60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
#ifndef WIDEN_H
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#define WIDEN_H
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#include "../application/global.h"
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#include <string>
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#include <vector>
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#include <locale>
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#include <functional>
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#include <iostream>
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namespace ConversionUtilities
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{
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/*!
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* Converts a std::string to std::wstring.
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*/
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template<class E, class T = std::char_traits<E>, class A = std::allocator<E> >
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class LIB_EXPORT Widen : public std::unary_function<
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const std::string&, std::basic_string<E, T, A> >
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{
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public:
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/*!
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* Constructs a new instance.
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*/
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Widen(const std::locale& loc = std::locale()) :
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m_loc(loc)
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{
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#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6.0...
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using namespace std;
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m_pctype = &_USE(loc, ctype<E> );
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#else
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m_pctype = &std::use_facet<std::ctype<E> >(loc);
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#endif
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}
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Widen(const Widen &) = delete;
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Widen& operator= (const Widen &) = delete;
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/*!
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* Performs the conversation for the provided \a string.
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*/
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std::basic_string<E, T, A> operator() (const std::string& string) const
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{
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typename std::basic_string<E, T, A>::size_type srcLen = string.length();
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const char *srcBeg = string.c_str();
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std::vector<E> tmp(srcLen);
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m_pctype->widen(srcBeg, srcBeg + srcLen, &tmp[0]);
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return std::basic_string<E, T, A>(&tmp[0], srcLen);
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}
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private:
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std::locale m_loc;
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const std::ctype<E>* m_pctype;
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};
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}
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#endif // WIDEN_H
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