[thirdparty/git.git] / git-compat-util.h

#ifndef GIT_COMPAT_UTIL_H
#define GIT_COMPAT_UTIL_H

#define _FILE_OFFSET_BITS 64

#ifndef FLEX_ARRAY
/*
 * See if our compiler is known to support flexible array members.
 */
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
# define FLEX_ARRAY /* empty */
#elif defined(__GNUC__)
# if (__GNUC__ >= 3)
#  define FLEX_ARRAY /* empty */
# else
#  define FLEX_ARRAY 0 /* older GNU extension */
# endif
#endif

/*
 * Otherwise, default to safer but a bit wasteful traditional style
 */
#ifndef FLEX_ARRAY
# define FLEX_ARRAY 1
#endif
#endif

#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#define bitsizeof(x)  (CHAR_BIT * sizeof(x))

#ifdef __GNUC__
#define TYPEOF(x) (__typeof__(x))
#else
#define TYPEOF(x)
#endif

#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
#define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */

#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))

/* Approximation of the length of the decimal representation of this type. */
#define decimal_length(x)	((int)(sizeof(x) * 2.56 + 0.5) + 1)

#if defined(__sun__)
 /*
  * On Solaris, when _XOPEN_EXTENDED is set, its header file
  * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
  * setting to say we are XPG5 or XPG6.  Also on Solaris,
  * XPG6 programs must be compiled with a c99 compiler, while
  * non XPG6 programs must be compiled with a pre-c99 compiler.
  */
# if __STDC_VERSION__ - 0 >= 199901L
# define _XOPEN_SOURCE 600
# else
# define _XOPEN_SOURCE 500
# endif
#elif !defined(__APPLE__) && !defined(__FreeBSD__)  && !defined(__USLC__) && !defined(_M_UNIX) && !defined(sgi)
#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
#endif
#define _ALL_SOURCE 1
#define _GNU_SOURCE 1
#define _BSD_SOURCE 1
#define _NETBSD_SOURCE 1
#define _SGI_SOURCE 1

#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/time.h>
#include <time.h>
#include <signal.h>
#include <fnmatch.h>
#include <assert.h>
#include <regex.h>
#include <utime.h>
#ifndef __MINGW32__
#include <sys/wait.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#ifndef NO_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <pwd.h>
#include <inttypes.h>
#if defined(__CYGWIN__)
#undef _XOPEN_SOURCE
#include <grp.h>
#define _XOPEN_SOURCE 600
#include "compat/cygwin.h"
#else
#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
#include <grp.h>
#define _ALL_SOURCE 1
#endif
#else 	/* __MINGW32__ */
/* pull in Windows compatibility stuff */
#include "compat/mingw.h"
#endif	/* __MINGW32__ */

#ifndef NO_LIBGEN_H
#include <libgen.h>
#else
#define basename gitbasename
extern char *gitbasename(char *);
#endif

#ifndef NO_ICONV
#include <iconv.h>
#endif

#ifndef NO_OPENSSL
#include <openssl/ssl.h>
#include <openssl/err.h>
#endif

/* On most systems <limits.h> would have given us this, but
 * not on some systems (e.g. GNU/Hurd).
 */
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif

#ifndef PRIuMAX
#define PRIuMAX "llu"
#endif

#ifndef PRIu32
#define PRIu32 "u"
#endif

#ifndef PRIx32
#define PRIx32 "x"
#endif

#ifndef PATH_SEP
#define PATH_SEP ':'
#endif

#ifndef STRIP_EXTENSION
#define STRIP_EXTENSION ""
#endif

#ifndef has_dos_drive_prefix
#define has_dos_drive_prefix(path) 0
#endif

#ifndef is_dir_sep
#define is_dir_sep(c) ((c) == '/')
#endif

#ifdef __GNUC__
#define NORETURN __attribute__((__noreturn__))
#else
#define NORETURN
#ifndef __attribute__
#define __attribute__(x)
#endif
#endif

