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) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
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]))
29 #define bitsizeof(x) (CHAR_BIT * sizeof(x))
32 #define TYPEOF(x) (__typeof__(x))
37 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
38 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
40 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
42 /* Approximation of the length of the decimal representation of this type. */
43 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
47 * On Solaris, when _XOPEN_EXTENDED is set, its header file
48 * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
49 * setting to say we are XPG5 or XPG6. Also on Solaris,
50 * XPG6 programs must be compiled with a c99 compiler, while
51 * non XPG6 programs must be compiled with a pre-c99 compiler.
53 # if __STDC_VERSION__ - 0 >= 199901L
54 # define _XOPEN_SOURCE 600
56 # define _XOPEN_SOURCE 500
58 #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX) && !defined(sgi)
59 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
60 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
65 #define _NETBSD_SOURCE 1
68 #ifdef WIN32 /* Both MinGW and MSVC */
69 #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
84 #include <sys/param.h>
85 #include <sys/types.h>
97 #include <sys/socket.h>
98 #include <sys/ioctl.h>
100 #ifndef NO_SYS_SELECT_H
101 #include <sys/select.h>
103 #include <netinet/in.h>
104 #include <netinet/tcp.h>
105 #include <arpa/inet.h>
108 #include <inttypes.h>
109 #if defined(__CYGWIN__)
112 #define _XOPEN_SOURCE 600
113 #include "compat/cygwin.h"
115 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
117 #define _ALL_SOURCE 1
119 #else /* __MINGW32__ */
120 /* pull in Windows compatibility stuff */
121 #include "compat/mingw.h"
122 #endif /* __MINGW32__ */
124 #include "compat/msvc.h"
130 #define basename gitbasename
131 extern char *gitbasename(char *);
139 #include <openssl/ssl.h>
140 #include <openssl/err.h>
143 /* On most systems <limits.h> would have given us this, but
144 * not on some systems (e.g. GNU/Hurd).
147 #define PATH_MAX 4096
151 #define PRIuMAX "llu"
166 #ifndef STRIP_EXTENSION
167 #define STRIP_EXTENSION ""
170 #ifndef has_dos_drive_prefix
171 #define has_dos_drive_prefix(path) 0
175 #define is_dir_sep(c) ((c) == '/')
179 #define NORETURN __attribute__((__noreturn__))
180 #define NORETURN_PTR __attribute__((__noreturn__))
181 #elif defined(_MSC_VER)
182 #define NORETURN __declspec(noreturn)
187 #ifndef __attribute__
188 #define __attribute__(x)
192 #include "compat/bswap.h"
194 /* General helper functions */
195 extern NORETURN void usage(const char *err);
196 extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
197 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
198 extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
199 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
200 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
202 extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
204 extern int prefixcmp(const char *str, const char *prefix);
205 extern int suffixcmp(const char *str, const char *suffix);
207 static inline const char *skip_prefix(const char *str, const char *prefix)
209 size_t len = strlen(prefix);
210 return strncmp(str, prefix, len) ? NULL : str + len;
213 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
218 #define MAP_PRIVATE 1
219 #define MAP_FAILED ((void*)-1)
222 #define mmap git_mmap
223 #define munmap git_munmap
224 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
225 extern int git_munmap(void *start, size_t length);
227 #else /* NO_MMAP || USE_WIN32_MMAP */
229 #include <sys/mman.h>
231 #endif /* NO_MMAP || USE_WIN32_MMAP */
235 /* This value must be multiple of (pagesize * 2) */
236 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
240 /* This value must be multiple of (pagesize * 2) */
241 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
242 (sizeof(void*) >= 8 \
243 ? 1 * 1024 * 1024 * 1024 \
248 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
249 #define on_disk_bytes(st) ((st).st_size)
251 #define on_disk_bytes(st) ((st).st_blocks * 512)
254 #define DEFAULT_PACKED_GIT_LIMIT \
255 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
258 #define pread git_pread
259 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
262 * Forward decl that will remind us if its twin in cache.h changes.
