[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)
# 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]))

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

#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
#define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */

/* 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(__APPLE__) && !defined(__FreeBSD__)  && !defined(__USLC__) && !defined(_M_UNIX)
#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

#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_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 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	*/
	10	#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
	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 JH	28	#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
b4f2a6ac JH	29
8723f216 NP	30	#ifdef __GNUC__
	31	#define TYPEOF(x) (__typeof__(x))
	32	#else
	33	#define TYPEOF(x)
	34	#endif
	35
	36	#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
db7244bd	37	#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
8723f216	38
cf606e3d AW	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)
	41
457bb452	42	#if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX)
85023577 JH	43	#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
85023577 JH	44	#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a6	45	#endif
fb952206 JR	46	#define _ALL_SOURCE 1
	47	#define _GNU_SOURCE 1
	48	#define _BSD_SOURCE 1
9a695fbf	49	#define _NETBSD_SOURCE 1
85023577	50
4050c0df JH	51	#include <unistd.h>
	52	#include <stdio.h>
	53	#include <sys/stat.h>
	54	#include <fcntl.h>
	55	#include <stddef.h>
	56	#include <stdlib.h>
	57	#include <stdarg.h>
	58	#include <string.h>
	59	#include <errno.h>
	60	#include <limits.h>
	61	#include <sys/param.h>
4050c0df JH	62	#include <sys/types.h>
4050c0df JH	63	#include <dirent.h>
85023577 JH	64	#include <sys/time.h>
	65	#include <time.h>
	66	#include <signal.h>
85023577	67	#include <fnmatch.h>
f4626df5 JS	68	#include <assert.h>
	69	#include <regex.h>
	70	#include <utime.h>
	71	#ifndef __MINGW32__
	72	#include <sys/wait.h>
85023577 JH	73	#include <sys/poll.h>
85023577 JH	74	#include <sys/socket.h>
80bbe72b	75	#include <sys/ioctl.h>
2600973f	76	#ifndef NO_SYS_SELECT_H
80bbe72b	77	#include <sys/select.h>
2600973f	78	#endif
85023577 JH	79	#include <netinet/in.h>
	80	#include <netinet/tcp.h>
	81	#include <arpa/inet.h>
	82	#include <netdb.h>
	83	#include <pwd.h>
007e2ba6	84	#include <inttypes.h>
41b20017 RJ	85	#if defined(__CYGWIN__)
	86	#undef _XOPEN_SOURCE
	87	#include <grp.h>
	88	#define _XOPEN_SOURCE 600
adbc0b6b	89	#include "compat/cygwin.h"
41b20017	90	#else
fb952206	91	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577	92	#include <grp.h>
fb952206	93	#define _ALL_SOURCE 1
41b20017	94	#endif
f4626df5 JS	95	#else /* __MINGW32__ */
	96	/* pull in Windows compatibility stuff */
	97	#include "compat/mingw.h"
	98	#endif /* __MINGW32__ */
85023577 JH	99
	100	#ifndef NO_ICONV
	101	#include <iconv.h>
	102	#endif
4050c0df	103
684ec6c6 RS	104	#ifndef NO_OPENSSL
	105	#include <openssl/ssl.h>
	106	#include <openssl/err.h>
	107	#endif
	108
d0c2449f JH	109	/* On most systems <limits.h> would have given us this, but
	110	* not on some systems (e.g. GNU/Hurd).
	111	*/
	112	#ifndef PATH_MAX
	113	#define PATH_MAX 4096
	114	#endif
	115
c4001d92 SP	116	#ifndef PRIuMAX
	117	#define PRIuMAX "llu"
	118	#endif
	119
607bb3ff JS	120	#ifndef PRIu32
	121	#define PRIu32 "u"
	122	#endif
	123
	124	#ifndef PRIx32
	125	#define PRIx32 "x"
	126	#endif
	127
80ba074f JS	128	#ifndef PATH_SEP
	129	#define PATH_SEP ':'
	130	#endif
	131
23326d14 JS	132	#ifndef STRIP_EXTENSION
	133	#define STRIP_EXTENSION ""
	134	#endif
	135
25fe217b JS	136	#ifndef has_dos_drive_prefix
	137	#define has_dos_drive_prefix(path) 0
	138	#endif
	139
	140	#ifndef is_dir_sep
	141	#define is_dir_sep(c) ((c) == '/')
	142	#endif
	143
4050c0df JH	144	#ifdef __GNUC__
	145	#define NORETURN __attribute__((__noreturn__))
	146	#else
	147	#define NORETURN
	148	#ifndef __attribute__
	149	#define __attribute__(x)
	150	#endif
	151	#endif
	152
	153	/* General helper functions */
	154	extern void usage(const char *err) NORETURN;
	155	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	156	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9	157	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df	158
39a3f5ea	159	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
39a3f5ea	160
698a68be	161	extern int prefixcmp(const char str, const char prefix);
bb5799d6	162	extern time_t tm_to_time_t(const struct tm *tm);
698a68be	163
fbca5837 MV	164	static inline const char skip_prefix(const char str, const char *prefix)
	165	{
	166	size_t len = strlen(prefix);
	167	return strncmp(str, prefix, len) ? NULL : str + len;
	168	}
	169
b130a72b	170	#if defined(NO_MMAP) \|\| defined(USE_WIN32_MMAP)
4050c0df JH	171
	172	#ifndef PROT_READ
	173	#define PROT_READ 1
	174	#define PROT_WRITE 2
	175	#define MAP_PRIVATE 1
	176	#define MAP_FAILED ((void*)-1)
	177	#endif
	178
d6779124 SP	179	#define mmap git_mmap
	180	#define munmap git_munmap
	181	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	182	extern int git_munmap(void *start, size_t length);
4050c0df	183
b130a72b JL	184	#else /* NO_MMAP \|\| USE_WIN32_MMAP */
	185
	186	#include <sys/mman.h>
	187
	188	#endif /* NO_MMAP \|\| USE_WIN32_MMAP */
	189
	190	#ifdef NO_MMAP
	191
5faaf246	192	/* This value must be multiple of (pagesize * 2) */
8c82534d SP	193	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
8c82534d SP	194
4050c0df JH	195	#else /* NO_MMAP */
4050c0df JH	196
5faaf246	197	/* This value must be multiple of (pagesize * 2) */
22bac0ea SP	198	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	199	(sizeof(void*) >= 8 \
	200	? 1 * 1024 * 1024 * 1024 \
	201	: 32 * 1024 * 1024)
4050c0df JH	202
	203	#endif /* NO_MMAP */
	204
fdb2a2a6 JH	205	#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
	206	#define on_disk_bytes(st) ((st).st_size)
	207	#else
	208	#define on_disk_bytes(st) ((st).st_blocks * 512)
	209	#endif
	210
22bac0ea	211	#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a	212	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d	213
6900679c SH	214	#ifdef NO_PREAD
	215	#define pread git_pread
	216	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	217	#endif
14086b0a SP	218	/*
	219	* Forward decl that will remind us if its twin in cache.h changes.
	220	* This function is used in compat/pread.c. But we can't include
	221	* cache.h there.
	222	*/
	223	extern ssize_t read_in_full(int fd, void *buf, size_t count);
6900679c	224
4050c0df JH	225	#ifdef NO_SETENV
	226	#define setenv gitsetenv
	227	extern int gitsetenv(const char , const char , int);
	228	#endif
	229
ca5bb5d5 SP	230	#ifdef NO_MKDTEMP
	231	#define mkdtemp gitmkdtemp
	232	extern char gitmkdtemp(char );
	233	#endif
	234
0620b39b DA	235	#ifdef NO_MKSTEMPS
	236	#define mkstemps gitmkstemps
	237	extern int gitmkstemps(char *, int);
	238	#endif
	239
731043fd JR	240	#ifdef NO_UNSETENV
	241	#define unsetenv gitunsetenv
	242	extern void gitunsetenv(const char *);
	243	#endif
	244
4050c0df JH	245	#ifdef NO_STRCASESTR
	246	#define strcasestr gitstrcasestr
	247	extern char gitstrcasestr(const char haystack, const char *needle);
	248	#endif
	249
817151e6 PE	250	#ifdef NO_STRLCPY
	251	#define strlcpy gitstrlcpy
	252	extern size_t gitstrlcpy(char , const char , size_t);
	253	#endif
	254
bc6b4f52 JR	255	#ifdef NO_STRTOUMAX
	256	#define strtoumax gitstrtoumax
	257	extern uintmax_t gitstrtoumax(const char , char *, int);
	258	#endif
	259
fa0c87c3 AR	260	#ifdef NO_HSTRERROR
	261	#define hstrerror githstrerror
	262	extern const char *githstrerror(int herror);
	263	#endif
	264
b21b9f1d RS	265	#ifdef NO_MEMMEM
	266	#define memmem gitmemmem
	267	void gitmemmem(const void haystack, size_t haystacklen,
	268	const void *needle, size_t needlelen);
	269	#endif
	270
cba22528	271	#ifdef FREAD_READS_DIRECTORIES
c5445fe0 JS	272	#ifdef fopen
	273	#undef fopen
	274	#endif
cba22528 BC	275	#define fopen(a,b) git_fopen(a,b)
	276	extern FILE git_fopen(const char, const char*);
	277	#endif
	278
c4582f93 MR	279	#ifdef SNPRINTF_RETURNS_BOGUS
	280	#define snprintf git_snprintf
	281	extern int git_snprintf(char *str, size_t maxsize,
	282	const char *format, ...);
	283	#define vsnprintf git_vsnprintf
	284	extern int git_vsnprintf(char *str, size_t maxsize,
	285	const char *format, va_list ap);
	286	#endif
	287
726c8ef5 JS	288	#ifdef __GLIBC_PREREQ
	289	#if __GLIBC_PREREQ(2, 1)
	290	#define HAVE_STRCHRNUL
	291	#endif
	292	#endif
	293
	294	#ifndef HAVE_STRCHRNUL
659c69cf	295	#define strchrnul gitstrchrnul
9e79f00f AE	296	static inline char gitstrchrnul(const char s, int c)
	297	{
	298	while (s && s != c)
