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annotate src/luan/interp/LuaStateImpl.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/LuaState.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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parents: 24
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3 import luan.LuaState;
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4 import luan.LuaTable;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 24
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5 import luan.LuaFunction;
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8 final class LuaStateImpl implements LuaState {
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9 private final LuaTable env = new LuaTable();
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11 public LuaTable env() {
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12 return env;
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13 }
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16 private static class LuaStack {
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17 final LuaStack previousStack;
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18 final Object[] a;
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19 final Object[] varArgs;
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21 LuaStack( LuaStack previousStack, int stackSize, Object[] varArgs) {
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22 this.previousStack = previousStack;
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23 this.a = new Object[stackSize];
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24 this.varArgs = varArgs;
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25 }
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26 }
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28 private LuaStack stack = null;
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29 public Object[] returnValues;
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30 public LuaClosure tailFn;
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32 Object[] newStack(int stackSize, Object[] varArgs) {
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33 stack = new LuaStack(stack,stackSize,varArgs);
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34 return stack.a;
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35 }
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37 void popStack() {
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38 returnValues = LuaFunction.EMPTY_RTN;
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39 tailFn = null;
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40 stack = stack.previousStack;
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41 }
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43 public Object[] stack() {
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44 return stack.a;
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45 }
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47 public Object[] varArgs() {
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48 return stack.varArgs;
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49 }
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50 }