CodeMirror.defineMode('z80', function()
{
	var keywords1 = /^(exx?|(ld|cp|in)([di]r?)?|pop|push|ad[cd]|cpl|daa|dec|inc|neg|sbc|sub|and|bit|[cs]cf|x?or|res|set|r[lr]c?a?|r[lr]d|s[lr]a|srl|djnz|nop|rst|[de]i|halt|im|ot[di]r|out[di]?)\b/i;
	var keywords2 = /^(call|j[pr]|ret[in]?)\b/i;
	var keywords3 = /^b_?(call|jump)\b/i;
	var variables1 = /^(af?|bc?|c|de?|e|hl?|l|i[xy]?|r|sp)\b/i;
	var variables2 = /^(n?[zc]|p[oe]?|m)\b/i;
	var errors = /^([hl][xy]|i[xy][hl]|slia|sll)\b/i;
	var numbers = /^([\da-f]+h|[0-7]+o|[01]+b|\d+)\b/i;
	
	return {startState: function()
	{
		return {context: 0};
	}, token: function(stream, state)
	{
		if (!stream.column())
			state.context = 0;
		
		if (stream.eatSpace())
			return null;
		
		var w;
		
		if (stream.eatWhile(/\w/))
		{
			w = stream.current();
			
			if (stream.indentation())
			{
				if (state.context == 1 && variables1.test(w))
					return 'variable-2';
				
				if (state.context == 2 && variables2.test(w))
					return 'variable-3';
				
				if (keywords1.test(w))
				{
					state.context = 1;
					return 'keyword';
				}
				else if (keywords2.test(w))
				{
					state.context = 2;
					return 'keyword';
				}
				else if (keywords3.test(w))
				{
					state.context = 3;
					return 'keyword';
				}
				
				if (errors.test(w))
					return 'error';
			}
			else if (numbers.test(w))
			{
				return 'number';
			}
			else
			{
				return null;
			}
		}
		else if (stream.eat(';'))
		{
			stream.skipToEnd();
			return 'comment';
		}
		else if (stream.eat('"'))
		{
			while (w = stream.next())
			{
				if (w == '"')
					break;
				
				if (w == '\\')
					stream.next();
			}
			
			return 'string';
		}
		else if (stream.eat('\''))
		{
			if (stream.match(/\\?.'/))
				return 'number';
		}
		else if (stream.eat('.') || stream.sol() && stream.eat('#'))
		{
			state.context = 4;
			
			if (stream.eatWhile(/\w/))
				return 'def';
		}
		else if (stream.eat('$'))
		{
			if (stream.eatWhile(/[\da-f]/i))
				return 'number';
		}
		else if (stream.eat('%'))
		{
			if (stream.eatWhile(/[01]/))
				return 'number';
		}
		else
		{
			stream.next();
		}
		
		return null;
	}};
});

CodeMirror.defineMIME("text/x-z80", "z80");
