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>
72 #ifndef NO_SYS_SELECT_H
73 #include <sys/select.h>
77 #include <netinet/in.h>
78 #include <netinet/tcp.h>
79 #include <arpa/inet.h>
83 #if defined(__CYGWIN__)
86 #define _XOPEN_SOURCE 600
88 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
97 /* On most systems <limits.h> would have given us this, but
98 * not on some systems (e.g. GNU/Hurd).
101 #define PATH_MAX 4096
105 #define PRIuMAX "llu"
109 #define NORETURN __attribute__((__noreturn__))
112 #ifndef __attribute__
113 #define __attribute__(x)
117 /* General helper functions */
118 extern void usage(const char *err) NORETURN;
119 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
120 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
121 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
123 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
124 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
125 extern void set_error_routine(void (*routine)(const char *err, va_list params));
126 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
128 extern int prefixcmp(const char *str, const char *prefix);
135 #define MAP_PRIVATE 1
136 #define MAP_FAILED ((void*)-1)
139 #define mmap git_mmap
140 #define munmap git_munmap
141 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
142 extern int git_munmap(void *start, size_t length);
144 /* This value must be multiple of (pagesize * 2) */
145 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
149 #include <sys/mman.h>
151 /* This value must be multiple of (pagesize * 2) */
152 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
153 (sizeof(void*) >= 8 \
154 ? 1 * 1024 * 1024 * 1024 \
159 #define DEFAULT_PACKED_GIT_LIMIT \
160 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
163 #define pread git_pread
164 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
168 #define setenv gitsetenv
169 extern int gitsetenv(const char *, const char *, int);
173 #define mkdtemp gitmkdtemp
174 extern char *gitmkdtemp(char *);
178 #define unsetenv gitunsetenv
179 extern void gitunsetenv(const char *);
183 #define strcasestr gitstrcasestr
184 extern char *gitstrcasestr(const char *haystack, const char *needle);
188 #define strlcpy gitstrlcpy
189 extern size_t gitstrlcpy(char *, const char *, size_t);
193 #define strtoumax gitstrtoumax
194 extern uintmax_t gitstrtoumax(const char *, char **, int);
198 #define hstrerror githstrerror
199 extern const char *githstrerror(int herror);
203 #define memmem gitmemmem
204 void *gitmemmem(const void *haystack, size_t haystacklen,
205 const void *needle, size_t needlelen);
208 #ifdef FREAD_READS_DIRECTORIES
209 #define fopen(a,b) git_fopen(a,b)
210 extern FILE *git_fopen(const char*, const char*);
213 #ifdef SNPRINTF_RETURNS_BOGUS
214 #define snprintf git_snprintf
215 extern int git_snprintf(char *str, size_t maxsize,
216 const char *format, ...);
217 #define vsnprintf git_vsnprintf
218 extern int git_vsnprintf(char *str, size_t maxsize,
219 const char *format, va_list ap);
222 #ifdef __GLIBC_PREREQ
223 #if __GLIBC_PREREQ(2, 1)
224 #define HAVE_STRCHRNUL
228 #ifndef HAVE_STRCHRNUL
229 #define strchrnul gitstrchrnul
230 static inline char *gitstrchrnul(const char *s, int c)
232 while (*s && *s != c)
238 extern void release_pack_memory(size_t, int);
240 static inline char* xstrdup(const char *str)
242 char *ret = strdup(str);
244 release_pack_memory(strlen(str) + 1, -1);
247 die("Out of memory, strdup failed");
252 static inline void *xmalloc(size_t size)
254 void *ret = malloc(size);
258 release_pack_memory(size, -1);
263 die("Out of memory, malloc failed");
265 #ifdef XMALLOC_POISON
266 memset(ret, 0xA5, size);
272 * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
273 * "data" to the allocated memory, zero terminates the allocated memory,
