Mercurial Hosting > luan
annotate core/src/luan/impl/LuanStateImpl.java @ 651:140cc5191b7a
start compiling statements
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 01 Apr 2016 17:24:44 -0600 |
parents | 8e8c30b72e9b |
children | 067d9470184d |
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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.DeepCloner; |
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13 |
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14 |
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15 public final class LuanStateImpl extends LuanState { |
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16 |
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17 private static class Frame { |
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18 final Frame previousFrame; |
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19 final Closure closure; |
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20 final Object[] stack; |
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21 final Object[] varArgs; |
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22 UpValue[] downValues = null; |
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23 |
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24 Frame( Frame previousFrame, Closure closure, int stackSize, Object[] varArgs) { |
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25 this.previousFrame = previousFrame; |
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26 this.closure = closure; |
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27 this.stack = new Object[stackSize]; |
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28 this.varArgs = varArgs; |
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29 } |
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30 |
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31 void stackClear(int start,int end) { |
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32 if( downValues != null ) { |
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33 for( int i=start; i<end; i++ ) { |
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34 UpValue downValue = downValues[i]; |
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35 if( downValue != null ) { |
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36 downValue.close(); |
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37 downValues[i] = null; |
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38 } |
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39 } |
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40 } |
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41 for( int i=start; i<end; i++ ) { |
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42 stack[i] = null; |
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43 } |
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44 } |
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45 |
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46 UpValue getUpValue(int index) { |
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47 if( downValues==null ) |
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48 downValues = new UpValue[stack.length]; |
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49 if( downValues[index] == null ) |
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50 downValues[index] = new UpValue(stack,index); |
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51 return downValues[index]; |
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52 } |
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53 } |
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54 |
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55 private Frame frame = null; |
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56 Object returnValues; |
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57 Closure tailFn; |
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58 |
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59 LuanStateImpl() {} |
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60 |
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61 private LuanStateImpl(LuanStateImpl luan) { |
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62 super(luan); |
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63 } |
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64 |
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65 @Override public LuanState shallowClone() { |
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66 // if( frame != null ) |
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67 // throw new IllegalStateException("frame isn't null"); |
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68 return new LuanStateImpl(this); |
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69 } |
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70 |
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71 // returns stack |
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72 Object[] newFrame(Closure closure, int stackSize, Object[] varArgs) { |
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73 returnValues = LuanFunction.NOTHING; |
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74 tailFn = null; |
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75 frame = new Frame(frame,closure,stackSize,varArgs); |
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76 return frame.stack; |
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77 } |
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78 |
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79 void popFrame() { |
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80 returnValues = LuanFunction.NOTHING; |
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81 tailFn = null; |
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82 frame = frame.previousFrame; |
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83 } |
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84 |
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85 Object stackGet(int index) { |
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86 return frame.stack[index]; |
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87 } |
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88 |
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89 void stackSet(int index,Object value) { |
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90 frame.stack[index] = value; |
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91 } |
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92 |
651
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93 public void stackClear(int start,int end) { |
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94 frame.stackClear(start,end); |
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95 } |
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96 |
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97 Object[] varArgs() { |
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98 return frame.varArgs; |
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99 } |
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100 |
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101 Closure closure() { |
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102 return frame.closure; |
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103 } |
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104 |
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105 UpValue getUpValue(int index) { |
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106 return frame.getUpValue(index); |
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107 } |
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108 |
503 | 109 @Override public boolean hasJava() { |
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110 if( frame==null ) |
503 | 111 return false; |
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112 return ((LuanTable)frame.closure.upValues()[0].get()).hasJava; |
503 | 113 } |
114 | |
115 @Override public void setJava() { | |
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116 ((LuanTable)frame.closure.upValues()[0].get()).hasJava = true; |
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117 } |
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118 |
579 | 119 |
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120 } |