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