/* General helper functions */
extern void usage(const char *err) NORETURN;
extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
extern void die_errno(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));

extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);

extern int prefixcmp(const char *str, const char *prefix);
extern time_t tm_to_time_t(const struct tm *tm);

static inline const char *skip_prefix(const char *str, const char *prefix)
{
	size_t len = strlen(prefix);
	return strncmp(str, prefix, len) ? NULL : str + len;
}

#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)

#ifndef PROT_READ
#define PROT_READ 1
#define PROT_WRITE 2
#define MAP_PRIVATE 1
#define MAP_FAILED ((void*)-1)
#endif

#define mmap git_mmap
#define munmap git_munmap
extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
extern int git_munmap(void *start, size_t length);

#else /* NO_MMAP || USE_WIN32_MMAP */

#include <sys/mman.h>

#endif /* NO_MMAP || USE_WIN32_MMAP */

#ifdef NO_MMAP

/* This value must be multiple of (pagesize * 2) */
#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)

#else /* NO_MMAP */

/* This value must be multiple of (pagesize * 2) */
#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	(sizeof(void*) >= 8 \
		?  1 * 1024 * 1024 * 1024 \
		: 32 * 1024 * 1024)

#endif /* NO_MMAP */

#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
#define on_disk_bytes(st) ((st).st_size)
#else
#define on_disk_bytes(st) ((st).st_blocks * 512)
#endif

#define DEFAULT_PACKED_GIT_LIMIT \
	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))

#ifdef NO_PREAD
#define pread git_pread
extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
#endif
/*
 * Forward decl that will remind us if its twin in cache.h changes.
 * This function is used in compat/pread.c.  But we can't include
 * cache.h there.
 */
extern ssize_t read_in_full(int fd, void *buf, size_t count);

#ifdef NO_SETENV
#define setenv gitsetenv
extern int gitsetenv(const char *, const char *, int);
#endif

#ifdef NO_MKDTEMP
#define mkdtemp gitmkdtemp
extern char *gitmkdtemp(char *);
#endif

#ifdef NO_MKSTEMPS
#define mkstemps gitmkstemps
extern int gitmkstemps(char *, int);
#endif

#ifdef NO_UNSETENV
#define unsetenv gitunsetenv
extern void gitunsetenv(const char *);
#endif

#ifdef NO_STRCASESTR
#define strcasestr gitstrcasestr
extern char *gitstrcasestr(const char *haystack, const char *needle);
#endif

#ifdef NO_STRLCPY
#define strlcpy gitstrlcpy
extern size_t gitstrlcpy(char *, const char *, size_t);
#endif

#ifdef NO_STRTOUMAX
#define strtoumax gitstrtoumax
extern uintmax_t gitstrtoumax(const char *, char **, int);
#endif

#ifdef NO_HSTRERROR
#define hstrerror githstrerror
extern const char *githstrerror(int herror);
#endif

#ifdef NO_MEMMEM
#define memmem gitmemmem
void *gitmemmem(const void *haystack, size_t haystacklen,
                const void *needle, size_t needlelen);
#endif

#ifdef FREAD_READS_DIRECTORIES
#ifdef fopen
#undef fopen
#endif
#define fopen(a,b) git_fopen(a,b)
extern FILE *git_fopen(const char*, const char*);
#endif

#ifdef SNPRINTF_RETURNS_BOGUS
#define snprintf git_snprintf
extern int git_snprintf(char *str, size_t maxsize,
			const char *format, ...);
#define vsnprintf git_vsnprintf
extern int git_vsnprintf(char *str, size_t maxsize,
			 const char *format, va_list ap);
#endif

#ifdef __GLIBC_PREREQ
#if __GLIBC_PREREQ(2, 1)
#define HAVE_STRCHRNUL
#endif
#endif

