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"
125 #ifndef STRIP_EXTENSION
126 #define STRIP_EXTENSION ""
129 #ifndef has_dos_drive_prefix
130 #define has_dos_drive_prefix(path) 0
134 #define is_dir_sep(c) ((c) == '/')
138 #define NORETURN __attribute__((__noreturn__))
141 #ifndef __attribute__
142 #define __attribute__(x)
146 /* General helper functions */
147 extern void usage(const char *err) NORETURN;
148 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
149 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
150 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
152 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
153 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
154 extern void set_error_routine(void (*routine)(const char *err, va_list params));
155 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
157 extern int prefixcmp(const char *str, const char *prefix);
158 extern time_t tm_to_time_t(const struct tm *tm);
160 static inline const char *skip_prefix(const char *str, const char *prefix)
162 size_t len = strlen(prefix);
163 return strncmp(str, prefix, len) ? NULL : str + len;
171 #define MAP_PRIVATE 1
172 #define MAP_FAILED ((void*)-1)
175 #define mmap git_mmap
176 #define munmap git_munmap
177 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
178 extern int git_munmap(void *start, size_t length);
180 /* This value must be multiple of (pagesize * 2) */
181 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
185 #include <sys/mman.h>
187 /* This value must be multiple of (pagesize * 2) */
188 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
189 (sizeof(void*) >= 8 \
190 ? 1 * 1024 * 1024 * 1024 \
195 #define DEFAULT_PACKED_GIT_LIMIT \
196 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
199 #define pread git_pread
200 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
203 * Forward decl that will remind us if its twin in cache.h changes.
204 * This function is used in compat/pread.c. But we can't include
207 extern ssize_t read_in_full(int fd, void *buf, size_t count);
210 #define setenv gitsetenv
211 extern int gitsetenv(const char *, const char *, int);
215 #define mkdtemp gitmkdtemp
216 extern char *gitmkdtemp(char *);
220 #define unsetenv gitunsetenv
221 extern void gitunsetenv(const char *);
225 #define strcasestr gitstrcasestr
226 extern char *gitstrcasestr(const char *haystack, const char *needle);
230 #define strlcpy gitstrlcpy
231 extern size_t gitstrlcpy(char *, const char *, size_t);
235 #define strtoumax gitstrtoumax
236 extern uintmax_t gitstrtoumax(const char *, char **, int);
240 #define hstrerror githstrerror
241 extern const char *githstrerror(int herror);
245 #define memmem gitmemmem
246 void *gitmemmem(const void *haystack, size_t haystacklen,
247 const void *needle, size_t needlelen);
250 #ifdef FREAD_READS_DIRECTORIES
254 #define fopen(a,b) git_fopen(a,b)
255 extern FILE *git_fopen(const char*, const char*);
258 #ifdef SNPRINTF_RETURNS_BOGUS
259 #define snprintf git_snprintf
260 extern int git_snprintf(char *str, size_t maxsize,
261 const char *format, ...);
262 #define vsnprintf git_vsnprintf
263 extern int git_vsnprintf(char *str, size_t maxsize,
264 const char *format, va_list ap);
267 #ifdef __GLIBC_PREREQ
268 #if __GLIBC_PREREQ(2, 1)
269 #define HAVE_STRCHRNUL
273 #ifndef HAVE_STRCHRNUL
274 #define strchrnul gitstrchrnul
275 static inline char *gitstrchrnul(const char *s, int c)
277 while (*s && *s != c)
283 extern void release_pack_memory(size_t, int);
285 extern char *xstrdup(const char *str);
286 extern void *xmalloc(size_t size);
287 extern void *xmemdupz(const void *data, size_t len);
288 extern char *xstrndup(const char *str, size_t len);
289 extern void *xrealloc(void *ptr, size_t size);
290 extern void *xcalloc(size_t nmemb, size_t size);
291 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
292 extern ssize_t xread(int fd, void *buf, size_t len);
293 extern ssize_t xwrite(int fd, const void *buf, size_t len);
294 extern int xdup(int fd);
295 extern FILE *xfdopen(int fd, const char *mode);
296 extern int xmkstemp(char *template);
298 static inline size_t xsize_t(off_t len)
303 static inline int has_extension(const char *filename, const char *ext)
305 size_t len = strlen(filename);
306 size_t extlen = strlen(ext);
307 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
310 /* Sane ctype - no locale, and works with signed chars */
317 extern unsigned char sane_ctype[256];
318 #define GIT_SPACE 0x01
319 #define GIT_DIGIT 0x02
320 #define GIT_ALPHA 0x04
321 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
322 #define isspace(x) sane_istest(x,GIT_SPACE)
323 #define isdigit(x) sane_istest(x,GIT_DIGIT)
324 #define isalpha(x) sane_istest(x,GIT_ALPHA)
325 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
326 #define tolower(x) sane_case((unsigned char)(x), 0x20)
327 #define toupper(x) sane_case((unsigned char)(x), 0)
329 static inline int sane_case(int x, int high)
331 if (sane_istest(x, GIT_ALPHA))
332 x = (x & ~0x20) | high;
336 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
342 ul = strtoul(s, &p, base);
343 if (errno || *p || p == s || (unsigned int) ul != ul)
349 static inline int strtol_i(char const *s, int base, int *result)
355 ul = strtol(s, &p, base);
356 if (errno || *p || p == s || (int) ul != ul)
362 #ifdef INTERNAL_QSORT
363 void git_qsort(void *base, size_t nmemb, size_t size,
364 int(*compar)(const void *, const void *));
365 #define qsort git_qsort
368 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
369 # define FORCE_DIR_SET_GID S_ISGID
371 # define FORCE_DIR_SET_GID 0