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
32 /*
33 * struct _cv_state; to keep status
34 */
35 struct _icv_state {
36 int _st_cset;
37 int _st_stat;
38 };
39
40 extern int errno;
41
42 /*
43 * Open; called from iconv_open(); as taken unchanged from @(#)ISO-2022-JP%SJIS.
44 */
45 void *
_icv_open()46 _icv_open()
47 {
48 struct _icv_state *st;
49
50 if ((st = (struct _icv_state *)malloc(sizeof(struct _icv_state)))
51 == NULL)
52 return ((void *)ERR_RETURN);
53
54 st->_st_cset = CS_0;
55 st->_st_stat = ST_INIT;
56
57 return (st);
58 }
59
60
61 /*
62 * Close; called from iconv_close(); as taken unchanged from @(#)ISO-2022-JP%SJIS.
63 */
64 void
_icv_close(struct _icv_state * st)65 _icv_close(struct _icv_state *st)
66 {
67 free(st);
68 }
69
70
71
72 /*
73 * Actual conversion; called from iconv()
74 */
75 size_t
_icv_iconv(struct _icv_state * st,char ** inbuf,size_t * inbytesleft,char ** outbuf,size_t * outbytesleft)76 _icv_iconv(struct _icv_state *st, char **inbuf, size_t *inbytesleft,
77 char **outbuf, size_t *outbytesleft)
78 {
79 int cset, stat;
80 unsigned char *op, ic;
81 char *ip;
82 size_t ileft, oleft;
83 size_t retval;
84
85 cset = st->_st_cset;
86 stat = st->_st_stat;
87
88 /*
89 * If (inbuf == 0 || *inbuf == 0) then this conversion is
90 * placed into initial state.
91 */
92 if ((inbuf == 0) || (*inbuf == 0)) {
93 cset = CS_0;
94 stat = ST_INIT;
95 op = (unsigned char *)*outbuf;
96 oleft = *outbytesleft;
97 retval = 0;
98 goto ret2;
99 }
100
101 ip = *inbuf;
102 op = (unsigned char *)*outbuf;
103 ileft = *inbytesleft;
104 oleft = *outbytesleft;
105 /* Everything down to here was taken unchanged from @(#)ISO-2022-JP%SJIS.
106 =======================================================================
107
108 *
109 * Main loop; basically 1 loop per 1 input byte
110 */
111
112 while (ileft > 0)
113 {
114 GET(ic);
115 /*
116 If the char is one of the following [ / ] { | } then convert
117 it to its corresponding value. In all other cases if the char
118 is greater than octal \178 ( ie a high bit char) convert it
119 to an underscore (_), as it has no mapping to 7 bit ASCII.
120 Otrherwise the char is the same in both cose sets.
121 */
122 if ( ic == '@')
123 ic = '\247';
124 else if ( ic == '[')
125 ic = '\241';
126 else if ( ic == '\\')
127 ic = '\321';
128 else if ( ic == ']')
129 ic = '\277';
130 else if ( ic == '{')
131 ic = '\260';
132 else if ( ic == '|')
133 ic = '\361';
134 else if ( ic == '}')
135 ic = '\347';
136 else if (ic > '\177')
137 ic = '_';
138
139
140
141 /* switch ( ic )
142 {
143 case '@' :
144 ic = '\247';
145 break;
146 case '[' :
147 ic = '\241';
148 break;
149 case '\\' :
150 ic = '\321';
151 break;
152 case ']' :
153 ic = '\277';
154 break;
155 case '{' :
156 ic = '\260';
157 break;
158 case '|' :
159 ic = '\361';
160 break;
161 case '}' :
162 ic = '\347';
163 break;
164 default :
165 if (ic > '\177')
166 ic = '_';
167 break;
168 } */
169
170 PUT(ic);
171 /*
172 Put the converted character into the output buffer, and decrement
173 the count of chars left in both the in and out buffers.
174 If we have no space left in the out buffer, but we have no reached
175 the end of the input buffer. We return what we have, and set the
176 errno (Error) to E2BIG.
177 */
178 if ((oleft < 1) && (ileft > 0))
179 {
180 errno = E2BIG;
181 retval = ERR_RETURN;
182 goto ret;
183 }
184
185
186 }
187 /*
188 We only get here if the end of the in buffer has been reached, we therefore return the
189 value 0 to denote that we have sucesfully converted the inbuffer.
190 */
191 retval = ileft;
192
193 /* Taken unchanged from @(#)ISO-2022-JP%SJIS. */
194
195 ret:
196 st->_st_cset = cset;
197 st->_st_stat = stat;
198 *inbuf = ip;
199 *inbytesleft = ileft;
200 ret2:
201 *outbuf = (char *)op;
202 *outbytesleft = oleft;
203
204 return (retval);
205 }
206