[git/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_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 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	99
e1c06886 DA	100	#ifndef NO_LIBGEN_H
	101	#include <libgen.h>
	102	#else
	103	#define basename gitbasename
	104	extern char gitbasename(char );
	105	#endif
	106
85023577 JH	107	#ifndef NO_ICONV
	108	#include <iconv.h>
	109	#endif
4050c0df	110
684ec6c6 RS	111	#ifndef NO_OPENSSL
	112	#include <openssl/ssl.h>
	113	#include <openssl/err.h>
	114	#endif
	115
d0c2449f JH	116	/* On most systems <limits.h> would have given us this, but
	117	* not on some systems (e.g. GNU/Hurd).
	118	*/
	119	#ifndef PATH_MAX
	120	#define PATH_MAX 4096
	121	#endif
	122
c4001d92 SP	123	#ifndef PRIuMAX
	124	#define PRIuMAX "llu"
	125	#endif
	126
607bb3ff JS	127	#ifndef PRIu32
	128	#define PRIu32 "u"
	129	#endif
	130
	131	#ifndef PRIx32
	132	#define PRIx32 "x"
	133	#endif
	134
80ba074f JS	135	#ifndef PATH_SEP
	136	#define PATH_SEP ':'
	137	#endif
	138
23326d14 JS	139	#ifndef STRIP_EXTENSION
	140	#define STRIP_EXTENSION ""
	141	#endif
	142
25fe217b JS	143	#ifndef has_dos_drive_prefix
	144	#define has_dos_drive_prefix(path) 0
	145	#endif
	146
	147	#ifndef is_dir_sep
	148	#define is_dir_sep(c) ((c) == '/')
	149	#endif
	150
4050c0df JH	151	#ifdef __GNUC__
	152	#define NORETURN __attribute__((__noreturn__))
	153	#else
	154	#define NORETURN
	155	#ifndef __attribute__
	156	#define __attribute__(x)
	157	#endif
	158	#endif
	159
	160	/* General helper functions */
	161	extern void usage(const char *err) NORETURN;
	162	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	163	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9	164	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df	165
39a3f5ea	166	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
39a3f5ea	167
698a68be	168	extern int prefixcmp(const char str, const char prefix);
bb5799d6	169	extern time_t tm_to_time_t(const struct tm *tm);
698a68be	170
fbca5837 MV	171	static inline const char skip_prefix(const char str, const char *prefix)
	172	{
	173	size_t len = strlen(prefix);
	174	return strncmp(str, prefix, len) ? NULL : str + len;
	175	}
	176
b130a72b	177	#if defined(NO_MMAP) \|\| defined(USE_WIN32_MMAP)
4050c0df JH	178
	179	#ifndef PROT_READ
	180	#define PROT_READ 1
	181	#define PROT_WRITE 2
	182	#define MAP_PRIVATE 1
	183	#define MAP_FAILED ((void*)-1)
	184	#endif
	185
d6779124 SP	186	#define mmap git_mmap
	187	#define munmap git_munmap
	188	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	189	extern int git_munmap(void *start, size_t length);
4050c0df	190
b130a72b JL	191	#else /* NO_MMAP \|\| USE_WIN32_MMAP */
	192
	193	#include <sys/mman.h>
	194
	195	#endif /* NO_MMAP \|\| USE_WIN32_MMAP */
	196
	197	#ifdef NO_MMAP
	198
5faaf246	199	/* This value must be multiple of (pagesize * 2) */
8c82534d SP	200	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
8c82534d SP	201
4050c0df JH	202	#else /* NO_MMAP */
4050c0df JH	203
5faaf246	204	/* This value must be multiple of (pagesize * 2) */
22bac0ea SP	205	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	206	(sizeof(void*) >= 8 \
	207	? 1 * 1024 * 1024 * 1024 \
	208	: 32 * 1024 * 1024)
4050c0df JH	209
	210	#endif /* NO_MMAP */
	211
fdb2a2a6 JH	212	#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
	213	#define on_disk_bytes(st) ((st).st_size)
	214	#else
	215	#define on_disk_bytes(st) ((st).st_blocks * 512)
	216	#endif
	217
22bac0ea	218	#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a	219	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d	220
6900679c SH	221	#ifdef NO_PREAD
	222	#define pread git_pread
	223	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	224	#endif
14086b0a SP	225	/*
	226	* Forward decl that will remind us if its twin in cache.h changes.
	227	* This function is used in compat/pread.c. But we can't include
	228	* cache.h there.
	229	*/
	230	extern ssize_t read_in_full(int fd, void *buf, size_t count);
6900679c	231
4050c0df JH	232	#ifdef NO_SETENV
	233	#define setenv gitsetenv
	234	extern int gitsetenv(const char , const char , int);
	235	#endif
	236
ca5bb5d5 SP	237	#ifdef NO_MKDTEMP
	238	#define mkdtemp gitmkdtemp
	239	extern char gitmkdtemp(char );
	240	#endif
	241
0620b39b DA	242	#ifdef NO_MKSTEMPS
	243	#define mkstemps gitmkstemps
	244	extern int gitmkstemps(char *, int);
	245	#endif
	246
731043fd JR	247	#ifdef NO_UNSETENV
	248	#define unsetenv gitunsetenv
	249	extern void gitunsetenv(const char *);
	250	#endif
	251
4050c0df JH	252	#ifdef NO_STRCASESTR
	253	#define strcasestr gitstrcasestr
	254	extern char gitstrcasestr(const char haystack, const char *needle);
	255	#endif
	256
817151e6 PE	257	#ifdef NO_STRLCPY
	258	#define strlcpy gitstrlcpy
	259	extern size_t gitstrlcpy(char , const char , size_t);
	260	#endif
	261
bc6b4f52 JR	262	#ifdef NO_STRTOUMAX
	263	#define strtoumax gitstrtoumax
	264	extern uintmax_t gitstrtoumax(const char , char *, int);
	265	#endif
	266
fa0c87c3 AR	267	#ifdef NO_HSTRERROR
	268	#define hstrerror githstrerror
	269	extern const char *githstrerror(int herror);
	270	#endif
	271
b21b9f1d RS	272	#ifdef NO_MEMMEM
	273	#define memmem gitmemmem
	274	void gitmemmem(const void haystack, size_t haystacklen,
	275	const void *needle, size_t needlelen);
	276	#endif
	277
cba22528	278	#ifdef FREAD_READS_DIRECTORIES
c5445fe0 JS	279	#ifdef fopen
	280	#undef fopen
	281	#endif
cba22528 BC	282	#define fopen(a,b) git_fopen(a,b)
	283	extern FILE git_fopen(const char, const char*);
	284	#endif
	285
c4582f93 MR	286	#ifdef SNPRINTF_RETURNS_BOGUS
	287	#define snprintf git_snprintf
	288	extern int git_snprintf(char *str, size_t maxsize,
	289	const char *format, ...);
	290	#define vsnprintf git_vsnprintf
	291	extern int git_vsnprintf(char *str, size_t maxsize,
	292	const char *format, va_list ap);
	293	#endif
	294
726c8ef5 JS	295	#ifdef __GLIBC_PREREQ
	296	#if __GLIBC_PREREQ(2, 1)
	297	#define HAVE_STRCHRNUL
	298	#endif
	299	#endif
	300
	301	#ifndef HAVE_STRCHRNUL
659c69cf	302	#define strchrnul gitstrchrnul
9e79f00f AE	303	static inline char gitstrchrnul(const char s, int c)
	304	{
	305	while (s && s != c)
	306	s++;
	307	return (char *)s;
	308	}
659c69cf RS	309	#endif
659c69cf RS	310
d1efefa4	311	extern void release_pack_memory(size_t, int);
97bfeb34	312
112db553 LT	313	extern char xstrdup(const char str);
	314	extern void *xmalloc(size_t size);
	315	extern void xmemdupz(const void data, size_t len);
	316	extern char xstrndup(const char str, size_t len);
	317	extern void xrealloc(void ptr, size_t size);
	318	extern void *xcalloc(size_t nmemb, size_t size);
	319	extern void xmmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	320	extern ssize_t xread(int fd, void *buf, size_t len);
	321	extern ssize_t xwrite(int fd, const void *buf, size_t len);
	322	extern int xdup(int fd);
	323	extern FILE xfdopen(int fd, const char mode);
	324	extern int xmkstemp(char *template);
6e180cdc JH	325	extern int odb_mkstemp(char template, size_t limit, const char pattern);
6e180cdc JH	326	extern int odb_pack_keep(char name, size_t namesz, unsigned char sha1);
f21a47b2	327
dc49cd76 SP	328	static inline size_t xsize_t(off_t len)
