6.23.56 wcsxfrm Function

Transforms a wide string based on locale.

Include

<wchar.h>

Prototype

size_t wcsxfrm( wchar_t * restrict s1, const wchar_t * restrict s2, size_t n);

Arguments

s1

the array to hold the transformed wide string

s2

the wide string to transform

n

the maximum number of wide characters to transform

Return Value

The function returns the length of the transformed wide string (not including the terminating null wide character). If the value returned is n or greater, the contents of the array pointed to by s1 are indeterminate.

Remarks

The function transforms the wide string pointed by s2 according to the current locale and places no more than n wide characters of the result and a terminating null wide character into the array pointed to by s1. A null pointer may be specified for s1 if n is zero, in which case the function can be used to obtain the size of the transformed wide string.

Example

#include <wchar.h>
#include <stdio.h>

int main(void)
{
   wchar_t * wcs;
   wchar_t  buffer[40];
   int      length;

   printf("Enter a wide string\n");
   wcs = fgetws(buffer, 40, stdin);
   length = wcsxfrm(NULL, wcs, 0);
   printf("string length once transformed to current locale: %d\n", length);
}

Example Output

The output of this program might vary based on the LC_COLLATE category of the current locale.