Mercurial Hosting > luan

comparison core/src/luan/impl/LuanStateImpl.java @ 208:5ba136769034

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
remove MetatableGetter and use a generic metatable instead git-svn-id: https://luan-java.googlecode.com/svn/trunk@209 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 08 Jul 2014 07:04:47 +0000
parents 9fb218211763
children a6bf8ff720f8
comparison
equal deleted inserted replaced
207:5aafb5b9f70f 208:5ba136769034
6 import java.util.HashMap; 6 import java.util.HashMap;
7 import luan.Luan; 7 import luan.Luan;
8 import luan.LuanState; 8 import luan.LuanState;
9 import luan.LuanTable; 9 import luan.LuanTable;
10 import luan.LuanFunction; 10 import luan.LuanFunction;
11 import luan.MetatableGetter;
12 import luan.LuanException; 11 import luan.LuanException;
13 import luan.LuanElement; 12 import luan.LuanElement;
14 import luan.DeepCloner; 13 import luan.DeepCloner;
15 14
16 15
19 private static class Frame { 18 private static class Frame {
20 final Frame previousFrame; 19 final Frame previousFrame;
21 final Closure closure; 20 final Closure closure;
22 final Object[] stack; 21 final Object[] stack;
23 final Object[] varArgs; 22 final Object[] varArgs;
24 MtGetterLink mtGetterLink;
25 UpValue[] downValues = null; 23 UpValue[] downValues = null;
26 24
27 Frame( Frame previousFrame, Closure closure, int stackSize, Object[] varArgs) { 25 Frame( Frame previousFrame, Closure closure, int stackSize, Object[] varArgs) {
28 this.previousFrame = previousFrame; 26 this.previousFrame = previousFrame;
29 this.closure = closure; 27 this.closure = closure;
30 this.stack = new Object[stackSize]; 28 this.stack = new Object[stackSize];
31 this.varArgs = varArgs; 29 this.varArgs = varArgs;
32 this.mtGetterLink = closure.mtGetterLink();
33 } 30 }
34 31
35 void stackClear(int start,int end) { 32 void stackClear(int start,int end) {
36 if( downValues != null ) { 33 if( downValues != null ) {
37 for( int i=start; i<end; i++ ) { 34 for( int i=start; i<end; i++ ) {
52 downValues = new UpValue[stack.length]; 49 downValues = new UpValue[stack.length];
53 if( downValues[index] == null ) 50 if( downValues[index] == null )
54 downValues[index] = new UpValue(stack,index); 51 downValues[index] = new UpValue(stack,index);
55 return downValues[index]; 52 return downValues[index];
56 } 53 }
57
58 void addMetatableGetter(MetatableGetter mg) {
59 if( mtGetterLink==null || !mtGetterLink.contains(mg) )
60 mtGetterLink = new MtGetterLink(mg,mtGetterLink);
61 }
62 } 54 }
63 55
64 private Frame frame = null; 56 private Frame frame = null;
65 Object returnValues; 57 Object returnValues;
66 Closure tailFn; 58 Closure tailFn;
67 MtGetterLink mtGetterLink = null;
68 59
69 LuanStateImpl() {} 60 LuanStateImpl() {}
70 61
71 private LuanStateImpl(LuanStateImpl luan) { 62 private LuanStateImpl(LuanStateImpl luan) {
72 super(luan); 63 super(luan);
87 } 78 }
88 79
89 void popFrame() { 80 void popFrame() {
90 returnValues = LuanFunction.NOTHING; 81 returnValues = LuanFunction.NOTHING;
91 tailFn = null; 82 tailFn = null;
92 mtGetterLink = frame.mtGetterLink;
93 frame = frame.previousFrame; 83 frame = frame.previousFrame;
94 } 84 }
95 85
96 Object stackGet(int index) { 86 Object stackGet(int index) {
97 return frame.stack[index]; 87 return frame.stack[index];
121 if( frame==null ) 111 if( frame==null )
122 return null; 112 return null;
123 return (LuanTable)frame.closure.upValues()[0].get(); 113 return (LuanTable)frame.closure.upValues()[0].get();
124 } 114 }
125 115
126 MtGetterLink mtGetterLink() {
127 return frame==null ? null : frame.mtGetterLink;
128 }
129
130 @Override public LuanTable getMetatable(Object obj,MetatableGetter beforeThis) {
131 if( obj instanceof LuanTable ) {
132 LuanTable table = (LuanTable)obj;
133 return table.getMetatable();
134 }
135 MtGetterLink mtGetterLink = mtGetterLink();
136 return mtGetterLink==null ? null : mtGetterLink.getMetatable(obj,beforeThis);
137 }
138
139 @Override public void addMetatableGetter(MetatableGetter mg) {
140 frame.addMetatableGetter(mg);
141 }
142
143 } 116 }