зеркало из https://github.com/microsoft/git.git
502 строки
12 KiB
C
502 строки
12 KiB
C
#ifndef GIT_COMPAT_UTIL_H
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#define GIT_COMPAT_UTIL_H
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#define _FILE_OFFSET_BITS 64
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#ifndef FLEX_ARRAY
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/*
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* See if our compiler is known to support flexible array members.
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*/
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
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# define FLEX_ARRAY /* empty */
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#elif defined(__GNUC__)
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# if (__GNUC__ >= 3)
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# define FLEX_ARRAY /* empty */
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# else
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# define FLEX_ARRAY 0 /* older GNU extension */
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# endif
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#endif
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/*
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* Otherwise, default to safer but a bit wasteful traditional style
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*/
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#ifndef FLEX_ARRAY
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# define FLEX_ARRAY 1
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#endif
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#endif
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#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
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#define bitsizeof(x) (CHAR_BIT * sizeof(x))
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#ifdef __GNUC__
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#define TYPEOF(x) (__typeof__(x))
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#else
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#define TYPEOF(x)
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#endif
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#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
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#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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/* Approximation of the length of the decimal representation of this type. */
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#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
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#if defined(__sun__)
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/*
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* On Solaris, when _XOPEN_EXTENDED is set, its header file
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* forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
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* setting to say we are XPG5 or XPG6. Also on Solaris,
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* XPG6 programs must be compiled with a c99 compiler, while
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* non XPG6 programs must be compiled with a pre-c99 compiler.
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*/
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# if __STDC_VERSION__ - 0 >= 199901L
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# define _XOPEN_SOURCE 600
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# else
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# define _XOPEN_SOURCE 500
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# endif
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#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
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!defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__)
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#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
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#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
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#endif
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#define _ALL_SOURCE 1
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#define _GNU_SOURCE 1
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#define _BSD_SOURCE 1
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#define _NETBSD_SOURCE 1
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#define _SGI_SOURCE 1
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#ifdef WIN32 /* Both MinGW and MSVC */
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#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
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#include <winsock2.h>
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#include <windows.h>
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#endif
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/time.h>
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#include <time.h>
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#include <signal.h>
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#include <fnmatch.h>
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#include <assert.h>
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#include <regex.h>
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#include <utime.h>
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#ifndef __MINGW32__
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#include <sys/wait.h>
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#include <sys/poll.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#ifndef NO_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <inttypes.h>
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#if defined(__CYGWIN__)
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#undef _XOPEN_SOURCE
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#include <grp.h>
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#define _XOPEN_SOURCE 600
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#include "compat/cygwin.h"
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#else
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#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
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#include <grp.h>
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#define _ALL_SOURCE 1
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#endif
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#else /* __MINGW32__ */
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/* pull in Windows compatibility stuff */
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#include "compat/mingw.h"
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#endif /* __MINGW32__ */
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#ifdef _MSC_VER
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#include "compat/msvc.h"
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#endif
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#ifndef NO_LIBGEN_H
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#include <libgen.h>
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#else
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#define basename gitbasename
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extern char *gitbasename(char *);
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#endif
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#ifndef NO_ICONV
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#include <iconv.h>
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#endif
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#ifndef NO_OPENSSL
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#endif
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/* On most systems <limits.h> would have given us this, but
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* not on some systems (e.g. GNU/Hurd).
