GV

GeezerVison

The World Wide Web, restored to 800 pixels of glory.

Home|About|Gaming cabinet|Archives|How it works|Starter sites

On this site

  • Sign in
  • ActionsCI/CD and automation
  • CodespacesCloud development environments
  • All Features
  • Documentation
  • Training
  • Certifications
  • Build with Copilot
  • Customize Copilot
  • Integrations
  • Trending repos
  • GitHub Sponsors
  • Developer articles
  • Enterprises

This view

  • Original page
  • New address

GeezerVison is showing github.com — sql-parser/src/UtfString.php at master · phpmyadmin/sql-parser

Expand file tree

/

UtfString.php

Copy path
More file actions
More file actions

Latest commit

 

History

History
History
116 lines (103 loc) · 2.71 KB
/

UtfString.php

Copy path

File metadata and controls

116 lines (103 loc) · 2.71 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
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
<?php
declare(strict_types=1);
namespace PhpMyAdmin\SqlParser;
use ArrayAccess;
use Exception;
use JsonSerializable;
use Stringable;
use function count;
use function implode;
use function mb_check_encoding;
use function mb_str_split;
/**
* Implementation for UTF-8 strings.
*
* The subscript operator in PHP, when used with string will return a byte and not a character. Because in UTF-8
* strings a character may occupy more than one byte, the subscript operator may return an invalid character.
*
* Because the lexer relies on the subscript operator this class had to be implemented.
*
* Implements array-like access for UTF-8 strings.
*
* In this library, this class should be used to parse UTF-8 queries.
*
* @implements ArrayAccess<int, string>
*/
class UtfString implements ArrayAccess, Stringable, JsonSerializable
{
/**
* The multi-byte characters.
*
* @var list<string>
*/
public array $characters;
/** @param string $str the string */
public function __construct(string $str)
{
if (mb_check_encoding($str, 'UTF-8')) {
$this->characters = mb_str_split($str, 1, 'UTF-8');
} else {
$this->characters = [];
}
}
/**
* Checks if the given offset exists.
*
* @param int $offset the offset to be checked
*/
public function offsetExists(mixed $offset): bool
{
return $offset >= 0 && $offset < count($this->characters);
}
/**
* Gets the character at given offset.
*
* @param int $offset the offset to be returned
*/
public function offsetGet(mixed $offset): string
{
return $this->characters[$offset] ?? '';
}
/**
* Sets the value of a character.
*
* @param int $offset the offset to be set
* @param string $value the value to be set
*
* @throws Exception not implemented.
*/
public function offsetSet(mixed $offset, mixed $value): void
{
throw new Exception('Not implemented.');
}
/**
* Unsets an index.
*
* @param int $offset the value to be unset
*
* @throws Exception not implemented.
*/
public function offsetUnset(mixed $offset): void
{
throw new Exception('Not implemented.');
}
/**
* Returns the length in characters of the string.
*/
public function length(): int
{
return count($this->characters);
}
/**
* Returns the contained string.
*/
public function __toString(): string
{
return implode('', $this->characters);
}
/** @return array<mixed> */
public function jsonSerialize(): array
{
return ['@type' => static::class, 'str' => (string) $this];
}
}
You are visitor 01402503 — GeezerVison does not store the pages you look up.
Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.