[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__) && \
      !defined(__TANDEM)
#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>
#ifdef __TANDEM /* or HAVE_STRINGS_H or !NO_STRINGS_H? */
#include <strings.h> /* for strcasecmp() */
#endif
#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
#if defined(__MINGW32__)
/* pull in Windows compatibility stuff */
#include "compat/mingw.h"
#elif defined(_MSC_VER)
#include "compat/msvc.h"
#else
#include <sys/wait.h>
#include <sys/resource.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>
#include <sys/un.h>
#ifndef NO_INTTYPES_H
#include <inttypes.h>
#else
#include <stdint.h>
#endif
#ifdef NO_INTPTR_T
/*
 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
 * while on IP16 and IP16L32 it is "int" (resp. "short")
 * Size needs to match (or exceed) 'sizeof(void *)'.
 * We can't take "long long" here as not everybody has it.
 */
typedef long intptr_t;
typedef unsigned long uintptr_t;
#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
#endif

/* used on Mac OS X */
#ifdef PRECOMPOSE_UNICODE
#include "compat/precompose_utf8.h"
#else
#define precompose_str(in,i_nfd2nfc)
#define precompose_argv(c,v)
#define probe_utf8_pathname_composition(a,b)
#endif

#ifdef MKDIR_WO_TRAILING_SLASH
#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
#endif

#ifdef NO_STRUCT_ITIMERVAL
struct itimerval {
	struct timeval it_interval;
	struct timeval it_value;
}
#endif

#ifdef NO_SETITIMER
#define setitimer(which,value,ovalue)
#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

#ifndef find_last_dir_sep
#define find_last_dir_sep(path) strrchr(path, '/')
#endif

#if defined(__HP_cc) && (__HP_cc >= 61000)
#define NORETURN __attribute__((noreturn))
#define NORETURN_PTR
#elif defined(__GNUC__) && !defined(NO_NORETURN)
#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 void vwritef(int fd, 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 void set_error_routine(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);
#define strtoimax gitstrtoimax
extern intmax_t gitstrtoimax(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);
}

/* in ctype.c, for kwset users */
extern const char tolower_trans_tbl[256];

/* Sane ctype - no locale, and works with signed chars */
#undef isascii
#undef isspace
#undef isdigit
#undef isalpha
#undef isalnum
#undef isprint
#undef islower
#undef isupper
#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 GIT_PATHSPEC_MAGIC 0x20
#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 isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
#define islower(x) sane_iscase(x, 1)
#define isupper(x) sane_iscase(x, 0)
#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)
#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)

static inline int sane_case(int x, int high)
{
	if (sane_istest(x, GIT_ALPHA))
		x = (x & ~0x20) | high;
	return x;
}

static inline int sane_iscase(int x, int is_lower)
{
	if (!sane_istest(x, GIT_ALPHA))
		return 0;

	if (is_lower)
		return (x & 0x20) != 0;
	else
		return (x & 0x20) == 0;
}

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

#ifndef va_copy
/*
 * Since an obvious implementation of va_list would be to make it a
 * pointer into the stack frame, a simple assignment will work on
 * many systems.  But let's try to be more portable.
 */
#ifdef __va_copy
#define va_copy(dst, src) __va_copy(dst, src)
#else
#define va_copy(dst, src) ((dst) = (src))
#endif
#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);

/* Call access(2), but warn for any error besides ENOENT. */
int access_or_warn(const char *path, int mode);

/* Warn on an inaccessible file that ought to be accessible */
void warn_on_inaccessible(const char *path);

/* Get the passwd entry for the UID of the current process. */
struct passwd *xgetpwuid_self(void);

