1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
8 * See if our compiler is known to support flexible array members.
10 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
11 # define FLEX_ARRAY /* empty */
12 #elif defined(__GNUC__)
14 # define FLEX_ARRAY /* empty */
16 # define FLEX_ARRAY 0 /* older GNU extension */
21 * Otherwise, default to safer but a bit wasteful traditional style
28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
31 #define TYPEOF(x) (__typeof__(x))
36 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
37 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
39 /* Approximation of the length of the decimal representation of this type. */
40 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
42 #if !defined(__APPLE__) && !defined(__FreeBSD__)
43 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
44 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
60 #include <sys/param.h>
61 #include <sys/types.h>
69 #include <sys/socket.h>
70 #include <sys/ioctl.h>
71 #ifndef NO_SYS_SELECT_H
72 #include <sys/select.h>
76 #include <netinet/in.h>
77 #include <netinet/tcp.h>
78 #include <arpa/inet.h>
82 #if defined(__CYGWIN__)
85 #define _XOPEN_SOURCE 600
87 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
96 /* On most systems <limits.h> would have given us this, but
97 * not on some systems (e.g. GNU/Hurd).
100 #define PATH_MAX 4096
104 #define PRIuMAX "llu"
108 #define NORETURN __attribute__((__noreturn__))
111 #ifndef __attribute__
112 #define __attribute__(x)
116 /* General helper functions */
117 extern void usage(const char *err) NORETURN;
118 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
119 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
120 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
122 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
123 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
124 extern void set_error_routine(void (*routine)(const char *err, va_list params));
125 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
127 extern int prefixcmp(const char *str, const char *prefix);
134 #define MAP_PRIVATE 1
135 #define MAP_FAILED ((void*)-1)
138 #define mmap git_mmap
139 #define munmap git_munmap
140 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
141 extern int git_munmap(void *start, size_t length);
143 /* This value must be multiple of (pagesize * 2) */
144 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
148 #include <sys/mman.h>
150 /* This value must be multiple of (pagesize * 2) */
151 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
152 (sizeof(void*) >= 8 \
153 ? 1 * 1024 * 1024 * 1024 \
158 #define DEFAULT_PACKED_GIT_LIMIT \
159 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
162 #define pread git_pread
163 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
167 #define setenv gitsetenv
168 extern int gitsetenv(const char *, const char *, int);
172 #define mkdtemp gitmkdtemp
173 extern char *gitmkdtemp(char *);
177 #define unsetenv gitunsetenv
178 extern void gitunsetenv(const char *);
182 #define strcasestr gitstrcasestr
183 extern char *gitstrcasestr(const char *haystack, const char *needle);
187 #define strlcpy gitstrlcpy
188 extern size_t gitstrlcpy(char *, const char *, size_t);
192 #define strtoumax gitstrtoumax
193 extern uintmax_t gitstrtoumax(const char *, char **, int);
197 #define hstrerror githstrerror
198 extern const char *githstrerror(int herror);
202 #define memmem gitmemmem
203 void *gitmemmem(const void *haystack, size_t haystacklen,
204 const void *needle, size_t needlelen);
207 #ifdef __GLIBC_PREREQ
208 #if __GLIBC_PREREQ(2, 1)
209 #define HAVE_STRCHRNUL
213 #ifndef HAVE_STRCHRNUL
214 #define strchrnul gitstrchrnul
215 static inline char *gitstrchrnul(const char *s, int c)
217 while (*s && *s != c)
223 extern void release_pack_memory(size_t, int);
225 static inline char* xstrdup(const char *str)
227 char *ret = strdup(str);
229 release_pack_memory(strlen(str) + 1, -1);
232 die("Out of memory, strdup failed");
237 static inline void *xmalloc(size_t size)
239 void *ret = malloc(size);
243 release_pack_memory(size, -1);
248 die("Out of memory, malloc failed");
250 #ifdef XMALLOC_POISON
251 memset(ret, 0xA5, size);
256 static inline void *xmemdupz(const void *data, size_t len)
258 char *p = xmalloc(len + 1);
259 memcpy(p, data, len);
264 static inline char *xstrndup(const char *str, size_t len)
266 char *p = memchr(str, '\0', len);
267 return xmemdupz(str, p ? p - str : len);
270 static inline void *xrealloc(void *ptr, size_t size)
272 void *ret = realloc(ptr, size);
274 ret = realloc(ptr, 1);
276 release_pack_memory(size, -1);
277 ret = realloc(ptr, size);
279 ret = realloc(ptr, 1);
281 die("Out of memory, realloc failed");
286 static inline void *xcalloc(size_t nmemb, size_t size)
288 void *ret = calloc(nmemb, size);
289 if (!ret && (!nmemb || !size))
292 release_pack_memory(nmemb * size, -1);
293 ret = calloc(nmemb, size);
294 if (!ret && (!nmemb || !size))
297 die("Out of memory, calloc failed");
302 static inline void *xmmap(void *start, size_t length,
303 int prot, int flags, int fd, off_t offset)
305 void *ret = mmap(start, length, prot, flags, fd, offset);
306 if (ret == MAP_FAILED) {
309 release_pack_memory(length, fd);
310 ret = mmap(start, length, prot, flags, fd, offset);
311 if (ret == MAP_FAILED)
312 die("Out of memory? mmap failed: %s", strerror(errno));
317 static inline ssize_t xread(int fd, void *buf, size_t len)
321 nr = read(fd, buf, len);
322 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
328 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
332 nr = write(fd, buf, len);
333 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
339 static inline int xdup(int fd)
343 die("dup failed: %s", strerror(errno));
347 static inline FILE *xfdopen(int fd, const char *mode)
349 FILE *stream = fdopen(fd, mode);
351 die("Out of memory? fdopen failed: %s", strerror(errno));
355 static inline int xmkstemp(char *template)
359 fd = mkstemp(template);
361 die("Unable to create temporary file: %s", strerror(errno));
365 static inline size_t xsize_t(off_t len)
370 static inline int has_extension(const char *filename, const char *ext)
372 size_t len = strlen(filename);
373 size_t extlen = strlen(ext);
374 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
377 /* Sane ctype - no locale, and works with signed chars */
384 extern unsigned char sane_ctype[256];
385 #define GIT_SPACE 0x01
386 #define GIT_DIGIT 0x02
387 #define GIT_ALPHA 0x04
388 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
389 #define isspace(x) sane_istest(x,GIT_SPACE)
390 #define isdigit(x) sane_istest(x,GIT_DIGIT)
391 #define isalpha(x) sane_istest(x,GIT_ALPHA)
392 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
393 #define tolower(x) sane_case((unsigned char)(x), 0x20)
394 #define toupper(x) sane_case((unsigned char)(x), 0)
396 static inline int sane_case(int x, int high)
398 if (sane_istest(x, GIT_ALPHA))
399 x = (x & ~0x20) | high;
403 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
409 ul = strtoul(s, &p, base);
410 if (errno || *p || p == s || (unsigned int) ul != ul)
416 static inline int strtol_i(char const *s, int base, int *result)
422 ul = strtol(s, &p, base);
423 if (errno || *p || p == s || (int) ul != ul)