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archive_wide_traits.h
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    00001 /****************************************************************************
    00002 **
    00003 ** http://www.qxorm.com/
    00004 ** http://sourceforge.net/projects/qxorm/
    00005 ** Original file by Lionel Marty
    00006 **
    00007 ** This file is part of the QxOrm library
    00008 **
    00009 ** This software is provided 'as-is', without any express or implied
    00010 ** warranty. In no event will the authors be held liable for any
    00011 ** damages arising from the use of this software.
    00012 **
    00013 ** GNU Lesser General Public License Usage
    00014 ** This file must be used under the terms of the GNU Lesser
    00015 ** General Public License version 2.1 as published by the Free Software
    00016 ** Foundation and appearing in the file 'license.lgpl.txt' included in the
    00017 ** packaging of this file.  Please review the following information to
    00018 ** ensure the GNU Lesser General Public License version 2.1 requirements
    00019 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    00020 **
    00021 ** If you have questions regarding the use of this file, please contact :
    00022 ** contact@qxorm.com
    00023 **
    00024 ****************************************************************************/
    00025
    00026 #ifndef _QX_ARCHIVE_WIDE_TRAITS_H_
    00027 #define _QX_ARCHIVE_WIDE_TRAITS_H_
    00028
    00029 #ifdef _MSC_VER
    00030 #pragma once
    00031 #endif
    00032
    00040 #include <string>
    00041 #include <iostream>
    00042 #include <sstream>
    00043 #include <fstream>
    00044
    00045 #include <boost/mpl/if.hpp>
    00046 #include <boost/mpl/logical.hpp>
    00047
    00048 #include <QtCore/qstring.h>
    00049
    00050 #include <QxSerialize/boost/QxSerializeInclude.h>
    00051
    00052 namespace qx {
    00053 namespace trait {
    00054
    00059 template <typename T> struct is_archive_wide { enum { value = false }; };
    00060
    00061 #if _QX_SERIALIZE_WIDE_BINARY
    00062 template <> struct is_archive_wide<boost::archive::binary_wiarchive> { enum { value = true }; };
    00063 template <> struct is_archive_wide<boost::archive::binary_woarchive> { enum { value = true }; };
    00064 #endif // _QX_SERIALIZE_WIDE_BINARY
    00065
    00066 #if _QX_SERIALIZE_WIDE_TEXT
    00067 template <> struct is_archive_wide<boost::archive::text_wiarchive>   { enum { value = true }; };
    00068 template <> struct is_archive_wide<boost::archive::text_woarchive>   { enum { value = true }; };
    00069 #endif // _QX_SERIALIZE_WIDE_TEXT
    00070
    00071 #if _QX_SERIALIZE_WIDE_XML
    00072 template <> struct is_archive_wide<boost::archive::xml_wiarchive>    { enum { value = true }; };
    00073 template <> struct is_archive_wide<boost::archive::xml_woarchive>    { enum { value = true }; };
    00074 #endif // _QX_SERIALIZE_WIDE_XML
    00075
    00076 template <typename T>
    00077 class archive_wide_traits
    00078 {
    00079
    00080 public:
    00081
    00082    enum { is_wide = qx::trait::is_archive_wide<T>::value };
    00083
    00084    typedef typename boost::mpl::if_c<is_wide, wchar_t, char>::type type_char;
    00085    typedef typename boost::mpl::if_c<is_wide, std::wstring, std::string>::type type_string;
    00086
    00087    typedef typename boost::mpl::if_c<is_wide, std::wistream, std::istream>::type type_istream;
    00088    typedef typename boost::mpl::if_c<is_wide, std::wostream, std::ostream>::type type_ostream;
    00089
    00090    typedef typename boost::mpl::if_c<is_wide, std::wstringstream, std::stringstream>::type type_stringstream;
    00091    typedef typename boost::mpl::if_c<is_wide, std::wistringstream, std::istringstream>::type type_istringstream;
    00092    typedef typename boost::mpl::if_c<is_wide, std::wostringstream, std::ostringstream>::type type_ostringstream;
    00093
    00094    typedef typename boost::mpl::if_c<is_wide, std::wfstream, std::fstream>::type type_fstream;
    00095    typedef typename boost::mpl::if_c<is_wide, std::wifstream, std::ifstream>::type type_ifstream;
    00096    typedef typename boost::mpl::if_c<is_wide, std::wofstream, std::ofstream>::type type_ofstream;
    00097
    00098    static inline QString toQString(const type_string & str)                   { return cvtQString<is_wide, 0>::toQString(str); }
    00099    static inline void fromQString(const QString & str, type_string & result)  { cvtQString<is_wide, 0>::fromQString(str, result); }
    00100
    00101    static inline QByteArray toQByteArray(const type_string & str, type_string * owner) { return cvtQByteArray<is_wide, 0>::toQByteArray(str, owner); }
    00102    static inline void fromQByteArray(const QByteArray & data, type_string & result)    { cvtQByteArray<is_wide, 0>::fromQByteArray(data, result); }
    00103
    00104 private:
    00105
    00106    template <bool isWide /* = false */, int dummy>
    00107    struct cvtQString
    00108    {
    00109       static inline QString toQString(const std::string & str)                   { return QString::fromStdString(str); }
    00110       static inline void fromQString(const QString & str, std::string & result)  { result = str.toStdString(); }
    00111    };
    00112
    00113    template <int dummy>
    00114    struct cvtQString<true, dummy>
    00115    {
    00116       static inline QString toQString(const std::wstring & str)                     { return QString::fromStdWString(str); }
    00117       static inline void fromQString(const QString & str, std::wstring & result)    { result = str.toStdWString(); }
    00118    };
    00119
    00120    template <bool isWide /* = false */, int dummy>
    00121    struct cvtQByteArray
    00122    {
    00123       static inline QByteArray toQByteArray(const std::string & str, std::string * owner)
    00124       { if (owner) { (* owner) = str; }; return (owner ? QByteArray::fromRawData(owner->data(), owner->size()) : QByteArray(str.data(), str.size())); }
    00125       static inline void fromQByteArray(const QByteArray & data, std::string & result)
    00126       { result.clear(); result.append(data.constData(), data.size()); }
    00127    };
    00128
    00129    template <int dummy>
    00130    struct cvtQByteArray<true, dummy>
    00131    {
    00132       static inline QByteArray toQByteArray(const std::wstring & str, std::wstring * owner)
    00133       { Q_UNUSED(owner); return QString::fromStdWString(str).toUtf8(); }
    00134       static inline void fromQByteArray(const QByteArray & data, std::wstring & result)
    00135       { result = QString::fromUtf8(data.constData(), data.size()).toStdWString(); }
    00136    };
    00137
    00138 };
    00139
    00140 } // namespace trait
    00141 } // namespace qx
    00142
    00143 #endif // _QX_ARCHIVE_WIDE_TRAITS_H_

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