	299	s++;
	300	return (char *)s;
	301	}
659c69cf RS	302	#endif
659c69cf RS	303
d1efefa4	304	extern void release_pack_memory(size_t, int);
97bfeb34	305
112db553 LT	306	extern char xstrdup(const char str);
	307	extern void *xmalloc(size_t size);
	308	extern void xmemdupz(const void data, size_t len);
	309	extern char xstrndup(const char str, size_t len);
	310	extern void xrealloc(void ptr, size_t size);
	311	extern void *xcalloc(size_t nmemb, size_t size);
	312	extern void xmmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	313	extern ssize_t xread(int fd, void *buf, size_t len);
	314	extern ssize_t xwrite(int fd, const void *buf, size_t len);
	315	extern int xdup(int fd);
	316	extern FILE xfdopen(int fd, const char mode);
	317	extern int xmkstemp(char *template);
6e180cdc JH	318	extern int odb_mkstemp(char template, size_t limit, const char pattern);
6e180cdc JH	319	extern int odb_pack_keep(char name, size_t namesz, unsigned char sha1);
f21a47b2	320
dc49cd76 SP	321	static inline size_t xsize_t(off_t len)
	322	{
	323	return (size_t)len;
	324	}
	325
5bb1cda5	326	static inline int has_extension(const char filename, const char ext)
83a2b841	327	{
5bb1cda5 RS	328	size_t len = strlen(filename);
5bb1cda5 RS	329	size_t extlen = strlen(ext);
83a2b841 RS	330	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	331	}
	332
4050c0df	333	/* Sane ctype - no locale, and works with signed chars */
c2e9364a	334	#undef isascii
4050c0df JH	335	#undef isspace
	336	#undef isdigit
	337	#undef isalpha
	338	#undef isalnum
	339	#undef tolower
	340	#undef toupper
	341	extern unsigned char sane_ctype[256];
	342	#define GIT_SPACE 0x01
	343	#define GIT_DIGIT 0x02
	344	#define GIT_ALPHA 0x04
8cc32992	345	#define GIT_GLOB_SPECIAL 0x08
f9b7cce6	346	#define GIT_REGEX_SPECIAL 0x10
4050c0df	347	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
c2e9364a	348	#define isascii(x) (((x) & ~0x7f) == 0)
4050c0df JH	349	#define isspace(x) sane_istest(x,GIT_SPACE)
	350	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	351	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	352	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
8cc32992	353	#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
f9b7cce6	354	#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL \| GIT_REGEX_SPECIAL)
4050c0df JH	355	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	356	#define toupper(x) sane_case((unsigned char)(x), 0)
	357
	358	static inline int sane_case(int x, int high)
	359	{
	360	if (sane_istest(x, GIT_ALPHA))
	361	x = (x & ~0x20) \| high;
	362	return x;
	363	}
	364
6aead43d JM	365	static inline int strtoul_ui(char const s, int base, unsigned int result)
	366	{
	367	unsigned long ul;
	368	char *p;
	369
	370	errno = 0;
	371	ul = strtoul(s, &p, base);
	372	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	373	return -1;
	374	*result = ul;
	375	return 0;
	376	}
	377
7791ecbc JH	378	static inline int strtol_i(char const s, int base, int result)
	379	{
	380	long ul;
	381	char *p;
	382
	383	errno = 0;
	384	ul = strtol(s, &p, base);
	385	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	386	return -1;
	387	*result = ul;
	388	return 0;
	389	}
	390
43fe901b BD	391	#ifdef INTERNAL_QSORT
	392	void git_qsort(void *base, size_t nmemb, size_t size,
	393	int(compar)(const void , const void *));
	394	#define qsort git_qsort
	395	#endif
	396
81a24b52 AR	397	#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
	398	# define FORCE_DIR_SET_GID S_ISGID
	399	#else
	400	# define FORCE_DIR_SET_GID 0
	401	#endif
	402
c06ff490 KB	403	#ifdef NO_NSEC
	404	#undef USE_NSEC
	405	#define ST_CTIME_NSEC(st) 0
	406	#define ST_MTIME_NSEC(st) 0
	407	#else
c567383b BG	408	#ifdef USE_ST_TIMESPEC
	409	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
	410	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
	411	#else
c06ff490 KB	412	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
	413	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
	414	#endif
c567383b	415	#endif
c06ff490	416
34779c53 JS	417	#ifdef UNRELIABLE_FSTAT
	418	#define fstat_is_reliable() 0
	419	#else
	420	#define fstat_is_reliable() 1
	421	#endif
	422
fc71db39 AR	423	/*
	424	* Preserves errno, prints a message, but gives no warning for ENOENT.
	425	* Always returns the return value of unlink(2).
	426	*/
	427	int unlink_or_warn(const char *path);
	428
4050c0df	429	#endif