185 lines
4.9 KiB
C++
185 lines
4.9 KiB
C++
/*
|
|
* (c) Copyright Ascensio System SIA 2010-2023
|
|
*
|
|
* 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. In accordance with
|
|
* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
|
|
* that Ascensio System SIA expressly excludes the warranty of non-infringement
|
|
* of any third-party rights.
|
|
*
|
|
* 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: http://www.gnu.org/licenses/agpl-3.0.html
|
|
*
|
|
* You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
|
|
* street, Riga, Latvia, EU, LV-1050.
|
|
*
|
|
* The interactive user interfaces in modified source and object code versions
|
|
* of the Program must display Appropriate Legal Notices, as required under
|
|
* Section 5 of the GNU AGPL version 3.
|
|
*
|
|
* Pursuant to Section 7(b) of the License you must retain the original Product
|
|
* logo when distributing the program. Pursuant to Section 7(e) we decline to
|
|
* grant you any rights under trademark law for use of our trademarks.
|
|
*
|
|
* All the Product's GUI elements, including illustrations and icon sets, as
|
|
* well as technical writing content are licensed under the terms of the
|
|
* Creative Commons Attribution-ShareAlike 4.0 International. See the License
|
|
* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
|
|
*
|
|
*/
|
|
#include "BinaryBiff12StreamReader.h"
|
|
|
|
namespace XLSB
|
|
{
|
|
CBinaryBiff12StreamReader::CBinaryBiff12StreamReader()
|
|
{
|
|
|
|
}
|
|
|
|
DWORD CBinaryBiff12StreamReader::CBinaryBiff12StreamReader::GetDword(LPBYTE p)
|
|
{
|
|
return *(DWORD*)p;
|
|
}
|
|
|
|
WORD CBinaryBiff12StreamReader::GetWord(LPBYTE p)
|
|
{
|
|
return *(WORD*)p;
|
|
}
|
|
|
|
BYTE CBinaryBiff12StreamReader::GetByte(LPBYTE p)
|
|
{
|
|
return *(BYTE*)p;
|
|
}
|
|
|
|
double CBinaryBiff12StreamReader::GetFloat(LPBYTE p)
|
|
{
|
|
|
|
// When it's a simple precision float, Excel uses a special
|
|
// encoding
|
|
long rk = *(long*)p;
|
|
double d = 0;
|
|
if (rk & 0x02)
|
|
{
|
|
// int
|
|
d = (double) (rk >> 2);
|
|
}
|
|
else
|
|
{
|
|
// hi words of IEEE num
|
|
*((long *)&d+1) = rk & 0xfffffffc;
|
|
*((long *)&d) = 0;
|
|
}
|
|
if (rk & 0x01)
|
|
{
|
|
// divide by 100
|
|
d /= 100;
|
|
}
|
|
|
|
return d;
|
|
}
|
|
|
|
double CBinaryBiff12StreamReader::GetDouble(LPBYTE p)
|
|
{
|
|
return *(double*)p;
|
|
}
|
|
|
|
std::wstring CBinaryBiff12StreamReader::GetString(LPBYTE p, int len)
|
|
{
|
|
|
|
LONG lIndex = 0;
|
|
std::wstring res;
|
|
len *= 2;
|
|
while (lIndex < len)
|
|
{
|
|
res.push_back((uint16_t)(p[lIndex]) | ((uint16_t)p[lIndex + 1] << 8));
|
|
lIndex+=2;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
bool CBinaryBiff12StreamReader::GetRecordId(LPBYTE& p, LPBYTE p_last, /*out*/DWORD& recid)
|
|
{
|
|
recid = 0;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b1 = *(BYTE*)(p++);
|
|
recid = DWORD(b1);
|
|
|
|
if ((b1 & 0x80) == 0)
|
|
return true;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b2 = *(BYTE*)(p++);
|
|
recid = (DWORD(b2) << 8) | recid;
|
|
|
|
if ((b2 & 0x80) == 0)
|
|
return true;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b3 = *(BYTE*)(p++);
|
|
recid = (DWORD(b3) << 16) | recid;
|
|
|
|
if ((b3 & 0x80) == 0)
|
|
return true;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b4 = *(BYTE*)(p++);
|
|
recid = (DWORD(b4) << 24) | recid;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CBinaryBiff12StreamReader::GetRecordLength(LPBYTE& p, LPBYTE p_last, /*out*/DWORD& reclen)
|
|
{
|
|
reclen = 0;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b1 = *(BYTE*)(p++);
|
|
reclen = DWORD(b1 & 0x7F);
|
|
|
|
if ((b1 & 0x80) == 0)
|
|
return true;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b2 = *(BYTE*)(p++);
|
|
reclen = (DWORD(b2 & 0x7F) << 7) | reclen;
|
|
|
|
if ((b2 & 0x80) == 0)
|
|
return true;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b3 = *(BYTE*)(p++);
|
|
reclen = (DWORD(b3 & 0x7F) << 14) | reclen;
|
|
|
|
if ((b3 & 0x80) == 0)
|
|
return true;
|
|
|
|
if (!p || p > p_last)
|
|
return false;
|
|
BYTE b4 = *(BYTE*)(p++);
|
|
reclen = (DWORD(b4 & 0x7F) << 21) | reclen;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CBinaryBiff12StreamReader::GetBit(unsigned char byte, int position) // position in range 0-7
|
|
{
|
|
return (byte >> position) & 0x1;
|
|
}
|
|
|
|
DWORD CBinaryBiff12StreamReader::GetBits(unsigned x,int p,int n)
|
|
{
|
|
return (x >> (p+1-n)) & ~(~0 << n);
|
|
}
|
|
}
|