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*/
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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#ifndef PRIuMAX
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#define PRIuMAX "llu"
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#endif
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#ifndef PRIu32
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#define PRIu32 "u"
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#endif
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#ifndef PRIx32
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#define PRIx32 "x"
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#endif
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#ifndef PATH_SEP
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#define PATH_SEP ':'
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#endif
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#ifdef HAVE_PATHS_H
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#include <paths.h>
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#endif
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#ifndef _PATH_DEFPATH
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#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
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#endif
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#ifndef STRIP_EXTENSION
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#define STRIP_EXTENSION ""
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#endif
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#ifndef has_dos_drive_prefix
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#define has_dos_drive_prefix(path) 0
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#endif
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#ifndef is_dir_sep
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#define is_dir_sep(c) ((c) == '/')
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#endif
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#ifdef __GNUC__
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#define NORETURN __attribute__((__noreturn__))
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#define NORETURN_PTR __attribute__((__noreturn__))
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#elif defined(_MSC_VER)
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#define NORETURN __declspec(noreturn)
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#define NORETURN_PTR
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#else
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#define NORETURN
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#define NORETURN_PTR
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#ifndef __attribute__
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#define __attribute__(x)
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#endif
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#endif
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#include "compat/bswap.h"
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/* General helper functions */
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extern NORETURN void usage(const char *err);
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extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
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extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
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extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
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extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
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extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
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extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
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extern int prefixcmp(const char *str, const char *prefix);
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extern int suffixcmp(const char *str, const char *suffix);
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static inline const char *skip_prefix(const char *str, const char *prefix)
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{
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size_t len = strlen(prefix);
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return strncmp(str, prefix, len) ? NULL : str + len;
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}
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#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
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#ifndef PROT_READ
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define MAP_PRIVATE 1
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#define MAP_FAILED ((void*)-1)
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#endif
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#define mmap git_mmap
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#define munmap git_munmap
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extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
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extern int git_munmap(void *start, size_t length);
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#else /* NO_MMAP || USE_WIN32_MMAP */
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#include <sys/mman.h>
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#endif /* NO_MMAP || USE_WIN32_MMAP */
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#ifdef NO_MMAP
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/* This value must be multiple of (pagesize * 2) */
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#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
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#else /* NO_MMAP */
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/* This value must be multiple of (pagesize * 2) */
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#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
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(sizeof(void*) >= 8 \
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? 1 * 1024 * 1024 * 1024 \
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: 32 * 1024 * 1024)
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#endif /* NO_MMAP */
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#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
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#define on_disk_bytes(st) ((st).st_size)
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#else
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#define on_disk_bytes(st) ((st).st_blocks * 512)
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#endif
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#define DEFAULT_PACKED_GIT_LIMIT \
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((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
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#ifdef NO_PREAD
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#define pread git_pread
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extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
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#endif
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/*
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* Forward decl that will remind us if its twin in cache.h changes.
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* This function is used in compat/pread.c. But we can't include
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* cache.h there.
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*/
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extern ssize_t read_in_full(int fd, void *buf, size_t count);
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#ifdef NO_SETENV
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#define setenv gitsetenv
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extern int gitsetenv(const char *, const char *, int);
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#endif
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#ifdef NO_MKDTEMP
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#define mkdtemp gitmkdtemp
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extern char *gitmkdtemp(char *);
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#endif
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#ifdef NO_MKSTEMPS
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#define mkstemps gitmkstemps
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extern int gitmkstemps(char *, int);
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#endif
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#ifdef NO_UNSETENV
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#define unsetenv gitunsetenv
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extern void gitunsetenv(const char *);
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#endif
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#ifdef NO_STRCASESTR
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#define strcasestr gitstrcasestr
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extern char *gitstrcasestr(const char *haystack, const char *needle);
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#endif
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#ifdef NO_STRLCPY
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#define strlcpy gitstrlcpy
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extern size_t gitstrlcpy(char *, const char *, size_t);
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#endif
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#ifdef NO_STRTOUMAX
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#define strtoumax gitstrtoumax
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extern uintmax_t gitstrtoumax(const char *, char **, int);
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#endif
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#ifdef NO_HSTRERROR
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#define hstrerror githstrerror
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extern const char *githstrerror(int herror);
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#endif
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#ifdef NO_MEMMEM
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#define memmem gitmemmem
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void *gitmemmem(const void *haystack, size_t haystacklen,
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const void *needle, size_t needlelen);
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#endif
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#ifdef FREAD_READS_DIRECTORIES
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#ifdef fopen
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#undef fopen
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#endif
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#define fopen(a,b) git_fopen(a,b)
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extern FILE *git_fopen(const char*, const char*);
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#endif
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#ifdef SNPRINTF_RETURNS_BOGUS
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#define snprintf git_snprintf
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extern int git_snprintf(char *str, size_t maxsize,
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const char *format, ...);
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#define vsnprintf git_vsnprintf
