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added class Header

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This commit is contained in:
Ivan Morozov
2022-06-03 20:37:35 +03:00
parent b72955c5db
commit e49127b686
9 changed files with 300 additions and 8 deletions
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111
Common/cppcf/header.cpp
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@ -1,9 +1,116 @@
#include "header.h"
#include "cfexception.h"
#include "streamrw.h"
using namespace CFCPP;
Header::Header()
Header::Header() :
Header(3)
{
}
Header::Header(ushort version)
{
switch (version)
{
case 3:
majorVersion = 3;
sectorShift = 0x0009;
break;
case 4:
majorVersion = 4;
sectorShift = 0x000C;
break;
default:
throw new CFException("Invalid Compound File Format version");
}
for (int i = 0; i < 109; i++)
{
difat[i] = Sector::FREESECT;
}
}
void Header::Write(std::fstream &stream)
{
StreamRW rw(stream);
rw.WriteArray(headerSignature.data(), headerSignature.size());
rw.WriteArray(clsid.data(), clsid.size());
rw.Write(minorVersion);
rw.Write(majorVersion);
rw.Write(byteOrder);
rw.Write(sectorShift);
rw.Write(miniSectorShift);
rw.WriteArray(unUsed.data(), unUsed.size());
rw.Write(directorySectorsNumber);
rw.Write(fatSectorsNumber);
rw.Write(firstDirectorySectorID);
rw.Write(unUsed2);
rw.Write(minSizeStandardStream);
rw.Write(firstMiniFATSectorID);
rw.Write(miniFATSectorsNumber);
rw.Write(firstDIFATSectorID);
rw.Write(difatSectorsNumber);
for (int i : difat)
{
rw.Write(i);
}
if (majorVersion == 4)
{
std::vector<BYTE> zeroHead(3584,0);
rw.WriteArray(zeroHead.data(), zeroHead.size());
}
}
void Header::Read(std::fstream &stream)
{
StreamRW rw(stream);
headerSignature = rw.ReadArray<8>();
CheckSignature();
clsid = rw.ReadArray<16>();
minorVersion = rw.Read<decltype(minorVersion)>();
majorVersion = rw.Read<decltype(majorVersion)>();
CheckVersion();
byteOrder = rw.Read<decltype(majorVersion)>();
sectorShift = rw.Read<decltype(majorVersion)>();
miniSectorShift = rw.Read<decltype(majorVersion)>();
unUsed = rw.ReadArray<6>();
directorySectorsNumber = rw.Read<decltype(directorySectorsNumber)>();
fatSectorsNumber = rw.Read<decltype(fatSectorsNumber)>();
firstDirectorySectorID = rw.Read<decltype(firstDirectorySectorID)>();
unUsed2 = rw.Read<decltype(unUsed2)>();
minSizeStandardStream = rw.Read<decltype(minSizeStandardStream)>();
firstMiniFATSectorID = rw.Read<decltype(firstMiniFATSectorID)>();
miniFATSectorsNumber = rw.Read<decltype(miniFATSectorsNumber)>();
firstDIFATSectorID = rw.Read<decltype(firstDIFATSectorID)>();
difatSectorsNumber = rw.Read<decltype(difatSectorsNumber)>();
for (int i = 0; i < 109; i++)
{
difat[i] = rw.Read<int>();
}
}
void Header::CheckVersion() const
{
if (majorVersion != 3 && majorVersion != 4)
throw new CFFileFormatException("Unsupported Binary File Format version: OpenMcdf only supports Compound Files with major version equal to 3 or 4 ");
}
void Header::CheckSignature() const
{
std::array<BYTE,8> OLE_CFS_SIGNATURE{ 0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1 };
for (int i = 0; i < (int)headerSignature.size(); i++)
{
if (headerSignature[i] != OLE_CFS_SIGNATURE[i])
throw new CFFileFormatException("Invalid OLE structured storage file");
}
}