annotate src/org/eclipse/jetty/io/BufferUtil.java @ 1047:1accf965d51a

remove other Buffer implementations
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 07 Nov 2016 22:51:09 -0700
parents a8c92b0a08ed
children 2b769da7f67d
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rev   line source
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.io;
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20
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21 import java.nio.ByteBuffer;
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22 import org.eclipse.jetty.io.nio.NIOBuffer;
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23 import org.eclipse.jetty.util.StringUtil;
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24
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25
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26 /* ------------------------------------------------------------------------------- */
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27 /** Buffer utility methods.
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28 *
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29 *
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30 */
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31 public final class BufferUtil
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32 {
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33 static final byte SPACE= 0x20;
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34 static final byte MINUS= '-';
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35 static final byte[] DIGIT=
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36 {(byte)'0',(byte)'1',(byte)'2',(byte)'3',(byte)'4',(byte)'5',(byte)'6',(byte)'7',(byte)'8',(byte)'9',(byte)'A',(byte)'B',(byte)'C',(byte)'D',(byte)'E',(byte)'F'};
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37
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38 /**
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39 * Convert buffer to an integer.
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40 * Parses up to the first non-numeric character. If no number is found an
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41 * IllegalArgumentException is thrown
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42 * @param buffer A buffer containing an integer. The position is not changed.
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43 * @return an int
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44 */
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45 public static int toInt(Buffer buffer)
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46 {
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47 int val= 0;
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48 boolean started= false;
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49 boolean minus= false;
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50 for (int i= buffer.getIndex(); i < buffer.putIndex(); i++)
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51 {
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52 byte b= buffer.peek(i);
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53 if (b <= SPACE)
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54 {
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55 if (started)
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56 break;
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57 }
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58 else if (b >= '0' && b <= '9')
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59 {
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60 val= val * 10 + (b - '0');
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61 started= true;
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62 }
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63 else if (b == MINUS && !started)
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64 {
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65 minus= true;
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66 }
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67 else
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68 break;
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69 }
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70
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71 if (started)
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72 return minus ? (-val) : val;
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73 throw new NumberFormatException(buffer.toString());
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74 }
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75
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76 /**
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77 * Convert string to an long.
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78 * Parses up to the first non-numeric character. If no number is found an
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79 * IllegalArgumentException is thrown
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80 */
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81 public static long toLong(String s)
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82 {
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83 long val = 0;
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84 boolean started= false;
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85 boolean minus= false;
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86 for (int i = 0; i < s.length(); i++)
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87 {
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88 char c = s.charAt(i);
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89 if (c <= ' ')
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90 {
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91 if (started)
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92 break;
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93 }
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94 else if (c >= '0' && c <= '9')
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95 {
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96 val= val * 10L + (c - '0');
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97 started= true;
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98 }
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99 else if (c == '-' && !started)
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100 {
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101 minus= true;
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102 }
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103 else
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104 break;
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105 }
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106
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107 if (started)
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108 return minus ? (-val) : val;
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109 throw new NumberFormatException(s);
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110 }
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111
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112 public static void putHexInt(Buffer buffer, int n)
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113 {
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114
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115 if (n < 0)
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116 {
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117 buffer.put((byte)'-');
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118
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119 if (n == Integer.MIN_VALUE)
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120 {
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121 buffer.put((byte)(0x7f&'8'));
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122 buffer.put((byte)(0x7f&'0'));
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123 buffer.put((byte)(0x7f&'0'));
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124 buffer.put((byte)(0x7f&'0'));
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125 buffer.put((byte)(0x7f&'0'));
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126 buffer.put((byte)(0x7f&'0'));
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127 buffer.put((byte)(0x7f&'0'));
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128 buffer.put((byte)(0x7f&'0'));
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129
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130 return;
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131 }
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132 n= -n;
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133 }
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134
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135 if (n < 0x10)
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136 {
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137 buffer.put(DIGIT[n]);
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138 }
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139 else
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140 {
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141 boolean started= false;
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142 // This assumes constant time int arithmatic
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143 for (int i= 0; i < hexDivisors.length; i++)
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144 {
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145 if (n < hexDivisors[i])
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146 {
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147 if (started)
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148 buffer.put((byte)'0');
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149 continue;
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150 }
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151
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152 started= true;
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153 int d= n / hexDivisors[i];
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154 buffer.put(DIGIT[d]);
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155 n= n - d * hexDivisors[i];
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156 }
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157 }
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158 }
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159
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160 /* ------------------------------------------------------------ */
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161 /**
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162 * Add hex integer BEFORE current getIndex.
