6 * @version $Id: streams.php 1157 2015-11-20 04:30:11Z dd32 $ |
6 * @version $Id: streams.php 1157 2015-11-20 04:30:11Z dd32 $ |
7 * @package pomo |
7 * @package pomo |
8 * @subpackage streams |
8 * @subpackage streams |
9 */ |
9 */ |
10 |
10 |
11 if ( ! class_exists( 'POMO_Reader', false ) ): |
11 if ( ! class_exists( 'POMO_Reader', false ) ) : |
12 class POMO_Reader { |
12 class POMO_Reader { |
13 |
13 |
14 var $endian = 'little'; |
14 var $endian = 'little'; |
15 var $_post = ''; |
15 var $_post = ''; |
16 |
16 |
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17 /** |
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18 * PHP5 constructor. |
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19 */ |
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20 function __construct() { |
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21 $this->is_overloaded = ( ( ini_get( 'mbstring.func_overload' ) & 2 ) != 0 ) && function_exists( 'mb_substr' ); |
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22 $this->_pos = 0; |
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23 } |
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24 |
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25 /** |
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26 * PHP4 constructor. |
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27 */ |
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28 public function POMO_Reader() { |
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29 self::__construct(); |
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30 } |
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31 |
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32 /** |
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33 * Sets the endianness of the file. |
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34 * |
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35 * @param string $endian Set the endianness of the file. Accepts 'big', or 'little'. |
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36 */ |
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37 function setEndian( $endian ) { |
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38 $this->endian = $endian; |
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39 } |
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40 |
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41 /** |
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42 * Reads a 32bit Integer from the Stream |
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43 * |
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44 * @return mixed The integer, corresponding to the next 32 bits from |
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45 * the stream of false if there are not enough bytes or on error |
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46 */ |
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47 function readint32() { |
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48 $bytes = $this->read( 4 ); |
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49 if ( 4 != $this->strlen( $bytes ) ) { |
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50 return false; |
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51 } |
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52 $endian_letter = ( 'big' == $this->endian ) ? 'N' : 'V'; |
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53 $int = unpack( $endian_letter, $bytes ); |
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54 return reset( $int ); |
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55 } |
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56 |
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57 /** |
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58 * Reads an array of 32-bit Integers from the Stream |
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59 * |
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60 * @param integer $count How many elements should be read |
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61 * @return mixed Array of integers or false if there isn't |
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62 * enough data or on error |
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63 */ |
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64 function readint32array( $count ) { |
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65 $bytes = $this->read( 4 * $count ); |
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66 if ( 4 * $count != $this->strlen( $bytes ) ) { |
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67 return false; |
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68 } |
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69 $endian_letter = ( 'big' == $this->endian ) ? 'N' : 'V'; |
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70 return unpack( $endian_letter . $count, $bytes ); |
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71 } |
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72 |
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73 /** |
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74 * @param string $string |
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75 * @param int $start |
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76 * @param int $length |
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77 * @return string |
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78 */ |
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79 function substr( $string, $start, $length ) { |
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80 if ( $this->is_overloaded ) { |
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81 return mb_substr( $string, $start, $length, 'ascii' ); |
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82 } else { |
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83 return substr( $string, $start, $length ); |
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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 * @param string $string |
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89 * @return int |
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90 */ |
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91 function strlen( $string ) { |
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92 if ( $this->is_overloaded ) { |
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93 return mb_strlen( $string, 'ascii' ); |
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94 } else { |
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95 return strlen( $string ); |
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96 } |
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97 } |
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98 |
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99 /** |
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100 * @param string $string |
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101 * @param int $chunk_size |
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102 * @return array |
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103 */ |
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104 function str_split( $string, $chunk_size ) { |
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105 if ( ! function_exists( 'str_split' ) ) { |
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106 $length = $this->strlen( $string ); |
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107 $out = array(); |
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108 for ( $i = 0; $i < $length; $i += $chunk_size ) { |
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109 $out[] = $this->substr( $string, $i, $chunk_size ); |
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110 } |
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111 return $out; |
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112 } else { |
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113 return str_split( $string, $chunk_size ); |
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114 } |
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115 } |
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116 |
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117 /** |
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118 * @return int |
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119 */ |
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120 function pos() { |
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121 return $this->_pos; |
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122 } |
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123 |
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124 /** |
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125 * @return true |
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126 */ |
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127 function is_resource() { |
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128 return true; |
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129 } |
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130 |
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131 /** |
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132 * @return true |
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133 */ |
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134 function close() { |
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135 return true; |
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136 } |
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137 } |
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138 endif; |
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139 |
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140 if ( ! class_exists( 'POMO_FileReader', false ) ) : |
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141 class POMO_FileReader extends POMO_Reader { |
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142 |
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143 /** |
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144 * @param string $filename |
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145 */ |
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146 function __construct( $filename ) { |
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147 parent::POMO_Reader(); |
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148 $this->_f = fopen( $filename, 'rb' ); |
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149 } |
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150 |
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151 /** |
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152 * PHP4 constructor. |
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153 */ |
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154 public function POMO_FileReader( $filename ) { |
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155 self::__construct( $filename ); |
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156 } |
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157 |
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158 /** |
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159 * @param int $bytes |
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160 * @return string|false Returns read string, otherwise false. |
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161 */ |
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162 function read( $bytes ) { |
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163 return fread( $this->_f, $bytes ); |
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164 } |
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165 |
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166 /** |
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167 * @param int $pos |
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168 * @return boolean |
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169 */ |
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170 function seekto( $pos ) { |
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171 if ( -1 == fseek( $this->_f, $pos, SEEK_SET ) ) { |
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172 return false; |
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173 } |
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174 $this->_pos = $pos; |
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175 return true; |
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176 } |
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177 |
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178 /** |
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179 * @return bool |
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180 */ |
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181 function is_resource() { |
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182 return is_resource( $this->_f ); |
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183 } |
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184 |
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185 /** |
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186 * @return bool |
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187 */ |
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188 function feof() { |
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189 return feof( $this->_f ); |
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190 } |
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191 |
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192 /** |
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193 * @return bool |
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194 */ |
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195 function close() { |
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196 return fclose( $this->_f ); |
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197 } |
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198 |
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199 /** |
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200 * @return string |
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201 */ |
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202 function read_all() { |
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203 $all = ''; |
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204 while ( ! $this->feof() ) { |
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205 $all .= $this->read( 4096 ); |
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206 } |
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207 return $all; |
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208 } |
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209 } |
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210 endif; |
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211 |
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212 if ( ! class_exists( 'POMO_StringReader', false ) ) : |
17 /** |
213 /** |
18 * PHP5 constructor. |
214 * Provides file-like methods for manipulating a string instead |
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215 * of a physical file. |
19 */ |
216 */ |
20 function __construct() { |
217 class POMO_StringReader extends POMO_Reader { |
21 $this->is_overloaded = ((ini_get("mbstring.func_overload") & 2) != 0) && function_exists('mb_substr'); |
218 |
22 $this->_pos = 0; |
219 var $_str = ''; |
23 } |
220 |
24 |
221 /** |
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222 * PHP5 constructor. |
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223 */ |
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224 function __construct( $str = '' ) { |
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225 parent::POMO_Reader(); |
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226 $this->_str = $str; |
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227 $this->_pos = 0; |
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228 } |
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229 |
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230 /** |
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231 * PHP4 constructor. |
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232 */ |
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233 public function POMO_StringReader( $str = '' ) { |
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234 self::__construct( $str ); |
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235 } |
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236 |
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237 /** |
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238 * @param string $bytes |
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239 * @return string |
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240 */ |
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241 function read( $bytes ) { |
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242 $data = $this->substr( $this->_str, $this->_pos, $bytes ); |
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243 $this->_pos += $bytes; |
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244 if ( $this->strlen( $this->_str ) < $this->_pos ) { |
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245 $this->_pos = $this->strlen( $this->_str ); |
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246 } |
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247 return $data; |
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248 } |
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249 |
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250 /** |
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251 * @param int $pos |
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252 * @return int |
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253 */ |
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254 function seekto( $pos ) { |
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255 $this->_pos = $pos; |
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256 if ( $this->strlen( $this->_str ) < $this->_pos ) { |
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257 $this->_pos = $this->strlen( $this->_str ); |
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258 } |
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259 return $this->_pos; |
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260 } |
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261 |
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262 /** |
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263 * @return int |
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264 */ |
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265 function length() { |
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266 return $this->strlen( $this->_str ); |
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267 } |
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268 |
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269 /** |
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270 * @return string |
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271 */ |
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272 function read_all() { |
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273 return $this->substr( $this->_str, $this->_pos, $this->strlen( $this->_str ) ); |
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274 } |
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275 |
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276 } |
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277 endif; |
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278 |
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279 if ( ! class_exists( 'POMO_CachedFileReader', false ) ) : |
25 /** |
280 /** |
26 * PHP4 constructor. |
281 * Reads the contents of the file in the beginning. |
27 */ |
282 */ |
28 public function POMO_Reader() { |
283 class POMO_CachedFileReader extends POMO_StringReader { |
29 self::__construct(); |
284 /** |
30 } |
285 * PHP5 constructor. |
31 |
286 */ |
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287 function __construct( $filename ) { |
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288 parent::POMO_StringReader(); |
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289 $this->_str = file_get_contents( $filename ); |
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290 if ( false === $this->_str ) { |
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291 return false; |
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292 } |
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293 $this->_pos = 0; |
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294 } |
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295 |
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296 /** |
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297 * PHP4 constructor. |
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298 */ |
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299 public function POMO_CachedFileReader( $filename ) { |
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300 self::__construct( $filename ); |
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301 } |
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302 } |
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303 endif; |
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304 |
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305 if ( ! class_exists( 'POMO_CachedIntFileReader', false ) ) : |
32 /** |
306 /** |
33 * Sets the endianness of the file. |
307 * Reads the contents of the file in the beginning. |
34 * |
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35 * @param $endian string 'big' or 'little' |
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36 */ |
308 */ |
37 function setEndian($endian) { |
309 class POMO_CachedIntFileReader extends POMO_CachedFileReader { |
38 $this->endian = $endian; |
310 /** |
39 } |
311 * PHP5 constructor. |
40 |
312 */ |
41 /** |
313 public function __construct( $filename ) { |
42 * Reads a 32bit Integer from the Stream |
314 parent::POMO_CachedFileReader( $filename ); |
43 * |
315 } |
44 * @return mixed The integer, corresponding to the next 32 bits from |
316 |
45 * the stream of false if there are not enough bytes or on error |
317 /** |
46 */ |
318 * PHP4 constructor. |
47 function readint32() { |
319 */ |
48 $bytes = $this->read(4); |
320 function POMO_CachedIntFileReader( $filename ) { |
49 if (4 != $this->strlen($bytes)) |
321 self::__construct( $filename ); |
50 return false; |
322 } |
51 $endian_letter = ('big' == $this->endian)? 'N' : 'V'; |
323 } |
52 $int = unpack($endian_letter, $bytes); |
324 endif; |
53 return reset( $int ); |
325 |
54 } |
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55 |
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56 /** |
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57 * Reads an array of 32-bit Integers from the Stream |
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58 * |
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59 * @param integer count How many elements should be read |
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60 * @return mixed Array of integers or false if there isn't |
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61 * enough data or on error |
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62 */ |
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63 function readint32array($count) { |
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64 $bytes = $this->read(4 * $count); |
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65 if (4*$count != $this->strlen($bytes)) |
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66 return false; |
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67 $endian_letter = ('big' == $this->endian)? 'N' : 'V'; |
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68 return unpack($endian_letter.$count, $bytes); |
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69 } |
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70 |
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71 /** |
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72 * @param string $string |
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73 * @param int $start |
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74 * @param int $length |
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75 * @return string |
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76 */ |
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77 function substr($string, $start, $length) { |
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78 if ($this->is_overloaded) { |
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79 return mb_substr($string, $start, $length, 'ascii'); |
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80 } else { |
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81 return substr($string, $start, $length); |
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82 } |
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83 } |
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84 |
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85 /** |
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86 * @param string $string |
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87 * @return int |
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88 */ |
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89 function strlen($string) { |
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90 if ($this->is_overloaded) { |
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91 return mb_strlen($string, 'ascii'); |
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92 } else { |
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93 return strlen($string); |
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94 } |
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95 } |
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96 |
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97 /** |
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98 * @param string $string |
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99 * @param int $chunk_size |
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100 * @return array |
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101 */ |
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102 function str_split($string, $chunk_size) { |
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103 if (!function_exists('str_split')) { |
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104 $length = $this->strlen($string); |
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105 $out = array(); |
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106 for ($i = 0; $i < $length; $i += $chunk_size) |
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107 $out[] = $this->substr($string, $i, $chunk_size); |
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108 return $out; |
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109 } else { |
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110 return str_split( $string, $chunk_size ); |
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111 } |
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112 } |
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113 |
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114 /** |
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115 * @return int |
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116 */ |
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117 function pos() { |
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118 return $this->_pos; |
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119 } |
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120 |
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121 /** |
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122 * @return true |
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123 */ |
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124 function is_resource() { |
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125 return true; |
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126 } |
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127 |
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128 /** |
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129 * @return true |
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130 */ |
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131 function close() { |
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132 return true; |
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133 } |
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134 } |
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135 endif; |
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136 |
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137 if ( ! class_exists( 'POMO_FileReader', false ) ): |
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138 class POMO_FileReader extends POMO_Reader { |
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139 |
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140 /** |
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141 * @param string $filename |
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142 */ |
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143 function __construct( $filename ) { |
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144 parent::POMO_Reader(); |
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145 $this->_f = fopen($filename, 'rb'); |
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146 } |
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147 |
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148 /** |
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149 * PHP4 constructor. |
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150 */ |
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151 public function POMO_FileReader( $filename ) { |
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152 self::__construct( $filename ); |
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153 } |
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154 |
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155 /** |
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156 * @param int $bytes |
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157 */ |
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158 function read($bytes) { |
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159 return fread($this->_f, $bytes); |
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160 } |
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161 |
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162 /** |
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163 * @param int $pos |
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164 * @return boolean |
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165 */ |
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166 function seekto($pos) { |
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167 if ( -1 == fseek($this->_f, $pos, SEEK_SET)) { |
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168 return false; |
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169 } |
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170 $this->_pos = $pos; |
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171 return true; |
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172 } |
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173 |
