pragma solidity ^0.4.4;

contract Token {

	/// @return total amount of tokens
	function totalSupply() constant returns (uint256 supply) {}

	/// @param _owner The address from which the balance will be retrieved
	/// @return The balance
	function balanceOf(address _owner) constant returns (uint256 balance) {}

	/// @notice send `_value` token to `_to` from `msg.sender`
	/// @param _to The address of the recipient
	/// @param _value The amount of token to be transferred
	/// @return Whether the transfer was successful or not
	function transfer(address _to, uint256 _value) returns (bool success) {}

	/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
	/// @param _from The address of the sender
	/// @param _to The address of the recipient
	/// @param _value The amount of token to be transferred
	/// @return Whether the transfer was successful or not
	function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}

	/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
	/// @param _spender The address of the account able to transfer the tokens
	/// @param _value The amount of wei to be approved for transfer
	/// @return Whether the approval was successful or not
	function approve(address _spender, uint256 _value) returns (bool success) {}

	/// @param _owner The address of the account owning tokens
	/// @param _spender The address of the account able to transfer the tokens
	/// @return Amount of remaining tokens allowed to spent
	function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}

	event Transfer(address indexed _from, address indexed _to, uint256 _value);
	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
	
}



contract StandardToken is Token {

	function transfer(address _to, uint256 _value) returns (bool success) {
		//Default assumes totalSupply can't be over max (2^256 - 1).
		//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
		//Replace the if with this one instead.
		//if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
		if (balances[msg.sender] >= _value && _value > 0) {
			balances[msg.sender] -= _value;
			balances[_to] += _value;
			Transfer(msg.sender, _to, _value);
			return true;
		} else { return false; }
	}

	function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
		//same as above. Replace this line with the following if you want to protect against wrapping uints.
		//if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
		if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
			balances[_to] += _value;
			balances[_from] -= _value;
			allowed[_from][msg.sender] -= _value;
			Transfer(_from, _to, _value);
			return true;
		} else { return false; }
	}

	function balanceOf(address _owner) constant returns (uint256 balance) {
		return balances[_owner];
	}

	function approve(address _spender, uint256 _value) returns (bool success) {
		allowed[msg.sender][_spender] = _value;
		Approval(msg.sender, _spender, _value);
		return true;
	}

	function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
	  return allowed[_owner][_spender];
	}

	mapping (address => uint256) balances;
	mapping (address => mapping (address => uint256)) allowed;
	uint256 public totalSupply;
}


//name this contract whatever you'd like
contract AMDToken is StandardToken {

	function () {
		//if ether is sent to this address, send it back.
		throw;
	}

	/* Public variables of the token */

	/*
	NOTE:
	The following variables are OPTIONAL vanities. One does not have to include them.
	They allow one to customise the token contract & in no way influences the core functionality.
	Some wallets/interfaces might not even bother to look at this information.
	*/
	string public name;                   //fancy name: eg Simon Bucks
	uint8 public decimals;                //How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
	string public symbol;                 //An identifier: eg SBX
	string public version = 'H1.0';       //human 0.1 standard. Just an arbitrary versioning scheme.

//
// CHANGE THESE VALUES FOR YOUR TOKEN
//

//make sure this function name matches the contract name above. So if you're token is called TutorialToken, make sure the //contract name above is also TutorialToken instead of ERC20Token

	function AMDToken(
		) {
		balances[msg.sender] = 100000000;               // Give the creator all initial tokens (100000 for example)
		totalSupply = 100000000;                        // Update total supply (100000 for example)
		name = "AMD Token";                                   // Set the name for display purposes
		decimals = 2;                            // Amount of decimals for display purposes
		symbol = "AMDT";                               // Set the symbol for display purposes
	}

	/* Approves and then calls the receiving contract */
	function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
		allowed[msg.sender][_spender] = _value;
		Approval(msg.sender, _spender, _value);

		//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
		//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
		//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
		if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
		return true;
	}
}