fusl/src/stdio/fwide.c

#include "stdio_impl.h"
#include "locale_impl.h"

int fwide(FILE* f, int mode) {
  FLOCK(f);
  if (mode) {
    if (!f->locale)
      f->locale = MB_CUR_MAX == 1 ? C_LOCALE : UTF8_LOCALE;
    if (!f->mode)
      f->mode = mode > 0 ? 1 : -1;
  }
  mode = f->mode;
  FUNLOCK(f);
  return mode;
}