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__) && !defined(__USLC__) && !defined(_M_UNIX)
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>
73 #include <sys/socket.h>
74 #include <sys/ioctl.h>
75 #ifndef NO_SYS_SELECT_H
76 #include <sys/select.h>
78 #include <netinet/in.h>
79 #include <netinet/tcp.h>
80 #include <arpa/inet.h>
84 #if defined(__CYGWIN__)
87 #define _XOPEN_SOURCE 600
89 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
93 #else /* __MINGW32__ */
94 /* pull in Windows compatibility stuff */
95 #include "compat/mingw.h"
96 #endif /* __MINGW32__ */
102 /* On most systems <limits.h> would have given us this, but
103 * not on some systems (e.g. GNU/Hurd).
106 #define PATH_MAX 4096
110 #define PRIuMAX "llu"
114 #define NORETURN __attribute__((__noreturn__))
117 #ifndef __attribute__
118 #define __attribute__(x)
122 /* General helper functions */
123 extern void usage(const char *err) NORETURN;
124 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
125 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
126 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
128 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
129 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
130 extern void set_error_routine(void (*routine)(const char *err, va_list params));
131 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
133 extern int prefixcmp(const char *str, const char *prefix);
140 #define MAP_PRIVATE 1
141 #define MAP_FAILED ((void*)-1)
144 #define mmap git_mmap
145 #define munmap git_munmap
146 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
147 extern int git_munmap(void *start, size_t length);
149 /* This value must be multiple of (pagesize * 2) */
150 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
154 #include <sys/mman.h>
156 /* This value must be multiple of (pagesize * 2) */
157 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
158 (sizeof(void*) >= 8 \
159 ? 1 * 1024 * 1024 * 1024 \
164 #define DEFAULT_PACKED_GIT_LIMIT \
165 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
168 #define pread git_pread
169 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
173 #define setenv gitsetenv
174 extern int gitsetenv(const char *, const char *, int);
178 #define mkdtemp gitmkdtemp
179 extern char *gitmkdtemp(char *);
183 #define unsetenv gitunsetenv
184 extern void gitunsetenv(const char *);
188 #define strcasestr gitstrcasestr
189 extern char *gitstrcasestr(const char *haystack, const char *needle);
193 #define strlcpy gitstrlcpy
194 extern size_t gitstrlcpy(char *, const char *, size_t);
198 #define strtoumax gitstrtoumax
199 extern uintmax_t gitstrtoumax(const char *, char **, int);
203 #define hstrerror githstrerror
204 extern const char *githstrerror(int herror);
208 #define memmem gitmemmem
209 void *gitmemmem(const void *haystack, size_t haystacklen,
210 const void *needle, size_t needlelen);
213 #ifdef FREAD_READS_DIRECTORIES
217 #define fopen(a,b) git_fopen(a,b)
218 extern FILE *git_fopen(const char*, const char*);
221 #ifdef SNPRINTF_RETURNS_BOGUS
222 #define snprintf git_snprintf
223 extern int git_snprintf(char *str, size_t maxsize,
224 const char *format, ...);
225 #define vsnprintf git_vsnprintf
226 extern int git_vsnprintf(char *str, size_t maxsize,
227 const char *format, va_list ap);
230 #ifdef __GLIBC_PREREQ
231 #if __GLIBC_PREREQ(2, 1)
232 #define HAVE_STRCHRNUL
236 #ifndef HAVE_STRCHRNUL
237 #define strchrnul gitstrchrnul
238 static inline char *gitstrchrnul(const char *s, int c)
240 while (*s && *s != c)
246 extern void release_pack_memory(size_t, int);
248 static inline char* xstrdup(const char *str)
250 char *ret = strdup(str);
252 release_pack_memory(strlen(str) + 1, -1);
255 die("Out of memory, strdup failed");
260 static inline void *xmalloc(size_t size)
262 void *ret = malloc(size);
266 release_pack_memory(size, -1);
271 die("Out of memory, malloc failed");
273 #ifdef XMALLOC_POISON
274 memset(ret, 0xA5, size);
