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annotate src/luan/LuaClosure.java @ 24:7ee247560db5

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add VarArgs git-svn-id: https://luan-java.googlecode.com/svn/trunk@25 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 06 Dec 2012 04:40:54 +0000
parents 1e37f22a34c8
children
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan;
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3 import luan.interp.Chunk;
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4 import luan.interp.ReturnException;
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7 public final class LuaClosure extends LuaFunction {
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8 private final Chunk chunk;
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10 public LuaClosure(Chunk chunk,LuaState lua) {
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11 this.chunk = chunk;
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12 }
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14 public Object[] call(LuaState lua,Object... args) throws LuaException {
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15 Chunk chunk = this.chunk;
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16 while(true) {
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17 Object[] varArgs = null;
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18 if( chunk.isVarArg ) {
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19 if( args.length > chunk.numArgs ) {
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20 varArgs = new Object[ args.length - chunk.numArgs ];
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21 for( int i=0; i<varArgs.length; i++ ) {
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22 varArgs[i] = args[chunk.numArgs+i];
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23 }
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24 } else {
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25 varArgs = LuaFunction.EMPTY_RTN;
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26 }
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27 }
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28 Object[] stack = lua.newStack(chunk.stackSize,varArgs);
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29 final int n = Math.min(args.length,chunk.numArgs);
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30 for( int i=0; i<n; i++ ) {
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31 stack[i] = args[i];
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32 }
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33 Object[] returnValues;
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34 LuaClosure tailFn;
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35 try {
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36 chunk.block.eval(lua);
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37 } catch(ReturnException e) {
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38 } finally {
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39 returnValues = lua.returnValues;
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40 tailFn = lua.tailFn;
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41 lua.popStack();
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42 }
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43 if( tailFn == null )
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44 return returnValues;
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45 chunk = tailFn.chunk;
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46 args = returnValues;
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47 }
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48 }
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50 }