common/git-compat-util.h

   1 #ifndef GIT_COMPAT_UTIL_H
   2 #define GIT_COMPAT_UTIL_H
   3
   4 #ifndef FLEX_ARRAY
   5 /*
   6  * See if our compiler is known to support flexible array members.
   7  */
   8 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
   9 # define FLEX_ARRAY /* empty */
  10 #elif defined(__GNUC__)
  11 # if (__GNUC__ >= 3)
  12 #  define FLEX_ARRAY /* empty */
  13 # else
  14 #  define FLEX_ARRAY 0 /* older GNU extension */
  15 # endif
  16 #elif defined(_MSC_VER)
  17 #define FLEX_ARRAY /* empty */
  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
  30 #include <ctype.h>
  31 #include <unistd.h>
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <fcntl.h>
  36 #include <stdarg.h>
  37 #include <errno.h>
  38 #include <limits.h>
  39 #include <time.h>
  40 #include <signal.h>
  41 #include <sys/stat.h>
  42 #include <sys/time.h>
  43 #ifdef _WIN32
  44 #include <io.h>
  45 #include <sys/utime.h>
  46 #include <process.h>
  47 #endif /* _WIN32 */
  48
  49 #if defined(_MSC_VER)
  50 /* MSVC defines mkdir here, not in io.h */
  51 #include <direct.h>
  52 #endif
  53
  54 #ifndef PATH_MAX
  55 /*
  56  * with MSVC, if we define _POSIX_ we loose half of useful functions
  57  * (e.g. chmod, open, close), otherwise we don't have PATH_MAX
  58  * because of #ifdef in <io.h>.
  59  * So, when build under MSVC, don't define _POSIX_
  60  */
  61 #define PATH_MAX            512
  62 #endif
  63
  64 #ifdef _WIN32
  65 /* from mingw/include/sys/types.h */
  66 #ifndef _SSIZE_T_
  67 #define _SSIZE_T_
  68 typedef long _ssize_t;
  69
  70 #ifndef _NO_OLDNAMES
  71 typedef _ssize_t ssize_t;
  72 #endif
  73 #endif /* Not _SSIZE_T_ */
  74
  75 #ifndef _MODE_T_
  76 #define _MODE_T_
  77 typedef unsigned short _mode_t;
  78
  79 #ifndef _NO_OLDNAMES
  80 typedef _mode_t mode_t;
  81 #endif
  82 #endif  /* Not _MODE_T_ */
  83
  84
  85 /* from mingw/include/io.h */
  86 /* Some defines for _access nAccessMode (MS doesn't define them, but
  87  * it doesn't seem to hurt to add them). */
  88 #define F_OK    0       /* Check for file existence */
  89 /* Well maybe it does hurt.  On newer versions of MSVCRT, an access mode
  90    of 1 causes invalid parameter error. */
  91 #define X_OK    1       /* MS access() doesn't check for execute permission. */
  92 #define W_OK    2       /* Check for write permission */
  93 #define R_OK    4       /* Check for read permission */
  94 #endif /* _WIN32 */
  95
  96 /* from mingw/include/string.h */
  97 #define strcasecmp(__sz1, __sz2) (_stricmp((__sz1), (__sz2)))
  98
  99 /* from mingw/include/stdint.h */
 100 typedef unsigned   uint32_t;
 101
 102 #ifdef __GNUC__
 103 #define NORETURN __attribute__((__noreturn__))
 104 #else
 105
 106 #if defined(_MSC_VER)
 107 #define NORETURN __declspec(noreturn)
 108 #else
 109 #define NORETURN
 110 #endif /* _MSC_VER */
 111
 112 #ifndef __attribute__
 113 #define __attribute__(x)
 114 #endif
 115 #define __CRT_INLINE
 116 #endif
 117
 118 extern int error(const char * format, ...);
 119 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 120
 121 #ifndef HAVE_STRCHRNUL
 122 #define strchrnul gitstrchrnul
 123 static inline char *gitstrchrnul(const char *s, int c)
 124 {
 125         while (*s && *s != c)
 126                 s++;
 127         return (char *)s;
 128 }
 129 #endif
 130
 131 extern time_t tm_to_time_t(const struct tm *tm);
 132
 133 extern void release_pack_memory(size_t, int);
 134
 135 extern char *xstrdup(const char *str);
 136 extern void *xmalloc(size_t size);
 137 extern void *xrealloc(void *ptr, size_t size);
 138 extern void *xcalloc(size_t nmemb, size_t size);
 139 extern ssize_t xread(int fd, void *buf, size_t len);
 140
 141 #ifdef NO_STRLCPY
 142 #define strlcpy gitstrlcpy
 143 extern size_t gitstrlcpy(char *, const char *, size_t);
 144 #endif
 145
 146 #ifdef _WIN32
 147 #define snprintf _snprintf
 148 #endif
 149
 150 #ifdef NO_MMAP
 151
 152 #ifndef PROT_READ
 153 #define PROT_READ 1
 154 #define PROT_WRITE 2
 155 #define MAP_PRIVATE 1
 156 #define MAP_FAILED ((void*)-1)
 157 #endif
 158
 159 #define mmap git_mmap
 160 #define munmap git_munmap
 161 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 162 extern int git_munmap(void *start, size_t length);
 163
 164 /* This value must be multiple of (pagesize * 2) */
 165 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 166
 167 #else /* NO_MMAP */
 168
 169 #include <sys/mman.h>
 170
 171 /* This value must be multiple of (pagesize * 2) */
 172 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 173         (sizeof(void*) >= 8 \
 174                 ?  1 * 1024 * 1024 * 1024 \
 175                 : 32 * 1024 * 1024)
 176
 177 #endif /* NO_MMAP */
 178
 179 #ifdef NO_PREAD
 180 #define pread git_pread
 181 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 182 #endif
 183 /*
 184  * Forward decl that will remind us if its twin in cache.h changes.
 185  * This function is used in compat/pread.c.  But we can't include
 186  * cache.h there.
 187  */
 188 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 189
 190 #ifdef _WIN32
 191 #include "../compat/mingw.h"
 192 #endif
 193
 194 /* some defines not available on osx */
 195 #ifndef MAX_PATH
 196 #define MAX_PATH PATH_MAX
 197 #endif
 198
 199 #ifndef BOOL
 200 #define BOOL int
 201 #endif
 202
 203 #ifndef TRUE
 204 #define TRUE 1
 205 #endif
 206
 207 #ifndef FALSE
 208 #define FALSE 0
 209 #endif
 210
 211 #ifndef UINT
 212 #define UINT unsigned int
 213 #endif
 214
 215 #ifdef _WIN32
 216 #define PATH_SEPERATOR '\\'
 217 #endif
 218
 219 /* default PATH_SEPERATOR is / */
 220 #ifndef PATH_SEPERATOR
 221 #define PATH_SEPERATOR '/'
 222 #endif
 223
 224 #endif