#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	!defined(__TANDEM)
	79	#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
	80	#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
	81	#endif
	82	#define _ALL_SOURCE 1
	83	#define _GNU_SOURCE 1
	84	#define _BSD_SOURCE 1
	85	#define _NETBSD_SOURCE 1
	86	#define _SGI_SOURCE 1
	87
	88	#ifdef WIN32 /* Both MinGW and MSVC */
	89	#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
	90	#include <winsock2.h>
	91	#include <windows.h>
	92	#endif
	93
	94	#include <unistd.h>
	95	#include <stdio.h>
	96	#include <sys/stat.h>
	97	#include <fcntl.h>
	98	#include <stddef.h>
	99	#include <stdlib.h>
	100	#include <stdarg.h>
	101	#include <string.h>
	102	#ifdef __TANDEM /* or HAVE_STRINGS_H or !NO_STRINGS_H? */
	103	#include <strings.h> /* for strcasecmp() */
	104	#endif
	105	#include <errno.h>
	106	#include <limits.h>
	107	#include <sys/param.h>
	108	#include <sys/types.h>
	109	#include <dirent.h>
	110	#include <sys/time.h>
	111	#include <time.h>
	112	#include <signal.h>
	113	#include <fnmatch.h>
	114	#include <assert.h>
	115	#include <regex.h>
	116	#include <utime.h>
	117	#include <syslog.h>
	118	#ifndef NO_SYS_POLL_H
	119	#include <sys/poll.h>
	120	#else
	121	#include <poll.h>
	122	#endif
	123	#if defined(__MINGW32__)
	124	/* pull in Windows compatibility stuff */
	125	#include "compat/mingw.h"
	126	#elif defined(_MSC_VER)
	127	#include "compat/msvc.h"
	128	#else
	129	#include <sys/wait.h>
	130	#include <sys/resource.h>
	131	#include <sys/socket.h>
	132	#include <sys/ioctl.h>
	133	#include <termios.h>
	134	#ifndef NO_SYS_SELECT_H
	135	#include <sys/select.h>
	136	#endif
	137	#include <netinet/in.h>
	138	#include <netinet/tcp.h>
	139	#include <arpa/inet.h>
	140	#include <netdb.h>
	141	#include <pwd.h>
	142	#include <sys/un.h>
	143	#ifndef NO_INTTYPES_H
	144	#include <inttypes.h>
	145	#else
	146	#include <stdint.h>
	147	#endif
	148	#ifdef NO_INTPTR_T
	149	/*
	150	* On I16LP32, ILP32 and LP64 "long" is the save bet, however
	151	* on LLP86, IL33LLP64 and P64 it needs to be "long long",
	152	* while on IP16 and IP16L32 it is "int" (resp. "short")
	153	* Size needs to match (or exceed) 'sizeof(void *)'.
	154	* We can't take "long long" here as not everybody has it.
	155	*/
	156	typedef long intptr_t;
	157	typedef unsigned long uintptr_t;
	158	#endif
	159	#if defined(__CYGWIN__)
	160	#undef _XOPEN_SOURCE
	161	#include <grp.h>
	162	#define _XOPEN_SOURCE 600
	163	#include "compat/cygwin.h"
	164	#else
	165	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
	166	#include <grp.h>
	167	#define _ALL_SOURCE 1
	168	#endif
	169	#endif
	170
	171	/* used on Mac OS X */
	172	#ifdef PRECOMPOSE_UNICODE
	173	#include "compat/precompose_utf8.h"
	174	#else
	175	#define precompose_str(in,i_nfd2nfc)
	176	#define precompose_argv(c,v)
	177	#define probe_utf8_pathname_composition(a,b)
	178	#endif
	179
	180	#ifdef MKDIR_WO_TRAILING_SLASH
	181	#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
	182	extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
	183	#endif
	184
	185	#ifdef NO_STRUCT_ITIMERVAL
	186	struct itimerval {
	187	struct timeval it_interval;
	188	struct timeval it_value;
	189	}
	190	#endif
	191
	192	#ifdef NO_SETITIMER
	193	#define setitimer(which,value,ovalue)
	194	#endif
	195
	196	#ifndef NO_LIBGEN_H
	197	#include <libgen.h>
	198	#else
	199	#define basename gitbasename
	200	extern char gitbasename(char );
	201	#endif
	202
	203	#ifndef NO_ICONV
	204	#include <iconv.h>
	205	#endif
	206
	207	#ifndef NO_OPENSSL
	208	#include <openssl/ssl.h>
	209	#include <openssl/err.h>
	210	#endif
	211
	212	/* On most systems <limits.h> would have given us this, but
	213	* not on some systems (e.g. GNU/Hurd).
	214	*/
	215	#ifndef PATH_MAX
	216	#define PATH_MAX 4096
	217	#endif
	218
	219	#ifndef PRIuMAX
	220	#define PRIuMAX "llu"
	221	#endif
	222
	223	#ifndef PRIu32
	224	#define PRIu32 "u"
	225	#endif
	226
	227	#ifndef PRIx32
	228	#define PRIx32 "x"
	229	#endif
	230
	231	#ifndef PRIo32
	232	#define PRIo32 "o"
	233	#endif
	234
	235	#ifndef PATH_SEP
	236	#define PATH_SEP ':'
	237	#endif
	238
	239	#ifdef HAVE_PATHS_H
