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))))
23 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
25 /* Approximation of the length of the decimal representation of this type. */
26 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
28 #if !defined(__APPLE__) && !defined(__FreeBSD__)
29 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
30 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
46 #include <sys/param.h>
47 #include <sys/types.h>
55 #include <sys/socket.h>
58 #include <netinet/in.h>
59 #include <netinet/tcp.h>
60 #include <arpa/inet.h>
64 #if defined(__CYGWIN__)
67 #define _XOPEN_SOURCE 600
69 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
78 /* On most systems <limits.h> would have given us this, but
79 * not on some systems (e.g. GNU/Hurd).
90 #define NORETURN __attribute__((__noreturn__))
94 #define __attribute__(x)
98 /* General helper functions */
99 extern void usage(const char *err) NORETURN;
100 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
101 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
102 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
104 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
105 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
106 extern void set_error_routine(void (*routine)(const char *err, va_list params));
107 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
114 #define MAP_PRIVATE 1
115 #define MAP_FAILED ((void*)-1)
118 #define mmap git_mmap
119 #define munmap git_munmap
120 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
121 extern int git_munmap(void *start, size_t length);
123 /* This value must be multiple of (pagesize * 2) */
124 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
128 #include <sys/mman.h>
130 /* This value must be multiple of (pagesize * 2) */
131 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
132 (sizeof(void*) >= 8 \
133 ? 1 * 1024 * 1024 * 1024 \
138 #define DEFAULT_PACKED_GIT_LIMIT \
139 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
142 #define pread git_pread
143 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
147 #define setenv gitsetenv
148 extern int gitsetenv(const char *, const char *, int);
152 #define mkdtemp gitmkdtemp
153 extern char *gitmkdtemp(char *);
157 #define unsetenv gitunsetenv
158 extern void gitunsetenv(const char *);
162 #define strcasestr gitstrcasestr
163 extern char *gitstrcasestr(const char *haystack, const char *needle);
167 #define strlcpy gitstrlcpy
168 extern size_t gitstrlcpy(char *, const char *, size_t);
172 #define strtoumax gitstrtoumax
173 extern uintmax_t gitstrtoumax(const char *, char **, int);
177 #define hstrerror githstrerror
178 extern const char *githstrerror(int herror);
182 #define memmem gitmemmem
183 void *gitmemmem(const void *haystack, size_t haystacklen,
184 const void *needle, size_t needlelen);
187 #ifdef __GLIBC_PREREQ
188 #if __GLIBC_PREREQ(2, 1)
189 #define HAVE_STRCHRNUL
193 #ifndef HAVE_STRCHRNUL
194 #define strchrnul gitstrchrnul
195 static inline char *gitstrchrnul(const char *s, int c)
197 while (*s && *s != c)
203 extern void release_pack_memory(size_t, int);
205 static inline char* xstrdup(const char *str)
207 char *ret = strdup(str);
209 release_pack_memory(strlen(str) + 1, -1);
212 die("Out of memory, strdup failed");
217 static inline void *xmalloc(size_t size)
219 void *ret = malloc(size);
223 release_pack_memory(size, -1);
228 die("Out of memory, malloc failed");
230 #ifdef XMALLOC_POISON
231 memset(ret, 0xA5, size);
236 static inline void *xmemdupz(const void *data, size_t len)
238 char *p = xmalloc(len + 1);
239 memcpy(p, data, len);
244 static inline char *xstrndup(const char *str, size_t len)
246 char *p = memchr(str, '\0', len);
247 return xmemdupz(str, p ? p - str : len);
250 static inline void *xrealloc(void *ptr, size_t size)
252 void *ret = realloc(ptr, size);
254 ret = realloc(ptr, 1);
256 release_pack_memory(size, -1);
257 ret = realloc(ptr, size);
259 ret = realloc(ptr, 1);
261 die("Out of memory, realloc failed");
266 static inline void *xcalloc(size_t nmemb, size_t size)
268 void *ret = calloc(nmemb, size);
269 if (!ret && (!nmemb || !size))
272 release_pack_memory(nmemb * size, -1);
273 ret = calloc(nmemb, size);
274 if (!ret && (!nmemb || !size))
277 die("Out of memory, calloc failed");
282 static inline void *xmmap(void *start, size_t length,
283 int prot, int flags, int fd, off_t offset)
285 void *ret = mmap(start, length, prot, flags, fd, offset);
286 if (ret == MAP_FAILED) {
289 release_pack_memory(length, fd);
290 ret = mmap(start, length, prot, flags, fd, offset);
291 if (ret == MAP_FAILED)
292 die("Out of memory? mmap failed: %s", strerror(errno));
297 static inline ssize_t xread(int fd, void *buf, size_t len)
301 nr = read(fd, buf, len);
302 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
308 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
312 nr = write(fd, buf, len);
313 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
319 static inline int xdup(int fd)
323 die("dup failed: %s", strerror(errno));
327 static inline FILE *xfdopen(int fd, const char *mode)
329 FILE *stream = fdopen(fd, mode);
331 die("Out of memory? fdopen failed: %s", strerror(errno));
335 static inline int xmkstemp(char *template)
339 fd = mkstemp(template);
341 die("Unable to create temporary file: %s", strerror(errno));
345 static inline size_t xsize_t(off_t len)
350 static inline int has_extension(const char *filename, const char *ext)
352 size_t len = strlen(filename);
353 size_t extlen = strlen(ext);
354 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
357 /* Sane ctype - no locale, and works with signed chars */
364 extern unsigned char sane_ctype[256];
365 #define GIT_SPACE 0x01
366 #define GIT_DIGIT 0x02
367 #define GIT_ALPHA 0x04
368 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
369 #define isspace(x) sane_istest(x,GIT_SPACE)
370 #define isdigit(x) sane_istest(x,GIT_DIGIT)
371 #define isalpha(x) sane_istest(x,GIT_ALPHA)
372 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
373 #define tolower(x) sane_case((unsigned char)(x), 0x20)
374 #define toupper(x) sane_case((unsigned char)(x), 0)
376 static inline int sane_case(int x, int high)
378 if (sane_istest(x, GIT_ALPHA))
379 x = (x & ~0x20) | high;
383 static inline int prefixcmp(const char *str, const char *prefix)
385 return strncmp(str, prefix, strlen(prefix));
388 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
394 ul = strtoul(s, &p, base);
395 if (errno || *p || p == s || (unsigned int) ul != ul)
401 static inline int strtol_i(char const *s, int base, int *result)
407 ul = strtol(s, &p, base);
408 if (errno || *p || p == s || (int) ul != ul)