APNS : How to generate JSON payload in C

For the communication program with APNS, you have many implementation choices, either php, perl, python, ruby or even C#. You may wonder why the sample of raw interface given by Apple is a C function. static bool sendPayload(SSL *sslPtr, char *deviceTokenBinary, char *payloadBuff, size_t payloadLength) Would there be many implementations that use C /C++ or Objective C ? I guess the number will be