	240	#include <paths.h>
	241	#endif
	242	#ifndef _PATH_DEFPATH
	243	#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
	244	#endif
	245
	246	#ifndef STRIP_EXTENSION
	247	#define STRIP_EXTENSION ""
	248	#endif
	249
	250	#ifndef has_dos_drive_prefix
	251	#define has_dos_drive_prefix(path) 0
	252	#endif
	253
	254	#ifndef is_dir_sep
	255	#define is_dir_sep(c) ((c) == '/')
	256	#endif
	257
	258	#ifndef find_last_dir_sep
	259	#define find_last_dir_sep(path) strrchr(path, '/')
	260	#endif
	261
	262	#if defined(__HP_cc) && (__HP_cc >= 61000)
	263	#define NORETURN __attribute__((noreturn))
	264	#define NORETURN_PTR
	265	#elif defined(__GNUC__) && !defined(NO_NORETURN)
	266	#define NORETURN __attribute__((__noreturn__))
	267	#define NORETURN_PTR __attribute__((__noreturn__))
	268	#elif defined(_MSC_VER)
	269	#define NORETURN __declspec(noreturn)
	270	#define NORETURN_PTR
	271	#else
	272	#define NORETURN
	273	#define NORETURN_PTR
	274	#ifndef __attribute__
	275	#define __attribute__(x)
	276	#endif
	277	#endif
	278
	279	#include "compat/bswap.h"
	280
	281	/* General helper functions */
	282	extern void vreportf(const char prefix, const char err, va_list params);
	283	extern void vwritef(int fd, const char prefix, const char err, va_list params);
	284	extern NORETURN void usage(const char *err);
	285	extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
	286	extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
	287	extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
	288	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
	289	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
	290
	291	extern void set_die_routine(NORETURN_PTR void (routine)(const char err, va_list params));
	292	extern void set_error_routine(void (routine)(const char err, va_list params));
	293
	294	extern int prefixcmp(const char str, const char prefix);
	295	extern int suffixcmp(const char str, const char suffix);
	296
	297	static inline const char skip_prefix(const char str, const char *prefix)
	298	{
	299	size_t len = strlen(prefix);
	300	return strncmp(str, prefix, len) ? NULL : str + len;
	301	}
	302
	303	#if defined(NO_MMAP) \|\| defined(USE_WIN32_MMAP)
	304
	305	#ifndef PROT_READ
	306	#define PROT_READ 1
	307	#define PROT_WRITE 2
	308	#define MAP_PRIVATE 1
	309	#endif
	310
	311	#define mmap git_mmap
	312	#define munmap git_munmap
	313	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	314	extern int git_munmap(void *start, size_t length);
	315
	316	#else /* NO_MMAP \|\| USE_WIN32_MMAP */
	317
	318	#include <sys/mman.h>
	319
	320	#endif /* NO_MMAP \|\| USE_WIN32_MMAP */
	321
	322	#ifdef NO_MMAP
	323
	324	/* This value must be multiple of (pagesize * 2) */
	325	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
	326
	327	#else /* NO_MMAP */
	328
	329	/* This value must be multiple of (pagesize * 2) */
	330	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	331	(sizeof(void*) >= 8 \
	332	? 1 * 1024 * 1024 * 1024 \
	333	: 32 * 1024 * 1024)
	334
	335	#endif /* NO_MMAP */
	336
	337	#ifndef MAP_FAILED
	338	#define MAP_FAILED ((void *)-1)
	339	#endif
	340
	341	#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
	342	#define on_disk_bytes(st) ((st).st_size)
	343	#else
	344	#define on_disk_bytes(st) ((st).st_blocks * 512)
	345	#endif
	346
	347	#define DEFAULT_PACKED_GIT_LIMIT \
	348	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
	349
	350	#ifdef NO_PREAD
	351	#define pread git_pread
	352	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	353	#endif
	354	/*
	355	* Forward decl that will remind us if its twin in cache.h changes.
	356	* This function is used in compat/pread.c. But we can't include
	357	* cache.h there.
	358	*/
	359	extern ssize_t read_in_full(int fd, void *buf, size_t count);
	360
	361	#ifdef NO_SETENV
	362	#define setenv gitsetenv
	363	extern int gitsetenv(const char , const char , int);
	364	#endif
	365
	366	#ifdef NO_MKDTEMP
	367	#define mkdtemp gitmkdtemp
	368	extern char gitmkdtemp(char );
	369	#endif
	370
	371	#ifdef NO_MKSTEMPS
	372	#define mkstemps gitmkstemps
	373	extern int gitmkstemps(char *, int);
	374	#endif
	375
