Re: How to convert const char * to wchar_t

"Manni" <manujsabarwal@gmail.com> ha scritto nel messaggio
news:1c420830-306c-4435-aa12-c7751db9ef07@p10g2000prm.googlegroups.com...


To convert from char* (ANSI/MBCS) strings to wchar_t* (Unicode UTF-16)
strings, you could use CStringW constructor overload, or CA2W helper class,
or the "raw" Win32 API ::MultiByteToWideChar.

Here is a sample compilable code that shows you a possible way to convert
from char** argv to a WCHAR** 'argv':

<code>
//////////////////////////////////////////////////////////////////////////
// test1.cpp

#include <iostream> // Console output
#include <vector> // Vector container
#include <atlstr.h> // CStringW

using std::cout;
using std::wcout;
using std::endl;

//
// Prints strings stored in argv
//
void TestUnicodeArgv( WCHAR **argv )
{
    wcout << endl;
    wcout << "*** Unicode strings:" << endl;
    WCHAR ** p = argv;
    while ( *p != NULL )
    {
        wcout << *p << endl;
        ++p;
    }
    wcout << "----------" << endl;
}

//
// MAIN
//
int main(int argc, char * argv[])
{
    //
    // Convert strings from ANSI/MBCS
    // to Unicode UTF16, storing them in a vector container
    //
    std::vector< CStringW > unicodeStrings;
    unicodeStrings.reserve( argc );
    for ( int i = 0; i < argc; i++ )
    {
        unicodeStrings.push_back( CStringW( argv[i] ) );
    }

    //
    // Build an array of pointers to Unicode strings,
    // NULL terminated
    //
    const int count = argc;
    std::vector< WCHAR * > unicodeStringPtrs;
    unicodeStringPtrs.reserve( count + 1 );
    for (int i = 0; i < count; i++)
    {
        unicodeStringPtrs.push_back( const_cast<WCHAR
*>(unicodeStrings[i].GetString()) );
    }
    // Terminate with NULL
    unicodeStringPtrs.push_back( NULL );

    // Call the test function
    TestUnicodeArgv( &unicodeStringPtrs[0] );

    return 0;
}

</code>

HTH,
Giovanni