#ifndef HAVE_STRCHRNUL
#define strchrnul gitstrchrnul
static inline char *gitstrchrnul(const char *s, int c)
{
	while (*s && *s != c)
		s++;
	return (char *)s;
}
#endif

extern void release_pack_memory(size_t, int);

extern char *xstrdup(const char *str);
extern void *xmalloc(size_t size);
extern void *xmemdupz(const void *data, size_t len);
extern char *xstrndup(const char *str, size_t len);
extern void *xrealloc(void *ptr, size_t size);
extern void *xcalloc(size_t nmemb, size_t size);
extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
extern ssize_t xread(int fd, void *buf, size_t len);
extern ssize_t xwrite(int fd, const void *buf, size_t len);
extern int xdup(int fd);
extern FILE *xfdopen(int fd, const char *mode);
extern int xmkstemp(char *template);
extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1);

static inline size_t xsize_t(off_t len)
{
	return (size_t)len;
}

static inline int has_extension(const char *filename, const char *ext)
{
	size_t len = strlen(filename);
	size_t extlen = strlen(ext);
	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
}

/* Sane ctype - no locale, and works with signed chars */
#undef isascii
#undef isspace
#undef isdigit
#undef isalpha
#undef isalnum
#undef tolower
#undef toupper
extern unsigned char sane_ctype[256];
#define GIT_SPACE 0x01
#define GIT_DIGIT 0x02
#define GIT_ALPHA 0x04
#define GIT_GLOB_SPECIAL 0x08
#define GIT_REGEX_SPECIAL 0x10
#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
#define isascii(x) (((x) & ~0x7f) == 0)
#define isspace(x) sane_istest(x,GIT_SPACE)
#define isdigit(x) sane_istest(x,GIT_DIGIT)
#define isalpha(x) sane_istest(x,GIT_ALPHA)
#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
#define tolower(x) sane_case((unsigned char)(x), 0x20)
#define toupper(x) sane_case((unsigned char)(x), 0)

static inline int sane_case(int x, int high)
{
	if (sane_istest(x, GIT_ALPHA))
		x = (x & ~0x20) | high;
	return x;
}

static inline int strtoul_ui(char const *s, int base, unsigned int *result)
{
	unsigned long ul;
	char *p;

	errno = 0;
	ul = strtoul(s, &p, base);
	if (errno || *p || p == s || (unsigned int) ul != ul)
		return -1;
	*result = ul;
	return 0;
}

static inline int strtol_i(char const *s, int base, int *result)
{
	long ul;
	char *p;

	errno = 0;
	ul = strtol(s, &p, base);
	if (errno || *p || p == s || (int) ul != ul)
		return -1;
	*result = ul;
	return 0;
}

#ifdef INTERNAL_QSORT
void git_qsort(void *base, size_t nmemb, size_t size,
	       int(*compar)(const void *, const void *));
#define qsort git_qsort
#endif

#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
# define FORCE_DIR_SET_GID S_ISGID
#else
# define FORCE_DIR_SET_GID 0
#endif

#ifdef NO_NSEC
#undef USE_NSEC
#define ST_CTIME_NSEC(st) 0
#define ST_MTIME_NSEC(st) 0
#else
#ifdef USE_ST_TIMESPEC
#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
#else
#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
#endif
#endif

#ifdef UNRELIABLE_FSTAT
#define fstat_is_reliable() 0
#else
#define fstat_is_reliable() 1
#endif

/*
 * Preserves errno, prints a message, but gives no warning for ENOENT.
 * Always returns the return value of unlink(2).
 */
int unlink_or_warn(const char *path);

#endif
Commit	Line	Data
4050c0df JH	1	#ifndef GIT_COMPAT_UTIL_H
	2	#define GIT_COMPAT_UTIL_H
	3
b97e9116 MW	4	#define _FILE_OFFSET_BITS 64
b97e9116 MW	5
8f1d2e6f	6	#ifndef FLEX_ARRAY
8e973991 JH	7	/*
	8	* See if our compiler is known to support flexible array members.
	9	*/
203ee91f	10	#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) \|\| (__SUNPRO_C > 0x580))
8e973991 JH	11	# define FLEX_ARRAY /* empty */
	12	#elif defined(__GNUC__)
	13	# if (__GNUC__ >= 3)
	14	# define FLEX_ARRAY /* empty */
	15	# else
	16	# define FLEX_ARRAY 0 /* older GNU extension */
	17	# endif
	18	#endif
	19
	20	/*
	21	* Otherwise, default to safer but a bit wasteful traditional style
	22	*/
	23	#ifndef FLEX_ARRAY
	24	# define FLEX_ARRAY 1
8f1d2e6f JH	25	#endif
	26	#endif
	27
b4f2a6ac	28	#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
f630cfda	29	#define bitsizeof(x) (CHAR_BIT * sizeof(x))
b4f2a6ac	30
8723f216 NP	31	#ifdef __GNUC__
	32	#define TYPEOF(x) (__typeof__(x))
	33	#else
	34	#define TYPEOF(x)
	35	#endif
	36
f630cfda	37	#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
db7244bd	38	#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
8723f216	39
98cb6f30 PH	40	#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
98cb6f30 PH	41
cf606e3d AW	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)
	44
4cb18a49 BC	45	#if defined(__sun__)
	46	/*
	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.
	52	*/
	53	# if __STDC_VERSION__ - 0 >= 199901L
	54	# define _XOPEN_SOURCE 600
	55	# else
	56	# define _XOPEN_SOURCE 500
	57	# endif
9398b859	58	#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX) && !defined(sgi)
85023577 JH	59	#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
85023577 JH	60	#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a6	61	#endif
fb952206 JR	62	#define _ALL_SOURCE 1
	63	#define _GNU_SOURCE 1
	64	#define _BSD_SOURCE 1
9a695fbf	65	#define _NETBSD_SOURCE 1
9398b859	66	#define _SGI_SOURCE 1
85023577	67
4050c0df JH	68	#include <unistd.h>
	69	#include <stdio.h>
	70	#include <sys/stat.h>
	71	#include <fcntl.h>
	72	#include <stddef.h>
	73	#include <stdlib.h>
	74	#include <stdarg.h>
	75	#include <string.h>
	76	#include <errno.h>
	77	#include <limits.h>
	78	#include <sys/param.h>
4050c0df JH	79	#include <sys/types.h>
4050c0df JH	80	#include <dirent.h>
85023577 JH	81	#include <sys/time.h>
	82	#include <time.h>
	83	#include <signal.h>
85023577	84	#include <fnmatch.h>
f4626df5 JS	85	#include <assert.h>
	86	#include <regex.h>
	87	#include <utime.h>
	88	#ifndef __MINGW32__
	89	#include <sys/wait.h>
85023577 JH	90	#include <sys/poll.h>
85023577 JH	91	#include <sys/socket.h>
80bbe72b	92	#include <sys/ioctl.h>
2600973f	93	#ifndef NO_SYS_SELECT_H
80bbe72b	94	#include <sys/select.h>
2600973f	95	#endif
85023577 JH	96	#include <netinet/in.h>
	97	#include <netinet/tcp.h>
	98	#include <arpa/inet.h>
	99	#include <netdb.h>
	100	#include <pwd.h>
007e2ba6	101	#include <inttypes.h>
41b20017 RJ	102	#if defined(__CYGWIN__)
	103	#undef _XOPEN_SOURCE
	104	#include <grp.h>
	105	#define _XOPEN_SOURCE 600
adbc0b6b	106	#include "compat/cygwin.h"
41b20017	107	#else
fb952206	108	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577	109	#include <grp.h>
fb952206	110	#define _ALL_SOURCE 1
41b20017	111	#endif
f4626df5 JS	112	#else /* __MINGW32__ */
	113	/* pull in Windows compatibility stuff */
	114	#include "compat/mingw.h"
	115	#endif /* __MINGW32__ */
85023577	116
e1c06886 DA	117	#ifndef NO_LIBGEN_H
