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authorDaniel Wilhelm <daniel@wili.li>2014-04-18 17:15:16 +0200
committerDaniel Wilhelm <daniel@wili.li>2014-04-18 17:15:16 +0200
commitbd6336c629841c6db3a6ca53a936d629d34db53b (patch)
tree3721ef997864108df175ce677a8a7d4342a6f1d2 /shared/long_path_prefix.h
parent4.0 (diff)
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4.1
Diffstat (limited to 'shared/long_path_prefix.h')
-rw-r--r--shared/long_path_prefix.h104
1 files changed, 0 insertions, 104 deletions
diff --git a/shared/long_path_prefix.h b/shared/long_path_prefix.h
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--- a/shared/long_path_prefix.h
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-// **************************************************************************
-// * This file is part of the FreeFileSync project. It is distributed under *
-// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
-// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
-// **************************************************************************
-
-#ifndef LONGPATHPREFIX_H_INCLUDED
-#define LONGPATHPREFIX_H_INCLUDED
-
-#include "zstring.h"
-
-#ifndef FFS_WIN
-#error use in windows build only!
-#endif
-
-namespace zen
-{
-//handle filenames longer-equal 260 (== MAX_PATH) characters by applying \\?\-prefix (Reference: 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!
-3. path may already contain \\?\-prefix
-*/
-Zstring applyLongPathPrefix(const Zstring& path); //throw()
-Zstring applyLongPathPrefixCreateDir(const Zstring& path); //throw() -> special rule for ::CreateDirectoryEx(): MAX_PATH - 12(=^ 8.3 filename) is threshold
-
-Zstring removeLongPathPrefix(const Zstring& path); //throw()
-}
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-//################## implementation ##################
-
-//there are two flavors of long path prefix: one for UNC paths, one for regular paths
-const Zstring LONG_PATH_PREFIX = Zstr("\\\\?\\");
-const Zstring LONG_PATH_PREFIX_UNC = Zstr("\\\\?\\UNC");
-
-template <size_t max_path>
-inline
-Zstring applyLongPathPrefixImpl(const Zstring& path)
-{
- assert(!path.empty()); //nicely check almost all WinAPI accesses!
- if (path.length() >= max_path && //maximum allowed path length without prefix is (MAX_PATH - 1)
- !path.StartsWith(LONG_PATH_PREFIX))
- {
- if (path.StartsWith(Zstr("\\\\"))) //UNC-name, e.g. \\zenju-pc\Users
- return LONG_PATH_PREFIX_UNC + path.AfterFirst(Zchar('\\')); //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) //throw()
-{
- //special rule for ::CreateDirectoryEx(): MAX_PATH - 12(=^ 8.3 filename) is threshold
- return applyLongPathPrefixImpl < MAX_PATH - 12 > (path);
-}
-
-
-inline
-Zstring zen::removeLongPathPrefix(const Zstring& path) //throw()
-{
- if (path.StartsWith(LONG_PATH_PREFIX))
- {
- if (path.StartsWith(LONG_PATH_PREFIX_UNC)) //UNC-name
- return Zstring(path).Replace(LONG_PATH_PREFIX_UNC, Zstr("\\"), false);
- else
- return Zstring(path).Replace(LONG_PATH_PREFIX, Zstr(""), false);
- }
-
- return path; //fallback
-}
-
-#endif //LONGPATHPREFIX_H_INCLUDED
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