October 01, 2005
Bitstream Parsing in C++
Listing 2
class Mgt : public Composite {
public:
Mgt() :
Composite("Mgt")
{
Add(new Bitset("tableId", 8));
Add(new Bitset("sectionSyntaxIndicator", 1));
Add(new Bitset("privateIndicator", 1));
Add(new Bitset("reserved2a", 2));
Add(new Bitset("sectionLength", 12));
Add(new Bitset("tableIdExtention", 16));
Add(new Bitset("reserved2b", 2));
Add(new Bitset("versionNumber", 5));
Add(new Bitset("currentNextIndicator", 1));
Add(new Bitset("sectionNumber", 8));
Add(new Bitset("lastSectionNumber", 8));
Add(new Bitset("protocolVersion", 8));
Add(new Bitset("tablesDefined", 16));
Add(new List ("tables", LIST_INFO(MgtDefinedTable,
Mgt, KeepReadingTables)));
Add(new Bitset("reserved4", 4));
Add(new Bitset("descriptorsLength", 12));
Add(new List ("descriptors",
LIST_INFO(SIDescriptor, Mgt, KeepReadingDescriptors)));
Add(new Bitset("crc", 32));
}
private:
bool KeepReadingTables() {
return Value("tables") < Value("tablesDefined");
}
bool KeepReadingDescriptors() {
return SizeInBytes("descriptors") < Value("descriptorsLength");
}
};
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