	118	#include <libgen.h>
	119	#else
	120	#define basename gitbasename
	121	extern char gitbasename(char );
	122	#endif
	123
85023577 JH	124	#ifndef NO_ICONV
	125	#include <iconv.h>
	126	#endif
4050c0df	127
684ec6c6 RS	128	#ifndef NO_OPENSSL
	129	#include <openssl/ssl.h>
	130	#include <openssl/err.h>
	131	#endif
	132
d0c2449f JH	133	/* On most systems <limits.h> would have given us this, but
	134	* not on some systems (e.g. GNU/Hurd).
	135	*/
	136	#ifndef PATH_MAX
	137	#define PATH_MAX 4096
	138	#endif
	139
c4001d92 SP	140	#ifndef PRIuMAX
	141	#define PRIuMAX "llu"
	142	#endif
	143
607bb3ff JS	144	#ifndef PRIu32
	145	#define PRIu32 "u"
	146	#endif
	147
	148	#ifndef PRIx32
	149	#define PRIx32 "x"
	150	#endif
	151
80ba074f JS	152	#ifndef PATH_SEP
	153	#define PATH_SEP ':'
	154	#endif
	155
23326d14 JS	156	#ifndef STRIP_EXTENSION
	157	#define STRIP_EXTENSION ""
	158	#endif
	159
25fe217b JS	160	#ifndef has_dos_drive_prefix
	161	#define has_dos_drive_prefix(path) 0
	162	#endif
	163
	164	#ifndef is_dir_sep
	165	#define is_dir_sep(c) ((c) == '/')
	166	#endif
	167
4050c0df JH	168	#ifdef __GNUC__
	169	#define NORETURN __attribute__((__noreturn__))
	170	#else
	171	#define NORETURN
	172	#ifndef __attribute__
	173	#define __attribute__(x)
	174	#endif
	175	#endif
	176
	177	/* General helper functions */
	178	extern void usage(const char *err) NORETURN;
	179	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
b875036e	180	extern void die_errno(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
4050c0df	181	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9	182	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df	183
39a3f5ea	184	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
39a3f5ea	185
698a68be	186	extern int prefixcmp(const char str, const char prefix);
bb5799d6	187	extern time_t tm_to_time_t(const struct tm *tm);
698a68be	188
fbca5837 MV	189	static inline const char skip_prefix(const char str, const char *prefix)
	190	{
	191	size_t len = strlen(prefix);
	192	return strncmp(str, prefix, len) ? NULL : str + len;
	193	}
	194
b130a72b	195	#if defined(NO_MMAP) \|\| defined(USE_WIN32_MMAP)
4050c0df JH	196
	197	#ifndef PROT_READ
	198	#define PROT_READ 1
	199	#define PROT_WRITE 2
	200	#define MAP_PRIVATE 1
	201	#define MAP_FAILED ((void*)-1)
	202	#endif
	203
d6779124 SP	204	#define mmap git_mmap
	205	#define munmap git_munmap
	206	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	207	extern int git_munmap(void *start, size_t length);
4050c0df	208
b130a72b JL	209	#else /* NO_MMAP \|\| USE_WIN32_MMAP */
	210
	211	#include <sys/mman.h>
	212
	213	#endif /* NO_MMAP \|\| USE_WIN32_MMAP */
	214
	215	#ifdef NO_MMAP
	216
5faaf246	217	/* This value must be multiple of (pagesize * 2) */
8c82534d SP	218	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
8c82534d SP	219
4050c0df JH	220	#else /* NO_MMAP */
4050c0df JH	221
5faaf246	222	/* This value must be multiple of (pagesize * 2) */
22bac0ea SP	223	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	224	(sizeof(void*) >= 8 \
	225	? 1 * 1024 * 1024 * 1024 \
	226	: 32 * 1024 * 1024)
4050c0df JH	227
	228	#endif /* NO_MMAP */
	229
fdb2a2a6 JH	230	#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
	231	#define on_disk_bytes(st) ((st).st_size)
	232	#else
	233	#define on_disk_bytes(st) ((st).st_blocks * 512)
	234	#endif
	235
22bac0ea	236	#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a	237	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d	238
