internal RightValue ParseValue(string value, Location loc)
{
//TODO: 类型歧义问题
if (intValuePattern.IsMatch(value))
{
IntConst result = new IntConst();
result.Value = int.Parse(value);
return(result);
}
else if (floatValuePattern.IsMatch(value))
{
FloatConst result = new FloatConst();
result.Value = double.Parse(value);
return(result);
}
else if (boolValuePattern.IsMatch(value))
{
BoolConst result = new BoolConst();
result.Value = bool.Parse(value);
return(result);
}
else
{
StringConst result = new StringConst();
result.Value = value;
return(result);
}
}
internal RightValue ParseValue(object value, DataType type, Location loc)
{
//TODO: 完整实现
switch (type)
{
case DataType.Int:
IntConst intResult = new IntConst();
intResult.Value = (int)value;
return(intResult);
case DataType.Float:
FloatConst floatResult = new FloatConst();
floatResult.Value = (double)value;
return(floatResult);
case DataType.Bool:
BoolConst boolResult = new BoolConst();
boolResult.Value = (bool)value;
return(boolResult);
case DataType.String:
StringConst strResult = new StringConst();
strResult.Value = (string)value;
return(strResult);
}
return(null);
}
internal RightValue ParseValue(string value, DataType type, Location loc)
{
switch (type)
{
case DataType.Int:
int intParsed;
if (!int.TryParse(value, out intParsed))
{
kernel.IssueError(ErrorType.ParseTypeError, loc, value, type.ToString());
return(null);
}
IntConst intResult = new IntConst();
intResult.Value = intParsed;
return(intResult);
case DataType.Float:
float floatParsed;
if (!float.TryParse(value, out floatParsed))
{
kernel.IssueError(ErrorType.ParseTypeError, loc, value, type.ToString());
return(null);
}
FloatConst floatResult = new FloatConst();
floatResult.Value = floatParsed;
return(floatResult);
case DataType.Bool:
bool boolParsed;
int boolIntParsed;
double boolFloatParsed;
BoolConst boolResult = new BoolConst();
if (bool.TryParse(value, out boolParsed))
{
boolResult.Value = boolParsed;
return(boolResult);
}
else if (int.TryParse(value, out boolIntParsed))
{
boolResult.Value = (boolIntParsed != 0);
return(boolResult);
}
else if (double.TryParse(value, out boolFloatParsed))
{
boolResult.Value = (boolFloatParsed != 0);
return(boolResult);
}
else
{
kernel.IssueError(ErrorType.ParseTypeError, loc, value, type.ToString());
return(null);
}
case DataType.String:
StringConst strConst = new StringConst();
strConst.Value = value;
return(strConst);
}
return(null);
}
internal RightValueExpr CreateStringConst(string value, Location loc)
{
StringConst strConst = new StringConst();
strConst.Value = value;
RightValueExpr expr = new RightValueExpr();
expr.RightValue = strConst;
expr.Location = loc;
return(expr);
}
/// <summary>
/// end表示字符串最后一个字符的后一个位置
/// </summary>
/// <param name="begin"></param>
/// <param name="end"></param>
/// <returns></returns>
private Expression parse(int begin, int end)
{
if (begin >= end)
{
kernel.IssueError(ErrorType.ExpressionSyntaxError, loc.Offset(begin));
return(null);
}
while (isWhiteSpace(expr[begin]))
{
begin++;
}
while (isWhiteSpace(expr[end - 1]))
{
end--;
}
int currentParenLevel;
bool hasSideParren = true;
while (expr[begin] == '(' && hasSideParren)
{
currentParenLevel = 0;
int currentPos;
for (currentPos = begin; currentPos < end; currentPos++)
{
if (expr[currentPos] == '(')
{
currentParenLevel++;
}
