1 : /*
2 : * "streamable kanji code filter and converter"
3 : * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
4 : *
5 : * LICENSE NOTICES
6 : *
7 : * This file is part of "streamable kanji code filter and converter",
8 : * which is distributed under the terms of GNU Lesser General Public
9 : * License (version 2) as published by the Free Software Foundation.
10 : *
11 : * This software is distributed in the hope that it will be useful,
12 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : * GNU Lesser General Public License for more details.
15 : *
16 : * You should have received a copy of the GNU Lesser General Public
17 : * License along with "streamable kanji code filter and converter";
18 : * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
19 : * Suite 330, Boston, MA 02111-1307 USA
20 : *
21 : * The author of this file:
22 : *
23 : */
24 : /*
25 : * the source code included in this files was separated from mbfilter_cn.c
26 : * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
27 : *
28 : */
29 :
30 : #ifdef HAVE_CONFIG_H
31 : #include "config.h"
32 : #endif
33 :
34 : #include "mbfilter.h"
35 : #include "mbfilter_cp936.h"
36 :
37 : #include "unicode_table_cp936.h"
38 :
39 : static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter);
40 :
41 : static const unsigned char mblen_table_cp936[] = { /* 0x81-0xFE */
42 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
43 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
44 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
45 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
46 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
47 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
48 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
49 : 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
50 : 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
51 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
52 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
53 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
54 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
55 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
56 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
57 : 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
58 : };
59 :
60 : static const char *mbfl_encoding_cp936_aliases[] = {"CP-936", "GBK", NULL};
61 :
62 : const mbfl_encoding mbfl_encoding_cp936 = {
63 : mbfl_no_encoding_cp936,
64 : "CP936",
65 : "CP936",
66 : (const char *(*)[])&mbfl_encoding_cp936_aliases,
67 : mblen_table_cp936,
68 : MBFL_ENCTYPE_MBCS
69 : };
70 :
71 : const struct mbfl_identify_vtbl vtbl_identify_cp936 = {
72 : mbfl_no_encoding_cp936,
73 : mbfl_filt_ident_common_ctor,
74 : mbfl_filt_ident_common_dtor,
75 : mbfl_filt_ident_cp936
76 : };
77 :
78 : const struct mbfl_convert_vtbl vtbl_cp936_wchar = {
79 : mbfl_no_encoding_cp936,
80 : mbfl_no_encoding_wchar,
81 : mbfl_filt_conv_common_ctor,
82 : mbfl_filt_conv_common_dtor,
83 : mbfl_filt_conv_cp936_wchar,
84 : mbfl_filt_conv_common_flush
85 : };
86 :
87 : const struct mbfl_convert_vtbl vtbl_wchar_cp936 = {
88 : mbfl_no_encoding_wchar,
89 : mbfl_no_encoding_cp936,
90 : mbfl_filt_conv_common_ctor,
91 : mbfl_filt_conv_common_dtor,
92 : mbfl_filt_conv_wchar_cp936,
93 : mbfl_filt_conv_common_flush
94 : };
95 :
96 :
97 : #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
98 :
99 : /*
100 : * CP936 => wchar
101 : */
102 : int
103 : mbfl_filt_conv_cp936_wchar(int c, mbfl_convert_filter *filter)
104 1 : {
105 : int c1, w;
106 :
107 1 : switch (filter->status) {
108 : case 0:
109 1 : if (c >= 0 && c < 0x80) { /* latin */
110 0 : CK((*filter->output_function)(c, filter->data));
111 1 : } else if (c == 0x80) { /* euro sign */
112 1 : CK((*filter->output_function)(0x20ac, filter->data));
