forked from amazingfate/loongoffice
b66c5f77d1
Change-Id: I69cc1b352221ca053ccd0c5b78e926480a8c9ccd Reviewed-on: https://gerrit.libreoffice.org/c/core/+/87884 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#if defined(_WIN32)
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <o3tl/safeint.hxx>
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#include <sal/types.h>
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#include <tools/pathutils.hxx>
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namespace tools {
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WCHAR * filename(WCHAR * path) {
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WCHAR * f = path;
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for (WCHAR * p = path;;) {
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switch (*p++) {
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case L'\0':
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return f;
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case L'\\':
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f = p;
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break;
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}
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}
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}
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WCHAR * buildPath(
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WCHAR * path, WCHAR const * frontBegin, WCHAR const * frontEnd,
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WCHAR const * backBegin, std::size_t backLength)
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{
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// Remove leading ".." segments in the second path together with matching
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// segments in the first path that are neither empty nor "." nor ".." nor
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// end in ":" (which is not foolproof, as it can erroneously erase the start
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// of a UNC path, but only if the input is bad data):
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while (backLength >= 2 && backBegin[0] == L'.' && backBegin[1] == L'.' &&
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(backLength == 2 || backBegin[2] == L'\\'))
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{
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if (frontEnd - frontBegin < 2 || frontEnd[-1] != L'\\' ||
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frontEnd[-2] == L'\\' || frontEnd[-2] == L':' ||
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(frontEnd[-2] == L'.' &&
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(frontEnd - frontBegin < 3 || frontEnd[-3] == L'\\' ||
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(frontEnd[-3] == L'.' &&
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(frontEnd - frontBegin < 4 || frontEnd[-4] == L'\\')))))
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{
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break;
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}
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WCHAR const * p = frontEnd - 1;
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while (p != frontBegin && p[-1] != L'\\') {
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--p;
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}
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if (p == frontBegin) {
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break;
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}
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frontEnd = p;
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if (backLength == 2) {
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backBegin += 2;
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backLength -= 2;
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} else {
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backBegin += 3;
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backLength -= 3;
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}
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}
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if (backLength <
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o3tl::make_unsigned(MAX_PATH - (frontEnd - frontBegin)))
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{
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WCHAR * p;
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if (frontBegin == path) {
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p = const_cast< WCHAR * >(frontEnd);
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} else {
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p = path;
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while (frontBegin != frontEnd) {
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*p++ = *frontBegin++;
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}
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}
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for (; backLength > 0; --backLength) {
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*p++ = *backBegin++;
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}
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*p = L'\0';
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return p;
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} else {
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SetLastError(ERROR_FILENAME_EXCED_RANGE);
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return nullptr;
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}
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}
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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