	376	#ifdef NO_UNSETENV
	377	#define unsetenv gitunsetenv
	378	extern void gitunsetenv(const char *);
	379	#endif
	380
	381	#ifdef NO_STRCASESTR
	382	#define strcasestr gitstrcasestr
	383	extern char gitstrcasestr(const char haystack, const char *needle);
	384	#endif
	385
	386	#ifdef NO_STRLCPY
	387	#define strlcpy gitstrlcpy
	388	extern size_t gitstrlcpy(char , const char , size_t);
	389	#endif
	390
	391	#ifdef NO_STRTOUMAX
	392	#define strtoumax gitstrtoumax
	393	extern uintmax_t gitstrtoumax(const char , char *, int);
	394	#define strtoimax gitstrtoimax
	395	extern intmax_t gitstrtoimax(const char , char *, int);
	396	#endif
	397
	398	#ifdef NO_STRTOK_R
	399	#define strtok_r gitstrtok_r
	400	extern char gitstrtok_r(char s, const char delim, char *save_ptr);
	401	#endif
	402
	403	#ifdef NO_HSTRERROR
	404	#define hstrerror githstrerror
	405	extern const char *githstrerror(int herror);
	406	#endif
	407
	408	#ifdef NO_MEMMEM
	409	#define memmem gitmemmem
	410	void gitmemmem(const void haystack, size_t haystacklen,
	411	const void *needle, size_t needlelen);
	412	#endif
	413
	414	#ifdef FREAD_READS_DIRECTORIES
	415	#ifdef fopen
	416	#undef fopen
	417	#endif
	418	#define fopen(a,b) git_fopen(a,b)
	419	extern FILE git_fopen(const char, const char*);
	420	#endif
	421
	422	#ifdef SNPRINTF_RETURNS_BOGUS
	423	#define snprintf git_snprintf
	424	extern int git_snprintf(char *str, size_t maxsize,
	425	const char *format, ...);
	426	#define vsnprintf git_vsnprintf
	427	extern int git_vsnprintf(char *str, size_t maxsize,
	428	const char *format, va_list ap);
	429	#endif
	430
	431	#ifdef __GLIBC_PREREQ
	432	#if __GLIBC_PREREQ(2, 1)
	433	#define HAVE_STRCHRNUL
	434	#define HAVE_MEMPCPY
	435	#endif
	436	#endif
	437
	438	#ifndef HAVE_STRCHRNUL
	439	#define strchrnul gitstrchrnul
	440	static inline char gitstrchrnul(const char s, int c)
	441	{
	442	while (s && s != c)
	443	s++;
	444	return (char *)s;
	445	}
	446	#endif
	447
	448	#ifndef HAVE_MEMPCPY
	449	#define mempcpy gitmempcpy
	450	static inline void gitmempcpy(void dest, const void *src, size_t n)
	451	{
	452	return (char *)memcpy(dest, src, n) + n;
	453	}
	454	#endif
	455
	456	#ifdef NO_INET_PTON
	457	int inet_pton(int af, const char src, void dst);
	458	#endif
	459
	460	#ifdef NO_INET_NTOP
	461	const char inet_ntop(int af, const void src, char *dst, size_t size);
	462	#endif
	463
	464	extern void release_pack_memory(size_t, int);
	465
	466	typedef void (*try_to_free_t)(size_t);
	467	extern try_to_free_t set_try_to_free_routine(try_to_free_t);
	468
	469	extern char xstrdup(const char str);
	470	extern void *xmalloc(size_t size);
	471	extern void *xmallocz(size_t size);
	472	extern void xmemdupz(const void data, size_t len);
	473	extern char xstrndup(const char str, size_t len);
	474	extern void xrealloc(void ptr, size_t size);
	475	extern void *xcalloc(size_t nmemb, size_t size);
	476	extern void xmmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	477	extern ssize_t xread(int fd, void *buf, size_t len);
	478	extern ssize_t xwrite(int fd, const void *buf, size_t len);
	479	extern int xdup(int fd);
	480	extern FILE xfdopen(int fd, const char mode);
	481	extern int xmkstemp(char *template);
	482	extern int xmkstemp_mode(char *template, int mode);
	483	extern int odb_mkstemp(char template, size_t limit, const char pattern);
	484	extern int odb_pack_keep(char name, size_t namesz, unsigned char sha1);
	485
	486	static inline size_t xsize_t(off_t len)
	487	{
	488	if (len > (size_t) len)
	489	die("Cannot handle files this big");
	490	return (size_t)len;
	491	}
	492
	493	static inline int has_extension(const char filename, const char ext)
	494	{
	495	size_t len = strlen(filename);
	496	size_t extlen = strlen(ext);
	497	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	498	}
	499
	500	/* in ctype.c, for kwset users */
	501	extern const char tolower_trans_tbl[256];
	502
	503	/* Sane ctype - no locale, and works with signed chars */
	504	#undef isascii
	505	#undef isspace
	506	#undef isdigit
	507	#undef isalpha
	508	#undef isalnum
	509	#undef isprint
	510	#undef islower
	511	#undef isupper
	512	#undef tolower