6900679c SH	239	#ifdef NO_PREAD
	240	#define pread git_pread
	241	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	242	#endif
14086b0a SP	243	/*
	244	* Forward decl that will remind us if its twin in cache.h changes.
	245	* This function is used in compat/pread.c. But we can't include
	246	* cache.h there.
	247	*/
	248	extern ssize_t read_in_full(int fd, void *buf, size_t count);
6900679c	249
4050c0df JH	250	#ifdef NO_SETENV
	251	#define setenv gitsetenv
	252	extern int gitsetenv(const char , const char , int);
	253	#endif
	254
ca5bb5d5 SP	255	#ifdef NO_MKDTEMP
	256	#define mkdtemp gitmkdtemp
	257	extern char gitmkdtemp(char );
	258	#endif
	259
0620b39b DA	260	#ifdef NO_MKSTEMPS
	261	#define mkstemps gitmkstemps
	262	extern int gitmkstemps(char *, int);
	263	#endif
	264
731043fd JR	265	#ifdef NO_UNSETENV
	266	#define unsetenv gitunsetenv
	267	extern void gitunsetenv(const char *);
	268	#endif
	269
4050c0df JH	270	#ifdef NO_STRCASESTR
	271	#define strcasestr gitstrcasestr
	272	extern char gitstrcasestr(const char haystack, const char *needle);
	273	#endif
	274
817151e6 PE	275	#ifdef NO_STRLCPY
	276	#define strlcpy gitstrlcpy
	277	extern size_t gitstrlcpy(char , const char , size_t);
	278	#endif
	279
bc6b4f52 JR	280	#ifdef NO_STRTOUMAX
	281	#define strtoumax gitstrtoumax
	282	extern uintmax_t gitstrtoumax(const char , char *, int);
	283	#endif
	284
fa0c87c3 AR	285	#ifdef NO_HSTRERROR
	286	#define hstrerror githstrerror
	287	extern const char *githstrerror(int herror);
	288	#endif
	289
b21b9f1d RS	290	#ifdef NO_MEMMEM
	291	#define memmem gitmemmem
	292	void gitmemmem(const void haystack, size_t haystacklen,
	293	const void *needle, size_t needlelen);
	294	#endif
	295
cba22528	296	#ifdef FREAD_READS_DIRECTORIES
c5445fe0 JS	297	#ifdef fopen
	298	#undef fopen
	299	#endif
cba22528 BC	300	#define fopen(a,b) git_fopen(a,b)
	301	extern FILE git_fopen(const char, const char*);
	302	#endif
	303
c4582f93 MR	304	#ifdef SNPRINTF_RETURNS_BOGUS
	305	#define snprintf git_snprintf
	306	extern int git_snprintf(char *str, size_t maxsize,
	307	const char *format, ...);
	308	#define vsnprintf git_vsnprintf
	309	extern int git_vsnprintf(char *str, size_t maxsize,
	310	const char *format, va_list ap);
	311	#endif
	312
726c8ef5 JS	313	#ifdef __GLIBC_PREREQ
	314	#if __GLIBC_PREREQ(2, 1)
	315	#define HAVE_STRCHRNUL
	316	#endif
	317	#endif
	318
	319	#ifndef HAVE_STRCHRNUL
659c69cf	320	#define strchrnul gitstrchrnul
9e79f00f AE	321	static inline char gitstrchrnul(const char s, int c)
	322	{
	323	while (s && s != c)
	324	s++;
	325	return (char *)s;
	326	}
659c69cf RS	327	#endif
659c69cf RS	328
d1efefa4	329	extern void release_pack_memory(size_t, int);
97bfeb34	330
112db553 LT	331	extern char xstrdup(const char str);
	332	extern void *xmalloc(size_t size);
	333	extern void xmemdupz(const void data, size_t len);
	334	extern char xstrndup(const char str, size_t len);
	335	extern void xrealloc(void ptr, size_t size);
	336	extern void *xcalloc(size_t nmemb, size_t size);
	337	extern void xmmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	338	extern ssize_t xread(int fd, void *buf, size_t len);
	339	extern ssize_t xwrite(int fd, const void *buf, size_t len);
	340	extern int xdup(int fd);
	341	extern FILE xfdopen(int fd, const char mode);
	342	extern int xmkstemp(char *template);
6e180cdc JH	343	extern int odb_mkstemp(char template, size_t limit, const char pattern);
