1 //  Copyright (c) 2001-2011 Hartmut Kaiser
2 //
3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5 
6 #if !defined(BOOST_SPIRIT_KARMA_STRING_COMPARE_AUG_08_2009_0756PM)
7 #define BOOST_SPIRIT_KARMA_STRING_COMPARE_AUG_08_2009_0756PM
8 
9 #if defined(_MSC_VER)
10 #pragma once
11 #endif
12 
13 #include <boost/spirit/home/support/char_class.hpp>
14 #include <boost/spirit/home/karma/detail/generate_to.hpp>
15 
16 namespace boost { namespace spirit { namespace karma { namespace detail
17 {
18     template <typename Char>
string_compare(Char const * attr,Char const * lit)19     bool string_compare(Char const* attr, Char const* lit)
20     {
21         Char ch_attr = *attr;
22         Char ch_lit = *lit;
23 
24         while (!!ch_lit && !!ch_attr)
25         {
26             if (ch_attr != ch_lit)
27                 return false;
28 
29             ch_attr = *++attr;
30             ch_lit = *++lit;
31         }
32 
33         return !ch_lit && !ch_attr;
34     }
35 
36     template <typename Char>
string_compare(Char const * attr,Char const * lit,unused_type,unused_type)37     bool string_compare(Char const* attr, Char const* lit, unused_type, unused_type)
38     {
39         return string_compare(attr, lit);
40     }
41 
42     template <typename Char>
string_compare(unused_type,Char const *,unused_type,unused_type)43     bool string_compare(unused_type, Char const*, unused_type, unused_type)
44     {
45         return true;
46     }
47 
48     template <typename Char, typename CharEncoding, typename Tag>
string_compare(Char const * attr,Char const * lit,CharEncoding,Tag)49     bool string_compare(Char const* attr, Char const* lit, CharEncoding, Tag)
50     {
51         Char ch_attr = *attr;
52         Char ch_lit = spirit::char_class::convert<CharEncoding>::to(Tag(), *lit);
53 
54         while (!!ch_lit && !!ch_attr)
55         {
56             if (ch_attr != ch_lit)
57                 return false;
58 
59             ch_attr = *++attr;
60             ch_lit = spirit::char_class::convert<CharEncoding>::to(Tag(), *++lit);
61         }
62 
63         return !ch_lit && !ch_attr;
64     }
65 
66     template <typename Char, typename CharEncoding, typename Tag>
string_compare(unused_type,Char const *,CharEncoding,Tag)67     bool string_compare(unused_type, Char const*, CharEncoding, Tag)
68     {
69         return true;
70     }
71 
72 }}}}
73 
74 #endif
75