void ZipLocalFileHeader::parse(std::istream& inp, bool assumeHeaderRead)
{
if (!assumeHeaderRead)
{
inp.read(_rawHeader, ZipCommon::HEADER_SIZE);
}
else
{
std::memcpy(_rawHeader, HEADER, ZipCommon::HEADER_SIZE);
}
poco_assert (std::memcmp(_rawHeader, HEADER, ZipCommon::HEADER_SIZE) == 0);
// read the rest of the header
inp.read(_rawHeader + ZipCommon::HEADER_SIZE, FULLHEADER_SIZE - ZipCommon::HEADER_SIZE);
poco_assert (_rawHeader[VERSION_POS + 1]>= ZipCommon::HS_FAT && _rawHeader[VERSION_POS + 1] < ZipCommon::HS_UNUSED);
poco_assert (getMajorVersionNumber() <= 2);
poco_assert (ZipUtil::get16BitValue(_rawHeader, COMPR_METHOD_POS) < ZipCommon::CM_UNUSED);
parseDateTime();
Poco::UInt16 len = getFileNameLength();
Poco::Buffer<char> buf(len);
inp.read(buf.begin(), len);
_fileName = std::string(buf.begin(), len);
if (hasExtraField())
{
len = getExtraFieldLength();
Poco::Buffer<char> xtra(len);
inp.read(xtra.begin(), len);
_extraField = std::string(xtra.begin(), len);
}
if (!searchCRCAndSizesAfterData())
{
_crc32 = getCRCFromHeader();
_compressedSize = getCompressedSizeFromHeader();
_uncompressedSize = getUncompressedSizeFromHeader();
}
}
void ZipLocalFileHeader::parse(std::istream& inp, bool assumeHeaderRead)
{
if (!assumeHeaderRead)
{
inp.read(_rawHeader, ZipCommon::HEADER_SIZE);
}
else
{
std::memcpy(_rawHeader, HEADER, ZipCommon::HEADER_SIZE);
}
poco_assert (std::memcmp(_rawHeader, HEADER, ZipCommon::HEADER_SIZE) == 0);
// read the rest of the header
inp.read(_rawHeader + ZipCommon::HEADER_SIZE, FULLHEADER_SIZE - ZipCommon::HEADER_SIZE);
poco_assert (_rawHeader[VERSION_POS + 1]>= ZipCommon::HS_FAT && _rawHeader[VERSION_POS + 1] < ZipCommon::HS_UNUSED);
poco_assert (getMajorVersionNumber() <= 4); // Allow for Zip64 version 4.5
poco_assert (ZipUtil::get16BitValue(_rawHeader, COMPR_METHOD_POS) < ZipCommon::CM_UNUSED);
parseDateTime();
Poco::UInt16 len = getFileNameLength();
Poco::Buffer<char> buf(len);
inp.read(buf.begin(), len);
_fileName = std::string(buf.begin(), len);
if (!searchCRCAndSizesAfterData())
{
_crc32 = getCRCFromHeader();
_compressedSize = getCompressedSizeFromHeader();
_uncompressedSize = getUncompressedSizeFromHeader();
}
if (hasExtraField())
{
len = getExtraFieldLength();
Poco::Buffer<char> xtra(len);
inp.read(xtra.begin(), len);
_extraField = std::string(xtra.begin(), len);
char* ptr = xtra.begin();
while (ptr <= xtra.begin() + len - 4)
{
Poco::UInt16 id = ZipUtil::get16BitValue(ptr, 0); ptr +=2;
Poco::UInt16 size = ZipUtil::get16BitValue(ptr, 0); ptr += 2;
if (id == ZipCommon::ZIP64_EXTRA_ID)
{
poco_assert(size >= 8);
if (getUncompressedSizeFromHeader() == ZipCommon::ZIP64_MAGIC)
{
setUncompressedSize(ZipUtil::get64BitValue(ptr, 0)); size -= 8; ptr += 8;
}
if (size >= 8 && getCompressedSizeFromHeader() == ZipCommon::ZIP64_MAGIC)
{
setCompressedSize(ZipUtil::get64BitValue(ptr, 0)); size -= 8; ptr += 8;
}
}
else
{
ptr += size;
}
}
}
}