IFFRESULT IFFParser::IFFDescendChunk(IFFCHUNK* lpck)
{
lpck->flags = 0; // Read
ULONG len = IFFReadChunkBytes(lpck, IFFCHUNKSIZE);
if (len == 0)
return IFF_EOF;
else if (len != IFFCHUNKSIZE)
return IFFERR_READWRITE;
lpck->ckID = BigEndian32(lpck->ckID);
lpck->ckSize = BigEndian32(lpck->ckSize);
lpck->dataOffset = SetFilePos(0, IO::STREAM_SEEK_CUR);
lpck->grpID = 0;
if (lpck->ckID == ID_FORM)
{
if (IFFReadChunkBytes(&lpck->grpID, sizeof(ID)) != sizeof(ID))
return IFFERR_READWRITE;
lpck->grpID = BigEndian32(lpck->grpID);
return IFF_EOC;
}
return IFF_OK;
}
uint8_t
StringExtractorGDBRemote::GetError ()
{
if (GetResponseType() == eError)
{
SetFilePos(1);
return GetHexU8(255);
}
return 0;
}
IFFRESULT IFFParser::IFFAscendChunk(IFFCHUNK* lpck)
{
ULONGLONG pos;
pos = SetFilePos(0, IO::STREAM_SEEK_CUR); // Current position
if (lpck->flags == 0)
{
int32 offset = lpck->ckSize-(pos-lpck->dataOffset);
if (lpck->ckSize & 1) offset++; // Word-aligned chunks
/*if (*/SetFilePos(offset, IO::STREAM_SEEK_CUR);// == 0xffffffff)
/*
return IFFERR_READWRITE;
else
return IFF_OK;
*/
}
else
{
uint32 cksize = pos - lpck->dataOffset;
if (lpck->ckSize == 0) // Unknown size data at time of chunk creation
{
lpck->ckSize = cksize;
cksize = BigEndian32(cksize);
SetFilePos(lpck->dataOffset-4, IO::STREAM_SEEK_SET);
IFFWriteChunkBytes(&cksize, 4); // Write the chunk length
SetFilePos(pos, IO::STREAM_SEEK_SET);
}
if (cksize & 1)
{
uint8 padbyte = 0;
IFFWriteChunkBytes(&padbyte, 1);
}
}
return IFF_OK;
}
LONG IFFParser::IFFCreateChunk(IFFCHUNK* lpck)
{
lpck->flags = 1; // Created
IFFCHUNK ck;
ck.ckID = BigEndian32(lpck->ckID);
ck.ckSize = BigEndian32(lpck->ckSize);
m_stream->Write(&ck, IFFCHUNKSIZE);
lpck->dataOffset = SetFilePos(0, IO::STREAM_SEEK_CUR);
if (lpck->ckID == ID_FORM)
{
ULONG grpID = BigEndian32(lpck->grpID);
m_stream->Write(&grpID, 4);
}
return IFF_OK;
}
