[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]))
#define bitsizeof(x)  (CHAR_BIT * sizeof(x))

#define maximum_signed_value_of_type(a) \
    (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))

#define maximum_unsigned_value_of_type(a) \
    (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))

/*
 * Signed integer overflow is undefined in C, so here's a helper macro
 * to detect if the sum of two integers will overflow.
 *
 * Requires: a >= 0, typeof(a) equals typeof(b)
 */
#define signed_add_overflows(a, b) \
    ((b) > maximum_signed_value_of_type(a) - (a))

#define unsigned_add_overflows(a, b) \
    ((b) > maximum_unsigned_value_of_type(a) - (a))

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

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

#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))

/* 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) && !defined(__DragonFly__)
#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
#define _SGI_SOURCE 1

#ifdef WIN32 /* Both MinGW and MSVC */
#define WIN32_LEAN_AND_MEAN  /* stops windows.h including winsock.h */
#include <winsock2.h>
#include <windows.h>
#endif

#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>
#include <syslog.h>
#ifndef NO_SYS_POLL_H
#include <sys/poll.h>
#else
#include <poll.h>
#endif
#ifndef __MINGW32__
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <termios.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>
#ifndef NO_INTTYPES_H
#include <inttypes.h>
#else
#include <stdint.h>
#endif
#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__ */
#ifdef _MSC_VER
#include "compat/msvc.h"
#endif

#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 PRIo32
#define PRIo32 "o"
#endif

#ifndef PATH_SEP
#define PATH_SEP ':'
#endif

#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifndef _PATH_DEFPATH
#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
#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__))
#define NORETURN_PTR __attribute__((__noreturn__))
#elif defined(_MSC_VER)
#define NORETURN __declspec(noreturn)
#define NORETURN_PTR
#else
#define NORETURN
#define NORETURN_PTR
#ifndef __attribute__
#define __attribute__(x)
#endif
#endif

#include "compat/bswap.h"

/* General helper functions */
extern void vreportf(const char *prefix, const char *err, va_list params);
extern NORETURN void usage(const char *err);
extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern NORETURN void die_errno(const char *err, ...) __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(NORETURN_PTR void (*routine)(const char *err, va_list params));

extern int prefixcmp(const char *str, const char *prefix);
extern int suffixcmp(const char *str, const char *suffix);

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
#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 */

#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif

#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_STRTOK_R
#define strtok_r gitstrtok_r
extern char *gitstrtok_r(char *s, const char *delim, char **save_ptr);
#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
#define HAVE_MEMPCPY
#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

#ifndef HAVE_MEMPCPY
#define mempcpy gitmempcpy
static inline void *gitmempcpy(void *dest, const void *src, size_t n)
{
	return (char *)memcpy(dest, src, n) + n;
}
#endif

#ifdef NO_INET_PTON
int inet_pton(int af, const char *src, void *dst);
#endif

#ifdef NO_INET_NTOP
const char *inet_ntop(int af, const void *src, char *dst, size_t size);
#endif

extern void release_pack_memory(size_t, int);

typedef void (*try_to_free_t)(size_t);
extern try_to_free_t set_try_to_free_routine(try_to_free_t);

extern char *xstrdup(const char *str);
extern void *xmalloc(size_t size);
extern void *xmallocz(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 xmkstemp_mode(char *template, int mode);
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)
{
	if (len > (size_t) len)
		die("Cannot handle files this big");
	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);
/*
 * Likewise for rmdir(2).
 */
int rmdir_or_warn(const char *path);
/*
 * Calls the correct function out of {unlink,rmdir}_or_warn based on
 * the supplied file mode.
 */
int remove_or_warn(unsigned int mode, const char *path);

