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) 1994, Sun Microsystems, Inc.
23 * Copyright (c) 1994, Nihon Sun Microsystems K.K.
24 */
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <errno.h>
29 #include <euc.h>
30 #include "japanese.h"
31 #include "table.maz.is2.c"
32
33 /*
34 * struct _cv_state; to keep status
35 */
36 struct _icv_state {
37 int _st_cset;
38 int _st_stat;
39 };
40
41 extern int errno;
42
43 /*
44 * Open; called from iconv_open(); as taken unchanged from @(#)ISO-2022-JP%SJIS.
45 */
46 void *
_icv_open()47 _icv_open()
48 {
49 struct _icv_state *st;
50
51 if ((st = (struct _icv_state *)malloc(sizeof(struct _icv_state)))
52 == NULL)
53 return ((void *)ERR_RETURN);
54
55 st->_st_cset = CS_0;
56 st->_st_stat = ST_INIT;
57
58 return (st);
59 }
60
61
62 /*
63 * Close; called from iconv_close(); as taken unchanged from @(#)ISO-2022-JP%SJIS.
64 */
65 void
_icv_close(struct _icv_state * st)66 _icv_close(struct _icv_state *st)
67 {
68 free(st);
69 }
70
71
72
73 /*
74 * Actual conversion; called from iconv()
75 */
76 size_t
_icv_iconv(struct _icv_state * st,char ** inbuf,size_t * inbytesleft,char ** outbuf,size_t * outbytesleft)77 _icv_iconv(struct _icv_state *st, char **inbuf, size_t *inbytesleft,
78 char **outbuf, size_t *outbytesleft)
79 {
80 int cset, stat;
81 unsigned char *op, ic;
82 char *ip;
83 size_t ileft, oleft;
84 size_t retval;
85
86 cset = st->_st_cset;
87 stat = st->_st_stat;
88
89 if ((inbuf == 0) || (*inbuf == 0)) {
90 cset = CS_0;
91 stat = ST_INIT;
92 op = (unsigned char *)*outbuf;
93 oleft = *outbytesleft;
94 retval = 0;
95 goto ret2;
96 }
97
98 ip = *inbuf;
99 op = (unsigned char *)*outbuf;
100 ileft = *inbytesleft;
101 oleft = *outbytesleft;
102
103 /* Everything down to here was taken unchanged from @(#)ISO-2022-JP%SJIS.
104 =======================================================================
105
106 *
107 * Main loop; basically 1 loop per 1 input byte
108 */
109
110 while (ileft > 0)
111 {
112 GET(ic);
113 /*
114 If the char is one of the following [ / ] { | } then convert
115 it to its corresponding value. In all other cases if the char
116 is greater than octal \178 ( ie a high bit char) convert it
117 to an underscore (_), as it has no mapping to 7 bit ASCII.
118 Otrherwise the char is the same in both cose sets.
119 */
120 ic=__maz_to_is2[ic];
121
122
123 PUT(ic);
124 /*
125 Put the converted character into the output buffer, and decrement
126 the count of chars left in both the in and out buffers.
127 If we have no space left in the out buffer, but we have no reached
128 the end of the input buffer. We return what we have, and set the
129 errno (Error) to E2BIG.
130 */
131 if ((oleft < 1) && (ileft > 0))
132 {
133 errno = E2BIG;
134 retval = ERR_RETURN;
135 goto ret;
136 }
137
138
139 }
140 /*
141 We only get here if the end of the in buffer has been reached, we therefore return the
142 value 0 to denote that we have sucesfully converted the inbuffer.
143 */
144 retval = ileft;
145
146 /* Taken unchanged from @(#)ISO-2022-JP%SJIS. */
147
148 ret:
149 st->_st_cset = cset;
150 st->_st_stat = stat;
151 *inbuf = ip;
152 *inbytesleft = ileft;
153 ret2:
154 *outbuf = (char *)op;
155 *outbytesleft = oleft;
156
157 return (retval);
158 }
159