[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

#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;
}

#ifdef NO_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);

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

#else /* NO_MMAP */

#include <sys/mman.h>

/* 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_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);

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