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 
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 
Definition: clanapp.h:35
void move_to_leadbyte()
Moves position to the lead byte of the character.
void set_position(std::string::size_type position)
Set the current position of the reader.
bool is_end()
Returns true if the current position is at the end of the string.
value is a keyword
std::string::size_type get_char_length()
Returns the length of the current character.
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.
void prev()
Moves position to the previous character.
void next()
Moves position to the next character.
std::string::size_type get_position()
Get the current position of the reader.
UTF8 reader helper functions.
Definition: utf8_reader.h:41
unsigned int get_char()
Get the character at the current position.