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SomeCoin.sol

pragma solidity ^0.4.22;

contract SafeMath {
	function SafeMath() {
	}

	function safeAdd(uint256 _x, uint256 _y) internal returns (uint256) {
		uint256 z = _x + _y;
		assert(z >= _x);
		return z;
	}

	function safeSub(uint256 _x, uint256 _y) internal returns (uint256) {
		assert(_x >= _y);
		return _x - _y;
	}

	function safeMul(uint256 _x, uint256 _y) internal returns (uint256) {
		uint256 z = _x * _y;
		assert(_x == 0 || z / _x == _y);
		return z;
	}

	function safeDiv(uint a, uint b) internal returns (uint256) {
		assert(b > 0);
		return a / b;
	}
}


contract ERC20Interface {
    // function totalSupply() public constant returns (uint);
    // function balanceOf(address tokenOwner) public constant returns (uint balance);
    // function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
    function transfer(address to, uint tokens) public returns (bool success);
    function approve(address spender, uint tokens) public returns (bool success);
    function transferFrom(address from, address to, uint tokens) public returns (bool success);

    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}


/*
    Provides support and utilities for contract ownership
*/
contract Owned {
    address public owner;
    address public newOwner;

    event OwnerUpdate(address indexed _prevOwner, address indexed _newOwner);

    /**
        @dev constructor
    */
    function Owned() public {
        owner = msg.sender;
    }

    // allows execution by the owner only
    modifier ownerOnly {
        assert(msg.sender == owner);
        _;
    }

    /**
        @dev allows transferring the contract ownership
        the new owner still needs to accept the transfer
        can only be called by the contract owner

        @param _newOwner    new contract owner
    */
    function transferOwnership(address _newOwner) public ownerOnly {
        require(_newOwner != owner);
        newOwner = _newOwner;
    }

    /**
        @dev used by a new owner to accept an ownership transfer
    */
    function acceptOwnership() public {
        require(msg.sender == newOwner);
        OwnerUpdate(owner, newOwner);
        owner = newOwner;
        newOwner = address(0);
    }
}






contract Utils {
	function Utils() public {
	}

	// function compareStrings (string a, string b) view returns (bool){
	// 	return keccak256(a) == keccak256(b);
	// }

	// // verifies that an amount is greater than zero
	// modifier greaterThanZero(uint256 _amount) {
	//     require(_amount > 0);
	//     _;
	// }

	// validates an address - currently only checks that it isn't null
	modifier validAddress(address _address) {
	    require(_address != address(0));
	    _;
	}

	// verifies that the address is different than this contract address
	modifier notThis(address _address) {
	    require(_address != address(this));
	    _;
	}

	function strlen(string s) internal pure returns (uint) {
		// Starting here means the LSB will be the byte we care about
		uint ptr;
		uint end;
		assembly {
			ptr := add(s, 1)
			end := add(mload(s), ptr)
		}

		for (uint len = 0; ptr < end; len++) {
			uint8 b;
			assembly { b := and(mload(ptr), 0xFF) }
			if (b < 0x80) {
				ptr += 1;
			} else if(b < 0xE0) {
				ptr += 2;
			} else if(b < 0xF0) {
				ptr += 3;
			} else if(b < 0xF8) {
				ptr += 4;
			} else if(b < 0xFC) {
				ptr += 5;
			} else {
				ptr += 6;
			}
		}

		return len;
	}


}





contract bundinha is Utils {
	uint N;
	string bundinha;


	function setN(uint x) public {
		N = x;
	}

	function getN() constant public returns (uint) {
		return N;
	}

	function setBundinha(string x) public {
		require(strlen(x) <= 32);
		bundinha = x;
	}

	function getBundinha() constant public returns (string){
		return bundinha;
	}

}





contract SomeCoin is Utils, ERC20Interface, Owned, SafeMath, bundinha {
	uint myVariable;
	string bundinha;

	string public name = '';
	string public symbol = '';
	uint8 public decimals = 0;
	uint256 public totalSupply = 0;
	uint256 public maxSupply = 50000000000000000000000;
							// 50000.

	mapping (address => uint256) public balanceOf;
	mapping (address => mapping (address => uint256)) public allowance;

	event Transfer(address indexed _from, address indexed _to, uint256 _value);
	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    event Issuance(uint256 _amount);

	// function SomeCoin(string _name, string _symbol, uint8 _decimals, uint256 supply) {
	function SomeCoin(string _name, string _symbol, uint8 _decimals) {
		require(bytes(_name).length > 0 && bytes(_symbol).length > 0); // validate input

		name = _name;
		symbol = _symbol;
		decimals = _decimals;
		// totalSupply = supply;
	}

	function validSupply() private returns(bool) {
		return totalSupply <= maxSupply;
	}

	function transfer(address _to, uint256 _value)
		public
		validAddress(_to)
		returns (bool success)
	{
		balanceOf[msg.sender] = safeSub(balanceOf[msg.sender], _value);
		balanceOf[_to] = safeAdd(balanceOf[_to], _value);
		Transfer(msg.sender, _to, _value);
		return true;
	}

	function transferFrom(address _from, address _to, uint256 _value)
		public
		validAddress(_from)
		validAddress(_to)
		returns (bool success)
	{
		allowance[_from][msg.sender] = safeSub(allowance[_from][msg.sender], _value);
		balanceOf[_from] = safeSub(balanceOf[_from], _value);
		balanceOf[_to] = safeAdd(balanceOf[_to], _value);
		Transfer(_from, _to, _value);
		return true;
	}

	function approve(address _spender, uint256 _value)
		public
		validAddress(_spender)
		returns (bool success)
	{
		require(_value == 0 || allowance[msg.sender][_spender] == 0);

		allowance[msg.sender][_spender] = _value;
		Approval(msg.sender, _spender, _value);
		return true;
	}

	function issue(address _to, uint256 _amount)
	    public
	    ownerOnly
	    validAddress(_to)
	    notThis(_to)
	{
	    totalSupply = safeAdd(totalSupply, _amount);
	    balanceOf[_to] = safeAdd(balanceOf[_to], _amount);

	    require(validSupply());

	    Issuance(_amount);
	    Transfer(this, _to, _amount);
	}

	function transferAnyERC20Token(address _token, address _to, uint256 _amount)
		public
		ownerOnly
	    validAddress(_token)
		returns (bool success)
	{
		return ERC20Interface(_token).transfer(_to, _amount);
	}

	// Don't accept ETH
	function () payable {
		revert();
	}
}