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1.1 misho 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_ja.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_sjis.h"
36:
37: #include "unicode_table_cp932_ext.h"
38: #include "unicode_table_jis.h"
39:
40: static int mbfl_filt_ident_sjis(int c, mbfl_identify_filter *filter);
41:
42: static const unsigned char mblen_table_sjis[] = { /* 0x80-0x9f,0xE0-0xFF */
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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
54: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
55: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
56: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
57: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
58: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
59: };
60:
61: static const char *mbfl_encoding_sjis_aliases[] = {"x-sjis", "SHIFT-JIS", NULL};
62:
63: const mbfl_encoding mbfl_encoding_sjis = {
64: mbfl_no_encoding_sjis,
65: "SJIS",
66: "Shift_JIS",
67: (const char *(*)[])&mbfl_encoding_sjis_aliases,
68: mblen_table_sjis,
69: MBFL_ENCTYPE_MBCS
70: };
71:
72: const struct mbfl_identify_vtbl vtbl_identify_sjis = {
73: mbfl_no_encoding_sjis,
74: mbfl_filt_ident_common_ctor,
75: mbfl_filt_ident_common_dtor,
76: mbfl_filt_ident_sjis
77: };
78:
79: const struct mbfl_convert_vtbl vtbl_sjis_wchar = {
80: mbfl_no_encoding_sjis,
81: mbfl_no_encoding_wchar,
82: mbfl_filt_conv_common_ctor,
83: mbfl_filt_conv_common_dtor,
84: mbfl_filt_conv_sjis_wchar,
85: mbfl_filt_conv_common_flush
86: };
87:
88: const struct mbfl_convert_vtbl vtbl_wchar_sjis = {
89: mbfl_no_encoding_wchar,
90: mbfl_no_encoding_sjis,
91: mbfl_filt_conv_common_ctor,
92: mbfl_filt_conv_common_dtor,
93: mbfl_filt_conv_wchar_sjis,
94: mbfl_filt_conv_common_flush
95: };
96:
97: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
98:
99: #define SJIS_ENCODE(c1,c2,s1,s2) \
100: do { \
101: s1 = c1; \
102: s1--; \
103: s1 >>= 1; \
104: if ((c1) < 0x5f) { \
105: s1 += 0x71; \
106: } else { \
107: s1 += 0xb1; \
108: } \
109: s2 = c2; \
110: if ((c1) & 1) { \
111: if ((c2) < 0x60) { \
112: s2--; \
113: } \
114: s2 += 0x20; \
115: } else { \
116: s2 += 0x7e; \
117: } \
118: } while (0)
119:
120: #define SJIS_DECODE(c1,c2,s1,s2) \
121: do { \
122: s1 = c1; \
123: if (s1 < 0xa0) { \
124: s1 -= 0x81; \
125: } else { \
126: s1 -= 0xc1; \
127: } \
128: s1 <<= 1; \
129: s1 += 0x21; \
130: s2 = c2; \
131: if (s2 < 0x9f) { \
132: if (s2 < 0x7f) { \
133: s2++; \
134: } \
135: s2 -= 0x20; \
136: } else { \
137: s1++; \
138: s2 -= 0x7e; \
139: } \
140: } while (0)
141:
142:
143: /*
144: * SJIS => wchar
145: */
146: int
147: mbfl_filt_conv_sjis_wchar(int c, mbfl_convert_filter *filter)
148: {
149: int c1, s1, s2, w;
150:
151: switch (filter->status) {
152: case 0:
153: if (c >= 0 && c < 0x80) { /* latin */
154: CK((*filter->output_function)(c, filter->data));
155: } else if (c > 0xa0 && c < 0xe0) { /* kana */
156: CK((*filter->output_function)(0xfec0 + c, filter->data));
157: } else if (c > 0x80 && c < 0xfd && c != 0xa0) { /* kanji first char */
158: filter->status = 1;
159: filter->cache = c;
160: } else {
161: w = c & MBFL_WCSGROUP_MASK;
162: w |= MBFL_WCSGROUP_THROUGH;
163: CK((*filter->output_function)(w, filter->data));
164: }
165: break;
166:
167: case 1: /* kanji second char */
168: filter->status = 0;
169: c1 = filter->cache;
170: if (c >= 0x40 && c <= 0xfc && c != 0x7f) {
171: SJIS_DECODE(c1, c, s1, s2);
172: w = (s1 - 0x21)*94 + s2 - 0x21;