6e180cdc JH	344	extern int odb_pack_keep(char name, size_t namesz, unsigned char sha1);
f21a47b2	345
dc49cd76 SP	346	static inline size_t xsize_t(off_t len)
	347	{
	348	return (size_t)len;
	349	}
	350
5bb1cda5	351	static inline int has_extension(const char filename, const char ext)
83a2b841	352	{
5bb1cda5 RS	353	size_t len = strlen(filename);
5bb1cda5 RS	354	size_t extlen = strlen(ext);
83a2b841 RS	355	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	356	}
	357
4050c0df	358	/* Sane ctype - no locale, and works with signed chars */
c2e9364a	359	#undef isascii
4050c0df JH	360	#undef isspace
	361	#undef isdigit
	362	#undef isalpha
	363	#undef isalnum
	364	#undef tolower
	365	#undef toupper
	366	extern unsigned char sane_ctype[256];
	367	#define GIT_SPACE 0x01
	368	#define GIT_DIGIT 0x02
	369	#define GIT_ALPHA 0x04
8cc32992	370	#define GIT_GLOB_SPECIAL 0x08
f9b7cce6	371	#define GIT_REGEX_SPECIAL 0x10
4050c0df	372	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
c2e9364a	373	#define isascii(x) (((x) & ~0x7f) == 0)
4050c0df JH	374	#define isspace(x) sane_istest(x,GIT_SPACE)
	375	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	376	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	377	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
8cc32992	378	#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
f9b7cce6	379	#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL \| GIT_REGEX_SPECIAL)
4050c0df JH	380	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	381	#define toupper(x) sane_case((unsigned char)(x), 0)
	382
	383	static inline int sane_case(int x, int high)
	384	{
	385	if (sane_istest(x, GIT_ALPHA))
	386	x = (x & ~0x20) \| high;
	387	return x;
	388	}
	389
6aead43d JM	390	static inline int strtoul_ui(char const s, int base, unsigned int result)
	391	{
	392	unsigned long ul;
	393	char *p;
	394
	395	errno = 0;
	396	ul = strtoul(s, &p, base);
	397	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	398	return -1;
	399	*result = ul;
	400	return 0;
	401	}
	402
7791ecbc JH	403	static inline int strtol_i(char const s, int base, int result)
	404	{
	405	long ul;
	406	char *p;
	407
	408	errno = 0;
	409	ul = strtol(s, &p, base);
	410	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	411	return -1;
	412	*result = ul;
	413	return 0;
	414	}
	415
43fe901b BD	416	#ifdef INTERNAL_QSORT
	417	void git_qsort(void *base, size_t nmemb, size_t size,
	418	int(compar)(const void , const void *));
	419	#define qsort git_qsort
	420	#endif
	421
81a24b52 AR	422	#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
	423	# define FORCE_DIR_SET_GID S_ISGID
	424	#else
	425	# define FORCE_DIR_SET_GID 0
	426	#endif
	427
c06ff490 KB	428	#ifdef NO_NSEC
	429	#undef USE_NSEC
	430	#define ST_CTIME_NSEC(st) 0
	431	#define ST_MTIME_NSEC(st) 0
	432	#else
c567383b BG	433	#ifdef USE_ST_TIMESPEC
	434	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
	435	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
	436	#else
c06ff490 KB	437	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
	438	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
	439	#endif
c567383b	440	#endif
c06ff490	441
34779c53 JS	442	#ifdef UNRELIABLE_FSTAT
	443	#define fstat_is_reliable() 0
	444	#else
	445	#define fstat_is_reliable() 1
	446	#endif
	447
fc71db39 AR	448	/*
	449	* Preserves errno, prints a message, but gives no warning for ENOENT.
	450	* Always returns the return value of unlink(2).
	451	*/
	452	int unlink_or_warn(const char *path);
	453
4050c0df	454	#endif