kernel/libiconv: Sync with FreeBSD.
[dragonfly.git] / sys / libiconv / iconv_xlat16.c
blob59ec415b3ae291016eea521482baa264fe832592
1 /*-
2 * Copyright (c) 2003, 2005 Ryuichiro Imura
3 * All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
26 * $FreeBSD: head/sys/libkern/iconv_xlat16.c 194638 2009-06-22 17:09:46Z delphij $
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>
35 #include "iconv_converter_if.h"
38 * "XLAT16" converter
41 #ifdef MODULE_DEPEND
42 MODULE_DEPEND(iconv_xlat16, libiconv, 2, 2, 2);
43 #endif
45 #define C2I1(c) ((c) & 0x8000 ? ((c) & 0xff) | 0x100 : (c) & 0xff)
46 #define C2I2(c) ((c) & 0x8000 ? ((c) >> 8) & 0x7f : ((c) >> 8) & 0xff)
49 * XLAT16 converter instance
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;
59 static int
60 iconv_xlat16_open(struct iconv_converter_class *dcp,
61 struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
63 struct iconv_xlat16 *dp;
64 uint32_t *headp, **idxp;
65 int i;
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;
77 idxp++;
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;
89 dp->d_csp = csp;
90 csp->cp_refcount++;
91 *dpp = (void*)dp;
92 return (0);
95 static int
96 iconv_xlat16_close(void *data)
98 struct iconv_xlat16 *dp = data;
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);
109 static int
110 iconv_xlat16_conv(void *d2p, const char **inbuf,
111 size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
112 int convchar, int casetype)
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;
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;
130 while(ir > 0 && or > 0) {
132 inlen = 0;
133 code = 0;
135 c1 = ir > 1 ? *(src+1) & 0xff : 0;
136 c2 = *src & 0xff;
137 ctmp = 0;
139 c1 = c2 & 0x80 ? c1 | 0x100 : c1;
140 c2 = c2 & 0x80 ? c2 & 0x7f : c2;
142 if (ir > 1 && dp->d_table[c1] && dp->d_table[c1][c2]) {
144 * inbuf char is a double byte char
146 inlen = 2;
148 /* toupper,tolower */
149 if (casetype == KICONV_FROM_LOWER && dp->f_ctp)
150 ctmp = towlower(((u_char)*src << 8) | (u_char)*(src + 1),
151 dp->f_ctp);
152 else if (casetype == KICONV_FROM_UPPER && dp->f_ctp)
153 ctmp = towupper(((u_char)*src << 8) | (u_char)*(src + 1),
154 dp->f_ctp);
155 if (ctmp) {
156 c1 = C2I1(ctmp);
157 c2 = C2I2(ctmp);
161 if (inlen == 0) {
162 c1 &= 0xff00;
163 if (!dp->d_table[c1]) {
164 ret = -1;
165 break;
168 * inbuf char is a single byte char
170 inlen = 1;
172 if (casetype & (KICONV_FROM_LOWER|KICONV_FROM_UPPER))
173 code = dp->d_table[c1][c2];
175 if (casetype == KICONV_FROM_LOWER) {
176 if (dp->f_ctp)
177 ctmp = towlower((u_char)*src, dp->f_ctp);
178 else if (code & XLAT16_HAS_FROM_LOWER_CASE)
179 ctmp = (u_char)(code >> 16);
180 } else if (casetype == KICONV_FROM_UPPER) {
181 if (dp->f_ctp)
182 ctmp = towupper((u_char)*src, dp->f_ctp);
183 else if (code & XLAT16_HAS_FROM_UPPER_CASE)
184 ctmp = (u_char)(code >> 16);
186 if (ctmp) {
187 c1 = C2I1(ctmp << 8);
188 c2 = C2I2(ctmp << 8);
192 code = dp->d_table[c1][c2];
193 if (!code) {
194 ret = -1;
195 break;
198 nullin = (code & XLAT16_ACCEPT_NULL_IN) ? 1 : 0;
199 if (inlen == 1 && nullin) {
201 * XLAT16_ACCEPT_NULL_IN requires inbuf has 2byte
203 ret = -1;
204 break;
208 * now start translation
210 u = (u_char)(code >> 8);
211 l = (u_char)code;
213 #ifdef XLAT16_ACCEPT_3BYTE_CHR
