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#include <wchar.h>
#include "stdio_impl.h"

#define SH (8*sizeof(int)-1)
#define NORMALIZE(x) ((x)>>SH | -((-(x))>>SH))

int fwide(FILE *f, int mode)
{
	FLOCK(f);
	if (!f->mode) f->mode = NORMALIZE(mode);
	mode = f->mode;
	FUNLOCK(f);
	return mode;
}