Kadal Pura was set in the period of Virarajendra....Karunagaran was a youngster and went back to kalingam to destroy it as potrayed in kalingathuparani... Even Kulothunga is a prince in this story.... this is about virarajendras kadaram invasion
Kalingathuparani follws this when kulothunga becomes king and karunagaran is his chief commander