What is the proper way to convert an int to wchar_t?

Question

Say you have "methods"

int Read(...)
{
    unsigned char Byte = 0;
    if(!ReadFile(.., &byte, 1,...))
        return -1;

    return Byte;
}


int ReadBlock(LPWSTR buffer, int cchBuffer ...)
{
    int c = 0;
    int cnt = 0;
    do
    {
        if( (c=Read(...)) != -1 )
            buffer[num++] = c; // Here.
    } while( num < ccBuffer );
    return cnt;
}

What is the proper way to get that int correctly to WCHAR?

What's wrong with what you have? – Kerrek SB Aug 21 '12 at 12:50 — Kerrek SB, Aug 21 '12 at 12:50
Whats wrong with `(wchar_t)the_int` ? – Neel Basu Aug 21 '12 at 13:07 — Neel Basu, Aug 21 '12 at 13:07

MSalters · Answer 1 · 2012-08-23T07:49:48.413

2

Use mbstowcs (multibyte string to wide character string) :

int ReadBlock(LPWSTR buffer, int cchBuffer ...)
{
    int c = 0;
    std::vector<char> narrow;
    while((c=Read(...)) != -1 )
       narrow.push_back(c);
    }
    narrow.push_back(0);
    mbstowcs(buffer, &narrow.front(), cchBuffer);
}

mbstowcs uses the current locale, so that should match the encoding of your input.

edited Aug 23 '12 at 07:49

answered Aug 21 '12 at 13:21

MSalters

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@yanbellavance: Sounds weird. Write a small program that demonstrates the problem, and you can then ask a new question. But you probably will find out the problem yourself when you try to isolate the problem. – MSalters Apr 15 '14 at 19:31

score 1 · Answer 2 · answered Aug 21 '12 at 13:33

1

convert char <= => wchar
in windows:
MultiByteToWideChar
WideCharToMultiByte

in linux:
mbsrtowcs
wcsrtombs

answered Aug 21 '12 at 13:33

chlaws

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4

score 0 · Answer 3 · answered Aug 21 '12 at 13:12

0

#include<tchar.h>

int main()
{
    int integer = 0;
    wchar_t wideCharacter = (wchar_t)integer;

    return 0;

}

answered Aug 21 '12 at 13:12

Software_Designer

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score 0 · Accepted Answer · edited May 23 '17 at 10:34

0

After reading When should static_cast, dynamic_cast and reinterpret_cast be used?, I realize it was my lack of knowledge about casting that triggered me to ask this question.

edited May 23 '17 at 10:34

Community

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answered Sep 03 '12 at 06:37

CS.

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What is the proper way to convert an int to wchar_t?

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