/*
 * Copyright (C) Ascensio System SIA, 2009-2026
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation, together with the
 * additional terms provided in the LICENSE file.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
 * details, see the GNU AGPL at: https://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA by email at info@onlyoffice.com
 * or by postal mail at 20A-6 Ernesta Birznieka-Upisha Street, Riga,
 * LV-1050, Latvia, European Union.
 *
 * The interactive user interfaces in modified versions of the Program
 * are required to display Appropriate Legal Notices in accordance with
 * Section 5 of the GNU AGPL version 3.
 *
 * No trademark rights are granted under this License.
 *
 * All non-code elements of the Product, including illustrations,
 * icon sets, and technical writing content, are licensed under the
 * Creative Commons Attribution-ShareAlike 4.0 International License:
 * https://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 * This license applies only to such non-code elements and does not
 * modify or replace the licensing terms applicable to the Program's
 * source code, which remains licensed under the GNU Affero General
 * Public License v3.
 *
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#ifdef __ANDROID__
#include <stdio.h>
char* gcvt(double x, int n, char* b)
{
    sprintf(b, "%.*g", n, x);
    return b;
}
#endif

#include "CommonInclude.h"
#include "Common.h"

#ifndef _gcvt
#include "stdlib.h"
#define _CVTBUFSIZE  128
#define _gcvt gcvt
#endif

#define DBL_MAX 15
#define DBL_MAXDIG10 17

std::wstring OOX::Spreadsheet::SpreadsheetCommon::WriteDouble(double dVal)
{
	//according to http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2005.pdf
	//DBL_MAX = 15 digits, DBL_MAXDIG10 = 17 digits.
	char buffer[_CVTBUFSIZE];
	_gcvt( dVal, DBL_MAXDIG10, buffer );
    std::string sRes(buffer);
    int nLength = sRes.length();
	if(nLength > 0 && '.' == sRes[nLength - 1])
        sRes = sRes.substr(0, nLength - 1);
    return std::wstring(sRes.begin(), sRes.end());
}