windows unicode和多字节字符集转换示例

windows unicode和多字节字符集转换示例

VS: [项目属性]->[配置属性]->[常规]->[字符集]
在该属性中选择"使用多字节字符集"或者"使用Unicode字符集" 本代码段均可处理

使用Windows方法 WideCharToMultiByte()和MultiByteToWideChar

#include <string>
#include <iostream>

#ifdef _WIN32
#include <windows.h>

std::string WcharToChar(const wchar_t* wp, size_t encode)
{
    std::string str;
    int len = WideCharToMultiByte((UINT)encode, 0, wp, (int)wcslen(wp), NULL, 0, NULL, NULL);
    char *m_char = new char[len + 1];
    WideCharToMultiByte((UINT)encode, 0, wp, (int)wcslen(wp), m_char, len, NULL, NULL);
    m_char[len] = '\0';
    str = m_char;
    delete m_char;
    return str;
}

std::wstring CharToWchar(const char* c, size_t encode)
{
    std::wstring str;
    int len = MultiByteToWideChar((UINT)encode, 0, c, (int)strlen(c), NULL, 0);
    wchar_t* m_wchar = new wchar_t[len + 1];
    MultiByteToWideChar((UINT)encode, 0, c, (int)strlen(c), m_wchar, len);
    m_wchar[len] = '\0';
    str = m_wchar;
    delete m_wchar;
    return str;
}
#endif  // _WIN32

int main(int argc, char *argv[])
{
#ifdef _WIN32

    std::string str_test = "hello world.";
    std::wstring wstr = CharToWchar(str_test.c_str(), CP_ACP);
    std::wcout << wstr << std::endl;

#endif // _WIN32

    return 0;
}

也可使用C库函数 size_t mbstowcs(schar_t *pwcs, const char *str, size_t n)和size_t wcstombs(char *str, const wchar_t *pwcs, size_t n)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
std::wstring CharToWchar(const std::string& orig)
{
    size_t origsize = orig.length() + 1;
    size_t convertedChars = 0;
    int len = sizeof(wchar_t) * (orig.length() - 1);
    wchar_t* wcstring = new wchar_t[len + 1];
    mbstowcs_s(&convertedChars, wcstring, origsize, orig.c_str(), _TRUNCATE);
    wcstring[len] = '\0';
    std::wstring wstr = wcstring;
    delete wcstring;
    return wstr;
}