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163 * @param buffer
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164 * @param n
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165 */
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166 public static void prependHexInt(Buffer buffer, int n)
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167 {
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168 if (n==0)
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169 {
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170 int gi=buffer.getIndex();
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171 buffer.poke(--gi,(byte)'0');
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172 buffer.setGetIndex(gi);
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173 }
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174 else
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175 {
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176 boolean minus=false;
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177 if (n<0)
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178 {
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179 minus=true;
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180 n=-n;
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181 }
802
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182
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183 int gi=buffer.getIndex();
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184 while(n>0)
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185 {
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186 int d = 0xf&n;
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187 n=n>>4;
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188 buffer.poke(--gi,DIGIT[d]);
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189 }
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190
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191 if (minus)
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192 buffer.poke(--gi,(byte)'-');
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193 buffer.setGetIndex(gi);
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194 }
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195 }
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196
802
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197
1018
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198 public static void putDecLong(Buffer buffer, long n)
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199 {
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200 if (n < 0)
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201 {
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202 buffer.put((byte)'-');
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203
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204 if (n == Long.MIN_VALUE)
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205 {
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206 buffer.put((byte)'9');
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207 n= 223372036854775808L;
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208 }
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209 else
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210 n= -n;
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211 }
802
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212
1018
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213 if (n < 10)
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214 {
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215 buffer.put(DIGIT[(int)n]);
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216 }
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217 else
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218 {
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219 boolean started= false;
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220 // This assumes constant time int arithmatic
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221 for (int i= 0; i < decDivisorsL.length; i++)
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222 {
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223 if (n < decDivisorsL[i])
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224 {
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225 if (started)
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226 buffer.put((byte)'0');
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227 continue;
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228 }
802
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229
1018
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230 started= true;
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231 long d= n / decDivisorsL[i];
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232 buffer.put(DIGIT[(int)d]);
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233 n= n - d * decDivisorsL[i];
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234 }
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235 }
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236 }
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237
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238 private final static int[] hexDivisors=
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239 {
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240 0x10000000,
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diff changeset
241 0x1000000,
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242 0x100000,
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243 0x10000,
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244 0x1000,
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245 0x100,
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246 0x10,
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247 0x1
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248 };
802
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249
1018
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250 private final static long[] decDivisorsL=
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251 {
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252 1000000000000000000L,
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diff changeset
253 100000000000000000L,
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diff changeset
254 10000000000000000L,
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diff changeset
255 1000000000000000L,
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diff changeset
256 100000000000000L,
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diff changeset
257 10000000000000L,
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diff changeset
258 1000000000000L,
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diff changeset
259 100000000000L,
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diff changeset
260 10000000000L,
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diff changeset
261 1000000000L,
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diff changeset
262 100000000L,
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diff changeset
263 10000000L,
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diff changeset
264 1000000L,
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diff changeset
265 100000L,
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diff changeset
266 10000L,
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267 1000L,
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268 100L,
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269 10L,
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270 1L
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271 };
802
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272
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273
1018
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274 public static void putCRLF(Buffer buffer)
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275 {
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276 buffer.put((byte)13);
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277 buffer.put((byte)10);
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278 }
1021
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diff changeset
279
1046
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280
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281 public static final NIOBuffer EMPTY_BUFFER = new JBuffer(ByteBuffer.allocate(0));
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282
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283 public static NIOBuffer wrap(byte[] array,int offset,int length) {
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284 return new JBuffer(ByteBuffer.wrap(array,offset,length));
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285 }
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286
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287 public static NIOBuffer wrap(byte[] array) {
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288 return new JBuffer(ByteBuffer.wrap(array));
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289 }
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290
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291 public static NIOBuffer wrap(String s) {
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292 byte[] bytes = StringUtil.getBytes(s);
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293 ByteBuffer bb = ByteBuffer.wrap(bytes).asReadOnlyBuffer();
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294 return new JBuffer(bb);
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295 }
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296
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297 public static NIOBuffer newBuffer(int size) {
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298 ByteBuffer bb = ByteBuffer.allocate(size);
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299 bb.limit(0);
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300 return new JBuffer(bb);
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301 }
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diff changeset
302
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diff changeset
303 public static NIOBuffer newDirectBuffer(int size) {
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304 ByteBuffer bb = ByteBuffer.allocateDirect(size);
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305 bb.limit(0);
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306 return new JBuffer(bb);
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307 }
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308
802
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diff changeset
309 }