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comparison src/luan/Lua.java @ 2:4da26b11d12a

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start interp git-svn-id: https://luan-java.googlecode.com/svn/trunk@3 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 14 Nov 2012 08:53:25 +0000
parents 2df768b926aa
children 7a2cdbc5767f
comparison
equal deleted inserted replaced
1:2df768b926aa 2:4da26b11d12a
1 package luan; 1 package luan;
2 2
3 3
4 public class Lua { 4 public class Lua {
5
6 public static String toString(Object obj) {
7 if( obj == null )
8 return "nil";
9 return obj.toString();
10 }
11 5
12 public static String type(Object obj) { 6 public static String type(Object obj) {
13 if( obj == null ) 7 if( obj == null )
14 return "nil"; 8 return "nil";
15 if( obj instanceof String ) 9 if( obj instanceof String )
19 if( obj instanceof LuaNumber ) 13 if( obj instanceof LuaNumber )
20 return "number"; 14 return "number";
21 return "userdata"; 15 return "userdata";
22 } 16 }
23 17
24 public static int length(Object obj) throws LuaException { 18 public static String toString(Object obj) {
25 if( obj instanceof String ) { 19 if( obj == null )
26 String s = (String)obj; 20 return "nil";
27 return s.length(); 21 return obj.toString();
28 }
29 if( obj instanceof LuaTable ) {
30 LuaTable t = (LuaTable)obj;
31 return t.length();
32 }
33 throw new LuaException( "attempt to get length of a " + type(obj) + " value" );
34 } 22 }
35 23
36 static LuaNumber toNumber(Object obj) throws LuaException { 24 public static LuaNumber toNumber(Object obj) throws LuaException {
37 if( obj instanceof LuaNumber ) 25 if( obj instanceof LuaNumber )
38 return (LuaNumber)obj; 26 return (LuaNumber)obj;
39 if( obj instanceof String ) { 27 if( obj instanceof String ) {
40 String s = (String)obj; 28 String s = (String)obj;
41 try { 29 try {
43 } catch(NumberFormatException e) {} 31 } catch(NumberFormatException e) {}
44 } 32 }
45 throw new LuaException( "attempt to perform arithmetic on a " + type(obj) + " value" ); 33 throw new LuaException( "attempt to perform arithmetic on a " + type(obj) + " value" );
46 } 34 }
47 35
48 static LuaNumber add(Object n1,Object n2) throws LuaException { 36 public static LuaFunction toFunction(Object obj) throws LuaException {
49 return new LuaNumber( toNumber(n1).n + toNumber(n2).n ); 37 if( obj instanceof LuaFunction )
50 } 38 return (LuaFunction)obj;
51 39 throw new LuaException( "attempt to call a " + type(obj) + " value" );
52 static LuaNumber sub(Object n1,Object n2) throws LuaException {
53 return new LuaNumber( toNumber(n1).n - toNumber(n2).n );
54 } 40 }
55 41
56 } 42 }