[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
#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_usage_routine(void (*routine)(const char *err) NORETURN);
extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
extern void set_error_routine(void (*routine)(const char *err, va_list params));
extern void set_warn_routine(void (*routine)(const char *warn, va_list params));

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_SPECIAL 0x08
#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 isspecial(x) sane_istest(x,GIT_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

#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
	88	#else
fb952206	89	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577	90	#include <grp.h>
fb952206	91	#define _ALL_SOURCE 1
41b20017	92	#endif
f4626df5 JS	93	#else /* __MINGW32__ */
	94	/* pull in Windows compatibility stuff */
	95	#include "compat/mingw.h"
	96	#endif /* __MINGW32__ */
85023577 JH	97
	98	#ifndef NO_ICONV
	99	#include <iconv.h>
	100	#endif
4050c0df	101
684ec6c6 RS	102	#ifndef NO_OPENSSL
	103	#include <openssl/ssl.h>
	104	#include <openssl/err.h>
	105	#endif
	106
d0c2449f JH	107	/* On most systems <limits.h> would have given us this, but
	108	* not on some systems (e.g. GNU/Hurd).
	109	*/
	110	#ifndef PATH_MAX
	111	#define PATH_MAX 4096
	112	#endif
	113
c4001d92 SP	114	#ifndef PRIuMAX
	115	#define PRIuMAX "llu"
	116	#endif
	117
607bb3ff JS	118	#ifndef PRIu32
	119	#define PRIu32 "u"
	120	#endif
	121
	122	#ifndef PRIx32
	123	#define PRIx32 "x"
	124	#endif
	125
80ba074f JS	126	#ifndef PATH_SEP
	127	#define PATH_SEP ':'
	128	#endif
	129
23326d14 JS	130	#ifndef STRIP_EXTENSION
	131	#define STRIP_EXTENSION ""
	132	#endif
	133
25fe217b JS	134	#ifndef has_dos_drive_prefix
	135	#define has_dos_drive_prefix(path) 0
	136	#endif
	137
	138	#ifndef is_dir_sep
	139	#define is_dir_sep(c) ((c) == '/')
	140	#endif
	141
4050c0df JH	142	#ifdef __GNUC__
	143	#define NORETURN __attribute__((__noreturn__))
	144	#else
	145	#define NORETURN
	146	#ifndef __attribute__
	147	#define __attribute__(x)
	148	#endif
	149	#endif
	150
	151	/* General helper functions */
	152	extern void usage(const char *err) NORETURN;
	153	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	154	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9	155	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df	156
39a3f5ea PB	157	extern void set_usage_routine(void (routine)(const char err) NORETURN);
	158	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
	159	extern void set_error_routine(void (routine)(const char err, va_list params));
fa39b6b5	160	extern void set_warn_routine(void (routine)(const char warn, va_list params));
39a3f5ea	161
698a68be	162	extern int prefixcmp(const char str, const char prefix);
bb5799d6	163	extern time_t tm_to_time_t(const struct tm *tm);
698a68be	164
fbca5837 MV	165	static inline const char skip_prefix(const char str, const char *prefix)
	166	{
	167	size_t len = strlen(prefix);
	168	return strncmp(str, prefix, len) ? NULL : str + len;
	169	}
	170
4050c0df JH	171	#ifdef NO_MMAP
	172
	173	#ifndef PROT_READ
	174	#define PROT_READ 1
	175	#define PROT_WRITE 2
	176	#define MAP_PRIVATE 1
	177	#define MAP_FAILED ((void*)-1)
	178	#endif
	179
d6779124 SP	180	#define mmap git_mmap
	181	#define munmap git_munmap
	182	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	183	extern int git_munmap(void *start, size_t length);
4050c0df	184
5faaf246	185	/* This value must be multiple of (pagesize * 2) */
8c82534d SP	186	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
8c82534d SP	187
4050c0df JH	188	#else /* NO_MMAP */
	189
	190	#include <sys/mman.h>
5faaf246 JH	191
5faaf246 JH	192	/* This value must be multiple of (pagesize * 2) */
22bac0ea SP	193	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	194	(sizeof(void*) >= 8 \
	195	? 1 * 1024 * 1024 * 1024 \
	196	: 32 * 1024 * 1024)
4050c0df JH	197
	198	#endif /* NO_MMAP */
	199
fdb2a2a6 JH	200	#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
	201	#define on_disk_bytes(st) ((st).st_size)
	202	#else
	203	#define on_disk_bytes(st) ((st).st_blocks * 512)
	204	#endif
	205
22bac0ea	206	#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a	207	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d	208
6900679c SH	209	#ifdef NO_PREAD
	210	#define pread git_pread
	211	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	212	#endif
14086b0a SP	213	/*
	214	* Forward decl that will remind us if its twin in cache.h changes.
	215	* This function is used in compat/pread.c. But we can't include
	216	* cache.h there.
