1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003, 2005 Ryuichiro Imura
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/iconv.h>
34
35 #include "iconv_converter_if.h"
36
37 /*
38 * "XLAT16" converter
39 */
40
41 #ifdef MODULE_DEPEND
42 MODULE_DEPEND(iconv_xlat16, libiconv, 2, 2, 2);
43 #endif
44
45 #define C2I1(c) ((c) & 0x8000 ? ((c) & 0xff) | 0x100 : (c) & 0xff)
46 #define C2I2(c) ((c) & 0x8000 ? ((c) >> 8) & 0x7f : ((c) >> 8) & 0xff)
47
48 /*
49 * XLAT16 converter instance
50 */
51 struct iconv_xlat16 {
52 KOBJ_FIELDS;
53 uint32_t * d_table[0x200];
54 void * f_ctp;
55 void * t_ctp;
56 struct iconv_cspair * d_csp;
57 };
58
59 static int
iconv_xlat16_open(struct iconv_converter_class * dcp,struct iconv_cspair * csp,struct iconv_cspair * cspf,void ** dpp)60 iconv_xlat16_open(struct iconv_converter_class *dcp,
61 struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
62 {
63 struct iconv_xlat16 *dp;
64 uint32_t *headp, **idxp;
65 int i;
66
67 dp = (struct iconv_xlat16 *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
68 headp = (uint32_t *)((caddr_t)csp->cp_data + sizeof(dp->d_table));
69 idxp = (uint32_t **)csp->cp_data;
70 for (i = 0 ; i < 0x200 ; i++) {
71 if (*idxp) {
72 dp->d_table[i] = headp;
73 headp += 0x80;
74 } else {
75 dp->d_table[i] = NULL;
76 }
77 idxp++;
78 }
79
80 if (strcmp(csp->cp_to, KICONV_WCTYPE_NAME) != 0) {
81 if (iconv_open(KICONV_WCTYPE_NAME, csp->cp_from, &dp->f_ctp) != 0)
82 dp->f_ctp = NULL;
83 if (iconv_open(KICONV_WCTYPE_NAME, csp->cp_to, &dp->t_ctp) != 0)
84 dp->t_ctp = NULL;
85 } else {
86 dp->f_ctp = dp->t_ctp = dp;
87 }
88
89 dp->d_csp = csp;
90 csp->cp_refcount++;
91 *dpp = (void*)dp;
92 return (0);
93 }
94
95 static int
iconv_xlat16_close(void * data)96 iconv_xlat16_close(void *data)
97 {
98 struct iconv_xlat16 *dp = data;
99
100 if (dp->f_ctp && dp->f_ctp != data)
101 iconv_close(dp->f_ctp);
102 if (dp->t_ctp && dp->t_ctp != data)
103 iconv_close(dp->t_ctp);
104 dp->d_csp->cp_refcount--;
105 kobj_delete((struct kobj*)data, M_ICONV);
106 return (0);
107 }
108
109 static int
iconv_xlat16_conv(void * d2p,const char ** inbuf,size_t * inbytesleft,char ** outbuf,size_t * outbytesleft,int convchar,int casetype)110 iconv_xlat16_conv(void *d2p, const char **inbuf,
111 size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
112 int convchar, int casetype)
113 {
114 struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
115 const char *src;
116 char *dst;
117 int nullin, ret = 0;
118 size_t in, on, ir, or, inlen;
119 uint32_t code;
120 u_char u, l;
121 uint16_t c1, c2, ctmp;
122
123 if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
124 return (0);
125 ir = in = *inbytesleft;
126 or = on = *outbytesleft;
127 src = *inbuf;
128 dst = *outbuf;
129
130 while(ir > 0 && or > 0) {
131 inlen = 0;
132 code = 0;
133
134 c1 = ir > 1 ? *(src+1) & 0xff : 0;
135 c2 = *src & 0xff;
136 ctmp = 0;
137
138 c1 = c2 & 0x80 ? c1 | 0x100 : c1;
139 c2 = c2 & 0x80 ? c2 & 0x7f : c2;
140
141 if (ir > 1 && dp->d_table[c1] && dp->d_table[c1][c2]) {
142 /*
143 * inbuf char is a double byte char
144 */
145 inlen = 2;
146
147 /* toupper,tolower */
148 if (casetype == KICONV_FROM_LOWER && dp->f_ctp)
149 ctmp = towlower(((u_char)*src << 8) | (u_char)*(src + 1),
150 dp->f_ctp);
151 else if (casetype == KICONV_FROM_UPPER && dp->f_ctp)
152 ctmp = towupper(((u_char)*src << 8) | (u_char)*(src + 1),
153 dp->f_ctp);
154 if (ctmp) {
155 c1 = C2I1(ctmp);
156 c2 = C2I2(ctmp);
157 }
158 }
159
160 if (inlen == 0) {
161 c1 &= 0xff00;
162 if (!dp->d_table[c1]) {
163 ret = -1;
164 break;
165 }
166 /*
167 * inbuf char is a single byte char
168 */
169 inlen = 1;
170
171 if (casetype & (KICONV_FROM_LOWER|KICONV_FROM_UPPER))
172 code = dp->d_table[c1][c2];
173
174 if (casetype == KICONV_FROM_LOWER) {
175 if (dp->f_ctp)
176 ctmp = towlower((u_char)*src, dp->f_ctp);
177 else if (code & XLAT16_HAS_FROM_LOWER_CASE)
178 ctmp = (u_char)(code >> 16);
179 } else if (casetype == KICONV_FROM_UPPER) {
180 if (dp->f_ctp)
181 ctmp = towupper((u_char)*src, dp->f_ctp);
182 else if (code & XLAT16_HAS_FROM_UPPER_CASE)