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174 /** |
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175 * @return bool |
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176 */ |
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177 function is_resource() { |
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178 return is_resource($this->_f); |
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179 } |
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180 |
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181 /** |
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182 * @return bool |
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183 */ |
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184 function feof() { |
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185 return feof($this->_f); |
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186 } |
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187 |
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188 /** |
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189 * @return bool |
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190 */ |
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191 function close() { |
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192 return fclose($this->_f); |
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193 } |
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194 |
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195 /** |
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196 * @return string |
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197 */ |
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198 function read_all() { |
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199 $all = ''; |
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200 while ( !$this->feof() ) |
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201 $all .= $this->read(4096); |
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202 return $all; |
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203 } |
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204 } |
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205 endif; |
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206 |
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207 if ( ! class_exists( 'POMO_StringReader', false ) ): |
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208 /** |
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209 * Provides file-like methods for manipulating a string instead |
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210 * of a physical file. |
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211 */ |
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212 class POMO_StringReader extends POMO_Reader { |
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213 |
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214 var $_str = ''; |
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215 |
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216 /** |
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217 * PHP5 constructor. |
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218 */ |
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219 function __construct( $str = '' ) { |
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220 parent::POMO_Reader(); |
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221 $this->_str = $str; |
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222 $this->_pos = 0; |
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223 } |
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224 |
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225 /** |
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226 * PHP4 constructor. |
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227 */ |
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228 public function POMO_StringReader( $str = '' ) { |
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229 self::__construct( $str ); |
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230 } |
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231 |
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232 /** |
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233 * @param string $bytes |
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234 * @return string |
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235 */ |
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236 function read($bytes) { |
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237 $data = $this->substr($this->_str, $this->_pos, $bytes); |
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238 $this->_pos += $bytes; |
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239 if ($this->strlen($this->_str) < $this->_pos) $this->_pos = $this->strlen($this->_str); |
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240 return $data; |
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241 } |
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242 |
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243 /** |
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244 * @param int $pos |
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245 * @return int |
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246 */ |
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247 function seekto($pos) { |
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248 $this->_pos = $pos; |
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249 if ($this->strlen($this->_str) < $this->_pos) $this->_pos = $this->strlen($this->_str); |
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250 return $this->_pos; |
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251 } |
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252 |
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253 /** |
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254 * @return int |
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255 */ |
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256 function length() { |
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257 return $this->strlen($this->_str); |
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258 } |
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259 |
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260 /** |
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261 * @return string |
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262 */ |
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263 function read_all() { |
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264 return $this->substr($this->_str, $this->_pos, $this->strlen($this->_str)); |
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265 } |
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266 |
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267 } |
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268 endif; |
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269 |
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270 if ( ! class_exists( 'POMO_CachedFileReader', false ) ): |
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271 /** |
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272 * Reads the contents of the file in the beginning. |
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273 */ |
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274 class POMO_CachedFileReader extends POMO_StringReader { |
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275 /** |
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276 * PHP5 constructor. |
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277 */ |
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278 function __construct( $filename ) { |
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279 parent::POMO_StringReader(); |
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280 $this->_str = file_get_contents($filename); |
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281 if (false === $this->_str) |
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282 return false; |
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283 $this->_pos = 0; |
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284 } |
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285 |
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286 /** |
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287 * PHP4 constructor. |
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288 */ |
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289 public function POMO_CachedFileReader( $filename ) { |
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290 self::__construct( $filename ); |
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291 } |
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292 } |
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293 endif; |
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294 |
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295 if ( ! class_exists( 'POMO_CachedIntFileReader', false ) ): |
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296 /** |
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297 * Reads the contents of the file in the beginning. |
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298 */ |
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299 class POMO_CachedIntFileReader extends POMO_CachedFileReader { |
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300 /** |
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301 * PHP5 constructor. |
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302 */ |
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303 public function __construct( $filename ) { |
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304 parent::POMO_CachedFileReader($filename); |
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305 } |
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306 |
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307 /** |
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308 * PHP4 constructor. |
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309 */ |
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310 function POMO_CachedIntFileReader( $filename ) { |
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311 self::__construct( $filename ); |
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312 } |
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313 } |
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314 endif; |
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315 |
|