[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]))

#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(__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() */
#ifndef __sun__
#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
#endif
#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 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
4cb18a49 BC	42	#if defined(__sun__)
	43	/*
	44	* On Solaris, when _XOPEN_EXTENDED is set, its header file
	45	* forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
	46	* setting to say we are XPG5 or XPG6. Also on Solaris,
	47	* XPG6 programs must be compiled with a c99 compiler, while
	48	* non XPG6 programs must be compiled with a pre-c99 compiler.
	49	*/
	50	# if __STDC_VERSION__ - 0 >= 199901L
	51	# define _XOPEN_SOURCE 600
	52	# else
	53	# define _XOPEN_SOURCE 500
	54	# endif
9398b859	55	#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX) && !defined(sgi)
85023577	56	#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
30d8080c	57	#ifndef __sun__
85023577	58	#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a6	59	#endif
30d8080c	60	#endif
fb952206 JR	61	#define _ALL_SOURCE 1
	62	#define _GNU_SOURCE 1
	63	#define _BSD_SOURCE 1
9a695fbf	64	#define _NETBSD_SOURCE 1
9398b859	65	#define _SGI_SOURCE 1
85023577	66
4050c0df JH	67	#include <unistd.h>
	68	#include <stdio.h>
	69	#include <sys/stat.h>
	70	#include <fcntl.h>
	71	#include <stddef.h>
	72	#include <stdlib.h>
	73	#include <stdarg.h>
	74	#include <string.h>
	75	#include <errno.h>
	76	#include <limits.h>
	77	#include <sys/param.h>
4050c0df JH	78	#include <sys/types.h>
4050c0df JH	79	#include <dirent.h>
85023577 JH	80	#include <sys/time.h>
	81	#include <time.h>
	82	#include <signal.h>
85023577	83	#include <fnmatch.h>
f4626df5 JS	84	#include <assert.h>
	85	#include <regex.h>
	86	#include <utime.h>
	87	#ifndef __MINGW32__
	88	#include <sys/wait.h>
85023577 JH	89	#include <sys/poll.h>
85023577 JH	90	#include <sys/socket.h>
80bbe72b	91	#include <sys/ioctl.h>
2600973f	92	#ifndef NO_SYS_SELECT_H
80bbe72b	93	#include <sys/select.h>
2600973f	94	#endif
85023577 JH	95	#include <netinet/in.h>
	96	#include <netinet/tcp.h>
	97	#include <arpa/inet.h>
	98	#include <netdb.h>
	99	#include <pwd.h>
007e2ba6	100	#include <inttypes.h>
41b20017 RJ	101	#if defined(__CYGWIN__)
	102	#undef _XOPEN_SOURCE
	103	#include <grp.h>
	104	#define _XOPEN_SOURCE 600
adbc0b6b	105	#include "compat/cygwin.h"
41b20017	106	#else
fb952206	107	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577	108	#include <grp.h>
fb952206	109	#define _ALL_SOURCE 1
41b20017	110	#endif
f4626df5 JS	111	#else /* __MINGW32__ */
	112	/* pull in Windows compatibility stuff */
	113	#include "compat/mingw.h"
	114	#endif /* __MINGW32__ */
85023577	115
e1c06886 DA	116	#ifndef NO_LIBGEN_H
	117	#include <libgen.h>
	118	#else
	119	#define basename gitbasename
	120	extern char gitbasename(char );
	121	#endif
	122
85023577 JH	123	#ifndef NO_ICONV
	124	#include <iconv.h>
	125	#endif
4050c0df	126
684ec6c6 RS	127	#ifndef NO_OPENSSL
	128	#include <openssl/ssl.h>
	129	#include <openssl/err.h>
	130	#endif
	131
d0c2449f JH	132	/* On most systems <limits.h> would have given us this, but
	133	* not on some systems (e.g. GNU/Hurd).
