/********************************************************/

/*  ntapi: Native API core library                      */

/*  Copyright (C) 2013--2021  Z. Gilboa                 */

/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */

/********************************************************/

#include <psxtypes/psxtypes.h>

#include <ntapi/nt_string.h>

#include "ntapi_impl.h"

size_t __cdecl __ntapi_tt_string_null_offset_multibyte(

	__in	const char *	str)

{

	const char *		cap;

	const uintptr_t *	ptr;

	#define HIGH_BIT_TEST	(uintptr_t)0x0101010101010101

	#define	AND_BITS	(uintptr_t)0x8080808080808080

	cap = str;

	while ((uintptr_t)cap % sizeof(uintptr_t)) {

		if (!(*cap))

			return cap - str;

		cap++;

	}

	ptr = (uintptr_t *)cap;

	while (!((*ptr - HIGH_BIT_TEST) & ~(*ptr) & AND_BITS))

		ptr++;

	cap = (const char *)ptr;

	while (*cap)

		cap++;

	return cap - str;

}

size_t __cdecl __ntapi_tt_string_null_offset_short(

	__in	const int16_t *	str)

{

	const int16_t *	cap;

	cap = str;

	while (*cap)

		cap++;

	return (size_t)cap - (size_t)str;

}

size_t __cdecl __ntapi_tt_string_null_offset_dword(

	__in	const int32_t *	str)

{

	const int32_t *	cap;

	cap = str;

	while (*cap)

		cap++;

	return (size_t)cap - (size_t)str;

}

size_t __cdecl __ntapi_tt_string_null_offset_qword(

	__in	const int64_t *	str)

{

	const int64_t *	cap;

	cap = str;

	while (*cap)

		cap++;

	return (size_t)cap - (size_t)str;

}

size_t __cdecl __ntapi_tt_string_null_offset_ptrsize(

	__in	const intptr_t *str)

{

	const intptr_t * cap;

	cap = str;

	while (*cap)

		cap++;

	return (size_t)cap - (size_t)str;

}

size_t __cdecl __ntapi_tt_wcslen(const wchar16_t * str)

{

	size_t len;

	len = __ntapi_tt_string_null_offset_short((const int16_t *)str);

	return len / 2;

}