1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
<?php
/** * Parses a list of expressions delimited by a comma. */
namespace PhpMyAdmin\SqlParser\Components;
use PhpMyAdmin\SqlParser\Component; use PhpMyAdmin\SqlParser\Parser; use PhpMyAdmin\SqlParser\Token; use PhpMyAdmin\SqlParser\TokensList;
/** * Parses a list of expressions delimited by a comma. * * @category Keywords * * @license https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+ */ class ExpressionArray extends Component { /** * @param Parser $parser the parser that serves as context * @param TokensList $list the list of tokens that are being parsed * @param array $options parameters for parsing * * @return Expression[] */ public static function parse(Parser $parser, TokensList $list, array $options = array()) { $ret = array();
/** * The state of the parser. * * Below are the states of the parser. * * 0 ----------------------[ array ]---------------------> 1 * * 1 ------------------------[ , ]------------------------> 0 * 1 -----------------------[ else ]----------------------> (END) * * @var int */ $state = 0;
for (; $list->idx < $list->count; ++$list->idx) { /** * Token parsed at this moment. * * @var Token */ $token = $list->tokens[$list->idx];
// End of statement. if ($token->type === Token::TYPE_DELIMITER) { break; }
// Skipping whitespaces and comments. if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) { continue; }
if (($token->type === Token::TYPE_KEYWORD) && ($token->flags & Token::FLAG_KEYWORD_RESERVED) && ((~$token->flags & Token::FLAG_KEYWORD_FUNCTION)) && ($token->value !== 'DUAL') && ($token->value !== 'NULL') && ($token->value !== 'CASE') ) { // No keyword is expected. break; }
if ($state === 0) { if ($token->type === Token::TYPE_KEYWORD && $token->value === 'CASE' ) { $expr = CaseExpression::parse($parser, $list, $options); } else { $expr = Expression::parse($parser, $list, $options); }
if ($expr === null) { break; } $ret[] = $expr; $state = 1; } elseif ($state === 1) { if ($token->value === ',') { $state = 0; } else { break; } } }
if ($state === 0) { $parser->error( 'An expression was expected.', $list->tokens[$list->idx] ); }
--$list->idx;
return $ret; }
/** * @param ExpressionArray[] $component the component to be built * @param array $options parameters for building * * @return string */ public static function build($component, array $options = array()) { $ret = array(); foreach ($component as $frag) { $ret[] = $frag::build($frag); }
return implode($ret, ', '); } }
|