/* -*- 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 "path_helper.hxx"
#include <osl/diagnose.h>
#include <rtl/ustring.hxx>
#include <sal/log.hxx>

#include <algorithm>
#include <wchar.h>

constexpr OUStringLiteral BACKSLASH (u"\\");
constexpr OUStringLiteral SLASH     (u"/");

void osl_systemPathEnsureSeparator(/*inout*/ rtl_uString** ppustrPath)
{
    OSL_PRECOND(ppustrPath && (nullptr != *ppustrPath),
                "osl_systemPathEnsureSeparator: Invalid parameter");

    OUString path(*ppustrPath);
    sal_Int32     i = std::max<sal_Int32>(path.lastIndexOf(BACKSLASH), path.lastIndexOf(SLASH));

    if (i < (path.getLength()-1))
    {
        path += BACKSLASH;
        rtl_uString_assign(ppustrPath, path.pData);
    }

    SAL_WARN_IF( !path.endsWith(BACKSLASH),
                 "sal.osl",
                 "osl_systemPathEnsureSeparator: Post condition failed");
}

void osl_systemPathRemoveSeparator(/*inout*/ rtl_uString** ppustrPath)
{
    OUString path(*ppustrPath);

    if (!osl::systemPathIsLogicalDrivePattern(path))
    {
        sal_Int32 i = std::max<sal_Int32>(path.lastIndexOf(BACKSLASH), path.lastIndexOf(SLASH));

        if (i > -1 && (i == (path.getLength() - 1)))
        {
            path = OUString(path.getStr(), path.getLength() - 1);
            rtl_uString_assign(ppustrPath, path.pData);
        }
    }
}

// is [A-Za-z]:[/|\]\0
const char* const LDP                = ":";
const char* const LDP_WITH_BACKSLASH = ":\\";
const char* const LDP_WITH_SLASH     = ":/";

// degenerated case returned by the Windows FileOpen dialog
// when someone enters for instance "x:filename", the Win32
// API accepts this case
const char* const LDP_WITH_DOT_BACKSLASH = ":.\\";

bool osl_systemPathIsLogicalDrivePattern(/*in*/ const rtl_uString* pustrPath)
{
    const sal_Unicode* p = rtl_uString_getStr(const_cast<rtl_uString*>(pustrPath));
    if (iswalpha(*p++))
    {
        return ((0 == rtl_ustr_ascii_compare(p, LDP)) ||
                (0 == rtl_ustr_ascii_compare(p, LDP_WITH_BACKSLASH)) ||
                (0 == rtl_ustr_ascii_compare(p, LDP_WITH_SLASH)) ||
                (0 == rtl_ustr_ascii_compare(p, LDP_WITH_DOT_BACKSLASH)));
    }
    return false;
}

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