11.2.0/bits/quoted_string.h

// Helpers for quoted stream manipulators -*- C++ -*-

// Copyright (C) 2013-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/quoted_string.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{iomanip}
 */

#ifndef _GLIBCXX_QUOTED_STRING_H
#define _GLIBCXX_QUOTED_STRING_H 1

#pragma GCC system_header

#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else
#include <sstream>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  namespace __detail {
    /**
     * @brief Struct for delimited strings.
     */
    template<typename _String, typename _CharT>
      struct _Quoted_string
      {
        static_assert(is_reference<_String>::value
                   || is_pointer<_String>::value,
                      "String type must be pointer or reference");

        _Quoted_string(_String __str, _CharT __del, _CharT __esc)
        : _M_string(__str), _M_delim{__del}, _M_escape{__esc}
        { }

        _Quoted_string&
        operator=(_Quoted_string&) = delete;

        _String _M_string;
        _CharT _M_delim;
        _CharT _M_escape;
      };

#if __cplusplus >= 201703L
    template<typename _CharT, typename _Traits>
      struct _Quoted_string<basic_string_view<_CharT, _Traits>, _CharT>
      {
        _Quoted_string(basic_string_view<_CharT, _Traits> __str,
                       _CharT __del, _CharT __esc)
        : _M_string(__str), _M_delim{__del}, _M_escape{__esc}
        { }

        _Quoted_string&
        operator=(_Quoted_string&) = delete;

        basic_string_view<_CharT, _Traits> _M_string;
        _CharT _M_delim;
        _CharT _M_escape;
      };
#endif // C++17

    /**
     * @brief Inserter for quoted strings.
     *
     *  _GLIBCXX_RESOLVE_LIB_DEFECTS
     *  DR 2344 quoted()'s interaction with padding is unclear
     */
    template<typename _CharT, typename _Traits>
      std::basic_ostream<_CharT, _Traits>&
      operator<<(std::basic_ostream<_CharT, _Traits>& __os,
                 const _Quoted_string<const _CharT*, _CharT>& __str)
      {
        std::basic_ostringstream<_CharT, _Traits> __ostr;
        __ostr << __str._M_delim;
        for (const _CharT* __c = __str._M_string; *__c; ++__c)
          {
            if (*__c == __str._M_delim || *__c == __str._M_escape)
              __ostr << __str._M_escape;
            __ostr << *__c;
          }
        __ostr << __str._M_delim;

        return __os << __ostr.str();
      }

    /**
     * @brief Inserter for quoted strings.
     *
     *  _GLIBCXX_RESOLVE_LIB_DEFECTS
     *  DR 2344 quoted()'s interaction with padding is unclear
     */
    template<typename _CharT, typename _Traits, typename _String>
      std::basic_ostream<_CharT, _Traits>&
      operator<<(std::basic_ostream<_CharT, _Traits>& __os,
                 const _Quoted_string<_String, _CharT>& __str)
      {
        std::basic_ostringstream<_CharT, _Traits> __ostr;
        __ostr << __str._M_delim;
        for (auto __c : __str._M_string)
          {
            if (__c == __str._M_delim || __c == __str._M_escape)
              __ostr << __str._M_escape;
            __ostr << __c;
          }
        __ostr << __str._M_delim;

        return __os << __ostr.str();
      }

    /**
     * @brief Extractor for delimited strings.
     *        The left and right delimiters can be different.
     */
    template<typename _CharT, typename _Traits, typename _Alloc>
      std::basic_istream<_CharT, _Traits>&
      operator>>(std::basic_istream<_CharT, _Traits>& __is,
                 const _Quoted_string<basic_string<_CharT, _Traits, _Alloc>&,
                                      _CharT>& __str)
      {
        _CharT __c;
        __is >> __c;
        if (!__is.good())
          return __is;
        if (__c != __str._M_delim)
          {
            __is.unget();
            __is >> __str._M_string;
            return __is;
          }
        __str._M_string.clear();
        std::ios_base::fmtflags __flags
          = __is.flags(__is.flags() & ~std::ios_base::skipws);
        do
          {
            __is >> __c;
            if (!__is.good())
              break;
            if (__c == __str._M_escape)
              {
                __is >> __c;
                if (!__is.good())
                  break;
              }
            else if (__c == __str._M_delim)
              break;
            __str._M_string += __c;
          }
        while (true);
        __is.setf(__flags);

