ObjFW  Check-in [f5dd9b7f73]

			TYPE_LESS_EQUAL,
			TYPE_GREATER,
			TYPE_GREATER_EQUAL,
			TYPE_ADD,
			TYPE_MODULO,
			TYPE_AND,
			TYPE_OR,
			TYPE_NOT
			TYPE_NOT,
			TYPE_IS_REAL
		} type;
		id var, first, second;
		size_t stackSize;

		if ([atom isEqual: @"=="]) {
			type = TYPE_EQUAL;
		} else if ([atom isEqual: @"!="]) {

			type = TYPE_MODULO;
		} else if ([atom isEqual: @"&&"]) {
			type = TYPE_AND;
		} else if ([atom isEqual: @"||"]) {
			type = TYPE_OR;
		} else if ([atom isEqual: @"!"]) {
			type = TYPE_NOT;
		} else if ([atom isEqual: @"."]) {
			type = TYPE_IS_REAL;
		} else {
			of_unichar_t firstCharacter =
			    [atom characterAtIndex: 0];

			if (firstCharacter >= '0' && firstCharacter <= '9')
			if ((firstCharacter >= '0' && firstCharacter <= '9') ||
			    firstCharacter == '-')
				type = TYPE_LITERAL;
			else
				type = TYPE_VARIABLE;
		}

		switch (type) {
		case TYPE_LITERAL:
			[stack addObject:
			    [OFNumber numberWithIntMax: atom.decimalValue]];
			    [OFNumber numberWithDouble: atom.doubleValue]];
			break;
		case TYPE_VARIABLE:
			if ((var = [variables objectForKey: atom]) == nil)
				@throw [OFInvalidFormatException exception];

			if ([var isKindOfClass: [OFString class]])
				var = [OFNumber numberWithIntMax:
				    [var decimalValue]];
				var = [OFNumber numberWithDouble:
				    [var doubleValue]];

			[stack addObject: var];
			break;
		case TYPE_EQUAL:
		case TYPE_NOT_EQUAL:
		case TYPE_LESS:
		case TYPE_LESS_EQUAL:

				    compare: second] == OF_ORDERED_DESCENDING];
				break;
			case TYPE_GREATER_EQUAL:
				var = [OFNumber numberWithBool: [first
				    compare: second] != OF_ORDERED_ASCENDING];
				break;
			case TYPE_ADD:
				var = [OFNumber numberWithIntMax:
				    [first intMaxValue] + [second intMaxValue]];
				var = [OFNumber numberWithDouble:
				    [first doubleValue] + [second doubleValue]];
				break;
			case TYPE_MODULO:
				var = [OFNumber numberWithIntMax:
				    [first intMaxValue] % [second intMaxValue]];
				break;
			case TYPE_AND:
				var = [OFNumber numberWithBool:

			[stack replaceObjectAtIndex: stackSize - 2
					 withObject: var];
			[stack removeLastObject];

			break;
		case TYPE_NOT:
		case TYPE_IS_REAL:
			stackSize = stack.count;
			first = stack.lastObject;

			switch (type) {
			case TYPE_NOT:
			first = [OFNumber numberWithBool:
			    ![stack.lastObject boolValue]];
				var = [OFNumber numberWithBool:
				    ![first boolValue]];
				break;
			case TYPE_IS_REAL:
				var = [OFNumber numberWithBool:
				    [first doubleValue] != [first intMaxValue]];
				break;
			default:
				OF_ENSURE(0);
			}

			[stack replaceObjectAtIndex: stackSize - 1
					 withObject: first];
					 withObject: var];
			break;
		}
	}

	if (stack.count != 1)
		@throw [OFInvalidFormatException exception];