Format
#include <wctype.h>
wint_t towctrans(wint_t wc, wctrans_t desc);Language Level: ANSI
Threadsafe: Yes.
Locale Sensitive: The behavior of this function might be affected by the LC_CTYPE category of the current locale if LOCALETYPE(*LOCALE) is specified on the compilation command. It might also be affected by the LC_UNI_CTYPE category of the current locale if either the LOCALETYPE(*LOCALEUCS2) or LOCALETYPE(*LOCALEUTF) option is specified on the compilation command. This function is not available when LOCALETYPE(*CLD) is specified on the compilation command. For more information, see Understanding CCSIDs and Locales.
Wide Character Function: See Wide Characters for more information.
Description
The towctrans() function maps the wide character wc using the mapping that is described by desc.
A towctrans(wc, wctrans("tolower")) behaves in the same way as the call to the wide-character, case-mapping function towlower().
A towctrans(wc, wctrans("toupper")) behaves in the same way as the call to the wide-character, case-mapping function towupper().
Return Value
The towctrans() function returns the mapped value of wc using the mapping that is described by desc.
Example that uses towctrans()
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
int main()
{
char *alpha = "abcdefghijklmnopqrstuvwxyz";
char *tocase[2] = {"toupper", "tolower"};
wchar_t *wcalpha;
int i, j;
size_t alphalen;
alphalen = strlen(alpha)+1;
wcalpha = (wchar_t *)malloc(sizeof(wchar_t)*alphalen);
mbstowcs(wcalpha, alpha, 2*alphalen);
for (i=0; i<2; ++i) {
printf("Input string: %ls\n", wcalpha);
for (j=0; j<strlen(alpha); ++j) {
wcalpha[j] = (wchar_t)towctrans((wint_t)wcalpha[j], wctrans(tocase[i]));
}
printf("Output string: %ls\n", wcalpha);
printf("\n");
}
return 0;
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