src/u16_wcsspn.c


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/*******************************************************************/
/*  u16ports: u16 variants of wide character string functions.     */
/*  Copyright (C) 2017  SysDeer Technologies, LLC                  */
/*  Released under the Standard MIT License; see COPYING.U16PORTS. */
/*******************************************************************/

#include <stdint.h>
#include <u16ports/u16ports.h>

size_t u16_wcsspn(const uint16_t * wstr, const uint16_t * cstr)
{
	const uint16_t * wch;
	const uint16_t * wcs;

        for (wcs=wstr; *wcs; wcs++)
		for (wch=cstr; *wch!=*wcs; wch++)
			if (!*wch)
				return wcs - wstr;


        return wcs - wstr;
}