#endif
Commit	Line	Data
	1	#ifndef GIT_COMPAT_UTIL_H
	2	#define GIT_COMPAT_UTIL_H
	3
	4	#define _FILE_OFFSET_BITS 64
	5
	6	#ifndef FLEX_ARRAY
	7	/*
	8	* See if our compiler is known to support flexible array members.
	9	*/
	10	#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) \|\| (__SUNPRO_C > 0x580))
	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
	25	#endif
	26	#endif
	27
	28	#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
	29	#define bitsizeof(x) (CHAR_BIT * sizeof(x))
	30
	31	#define maximum_signed_value_of_type(a) \
	32	(INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
	33
	34	#define maximum_unsigned_value_of_type(a) \
	35	(UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
	36
	37	/*
	38	* Signed integer overflow is undefined in C, so here's a helper macro
	39	* to detect if the sum of two integers will overflow.
	40	*
	41	* Requires: a >= 0, typeof(a) equals typeof(b)
	42	*/
	43	#define signed_add_overflows(a, b) \
	44	((b) > maximum_signed_value_of_type(a) - (a))
	45
	46	#define unsigned_add_overflows(a, b) \
	47	((b) > maximum_unsigned_value_of_type(a) - (a))
	48
	49	#ifdef __GNUC__
	50	#define TYPEOF(x) (__typeof__(x))
	51	#else
	52	#define TYPEOF(x)
	53	#endif
	54
	55	#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
	56	#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
	57
	58	#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
	59
	60	/* Approximation of the length of the decimal representation of this type. */
	61	#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
	62
	63	#if defined(__sun__)
	64	/*
	65	* On Solaris, when _XOPEN_EXTENDED is set, its header file
	66	* forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
	67	* setting to say we are XPG5 or XPG6. Also on Solaris,
	68	* XPG6 programs must be compiled with a c99 compiler, while
	69	* non XPG6 programs must be compiled with a pre-c99 compiler.
	70	*/
	71	# if __STDC_VERSION__ - 0 >= 199901L
	72	# define _XOPEN_SOURCE 600
	73	# else
	74	# define _XOPEN_SOURCE 500
	75	# endif
	76	#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
	77	!defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__)
	78	#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
	79	#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
	80	#endif
	81	#define _ALL_SOURCE 1
	82	#define _GNU_SOURCE 1
	83	#define _BSD_SOURCE 1
	84	#define _NETBSD_SOURCE 1
	85	#define _SGI_SOURCE 1
	86
	87	#ifdef WIN32 /* Both MinGW and MSVC */
	88	#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
	89	#include <winsock2.h>
	90	#include <windows.h>
	91	#endif
	92
	93	#include <unistd.h>
	94	#include <stdio.h>
	95	#include <sys/stat.h>
	96	#include <fcntl.h>
	97	#include <stddef.h>
	98	#include <stdlib.h>
	99	#include <stdarg.h>
	100	#include <string.h>
	101	#include <errno.h>
	102	#include <limits.h>
	103	#include <sys/param.h>
	104	#include <sys/types.h>
	105	#include <dirent.h>
	106	#include <sys/time.h>
	107	#include <time.h>
	108	#include <signal.h>
	109	#include <fnmatch.h>
	110	#include <assert.h>
	111	#include <regex.h>
	112	#include <utime.h>
	113	#include <syslog.h>
	114	#ifndef NO_SYS_POLL_H
	115	#include <sys/poll.h>
	116	#else
	117	#include <poll.h>
	118	#endif
	119	#ifndef __MINGW32__
	120	#include <sys/wait.h>
	121	#include <sys/socket.h>
	122	#include <sys/ioctl.h>
	123	#include <termios.h>
	124	#ifndef NO_SYS_SELECT_H
	125	#include <sys/select.h>
	126	#endif
	127	#include <netinet/in.h>
	128	#include <netinet/tcp.h>
	129	#include <arpa/inet.h>
	130	#include <netdb.h>
	131	#include <pwd.h>
	132	#ifndef NO_INTTYPES_H
	133	#include <inttypes.h>
	134	#else
	135	#include <stdint.h>
	136	#endif
	137	#if defined(__CYGWIN__)
	138	#undef _XOPEN_SOURCE
	139	#include <grp.h>
	140	#define _XOPEN_SOURCE 600
	141	#include "compat/cygwin.h"
	142	#else
	143	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
