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annotate src/luan/interp/LuaClosure.java @ 31:5cf15507d77e

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separate interpreter from interface git-svn-id: https://luan-java.googlecode.com/svn/trunk@32 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 13 Dec 2012 02:50:04 +0000
parents src/luan/LuaClosure.java@7ee247560db5
children c3eab5a3ce3c
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 24
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1 package luan.interp;
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3 import luan.LuaFunction;
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4 import luan.LuaState;
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5 import luan.LuaException;
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8 final class LuaClosure extends LuaFunction {
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9 private final Chunk chunk;
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11 LuaClosure(Chunk chunk,LuaStateImpl lua) {
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12 this.chunk = chunk;
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13 }
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15 public Object[] call(LuaState luaState,Object... args) throws LuaException {
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16 LuaStateImpl lua = (LuaStateImpl)luaState;
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17 Chunk chunk = this.chunk;
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18 while(true) {
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19 Object[] varArgs = null;
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20 if( chunk.isVarArg ) {
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21 if( args.length > chunk.numArgs ) {
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22 varArgs = new Object[ args.length - chunk.numArgs ];
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23 for( int i=0; i<varArgs.length; i++ ) {
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24 varArgs[i] = args[chunk.numArgs+i];
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25 }
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26 } else {
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27 varArgs = LuaFunction.EMPTY_RTN;
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28 }
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29 }
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30 Object[] stack = lua.newStack(chunk.stackSize,varArgs);
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31 final int n = Math.min(args.length,chunk.numArgs);
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32 for( int i=0; i<n; i++ ) {
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33 stack[i] = args[i];
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34 }
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35 Object[] returnValues;
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36 LuaClosure tailFn;
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37 try {
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38 chunk.block.eval(lua);
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39 } catch(ReturnException e) {
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40 } finally {
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41 returnValues = lua.returnValues;
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42 tailFn = lua.tailFn;
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43 lua.popStack();
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44 }
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45 if( tailFn == null )
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46 return returnValues;
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47 chunk = tailFn.chunk;
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48 args = returnValues;
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49 }
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50 }
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52 }