394 lines
9.1 KiB
C
394 lines
9.1 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)
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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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#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 << (sizeof(x) * 8 - (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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/* 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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#define _ALL_SOURCE 1
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#define _GNU_SOURCE 1
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#define _BSD_SOURCE 1
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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 <sys/statfs.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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#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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#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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#include "../../../include/linux/magic.h"
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#ifndef NO_ICONV
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#include <iconv.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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#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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#else
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#define NORETURN
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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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/* General helper functions */
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extern void usage(const char *err) NORETURN;
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extern void die(const char *err, ...) NORETURN __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(void (*routine)(const char *err, va_list params) NORETURN);
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extern int prefixcmp(const char *str, const char *prefix);
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extern time_t tm_to_time_t(const struct tm *tm);
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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_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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#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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/*
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* Wrappers:
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*/
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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 *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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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 isprint
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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 GIT_PRINT_EXTRA 0x20
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#define GIT_PRINT 0x3E
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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 isprint(x) sane_istest(x,GIT_PRINT)
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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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#endif
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