gdb - Local mods (compile)
[dragonfly.git] / sys / libiconv / iconv_xlat16.c
1 /*-
2  * Copyright (c) 2003, Ryuichiro Imura
3  * All rights reserved.
4  *
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.
13  *
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.
25  *
26  * $FreeBSD: src/sys/libkern/iconv_xlat16.c,v 1.3.20.1 2009/04/15 03:14:26 kensmith Exp $
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 /*
46  * XLAT16 converter instance
47  */
48 struct iconv_xlat16 {
49         KOBJ_FIELDS;
50         uint32_t *              d_table[0x200];
51         struct iconv_cspair *   d_csp;
52 };
53
54 static int
55 iconv_xlat16_open(struct iconv_converter_class *dcp,
56         struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
57 {
58         struct iconv_xlat16 *dp;
59         uint32_t *headp, **idxp;
60         int i;
61
62         dp = (struct iconv_xlat16 *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
63         headp = (uint32_t *)((caddr_t)csp->cp_data + sizeof(dp->d_table));
64         idxp = (uint32_t **)csp->cp_data;
65         for (i = 0 ; i < 0x200 ; i++) {
66                 if (*idxp) {
67                         dp->d_table[i] = headp;
68                         headp += 0x80;
69                 } else {
70                         dp->d_table[i] = NULL;
71                 }
72                 idxp++;
73         }
74         dp->d_csp = csp;
75         csp->cp_refcount++;
76         *dpp = (void*)dp;
77         return (0);
78 }
79
80 static int
81 iconv_xlat16_close(void *data)
82 {
83         struct iconv_xlat16 *dp = data;
84
85         dp->d_csp->cp_refcount--;
86         kobj_delete((struct kobj*)data, M_ICONV);
87         return (0);
88 }
89
90 static int
91 iconv_xlat16_conv(void *d2p, const char **inbuf,
92         size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
93         int convchar, int casetype)
94 {
95         struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
96         const char *src;
97         char *dst;
98         int nullin, ret = 0;
99         size_t in, on, ir, or, inlen;
100         uint32_t code;
101         u_char u, l;
102         uint16_t c1, c2;
103
104         if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
105                 return (0);
106         ir = in = *inbytesleft;
107         or = on = *outbytesleft;
108         src = *inbuf;
109         dst = *outbuf;
110
111         while(ir > 0 && or > 0) {
112
113                 inlen = 0;
114                 code = '\0';
115
116                 c1 = ir > 1 ? *(src+1) & 0xff : 0;
117                 c2 = *src & 0xff;
118
119                 c1 = c2 & 0x80 ? c1 | 0x100 : c1;
120                 c2 = c2 & 0x80 ? c2 & 0x7f : c2;
121
122                 if (ir > 1 && dp->d_table[c1]) {
123                         /*
124                          * inbuf char is a double byte char
125                          */
126                         code = dp->d_table[c1][c2];
127                         if (code)
128                                 inlen = 2;
129                 }
130
131                 if (inlen == 0) {
132                         c1 &= 0xff00;
133                         if (!dp->d_table[c1]) {
134                                 ret = -1;
135                                 break;
136                         }
137                         /*
138                          * inbuf char is a single byte char
139                          */
140                         inlen = 1;
141                         code = dp->d_table[c1][c2];
142                         if (!code) {
143                                 ret = -1;
144                                 break;
145                         }
146                 }
147
148                 nullin = (code & XLAT16_ACCEPT_NULL_IN) ? 1 : 0;
149                 if (inlen == 1 && nullin) {
150                         /*
151                          * XLAT16_ACCEPT_NULL_IN requires inbuf has 2byte
152                          */
153                         ret = -1;
154                         break;
155                 }
156
157                 /*
158                  * now start translation
159                  */
160                 if ((casetype == KICONV_FROM_LOWER && code & XLAT16_HAS_FROM_LOWER_CASE) ||
161                     (casetype == KICONV_FROM_UPPER && code & XLAT16_HAS_FROM_UPPER_CASE)) {
162                         c2 = (u_char)(code >> 16);
163                         c1 = c2 & 0x80 ? 0x100 : 0;
164                         c2 = c2 & 0x80 ? c2 & 0x7f : c2;
165                         code = dp->d_table[c1][c2];
166                 }
167
168                 u = (u_char)(code >> 8);
169                 l = (u_char)code;
170
171 #ifdef XLAT16_ACCEPT_3BYTE_CHR
172                 if (code & XLAT16_IS_3BYTE_CHR) {
173                         if (or < 3) {
174                                 ret = -1;
175                                 break;
176                         }
177                         *dst++ = u;
178                         *dst++ = l;
179                         *dst++ = (u_char)(code >> 16);
180                         or -= 3;
181                 } else
182 #endif
183                 if (u || code & XLAT16_ACCEPT_NULL_OUT) {
184                         if (or < 2) {
185                                 ret = -1;
186                                 break;
187                         }
188                         *dst++ = u;
189                         *dst++ = l;
190                         or -= 2;
191                 } else {
192                         if ((casetype == KICONV_LOWER && code & XLAT16_HAS_LOWER_CASE) ||
193                             (casetype == KICONV_UPPER && code & XLAT16_HAS_UPPER_CASE))
194                                 *dst++ = (u_char)(code >> 16);
195                         else
196                                 *dst++ = l;
197                         or--;
198                 }
199
200                 if (inlen == 2) {
201                         /*
202                          * there is a case that inbuf char is a single
203                          * byte char while inlen == 2
204                          */
205                         if ((u_char)*(src+1) == 0 && !nullin ) {
206                                 src++;
207                                 ir--;
208                         } else {
209                                 src += 2;
210                                 ir -= 2;
211                         }
212                 } else {
213                         src++;
214                         ir--;
215                 }
216
217                 if (convchar == 1)
218                         break;
219         }
220
221         *inbuf += in - ir;
222         *outbuf += on - or;
223         *inbytesleft -= in - ir;
224         *outbytesleft -= on - or;
225         return (ret);
226 }
227
228 static const char *
229 iconv_xlat16_name(struct iconv_converter_class *dcp)
230 {
231         return ("xlat16");
232 }
233
234 static kobj_method_t iconv_xlat16_methods[] = {
235         KOBJMETHOD(iconv_converter_open,        iconv_xlat16_open),
236         KOBJMETHOD(iconv_converter_close,       iconv_xlat16_close),
237         KOBJMETHOD(iconv_converter_conv,        iconv_xlat16_conv),
238 #if 0
239         KOBJMETHOD(iconv_converter_init,        iconv_xlat16_init),
240         KOBJMETHOD(iconv_converter_done,        iconv_xlat16_done),
241 #endif
242         KOBJMETHOD(iconv_converter_name,        iconv_xlat16_name),
243         KOBJMETHOD_END
244 };
245
246 KICONV_CONVERTER(xlat16, sizeof(struct iconv_xlat16));