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 <stdlib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <fcntl.h>
  35 #include <stdarg.h>
  36 #include <errno.h>
  37 #include <limits.h>
  38 #include <time.h>
  39 #include <signal.h>
  40 #include <sys/stat.h>
  41 #ifdef _WIN32
  42 #include <io.h>
  43 #include <sys/utime.h>
  44 #include <process.h>
  45 #else
  46 #include <unistd.h>
  47 #include <sys/time.h>
  48 #endif /* _WIN32 */
  49
  50 #if defined(_MSC_VER)
  51 /* MSVC defines mkdir here, not in io.h */
  52 #include <direct.h>
  53 #endif
  54
  55 #ifndef PATH_MAX
  56 /*
  57  * with MSVC, if we define _POSIX_ we loose half of useful functions
  58  * (e.g. chmod, open, close), otherwise we don't have PATH_MAX
  59  * because of #ifdef in <io.h>.
  60  * So, when build under MSVC, don't define _POSIX_
  61  */
  62 #define PATH_MAX            512
  63 #endif
  64
  65 #ifdef _WIN32
  66 #ifdef _SSIZE_T_DEFINED
  67 #define _SSIZE_T_
  68 #endif
  69
  70 /* from mingw/include/sys/types.h */
  71 #ifndef _SSIZE_T_
  72 #define _SSIZE_T_
  73 typedef long _ssize_t;
  74
  75 #ifndef _NO_OLDNAMES
  76 typedef _ssize_t ssize_t;
  77 #endif
  78 #endif /* Not _SSIZE_T_ */
  79 #ifndef _MODE_T_
  80 #define _MODE_T_
  81 typedef unsigned short _mode_t;
  82
  83 #ifndef _NO_OLDNAMES
  84 typedef _mode_t mode_t;
  85 #endif
  86 #endif  /* Not _MODE_T_ */
  87
  88
  89 /* from mingw/include/io.h */
  90 /* Some defines for _access nAccessMode (MS doesn't define them, but
  91  * it doesn't seem to hurt to add them). */
  92 #define F_OK    0       /* Check for file existence */
  93 /* Well maybe it does hurt.  On newer versions of MSVCRT, an access mode
  94    of 1 causes invalid parameter error. */
  95 #define X_OK    1       /* MS access() doesn't check for execute permission. */
  96 #define W_OK    2       /* Check for write permission */
  97 #define R_OK    4       /* Check for read permission */
  98 #endif /* _WIN32 */
  99
 100 /* from mingw/include/string.h */
 101 #define strcasecmp(__sz1, __sz2) (_stricmp((__sz1), (__sz2)))
 102
 103 /* from mingw/include/stdint.h */
 104 typedef unsigned   uint32_t;
 105
 106 #ifdef __GNUC__
 107 #define NORETURN __attribute__((__noreturn__))
 108 #else
 109
 110 #if defined(_MSC_VER)
 111 #define NORETURN __declspec(noreturn)
 112 #else
 113 #define NORETURN
 114 #endif /* _MSC_VER */
 115
 116 #ifndef __attribute__
 117 #define __attribute__(x)
 118 #endif
 119 #define __CRT_INLINE
 120 #endif
 121
 122 extern int error(const char * format, ...);
 123 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 124
 125 #ifndef HAVE_STRCHRNUL
 126 #define strchrnul gitstrchrnul
 127 static inline char *gitstrchrnul(const char *s, int c)
 128 {
 129         while (*s && *s != c)
 130                 s++;
 131         return (char *)s;
 132 }
 133 #endif
 134
 135 extern time_t tm_to_time_t(const struct tm *tm);
 136
 137 extern void release_pack_memory(size_t, int);
 138
 139 extern char *xstrdup(const char *str);
 140 extern void *xmalloc(size_t size);
 141 extern void *xrealloc(void *ptr, size_t size);
 142 extern void *xcalloc(size_t nmemb, size_t size);
 143 extern ssize_t xread(int fd, void *buf, size_t len);
 144
 145 #ifdef NO_STRLCPY
 146 #define strlcpy gitstrlcpy
 147 extern size_t gitstrlcpy(char *, const char *, size_t);
 148 #endif
 149
 150 #ifdef _WIN32
 151 #define snprintf _snprintf
 152 #endif
 153
 154 #ifdef NO_MMAP
 155
 156 #ifndef PROT_READ
 157 #define PROT_READ 1
 158 #define PROT_WRITE 2
 159 #define MAP_PRIVATE 1
 160 #define MAP_FAILED ((void*)-1)
 161 #endif
 162
 163 #define mmap git_mmap
 164 #define munmap git_munmap
 165 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 166 extern int git_munmap(void *start, size_t length);
 167
 168 /* This value must be multiple of (pagesize * 2) */
 169 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 170
 171 #else /* NO_MMAP */
 172
 173 #include <sys/mman.h>
 174
 175 /* This value must be multiple of (pagesize * 2) */
 176 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 177         (sizeof(void*) >= 8 \
 178                 ?  1 * 1024 * 1024 * 1024 \
 179                 : 32 * 1024 * 1024)
 180
 181 #endif /* NO_MMAP */
 182
 183 #ifdef NO_PREAD
 184 #define pread git_pread
 185 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 186 #endif
 187 /*
 188  * Forward decl that will remind us if its twin in cache.h changes.
 189  * This function is used in compat/pread.c.  But we can't include
 190  * cache.h there.
 191  */
 192 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 193
 194 #ifdef _WIN32
 195 #include "../compat/mingw.h"
 196 #endif
 197
 198 /* some defines not available on osx */
 199 #ifndef MAX_PATH
 200 #define MAX_PATH PATH_MAX
 201 #endif
 202
 203 #ifndef BOOL
 204 #define BOOL int
 205 #endif
 206
 207 #ifndef TRUE
 208 #define TRUE 1
 209 #endif
 210
 211 #ifndef FALSE
 212 #define FALSE 0
 213 #endif
 214
 215 #ifndef UINT
 216 #define UINT unsigned int
 217 #endif
 218
 219 #ifdef _WIN32
 220 #define PATH_SEPERATOR '\\'
 221 #endif
 222
 223 /* default PATH_SEPERATOR is / */
 224 #ifndef PATH_SEPERATOR
 225 #define PATH_SEPERATOR '/'
 226 #endif
 227
 228 #endif