ExpRegistrar

// Submitted by EthereumHistory (ethereumhistory.com)
// Simple global registrar with fixed-fee reservations.
// @authors:
//   Gav Wood <g@ethdev.com>

contract Registrar {
	event Changed(string indexed name);

	function owner(string _name) constant returns (address o_owner);
	function addr(string _name) constant returns (address o_address);
	function subRegistrar(string _name) constant returns (address o_subRegistrar);
	function content(string _name) constant returns (bytes32 o_content);
	function name(address _addr) constant returns (string o_name);
}

contract ExpRegistrar is Registrar {
	struct Record {
		address addr;
		address subRegistrar;
		bytes32 content;
		address owner;
		uint price;
	}


	modifier onlyrecordowner(string _name) { if (m_record[_name].owner == msg.sender) _ }
	function setContent(string _name, bytes32 _content) onlyrecordowner(_name) {
		m_record[_name].content = _content;
		Changed(_name);
	}

	
	function reserve(string _name) {
	    Record rec = m_record[_name];
		if ((rec.owner == 0 && msg.value >= 1 ether) || (rec.owner != 0 && msg.value >= rec.price)) {
			if (rec.price > 0)
				rec.owner.send(rec.price);
			else
				rec.price = msg.value;
			rec.price *= 2;
			rec.owner = msg.sender;
			Changed(_name);
		}
	}
	function transfer(string _name, address _newOwner) onlyrecordowner(_name) {
		m_record[_name].owner = _newOwner;
		Changed(_name);
	}
	function setAddr(string _name, address _a) onlyrecordowner(_name) {
		m_record[_name].addr = _a;
		Changed(_name);
	}
	function setSubRegistrar(string _name, address _registrar) onlyrecordowner(_name) {
		m_record[_name].subRegistrar = _registrar;
		Changed(_name);
	}
	function setName(string _name) {
		m_reverse[msg.sender] = _name;
	}
	
	function record(string _name) constant returns (address o_addr, address o_subRegistrar, bytes32 o_content, address o_owner) {
	    Record rec = m_record[_name];
		o_addr = rec.addr;
		o_subRegistrar = rec.subRegistrar;
		o_content = rec.content;
		o_owner = rec.owner;
	}
	function addr(string _name) constant returns (address) { return m_record[_name].addr; }
	function subRegistrar(string _name) constant returns (address) { return m_record[_name].subRegistrar; }
	function content(string _name) constant returns (bytes32) { return m_record[_name].content; }
	function owner(string _name) constant returns (address) { return m_record[_name].owner; }
	function name(address _addr) constant returns (string) { return m_reverse[_addr]; }

	mapping (string => Record) m_record;
	mapping (address => string) m_reverse;
}