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annotate core/src/luan/modules/BinaryLuan.java @ 576:4723d22062ce

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remove LuanBit
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 13 Jul 2015 20:38:26 -0600
parents 473e456444ff
children cdc70de628b5
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4c0131c2b650 merge luan/lib into modules
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.modules;
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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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11 public final class BinaryLuan {
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13 static int start(byte[] binary,int i) {
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14 int len = binary.length;
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15 return i==0 ? 0 : i > 0 ? Math.min(i-1,len) : Math.max(len+i,0);
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16 }
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18 static int start(byte[] binary,Integer i,int dflt) {
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19 return i==null ? dflt : start(binary,i);
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20 }
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22 static int end(byte[] binary,int i) {
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23 int len = binary.length;
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24 return i==0 ? 0 : i > 0 ? Math.min(i,len) : Math.max(len+i+1,0);
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25 }
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27 static int end(byte[] binary,Integer i,int dflt) {
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28 return i==null ? dflt : end(binary,i);
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29 }
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31 @LuanMethod public static Byte[] byte_(LuanState luan,byte[] binary,Integer i,Integer j) throws LuanException {
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32 Utils.checkNotNull(luan,binary);
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33 int start = start(binary,i,1);
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34 int end = end(binary,j,start+1);
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35 Byte[] bytes = new Byte[end-start];
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36 for( int k=0; k<bytes.length; k++ ) {
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37 bytes[k] = binary[start+k];
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38 }
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39 return bytes;
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40 }
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42 @LuanMethod public static byte[] binary(byte... bytes) {
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43 return bytes;
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44 }
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46 public static String to_string(byte[] binary) {
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47 return new String(binary);
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48 }
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50 }