|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* ContentStream handles all the information being loaded |
|
5
|
|
|
* into the Rivescript interpreter. |
|
6
|
|
|
* |
|
7
|
|
|
* @package Rivescript-php |
|
8
|
|
|
* @subpackage Core |
|
9
|
|
|
* @category ContentLoader |
|
10
|
|
|
* @author Johnny Mast <[email protected]> |
|
11
|
|
|
*/ |
|
12
|
|
|
|
|
13
|
|
|
namespace Axiom\Rivescript\Cortex\ContentLoader; |
|
14
|
|
|
|
|
15
|
|
|
/** |
|
16
|
|
|
* This class taken from php.net and changed |
|
17
|
|
|
* to be workable for this project. |
|
18
|
|
|
* |
|
19
|
|
|
* @see https://www.php.net/manual/en/stream.streamwrapper.example-1.php |
|
20
|
|
|
* @see https://www.php.net/manual/en/class.streamwrapper |
|
21
|
|
|
*/ |
|
22
|
|
|
class ContentStream |
|
23
|
|
|
{ |
|
24
|
|
|
/** |
|
25
|
|
|
* The cursor position inside the stream. |
|
26
|
|
|
* |
|
27
|
|
|
* @var int |
|
28
|
|
|
*/ |
|
29
|
|
|
private $position; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* The variable that holds |
|
33
|
|
|
* the contents of the stream. |
|
34
|
|
|
* |
|
35
|
|
|
* @var string |
|
36
|
|
|
*/ |
|
37
|
|
|
protected $content; |
|
38
|
|
|
|
|
39
|
|
|
/** |
|
40
|
|
|
* Specifies the URL that was passed to the original function. |
|
41
|
|
|
* This is currently not used. |
|
42
|
|
|
* |
|
43
|
|
|
* @var string |
|
44
|
|
|
*/ |
|
45
|
|
|
protected $path; |
|
46
|
|
|
|
|
47
|
|
|
/** |
|
48
|
|
|
* The mode to operate in. |
|
49
|
|
|
* This is currently not used. |
|
50
|
|
|
* |
|
51
|
|
|
* @var string |
|
52
|
|
|
*/ |
|
53
|
|
|
protected $mode; |
|
54
|
|
|
|
|
55
|
|
|
/** |
|
56
|
|
|
* @param string $path Specifies the URL that was passed to the original function. |
|
57
|
|
|
* @param string $mode The mode used to open the file, as detailed for fopen(). |
|
58
|
|
|
* |
|
59
|
|
|
* @see https://www.php.net/manual/en/function.fopen.php |
|
60
|
|
|
* |
|
61
|
|
|
* @return bool |
|
62
|
|
|
*/ |
|
63
|
|
|
public function stream_open(string $path, string $mode): bool |
|
|
|
|
|
|
64
|
|
|
{ |
|
65
|
|
|
$this->content = ''; |
|
66
|
|
|
$this->position = 0; |
|
67
|
|
|
return true; |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
|
|
/** |
|
71
|
|
|
* Read data from the stream. |
|
72
|
|
|
* |
|
73
|
|
|
* @param int $count |
|
74
|
|
|
* |
|
75
|
|
|
* @return string |
|
76
|
|
|
*/ |
|
77
|
|
|
public function stream_read(int $count): string |
|
78
|
|
|
{ |
|
79
|
|
|
$p =& $this->position; |
|
80
|
|
|
$ret = substr($this->content, $p, $count); |
|
81
|
|
|
$p += strlen($ret); |
|
82
|
|
|
return $ret; |
|
83
|
|
|
} |
|
84
|
|
|
|
|
85
|
|
|
/** |
|
86
|
|
|
* Write to the content. |
|
87
|
|
|
* |
|
88
|
|
|
* @param string $data The data to add to the stream. |
|
89
|
|
|
* |
|
90
|
|
|
* @return int |
|
91
|
|
|
*/ |
|
92
|
|
|
public function stream_write(string $data): int |
|
93
|
|
|
{ |
|
94
|
|
|
$v =& $this->content; |
|
95
|
|
|
$l = strlen($data); |
|
96
|
|
|
$p =& $this->position; |
|
97
|
|
|
$v = substr($v, 0, $p) . $data . substr($v, $p += $l); |
|
98
|
|
|
return $l; |
|
99
|
|
|
} |
|
100
|
|
|
|
|
101
|
|
|
/** |
|
102
|
|
|
* Return the current position |
|
103
|
|
|
* in the stream. |
|
104
|
|
|
* |
|
105
|
|
|
* @return int |
|
106
|
|
|
*/ |
|
107
|
|
|
public function stream_tell(): int |
|
108
|
|
|
{ |
|
109
|
|
|
return $this->position; |
|
110
|
|
|
} |
|
111
|
|
|
|
|
112
|
|
|
/** |
|
113
|
|
|
* Tests for end-of-stream on a pointer position. |
|
114
|
|
|
* |
|
115
|
|
|
* @return bool |
|
116
|
|
|
*/ |
|
117
|
|
|
public function stream_eof(): bool |
|
118
|
|
|
{ |
|
119
|
|
|
return ($this->position >= strlen($this->content)); |
|
120
|
|
|
} |
|
121
|
|
|
|
|
122
|
|
|
/** |
|
123
|
|
|
* Move the cursor inside the stream to this position. |
|
124
|
|
|
* |
|
125
|
|
|
* @param int $offset Seek this position in the stream. |
|
126
|
|
|
* @param int $whence The seek type. |
|
127
|
|
|
* |
|
128
|
|
|
* @see https://www.php.net/fseek for more information. |
|
129
|
|
|
* |
|
130
|
|
|
* @return bool |
|
131
|
|
|
*/ |
|
132
|
|
|
public function stream_seek(int $offset, int $whence = SEEK_SET): bool |
|
133
|
|
|
{ |
|
134
|
|
|
$l = strlen($this->content); |
|
135
|
|
|
$p =& $this->position; |
|
136
|
|
|
switch ($whence) { |
|
137
|
|
|
case SEEK_SET: |
|
138
|
|
|
$newPos = $offset; |
|
139
|
|
|
break; |
|
140
|
|
|
case SEEK_CUR: |
|
141
|
|
|
$newPos = $p + $offset; |
|
142
|
|
|
break; |
|
143
|
|
|
case SEEK_END: |
|
144
|
|
|
$newPos = $l + $offset; |
|
145
|
|
|
break; |
|
146
|
|
|
default: |
|
147
|
|
|
return false; |
|
148
|
|
|
} |
|
149
|
|
|
$ret = ($newPos >= 0 && $newPos <= $l); |
|
150
|
|
|
if ($ret) $p = $newPos; |
|
151
|
|
|
return $ret; |
|
152
|
|
|
} |
|
153
|
|
|
} |
|
154
|
|
|
|
johnnymast /
rivescript-php
Loading history...
This check looks for parameters that have been defined for a function or method, but which are not used in the method body.