that's not a prototype anymore... at least it shouldn't be
#include <cassert>
#include <cstring>
#include "NetworkPacket.hh"
NetworkPacket::NetworkPacket (void) :
buf_size(NETWORK_PACKET_SIZE), data_size(0), offset(0) {
// nothing
}
void NetworkPacket::check_write_size (size_t item_size) {
if (offset + item_size > buf_size)
throw NetworkPacketError("not enough space to write");
}
void NetworkPacket::check_read_size (size_t item_size) {
if (offset + item_size > data_size)
throw NetworkPacketError("not enough data to read");
}
void NetworkPacket::write (const void *ptr, size_t len) {
// check buffer overflow
check_write_size(len);
// set value
memcpy(buf + offset, ptr, len);
// update offset and size
offset += len;
data_size += len;
}
void NetworkPacket::read (void *ptr, size_t len) {
// check buffer underflow
check_read_size(len);
// set value
memcpy(ptr, buf + offset, len);
// update offset
offset += len;
}
template <typename T> T NetworkPacket::read_val (void) {
T val;
// read
read(&val, sizeof(T));
// return
return val;
}
template <typename T> void NetworkPacket::write_val (const T &val) {
// write
write(&val, 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>();
}
float NetworkPacket::read_float32 (void) {
int32_t ival = read_int32();
return *((float *) &ival);
}
Vector NetworkPacket::read_vector (void) {
float fx = read_float32();
float fy = read_float32();
return Vector(fx, fy);
}
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);
}
void NetworkPacket::write_float32 (float val) {
write_int32(*((int32_t *) &val));
}
void NetworkPacket::write_vector (const Vector &vec) {
write_float32(vec.x);
write_float32(vec.y);
}
void NetworkPacket::write_packet (const NetworkPacket &pkt) {
// check buffer size
check_write_size(pkt.get_data_size());
// copy
memcpy(buf + offset, pkt.get_buf(), pkt.get_data_size());
// update offset/data_size
offset += pkt.get_data_size();
data_size += pkt.get_data_size();
}