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annotate core/src/luan/impl/LuanStateImpl.java @ 533:8e51d6071b67

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restore LuanTable.hasJava
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 27 May 2015 23:40:09 -0600
parents 92c3d22745b8
children f22a09e98b04
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
1 package luan.impl;
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2
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3 import java.util.List;
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4 import java.util.ArrayList;
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5 import java.util.Map;
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6 import java.util.HashMap;
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7 import luan.Luan;
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8 import luan.LuanState;
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9 import luan.LuanTable;
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10 import luan.LuanFunction;
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11 import luan.LuanException;
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12 import luan.LuanElement;
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13 import luan.LuanSource;
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14 import luan.DeepCloner;
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15
7a2cdbc5767f add LuaState
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17 final class LuanStateImpl extends LuanState {
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18
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19 private static class Frame {
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20 final Frame previousFrame;
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21 final Closure closure;
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22 final Object[] stack;
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23 final Object[] varArgs;
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24 UpValue[] downValues = null;
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26 Frame( Frame previousFrame, Closure closure, int stackSize, Object[] varArgs) {
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27 this.previousFrame = previousFrame;
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28 this.closure = closure;
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29 this.stack = new Object[stackSize];
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30 this.varArgs = varArgs;
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31 }
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33 void stackClear(int start,int end) {
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34 if( downValues != null ) {
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35 for( int i=start; i<end; i++ ) {
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36 UpValue downValue = downValues[i];
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37 if( downValue != null ) {
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38 downValue.close();
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39 downValues[i] = null;
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40 }
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41 }
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42 }
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43 for( int i=start; i<end; i++ ) {
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44 stack[i] = null;
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45 }
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46 }
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48 UpValue getUpValue(int index) {
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49 if( downValues==null )
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50 downValues = new UpValue[stack.length];
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51 if( downValues[index] == null )
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52 downValues[index] = new UpValue(stack,index);
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53 return downValues[index];
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54 }
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55 }
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56
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57 private Frame frame = null;
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58 Object returnValues;
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59 Closure tailFn;
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60
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61 LuanStateImpl() {}
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62
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63 private LuanStateImpl(LuanStateImpl luan) {
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64 super(luan);
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65 }
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66
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67 @Override public LuanState shallowClone() {
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68 // if( frame != null )
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69 // throw new IllegalStateException("frame isn't null");
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70 return new LuanStateImpl(this);
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71 }
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72
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73 // returns stack
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74 Object[] newFrame(Closure closure, int stackSize, Object[] varArgs) {
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75 returnValues = LuanFunction.NOTHING;
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76 tailFn = null;
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77 frame = new Frame(frame,closure,stackSize,varArgs);
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78 return frame.stack;
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79 }
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81 void popFrame() {
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82 returnValues = LuanFunction.NOTHING;
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83 tailFn = null;
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84 frame = frame.previousFrame;
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85 }
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86
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87 Object stackGet(int index) {
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88 return frame.stack[index];
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89 }
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90
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91 void stackSet(int index,Object value) {
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92 frame.stack[index] = value;
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93 }
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95 void stackClear(int start,int end) {
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96 frame.stackClear(start,end);
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97 }
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98
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99 Object[] varArgs() {
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100 return frame.varArgs;
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101 }
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102
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103 Closure closure() {
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104 return frame.closure;
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105 }
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106
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107 UpValue getUpValue(int index) {
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108 return frame.getUpValue(index);
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109 }
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110
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111 @Override public boolean hasJava() {
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112 if( frame==null )
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113 return false;
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114 return ((LuanTable)frame.closure.upValues()[0].get()).hasJava;
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115 }
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116
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117 @Override public void setJava() {
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118 ((LuanTable)frame.closure.upValues()[0].get()).hasJava = true;
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119 }
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120
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121 @Override public LuanSource currentSource(){
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122 if( frame==null )
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123 return null;
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124 return frame.closure.fnDef.el().source;
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125 }
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126
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127 }