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alphanum.h
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1 /*
2 The Alphanum Algorithm is an improved sorting algorithm for strings
3 containing numbers. Instead of sorting numbers in ASCII order like a
4 standard sort, this algorithm sorts numbers in numeric order.
5 
6 The Alphanum Algorithm is discussed at http://www.DaveKoelle.com
7 
8 This implementation is Copyright (c) 2008 Dirk Jagdmann <doj@cubic.org>.
9 It is a cleanroom implementation of the algorithm and not derived by
10 other's works. In contrast to the versions written by Dave Koelle this
11 source code is distributed with the libpng/zlib license.
12 
13 This software is provided 'as-is', without any express or implied
14 warranty. In no event will the authors be held liable for any damages
15 arising from the use of this software.
16 
17 Permission is granted to anyone to use this software for any purpose,
18 including commercial applications, and to alter it and redistribute it
19 freely, subject to the following restrictions:
20 
21  1. The origin of this software must not be misrepresented; you
22  must not claim that you wrote the original software. If you use
23  this software in a product, an acknowledgment in the product
24  documentation would be appreciated but is not required.
25 
26  2. Altered source versions must be plainly marked as such, and
27  must not be misrepresented as being the original software.
28 
29  3. This notice may not be removed or altered from any source
30  distribution. */
31 
32 /* $Header: /code/doj/alphanum.hpp,v 1.3 2008/01/28 23:06:47 doj Exp $
33 
34  slightly modified version, the main function is unaltered, but the
35  interface definitions are changed to better suit hugins needs
36 */
37 
38 #ifndef ALPHANUM__HPP
39 #define ALPHANUM__HPP
40 
41 #include <hugin_shared.h>
42 #include <string>
43 
44 // TODO: make comparison with hexadecimal numbers. Extend the alphanum_comp() function by traits to choose between decimal and hexadecimal.
45 
46 namespace doj
47 {
48 
56 IMPEX int alphanum_comp(const std::string& l, const std::string& r);
57 IMPEX int alphanum_comp(const char* l, const char* r);
58 
60 
66 {
67  bool operator()(const std::string& left, const std::string& right) const;
68 };
69 
70 }
71 
72 #endif
int alphanum_comp(const std::string &l, const std::string &r)
Compare l and r with the same semantics as strcmp(), but with the &quot;Alphanum Algorithm&quot; which produces...
Definition: alphanum.cpp:119
Functor class to compare two objects with the &quot;Alphanum Algorithm&quot;.
Definition: alphanum.h:65
#define IMPEX
Definition: hugin_shared.h:39