sj4/lib/sj3core/hzstrlen.c

/*
 * Copyright (c) 1991-1994  Sony Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL SONY CORPORATION BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of Sony Corporation
 * shall not be used in advertising or otherwise to promote the sale, use
 * or other dealings in this Software without prior written authorization
 * from Sony Corporation.
 *
 */

/*
 * $SonyRCSfile: hzstrlen.c,v $
 * $SonyRevision: 1.1 $
 * $SonyDate: 1994/06/03 08:01:52 $
 */

#include "sj_euc.h"
#include "sj_rename.h"
#include "sj_typedef.h"
#include "sj_const.h"
#include "sj_dict.h"

#include "sj_kanakan.h"

int euc_codesize(u_char c) {
	if((c & KANJIMODEMASK) == 0x90) {
		return 1;
	} else if(isknj1(c)) {
		return 2;
	} else if(c == SS3) {
		return 3;
	} else {
		return 1;
	}
}

int hzstrlen(u_char* ptr, int len) {
	u_char* head;

	head = ptr;

	while(len-- > 0) ptr += euc_codesize(*ptr);

	return (ptr - head);
}