183 ctmp = (u_char)(code >> 16);
184 }
185 if (ctmp) {
186 c1 = C2I1(ctmp << 8);
187 c2 = C2I2(ctmp << 8);
188 }
189 }
190
191 code = dp->d_table[c1][c2];
192 if (!code) {
193 ret = -1;
194 break;
195 }
196
197 nullin = (code & XLAT16_ACCEPT_NULL_IN) ? 1 : 0;
198 if (inlen == 1 && nullin) {
199 /*
200 * XLAT16_ACCEPT_NULL_IN requires inbuf has 2byte
201 */
202 ret = -1;
203 break;
204 }
205
206 /*
207 * now start translation
208 */
209 u = (u_char)(code >> 8);
210 l = (u_char)code;
211
212 #ifdef XLAT16_ACCEPT_3BYTE_CHR
213 if (code & XLAT16_IS_3BYTE_CHR) {
214 if (or < 3) {
215 ret = -1;
216 break;
217 }
218 *dst++ = u;
219 *dst++ = l;
220 *dst++ = (u_char)(code >> 16);
221 or -= 3;
222 } else
223 #endif
224 if (u || code & XLAT16_ACCEPT_NULL_OUT) {
225 if (or < 2) {
226 ret = -1;
227 break;
228 }
229
230 /* toupper,tolower */
231 if (casetype == KICONV_LOWER && dp->t_ctp) {
232 code = towlower((uint16_t)code, dp->t_ctp);
233 u = (u_char)(code >> 8);
234 l = (u_char)code;
235 }
236 if (casetype == KICONV_UPPER && dp->t_ctp) {
237 code = towupper((uint16_t)code, dp->t_ctp);
238 u = (u_char)(code >> 8);
239 l = (u_char)code;
240 }
241
242 *dst++ = u;
243 *dst++ = l;
244 or -= 2;
245 } else {
246 /* toupper,tolower */
247 if (casetype == KICONV_LOWER) {
248 if (dp->t_ctp)
249 l = (u_char)towlower(l, dp->t_ctp);
250 else if (code & XLAT16_HAS_LOWER_CASE)
251 l = (u_char)(code >> 16);
252 }
253 if (casetype == KICONV_UPPER) {
254 if (dp->t_ctp)
255 l = (u_char)towupper(l, dp->t_ctp);
256 else if (code & XLAT16_HAS_UPPER_CASE)
257 l = (u_char)(code >> 16);
258 }
259
260 *dst++ = l;
261 or--;
262 }
263
264 if (inlen == 2) {
265 /*
266 * there is a case that inbuf char is a single
267 * byte char while inlen == 2
268 */
269 if ((u_char)*(src+1) == '\0' && !nullin ) {
270 src++;
271 ir--;
272 } else {
273 src += 2;
274 ir -= 2;
275 }
276 } else {
277 src++;
278 ir--;
279 }
280
281 if (convchar == 1)
282 break;
283 }
284
285 *inbuf += in - ir;
286 *outbuf += on - or;
287 *inbytesleft -= in - ir;
288 *outbytesleft -= on - or;
289 return (ret);
290 }
291
292 static const char *
iconv_xlat16_name(struct iconv_converter_class * dcp)293 iconv_xlat16_name(struct iconv_converter_class *dcp)
294 {
295 return ("xlat16");
296 }
297
298 static int
iconv_xlat16_tolower(void * d2p,int c)299 iconv_xlat16_tolower(void *d2p, int c)
300 {
301 struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
302 int c1, c2, out;
303
304 if (c < 0x100) {
305 c1 = C2I1(c << 8);
306 c2 = C2I2(c << 8);
307 } else if (c < 0x10000) {
308 c1 = C2I1(c);
309 c2 = C2I2(c);
310 } else
311 return (c);
312
313 if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_LOWER_CASE) {
314 /*return (int)(dp->d_table[c1][c2] & 0xffff);*/
315 out = dp->d_table[c1][c2] & 0xffff;
316 if ((out & 0xff) == 0)
317 out = (out >> 8) & 0xff;
318 return (out);
319 } else
320 return (c);
321 }
322
323 static int
iconv_xlat16_toupper(void * d2p,int c)324 iconv_xlat16_toupper(void *d2p, int c)
325 {
326 struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
327 int c1, c2, out;
328
329 if (c < 0x100) {
330 c1 = C2I1(c << 8);
331 c2 = C2I2(c << 8);
332 } else if (c < 0x10000) {
333 c1 = C2I1(c);
334 c2 = C2I2(c);
335 } else
336 return (c);
337
338 if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_UPPER_CASE) {
339 out = dp->d_table[c1][c2] & 0xffff;
340 if ((out & 0xff) == 0)
341 out = (out >> 8) & 0xff;
342 return (out);
343 } else
344 return (c);
345 }
346
347 static kobj_method_t iconv_xlat16_methods[] = {
348 KOBJMETHOD(iconv_converter_open, iconv_xlat16_open),
349 KOBJMETHOD(iconv_converter_close, iconv_xlat16_close),
350 KOBJMETHOD(iconv_converter_conv, iconv_xlat16_conv),
351 #if 0
352 KOBJMETHOD(iconv_converter_init, iconv_xlat16_init),
353 KOBJMETHOD(iconv_converter_done, iconv_xlat16_done),
354 #endif
355 KOBJMETHOD(iconv_converter_name, iconv_xlat16_name),
356 KOBJMETHOD(iconv_converter_tolower, iconv_xlat16_tolower),
357 KOBJMETHOD(iconv_converter_toupper, iconv_xlat16_toupper),
358 {0, 0}
359 };
360
361 KICONV_CONVERTER(xlat16, sizeof(struct iconv_xlat16));
362