	134	*/
	135	#ifndef PATH_MAX
	136	#define PATH_MAX 4096
	137	#endif
	138
c4001d92 SP	139	#ifndef PRIuMAX
	140	#define PRIuMAX "llu"
	141	#endif
	142
607bb3ff JS	143	#ifndef PRIu32
	144	#define PRIu32 "u"
	145	#endif
	146
	147	#ifndef PRIx32
	148	#define PRIx32 "x"
	149	#endif
	150
80ba074f JS	151	#ifndef PATH_SEP
	152	#define PATH_SEP ':'
	153	#endif
	154
23326d14 JS	155	#ifndef STRIP_EXTENSION
	156	#define STRIP_EXTENSION ""
	157	#endif
	158
25fe217b JS	159	#ifndef has_dos_drive_prefix
	160	#define has_dos_drive_prefix(path) 0
	161	#endif
	162
	163	#ifndef is_dir_sep
	164	#define is_dir_sep(c) ((c) == '/')
	165	#endif
	166
4050c0df JH	167	#ifdef __GNUC__
	168	#define NORETURN __attribute__((__noreturn__))
	169	#else
	170	#define NORETURN
	171	#ifndef __attribute__
	172	#define __attribute__(x)
	173	#endif
	174	#endif
	175
	176	/* General helper functions */
	177	extern void usage(const char *err) NORETURN;
	178	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
b875036e	179	extern void die_errno(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
4050c0df	180	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9	181	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df	182
39a3f5ea	183	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
39a3f5ea	184
698a68be	185	extern int prefixcmp(const char str, const char prefix);
bb5799d6	186	extern time_t tm_to_time_t(const struct tm *tm);
698a68be	187
fbca5837 MV	188	static inline const char skip_prefix(const char str, const char *prefix)
	189	{
	190	size_t len = strlen(prefix);
	191	return strncmp(str, prefix, len) ? NULL : str + len;
	192	}
	193
b130a72b	194	#if defined(NO_MMAP) \|\| defined(USE_WIN32_MMAP)
4050c0df JH	195
	196	#ifndef PROT_READ
	197	#define PROT_READ 1
	198	#define PROT_WRITE 2
	199	#define MAP_PRIVATE 1
	200	#define MAP_FAILED ((void*)-1)
	201	#endif
	202
d6779124 SP	203	#define mmap git_mmap
	204	#define munmap git_munmap
	205	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	206	extern int git_munmap(void *start, size_t length);
4050c0df	207
b130a72b JL	208	#else /* NO_MMAP \|\| USE_WIN32_MMAP */
	209
	210	#include <sys/mman.h>
	211
	212	#endif /* NO_MMAP \|\| USE_WIN32_MMAP */
	213
	214	#ifdef NO_MMAP
	215
5faaf246	216	/* This value must be multiple of (pagesize * 2) */
8c82534d SP	217	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
8c82534d SP	218
4050c0df JH	219	#else /* NO_MMAP */
4050c0df JH	220
5faaf246	221	/* This value must be multiple of (pagesize * 2) */
22bac0ea SP	222	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	223	(sizeof(void*) >= 8 \
	224	? 1 * 1024 * 1024 * 1024 \
	225	: 32 * 1024 * 1024)
4050c0df JH	226
	227	#endif /* NO_MMAP */
	228
fdb2a2a6 JH	229	#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
	230	#define on_disk_bytes(st) ((st).st_size)
	231	#else
	232	#define on_disk_bytes(st) ((st).st_blocks * 512)
	233	#endif
	234
22bac0ea	235	#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a	236	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d	237
6900679c SH	238	#ifdef NO_PREAD
	239	#define pread git_pread
	240	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	241	#endif
14086b0a SP	242	/*
	243	* Forward decl that will remind us if its twin in cache.h changes.
	244	* This function is used in compat/pread.c. But we can't include
	245	* cache.h there.
	246	*/
	247	extern ssize_t read_in_full(int fd, void *buf, size_t count);
6900679c	248
4050c0df JH	249	#ifdef NO_SETENV
	250	#define setenv gitsetenv
	251	extern int gitsetenv(const char , const char , int);
	252	#endif
	253
ca5bb5d5 SP	254	#ifdef NO_MKDTEMP
	255	#define mkdtemp gitmkdtemp
	256	extern char gitmkdtemp(char );
	257	#endif
	258
0620b39b DA	259	#ifdef NO_MKSTEMPS
	260	#define mkstemps gitmkstemps
	261	extern int gitmkstemps(char *, int);
	262	#endif
	263
731043fd JR	264	#ifdef NO_UNSETENV
	265	#define unsetenv gitunsetenv
	266	extern void gitunsetenv(const char *);
	267	#endif
	268
4050c0df JH	269	#ifdef NO_STRCASESTR
	270	#define strcasestr gitstrcasestr
	271	extern char gitstrcasestr(const char haystack, const char *needle);
	272	#endif
	273
817151e6 PE	274	#ifdef NO_STRLCPY
	275	#define strlcpy gitstrlcpy
	276	extern size_t gitstrlcpy(char , const char , size_t);
	277	#endif
	278
bc6b4f52 JR	279	#ifdef NO_STRTOUMAX
	280	#define strtoumax gitstrtoumax
	281	extern uintmax_t gitstrtoumax(const char , char *, int);
	282	#endif
	283
fa0c87c3 AR	284	#ifdef NO_HSTRERROR
	285	#define hstrerror githstrerror
	286	extern const char *githstrerror(int herror);
	287	#endif
	288
b21b9f1d RS	289	#ifdef NO_MEMMEM
	290	#define memmem gitmemmem
	291	void gitmemmem(const void haystack, size_t haystacklen,
	292	const void *needle, size_t needlelen);
	293	#endif
	294
cba22528	295	#ifdef FREAD_READS_DIRECTORIES
c5445fe0 JS	296	#ifdef fopen
	297	#undef fopen
	298	#endif
cba22528 BC	299	#define fopen(a,b) git_fopen(a,b)
	300	extern FILE git_fopen(const char, const char*);
	301	#endif
	302
c4582f93 MR	303	#ifdef SNPRINTF_RETURNS_BOGUS
	304	#define snprintf git_snprintf
	305	extern int git_snprintf(char *str, size_t maxsize,
	306	const char *format, ...);
	307	#define vsnprintf git_vsnprintf
	308	extern int git_vsnprintf(char *str, size_t maxsize,
	309	const char *format, va_list ap);
	310	#endif
	311
726c8ef5 JS	312	#ifdef __GLIBC_PREREQ
	313	#if __GLIBC_PREREQ(2, 1)
	314	#define HAVE_STRCHRNUL
	315	#endif
	316	#endif
	317
	318	#ifndef HAVE_STRCHRNUL
659c69cf	319	#define strchrnul gitstrchrnul
9e79f00f AE	320	static inline char gitstrchrnul(const char s, int c)
	321	{
	322	while (s && s != c)
	323	s++;
	324	return (char *)s;
	325	}
659c69cf RS	326	#endif
659c69cf RS	327
d1efefa4	328	extern void release_pack_memory(size_t, int);
97bfeb34	329
112db553 LT	330	extern char xstrdup(const char str);
	331	extern void *xmalloc(size_t size);
	332	extern void xmemdupz(const void data, size_t len);
	333	extern char xstrndup(const char str, size_t len);
	334	extern void xrealloc(void ptr, size_t size);
	335	extern void *xcalloc(size_t nmemb, size_t size);
	336	extern void xmmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	337	extern ssize_t xread(int fd, void *buf, size_t len);
	338	extern ssize_t xwrite(int fd, const void *buf, size_t len);
	339	extern int xdup(int fd);
	340	extern FILE xfdopen(int fd, const char mode);
	341	extern int xmkstemp(char *template);
6e180cdc JH	342	extern int odb_mkstemp(char template, size_t limit, const char pattern);
6e180cdc JH	343	extern int odb_pack_keep(char name, size_t namesz, unsigned char sha1);
f21a47b2	344
dc49cd76 SP	345	static inline size_t xsize_t(off_t len)
	346	{
	347	return (size_t)len;
	348	}
	349
