xref: /illumos-gate/usr/src/lib/iconv_modules/ko/common/utf_to_ojh_sub.c (revision 933ae53f0bf0708d7bf2756d3f21936a0d5fad82)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright (c) 1996 by Sun Microsystems, Inc.
23  */
24 
25 
26 #include "common_def.h"
27 #include "common_han.h"
28 #include "common_utf.h"
29 
30 /****  _ U T F 8 _ T O _ J O H A P 8 2 ****/
31 
32 hcode_type _utf8_to_johap82(hcode_type utfcode)
33 {
34 	/* Only for Hangul character */
35 	hcode_type johap, unicode;
36 
37 	unicode = _utf8_to_uni(utfcode);
38 
39 	if ((UNICODE_HANGUL_START <= unicode.code) &&
40 	    (unicode.code <= UNICODE_HANGUL_END)) {
41 		/* Hangul Area */
42 		unsigned int uni, x, y, z;
43 
44 		uni  = unicode.code - 0xAC00;
45 		x = uni / 588;
46 			/* 588 = 21(Joongsung Number) * 28(Jongsung Number) */
47 		y = (uni % 588) / 28;
48 		z = (uni % 588) % 28;
49 
50 		johap.code = 0;
51 		johap.johap.msb = 1;
52 		johap.johap.chosung = x + 0x0A;
53 		johap.johap.joongsung =
54 			y == 0x14 ? y + 9 :
55 			y > 0x10 ? y + 8 :
56 			y > 0x0D ? y + 7 :
57 			y > 0x0A ? y + 6 :
58 			y > 0x07 ? y + 5 :
59 			y > 0x04 ? y + 4 :
60 			y > 0x01 ? y + 3 : y + 2;
61 		johap.johap.jongsung = z + 1;
62 
63 		return(johap);
64 
65 	} else {
66 		johap.code = NON_ID_CHAR; /* initial & default set to fail value */
67 
68 		return(johap);
69 	}
70 
71 
72 }  /* end of hcode_type _utf8_to_johap82(hcode_type utfcode) */
73