void ChunkedFile::parseChunks()
{
uint8* ptr = GetData();
// Make sure there's enough data to read u_map_fcc struct and the uint32 size after it
while (ptr <= GetData() + GetDataSize() - 8)
{
u_map_fcc header = *(u_map_fcc*)ptr;
if (IsInterestingChunk(header))
{
uint32 size = *(uint32*)(ptr + 4);
if (size <= data_size)
{
std::swap(header.fcc_txt[0], header.fcc_txt[3]);
std::swap(header.fcc_txt[1], header.fcc_txt[2]);
FileChunk* chunk = new FileChunk(ptr, size);
chunk->parseSubChunks();
chunks.insert({ std::string(header.fcc_txt, 4), chunk });
}
// move to next chunk
ptr += size + 8;
}
else
++ptr;
}
}
void FileChunk::parseSubChunks()
{
uint8* ptr = data + 8; // skip self
while (ptr < data + size)
{
u_map_fcc header = *(u_map_fcc*)ptr;
if (IsInterestingChunk(header))
{
uint32 subsize = *(uint32*)(ptr + 4);
if (subsize < size)
{
std::swap(header.fcc_txt[0], header.fcc_txt[3]);
std::swap(header.fcc_txt[1], header.fcc_txt[2]);
FileChunk* chunk = new FileChunk(ptr, subsize);
chunk->parseSubChunks();
subchunks.insert({ std::string(header.fcc_txt, 4), chunk });
}
// move to next chunk
ptr += subsize + 8;
}
else
++ptr;
}
}
void ChunkedFile::parseChunks()
{
uint8* ptr = GetData();
while (ptr < GetData() + GetDataSize())
{
u_map_fcc header = *(u_map_fcc*)ptr;
uint32 size = 0;
if (IsInterestingChunk(header))
{
size = *(uint32*)(ptr + 4);
if (size <= data_size)
{
std::swap(header.fcc_txt[0], header.fcc_txt[3]);
std::swap(header.fcc_txt[1], header.fcc_txt[2]);
FileChunk* chunk = new FileChunk{ ptr, size };
chunk->parseSubChunks();
chunks.insert({ std::string(header.fcc_txt, 4), chunk });
}
}
// move to next chunk
ptr += size + 8;
}
}