214 if (code & XLAT16_IS_3BYTE_CHR) {
215 if (or < 3) {
216 ret = -1;
217 break;
219 *dst++ = u;
220 *dst++ = l;
221 *dst++ = (u_char)(code >> 16);
222 or -= 3;
223 } else
224 #endif
225 if (u || code & XLAT16_ACCEPT_NULL_OUT) {
226 if (or < 2) {
227 ret = -1;
228 break;
231 /* toupper,tolower */
232 if (casetype == KICONV_LOWER && dp->t_ctp) {
233 code = towlower((uint16_t)code, dp->t_ctp);
234 u = (u_char)(code >> 8);
235 l = (u_char)code;
237 if (casetype == KICONV_UPPER && dp->t_ctp) {
238 code = towupper((uint16_t)code, dp->t_ctp);
239 u = (u_char)(code >> 8);
240 l = (u_char)code;
243 *dst++ = u;
244 *dst++ = l;
245 or -= 2;
246 } else {
247 /* toupper,tolower */
248 if (casetype == KICONV_LOWER) {
249 if (dp->t_ctp)
250 l = (u_char)towlower(l, dp->t_ctp);
251 else if (code & XLAT16_HAS_LOWER_CASE)
252 l = (u_char)(code >> 16);
254 if (casetype == KICONV_UPPER) {
255 if (dp->t_ctp)
256 l = (u_char)towupper(l, dp->t_ctp);
257 else if (code & XLAT16_HAS_UPPER_CASE)
258 l = (u_char)(code >> 16);
261 *dst++ = l;
262 or--;
265 if (inlen == 2) {
267 * there is a case that inbuf char is a single
268 * byte char while inlen == 2
270 if ((u_char)*(src+1) == 0 && !nullin ) {
271 src++;
272 ir--;
273 } else {
274 src += 2;
275 ir -= 2;
277 } else {
278 src++;
279 ir--;
282 if (convchar == 1)
283 break;
286 *inbuf += in - ir;
287 *outbuf += on - or;
288 *inbytesleft -= in - ir;
289 *outbytesleft -= on - or;
290 return (ret);
293 static const char *
294 iconv_xlat16_name(struct iconv_converter_class *dcp)
296 return ("xlat16");
299 static int
300 iconv_xlat16_tolower(void *d2p, int c)
302 struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
303 int c1, c2, out;
305 if (c < 0x100) {
306 c1 = C2I1(c << 8);
307 c2 = C2I2(c << 8);
308 } else if (c < 0x10000) {
309 c1 = C2I1(c);
310 c2 = C2I2(c);
311 } else
312 return (c);
314 if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_LOWER_CASE) {
315 /*return (int)(dp->d_table[c1][c2] & 0xffff);*/
316 out = dp->d_table[c1][c2] & 0xffff;
317 if ((out & 0xff) == 0)
318 out = (out >> 8) & 0xff;
319 return (out);
320 } else
321 return (c);
324 static int
325 iconv_xlat16_toupper(void *d2p, int c)
327 struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
328 int c1, c2, out;
330 if (c < 0x100) {
331 c1 = C2I1(c << 8);
332 c2 = C2I2(c << 8);
333 } else if (c < 0x10000) {
334 c1 = C2I1(c);
335 c2 = C2I2(c);
336 } else
337 return (c);
339 if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_UPPER_CASE) {
340 out = dp->d_table[c1][c2] & 0xffff;
341 if ((out & 0xff) == 0)
342 out = (out >> 8) & 0xff;
343 return (out);
344 } else
345 return (c);
348 static kobj_method_t iconv_xlat16_methods[] = {
349 KOBJMETHOD(iconv_converter_open, iconv_xlat16_open),
350 KOBJMETHOD(iconv_converter_close, iconv_xlat16_close),
351 KOBJMETHOD(iconv_converter_conv, iconv_xlat16_conv),
352 #if 0
353 KOBJMETHOD(iconv_converter_init, iconv_xlat16_init),
354 KOBJMETHOD(iconv_converter_done, iconv_xlat16_done),
355 #endif
356 KOBJMETHOD(iconv_converter_name, iconv_xlat16_name),
357 KOBJMETHOD(iconv_converter_tolower, iconv_xlat16_tolower),
358 KOBJMETHOD(iconv_converter_toupper, iconv_xlat16_toupper),
359 KOBJMETHOD_END
362 KICONV_CONVERTER(xlat16, sizeof(struct iconv_xlat16));