	217	*/
	218	extern ssize_t read_in_full(int fd, void *buf, size_t count);
6900679c	219
4050c0df JH	220	#ifdef NO_SETENV
	221	#define setenv gitsetenv
	222	extern int gitsetenv(const char , const char , int);
	223	#endif
	224
ca5bb5d5 SP	225	#ifdef NO_MKDTEMP
	226	#define mkdtemp gitmkdtemp
	227	extern char gitmkdtemp(char );
	228	#endif
	229
731043fd JR	230	#ifdef NO_UNSETENV
	231	#define unsetenv gitunsetenv
	232	extern void gitunsetenv(const char *);
	233	#endif
	234
4050c0df JH	235	#ifdef NO_STRCASESTR
	236	#define strcasestr gitstrcasestr
	237	extern char gitstrcasestr(const char haystack, const char *needle);
	238	#endif
	239
817151e6 PE	240	#ifdef NO_STRLCPY
	241	#define strlcpy gitstrlcpy
	242	extern size_t gitstrlcpy(char , const char , size_t);
	243	#endif
	244
bc6b4f52 JR	245	#ifdef NO_STRTOUMAX
	246	#define strtoumax gitstrtoumax
	247	extern uintmax_t gitstrtoumax(const char , char *, int);
	248	#endif
	249
fa0c87c3 AR	250	#ifdef NO_HSTRERROR
	251	#define hstrerror githstrerror
	252	extern const char *githstrerror(int herror);
	253	#endif
	254
b21b9f1d RS	255	#ifdef NO_MEMMEM
	256	#define memmem gitmemmem
	257	void gitmemmem(const void haystack, size_t haystacklen,
	258	const void *needle, size_t needlelen);
	259	#endif
	260
cba22528	261	#ifdef FREAD_READS_DIRECTORIES
c5445fe0 JS	262	#ifdef fopen
	263	#undef fopen
	264	#endif
cba22528 BC	265	#define fopen(a,b) git_fopen(a,b)
	266	extern FILE git_fopen(const char, const char*);
	267	#endif
	268
c4582f93 MR	269	#ifdef SNPRINTF_RETURNS_BOGUS
	270	#define snprintf git_snprintf
	271	extern int git_snprintf(char *str, size_t maxsize,
	272	const char *format, ...);
	273	#define vsnprintf git_vsnprintf
	274	extern int git_vsnprintf(char *str, size_t maxsize,
	275	const char *format, va_list ap);
	276	#endif
	277
726c8ef5 JS	278	#ifdef __GLIBC_PREREQ
	279	#if __GLIBC_PREREQ(2, 1)
	280	#define HAVE_STRCHRNUL
	281	#endif
	282	#endif
	283
	284	#ifndef HAVE_STRCHRNUL
659c69cf	285	#define strchrnul gitstrchrnul
9e79f00f AE	286	static inline char gitstrchrnul(const char s, int c)
	287	{
	288	while (s && s != c)
	289	s++;
	290	return (char *)s;
	291	}
659c69cf RS	292	#endif
659c69cf RS	293
d1efefa4	294	extern void release_pack_memory(size_t, int);
97bfeb34	295
112db553 LT	296	extern char xstrdup(const char str);
	297	extern void *xmalloc(size_t size);
	298	extern void xmemdupz(const void data, size_t len);
	299	extern char xstrndup(const char str, size_t len);
	300	extern void xrealloc(void ptr, size_t size);
	301	extern void *xcalloc(size_t nmemb, size_t size);
	302	extern void xmmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	303	extern ssize_t xread(int fd, void *buf, size_t len);
	304	extern ssize_t xwrite(int fd, const void *buf, size_t len);
	305	extern int xdup(int fd);
	306	extern FILE xfdopen(int fd, const char mode);
	307	extern int xmkstemp(char *template);
f21a47b2	308
dc49cd76 SP	309	static inline size_t xsize_t(off_t len)
	310	{
	311	return (size_t)len;
	312	}
	313
5bb1cda5	314	static inline int has_extension(const char filename, const char ext)
83a2b841	315	{
5bb1cda5 RS	316	size_t len = strlen(filename);
5bb1cda5 RS	317	size_t extlen = strlen(ext);
83a2b841 RS	318	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	319	}
	320
4050c0df JH	321	/* Sane ctype - no locale, and works with signed chars */
	322	#undef isspace
	323	#undef isdigit
	324	#undef isalpha
	325	#undef isalnum
	326	#undef tolower
	327	#undef toupper
	328	extern unsigned char sane_ctype[256];
	329	#define GIT_SPACE 0x01
	330	#define GIT_DIGIT 0x02
	331	#define GIT_ALPHA 0x04
63e8aea7	332	#define GIT_SPECIAL 0x08
4050c0df JH	333	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	334	#define isspace(x) sane_istest(x,GIT_SPACE)
	335	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	336	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	337	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
63e8aea7	338	#define isspecial(x) sane_istest(x,GIT_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
4050c0df	387	#endif