private static StatementBlock ParseStatementBlock(BinaryReader reader, Encoding encoding, BinaryWriter lineOffestWriter, BinaryWriter blockOffestWriter)
{
var block = new StatementBlock();
while (!(reader.BaseStream.Position == reader.BaseStream.Length))
{
var type = reader.ReadByte();
while (Array.BinarySearch(KnownTypeId, type) < 0)
{
// 尝试跳过未知信息
type = reader.ReadByte();
}
var startOffest = (int)reader.BaseStream.Position - 1; // typeId到代码数据开头的偏移位置
if (lineOffestWriter != null)
{
if (true && // 部分数据不需要将位置写入LineOffest（一般为在IDE无显示的数据）
type != 0x50 && // 否则
type != 0x51 && // 如果结束
type != 0x52 && // 如果真结束
type != 0x55 && // 循环块结束标识：0x71前
type != 0x54 && // .判断结束
type != 0x53 && // .判断 某Case结束
type != 0x6D && // .判断开始（紧接着就是 0x6E）
type != 0x6F) // .默认)
{
lineOffestWriter.Write(startOffest);
}
}
switch (type)
{
case 0x50: // 否则
case 0x51: // 如果结束
case 0x52: // 如果真结束
case 0x53: // .判断 某Case结束
case 0x54: // .判断结束
case 0x6F: // .默认
case 0x71: // 循环结束语句：XX循环尾(参数...)
reader.BaseStream.Position = startOffest;
return(block);
case 0x55: // 循环体结束标识（0x71前）
continue;
case 0x6D: // .判断开始（紧接着就是 0x6E）
{
blockOffestWriter.Write((byte)4);
blockOffestWriter.Write(startOffest);
long posToFillEndOffest = blockOffestWriter.BaseStream.Position;
blockOffestWriter.Write(0);
var s = new SwitchStatement();
if (reader.ReadByte() != 0x6E) // .判断 某Case开始
{
throw new Exception();
}
byte switch_type;
do
{
lineOffestWriter.Write((int)reader.BaseStream.Position - 1);
var caseInfo = new SwitchStatement.CaseInfo();
caseInfo.Condition = ParseCallExpressionWithoutType(reader, encoding, out var caseInfo_UnexaminedCode, out var caseInfo_Comment, out var caseInfo_Mask).ParamList.ElementAtOrDefault(0);
caseInfo.UnexaminedCode = caseInfo_UnexaminedCode;
caseInfo.Comment = caseInfo_Comment;
caseInfo.Mask = caseInfo_Mask;
caseInfo.Block = ParseStatementBlock(reader, encoding, lineOffestWriter, blockOffestWriter);
s.Case.Add(caseInfo);
if (reader.ReadByte() != 0x53)
{
throw new Exception();
}
} while ((switch_type = reader.ReadByte()) == 0x6E);
if (switch_type != 0x6F) // .默认
{
throw new Exception();
}
s.DefaultBlock = ParseStatementBlock(reader, encoding, lineOffestWriter, blockOffestWriter);
if (reader.ReadByte() != 0x54) // .判断结束
{
throw new Exception();
}
int endOffest = (int)reader.BaseStream.Position;
blockOffestWriter.BaseStream.Position = posToFillEndOffest;
blockOffestWriter.Write(endOffest);
blockOffestWriter.BaseStream.Seek(0, SeekOrigin.End);
reader.ReadByte(); // 0x74
block.Add(s);
}
continue;
}
var exp = ParseCallExpressionWithoutType(reader, encoding, out string unexaminedCode, out string comment, out bool mask);
switch (type)
{
case 0x70: // 循环开始语句：XX循环首(参数...)
{
blockOffestWriter.Write((byte)3);
blockOffestWriter.Write(startOffest);
long posToFillEndOffest = blockOffestWriter.BaseStream.Position;
blockOffestWriter.Write(0);
var loopblock = ParseStatementBlock(reader, encoding, lineOffestWriter, blockOffestWriter);
CallExpression endexp = null;
var endOffest = (int)reader.BaseStream.Position;
blockOffestWriter.BaseStream.Position = posToFillEndOffest;
blockOffestWriter.Write(endOffest);
blockOffestWriter.BaseStream.Seek(0, SeekOrigin.End);
string endexp_unexaminedCode;
string endexp_comment;
bool endexp_mask;
switch (reader.ReadByte())
{
case 0x71:
endexp = ParseCallExpressionWithoutType(reader, encoding, out endexp_unexaminedCode, out endexp_comment, out endexp_mask);
break;
default:
throw new Exception();
}
if (exp.LibraryId != 0)
{
throw new Exception();
}
LoopStatement s = null;
switch (exp.MethodId)
{
case 3:
s = new WhileStatement()
{
Condition = exp.ParamList.ElementAtOrDefault(0),
Block = loopblock,
UnexaminedCode = unexaminedCode
};
break;
case 5:
s = new DoWhileStatement()
{
Condition = endexp.ParamList.ElementAtOrDefault(0),
Block = loopblock,
UnexaminedCode = endexp_unexaminedCode
};
break;
case 7:
s = new CounterStatement()
{
Count = exp.ParamList.ElementAtOrDefault(0),
Var = exp.ParamList.ElementAtOrDefault(1),
Block = loopblock,
UnexaminedCode = unexaminedCode
};
break;
case 9:
s = new ForStatement()
{
Start = exp.ParamList.ElementAtOrDefault(0),
End = exp.ParamList.ElementAtOrDefault(1),
Step = exp.ParamList.ElementAtOrDefault(2),
Var = exp.ParamList.ElementAtOrDefault(3),
Block = loopblock,
UnexaminedCode = unexaminedCode
};
break;
default:
throw new Exception();
}
s.CommentOnStart = comment;
s.CommentOnEnd = endexp_comment;
s.MaskOnStart = mask;
s.MaskOnEnd = endexp_mask;
block.Add(s);
}
break;
case 0x6C: // 如果真
{
blockOffestWriter.Write((byte)2);
blockOffestWriter.Write(startOffest);
long posToFillEndOffest = blockOffestWriter.BaseStream.Position;
blockOffestWriter.Write(0);
var s = new IfStatement()
{
Condition = exp.ParamList.ElementAtOrDefault(0),
UnexaminedCode = unexaminedCode,
Block = ParseStatementBlock(reader, encoding, lineOffestWriter, blockOffestWriter),
Comment = comment,
Mask = mask
};
if (reader.ReadByte() != 0x52)
{
throw new Exception();
}
var endOffest = (int)reader.BaseStream.Position;
blockOffestWriter.BaseStream.Position = posToFillEndOffest;
blockOffestWriter.Write(endOffest);
blockOffestWriter.BaseStream.Seek(0, SeekOrigin.End);
reader.ReadByte(); // 0x73
block.Add(s);
}
break;
case 0x6B: // 如果
{
var s = new IfElseStatement()
{
Condition = exp.ParamList.ElementAtOrDefault(0),
UnexaminedCode = unexaminedCode,
Comment = comment,
Mask = mask
};
blockOffestWriter.Write((byte)1);
blockOffestWriter.Write(startOffest);
long posToFillEndOffest = blockOffestWriter.BaseStream.Position;
blockOffestWriter.Write(0);
s.BlockOnTrue = ParseStatementBlock(reader, encoding, lineOffestWriter, blockOffestWriter);
if (reader.ReadByte() != 0x50)
{
throw new Exception();
}
s.BlockOnFalse = ParseStatementBlock(reader, encoding, lineOffestWriter, blockOffestWriter);
if (reader.ReadByte() != 0x51)
{
throw new Exception();
}
var endOffest = (int)reader.BaseStream.Position;
blockOffestWriter.BaseStream.Position = posToFillEndOffest;
blockOffestWriter.Write(endOffest);
blockOffestWriter.BaseStream.Seek(0, SeekOrigin.End);
reader.ReadByte(); // 0x72
block.Add(s);
}
break;
case 0x6A: // 常规Call
{
if (unexaminedCode != null)
{
block.Add(new UnexaminedStatement()
{
UnexaminedCode = unexaminedCode,
Mask = mask
});
}
else
{
if (exp.LibraryId == -1)
{
block.Add(new ExpressionStatement()
{
Expression = null,
Comment = comment
});
}
else
{
block.Add(new ExpressionStatement()
{
Expression = exp,
Comment = comment,
Mask = mask
});
}
}
}
break;
}
}
return(block);
}
