1 /* |
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2 * Copyright (c) 2015, 2018, 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 jdk.incubator.http.internal.hpack; |
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26 |
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27 import java.io.IOException; |
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28 import java.nio.ByteBuffer; |
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29 |
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30 // |
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31 // Custom implementation of ISO/IEC 8859-1:1998 |
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32 // |
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33 // The rationale behind this is not to deal with CharsetEncoder/CharsetDecoder, |
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34 // basically because it would require wrapping every single CharSequence into a |
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35 // CharBuffer and then copying it back. |
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36 // |
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37 // But why not to give a CharBuffer instead of Appendable? Because I can choose |
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38 // an Appendable (e.g. StringBuilder) that adjusts its length when needed and |
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39 // therefore not to deal with pre-sized CharBuffers or copying. |
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40 // |
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41 // The encoding is simple and well known: 1 byte <-> 1 char |
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42 // |
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43 final class ISO_8859_1 { |
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44 |
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45 private ISO_8859_1() { } |
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46 |
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47 public static final class Reader { |
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48 |
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49 public void read(ByteBuffer source, Appendable destination) |
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50 throws IOException { |
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51 for (int i = 0, len = source.remaining(); i < len; i++) { |
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52 char c = (char) (source.get() & 0xff); |
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53 try { |
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54 destination.append(c); |
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55 } catch (IOException e) { |
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56 throw new IOException( |
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57 "Error appending to the destination", e); |
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58 } |
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59 } |
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60 } |
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61 |
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62 public Reader reset() { |
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63 return this; |
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64 } |
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65 } |
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66 |
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67 public static final class Writer { |
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68 |
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69 private CharSequence source; |
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70 private int pos; |
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71 private int end; |
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72 |
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73 public Writer configure(CharSequence source, int start, int end) { |
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74 this.source = source; |
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75 this.pos = start; |
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76 this.end = end; |
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77 return this; |
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78 } |
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79 |
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80 public boolean write(ByteBuffer destination) { |
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81 for (; pos < end; pos++) { |
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82 char c = source.charAt(pos); |
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83 if (c > '\u00FF') { |
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84 throw new IllegalArgumentException( |
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85 "Illegal ISO-8859-1 char: " + (int) c); |
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86 } |
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87 if (destination.hasRemaining()) { |
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88 destination.put((byte) c); |
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89 } else { |
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90 return false; |
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91 } |
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92 } |
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93 return true; |
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94 } |
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95 |
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96 public Writer reset() { |
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97 source = null; |
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98 pos = -1; |
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99 end = -1; |
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100 return this; |
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101 } |
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102 } |
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103 } |
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