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 = '_';
124 else if ( ic == '\134' )
125 ic = '_';
126 else if ( ic == ']' )
127 ic = '_';
128 else if ( ic == '{' )
129 ic = '_';
130 else if ( ic == '|' )
131 ic = '_';
132 else if ( ic == '}' )
133 ic = '_';
134 else if ( ic == '~' )
135 ic = '_';
136 else if ( ic == '\100' )
137 ic = '_';
138 else if ( ic == 167 )
139 ic = '\100';
140 else if ( ic == 223 )
141 ic = '~';
142 else if ( ic == 220 )
143 ic = ']';
144 else if ( ic == 196 )
145 ic = '[';
146 else if ( ic == 214 )
147 ic = '\134';
148 else if ( ic == 252 )
149 ic = '}';
150 else if ( ic == 228 )
151 ic = '{';
152 else if ( ic == 246 )
153 ic = '|';
154 else if (ic > '\177')
155 ic = '_';
156
157
158
159
160
161
162
163 /* switch ( ic )
164 {
165 case '[' :
166 ic = '_';
167 break;
168 case '\134' :
169 ic = '_';
170 break;
171 case ']' :
172 ic = '_';
173 break;
174 case '{' :
175 ic = '_';
176 break;
177 case '|' :
178 ic = '_';
179 break;
180 case '}' :
181 ic = '_';
182 break;
183 case '~' :
184 ic = '_';
185 break;
186 case '\100' :
187 ic = '_';
188 break;
189 case 167 :
190 ic = '\100';
191 break;
192 case 223 :
193 ic = '~';
194 break;
195 case 220 :
196 ic = ']';
197 break;
198 case 196 :
199 ic = '[';
200 break;
201 case 214 :
202 ic = '\134';
203 break;
204 case 252 :
205 ic = '}';
206 break;
207 case 228 :
208 ic = '{';
209 break;
210 case 246 :
211 ic = '|';
212 break;
213 default :
214 if (ic > '\177')
215 ic = '_';
216 break;
217 } */
218
219 PUT(ic);
220 /*
221 Put the converted character into the output buffer, and decrement
222 the count of chars left in both the in and out buffers.
223 If we have no space left in the out buffer, but we have no reached
224 the end of the input buffer. We return what we have, and set the
225 errno (Error) to E2BIG.
226 */
227 if ((oleft < 1) && (ileft > 0))
228 {
229 errno = E2BIG;
230 retval = ERR_RETURN;
231 goto ret;
232 }
233
234
235 }
236 /*
237 We only get here if the end of the in buffer has been reached, we therefore return the
238 value 0 to denote that we have sucesfully converted the inbuffer.
239 */
240 retval = ileft;
241
242 /* Taken unchanged from @(#)ISO-2022-JP%SJIS. */
243
244 ret:
245 st->_st_cset = cset;
246 st->_st_stat = stat;
247 *inbuf = ip;
248 *inbytesleft = ileft;
249 ret2:
250 *outbuf = (char *)op;
251 *outbytesleft = oleft;
252
253 return (retval);
254 }
255