1/*
2 *
3 * Copyright (c) 2004
4 * John Maddock
5 *
6 * Use, modification and distribution are subject to the
7 * Boost Software License, Version 1.0. (See accompanying file
8 * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9 *
10 */
11
12 /*
13 * LOCATION: see http://www.boost.org for most recent version.
14 * FILE cpp_regex_traits.cpp
15 * VERSION see <boost/version.hpp>
16 * DESCRIPTION: Implements cpp_regex_traits<char> (and associated helper classes).
17 */
18
19#define BOOST_REGEX_SOURCE
20#include <boost/config.hpp>
21#ifndef BOOST_NO_STD_LOCALE
22#include <boost/regex/regex_traits.hpp>
23#include <boost/regex/pattern_except.hpp>
24
25#ifdef BOOST_NO_STDC_NAMESPACE
26namespace std{
27 using ::memset;
28}
29#endif
30
31namespace boost{ namespace BOOST_REGEX_DETAIL_NS{
32
33void cpp_regex_traits_char_layer<char>::init()
34{
35 // we need to start by initialising our syntax map so we know which
36 // character is used for which purpose:
37 std::memset(m_char_map, 0, sizeof(m_char_map));
38#ifndef BOOST_NO_STD_MESSAGES
39#ifndef __IBMCPP__
40 std::messages<char>::catalog cat = static_cast<std::messages<char>::catalog>(-1);
41#else
42 std::messages<char>::catalog cat = reinterpret_cast<std::messages<char>::catalog>(-1);
43#endif
44 std::string cat_name(cpp_regex_traits<char>::get_catalog_name());
45 if(cat_name.size() && (m_pmessages != 0))
46 {
47 cat = this->m_pmessages->open(
48 cat_name,
49 this->m_locale);
50 if((int)cat < 0)
51 {
52 std::string m("Unable to open message catalog: ");
53 std::runtime_error err(m + cat_name);
54 boost::BOOST_REGEX_DETAIL_NS::raise_runtime_error(err);
55 }
56 }
57 //
58 // if we have a valid catalog then load our messages:
59 //
60 if((int)cat >= 0)
61 {
62#ifndef BOOST_NO_EXCEPTIONS
63 try{
64#endif
65 for(regex_constants::syntax_type i = 1; i < regex_constants::syntax_max; ++i)
66 {
67 string_type mss = this->m_pmessages->get(cat, 0, i, get_default_syntax(i));
68 for(string_type::size_type j = 0; j < mss.size(); ++j)
69 {
70 m_char_map[static_cast<unsigned char>(mss[j])] = i;
71 }
72 }
73 this->m_pmessages->close(cat);
74#ifndef BOOST_NO_EXCEPTIONS
75 }
76 catch(...)
77 {
78 this->m_pmessages->close(cat);
79 throw;
80 }
81#endif
82 }
83 else
84 {
85#endif
86 for(regex_constants::syntax_type j = 1; j < regex_constants::syntax_max; ++j)
87 {
88 const char* ptr = get_default_syntax(j);
89 while(ptr && *ptr)
90 {
91 m_char_map[static_cast<unsigned char>(*ptr)] = j;
92 ++ptr;
93 }
94 }
95#ifndef BOOST_NO_STD_MESSAGES
96 }
97#endif
98 //
99 // finish off by calculating our escape types:
100 //
101 unsigned char i = 'A';
102 do
103 {
104 if(m_char_map[i] == 0)
105 {
106 if(this->m_pctype->is(std::ctype_base::lower, i))
107 m_char_map[i] = regex_constants::escape_type_class;
108 else if(this->m_pctype->is(std::ctype_base::upper, i))
109 m_char_map[i] = regex_constants::escape_type_not_class;
110 }
111 }while(0xFF != i++);
112}
113
114} // BOOST_REGEX_DETAIL_NS
115} // boost
116#endif
117
118