274 * and returns a pointer to the allocated memory. If the allocation fails,
277 static inline void *xmemdupz(const void *data, size_t len)
279 char *p = xmalloc(len + 1);
280 memcpy(p, data, len);
285 static inline char *xstrndup(const char *str, size_t len)
287 char *p = memchr(str, '\0', len);
288 return xmemdupz(str, p ? p - str : len);
291 static inline void *xrealloc(void *ptr, size_t size)
293 void *ret = realloc(ptr, size);
295 ret = realloc(ptr, 1);
297 release_pack_memory(size, -1);
298 ret = realloc(ptr, size);
300 ret = realloc(ptr, 1);
302 die("Out of memory, realloc failed");
307 static inline void *xcalloc(size_t nmemb, size_t size)
309 void *ret = calloc(nmemb, size);
310 if (!ret && (!nmemb || !size))
313 release_pack_memory(nmemb * size, -1);
314 ret = calloc(nmemb, size);
315 if (!ret && (!nmemb || !size))
318 die("Out of memory, calloc failed");
323 static inline void *xmmap(void *start, size_t length,
324 int prot, int flags, int fd, off_t offset)
326 void *ret = mmap(start, length, prot, flags, fd, offset);
327 if (ret == MAP_FAILED) {
330 release_pack_memory(length, fd);
331 ret = mmap(start, length, prot, flags, fd, offset);
332 if (ret == MAP_FAILED)
333 die("Out of memory? mmap failed: %s", strerror(errno));
339 * xread() is the same a read(), but it automatically restarts read()
340 * operations with a recoverable error (EAGAIN and EINTR). xread()
341 * DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
343 static inline ssize_t xread(int fd, void *buf, size_t len)
347 nr = read(fd, buf, len);
348 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
355 * xwrite() is the same a write(), but it automatically restarts write()
356 * operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
357 * GUARANTEE that "len" bytes is written even if the operation is successful.
359 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
363 nr = write(fd, buf, len);
364 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
370 static inline int xdup(int fd)
374 die("dup failed: %s", strerror(errno));
378 static inline FILE *xfdopen(int fd, const char *mode)
380 FILE *stream = fdopen(fd, mode);
382 die("Out of memory? fdopen failed: %s", strerror(errno));
386 static inline int xmkstemp(char *template)
390 fd = mkstemp(template);
392 die("Unable to create temporary file: %s", strerror(errno));
396 static inline size_t xsize_t(off_t len)
401 static inline int has_extension(const char *filename, const char *ext)
403 size_t len = strlen(filename);
404 size_t extlen = strlen(ext);
405 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
408 /* Sane ctype - no locale, and works with signed chars */
415 extern unsigned char sane_ctype[256];
416 #define GIT_SPACE 0x01
417 #define GIT_DIGIT 0x02
418 #define GIT_ALPHA 0x04
419 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
420 #define isspace(x) sane_istest(x,GIT_SPACE)
421 #define isdigit(x) sane_istest(x,GIT_DIGIT)
422 #define isalpha(x) sane_istest(x,GIT_ALPHA)
423 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
424 #define tolower(x) sane_case((unsigned char)(x), 0x20)
425 #define toupper(x) sane_case((unsigned char)(x), 0)
427 static inline int sane_case(int x, int high)
429 if (sane_istest(x, GIT_ALPHA))
430 x = (x & ~0x20) | high;
434 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
440 ul = strtoul(s, &p, base);
441 if (errno || *p || p == s || (unsigned int) ul != ul)
447 static inline int strtol_i(char const *s, int base, int *result)
453 ul = strtol(s, &p, base);
454 if (errno || *p || p == s || (int) ul != ul)
460 #ifdef INTERNAL_QSORT
461 void git_qsort(void *base, size_t nmemb, size_t size,
462 int(*compar)(const void *, const void *));
463 #define qsort git_qsort
466 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
467 # define FORCE_DIR_SET_GID S_ISGID
469 # define FORCE_DIR_SET_GID 0