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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /tools/source/misc/pathutils.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-upstream.tar.xz libreoffice-upstream.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/source/misc/pathutils.cxx')
-rw-r--r-- | tools/source/misc/pathutils.cxx | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/tools/source/misc/pathutils.cxx b/tools/source/misc/pathutils.cxx new file mode 100644 index 000000000..706740a32 --- /dev/null +++ b/tools/source/misc/pathutils.cxx @@ -0,0 +1,109 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <sal/config.h> + +#if defined(_WIN32) + +#define WIN32_LEAN_AND_MEAN +#include <windows.h> + +#include <o3tl/safeint.hxx> +#include <sal/types.h> +#include <tools/pathutils.hxx> + +namespace tools { + +WCHAR * filename(WCHAR * path) { + WCHAR * f = path; + for (WCHAR * p = path;;) { + switch (*p++) { + case L'\0': + return f; + case L'\\': + f = p; + break; + } + } +} + +WCHAR * buildPath( + WCHAR * path, WCHAR const * frontBegin, WCHAR const * frontEnd, + WCHAR const * backBegin, std::size_t backLength) +{ + // Remove leading ".." segments in the second path together with matching + // segments in the first path that are neither empty nor "." nor ".." nor + // end in ":" (which is not foolproof, as it can erroneously erase the start + // of a UNC path, but only if the input is bad data): + while (backLength >= 2 && backBegin[0] == L'.' && backBegin[1] == L'.' && + (backLength == 2 || backBegin[2] == L'\\')) + { + if (frontEnd - frontBegin < 2 || frontEnd[-1] != L'\\' || + frontEnd[-2] == L'\\' || frontEnd[-2] == L':' || + (frontEnd[-2] == L'.' && + (frontEnd - frontBegin < 3 || frontEnd[-3] == L'\\' || + (frontEnd[-3] == L'.' && + (frontEnd - frontBegin < 4 || frontEnd[-4] == L'\\'))))) + { + break; + } + WCHAR const * p = frontEnd - 1; + while (p != frontBegin && p[-1] != L'\\') { + --p; + } + if (p == frontBegin) { + break; + } + frontEnd = p; + if (backLength == 2) { + backBegin += 2; + backLength -= 2; + } else { + backBegin += 3; + backLength -= 3; + } + } + if (backLength < + o3tl::make_unsigned(MAX_PATH - (frontEnd - frontBegin))) + { + WCHAR * p; + if (frontBegin == path) { + p = const_cast< WCHAR * >(frontEnd); + } else { + p = path; + while (frontBegin != frontEnd) { + *p++ = *frontBegin++; + } + } + for (; backLength > 0; --backLength) { + *p++ = *backBegin++; + } + *p = L'\0'; + return p; + } else { + SetLastError(ERROR_FILENAME_EXCED_RANGE); + return nullptr; + } +} + +} + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |