Mercurial Hosting > luan
annotate core/src/luan/modules/BinaryLuan.java @ 360:cbb94a7c7a9e
allow mail attachments;
add String.to_binary and Binary.to_string;
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 15 Apr 2015 11:32:30 -0600 |
parents | 5e7450ac27f2 |
children | d55e873e1f0d |
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1 package luan.modules; |
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2 |
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3 import luan.Luan; |
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4 import luan.LuanState; |
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5 import luan.LuanTable; |
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6 import luan.LuanFunction; |
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7 import luan.LuanException; |
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8 import luan.LuanMethod; |
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9 |
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10 |
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11 public final class BinaryLuan { |
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12 |
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13 public static Object __index(LuanState luan,final byte[] binary,Object key) throws LuanException { |
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14 LuanTable mod = (LuanTable)PackageLuan.loaded(luan).get("luan:Binary"); |
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15 if( mod!=null ) { |
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16 Object obj = mod.get(key); |
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17 if( obj instanceof LuanFunction ) { |
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18 final LuanFunction fn = (LuanFunction)obj; |
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19 return new LuanFunction() { |
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20 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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21 Object[] a = new Object[args.length+1]; |
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22 a[0] = binary; |
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23 System.arraycopy(args,0,a,1,args.length); |
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24 return fn.call(luan,a); |
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25 } |
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26 }; |
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27 } |
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28 } |
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29 return null; |
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30 } |
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31 |
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32 static int start(byte[] binary,int i) { |
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33 int len = binary.length; |
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34 return i==0 ? 0 : i > 0 ? Math.min(i-1,len) : Math.max(len+i,0); |
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35 } |
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36 |
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37 static int start(byte[] binary,Integer i,int dflt) { |
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38 return i==null ? dflt : start(binary,i); |
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39 } |
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40 |
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41 static int end(byte[] binary,int i) { |
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42 int len = binary.length; |
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43 return i==0 ? 0 : i > 0 ? Math.min(i,len) : Math.max(len+i+1,0); |
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44 } |
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45 |
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46 static int end(byte[] binary,Integer i,int dflt) { |
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47 return i==null ? dflt : end(binary,i); |
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48 } |
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49 |
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50 @LuanMethod public static Byte[] byte_(LuanState luan,byte[] binary,Integer i,Integer j) throws LuanException { |
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51 Utils.checkNotNull(luan,binary); |
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52 int start = start(binary,i,1); |
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53 int end = end(binary,j,start+1); |
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54 Byte[] bytes = new Byte[end-start]; |
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55 for( int k=0; k<bytes.length; k++ ) { |
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56 bytes[k] = binary[start+k]; |
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57 } |
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58 return bytes; |
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59 } |
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60 |
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61 @LuanMethod public static byte[] binary(byte... bytes) { |
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62 return bytes; |
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63 } |
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64 |
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65 public static String to_string(byte[] binary) { |
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66 return new String(binary); |
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67 } |
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68 |
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69 } |