22 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
24 /* Approximation of the length of the decimal representation of this type. */
25 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
27 #if !defined(__APPLE__) && !defined(__FreeBSD__)
28 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
29 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
45 #include <sys/param.h>
46 #include <sys/types.h>
54 #include <sys/socket.h>
57 #include <netinet/in.h>
58 #include <netinet/tcp.h>
59 #include <arpa/inet.h>
63 #if defined(__CYGWIN__)
66 #define _XOPEN_SOURCE 600
68 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
77 /* On most systems <limits.h> would have given us this, but
78 * not on some systems (e.g. GNU/Hurd).
89 #define NORETURN __attribute__((__noreturn__))
93 #define __attribute__(x)
97 /* General helper functions */
98 extern void usage(const char *err) NORETURN;
99 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
100 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
101 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
103 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
104 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
105 extern void set_error_routine(void (*routine)(const char *err, va_list params));
106 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
113 #define MAP_PRIVATE 1
114 #define MAP_FAILED ((void*)-1)
117 #define mmap git_mmap
118 #define munmap git_munmap
119 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
120 extern int git_munmap(void *start, size_t length);
122 /* This value must be multiple of (pagesize * 2) */
123 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
127 #include <sys/mman.h>
129 /* This value must be multiple of (pagesize * 2) */
130 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
131 (sizeof(void*) >= 8 \
132 ? 1 * 1024 * 1024 * 1024 \
137 #define DEFAULT_PACKED_GIT_LIMIT \
138 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
141 #define pread git_pread
142 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
146 #define setenv gitsetenv
147 extern int gitsetenv(const char *, const char *, int);
151 #define mkdtemp gitmkdtemp
152 extern char *gitmkdtemp(char *);
156 #define unsetenv gitunsetenv
157 extern void gitunsetenv(const char *);
161 #define strcasestr gitstrcasestr
162 extern char *gitstrcasestr(const char *haystack, const char *needle);
166 #define strlcpy gitstrlcpy
167 extern size_t gitstrlcpy(char *, const char *, size_t);
171 #define strtoumax gitstrtoumax
172 extern uintmax_t gitstrtoumax(const char *, char **, int);
176 #define hstrerror githstrerror
177 extern const char *githstrerror(int herror);
181 #define memmem gitmemmem
182 void *gitmemmem(const void *haystack, size_t haystacklen,
183 const void *needle, size_t needlelen);
186 extern void release_pack_memory(size_t, int);
188 static inline char* xstrdup(const char *str)
190 char *ret = strdup(str);
192 release_pack_memory(strlen(str) + 1, -1);
195 die("Out of memory, strdup failed");
200 static inline void *xmalloc(size_t size)
202 void *ret = malloc(size);
206 release_pack_memory(size, -1);
211 die("Out of memory, malloc failed");
213 #ifdef XMALLOC_POISON
214 memset(ret, 0xA5, size);
219 static inline void *xmemdupz(const void *data, size_t len)
221 char *p = xmalloc(len + 1);
222 memcpy(p, data, len);
227 static inline char *xstrndup(const char *str, size_t len)
229 char *p = memchr(str, '\0', len);
230 return xmemdupz(str, p ? p - str : len);
233 static inline void *xrealloc(void *ptr, size_t size)
235 void *ret = realloc(ptr, size);
237 ret = realloc(ptr, 1);
239 release_pack_memory(size, -1);
240 ret = realloc(ptr, size);
242 ret = realloc(ptr, 1);
244 die("Out of memory, realloc failed");
249 static inline void *xcalloc(size_t nmemb, size_t size)
251 void *ret = calloc(nmemb, size);
252 if (!ret && (!nmemb || !size))
255 release_pack_memory(nmemb * size, -1);
256 ret = calloc(nmemb, size);
257 if (!ret && (!nmemb || !size))
260 die("Out of memory, calloc failed");
265 static inline void *xmmap(void *start, size_t length,
266 int prot, int flags, int fd, off_t offset)
268 void *ret = mmap(start, length, prot, flags, fd, offset);
269 if (ret == MAP_FAILED) {
272 release_pack_memory(length, fd);
273 ret = mmap(start, length, prot, flags, fd, offset);
274 if (ret == MAP_FAILED)
275 die("Out of memory? mmap failed: %s", strerror(errno));
280 static inline ssize_t xread(int fd, void *buf, size_t len)
284 nr = read(fd, buf, len);
285 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
291 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
295 nr = write(fd, buf, len);
296 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
302 static inline int xdup(int fd)
306 die("dup failed: %s", strerror(errno));
310 static inline FILE *xfdopen(int fd, const char *mode)
312 FILE *stream = fdopen(fd, mode);
314 die("Out of memory? fdopen failed: %s", strerror(errno));
318 static inline int xmkstemp(char *template)
322 fd = mkstemp(template);
324 die("Unable to create temporary file: %s", strerror(errno));
328 static inline size_t xsize_t(off_t len)
333 static inline int has_extension(const char *filename, const char *ext)
335 size_t len = strlen(filename);
336 size_t extlen = strlen(ext);
337 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
340 /* Sane ctype - no locale, and works with signed chars */
347 extern unsigned char sane_ctype[256];
348 #define GIT_SPACE 0x01
349 #define GIT_DIGIT 0x02
350 #define GIT_ALPHA 0x04
351 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
352 #define isspace(x) sane_istest(x,GIT_SPACE)
353 #define isdigit(x) sane_istest(x,GIT_DIGIT)
354 #define isalpha(x) sane_istest(x,GIT_ALPHA)
355 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
356 #define tolower(x) sane_case((unsigned char)(x), 0x20)
357 #define toupper(x) sane_case((unsigned char)(x), 0)
359 static inline int sane_case(int x, int high)
361 if (sane_istest(x, GIT_ALPHA))
362 x = (x & ~0x20) | high;
366 static inline int prefixcmp(const char *str, const char *prefix)
368 return strncmp(str, prefix, strlen(prefix));
371 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
377 ul = strtoul(s, &p, base);
378 if (errno || *p || p == s || (unsigned int) ul != ul)
384 static inline int strtol_i(char const *s, int base, int *result)
390 ul = strtol(s, &p, base);
391 if (errno || *p || p == s || (int) ul != ul)