Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_cp1251.c, revision 1.1.1.1
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 part: Den V. Tsopa <tdv@edisoft.ru>
22: *
23: */
24: /*
25: * The source code included in this files was separated from mbfilter_ru.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_cp1251.h"
36: #include "unicode_table_cp1251.h"
37:
38: static int mbfl_filt_ident_cp1251(int c, mbfl_identify_filter *filter);
39:
40: static const char *mbfl_encoding_cp1251_aliases[] = {"CP1251", "CP-1251", "WINDOWS-1251", NULL};
41:
42: const mbfl_encoding mbfl_encoding_cp1251 = {
43: mbfl_no_encoding_cp1251,
44: "Windows-1251",
45: "Windows-1251",
46: (const char *(*)[])&mbfl_encoding_cp1251_aliases,
47: NULL,
48: MBFL_ENCTYPE_SBCS
49: };
50:
51: const struct mbfl_identify_vtbl vtbl_identify_cp1251 = {
52: mbfl_no_encoding_cp1251,
53: mbfl_filt_ident_common_ctor,
54: mbfl_filt_ident_common_dtor,
55: mbfl_filt_ident_cp1251
56: };
57:
58: const struct mbfl_convert_vtbl vtbl_wchar_cp1251 = {
59: mbfl_no_encoding_wchar,
60: mbfl_no_encoding_cp1251,
61: mbfl_filt_conv_common_ctor,
62: mbfl_filt_conv_common_dtor,
63: mbfl_filt_conv_wchar_cp1251,
64: mbfl_filt_conv_common_flush
65: };
66:
67: const struct mbfl_convert_vtbl vtbl_cp1251_wchar = {
68: mbfl_no_encoding_cp1251,
69: mbfl_no_encoding_wchar,
70: mbfl_filt_conv_common_ctor,
71: mbfl_filt_conv_common_dtor,
72: mbfl_filt_conv_cp1251_wchar,
73: mbfl_filt_conv_common_flush
74: };
75:
76: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
77:
78: /*
79: * cp1251 => wchar
80: */
81: int
82: mbfl_filt_conv_cp1251_wchar(int c, mbfl_convert_filter *filter)
83: {
84: int s;
85:
86: if (c >= 0 && c < cp1251_ucs_table_min) {
87: s = c;
88: } else if (c >= cp1251_ucs_table_min && c < 0x100) {
89: s = cp1251_ucs_table[c - cp1251_ucs_table_min];
90: if (s <= 0) {
91: s = c;
92: s &= MBFL_WCSPLANE_MASK;
93: s |= MBFL_WCSPLANE_CP1251;
94: }
95: } else {
96: s = c;
97: s &= MBFL_WCSGROUP_MASK;
98: s |= MBFL_WCSGROUP_THROUGH;
99: }
100:
101: CK((*filter->output_function)(s, filter->data));
102:
103: return c;
104: }
105:
106: /*
107: * wchar => cp1251
108: */
109: int
110: mbfl_filt_conv_wchar_cp1251(int c, mbfl_convert_filter *filter)
111: {
112: int s, n;
113:
114: if (c < 0x80) {
115: s = c;
116: } else {
117: s = -1;
118: n = cp1251_ucs_table_len-1;
119: while (n >= 0) {
120: if (c == cp1251_ucs_table[n]) {
121: s = cp1251_ucs_table_min + n;
122: break;
123: }
124: n--;
125: }
126: if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_CP1251) {
127: s = c & MBFL_WCSPLANE_MASK;
128: }
129: }
130:
131: if (s >= 0) {
132: CK((*filter->output_function)(s, filter->data));
133: } else {
134: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
135: CK(mbfl_filt_conv_illegal_output(c, filter));
136: }
137: }
138:
139: return c;
140: }
141:
142: /* all of this is so ugly now! */
143: static int mbfl_filt_ident_cp1251(int c, mbfl_identify_filter *filter)
144: {
145: if (c >= 0x80 && c < 0xff)
146: filter->flag = 0;
147: else
148: filter->flag = 1; /* not it */
149: return c;
150: }
151:
152:
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