utf8_reader.h
1 /*
2 ** ClanLib SDK
3 ** Copyright (c) 1997-2015 The ClanLib Team
4 **
5 ** This software is provided 'as-is', without any express or implied
6 ** warranty. In no event will the authors be held liable for any damages
7 ** arising from the use of this software.
8 **
9 ** Permission is granted to anyone to use this software for any purpose,
10 ** including commercial applications, and to alter it and redistribute it
11 ** freely, subject to the following restrictions:
12 **
13 ** 1. The origin of this software must not be misrepresented; you must not
14 ** claim that you wrote the original software. If you use this software
15 ** in a product, an acknowledgment in the product documentation would be
16 ** appreciated but is not required.
17 ** 2. Altered source versions must be plainly marked as such, and must not be
18 ** misrepresented as being the original software.
19 ** 3. This notice may not be removed or altered from any source distribution.
20 **
21 ** Note: Some of the libraries ClanLib may link to may have additional
22 ** requirements or restrictions.
23 **
24 ** File Author(s):
25 **
26 ** Mark Page
27 */
28
29 #pragma once
30
31 #include <memory>
32
33 namespace clan
34 {
37
38 class UTF8_Reader_Impl;
39
41 class UTF8_Reader
42 {
43 public:
47 UTF8_Reader(const std::string::value_type *text, std::string::size_type length);
48
52
53 public:
55 bool is_end();
56
58 unsigned int get_char();
59
61 std::string::size_type get_char_length();
62
64 void prev();
65
67 void next();
68
70 void move_to_leadbyte();
71
73 std::string::size_type get_position();
74
76 void set_position(std::string::size_type position);
77
81
82 private:
83 std::string::size_type current_position = 0;
84 std::string::size_type length = 0;
85 const unsigned char *data = nullptr;
87 };
88
89 }
90
clan
Definition: clanapp.h:35
clan::UTF8_Reader::move_to_leadbyte
void move_to_leadbyte()
Moves position to the lead byte of the character.
clan::UTF8_Reader::set_position
void set_position(std::string::size_type position)
Set the current position of the reader.
clan::UTF8_Reader::is_end
bool is_end()
Returns true if the current position is at the end of the string.
clan::UTF8_Reader::get_char_length
std::string::size_type get_char_length()
Returns the length of the current character.
clan::UTF8_Reader::UTF8_Reader
UTF8_Reader(const std::string::value_type *text, std::string::size_type length)
Important: text is not copied by this class and must remain valid during its usage.
clan::UTF8_Reader::prev
void prev()
Moves position to the previous character.
clan::UTF8_Reader::next
void next()
Moves position to the next character.
clan::UTF8_Reader::get_position
std::string::size_type get_position()
Get the current position of the reader.
clan::UTF8_Reader
UTF8 reader helper functions.
Definition: utf8_reader.h:41
clan::UTF8_Reader::get_char
unsigned int get_char()
Get the character at the current position.