protected virtual void Typeref( byte[] code, ref int at )
{
var op = ((Opcode)code[at++]).Extend();
if( op.Kind() <= Opkind.Number )
{
if( (op == Opcode.Null) || (unchecked((byte)op) >= unchecked((byte)Opcode.String)) )
{
Value = Root.Get( op );
return;
}
if( op == Opcode.Ident )
{
Value = Ctx.Get( Cident( code, ref at ) );
return;
}
Value = new Value();
return;
}
if( op == Opcode.Array )
{
if( code[at++] != 0 )
{
throw new NotImplementedException( "Fixed and multi-dimensional arrays not implemented" );
}
Typeref( code, ref at );
Value = Root.Get( Opcode.Array, Value );
return;
}
throw new NotImplementedException();
}//Typeref
}//Refobj
/// <summary>
/// set the value for references
/// </summary>
public void Set( Value value )
{
if( Vt == Vtype.Ident )
{
((IProps)Ptr).Set( Str, value.Vt == Vtype.Ident ? ((IProps)value.Ptr).Get( value.Str ) : value );
}
}//Set
}//Typeref
protected override void Literal( Opcode op, byte[] code, ref int at )
{
int n;
switch( op )
{
case Opcode.Undef:
Value = new Value();
return;
case Opcode.Null:
Value = new Value( Vtype.Object, null );
return;
case Opcode.False:
Value = false;
return;
case Opcode.True:
Value = true;
return;
case Opcode.This:
Value = new Value( Ctx.Self );
return;
case Opcode.Base:
Value = new Value( Ctx.Self?.BaseClass );
return;
case Opcode.Ident:
var ident = Cident( code, ref at );
Value = new Value( Vtype.Ident, Ctx.Which( ident ) ?? Ctx.Root, ident );
return;
case Opcode.String:
n = code[at++];
if( n >= (1 << 7) )
{
n = (n & 127) + (code[at++] << 7);
if( n >= (1 << 14) )
{
n = (n & ((1 << 14) - 1)) + (code[at++] << 14);
if( n >= (1 << 21) )
{
n = (n & ((1 << 21) - 1)) + (code[at++] << 21);
}
}
}
Value = Encoding.UTF8.GetString( code, at, n );
at += n;
return;
case Opcode.Byte:
Value = code[at++];
return;
case Opcode.Ushort:
Value = Cushort( code, ref at );
return;
case Opcode.Uint:
Value = Cuint( code, ref at );
return;
case Opcode.Ulong:
Value = Culong( code, ref at );
return;
case Opcode.Sbyte:
Value = ((sbyte)code[at++]);
return;
case Opcode.Short:
Value = Cshort( code, ref at );
return;
case Opcode.Int:
Value = Cint( code, ref at );
return;
case Opcode.Long:
Value = Clong( code, ref at );
return;
case Opcode.Float:
Value = Cfloat( code, ref at );
return;
case Opcode.Double:
Value = Cdouble( code, ref at );
return;
}
throw new NotImplementedException();
}//Literal
}//Binary
protected override void Unary( Opcode op, byte[] code, ref int at )
{
Expression( code, ref at );
switch( op )
{
case Opcode.Plus:
Value = -Value;
return;
case Opcode.Neg:
Value = -Value;
return;
case Opcode.Flip:
Value = ~Value;
return;
case Opcode.Not:
Value = new Value( !Value.Bool );
return;
case Opcode.PostInc:
if( Value.Type == Vtype.Ident )
{
Value = Value.Self++;
}
return;
case Opcode.PostDec:
if( Value.Type == Vtype.Ident )
{
Value = Value.Self--;
}
return;
case Opcode.Inc:
++Value.Self;
return;
case Opcode.Dec:
++Value.Self;
return;
}
throw new NotImplementedException();
}//Unary
}//Special
protected override void Binary( Opcode op, byte[] code, ref int at )
{
Expression( code, ref at );
if( (op == Opcode.LogicAnd) || (op == Opcode.LogicOr) )
{
if( (Value == true) == (op == Opcode.LogicOr) )
{
Value = op == Opcode.LogicOr;
var n = Cint( code, ref at );
at += n;
return;
}
Expression( code, ref at );
return;
}
var left = Value;
Expression( code, ref at );
switch( op )
{
case Opcode.Assign:
left.Set( Value );
return;
case Opcode.OrAssign:
left.Set( Value = (left | Value) );
