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/* -*- 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: */
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