1 | <?php |
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2 | /* |
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3 | Copyright (c) 2003, 2005, 2006, 2009 Danilo Segan <danilo@kvota.net>. |
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4 | |
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5 | This file is part of PHP-gettext. |
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6 | |
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7 | PHP-gettext is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 2 of the License, or |
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10 | (at your option) any later version. |
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11 | |
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12 | PHP-gettext 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 PHP-gettext; 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 | */ |
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22 | |
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23 | |
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24 | // Simple class to wrap file streams, string streams, etc. |
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25 | // seek is essential, and it should be byte stream |
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26 | class StreamReader { |
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27 | // should return a string [FIXME: perhaps return array of bytes?] |
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28 | function read($bytes) { |
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29 | return false; |
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30 | } |
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31 | |
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32 | // should return new position |
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33 | function seekto($position) { |
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34 | return false; |
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35 | } |
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36 | |
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37 | // returns current position |
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38 | function currentpos() { |
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39 | return false; |
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40 | } |
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41 | |
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42 | // returns length of entire stream (limit for seekto()s) |
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43 | function length() { |
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44 | return false; |
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45 | } |
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46 | }; |
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47 | |
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48 | class StringReader { |
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49 | var $_pos; |
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50 | var $_str; |
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51 | |
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52 | function StringReader($str='') { |
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53 | $this->_str = $str; |
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54 | $this->_pos = 0; |
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55 | } |
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56 | |
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57 | function read($bytes) { |
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58 | $data = substr($this->_str, $this->_pos, $bytes); |
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59 | $this->_pos += $bytes; |
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60 | if (strlen($this->_str)<$this->_pos) |
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61 | $this->_pos = strlen($this->_str); |
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62 | |
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63 | return $data; |
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64 | } |
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65 | |
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66 | function seekto($pos) { |
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67 | $this->_pos = $pos; |
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68 | if (strlen($this->_str)<$this->_pos) |
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69 | $this->_pos = strlen($this->_str); |
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70 | return $this->_pos; |
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71 | } |
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72 | |
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73 | function currentpos() { |
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74 | return $this->_pos; |
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75 | } |
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76 | |
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77 | function length() { |
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78 | return strlen($this->_str); |
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79 | } |
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80 | |
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81 | }; |
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82 | |
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83 | |
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84 | class FileReader { |
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85 | var $_pos; |
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86 | var $_fd; |
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87 | var $_length; |
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88 | |
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89 | function FileReader($filename) { |
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90 | if (file_exists($filename)) { |
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91 | |
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92 | $this->_length=filesize($filename); |
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93 | $this->_pos = 0; |
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94 | $this->_fd = fopen($filename,'rb'); |
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95 | if (!$this->_fd) { |
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96 | $this->error = 3; // Cannot read file, probably permissions |
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97 | return false; |
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98 | } |
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99 | } else { |
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100 | $this->error = 2; // File doesn't exist |
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101 | return false; |
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102 | } |
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103 | } |
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104 | |
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105 | function read($bytes) { |
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106 | if ($bytes) { |
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107 | fseek($this->_fd, $this->_pos); |
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108 | |
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109 | // PHP 5.1.1 does not read more than 8192 bytes in one fread() |
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110 | // the discussions at PHP Bugs suggest it's the intended behaviour |
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111 | $data = ''; |
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112 | while ($bytes > 0) { |
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113 | $chunk = fread($this->_fd, $bytes); |
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114 | $data .= $chunk; |
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115 | $bytes -= strlen($chunk); |
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116 | } |
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117 | $this->_pos = ftell($this->_fd); |
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118 | |
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119 | return $data; |
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120 | } else return ''; |
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121 | } |
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122 | |
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123 | function seekto($pos) { |
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124 | fseek($this->_fd, $pos); |
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125 | $this->_pos = ftell($this->_fd); |
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126 | return $this->_pos; |
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127 | } |
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128 | |
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129 | function currentpos() { |
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130 | return $this->_pos; |
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131 | } |
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132 | |
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133 | function length() { |
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134 | return $this->_length; |
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135 | } |
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136 | |
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137 | function close() { |
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138 | fclose($this->_fd); |
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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 | // Preloads entire file in memory first, then creates a StringReader |
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144 | // over it (it assumes knowledge of StringReader internals) |
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145 | class CachedFileReader extends StringReader { |
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146 | function CachedFileReader($filename) { |
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147 | if (file_exists($filename)) { |
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148 | |
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149 | $length=filesize($filename); |
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150 | $fd = fopen($filename,'rb'); |
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151 | |
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152 | if (!$fd) { |
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153 | $this->error = 3; // Cannot read file, probably permissions |
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154 | return false; |
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155 | } |
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156 | $this->_str = fread($fd, $length); |
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157 | fclose($fd); |
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158 | |
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159 | } else { |
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160 | $this->error = 2; // File doesn't exist |
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161 | return false; |
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162 | } |
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163 | } |
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164 | }; |
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165 | |
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166 | |
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167 | ?> |
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