return;
case Opcode.XorAssign:
left.Set( Value = (left ^ Value) );
return;
case Opcode.AndAssign:
left.Set( Value = (left & Value) );
return;
case Opcode.LshAssign:
left.Set( Value = left.ShiftLeft( Value ) );
return;
case Opcode.RshAssign:
left.Set( Value = left.ShiftRight( Value ) );
return;
case Opcode.AddAssign:
left.Set( Value = (left + Value) );
return;
case Opcode.SubAssign:
left.Set( Value = (left - Value) );
return;
case Opcode.MulAssign:
left.Set( Value = (left * Value) );
return;
case Opcode.DivAssign:
left.Set( Value = (left / Value) );
return;
case Opcode.ModAssign:
left.Set( Value = (left % Value) );
return;
case Opcode.BitOr:
Value = left | Value;
return;
case Opcode.BitXor:
Value = left ^ Value;
return;
case Opcode.BitAnd:
Value = left & Value;
return;
case Opcode.ShiftLeft:
Value = left.ShiftLeft( Value );
return;
case Opcode.ShiftRight:
Value = left.ShiftRight( Value );
return;
case Opcode.Add:
Value = left + Value;
return;
case Opcode.Sub:
Value = left - Value;
return;
case Opcode.Mul:
Value = left * Value;
return;
case Opcode.Div:
Value = left / Value;
return;
case Opcode.Mod:
Value = left % Value;
return;
case Opcode.Equals:
Value = new Value( left == Value );
return;
case Opcode.Differ:
Value = new Value( left != Value );
return;
case Opcode.Less:
Value = new Value( left < Value );
return;
case Opcode.More:
Value = new Value( left > Value );
return;
case Opcode.Lesseq:
Value = new Value( left <= Value );
return;
case Opcode.Moreeq:
Value = new Value( left >= Value );
return;
}
throw new NotImplementedException();
}//Binary
}//Literal
protected override void Special( Opcode op, byte[] code, ref int at )
{
var create = false;
next:
switch( op )
{
case Opcode.Create:
create = true;
op = ((Opcode)code[at]).Extend();
if( (op.Kind() == Opkind.Special) && (unchecked((byte)op) < unchecked((byte)Opcode.Generic)) )
{
at++;
goto next;
}
goto case Opcode.Ecall;
case Opcode.Ecall:
if( create )
{
Typeref( code, ref at );
}
else
{
Expression( code, ref at );
}
Obj self = null;
if( Value.Type == Vtype.Ident )
{
self = Value.Ptr as Obj;
Value = ((IProps)Value.Ptr).Get( Value.Str );
}
var fn = Box( Value );
Value = create ? new Value( fn.Create( 0 ) ) : fn.Call( self, 0 );
return;
case Opcode.Call:
if( create )
{
Typeref( code, ref at );
}
else
{
Expression( code, ref at );
}
self = null;
if( Value.Type == Vtype.Ident )
{
self = Value.Ptr as Obj;
Value = ((IProps)Value.Ptr).Get( Value.Str );
}
fn = Box( Value );
Expression( code, ref at );
Args.Add( Result );
Value = create ? new Value( fn.Create( 1 ) ) : fn.Call( self, 1 );
Args.Remove( 1 );
return;
case Opcode.Call2:
if( create )
{
Typeref( code, ref at );
}
else
{
Expression( code, ref at );
}
self = null;
if( Value.Type == Vtype.Ident )
{
self = Value.Ptr as Obj;
Value = ((IProps)Value.Ptr).Get( Value.Str );
}
fn = Box( Value );
Expression( code, ref at );
Args.Add( Result );
Expression( code, ref at );
Args.Add( Result );
Value = create ? new Value( fn.Create( 2 ) ) : fn.Call( self, 2 );
Args.Remove( 2 );
return;
case Opcode.Mcall:
int n = code[at++];
if( create )
{
Typeref( code, ref at );
}
else
{
Expression( code, ref at );
}
self = null;
if( Value.Type == Vtype.Ident )
{
self = Value.Ptr as Obj;
Value = ((IProps)Value.Ptr).Get( Value.Str );
}
fn = Box( Value );
var argc = n - 1;
while( (--n) > 0 ){
Expression( code, ref at );
Args.Add( Result );
}
Value = create ? new Value( fn.Create( argc ) ) : fn.Call( self, argc );
Args.Remove( argc );
return;
case Opcode.Index:
case Opcode.Mindex:
n = op == Opcode.Index ? 2 : code[at++];
Expression( code, ref at );
self = null;
if( Value.Type == Vtype.Ident )
{
self = Value.Ptr as Obj;
Value = ((IProps)Value.Ptr).Get( Value.Str );
}
fn = Box( Value );
argc = n - 1;
while( (--n) > 0 ){
Expression( code, ref at );
Args.Add( Result );
}
Value = fn.Index( self, argc );
Args.Remove( argc );
return;
case Opcode.Var:
var ident = Cident( code, ref at );
Typeref( code, ref at );
if( Value.Type == Vtype.Undef )
{
Expression( code, ref at );
Ctx.Vars.Set( ident, Value );
return;
}
fn = Box( Value );
Expression( code, ref at );
Args.Add( Result );
Value = fn.Call( null, 1 );
Args.Remove( 1 );
Ctx.Vars.Set( ident, Value );
return;
case Opcode.Dot:
Expression( code, ref at );
fn = Box( Value );
ident = Cident( code, ref at );
Value = new Value( fn, ident );
return;
case Opcode.Ternary:
Expression( code, ref at );
if( Result.Bool )
{
at += 4;
Expression( code, ref at );
var fsz = Cint( code, ref at );
at += fsz;
}
else
{
var tsz = Cint( code, ref at );
at += tsz;
at += 4;
Expression( code, ref at );
}
return;
}
throw new NotImplementedException();
}//Special
}//.ctor
public Value( Value value )
{
Vt = value.Vt;
Ptr = value.Ptr;
Str = value.Str;
Dta = value.Dta;
}//.ctor
}//Statement
protected override void Other( Opcode op, byte[] code, ref int at )
{
switch( op )
{
default:
throw new NotImplementedException();
case Opcode.Func:
var size = Cint( code, ref at );
var body = at + size;
at += 2;
var argc = code[at++];
var fname = Cident( code, ref at );
var ftsz = Cint( code, ref at );
var ftat = at;
at += ftsz;
var args = argc == 0 ? null : new ArgInfo[argc];
for( var i = 0; i < argc; i++ )
{
var asz = Cint( code, ref at );
var aend = at + asz;
args[i].Name = Cident( code, ref at );
var tsz = Cint( code, ref at );
args[i].Type = at;
at += tsz;
var vsz = Cint( code, ref at );
args[i].Value = at;
Debug.Assert( (at + vsz) == aend );
at = aend;
}
Debug.Assert( at == body );
at = body;
size = Cint( code, ref at );
Ctx.Root.Set( fname, new Value( Root.Create( code, at, size, ftat, args, null, Ctx.Vars ) ) );
at += size;
Value = new Value( Vtype.Ident, Ctx.Root, fname );
return;
}
}//Other
}//Identical
public static bool Identical( Value lhs, Value rhs )
{
if( lhs.Vt == Vtype.Ident )
{
lhs = ((IProps)lhs.Ptr).Get( lhs.Str );
}
if( rhs.Vt == Vtype.Ident )
{
rhs = ((IProps)rhs.Ptr).Get( rhs.Str );
}
return (((lhs.Vt == rhs.Vt) && (lhs.Ptr == rhs.Ptr)) && (lhs.Str == rhs.Str)) && (lhs.Dta.Long == rhs.Dta.Long);
}//Identical
}//>=
public bool Identical( Value rhs )
{
return Identical( this, rhs );
}//Identical
}//ShiftRight
public static Value ShiftRight( Value lhs, Value rhs )
{
if( lhs.Vt == Vtype.Ident )
{
lhs = ((IProps)lhs.Ptr).Get( lhs.Str );
}
if( rhs.Vt == Vtype.Ident )
{
rhs = ((IProps)rhs.Ptr).Get( rhs.Str );
}
if( lhs.Isnum && rhs.Isnum )
{
if( lhs.Isfp || rhs.Isfp )
{
return new Value( lhs.Long >> rhs.Int );
}
if( lhs.Is64 || rhs.Is64 )
{
return new Value( lhs.Is64 ? lhs.Vt : rhs.Vt, lhs.Long >> rhs.Int );
}
if( lhs.Signed )
{
if( rhs.Signed || (rhs.Numsz < 4) )
{
return new Value( lhs.Int >> rhs.Int );
}
return new Value( lhs.Long >> rhs.Int );
}
if( (!rhs.Signed) || (rhs.Numsz < 4) )
{
return new Value( lhs.Uint >> rhs.Int );
}
return new Value( lhs.Ulong >> rhs.Int );
}
return new Value();
}//ShiftRight
}//ShiftLeft
public Value ShiftRight( Value by )
{
return ShiftLeft( this, by );
}//ShiftRight