	513	#undef toupper
	514	extern unsigned char sane_ctype[256];
	515	#define GIT_SPACE 0x01
	516	#define GIT_DIGIT 0x02
	517	#define GIT_ALPHA 0x04
	518	#define GIT_GLOB_SPECIAL 0x08
	519	#define GIT_REGEX_SPECIAL 0x10
	520	#define GIT_PATHSPEC_MAGIC 0x20
	521	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	522	#define isascii(x) (((x) & ~0x7f) == 0)
	523	#define isspace(x) sane_istest(x,GIT_SPACE)
	524	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	525	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	526	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	527	#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
	528	#define islower(x) sane_iscase(x, 1)
	529	#define isupper(x) sane_iscase(x, 0)
	530	#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
	531	#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL \| GIT_REGEX_SPECIAL)
	532	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	533	#define toupper(x) sane_case((unsigned char)(x), 0)
	534	#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
	535
	536	static inline int sane_case(int x, int high)
	537	{
	538	if (sane_istest(x, GIT_ALPHA))
	539	x = (x & ~0x20) \| high;
	540	return x;
	541	}
	542
	543	static inline int sane_iscase(int x, int is_lower)
	544	{
	545	if (!sane_istest(x, GIT_ALPHA))
	546	return 0;
	547
	548	if (is_lower)
	549	return (x & 0x20) != 0;
	550	else
	551	return (x & 0x20) == 0;
	552	}
	553
	554	static inline int strtoul_ui(char const s, int base, unsigned int result)
	555	{
	556	unsigned long ul;
	557	char *p;
	558
	559	errno = 0;
	560	ul = strtoul(s, &p, base);
	561	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	562	return -1;
	563	*result = ul;
	564	return 0;
	565	}
	566
	567	static inline int strtol_i(char const s, int base, int result)
	568	{
	569	long ul;
	570	char *p;
	571
	572	errno = 0;
	573	ul = strtol(s, &p, base);
	574	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	575	return -1;
	576	*result = ul;
	577	return 0;
	578	}
	579
	580	#ifdef INTERNAL_QSORT
	581	void git_qsort(void *base, size_t nmemb, size_t size,
	582	int(compar)(const void , const void *));
	583	#define qsort git_qsort
	584	#endif
	585
	586	#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
	587	# define FORCE_DIR_SET_GID S_ISGID
	588	#else
	589	# define FORCE_DIR_SET_GID 0
	590	#endif
	591
	592	#ifdef NO_NSEC
	593	#undef USE_NSEC
	594	#define ST_CTIME_NSEC(st) 0
	595	#define ST_MTIME_NSEC(st) 0
	596	#else
	597	#ifdef USE_ST_TIMESPEC
	598	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
	599	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
	600	#else
	601	#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
	602	#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
	603	#endif
	604	#endif
	605
	606	#ifdef UNRELIABLE_FSTAT
	607	#define fstat_is_reliable() 0
	608	#else
	609	#define fstat_is_reliable() 1
	610	#endif
	611
	612	#ifndef va_copy
	613	/*
	614	* Since an obvious implementation of va_list would be to make it a
	615	* pointer into the stack frame, a simple assignment will work on
	616	* many systems. But let's try to be more portable.
	617	*/
	618	#ifdef __va_copy
	619	#define va_copy(dst, src) __va_copy(dst, src)
	620	#else
	621	#define va_copy(dst, src) ((dst) = (src))
	622	#endif
	623	#endif
	624
	625	/*
	626	* Preserves errno, prints a message, but gives no warning for ENOENT.
	627	* Always returns the return value of unlink(2).
	628	*/
	629	int unlink_or_warn(const char *path);
	630	/*
	631	* Likewise for rmdir(2).
	632	*/
	633	int rmdir_or_warn(const char *path);
	634	/*
	635	* Calls the correct function out of {unlink,rmdir}_or_warn based on
	636	* the supplied file mode.
	637	*/
	638	int remove_or_warn(unsigned int mode, const char *path);
	639
	640	/* Call access(2), but warn for any error besides ENOENT. */
	641	int access_or_warn(const char *path, int mode);
	642
	643	/* Warn on an inaccessible file that ought to be accessible */
	644	void warn_on_inaccessible(const char *path);
	645
	646	/* Get the passwd entry for the UID of the current process. */
	647	struct passwd *xgetpwuid_self(void);
	648
	649	#endif