        return __is;
      }
  } // namespace __detail

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif // C++11
#endif /* _GLIBCXX_QUOTED_STRING_H */
Revision:	1166
Committed:	Tue Oct 26 14:22:36 2021 UTC (4 years ago) by rossy
Content type:	text/x-chdr
File size:	5053 byte(s)
Log Message:	Daodan: Replace MinGW build env with an up-to-date MSYS2 env
#	Content
1	// Helpers for quoted stream manipulators -- C++ --
2
3	// Copyright (C) 2013-2021 Free Software Foundation, Inc.
4	//
5	// This file is part of the GNU ISO C++ Library. This library is free
6	// software; you can redistribute it and/or modify it under the
7	// terms of the GNU General Public License as published by the
8	// Free Software Foundation; either version 3, or (at your option)
9	// any later version.
10
11	// This library is distributed in the hope that it will be useful,
12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	// GNU General Public License for more details.
15
16	// Under Section 7 of GPL version 3, you are granted additional
17	// permissions described in the GCC Runtime Library Exception, version
18	// 3.1, as published by the Free Software Foundation.
19
20	// You should have received a copy of the GNU General Public License and
21	// a copy of the GCC Runtime Library Exception along with this program;
22	// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23	// <http://www.gnu.org/licenses/>.
24
25	/** @file bits/quoted_string.h
26	* This is an internal header file, included by other library headers.
27	* Do not attempt to use it directly. @headername{iomanip}
28	*/
29
30	#ifndef _GLIBCXX_QUOTED_STRING_H
31	#define _GLIBCXX_QUOTED_STRING_H 1
32
33	#pragma GCC system_header
34
35	#if __cplusplus < 201103L
36	# include <bits/c++0x_warning.h>
37	#else
38	#include <sstream>
39
40	namespace std _GLIBCXX_VISIBILITY(default)
41	{
42	_GLIBCXX_BEGIN_NAMESPACE_VERSION
43
44	namespace __detail {
45	/**
46	* @brief Struct for delimited strings.
47	*/
48	template<typename _String, typename _CharT>
49	struct _Quoted_string
50	{
51	static_assert(is_reference<_String>::value
52	\|\| is_pointer<_String>::value,
53	"String type must be pointer or reference");
54
55	_Quoted_string(_String __str, _CharT __del, _CharT __esc)
56	: _M_string(__str), _M_delim{__del}, _M_escape{__esc}
57	{ }
58
59	_Quoted_string&
60	operator=(_Quoted_string&) = delete;
61
62	_String _M_string;
63	_CharT _M_delim;
64	_CharT _M_escape;
65	};
66
67	#if __cplusplus >= 201703L
68	template<typename _CharT, typename _Traits>
69	struct _Quoted_string<basic_string_view<_CharT, _Traits>, _CharT>
70	{
71	_Quoted_string(basic_string_view<_CharT, _Traits> __str,
72	_CharT __del, _CharT __esc)
73	: _M_string(__str), _M_delim{__del}, _M_escape{__esc}
74	{ }
75
76	_Quoted_string&
77	operator=(_Quoted_string&) = delete;
78
79	basic_string_view<_CharT, _Traits> _M_string;
80	_CharT _M_delim;
81	_CharT _M_escape;
82	};
83	#endif // C++17
84
85	/**
86	* @brief Inserter for quoted strings.
87	*
88	* _GLIBCXX_RESOLVE_LIB_DEFECTS
89	* DR 2344 quoted()'s interaction with padding is unclear
90	*/
91	template<typename _CharT, typename _Traits>
92	std::basic_ostream<_CharT, _Traits>&
93	operator<<(std::basic_ostream<_CharT, _Traits>& __os,
94	const _Quoted_string<const _CharT*, _CharT>& __str)
95	{
96	std::basic_ostringstream<_CharT, _Traits> __ostr;
97	__ostr << __str._M_delim;
98	for (const _CharT* __c = __str._M_string; *__c; ++__c)
99	{
100	if (__c == __str._M_delim \|\| __c == __str._M_escape)
101	__ostr << __str._M_escape;
102	__ostr << *__c;
103	}
104	__ostr << __str._M_delim;
105
106	return __os << __ostr.str();
107	}
108
109	/**
110	* @brief Inserter for quoted strings.
111	*
112	* _GLIBCXX_RESOLVE_LIB_DEFECTS
113	* DR 2344 quoted()'s interaction with padding is unclear
114	*/
115	template<typename _CharT, typename _Traits, typename _String>
116	std::basic_ostream<_CharT, _Traits>&
117	operator<<(std::basic_ostream<_CharT, _Traits>& __os,
118	const _Quoted_string<_String, _CharT>& __str)
119	{
120	std::basic_ostringstream<_CharT, _Traits> __ostr;
121	__ostr << __str._M_delim;
122	for (auto __c : __str._M_string)
123	{
124	if (__c == __str._M_delim \|\| __c == __str._M_escape)
125	__ostr << __str._M_escape;
126	__ostr << __c;
127	}
128	__ostr << __str._M_delim;
129
130	return __os << __ostr.str();
131	}
132
133	/**
134	* @brief Extractor for delimited strings.
135	* The left and right delimiters can be different.
136	*/
137	template<typename _CharT, typename _Traits, typename _Alloc>
138	std::basic_istream<_CharT, _Traits>&
139	operator>>(std::basic_istream<_CharT, _Traits>& __is,
140	const _Quoted_string<basic_string<_CharT, _Traits, _Alloc>&,
141	_CharT>& __str)
142	{
143	_CharT __c;
144	__is >> __c;
145	if (!__is.good())
146	return __is;
147	if (__c != __str._M_delim)
148	{
149	__is.unget();
150	__is >> __str._M_string;
151	return __is;
152	}
153	__str._M_string.clear();
154	std::ios_base::fmtflags __flags
155	= __is.flags(__is.flags() & ~std::ios_base::skipws);
156	do
157	{
158	__is >> __c;
159	if (!__is.good())
160	break;
161	if (__c == __str._M_escape)
162	{
163	__is >> __c;
164	if (!__is.good())
165	break;
166	}
167	else if (__c == __str._M_delim)
168	break;
169	__str._M_string += __c;
170	}
171	while (true);
172	__is.setf(__flags);
173
174	return __is;
175	}
176	} // namespace __detail
177
178	_GLIBCXX_END_NAMESPACE_VERSION
179	} // namespace std
180
181	#endif // C++11
182	#endif /* _GLIBCXX_QUOTED_STRING_H */