#include "stdafx.h"
#include "utils.h"

CRITICAL_SECTION cs;

//----< throw exception string >---------------------------------------

void throwString(const char *msg, const char *file, int line) {

  int errType = WSAGetLastError();
  std::ostringstream collect;
  std::string duplicatesMsg = "Server is already running in another instance of the application.";
  duplicatesMsg += "\nSo you can connect to other machines, but other machines will";
  duplicatesMsg += "\nconnect to the application which has the server running.  To";
  duplicatesMsg += "\nrun the server in this application quit all instances of the";
  duplicatesMsg += "\napplication and restart the application.";
  if (errType == 10048) throw duplicatesMsg;
  collect << msg << " " << errType
          << "\nfile: " << file 
          << "\nline: " << line << '\n' << std::ends;
  const char *debug = collect.str().c_str();
  throw collect.str();
}

//----< create socket >----------------------------------------

SOCKET createSocket() {

  SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if(sock == INVALID_SOCKET)
    throwString("\n  initialization error type:",__FILE__, __LINE__);

  InitializeCriticalSection(&cs);
  return sock;
}

//----< initialize socket run-time >---------------------------

void initializeSockets() {

  WORD version = MAKEWORD(1,1);
  WSADATA wsa;
  if(WSAStartup(version,&wsa) == SOCKET_ERROR)
	throwString("\n  initialization error type:",__FILE__, __LINE__);

}

//----< terminate socket run-time >----------------------------

void cleanUpSockets() { 
	WSACleanup();
	DeleteCriticalSection(&cs);
}

//----< convert binary data to hex >------------------------

std::string toHex(unsigned short value) {

  std::string temp;
  const int mask = 0xf;
  while(value > 0) {
    temp.insert(0,HalfByteToHex(mask & value));
    value = value >> 4;
  }
  while(temp.size() < 2*sizeof(unsigned short))
    temp.insert(0,'0');
  return temp;
}

//----< convert hex data to binary >------------------------

unsigned int toBin(std::string value) {

	unsigned int temp = 0;
	for (int i=0; i<value.length(); i++) {
		temp = temp | HalfByteToBin(value[i]);
		if (i<value.length()-1)	temp = temp << 4;
	}
	return temp;
}