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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/source/BytesDecoder.java @ 20131:4b12d5355811
Truffle: do not use iterators for visitors.
author | Christian Humer <christian.humer@gmail.com> |
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date | Thu, 02 Apr 2015 01:27:27 +0200 |
parents | 0bcefb0f8488 |
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1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.source; |
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26 |
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27 import java.nio.charset.*; |
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28 import java.util.*; |
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29 |
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30 /** |
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31 * For a language where strings do not map into Java strings, provides utilities to find line |
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32 * endings and to decode raw bytes into an approximate representation for tools to display. |
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33 * <p> |
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34 * See {@link Source#fromBytes}. |
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35 */ |
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36 public interface BytesDecoder { |
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37 |
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38 String decode(byte[] bytes, int byteIndex, int length); |
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39 |
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40 void decodeLines(byte[] bytes, int byteIndex, int length, LineMarker lineMarker); |
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41 |
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42 public interface LineMarker { |
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43 |
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44 void markLine(int index); |
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45 |
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46 } |
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47 |
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48 public static class UTF8BytesDecoder implements BytesDecoder { |
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49 |
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50 @Override |
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51 public String decode(byte[] bytes, int byteIndex, int length) { |
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52 return new String(Arrays.copyOfRange(bytes, byteIndex, byteIndex + length), StandardCharsets.UTF_8); |
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53 } |
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54 |
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55 @Override |
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56 public void decodeLines(byte[] bytes, int byteIndex, int length, LineMarker lineMarker) { |
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57 for (int n = byteIndex; n < byteIndex + length; n++) { |
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58 if (bytes[n] == '\n') { |
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59 lineMarker.markLine(n + 1); |
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60 } |
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61 } |
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62 } |
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63 |
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64 } |
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65 |
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66 } |