else if (expr[currentPos] == ')')
{
currentParenLevel--;
if (currentParenLevel == 0)
{
if (currentPos == end - 1)
{
begin++;
end--;
}
else
{
hasSideParren = false;
}
break;
}
}
}
if (currentPos == end && currentParenLevel > 0)
{
kernel.IssueError(ErrorType.SingleParen, loc.Offset(begin));
return(null);
}
}
currentParenLevel = 0;
OpLevel currentLevel = OpLevel.Null;
OpLevel minLevel = OpLevel.Null;
int minPos = -1;
int minOpLength = 0;
bool findOp = false;
string op = null;
MatchTokenResult matchTokenResult;
//找到当前应处理的操作符
for (int currentPos = begin; currentPos < end; currentPos = matchTokenResult.EndPos)
{
//if (expr[currentPos] == ' ' || expr[currentPos] == '\t' || expr[currentPos] == '\n'
// || Environment.NewLine.IndexOf(expr[currentPos]) != -1)
//{
// op = null;
// continue;
//}
matchTokenResult = MatchToken(currentPos, end);
if (matchTokenResult.TokenType == TokenType.Error)
{
return(null);
}
if (matchTokenResult.TokenType != TokenType.Operator)
{
continue;
}
op = matchTokenResult.Matched;
if (op != "(" && op != ")")
{
findOp = true;
}
if (op == "(")
{
currentParenLevel++;
continue;
}
else if (op == ")")
{
currentParenLevel--;
continue;
}
else if (currentParenLevel > 0)
{
continue;
}
else if (currentParenLevel < 0)
{
kernel.IssueError(ErrorType.SingleParen, loc.Offset(currentPos));
return(null);
}
if (currentParenLevel == 0 &&
(
(int)(currentLevel = getOpLevel(op)) < (int)minLevel) ||
((int)currentLevel == (int)minLevel && op != "=") //=为右结合
)
{
minLevel = currentLevel;
minPos = matchTokenResult.BeginPos;
minOpLength = op.Length;
}
}
if (currentParenLevel != 0)
{
kernel.IssueError(ErrorType.SingleParen, loc.Offset(begin));
return(null);
}
if (!findOp) //单个数据
{
string str = expr.Substring(begin, end - begin);
int currentPos = begin;
matchTokenResult = MatchToken(currentPos, end);
switch (matchTokenResult.TokenType)
{
case TokenType.Int:
RightValueExpr intResult = new RightValueExpr();
IntConst intConst = new IntConst();
intConst.Value = int.Parse(matchTokenResult.Matched);
intResult.DataType = DataType.Int;
intResult.RightValue = intConst;
intResult.Location = loc.Offset(begin);
return(intResult);
case TokenType.Float:
RightValueExpr floatResult = new RightValueExpr();
FloatConst floatConst = new FloatConst();
floatConst.Value = float.Parse(matchTokenResult.Matched);
floatResult.DataType = DataType.Float; //modified by Wander @ 2011
floatResult.RightValue = floatConst;
floatResult.Location = loc.Offset(begin);
return(floatResult);
case TokenType.String:
RightValueExpr strResult = new RightValueExpr();
StringConst strConst = new StringConst();
strConst.Value = matchTokenResult.Matched;
strResult.DataType = DataType.String;
strResult.RightValue = strConst;
strResult.Location = loc.Offset(begin);
return(strResult);
case TokenType.Bool:
RightValueExpr boolResult = new RightValueExpr();
BoolConst boolConst = new BoolConst();
boolConst.Value = bool.Parse(matchTokenResult.Matched);
boolResult.DataType = DataType.Bool;
boolResult.RightValue = boolConst;
boolResult.Location = loc.Offset(begin);
return(boolResult);
case TokenType.Variable:
VarRef varRef = new VarRef();
varRef.VarName = matchTokenResult.Matched;
LeftValueExpr leftValueResult = new LeftValueExpr();
leftValueResult.DataType = DataType.Unknown;
leftValueResult.Location = loc.Offset(begin);
