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1 | <?php |
2 | /* | |
3 | Copyright (c) 2003, 2005 Danilo Segan <danilo@kvota.net>. | |
4 | ||
5 | This file is part of PHP-gettext. | |
6 | ||
7 | PHP-gettext is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | PHP-gettext is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with PHP-gettext; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | ||
21 | */ | |
22 | ||
23 | ||
24 | // Simple class to wrap file streams, string streams, etc. | |
25 | // seek is essential, and it should be byte stream | |
26 | class StreamReader { | |
27 | // should return a string [FIXME: perhaps return array of bytes?] | |
28 | function read($bytes) { | |
29 | return false; | |
30 | } | |
31 | ||
32 | // should return new position | |
33 | function seekto($position) { | |
34 | return false; | |
35 | } | |
36 | ||
37 | // returns current position | |
38 | function currentpos() { | |
39 | return false; | |
40 | } | |
41 | ||
42 | // returns length of entire stream (limit for seekto()s) | |
43 | function length() { | |
44 | return false; | |
45 | } | |
46 | } | |
47 | ||
48 | class StringReader { | |
49 | var $_pos; | |
50 | var $_str; | |
51 | ||
52 | function StringReader($str='') { | |
53 | $this->_str = $str; | |
54 | $this->_pos = 0; | |
55 | } | |
56 | ||
57 | function read($bytes) { | |
58 | $data = substr($this->_str, $this->_pos, $bytes); | |
59 | $this->_pos += $bytes; | |
60 | if (strlen($this->_str)<$this->_pos) | |
61 | $this->_pos = strlen($this->_str); | |
62 | ||
63 | return $data; | |
64 | } | |
65 | ||
66 | function seekto($pos) { | |
67 | $this->_pos = $pos; | |
68 | if (strlen($this->_str)<$this->_pos) | |
69 | $this->_pos = strlen($this->_str); | |
70 | return $this->_pos; | |
71 | } | |
72 | ||
73 | function currentpos() { | |
74 | return $this->_pos; | |
75 | } | |
76 | ||
77 | function length() { | |
78 | return strlen($this->_str); | |
79 | } | |
80 | ||
81 | } | |
82 | ||
83 | ||
84 | class FileReader { | |
85 | var $_pos; | |
86 | var $_fd; | |
87 | var $_length; | |
88 | ||
89 | function FileReader($filename) { | |
90 | if (file_exists($filename)) { | |
91 | ||
92 | $this->_length=filesize($filename); | |
93 | $this->_pos = 0; | |
94 | $this->_fd = fopen($filename,'rb'); | |
95 | if (!$this->_fd) { | |
96 | $this->error = 3; // Cannot read file, probably permissions | |
97 | return false; | |
98 | } | |
99 | } else { | |
100 | $this->error = 2; // File doesn't exist | |
101 | return false; | |
102 | } | |
103 | } | |
104 | ||
105 | function read($bytes) { | |
106 | if ($bytes) { | |
107 | fseek($this->_fd, $this->_pos); | |
108 | ||
109 | // PHP 5.1.1 does not read more than 8192 bytes in one fread() | |
110 | // the discussions at PHP Bugs suggest it's the intended behaviour | |
111 | while ($bytes > 0) { | |
112 | $chunk = fread($this->_fd, $bytes); | |
113 | $data .= $chunk; | |
114 | $bytes -= strlen($chunk); | |
115 | } | |
116 | $this->_pos = ftell($this->_fd); | |
117 | ||
118 | return $data; | |
119 | } else return ''; | |
120 | } | |
121 | ||
122 | function seekto($pos) { | |
123 | fseek($this->_fd, $pos); | |
124 | $this->_pos = ftell($this->_fd); | |
125 | return $this->_pos; | |
126 | } | |
127 | ||
128 | function currentpos() { | |
129 | return $this->_pos; | |
130 | } | |
131 | ||
132 | function length() { | |
133 | return $this->_length; | |
134 | } | |
135 | ||
136 | function close() { | |
137 | fclose($this->_fd); | |
138 | } | |
139 | ||
140 | } | |
141 | ||
142 | // Preloads entire file in memory first, then creates a StringReader | |
143 | // over it (it assumes knowledge of StringReader internals) | |
144 | class CachedFileReader extends StringReader { | |
145 | function CachedFileReader($filename) { | |
146 | if (file_exists($filename)) { | |
147 | ||
148 | $length=filesize($filename); | |
149 | $fd = fopen($filename,'rb'); | |
150 | ||
151 | if (!$fd) { | |
152 | $this->error = 3; // Cannot read file, probably permissions | |
153 | return false; | |
154 | } | |
155 | $this->_str = fread($fd, $length); | |
156 | fclose($fd); | |
157 | ||
158 | } else { | |
159 | $this->error = 2; // File doesn't exist | |
160 | return false; | |
161 | } | |
162 | } | |
163 | } | |
164 | ||
165 | ||
166 | ?> |