C/C++ I18N mbstowcs question
- by bogertron
I am working on internationalizing the input for a C/C++ application. I have currently hit an issue with converting from a multi-byte string to wide character string.
The code needs to be cross platform compatible, so I am using mbstowcs and wcstombs as much as possible.
I am currently working on a WIN32 machine and I have set the locale to a non-english locale (Japanese).
When I attempt to convert a multibyte character string, I seem to be having some conversion issues.
Here is an example of the code:
int main(int argc, char** argv)
{
wchar_t *wcsVal = NULL;
char *mbsVal = NULL;
/* Get the current code page, in my case 932, runs only on windows */
TCHAR szCodePage[10];
int cch= GetLocaleInfo(
GetSystemDefaultLCID(),
LOCALE_IDEFAULTANSICODEPAGE,
szCodePage,
sizeof(szCodePage));
/* verify locale is set */
if (setlocale(LC_CTYPE, "") == 0)
{
fprintf(stderr, "Failed to set locale\n");
return 1;
}
mbsVal = argv[1];
/* validate multibyte string and convert to wide character */
int size = mbstowcs(NULL, mbsVal, 0);
if (size == -1)
{
printf("Invalid multibyte\n");
return 1;
}
wcsVal = (wchar_t*) malloc(sizeof(wchar_t) * (size + 1));
if (wcsVal == NULL)
{
printf("memory issue \n");
return 1;
}
mbstowcs(wcsVal, szVal, size + 1);
wprintf(L"%ls \n", wcsVal);
return 0;
}
At the end of execution, the wide character string does not contain the converted data. I believe that there is an issue with the code page settings, because when i use MultiByteToWideChar and have the current code page sent in
EX:
MultiByteToWideChar(
CP_ACP,
0,
mbsVal,
-1,
wcsVal,
size + 1
);
in place of the mbstowcs calls, the conversion succeeds.
My question is, how do I use the generic mbstowcs call instead of teh MuliByteToWideChar call?