	144	#include <grp.h>
	145	#define _ALL_SOURCE 1
	146	#endif
	147	#else /* __MINGW32__ */
	148	/* pull in Windows compatibility stuff */
	149	#include "compat/mingw.h"
	150	#endif /* __MINGW32__ */
	151	#ifdef _MSC_VER
	152	#include "compat/msvc.h"
	153	#endif
	154
	155	#ifndef NO_LIBGEN_H
	156	#include <libgen.h>
	157	#else
	158	#define basename gitbasename
	159	extern char gitbasename(char );
	160	#endif
	161
	162	#ifndef NO_ICONV
	163	#include <iconv.h>
	164	#endif
	165
	166	#ifndef NO_OPENSSL
	167	#include <openssl/ssl.h>
	168	#include <openssl/err.h>
	169	#endif
	170
	171	/* On most systems <limits.h> would have given us this, but
	172	* not on some systems (e.g. GNU/Hurd).
	173	*/
	174	#ifndef PATH_MAX
	175	#define PATH_MAX 4096
	176	#endif
	177
	178	#ifndef PRIuMAX
	179	#define PRIuMAX "llu"
	180	#endif
	181
	182	#ifndef PRIu32
	183	#define PRIu32 "u"
	184	#endif
	185
	186	#ifndef PRIx32
	187	#define PRIx32 "x"
	188	#endif
	189
	190	#ifndef PRIo32
	191	#define PRIo32 "o"
	192	#endif
	193
	194	#ifndef PATH_SEP
	195	#define PATH_SEP ':'
	196	#endif
	197
	198	#ifdef HAVE_PATHS_H
	199	#include <paths.h>
	200	#endif
	201	#ifndef _PATH_DEFPATH
	202	#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
	203	#endif
	204
	205	#ifndef STRIP_EXTENSION
	206	#define STRIP_EXTENSION ""
	207	#endif
	208
	209	#ifndef has_dos_drive_prefix
	210	#define has_dos_drive_prefix(path) 0
	211	#endif
	212
	213	#ifndef is_dir_sep
	214	#define is_dir_sep(c) ((c) == '/')
	215	#endif
	216
	217	#ifdef __GNUC__
	218	#define NORETURN __attribute__((__noreturn__))
	219	#define NORETURN_PTR __attribute__((__noreturn__))
	220	#elif defined(_MSC_VER)
	221	#define NORETURN __declspec(noreturn)
	222	#define NORETURN_PTR
	223	#else
	224	#define NORETURN
	225	#define NORETURN_PTR
	226	#ifndef __attribute__
	227	#define __attribute__(x)
	228	#endif
	229	#endif
	230
	231	#include "compat/bswap.h"
	232
	233	/* General helper functions */
	234	extern void vreportf(const char prefix, const char err, va_list params);
	235	extern NORETURN void usage(const char *err);
	236	extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
	237	extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
	238	extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
	239	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
	240	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
	241
	242	extern void set_die_routine(NORETURN_PTR void (routine)(const char err, va_list params));
	243
	244	extern int prefixcmp(const char str, const char prefix);
	245	extern int suffixcmp(const char str, const char suffix);
	246
	247	static inline const char skip_prefix(const char str, const char *prefix)
	248	{
	249	size_t len = strlen(prefix);
	250	return strncmp(str, prefix, len) ? NULL : str + len;
	251	}
	252
	253	#if defined(NO_MMAP) \|\| defined(USE_WIN32_MMAP)
	254
	255	#ifndef PROT_READ
	256	#define PROT_READ 1
	257	#define PROT_WRITE 2
	258	#define MAP_PRIVATE 1
	259	#endif
	260
	261	#define mmap git_mmap
	262	#define munmap git_munmap
	263	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	264	extern int git_munmap(void *start, size_t length);
	265
	266	#else /* NO_MMAP \|\| USE_WIN32_MMAP */
	267
	268	#include <sys/mman.h>
	269
	270	#endif /* NO_MMAP \|\| USE_WIN32_MMAP */
	271
	272	#ifdef NO_MMAP
	273
	274	/* This value must be multiple of (pagesize * 2) */
	275	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
	276
	277	#else /* NO_MMAP */
	278
	279	/* This value must be multiple of (pagesize * 2) */
	280	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	281	(sizeof(void*) >= 8 \
	282	? 1 * 1024 * 1024 * 1024 \
	283	: 32 * 1024 * 1024)
	284
	285	#endif /* NO_MMAP */
	286
	287	#ifndef MAP_FAILED
	288	#define MAP_FAILED ((void *)-1)
	289	#endif
	290
	291	#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
	292	#define on_disk_bytes(st) ((st).st_size)
	293	#else
	294	#define on_disk_bytes(st) ((st).st_blocks * 512)
	295	#endif
	296
	297	#define DEFAULT_PACKED_GIT_LIMIT \
	298	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
	299
	300	#ifdef NO_PREAD
	301	#define pread git_pread
	302	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	303	#endif
	304	/*
	305	* Forward decl that will remind us if its twin in cache.h changes.
	306	* This function is used in compat/pread.c. But we can't include
	307	* cache.h there.
	308	*/
	309	extern ssize_t read_in_full(int fd, void *buf, size_t count);
	310
	311	#ifdef NO_SETENV
	312	#define setenv gitsetenv
	313	extern int gitsetenv(const char , const char , int);
	314	#endif
	315
	316	#ifdef NO_MKDTEMP
	317	#define mkdtemp gitmkdtemp
	318	extern char gitmkdtemp(char );
	319	#endif
	320
	321	#ifdef NO_MKSTEMPS
	322	#define mkstemps gitmkstemps
	323	extern int gitmkstemps(char *, int);
	324	#endif
	325
	326	#ifdef NO_UNSETENV
	327	#define unsetenv gitunsetenv
	328	extern void gitunsetenv(const char *);
	329	#endif
	330
	331	#ifdef NO_STRCASESTR
	332	#define strcasestr gitstrcasestr
	333	extern char gitstrcasestr(const char haystack, const char *needle);
	334	#endif
	335
	336	#ifdef NO_STRLCPY
	337	#define strlcpy gitstrlcpy
	338	extern size_t gitstrlcpy(char , const char , size_t);
	339	#endif
	340
	341	#ifdef NO_STRTOUMAX
	342	#define strtoumax gitstrtoumax
	343	extern uintmax_t gitstrtoumax(const char , char *, int);
	344	#endif
	345
	346	#ifdef NO_STRTOK_R
	347	#define strtok_r gitstrtok_r
	348	extern char gitstrtok_r(char s, const char delim, char *save_ptr);
	349	#endif
	350
	351	#ifdef NO_HSTRERROR
	352	#define hstrerror githstrerror
	353	extern const char *githstrerror(int herror);
	354	#endif
	355
	356	#ifdef NO_MEMMEM
	357	#define memmem gitmemmem
	358	void gitmemmem(const void haystack, size_t haystacklen,
	359	const void *needle, size_t needlelen);
	360	#endif
	361
	362	#ifdef FREAD_READS_DIRECTORIES
	363	#ifdef fopen
	364	#undef fopen
	365	#endif
	366	#define fopen(a,b) git_fopen(a,b)
	367	extern FILE git_fopen(const char, const char*);
	368	#endif
	369
	370	#ifdef SNPRINTF_RETURNS_BOGUS
	371	#define snprintf git_snprintf
	372	extern int git_snprintf(char *str, size_t maxsize,
	373	const char *format, ...);
	374	#define vsnprintf git_vsnprintf
	375	extern int git_vsnprintf(char *str, size_t maxsize,
	376	const char *format, va_list ap);
	377	#endif
	378
	379	#ifdef __GLIBC_PREREQ
	380	#if __GLIBC_PREREQ(2, 1)
	381	#define HAVE_STRCHRNUL
	382	#define HAVE_MEMPCPY
	383	#endif
	384	#endif
	385
	386	#ifndef HAVE_STRCHRNUL
	387	#define strchrnul gitstrchrnul
	388	static inline char gitstrchrnul(const char s, int c)
	389	{
	390	while (s && s != c)
	391	s++;
	392	return (char *)s;
	393	}
	394	#endif
	395
	396	#ifndef HAVE_MEMPCPY
	397	#define mempcpy gitmempcpy
	398	static inline void gitmempcpy(void dest, const void *src, size_t n)
	399	{
	400	return (char *)memcpy(dest, src, n) + n;
	401	}
	402	#endif
	403
	404	#ifdef NO_INET_PTON
	405	int inet_pton(int af, const char src, void dst);
	406	#endif
	407
	408	#ifdef NO_INET_NTOP
	409	const char inet_ntop(int af, const void src, char *dst, size_t size);
	410	#endif
	411
	412	extern void release_pack_memory(size_t, int);
	413
	414	typedef void (*try_to_free_t)(size_t);
	415	extern try_to_free_t set_try_to_free_routine(try_to_free_t);
	416
	417	extern char xstrdup(const char str);
	418	extern void *xmalloc(size_t size);
	419	extern void *xmallocz(size_t size);
	420	extern void xmemdupz(const void data, size_t len);
	421	extern char xstrndup(const char str, size_t len);
	422	extern void xrealloc(void ptr, size_t size);
	423	extern void *xcalloc(size_t nmemb, size_t size);
	424	extern void xmmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	425	extern ssize_t xread(int fd, void *buf, size_t len);