280 * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
281 * "data" to the allocated memory, zero terminates the allocated memory,
282 * and returns a pointer to the allocated memory. If the allocation fails,
285 static inline void *xmemdupz(const void *data, size_t len)
287 char *p = xmalloc(len + 1);
288 memcpy(p, data, len);
293 static inline char *xstrndup(const char *str, size_t len)
295 char *p = memchr(str, '\0', len);
296 return xmemdupz(str, p ? p - str : len);
299 static inline void *xrealloc(void *ptr, size_t size)
301 void *ret = realloc(ptr, size);
303 ret = realloc(ptr, 1);
305 release_pack_memory(size, -1);
306 ret = realloc(ptr, size);
308 ret = realloc(ptr, 1);
310 die("Out of memory, realloc failed");
315 static inline void *xcalloc(size_t nmemb, size_t size)
317 void *ret = calloc(nmemb, size);
318 if (!ret && (!nmemb || !size))
321 release_pack_memory(nmemb * size, -1);
322 ret = calloc(nmemb, size);
323 if (!ret && (!nmemb || !size))
326 die("Out of memory, calloc failed");
331 static inline void *xmmap(void *start, size_t length,
332 int prot, int flags, int fd, off_t offset)
334 void *ret = mmap(start, length, prot, flags, fd, offset);
335 if (ret == MAP_FAILED) {
338 release_pack_memory(length, fd);
339 ret = mmap(start, length, prot, flags, fd, offset);
340 if (ret == MAP_FAILED)
341 die("Out of memory? mmap failed: %s", strerror(errno));
347 * xread() is the same a read(), but it automatically restarts read()
348 * operations with a recoverable error (EAGAIN and EINTR). xread()
349 * DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
351 static inline ssize_t xread(int fd, void *buf, size_t len)
355 nr = read(fd, buf, len);
356 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
363 * xwrite() is the same a write(), but it automatically restarts write()
364 * operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
365 * GUARANTEE that "len" bytes is written even if the operation is successful.
367 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
371 nr = write(fd, buf, len);
372 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
378 static inline int xdup(int fd)
382 die("dup failed: %s", strerror(errno));
386 static inline FILE *xfdopen(int fd, const char *mode)
388 FILE *stream = fdopen(fd, mode);
390 die("Out of memory? fdopen failed: %s", strerror(errno));
394 static inline int xmkstemp(char *template)
398 fd = mkstemp(template);
400 die("Unable to create temporary file: %s", strerror(errno));
404 static inline size_t xsize_t(off_t len)
409 static inline int has_extension(const char *filename, const char *ext)
411 size_t len = strlen(filename);
412 size_t extlen = strlen(ext);
413 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
416 /* Sane ctype - no locale, and works with signed chars */
423 extern unsigned char sane_ctype[256];
424 #define GIT_SPACE 0x01
425 #define GIT_DIGIT 0x02
426 #define GIT_ALPHA 0x04
427 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
428 #define isspace(x) sane_istest(x,GIT_SPACE)
429 #define isdigit(x) sane_istest(x,GIT_DIGIT)
430 #define isalpha(x) sane_istest(x,GIT_ALPHA)
431 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
432 #define tolower(x) sane_case((unsigned char)(x), 0x20)
433 #define toupper(x) sane_case((unsigned char)(x), 0)
435 static inline int sane_case(int x, int high)
437 if (sane_istest(x, GIT_ALPHA))
438 x = (x & ~0x20) | high;
442 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
448 ul = strtoul(s, &p, base);
449 if (errno || *p || p == s || (unsigned int) ul != ul)
455 static inline int strtol_i(char const *s, int base, int *result)
461 ul = strtol(s, &p, base);
462 if (errno || *p || p == s || (int) ul != ul)
468 #ifdef INTERNAL_QSORT
469 void git_qsort(void *base, size_t nmemb, size_t size,
470 int(*compar)(const void *, const void *));
471 #define qsort git_qsort
474 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
475 # define FORCE_DIR_SET_GID S_ISGID
477 # define FORCE_DIR_SET_GID 0