src/win32/w32_common.h

   1 /*
   2  * Copyright (C) the libgit2 contributors. All rights reserved.
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7
   8 #ifndef INCLUDE_win32_w32_common_h__
   9 #define INCLUDE_win32_w32_common_h__
  10
  11 /*
  12  * Provides a large enough buffer to support Windows paths:  MAX_PATH is
  13  * 260, corresponding to a maximum path length of 259 characters plus a
  14  * NULL terminator.  Prefixing with "\\?\" adds 4 characters, but if the
  15  * original was a UNC path, then we turn "\\server\share" into
  16  * "\\?\UNC\server\share".  So we replace the first two characters with
  17  * 8 characters, a net gain of 6, so the maximum length is MAX_PATH+6.
  18  */
  19 #define GIT_WIN_PATH_UTF16              MAX_PATH+6
  20
  21 /* Maximum size of a UTF-8 Win32 path.  We remove the "\\?\" or "\\?\UNC\"
  22  * prefixes for presentation, bringing us back to 259 (non-NULL)
  23  * characters.  UTF-8 does have 4-byte sequences, but they are encoded in
  24  * UTF-16 using surrogate pairs, which takes up the space of two characters.
  25  * Two characters in the range U+0800 -> U+FFFF take up more space in UTF-8
  26  * (6 bytes) than one surrogate pair (4 bytes).
  27  */
  28 #define GIT_WIN_PATH_UTF8               (259 * 3 + 1)
  29
  30 /*
  31  * The length of a Windows "shortname", for 8.3 compatibility.
  32  */
  33 #define GIT_WIN_PATH_SHORTNAME  13
  34
  35 /* Win32 path types */
  36 typedef wchar_t git_win32_path[GIT_WIN_PATH_UTF16];
  37 typedef char git_win32_utf8_path[GIT_WIN_PATH_UTF8];
  38
  39 #endif