113 0 : } else if (c > 0x80 && c < 0xff) { /* dbcs lead byte */
114 0 : filter->status = 1;
115 0 : filter->cache = c;
116 : } else {
117 0 : w = c & MBFL_WCSGROUP_MASK;
118 0 : w |= MBFL_WCSGROUP_THROUGH;
119 0 : CK((*filter->output_function)(w, filter->data));
120 : }
121 1 : break;
122 :
123 : case 1: /* dbcs second byte */
124 0 : filter->status = 0;
125 0 : c1 = filter->cache;
126 0 : if ( c1 < 0xff && c1 > 0x80 && c > 0x39 && c < 0xff && c != 0x7f) {
127 0 : w = (c1 - 0x81)*192 + (c - 0x40);
128 0 : if (w >= 0 && w < cp936_ucs_table_size) {
129 0 : w = cp936_ucs_table[w];
130 : } else {
131 0 : w = 0;
132 : }
133 0 : if (w <= 0) {
134 0 : w = (c1 << 8) | c;
135 0 : w &= MBFL_WCSPLANE_MASK;
136 0 : w |= MBFL_WCSPLANE_WINCP936;
137 : }
138 0 : CK((*filter->output_function)(w, filter->data));
139 0 : } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
140 0 : CK((*filter->output_function)(c, filter->data));
141 : } else {
142 0 : w = (c1 << 8) | c;
143 0 : w &= MBFL_WCSGROUP_MASK;
144 0 : w |= MBFL_WCSGROUP_THROUGH;
145 0 : CK((*filter->output_function)(w, filter->data));
146 : }
147 0 : break;
148 :
149 : default:
150 0 : filter->status = 0;
151 : break;
152 : }
153 :
154 1 : return c;
155 : }
156 :
157 : /*
158 : * wchar => CP936
159 : */
160 : int
161 : mbfl_filt_conv_wchar_cp936(int c, mbfl_convert_filter *filter)
162 1 : {
163 : int c1, s;
164 :
165 1 : s = 0;
166 1 : if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
167 0 : s = ucs_a1_cp936_table[c - ucs_a1_cp936_table_min];
168 2 : } else if (c >= ucs_a2_cp936_table_min && c < ucs_a2_cp936_table_max) {
169 1 : s = ucs_a2_cp936_table[c - ucs_a2_cp936_table_min];
170 0 : } else if (c >= ucs_a3_cp936_table_min && c < ucs_a3_cp936_table_max) {
171 0 : s = ucs_a3_cp936_table[c - ucs_a3_cp936_table_min];
172 0 : } else if (c >= ucs_i_cp936_table_min && c < ucs_i_cp936_table_max) {
173 0 : s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
174 0 : } else if (c >= ucs_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
175 0 : s = ucs_ci_cp936_table[c - ucs_ci_cp936_table_min];
176 0 : } else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
177 0 : s = ucs_cf_cp936_table[c - ucs_cf_cp936_table_min];
178 0 : } else if (c >= ucs_sfv_cp936_table_min && c < ucs_sfv_cp936_table_max) {
179 0 : s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min];
180 0 : } else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
181 0 : s = ucs_hff_cp936_table[c - ucs_hff_cp936_table_min];
182 : }
183 1 : if (s <= 0) {
184 0 : c1 = c & ~MBFL_WCSPLANE_MASK;
185 0 : if (c1 == MBFL_WCSPLANE_WINCP936) {
186 0 : s = c & MBFL_WCSPLANE_MASK;
187 : }
188 0 : if (c == 0) {
189 0 : s = 0;
190 0 : } else if (s <= 0) {
191 0 : s = -1;
192 : }
193 : }
194 1 : if (s >= 0) {
195 1 : if (s <= 0x80) { /* latin */
196 1 : CK((*filter->output_function)(s, filter->data));
197 : } else {
198 0 : CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
199 0 : CK((*filter->output_function)(s & 0xff, filter->data));
200 : }
201 : } else {
202 0 : if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
203 0 : CK(mbfl_filt_conv_illegal_output(c, filter));
204 : }
205 : }
206 :
207 1 : return c;
208 : }
209 :
210 : static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter)
211 0 : {
212 0 : if (filter->status) { /* kanji second char */
213 0 : if (c < 0x40 || c > 0xfe || c == 0x7f) { /* bad */
214 0 : filter->flag = 1;
215 : }
216 0 : filter->status = 0;
217 0 : } else if (c >= 0 && c < 0x80) { /* latin ok */
218 : ;
219 0 : } else if (c > 0x80 && c < 0xff) { /* DBCS lead byte */
220 0 : filter->status = 1;
221 : } else { /* bad */
222 0 : filter->flag = 1;
223 : }
224 :
225 0 : return c;
226 : }
227 :
228 :
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