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_thai.h"
30#include "euc_utf_api.h"
31
32
33/****  _ I C V _ O P E N  ****/
34
35void* _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
43void _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
52size_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)  /* Thai EUC doesn't have CS2 or CS3. */
78		{
79			hcode_type euc_code, utf_code;
80
81			if ((ibtail - ib) < 1)
82			{
83				errno = EINVAL;
84				ret_val = (size_t)-1;
85				break;
86			}
87
88			if ((*ib < 0xA1) ||
89			    (*ib > 0xFB) ||
90			    ((*ib > 0xDC) && (*ib < 0xDE)))
91			{
92				errno = EILSEQ;
93				ret_val = (size_t)-1;
94				break;
95			}
96
97			euc_code.code = 0;
98			euc_code.byte.byte4 = *ib;
99
100			utf_code = _eucTH_to_utf8(euc_code);
101
102			if (utf_code.code != 0)
103			{
104				if ((obtail - ob) < 3)
105				{
106					errno = E2BIG;
107					ret_val = (size_t)-1;
108					break;
109				}
110				/* UTF8 code from 2 bytes is always 3 bytes */
111				*ob++ = (char)utf_code.byte.byte2;
112				*ob++ = (char)utf_code.byte.byte3;
113				*ob++ = (char)utf_code.byte.byte4;
114			}
115			else  /* FAILED - this means input char isn't belong to
116			       *	  input codeset. */
117			{
118				errno = EILSEQ;
119				ret_val = (size_t)-1;
120				break;
121			}
122			ib += 1;
123
124		}
125		else  /* CS0 */
126		{
127			if (ob >= obtail)
128			{
129				errno = E2BIG;
130				ret_val = (size_t)-1;
131				break;
132			}
133			*ob++ = *ib++;
134		}
135	}
136
137	*inbuf = (char*)ib;
138	*inbufleft = ibtail - ib;
139	*outbuf = (char*)ob;
140	*outbufleft = obtail - ob;
141
142	return(ret_val);
143}  /* end of size_t _icv_iconv(int*, char**, size_t*, char**, size_t*). */
144