263 * This function is used in compat/pread.c. But we can't include
266 extern ssize_t read_in_full(int fd, void *buf, size_t count);
269 #define setenv gitsetenv
270 extern int gitsetenv(const char *, const char *, int);
274 #define mkdtemp gitmkdtemp
275 extern char *gitmkdtemp(char *);
279 #define mkstemps gitmkstemps
280 extern int gitmkstemps(char *, int);
284 #define unsetenv gitunsetenv
285 extern void gitunsetenv(const char *);
289 #define strcasestr gitstrcasestr
290 extern char *gitstrcasestr(const char *haystack, const char *needle);
294 #define strlcpy gitstrlcpy
295 extern size_t gitstrlcpy(char *, const char *, size_t);
299 #define strtoumax gitstrtoumax
300 extern uintmax_t gitstrtoumax(const char *, char **, int);
304 #define hstrerror githstrerror
305 extern const char *githstrerror(int herror);
309 #define memmem gitmemmem
310 void *gitmemmem(const void *haystack, size_t haystacklen,
311 const void *needle, size_t needlelen);
314 #ifdef FREAD_READS_DIRECTORIES
318 #define fopen(a,b) git_fopen(a,b)
319 extern FILE *git_fopen(const char*, const char*);
322 #ifdef SNPRINTF_RETURNS_BOGUS
323 #define snprintf git_snprintf
324 extern int git_snprintf(char *str, size_t maxsize,
325 const char *format, ...);
326 #define vsnprintf git_vsnprintf
327 extern int git_vsnprintf(char *str, size_t maxsize,
328 const char *format, va_list ap);
331 #ifdef __GLIBC_PREREQ
332 #if __GLIBC_PREREQ(2, 1)
333 #define HAVE_STRCHRNUL
337 #ifndef HAVE_STRCHRNUL
338 #define strchrnul gitstrchrnul
339 static inline char *gitstrchrnul(const char *s, int c)
341 while (*s && *s != c)
347 extern void release_pack_memory(size_t, int);
349 extern char *xstrdup(const char *str);
350 extern void *xmalloc(size_t size);
351 extern void *xmallocz(size_t size);
352 extern void *xmemdupz(const void *data, size_t len);
353 extern char *xstrndup(const char *str, size_t len);
354 extern void *xrealloc(void *ptr, size_t size);
355 extern void *xcalloc(size_t nmemb, size_t size);
356 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
357 extern ssize_t xread(int fd, void *buf, size_t len);
358 extern ssize_t xwrite(int fd, const void *buf, size_t len);
359 extern int xdup(int fd);
360 extern FILE *xfdopen(int fd, const char *mode);
361 extern int xmkstemp(char *template);
362 extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
363 extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1);
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 */
385 extern unsigned char sane_ctype[256];
386 #define GIT_SPACE 0x01
387 #define GIT_DIGIT 0x02
388 #define GIT_ALPHA 0x04
389 #define GIT_GLOB_SPECIAL 0x08
390 #define GIT_REGEX_SPECIAL 0x10
391 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
392 #define isascii(x) (((x) & ~0x7f) == 0)
393 #define isspace(x) sane_istest(x,GIT_SPACE)
394 #define isdigit(x) sane_istest(x,GIT_DIGIT)
395 #define isalpha(x) sane_istest(x,GIT_ALPHA)
396 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
397 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
398 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
399 #define tolower(x) sane_case((unsigned char)(x), 0x20)
400 #define toupper(x) sane_case((unsigned char)(x), 0)
402 static inline int sane_case(int x, int high)
404 if (sane_istest(x, GIT_ALPHA))
405 x = (x & ~0x20) | high;
409 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
415 ul = strtoul(s, &p, base);
416 if (errno || *p || p == s || (unsigned int) ul != ul)
422 static inline int strtol_i(char const *s, int base, int *result)
428 ul = strtol(s, &p, base);
429 if (errno || *p || p == s || (int) ul != ul)
435 #ifdef INTERNAL_QSORT
436 void git_qsort(void *base, size_t nmemb, size_t size,
437 int(*compar)(const void *, const void *));
438 #define qsort git_qsort
441 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
442 # define FORCE_DIR_SET_GID S_ISGID
444 # define FORCE_DIR_SET_GID 0
449 #define ST_CTIME_NSEC(st) 0
450 #define ST_MTIME_NSEC(st) 0
452 #ifdef USE_ST_TIMESPEC
453 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
454 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
456 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
457 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
461 #ifdef UNRELIABLE_FSTAT
462 #define fstat_is_reliable() 0
464 #define fstat_is_reliable() 1
468 * Preserves errno, prints a message, but gives no warning for ENOENT.
469 * Always returns the return value of unlink(2).
471 int unlink_or_warn(const char *path);