how to implemnt JSON simple parser in c++ ( can't use external libs )

Hi one of my clients want to implement JSON parser and reader in c++ he doesn't want to adopt third party lib. so i like to know where i can find simple implementation of JSON parser so i could adjust it or implement it in c++ Thanks

From stackoverflow

• Take a look at jsoncpp, it's opensource so you can "adjust" it to your needs.

  : its great public license , so i can just use it as i like