5bb1cda5	350	static inline int has_extension(const char filename, const char ext)
83a2b841	351	{
5bb1cda5 RS	352	size_t len = strlen(filename);
5bb1cda5 RS	353	size_t extlen = strlen(ext);
83a2b841 RS	354	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	355	}
	356
4050c0df	357	/* Sane ctype - no locale, and works with signed chars */
c2e9364a	358	#undef isascii
4050c0df JH	359	#undef isspace
	360	#undef isdigit
	361	#undef isalpha
	362	#undef isalnum
	363	#undef tolower
	364	#undef toupper
	365	extern unsigned char sane_ctype[256];
	366	#define GIT_SPACE 0x01
	367	#define GIT_DIGIT 0x02
	368	#define GIT_ALPHA 0x04
8cc32992	369	#define GIT_GLOB_SPECIAL 0x08
f9b7cce6	370	#define GIT_REGEX_SPECIAL 0x10
4050c0df	371	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
c2e9364a	372	#define isascii(x) (((x) & ~0x7f) == 0)
4050c0df JH	373	#define isspace(x) sane_istest(x,GIT_SPACE)
	374	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	375	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	376	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
8cc32992	377	#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
f9b7cce6	378	#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL \| GIT_REGEX_SPECIAL)
4050c0df JH	379	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	380	#define toupper(x) sane_case((unsigned char)(x), 0)
	381
	382	static inline int sane_case(int x, int high)
	383	{
	384	if (sane_istest(x, GIT_ALPHA))
	385	x = (x & ~0x20) \| high;
	386	return x;
	387	}
	388
6aead43d JM	389	static inline int strtoul_ui(char const s, int base, unsigned int result)
	390	{
	391	unsigned long ul;
	392	char *p;
	393
	394	errno = 0;
	395	ul = strtoul(s, &p, base);
	396	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	397	return -1;
	398	*result = ul;
	399	return 0;
	400	}
	401
7791ecbc JH	402	static inline int strtol_i(char const s, int base, int result)
	403	{
	404	long ul;
	405	char *p;
	406
	407	errno = 0;
	408	ul = strtol(s, &p, base);
	409	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	410	return -1;
	411	*result = ul;
	412	return 0;
	413	}
	414
43fe901b BD	415	#ifdef INTERNAL_QSORT
	416	void git_qsort(void *base, size_t nmemb, size_t size,
	417	int(compar)(const void , const void *));
	418	#define qsort git_qsort
	419	#endif
	420
81a24b52 AR	421	#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
	422	# define FORCE_DIR_SET_GID S_ISGID
	423	#else
	424	# define FORCE_DIR_SET_GID 0
	425	#endif
	426
c06ff490 KB	427	#ifdef NO_NSEC
	428	#undef USE_NSEC
	429	#define ST_CTIME_NSEC(st) 0
	430	#define ST_MTIME_NSEC(st) 0
	431	#else
c567383b BG	432	#ifdef USE_ST_TIMESPEC
	433	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
	434	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
	435	#else
c06ff490 KB	436	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
	437	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
	438	#endif
c567383b	439	#endif
c06ff490	440
34779c53 JS	441	#ifdef UNRELIABLE_FSTAT
	442	#define fstat_is_reliable() 0
	443	#else
	444	#define fstat_is_reliable() 1
	445	#endif
	446
fc71db39 AR	447	/*
	448	* Preserves errno, prints a message, but gives no warning for ENOENT.
	449	* Always returns the return value of unlink(2).
	450	*/
	451	int unlink_or_warn(const char *path);
	452
4050c0df	453	#endif