	329	{
	330	return (size_t)len;
	331	}
	332
5bb1cda5	333	static inline int has_extension(const char filename, const char ext)
83a2b841	334	{
5bb1cda5 RS	335	size_t len = strlen(filename);
5bb1cda5 RS	336	size_t extlen = strlen(ext);
83a2b841 RS	337	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	338	}
	339
4050c0df	340	/* Sane ctype - no locale, and works with signed chars */
c2e9364a	341	#undef isascii
4050c0df JH	342	#undef isspace
	343	#undef isdigit
	344	#undef isalpha
	345	#undef isalnum
	346	#undef tolower
	347	#undef toupper
	348	extern unsigned char sane_ctype[256];
	349	#define GIT_SPACE 0x01
	350	#define GIT_DIGIT 0x02
	351	#define GIT_ALPHA 0x04
8cc32992	352	#define GIT_GLOB_SPECIAL 0x08
f9b7cce6	353	#define GIT_REGEX_SPECIAL 0x10
4050c0df	354	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
c2e9364a	355	#define isascii(x) (((x) & ~0x7f) == 0)
4050c0df JH	356	#define isspace(x) sane_istest(x,GIT_SPACE)
	357	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	358	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	359	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
8cc32992	360	#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
f9b7cce6	361	#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL \| GIT_REGEX_SPECIAL)
4050c0df JH	362	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	363	#define toupper(x) sane_case((unsigned char)(x), 0)
	364
	365	static inline int sane_case(int x, int high)
	366	{
	367	if (sane_istest(x, GIT_ALPHA))
	368	x = (x & ~0x20) \| high;
	369	return x;
	370	}
	371
6aead43d JM	372	static inline int strtoul_ui(char const s, int base, unsigned int result)
	373	{
	374	unsigned long ul;
	375	char *p;
	376
	377	errno = 0;
	378	ul = strtoul(s, &p, base);
	379	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	380	return -1;
	381	*result = ul;
	382	return 0;
	383	}
	384
7791ecbc JH	385	static inline int strtol_i(char const s, int base, int result)
	386	{
	387	long ul;
	388	char *p;
	389
	390	errno = 0;
	391	ul = strtol(s, &p, base);
	392	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	393	return -1;
	394	*result = ul;
	395	return 0;
	396	}
	397
43fe901b BD	398	#ifdef INTERNAL_QSORT
	399	void git_qsort(void *base, size_t nmemb, size_t size,
	400	int(compar)(const void , const void *));
	401	#define qsort git_qsort
	402	#endif
	403
81a24b52 AR	404	#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
	405	# define FORCE_DIR_SET_GID S_ISGID
	406	#else
	407	# define FORCE_DIR_SET_GID 0
	408	#endif
	409
c06ff490 KB	410	#ifdef NO_NSEC
	411	#undef USE_NSEC
	412	#define ST_CTIME_NSEC(st) 0
	413	#define ST_MTIME_NSEC(st) 0
	414	#else
c567383b BG	415	#ifdef USE_ST_TIMESPEC
	416	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
	417	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
	418	#else
c06ff490 KB	419	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
	420	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
	421	#endif
c567383b	422	#endif
c06ff490	423
34779c53 JS	424	#ifdef UNRELIABLE_FSTAT
	425	#define fstat_is_reliable() 0
	426	#else
	427	#define fstat_is_reliable() 1
	428	#endif
	429
fc71db39 AR	430	/*
	431	* Preserves errno, prints a message, but gives no warning for ENOENT.
	432	* Always returns the return value of unlink(2).
	433	*/
	434	int unlink_or_warn(const char *path);
	435
4050c0df	436	#endif