thodg/libgit2/src/util/win32/w32_common.h

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• Hash : c3b7ace9
  Author :
  Date : 2021-11-14T16:43:53
  

  refactor: make util an object library Instead of simply including the utility files directly, make them a cmake object library for easy reusability between other projects within libgit2. Now the top-level `src` is responsible for platform selection, while the next-level `libgit2` and `util` configurations are responsible for identifying what objects they include.

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• src/util/win32/w32_common.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #ifndef INCLUDE_win32_w32_common_h__
  #define INCLUDE_win32_w32_common_h__
  
  #include <git2/common.h>
  
  /*
   * 4096 is the max allowed Git path. `MAX_PATH` (260) is the typical max allowed
   * Windows path length, however win32 Unicode APIs generally allow up to 32,767
   * if prefixed with "\\?\" (i.e. converted to an NT-style name).
   */
  #define GIT_WIN_PATH_MAX GIT_PATH_MAX
  
  /*
   * Provides a large enough buffer to support Windows Git paths:
   * GIT_WIN_PATH_MAX is 4096, corresponding to a maximum path length of 4095
   * characters plus a NULL terminator.  Prefixing with "\\?\" adds 4 characters,
   * but if the original was a UNC path, then we turn "\\server\share" into
   * "\\?\UNC\server\share".  So we replace the first two characters with
   * 8 characters, a net gain of 6, so the maximum length is GIT_WIN_PATH_MAX+6.
   */
  #define GIT_WIN_PATH_UTF16		GIT_WIN_PATH_MAX+6
  
  /* Maximum size of a UTF-8 Win32 Git path.  We remove the "\\?\" or "\\?\UNC\"
   * prefixes for presentation, bringing us back to 4095 (non-NULL)
   * characters.  UTF-8 does have 4-byte sequences, but they are encoded in
   * UTF-16 using surrogate pairs, which takes up the space of two characters.
   * Two characters in the range U+0800 -> U+FFFF take up more space in UTF-8
   * (6 bytes) than one surrogate pair (4 bytes).
   */
  #define GIT_WIN_PATH_UTF8		((GIT_WIN_PATH_MAX - 1) * 3 + 1)
  
  /*
   * The length of a Windows "shortname", for 8.3 compatibility.
   */
  #define GIT_WIN_PATH_SHORTNAME  13
  
  /* Win32 path types */
  typedef wchar_t git_win32_path[GIT_WIN_PATH_UTF16];
  typedef char git_win32_utf8_path[GIT_WIN_PATH_UTF8];
  
  #endif
  

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