173: if (w >= 0 && w < jisx0208_ucs_table_size) {
174: w = jisx0208_ucs_table[w];
175: } else {
176: w = 0;
177: }
178: if (w <= 0) {
179: if (s1 < 0x7f && s2 < 0x7f) {
180: w = (s1 << 8) | s2;
181: w &= MBFL_WCSPLANE_MASK;
182: w |= MBFL_WCSPLANE_JIS0208;
183: } else {
184: w = (c1 << 8) | c;
185: w &= MBFL_WCSGROUP_MASK;
186: w |= MBFL_WCSGROUP_THROUGH;
187: }
188: }
189: CK((*filter->output_function)(w, filter->data));
190: } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
191: CK((*filter->output_function)(c, filter->data));
192: } else {
193: w = (c1 << 8) | c;
194: w &= MBFL_WCSGROUP_MASK;
195: w |= MBFL_WCSGROUP_THROUGH;
196: CK((*filter->output_function)(w, filter->data));
197: }
198: break;
199:
200: default:
201: filter->status = 0;
202: break;
203: }
204:
205: return c;
206: }
207:
208: /*
209: * wchar => SJIS
210: */
211: int
212: mbfl_filt_conv_wchar_sjis(int c, mbfl_convert_filter *filter)
213: {
214: int c1, c2, s1, s2;
215:
216: s1 = 0;
217: if (c >= ucs_a1_jis_table_min && c < ucs_a1_jis_table_max) {
218: s1 = ucs_a1_jis_table[c - ucs_a1_jis_table_min];
219: } else if (c >= ucs_a2_jis_table_min && c < ucs_a2_jis_table_max) {
220: s1 = ucs_a2_jis_table[c - ucs_a2_jis_table_min];
221: } else if (c >= ucs_i_jis_table_min && c < ucs_i_jis_table_max) {
222: s1 = ucs_i_jis_table[c - ucs_i_jis_table_min];
223: } else if (c >= ucs_r_jis_table_min && c < ucs_r_jis_table_max) {
224: s1 = ucs_r_jis_table[c - ucs_r_jis_table_min];
225: }
226: if (s1 <= 0) {
227: c1 = c & ~MBFL_WCSPLANE_MASK;
228: if (c1 == MBFL_WCSPLANE_JIS0208) {
229: s1 = c & MBFL_WCSPLANE_MASK;
230: } else if (c == 0xa5) { /* YEN SIGN */
231: s1 = 0x216f; /* FULLWIDTH YEN SIGN */
232: } else if (c == 0x203e) { /* OVER LINE */
233: s1 = 0x2131; /* FULLWIDTH MACRON */
234: } else if (c == 0xff3c) { /* FULLWIDTH REVERSE SOLIDUS */
235: s1 = 0x2140;
236: } else if (c == 0xff5e) { /* FULLWIDTH TILDE */
237: s1 = 0x2141;
238: } else if (c == 0x2225) { /* PARALLEL TO */
239: s1 = 0x2142;
240: } else if (c == 0xff0d) { /* FULLWIDTH HYPHEN-MINUS */
241: s1 = 0x215d;
242: } else if (c == 0xffe0) { /* FULLWIDTH CENT SIGN */
243: s1 = 0x2171;
244: } else if (c == 0xffe1) { /* FULLWIDTH POUND SIGN */
245: s1 = 0x2172;
246: } else if (c == 0xffe2) { /* FULLWIDTH NOT SIGN */
247: s1 = 0x224c;
248: }
249: if (c == 0) {
250: s1 = 0;
251: } else if (s1 <= 0) {
252: s1 = -1;
253: }
254: } else if (s1 >= 0x8080) {
255: s1 = -1;
256: }
257: if (s1 >= 0) {
258: if (s1 < 0x100) { /* latin or kana */
259: CK((*filter->output_function)(s1, filter->data));
260: } else { /* kanji */
261: c1 = (s1 >> 8) & 0xff;
262: c2 = s1 & 0xff;
263: SJIS_ENCODE(c1, c2, s1, s2);
264: CK((*filter->output_function)(s1, filter->data));
265: CK((*filter->output_function)(s2, filter->data));
266: }
267: } else {
268: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
269: CK(mbfl_filt_conv_illegal_output(c, filter));
270: }
271: }
272:
273: return c;
274: }
275:
276: static int mbfl_filt_ident_sjis(int c, mbfl_identify_filter *filter)
277: {
278: if (filter->status) { /* kanji second char */
279: if (c < 0x40 || c > 0xfc || c == 0x7f) { /* bad */
280: filter->flag = 1;
281: }
282: filter->status = 0;
283: } else if (c >= 0 && c < 0x80) { /* latin ok */
284: ;
285: } else if (c > 0xa0 && c < 0xe0) { /* kana ok */
286: ;
287: } else if (c > 0x80 && c < 0xf0 && c != 0xa0) { /* kanji first char */
288: filter->status = 1;
289: } else { /* bad */
290: filter->flag = 1;
291: }
292:
293: return c;
294: }
295: