1 | /* |
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2 | * ByteArrayOutputStream.java |
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3 | * |
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4 | * Copyright (C) 2009 Alessio Stalla |
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5 | * $Id: ByteArrayOutputStream.java 14466 2013-04-24 12:50:40Z rschlatte $ |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 | * |
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21 | * As a special exception, the copyright holders of this library give you |
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22 | * permission to link this library with independent modules to produce an |
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23 | * executable, regardless of the license terms of these independent |
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24 | * modules, and to copy and distribute the resulting executable under |
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25 | * terms of your choice, provided that you also meet, for each linked |
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26 | * independent module, the terms and conditions of the license of that |
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27 | * module. An independent module is a module which is not derived from |
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28 | * or based on this library. If you modify this library, you may extend |
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29 | * this exception to your version of the library, but you are not |
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30 | * obligated to do so. If you do not wish to do so, delete this |
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31 | * exception statement from your version. |
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32 | */ |
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33 | |
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34 | package org.armedbear.lisp; |
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35 | |
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36 | import static org.armedbear.lisp.Lisp.*; |
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37 | |
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38 | public final class ByteArrayOutputStream extends Stream |
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39 | { |
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40 | private final java.io.ByteArrayOutputStream byteArrayOutputStream; |
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41 | |
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42 | public ByteArrayOutputStream() |
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43 | { |
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44 | this(UNSIGNED_BYTE_8); //Declared in Stream.java |
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45 | } |
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46 | |
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47 | ByteArrayOutputStream(LispObject elementType) |
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48 | { |
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49 | super(Symbol.SYSTEM_STREAM); |
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50 | this.elementType = elementType; |
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51 | initAsBinaryOutputStream(byteArrayOutputStream = new java.io.ByteArrayOutputStream(2048)); |
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52 | // based on statistics of ABCL's own .cls files |
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53 | // as per 20100111, 2048 is the 70th percentile, |
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54 | // meaning that only 30% of all .cls files is bigger |
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55 | |
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56 | // However, *every* .cls file is bigger than 32 bytes; |
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57 | // we want to prevent buffer resizing |
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58 | } |
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59 | |
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60 | @Override |
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61 | public LispObject typeOf() |
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62 | { |
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63 | return Symbol.STREAM; //TODO |
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64 | } |
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65 | |
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66 | @Override |
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67 | public LispObject classOf() |
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68 | { |
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69 | return BuiltInClass.STREAM; //TODO |
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70 | } |
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71 | |
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72 | @Override |
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73 | public LispObject typep(LispObject type) |
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74 | { |
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75 | return super.typep(type); //TODO |
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76 | } |
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77 | |
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78 | @Override |
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79 | protected long _getFilePosition() |
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80 | { |
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81 | if (elementType == NIL) |
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82 | return 0; |
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83 | return byteArrayOutputStream.size(); |
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84 | } |
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85 | |
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86 | public byte[] getByteArray() |
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87 | { |
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88 | if (elementType == NIL) { |
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89 | return new byte[0]; |
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90 | } else { |
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91 | return byteArrayOutputStream.toByteArray(); |
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92 | } |
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93 | } |
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94 | |
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95 | // ### %make-byte-array-output-stream |
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96 | // %make-byte-array-output-stream &optional element-type => byte-array-output-stream |
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97 | private static final Primitive MAKE_BYTE_ARRAY_OUTPUT_STREAM = |
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98 | new Primitive("%make-byte-array-output-stream", PACKAGE_SYS, false, |
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99 | "&optional element-type") |
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100 | { |
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101 | |
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102 | @Override |
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103 | public LispObject execute() { |
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104 | return new ByteArrayOutputStream(); |
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105 | } |
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106 | |
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107 | @Override |
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108 | public LispObject execute(LispObject arg) |
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109 | { |
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110 | return new ByteArrayOutputStream(arg); |
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111 | } |
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112 | }; |
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113 | |
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114 | // ### %get-output-stream-bytes |
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115 | // %get-output-stream-bytes byte-array-output-stream => java-byte-array |
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116 | private static final Primitive GET_OUTPUT_STREAM_STRING = |
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117 | new Primitive("%get-output-stream-bytes", PACKAGE_SYS, false, |
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118 | "byte-array-output-stream") |
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119 | { |
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120 | @Override |
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121 | public LispObject execute(LispObject arg) |
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122 | { |
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123 | if (arg instanceof ByteArrayOutputStream) { |
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124 | return JavaObject.getInstance(((ByteArrayOutputStream)arg).getByteArray()); |
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125 | } |
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126 | return type_error(this, Symbol.STREAM); //TODO |
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127 | } |
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128 | }; |
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129 | |
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130 | private static final Primitive GET_OUTPUT_STREAM_ARRAY = |
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131 | new Primitive("%get-output-stream-array", PACKAGE_SYS, false, |
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132 | "byte-array-output-stream") |
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133 | { |
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134 | @Override |
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135 | public LispObject execute(LispObject arg) |
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136 | { |
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137 | if (arg instanceof ByteArrayOutputStream) |
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138 | return new BasicVector_UnsignedByte8(((ByteArrayOutputStream)arg).getByteArray()); |
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139 | |
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140 | return type_error(this, Symbol.STREAM); // TODO |
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141 | } |
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142 | }; |
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143 | |
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144 | } |
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