How to set up libconv in visual c++

This is a discussion on How to set up libconv in visual c++ within the C++ Programming forums, part of the General Programming Boards category; I need to convert the gb2312 encoding to utf_8 , and i have learned that libconv can help me to ...

  1. #1
    Registered User
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    How to set up libconv in visual c++

    I need to convert the gb2312 encoding to utf_8 , and i have learned that libconv can help me to do that , but my problem is how to set up the library in visual c++ . IS there any tutorial?

  2. #2
    a_capitalist_story
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    This blog post, found with this Google search might help.

  3. #3
    Registered User Codeplug's Avatar
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    If you're not trying to write something portable, then you can use the following Windows specific code:
    Code:
    #include <windows.h>
    #include <string>
    #include <vector>
    
    std::wstring str_to_wstr(const std::string &str, UINT cp = CP_ACP)
    {
        int len = MultiByteToWideChar(cp, 0, str.c_str(), str.length(), 0, 0);
        if (!len)
            return L"ErrorA2W";
    
        std::vector<wchar_t> wbuff(len + 1);
        // NOTE: this does not NULL terminate the string in wbuff, but this is ok
        //       since it was zero-initialized in the vector constructor
        if (!MultiByteToWideChar(cp, 0, str.c_str(), str.length(), &wbuff[0], len))
            return L"ErrorA2W";
    
        return &wbuff[0];
    }//str_to_wstr
    
    std::string wstr_to_str(const std::wstring &wstr, UINT cp = CP_ACP)
    {
        int len = WideCharToMultiByte(cp, 0, wstr.c_str(), wstr.length(), 
                                      0, 0, 0, 0);
        if (!len)
            return "ErrorW2A";
    
        std::vector<char> abuff(len + 1);
    
        // NOTE: this does not NULL terminate the string in abuff, but this is ok
        //       since it was zero-initialized in the vector constructor
        if (!WideCharToMultiByte(cp, 0, wstr.c_str(), wstr.length(), 
            &abuff[0], len, 0, 0))
        {
            return "ErrorW2A";
        }//if
    
        return &abuff[0];
    }//wstr_to_str
    Windows codepage 936 is for GBK, which is an extension of GB2312.
    Code:
        string gbk;
        ...
        wstring utf16 = str_to_wstr(gbk, 936);
        string utf8 = wstr_to_str(utf16, CP_UTF8);
    gg

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