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extern int git_vsnprintf(char *str, size_t maxsize,
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const char *format, va_list ap);
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#endif
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#ifdef __GLIBC_PREREQ
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#if __GLIBC_PREREQ(2, 1)
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#define HAVE_STRCHRNUL
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#define HAVE_MEMPCPY
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#endif
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#endif
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#ifndef HAVE_STRCHRNUL
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#define strchrnul gitstrchrnul
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static inline char *gitstrchrnul(const char *s, int c)
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{
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while (*s && *s != c)
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s++;
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return (char *)s;
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}
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#endif
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#ifndef HAVE_MEMPCPY
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#define mempcpy gitmempcpy
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static inline void *gitmempcpy(void *dest, const void *src, size_t n)
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{
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return (char *)memcpy(dest, src, n) + n;
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}
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#endif
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extern void release_pack_memory(size_t, int);
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extern void set_try_to_free_routine(void (*routine)(size_t));
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extern char *xstrdup(const char *str);
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extern void *xmalloc(size_t size);
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extern void *xmallocz(size_t size);
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extern void *xmemdupz(const void *data, size_t len);
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extern char *xstrndup(const char *str, size_t len);
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extern void *xrealloc(void *ptr, size_t size);
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extern void *xcalloc(size_t nmemb, size_t size);
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extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
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extern ssize_t xread(int fd, void *buf, size_t len);
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extern ssize_t xwrite(int fd, const void *buf, size_t len);
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extern int xdup(int fd);
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extern FILE *xfdopen(int fd, const char *mode);
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extern int xmkstemp(char *template);
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extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
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extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1);
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static inline size_t xsize_t(off_t len)
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{
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return (size_t)len;
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}
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static inline int has_extension(const char *filename, const char *ext)
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{
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size_t len = strlen(filename);
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size_t extlen = strlen(ext);
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return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
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}
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/* Sane ctype - no locale, and works with signed chars */
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#undef isascii
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#undef isspace
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#undef isdigit
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#undef isalpha
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#undef isalnum
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#undef tolower
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#undef toupper
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extern unsigned char sane_ctype[256];
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#define GIT_SPACE 0x01
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#define GIT_DIGIT 0x02
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#define GIT_ALPHA 0x04
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#define GIT_GLOB_SPECIAL 0x08
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#define GIT_REGEX_SPECIAL 0x10
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#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
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#define isascii(x) (((x) & ~0x7f) == 0)
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#define isspace(x) sane_istest(x,GIT_SPACE)
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#define isdigit(x) sane_istest(x,GIT_DIGIT)
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#define isalpha(x) sane_istest(x,GIT_ALPHA)
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#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
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#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
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#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
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#define tolower(x) sane_case((unsigned char)(x), 0x20)
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#define toupper(x) sane_case((unsigned char)(x), 0)
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static inline int sane_case(int x, int high)
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{
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if (sane_istest(x, GIT_ALPHA))
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x = (x & ~0x20) | high;
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return x;
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}
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static inline int strtoul_ui(char const *s, int base, unsigned int *result)
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{
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unsigned long ul;
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char *p;
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errno = 0;
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ul = strtoul(s, &p, base);
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if (errno || *p || p == s || (unsigned int) ul != ul)
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return -1;
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*result = ul;
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return 0;
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}
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static inline int strtol_i(char const *s, int base, int *result)
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{
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long ul;
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char *p;
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errno = 0;
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ul = strtol(s, &p, base);
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if (errno || *p || p == s || (int) ul != ul)
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return -1;
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*result = ul;
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return 0;
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}
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#ifdef INTERNAL_QSORT
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void git_qsort(void *base, size_t nmemb, size_t size,
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int(*compar)(const void *, const void *));
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#define qsort git_qsort
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#endif
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#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
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# define FORCE_DIR_SET_GID S_ISGID
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#else
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# define FORCE_DIR_SET_GID 0
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#endif
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#ifdef NO_NSEC
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#undef USE_NSEC
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#define ST_CTIME_NSEC(st) 0
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#define ST_MTIME_NSEC(st) 0
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#else
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#ifdef USE_ST_TIMESPEC
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#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
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#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
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#else
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#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
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#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
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#endif
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#endif
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#ifdef UNRELIABLE_FSTAT
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#define fstat_is_reliable() 0
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#else
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#define fstat_is_reliable() 1
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#endif
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/*
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* Preserves errno, prints a message, but gives no warning for ENOENT.
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* Always returns the return value of unlink(2).
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*/
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int unlink_or_warn(const char *path);
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/*
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* Likewise for rmdir(2).
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*/
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int rmdir_or_warn(const char *path);
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/*
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* Calls the correct function out of {unlink,rmdir}_or_warn based on
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* the supplied file mode.
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*/
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int remove_or_warn(unsigned int mode, const char *path);
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#endif
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