leftValueResult.LeftValue = varRef;
return(leftValueResult);
default:
kernel.IssueError(ErrorType.ExpressionSyntaxError, loc.Offset(begin));
return(null);
}
}
Expression left;
Expression right;
matchTokenResult = MatchToken(minPos, end);
op = matchTokenResult.Matched;
left = (begin != minPos) ? parse(begin, minPos) : null; //null表示单目运算符
right = parse(matchTokenResult.EndPos, end);
Location currentLoc = loc.Offset(begin);
if (right == null)
{
return(null);
}
switch (op)
{
case "=":
if (!(left is LeftValueExpr))
{
kernel.IssueError(ErrorType.NotLeftValue, currentLoc);
return(null);
}
AssignExpr assignExpr = new AssignExpr();
assignExpr.LeftExpr = left as LeftValueExpr;
assignExpr.RightExpr = right;
assignExpr.DataType = right.DataType;
assignExpr.Location = currentLoc;
return(assignExpr);
case "&&":
return(processBinaryLogicExpr(
new AndExpr(),
left, right, currentLoc));
case "||":
return(processBinaryLogicExpr(
new OrExpr(),
left, right, currentLoc));
case "==":
return(processBinaryCmpExpr(new EquExpr(), left, right, currentLoc));
case "!=":
return(processBinaryCmpExpr(new NeqExpr(), left, right, currentLoc));
case ">":
return(processBinaryCmpExpr(new GreatExpr(), left, right, currentLoc));
case ">=":
return(processBinaryCmpExpr(new GreatEquExpr(), left, right, currentLoc));
case "<":
return(processBinaryCmpExpr(new LessExpr(), left, right, currentLoc));
case "<=":
return(processBinaryCmpExpr(new LessEquExpr(), left, right, currentLoc));
case "+":
return(processBinaryAlgoExpr(new AddExpr(), left, right, currentLoc));
case "-":
if (left == null)
{
NegativeExpr negExpr = new NegativeExpr();
if (right.DataType == DataType.Bool || right.DataType == DataType.String)
{
kernel.IssueError(ErrorType.OprandTypeError, currentLoc);
return(null);
}
else if (right.DataType == DataType.Int)
{
negExpr.DataType = DataType.Int;
}
else if (right.DataType == DataType.Float)
{
negExpr.DataType = DataType.Float;
}
else
{
negExpr.DataType = DataType.Unknown;
}
negExpr.Op = right;
negExpr.Location = currentLoc;
return(negExpr);
}
else
{
return(processBinaryAlgoExpr(new SubExpr(), left, right, currentLoc));
}
case "*":
return(processBinaryAlgoExpr(new MulExpr(), left, right, currentLoc));
case "/":
return(processBinaryAlgoExpr(new DivExpr(), left, right, currentLoc));
case "^":
return(processBinaryAlgoExpr(new PowExpr(), left, right, currentLoc));
case "!":
if (left != null)
{
kernel.IssueError(ErrorType.ExpressionSyntaxError, currentLoc);
return(null);
}
else
{
NotExpr notExpr = new NotExpr();
notExpr.DataType = DataType.Bool;
notExpr.Op = right;
notExpr.Location = currentLoc;
return(notExpr);
}
}
return(null);
}
private void ReadBytecode(Stream input, FunctionDefinition funcDef)
{
funcDef.Instructions = new List <IInstruction>();
funcDef.InstructionOffsets = new List <int>();
var unencodedByteCodeLength = input.ReadValueEncodedS32();
int read;
for (read = 0; read < unencodedByteCodeLength;)
{
funcDef.InstructionOffsets.Add(read);
var op = input.ReadValueU8();
var opcode = (Script.Opcode)op;
read++;
Script.IInstruction instruction = null;
switch (opcode)
{
case Script.Opcode.OP_Target:
{
instruction = new Target();
break;
}
case Script.Opcode.OP_ShortConst:
{
instruction = new ShortConst();
break;
}
case Script.Opcode.OP_IntConst:
{
instruction = new IntConst();
break;
}
case Script.Opcode.OP_FloatConst:
