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Fixes to get dwt to work with dmd and ldc
author Jacob Carlborg <doob@me.com>
date Wed, 08 Jul 2009 21:56:44 +0200
parents db5a898b2119
children
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1 /*
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2 * @(#)BufferedInputStream.java 1.50 04/05/03
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3 *
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4 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
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5 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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6 *
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7 * Port to the D programming language:
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8 * Jacob Carlborg <jacob.carlborg@gmail.com>
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9 */
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10 module dwt.dwthelper.BufferedOutputStream;
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11
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12 import tango.core.Exception;
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13
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14 import dwt.dwthelper.OutputStream;
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15 import dwt.dwthelper.System;
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16
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17 /**
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18 * The class : a buffered output stream. By setting up such
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19 * an output stream, an application can write bytes to the underlying
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20 * output stream without necessarily causing a call to the underlying
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21 * system for each byte written.
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22 *
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23 * Authors: Arthur van Hoff, Jacob Carlborg
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24 * Version: 1.33, 12/19/03
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25 * Since: JDK1.0
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26 */
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27 class BufferedOutputStream : OutputStream
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28 {
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29 /// The internal buffer where data is stored.
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30 protected byte buf[];
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31
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32 /**
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33 * The number of valid bytes in the buffer. This value is always
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34 * in the range <tt>0</tt> through <tt>buf.length</tt>; elements
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35 * <tt>buf[0]</tt> through <tt>buf[count-1]</tt> contain valid
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36 * byte data.
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37 */
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38 protected int count;
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39
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40 /**
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41 * Creates a new buffered output stream to write data to the
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42 * specified underlying output stream.
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43 *
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44 * Params:
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45 * ostr = the underlying output stream.
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46 */
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47 public this (OutputStream ostr)
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48 {
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49 this(ostr, 8192);
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50 }
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51
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52 /**
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53 * Creates a new buffered output stream to write data to the
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54 * specified underlying output stream with the specified buffer
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55 * size.
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56 *
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57 * Params:
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58 * ostr = the underlying output stream
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59 * size = the buffer size.
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60 *
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61 * Throws: IllegalArgumentException if size &lt;= 0.
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62 */
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63 public this (OutputStream ostr, int size)
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64 {
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65 super(ostr);
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66
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67 if (size <= 0)
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68 throw new IllegalArgumentException("Buffer size <= 0");
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69
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70 buf = new byte[size];
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71 }
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72
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73 /**
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74 * Flush the internal buffer
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75 *
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76 * Throws: IOException
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77 */
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78 private void flushBuffer ()
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79 {
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80 if (count > 0)
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81 {
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82 write(buf, 0, count);
0
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83 count = 0;
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84 }
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85 }
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86
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87 /**
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88 * Writes the specified byte to this buffered output stream.
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89 *
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90 * Params:
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91 * b = he byte to be written.
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92 *
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93 * Throws: IOException if an I/O error occurs.
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94 */
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95 public synchronized void write (int b)
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96 {
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97 if (count >= buf.length)
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98 flushBuffer();
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99
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100 buf[count] = cast(byte) b;
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101 count++;
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102 }
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103
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104 /**
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105 * Writes $(D_CODE len) bytes from the specified byte array
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106 * starting at offset $(D_CODE off) to this buffered output stream.
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107 *
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108 * $(P Ordinarily this method stores bytes from the given array into this
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109 * stream's buffer, flushing the buffer to the underlying output stream as
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110 * needed. If the requested length is at least as large as this stream's
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111 * buffer, however, then this method will flush the buffer and write the
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112 * bytes directly to the underlying output stream. Thus redundant
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113 * $(D_CODE BufferedOutputStream)s will not copy data unnecessarily.)
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114 *
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115 * Params:
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116 * b = the data
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117 * off = the start offset in the data
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118 * len = the number of bytes to write
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119 *
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120 * Throws: IOException if an I/O error occurs
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121 */
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122 public synchronized void write (byte b[], int off, int len)
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123 {
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124 if (len >= buf.length)
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125 {
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126 /* If the request length exceeds the size of the output buffer,
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127 flush the output buffer and then write the data directly.
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128 In this way buffered streams will cascade harmlessly. */
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129 flushBuffer();
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130 write(b, off, len);
0
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131 return;
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132 }
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133
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134 if (len > buf.length - count)
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135 flushBuffer();
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136
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137 System.arraycopy(b, off, buf, count, len);
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138 count += len;
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139 }
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140
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141 /**
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142 *
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143 * Flushes this buffered output stream. This forces any buffered
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144 * output bytes to be written out to the underlying output stream.
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145 *
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146 * Throws: IOException if an I/O error occurs
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147 * See_Also: java.io.FilterOutputStream#out
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148 */
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149 public synchronized void flush ()
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150 {
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151 flushBuffer();
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152 ostr.flush();
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153 }
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154 }