	426	extern ssize_t xwrite(int fd, const void *buf, size_t len);
	427	extern int xdup(int fd);
	428	extern FILE xfdopen(int fd, const char mode);
	429	extern int xmkstemp(char *template);
	430	extern int xmkstemp_mode(char *template, int mode);
	431	extern int odb_mkstemp(char template, size_t limit, const char pattern);
	432	extern int odb_pack_keep(char name, size_t namesz, unsigned char sha1);
	433
	434	static inline size_t xsize_t(off_t len)
	435	{
	436	if (len > (size_t) len)
	437	die("Cannot handle files this big");
	438	return (size_t)len;
	439	}
	440
	441	static inline int has_extension(const char filename, const char ext)
	442	{
	443	size_t len = strlen(filename);
	444	size_t extlen = strlen(ext);
	445	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	446	}
	447
	448	/* Sane ctype - no locale, and works with signed chars */
	449	#undef isascii
	450	#undef isspace
	451	#undef isdigit
	452	#undef isalpha
	453	#undef isalnum
	454	#undef tolower
	455	#undef toupper
	456	extern unsigned char sane_ctype[256];
	457	#define GIT_SPACE 0x01
	458	#define GIT_DIGIT 0x02
	459	#define GIT_ALPHA 0x04
	460	#define GIT_GLOB_SPECIAL 0x08
	461	#define GIT_REGEX_SPECIAL 0x10
	462	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	463	#define isascii(x) (((x) & ~0x7f) == 0)
	464	#define isspace(x) sane_istest(x,GIT_SPACE)
	465	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	466	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	467	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	468	#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
	469	#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL \| GIT_REGEX_SPECIAL)
	470	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	471	#define toupper(x) sane_case((unsigned char)(x), 0)
	472
	473	static inline int sane_case(int x, int high)
	474	{
	475	if (sane_istest(x, GIT_ALPHA))
	476	x = (x & ~0x20) \| high;
	477	return x;
	478	}
	479
	480	static inline int strtoul_ui(char const s, int base, unsigned int result)
	481	{
	482	unsigned long ul;
	483	char *p;
	484
	485	errno = 0;
	486	ul = strtoul(s, &p, base);
	487	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	488	return -1;
	489	*result = ul;
	490	return 0;
	491	}
	492
	493	static inline int strtol_i(char const s, int base, int result)
	494	{
	495	long ul;
	496	char *p;
	497
	498	errno = 0;
	499	ul = strtol(s, &p, base);
	500	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	501	return -1;
	502	*result = ul;
	503	return 0;
	504	}
	505
	506	#ifdef INTERNAL_QSORT
	507	void git_qsort(void *base, size_t nmemb, size_t size,
	508	int(compar)(const void , const void *));
	509	#define qsort git_qsort
	510	#endif
	511
	512	#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
	513	# define FORCE_DIR_SET_GID S_ISGID
	514	#else
	515	# define FORCE_DIR_SET_GID 0
	516	#endif
	517
	518	#ifdef NO_NSEC
	519	#undef USE_NSEC
	520	#define ST_CTIME_NSEC(st) 0
	521	#define ST_MTIME_NSEC(st) 0
	522	#else
	523	#ifdef USE_ST_TIMESPEC
	524	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
	525	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
	526	#else
	527	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
	528	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
	529	#endif
	530	#endif
	531
	532	#ifdef UNRELIABLE_FSTAT
	533	#define fstat_is_reliable() 0
	534	#else
	535	#define fstat_is_reliable() 1
	536	#endif
	537
	538	/*
	539	* Preserves errno, prints a message, but gives no warning for ENOENT.
	540	* Always returns the return value of unlink(2).
	541	*/
	542	int unlink_or_warn(const char *path);
	543	/*
	544	* Likewise for rmdir(2).
	545	*/
	546	int rmdir_or_warn(const char *path);
	547	/*
	548	* Calls the correct function out of {unlink,rmdir}_or_warn based on
	549	* the supplied file mode.
	550	*/
	551	int remove_or_warn(unsigned int mode, const char *path);
	552
	553	#endif