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PHPillow - PHP CouchDB connector

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File: / src/ classes/ tool/ string_stream.php

Type
text/plain text/plain
Last Author
kore
Version
133
Line Rev. Author Source
1 115 kore <?php
2 ↓ kore /**
3 ↓ kore * phpillow string stream
4 ↓ kore *
5 ↓ kore * This file is part of phpillow.
6 ↓ kore *
7 ↓ kore * phpillow is free software; you can redistribute it and/or modify it under
8 ↓ kore * the terms of the GNU Lesser General Public License as published by the Free
9 ↓ kore * Software Foundation; version 3 of the License.
10 ↓ kore *
11 ↓ kore * phpillow is distributed in the hope that it will be useful, but WITHOUT ANY
12 ↓ kore * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 ↓ kore * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
14 ↓ kore * more details.
15 ↓ kore *
16 ↓ kore * You should have received a copy of the GNU Lesser General Public License
17 ↓ kore * along with phpillow; if not, write to the Free Software Foundation, Inc., 51
18 ↓ kore * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 ↓ kore *
20 ↓ kore * @package Core
21 ↓ kore * @version $Revision: 114 $
22 ↓ kore * @license http://www.gnu.org/licenses/lgpl-3.0.txt LGPL
23 ↓ kore */
24 ↓ kore
25 ↓ kore /**
26 ↓ kore * Stream wrapper for plain strings
27 ↓ kore *
28 ↓ kore * @package Core
29 ↓ kore * @version $Revision: 114 $
30 ↓ kore * @license http://www.gnu.org/licenses/lgpl-3.0.txt LGPL
31 ↓ kore */
32 ↓ kore class phpillowToolStringStream
33 ↓ kore {
34 ↓ kore /**
35 ↓ kore * Current position inside the string
36 ↓ kore *
37 ↓ kore * @var int
38 ↓ kore */
39 ↓ kore protected $position = 0;
40 ↓ kore
41 ↓ kore /**
42 ↓ kore * String, wrapped by the stream
43 ↓ kore *
44 ↓ kore * @var string
45 ↓ kore */
46 133 kore protected $string;
47 115 kore
48 ↓ kore /**
49 133 kore * Cached length of the string
50 ↓ kore *
51 ↓ kore * @var int
52 ↓ kore */
53 ↓ kore protected $length;
54 ↓ kore
55 ↓ kore /**
56 115 kore * Open stream
57 ↓ kore *
58 ↓ kore * @param string $path
59 ↓ kore * @param string $mode
60 ↓ kore * @param mixed $options
61 ↓ kore * @param mixed $opened_path
62 ↓ kore * @return bool
63 ↓ kore */
64 ↓ kore public function stream_open( $path, $mode, $options, &$opened_path )
65 ↓ kore {
66 ↓ kore $this->string = substr( $path, strpos( $path, '//' ) + 2 );
67 ↓ kore $this->position = 0;
68 133 kore $this->length = strlen( $this->string );
69 115 kore
70 ↓ kore return true;
71 ↓ kore }
72 ↓ kore
73 ↓ kore /**
74 ↓ kore * Read from stream
75 ↓ kore *
76 ↓ kore * @param int $count
77 ↓ kore * @return string
78 ↓ kore */
79 ↓ kore public function stream_read( $count )
80 ↓ kore {
81 ↓ kore $ret = substr( $this->string, $this->position, $count );
82 ↓ kore $this->position += strlen( $ret );
83 ↓ kore return $ret;
84 ↓ kore }
85 ↓ kore
86 ↓ kore /**
87 ↓ kore * Write to stream
88 ↓ kore *
89 ↓ kore * @param string $data
90 ↓ kore * @return int
91 ↓ kore */
92 ↓ kore public function stream_write( $data )
93 ↓ kore {
94 ↓ kore $left = substr( $this->string, 0, $this->position );
95 ↓ kore $right = substr( $this->string, $this->position + strlen( $data ) );
96 ↓ kore $this->string = $left . $data . $right;
97 133 kore $this->position += $written = strlen( $data );
98 ↓ kore $this->length = strlen( $this->string );
99 ↓ kore return $written;
100 115 kore }
101 ↓ kore
102 ↓ kore /**
103 ↓ kore * Tell current stream position
104 ↓ kore *
105 ↓ kore * @return int
106 ↓ kore */
107 ↓ kore public function stream_tell()
108 ↓ kore {
109 ↓ kore return $this->position;
110 ↓ kore }
111 ↓ kore
112 ↓ kore /**
113 ↓ kore * Has the stream reached its end?
114 ↓ kore *
115 ↓ kore * @return bool
116 ↓ kore */
117 ↓ kore public function stream_eof()
118 ↓ kore {
119 133 kore return $this->position >= $this->length;
120 115 kore }
121 ↓ kore
122 ↓ kore /**
123 ↓ kore * Seek to a defined position in the string
124 ↓ kore *
125 ↓ kore * @param int $offset
126 ↓ kore * @param int $whence
127 ↓ kore * @return bool
128 ↓ kore */
129 ↓ kore public function stream_seek($offset, $whence)
130 ↓ kore {
131 ↓ kore switch ( $whence ) {
132 ↓ kore case SEEK_SET:
133 133 kore if ( ( $offset < $this->length ) &&
134 115 kore ( $offset >= 0 ) )
135 ↓ kore {
136 ↓ kore $this->position = $offset;
137 ↓ kore return true;
138 ↓ kore }
139 ↓ kore else
140 ↓ kore {
141 ↓ kore return false;
142 ↓ kore }
143 ↓ kore break;
144 ↓ kore
145 ↓ kore case SEEK_CUR:
146 ↓ kore if ( $offset >= 0 )
147 ↓ kore {
148 ↓ kore $this->position += $offset;
149 ↓ kore return true;
150 ↓ kore }
151 ↓ kore else
152 ↓ kore {
153 ↓ kore return false;
154 ↓ kore }
155 ↓ kore break;
156 ↓ kore
157 ↓ kore case SEEK_END:
158 133 kore if ( ( $this->length + $offset ) >= 0 )
159 115 kore {
160 133 kore $this->position = $this->length + $offset;
161 115 kore return true;
162 ↓ kore }
163 ↓ kore else
164 ↓ kore {
165 ↓ kore return false;
166 ↓ kore }
167 ↓ kore break;
168 ↓ kore
169 ↓ kore default:
170 ↓ kore return false;
171 ↓ kore }
172 ↓ kore }
173 ↓ kore
174 ↓ kore /**
175 ↓ kore * Returns information about the stream
176 ↓ kore *
177 ↓ kore * @return void
178 ↓ kore */
179 ↓ kore public function stream_stat()
180 ↓ kore {
181 ↓ kore return array();
182 ↓ kore }
183 ↓ kore }
184 ↓ kore

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