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Diffstat (limited to 'zen/long_path_prefix.h')
| -rw-r--r-- | zen/long_path_prefix.h | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/zen/long_path_prefix.h b/zen/long_path_prefix.h deleted file mode 100644 index ef8e5dc8..00000000 --- a/zen/long_path_prefix.h +++ /dev/null @@ -1,134 +0,0 @@ -// ************************************************************************** -// * This file is part of the FreeFileSync project. It is distributed under * -// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 * -// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved * -// ************************************************************************** - -#ifndef LONG_PATH_PREFIX_H_3984678473567247567 -#define LONG_PATH_PREFIX_H_3984678473567247567 - -#include "win.h" -#include "zstring.h" - - -namespace zen -{ -//handle filepaths longer-equal 260 (== MAX_PATH) characters by applying \\?\-prefix; see: http://msdn.microsoft.com/en-us/library/aa365247(VS.85).aspx#maxpath -/* -1. path must be absolute -2. if path is smaller than MAX_PATH nothing is changed! caveat: FindFirstFile() "Prepending the string "\\?\" does not allow access to the root directory." -3. path may already contain \\?\-prefix -*/ -Zstring applyLongPathPrefix(const Zstring& path); //noexcept -Zstring applyLongPathPrefixCreateDir(const Zstring& path); //noexcept -> special rule for ::CreateDirectory()/::CreateDirectoryEx(): MAX_PATH - 12(=^ 8.3 filepath) is threshold - -Zstring removeLongPathPrefix(const Zstring& path); //noexcept - - -Zstring ntPathToWin32Path(const Zstring& path); //noexcept -/* -http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx#NT_Namespaces - -As used by GetModuleFileNameEx() and symlinks (FSCTL_GET_REPARSE_POINT): - E.g.: - \??\C:\folder -> C:\folder - \SystemRoot -> C:\Windows -*/ -} - - - - - - - - - - - - - -//################## implementation ################## - -//there are two flavors of long path prefix: one for UNC paths, one for regular paths -const wchar_t LONG_PATH_PREFIX [] = L"\\\\?\\"; //don't use Zstring as global constant: avoid static initialization order problem in global namespace! -const wchar_t LONG_PATH_PREFIX_UNC[] = L"\\\\?\\UNC"; // - -template <size_t maxPath> inline -Zstring applyLongPathPrefixImpl(const Zstring& path) -{ - assert(!path.empty()); //nicely check almost all WinAPI accesses! - assert(!zen::isWhiteSpace(path[0])); - - //http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx#naming_conventions - /* - - special names like ".NUL" create all kinds of trouble (e.g. CreateDirectory() reports success, but does nothing) - unless prefix is supplied => accept as limitation - */ - if (path.length() >= maxPath || //maximum allowed path length without prefix is (MAX_PATH - 1) - endsWith(path, L' ') || //by default all Win32 APIs trim trailing spaces and period, unless long path prefix is supplied! - endsWith(path, L'.')) //note: adding long path prefix might screw up relative paths "." and ".."! - if (!startsWith(path, LONG_PATH_PREFIX)) - { - if (startsWith(path, L"\\\\")) //UNC-name, e.g. \\zenju-pc\Users - return LONG_PATH_PREFIX_UNC + afterFirst(path, L'\\', zen::IF_MISSING_RETURN_NONE); //convert to \\?\UNC\zenju-pc\Users - else - return LONG_PATH_PREFIX + path; //prepend \\?\ prefix - } - return path; //fallback -} - - -inline -Zstring zen::applyLongPathPrefix(const Zstring& path) -{ - return applyLongPathPrefixImpl<MAX_PATH>(path); -} - - -inline -Zstring zen::applyLongPathPrefixCreateDir(const Zstring& path) //noexcept -{ - //special rule for ::CreateDirectoryEx(): MAX_PATH - 12(=^ 8.3 filepath) is threshold - return applyLongPathPrefixImpl<MAX_PATH - 12> (path); -} - - -inline -Zstring zen::removeLongPathPrefix(const Zstring& path) //noexcept -{ - if (zen::startsWith(path, LONG_PATH_PREFIX)) - { - if (zen::startsWith(path, LONG_PATH_PREFIX_UNC)) //UNC-name - return replaceCpy(path, LONG_PATH_PREFIX_UNC, Zstr("\\"), false); - else - return replaceCpy(path, LONG_PATH_PREFIX, Zstr(""), false); - } - return path; //fallback -} - - -inline -Zstring zen::ntPathToWin32Path(const Zstring& path) //noexcept -{ - if (startsWith(path, L"\\??\\")) - return Zstring(path.c_str() + 4, path.length() - 4); - - if (startsWith(path, L"\\SystemRoot\\")) - { - DWORD bufSize = ::GetEnvironmentVariable(L"SystemRoot", nullptr, 0); - if (bufSize > 0) - { - std::vector<wchar_t> buf(bufSize); - const DWORD charsWritten = ::GetEnvironmentVariable(L"SystemRoot", //_In_opt_ LPCTSTR lpName, - &buf[0], //_Out_opt_ LPTSTR lpBuffer, - bufSize); //_In_ DWORD nSize - if (0 < charsWritten && charsWritten < bufSize) - return replaceCpy(path, L"\\SystemRoot\\", appendSeparator(Zstring(&buf[0], charsWritten)), false); - } - } - - return path; -} - -#endif //LONG_PATH_PREFIX_H_3984678473567247567 |