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 <errno.h>
27 #include <widec.h>
28 #include "common_def.h"
29 #include "common_han.h"
30 #include "ojh_utf_api.h"
31
32
33 /**** _ I C V _ O P E N ****/
34
_icv_open()35 void* _icv_open()
36 {
37 return((void*)MAGIC_NUMBER);
38 } /* end of int _icv_open(). */
39
40
41 /**** _ I C V _ C L O S E ****/
42
_icv_close(int * cd)43 void _icv_close(int* cd)
44 {
45 if (!cd || cd != (int*)MAGIC_NUMBER)
46 errno = EBADF;
47 } /* end of void _icv_close(int*). */
48
49
50 /**** _ I C V _ I C O N V ****/
51
_icv_iconv(int * cd,char ** inbuf,size_t * inbufleft,char ** outbuf,size_t * outbufleft)52 size_t _icv_iconv(int* cd, char** inbuf, size_t* inbufleft,
53 char** outbuf, size_t* outbufleft)
54 {
55 size_t ret_val = 0;
56 unsigned char* ib;
57 unsigned char* ob;
58 unsigned char* ibtail;
59 unsigned char* obtail;
60
61 if (!cd || cd != (int*)MAGIC_NUMBER)
62 {
63 errno = EBADF;
64 return((size_t)-1);
65 }
66
67 if (!inbuf || !(*inbuf))
68 return((size_t)0);
69
70 ib = (unsigned char*)*inbuf;
71 ob = (unsigned char*)*outbuf;
72 ibtail = ib + *inbufleft;
73 obtail = ob + *outbufleft;
74
75 while (ib < ibtail)
76 {
77 if (*ib & 0x80) /* Korean Johap code */
78 {
79 hcode_type ojh_code, utf_code;
80
81 if ((ibtail - ib) < 2)
82 {
83 errno = EINVAL;
84 ret_val = (size_t)-1;
85 break;
86 }
87
88 ojh_code.code = 0;
89 ojh_code.byte.byte3 = *ib;
90 ojh_code.byte.byte4 = *(ib + 1);
91
92 utf_code = _johap82_to_utf8(ojh_code);
93
94 if (utf_code.code != 0)
95 {
96 if ((obtail - ob) < 3)
97 {
98 errno = E2BIG;
99 ret_val = (size_t)-1;
100 break;
101 }
102 /* UTF8 code from 2 bytes is always 3 bytes */
103 *ob++ = (char)utf_code.byte.byte2;
104 *ob++ = (char)utf_code.byte.byte3;
105 *ob++ = (char)utf_code.byte.byte4;
106 }
107 else /* FAILED - this means input char isn't belong to
108 * input codeset. */
109 {
110 errno = EILSEQ;
111 ret_val = (size_t)-1;
112 break;
113 }
114 ib += 2;
115
116 }
117 else /* CS0 */
118 {
119 if (ob >= obtail)
120 {
121 errno = E2BIG;
122 ret_val = (size_t)-1;
123 break;
124 }
125 *ob++ = *ib++;
126 }
127 }
128
129 *inbuf = (char*)ib;
130 *inbufleft = ibtail - ib;
131 *outbuf = (char*)ob;
132 *outbufleft = obtail - ob;
133
134 return(ret_val);
135 } /* end of size_t _icv_iconv(int*, char**, size_t*, char**, size_t*). */
136