{
instruction = new FloatConst();
break;
}
case Script.Opcode.OP_StringConst:
{
instruction = new StringConst(this);
break;
}
case Script.Opcode.OP_VirtualFunc:
{
instruction = new VirtualFunc(this);
break;
}
case Script.Opcode.OP_Context:
case Script.Opcode.OP_SwitchLabel:
{
instruction = new U16U16(opcode);
break;
}
case Script.Opcode.OP_Assign:
case Script.Opcode.OP_JumpIfFalse:
case Script.Opcode.OP_Jump:
case Script.Opcode.OP_Skip:
{
instruction = new U16(opcode);
break;
}
case Script.Opcode.OP_LocalVar:
case Script.Opcode.OP_ObjectVar:
case Script.Opcode.OP_ParamVar:
case Script.Opcode.OP_StructMember:
{
instruction = new TypeMember(opcode, this);
break;
}
case Script.Opcode.OP_Switch:
{
instruction = new Switch();
break;
}
case Script.Opcode.OP_Constructor:
{
instruction = new Constructor(this);
break;
}
case Script.Opcode.OP_TestEqual:
case Script.Opcode.OP_EnumToInt:
case Script.Opcode.OP_ArrayPushBack:
case Script.Opcode.OP_ArraySize:
case Script.Opcode.OP_ArrayElement:
case Script.Opcode.OP_New:
case Script.Opcode.OP_ArrayClear:
case Script.Opcode.OP_DynamicCast:
case Script.Opcode.OP_ArrayContainsFast:
case Script.Opcode.OP_ArrayRemoveFast:
case Script.Opcode.OP_TestNotEqual:
case Script.Opcode.OP_ArrayErase:
case Script.Opcode.OP_EnumToString:
case Script.Opcode.OP_ArrayContains:
case Script.Opcode.OP_ArrayResize:
case Script.Opcode.OP_ArrayInsert:
case Script.Opcode.OP_ArrayGrow:
case Script.Opcode.OP_ArrayFindFirstFast:
case Script.Opcode.OP_ArrayLast:
case Script.Opcode.OP_ArrayRemove:
case Script.Opcode.OP_SaveValue:
{
instruction = new TypeRef(opcode, this);
break;
}
case Script.Opcode.OP_NameConst:
{
instruction = new NameConst(Strings);
break;
}
case Script.Opcode.OP_FinalFunc:
{
instruction = new FinalFunc(this);
break;
}
case Script.Opcode.OP_EntryFunc:
case Script.Opcode.OP_SavePoint:
{
instruction = new U16S32(opcode, this);
break;
}
case Script.Opcode.OP_Nop:
case Script.Opcode.OP_ParamEnd:
case Script.Opcode.OP_IntZero:
case Script.Opcode.OP_IntOne:
case Script.Opcode.OP_BoolFalse:
case Script.Opcode.OP_BoolTrue:
case Script.Opcode.OP_Return:
case Script.Opcode.OP_GetServer:
case Script.Opcode.OP_GetCamera:
case Script.Opcode.OP_NameToString:
case Script.Opcode.OP_GetPlayer:
case Script.Opcode.OP_IntToFloat:
case Script.Opcode.OP_This:
case Script.Opcode.OP_Null:
case Script.Opcode.OP_GetGame:
case Script.Opcode.OP_ObjectToBool:
case Script.Opcode.OP_IntToString:
case Script.Opcode.OP_FloatToString:
case Script.Opcode.OP_IntToByte:
case Script.Opcode.OP_ObjectToString:
case Script.Opcode.OP_SwitchDefault:
case Script.Opcode.OP_BoolToString:
case Script.Opcode.OP_GetHud:
case Script.Opcode.OP_FloatToInt:
case Script.Opcode.OP_NameToBool:
case Script.Opcode.OP_Parent:
case Script.Opcode.OP_IntToBool:
case Script.Opcode.OP_ByteToInt:
case Script.Opcode.OP_FloatToBool:
case Script.Opcode.OP_ByteToFloat:
case Script.Opcode.OP_StringToBool:
case Script.Opcode.OP_SavePointEnd:
case Script.Opcode.OP_StringToInt:
case Script.Opcode.OP_GetSound:
{
instruction = new Simple(opcode);
break;
}
default:
{
throw new NotImplementedException("unhandled " + opcode.ToString());
}
}
read += instruction.Deserialize(input);
funcDef.Instructions.Add(instruction);
}
if (read != unencodedByteCodeLength)
{
throw new InvalidOperationException();
}
}
