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) 2008, by Sun Microsystems, Inc.
23 * All rights reserved.
24 */
25
26 #include <stdio.h>
27 #include <errno.h>
28 #include <stdlib.h>
29 #include <sys/types.h>
30 #define __NEED_VISCII_2_TCVN__
31 #include <viscii_tcvn.h> /* VISCII <-> TCVN mapping table */
32 #include "common_defs.h"
33
34
35 #define NON_ID_CHAR '?' /* non-identified character */
36
37 typedef struct _icv_state {
38 int _errno; /* internal errno */
39 } _iconv_st;
40
41
42 /*
43 * Open; called from iconv_open()
44 */
45 void *
_icv_open()46 _icv_open()
47 {
48 _iconv_st *st;
49
50 if ((st = (_iconv_st *)malloc(sizeof(_iconv_st))) == NULL) {
51 errno = ENOMEM;
52 return ((void *) -1);
53 }
54 st->_errno = 0;
55 return ((void *) st);
56 }
57
58
59 /*
60 * Close; called from iconv_close()
61 */
62 void
_icv_close(_iconv_st * st)63 _icv_close(_iconv_st *st)
64 {
65 if (!st)
66 errno = EBADF;
67 else
68 free(st);
69 }
70
71
72 /*
73 * Actual conversion; called from iconv()
74 */
75 size_t
_icv_iconv(_iconv_st * st,char ** inbuf,size_t * inbytesleft,char ** outbuf,size_t * outbytesleft)76 _icv_iconv(_iconv_st *st, char **inbuf, size_t *inbytesleft,
77 char **outbuf, size_t *outbytesleft)
78 {
79 int unconv = 0;
80 #ifdef DEBUG
81 fprintf(stderr, "========== iconv(): viscii -->tcvn ==========\n");
82 #endif
83 if (st == NULL) {
84 errno = EBADF;
85 return ((size_t) -1);
86 }
87
88 if (inbuf == NULL || *inbuf == NULL) { /* Reset request. */
89 st->_errno = 0;
90 return ((size_t) 0);
91 }
92
93 st->_errno = 0; /* reset internal errno */
94 errno = 0; /* reset external errno */
95
96 /* convert viscii encoding to tcvn. */
97 while (*inbytesleft > 0 && *outbytesleft > 0) {
98 unsigned char ch = 0;
99
100 viscii_2_tcvn((unsigned char*)*inbuf, &ch);
101 if (**inbuf != 0x0 && ch == 0) {
102 unconv++;
103 ch = NON_ID_CHAR;
104 }
105
106 **outbuf = ch;
107 (*outbuf) += 1;
108 (*outbytesleft) -= 1;
109 (*inbuf)++;
110 (*inbytesleft)--;
111
112 }
113
114 if ( *inbytesleft > 0 && *outbytesleft <= 0 ) {
115 errno = E2BIG;
116 return ((size_t)-1);
117 }
118
119 return ((size_t)unconv);
120
121
122 }
123