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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.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_ucs2.h"
36:
37: static const char *mbfl_encoding_ucs2_aliases[] = {"ISO-10646-UCS-2", "UCS2" , "UNICODE", NULL};
38:
39: const mbfl_encoding mbfl_encoding_ucs2 = {
40: mbfl_no_encoding_ucs2,
41: "UCS-2",
42: "UCS-2",
43: (const char *(*)[])&mbfl_encoding_ucs2_aliases,
44: NULL,
45: MBFL_ENCTYPE_WCS2BE
46: };
47:
48: const mbfl_encoding mbfl_encoding_ucs2be = {
49: mbfl_no_encoding_ucs2be,
50: "UCS-2BE",
51: "UCS-2BE",
52: NULL,
53: NULL,
54: MBFL_ENCTYPE_WCS2BE
55: };
56:
57: const mbfl_encoding mbfl_encoding_ucs2le = {
58: mbfl_no_encoding_ucs2le,
59: "UCS-2LE",
60: "UCS-2LE",
61: NULL,
62: NULL,
63: MBFL_ENCTYPE_WCS2LE
64: };
65:
66: const struct mbfl_convert_vtbl vtbl_ucs2_wchar = {
67: mbfl_no_encoding_ucs2,
68: mbfl_no_encoding_wchar,
69: mbfl_filt_conv_common_ctor,
70: mbfl_filt_conv_common_dtor,
71: mbfl_filt_conv_ucs2_wchar,
72: mbfl_filt_conv_common_flush
73: };
74:
75: const struct mbfl_convert_vtbl vtbl_wchar_ucs2 = {
76: mbfl_no_encoding_wchar,
77: mbfl_no_encoding_ucs2,
78: mbfl_filt_conv_common_ctor,
79: mbfl_filt_conv_common_dtor,
80: mbfl_filt_conv_wchar_ucs2be,
81: mbfl_filt_conv_common_flush
82: };
83:
84: const struct mbfl_convert_vtbl vtbl_ucs2be_wchar = {
85: mbfl_no_encoding_ucs2be,
86: mbfl_no_encoding_wchar,
87: mbfl_filt_conv_common_ctor,
88: mbfl_filt_conv_common_dtor,
89: mbfl_filt_conv_ucs2be_wchar,
90: mbfl_filt_conv_common_flush
91: };
92:
93: const struct mbfl_convert_vtbl vtbl_wchar_ucs2be = {
94: mbfl_no_encoding_wchar,
95: mbfl_no_encoding_ucs2be,
96: mbfl_filt_conv_common_ctor,
97: mbfl_filt_conv_common_dtor,
98: mbfl_filt_conv_wchar_ucs2be,
99: mbfl_filt_conv_common_flush
100: };
101:
102: const struct mbfl_convert_vtbl vtbl_ucs2le_wchar = {
103: mbfl_no_encoding_ucs2le,
104: mbfl_no_encoding_wchar,
105: mbfl_filt_conv_common_ctor,
106: mbfl_filt_conv_common_dtor,
107: mbfl_filt_conv_ucs2le_wchar,
108: mbfl_filt_conv_common_flush
109: };
110:
111: const struct mbfl_convert_vtbl vtbl_wchar_ucs2le = {
112: mbfl_no_encoding_wchar,
113: mbfl_no_encoding_ucs2le,
114: mbfl_filt_conv_common_ctor,
115: mbfl_filt_conv_common_dtor,
116: mbfl_filt_conv_wchar_ucs2le,
117: mbfl_filt_conv_common_flush
118: };
119:
120: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
121:
122: /*
123: * UCS-2 => wchar
124: */
125: int mbfl_filt_conv_ucs2_wchar(int c, mbfl_convert_filter *filter)
126: {
127: int n, endian;
128:
129: endian = filter->status & 0xff00;
130: switch (filter->status & 0xff) {
131: case 0:
132: if (endian) {
133: n = c & 0xff;
134: } else {
135: n = (c & 0xff) << 8;
136: }
137: filter->cache = n;
138: filter->status++;
139: break;
140: default:
141: if (endian) {
142: n = (c & 0xff) << 8;
143: } else {
144: n = c & 0xff;
145: }
146: n |= filter->cache;
147: if (n == 0xfffe) {
148: if (endian) {
149: filter->status = 0; /* big-endian */
150: } else {
151: filter->status = 0x100; /* little-endian */
152: }
153: CK((*filter->output_function)(0xfeff, filter->data));
154: } else {
155: filter->status &= ~0xff;
156: CK((*filter->output_function)(n, filter->data));
157: }
158: break;
159: }
160:
161: return c;
162: }
163:
164: /*
165: * UCS-2BE => wchar
166: */
167: int mbfl_filt_conv_ucs2be_wchar(int c, mbfl_convert_filter *filter)
168: {
169: int n;
170:
171: if (filter->status == 0) {
172: filter->status = 1;
173: n = (c & 0xff) << 8;
174: filter->cache = n;
175: } else {
176: filter->status = 0;
177: n = (c & 0xff) | filter->cache;
178: CK((*filter->output_function)(n, filter->data));
179: }
180: return c;
181: }
182:
183: /*
184: * wchar => UCS-2BE
185: */
186: int mbfl_filt_conv_wchar_ucs2be(int c, mbfl_convert_filter *filter)
187: {
188: if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
189: CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
190: CK((*filter->output_function)(c & 0xff, filter->data));
191: } else {
192: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
193: CK(mbfl_filt_conv_illegal_output(c, filter));
194: }
195: }
196:
197: return c;
198: }
199:
200: /*
201: * UCS-2LE => wchar
202: */
203: int mbfl_filt_conv_ucs2le_wchar(int c, mbfl_convert_filter *filter)
204: {
205: int n;
206:
207: if (filter->status == 0) {
208: filter->status = 1;
209: n = c & 0xff;
210: filter->cache = n;
211: } else {
212: filter->status = 0;
213: n = ((c & 0xff) << 8) | filter->cache;
214: CK((*filter->output_function)(n, filter->data));
215: }
216: return c;
217: }
218:
219:
220: /*
221: * wchar => UCS-2LE
222: */
223: int mbfl_filt_conv_wchar_ucs2le(int c, mbfl_convert_filter *filter)
224: {
225: if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
226: CK((*filter->output_function)(c & 0xff, filter->data));
227: CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
228: } else {
229: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
230: CK(mbfl_filt_conv_illegal_output(c, filter));
231: }
232: }
233:
234: return c;
235: }
236:
237:
238: