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view core/src/luan/impl/LuanStateImpl.java @ 564:c8d4d69c6dd4
add examples/upload-and-email.luan
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sat, 04 Jul 2015 20:57:24 -0600 |
parents | 8e51d6071b67 |
children | f22a09e98b04 |
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package luan.impl; import java.util.List; import java.util.ArrayList; import java.util.Map; import java.util.HashMap; import luan.Luan; import luan.LuanState; import luan.LuanTable; import luan.LuanFunction; import luan.LuanException; import luan.LuanElement; import luan.LuanSource; import luan.DeepCloner; final class LuanStateImpl extends LuanState { private static class Frame { final Frame previousFrame; final Closure closure; final Object[] stack; final Object[] varArgs; UpValue[] downValues = null; Frame( Frame previousFrame, Closure closure, int stackSize, Object[] varArgs) { this.previousFrame = previousFrame; this.closure = closure; this.stack = new Object[stackSize]; this.varArgs = varArgs; } void stackClear(int start,int end) { if( downValues != null ) { for( int i=start; i<end; i++ ) { UpValue downValue = downValues[i]; if( downValue != null ) { downValue.close(); downValues[i] = null; } } } for( int i=start; i<end; i++ ) { stack[i] = null; } } UpValue getUpValue(int index) { if( downValues==null ) downValues = new UpValue[stack.length]; if( downValues[index] == null ) downValues[index] = new UpValue(stack,index); return downValues[index]; } } private Frame frame = null; Object returnValues; Closure tailFn; LuanStateImpl() {} private LuanStateImpl(LuanStateImpl luan) { super(luan); } @Override public LuanState shallowClone() { // if( frame != null ) // throw new IllegalStateException("frame isn't null"); return new LuanStateImpl(this); } // returns stack Object[] newFrame(Closure closure, int stackSize, Object[] varArgs) { returnValues = LuanFunction.NOTHING; tailFn = null; frame = new Frame(frame,closure,stackSize,varArgs); return frame.stack; } void popFrame() { returnValues = LuanFunction.NOTHING; tailFn = null; frame = frame.previousFrame; } Object stackGet(int index) { return frame.stack[index]; } void stackSet(int index,Object value) { frame.stack[index] = value; } void stackClear(int start,int end) { frame.stackClear(start,end); } Object[] varArgs() { return frame.varArgs; } Closure closure() { return frame.closure; } UpValue getUpValue(int index) { return frame.getUpValue(index); } @Override public boolean hasJava() { if( frame==null ) return false; return ((LuanTable)frame.closure.upValues()[0].get()).hasJava; } @Override public void setJava() { ((LuanTable)frame.closure.upValues()[0].get()).hasJava = true; } @Override public LuanSource currentSource(){ if( frame==null ) return null; return frame.closure.fnDef.el().source; } }