#include "NetworkPacket.hh"


NetworkPacket::NetworkPacket (void) :
    size(NETWORK_PACKET_SIZE), offset(0) {
    
    // nothing
}

template <typename T> T NetworkPacket::read_val (void) {
    T val;

    // check size
    if (offset + sizeof(T) > size)
        throw CL_Error("not enough data to read");
    
    // set value
    val = *((T*) (buf + offset));

    // update offset
    offset += sizeof(T);

    // return
    return val;
}

template <typename T> void NetworkPacket::write_val (const T &val) {
    // check max size
    if (offset + sizeof(T) > NETWORK_PACKET_SIZE)
        throw CL_Error("not enough space to write");
    
    // set value
    *((T*) (buf + offset)) = val;

    // update offset and size
    offset += sizeof(T);
    size += sizeof(T);
}

uint32_t NetworkPacket::read_uint32 (void) {
    return ntohl(read_val<uint32_t>());
}

uint16_t NetworkPacket::read_uint16 (void) {
    return ntohs(read_val<uint16_t>());
}

uint8_t NetworkPacket::read_uint8 (void) {
    return read_val<uint8_t>();
}

int32_t NetworkPacket::read_int32 (void) {
    return ntohl(read_val<int32_t>());
}

int16_t NetworkPacket::read_int16 (void) {
    return ntohs(read_val<int16_t>());
}

int8_t NetworkPacket::read_int8 (void) {
    return read_val<int8_t>();
}

void NetworkPacket::write_uint32 (uint32_t val) {
    write_val<uint32_t>(htonl(val));
}

void NetworkPacket::write_uint16 (uint16_t val) {
    write_val<uint16_t>(htons(val));
}

void NetworkPacket::write_uint8 (uint8_t val) {
    write_val<uint8_t>(val);
}

void NetworkPacket::write_int32 (int32_t val) {
    write_val<int32_t>(htonl(val));
}

void NetworkPacket::write_int16 (int16_t val) {
    write_val<int16_t>(htons(val));
}

void NetworkPacket::write_int8 (int8_t val) {
    write_val<int8_t>(val);
}