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: Wez Furlong <wez@thebrainroom.com>
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_cp1252.h"
36 : #include "unicode_table_cp1252.h"
37 :
38 : static int mbfl_filt_ident_cp1252(int c, mbfl_identify_filter *filter);
39 :
40 : static const char *mbfl_encoding_cp1252_aliases[] = {"cp1252", NULL};
41 :
42 : const mbfl_encoding mbfl_encoding_cp1252 = {
43 : mbfl_no_encoding_cp1252,
44 : "Windows-1252",
45 : "Windows-1252",
46 : (const char *(*)[])&mbfl_encoding_cp1252_aliases,
47 : NULL,
48 : MBFL_ENCTYPE_SBCS
49 : };
50 :
51 : const struct mbfl_identify_vtbl vtbl_identify_cp1252 = {
52 : mbfl_no_encoding_cp1252,
53 : mbfl_filt_ident_common_ctor,
54 : mbfl_filt_ident_common_dtor,
55 : mbfl_filt_ident_cp1252
56 : };
57 :
58 : const struct mbfl_convert_vtbl vtbl_cp1252_wchar = {
59 : mbfl_no_encoding_cp1252,
60 : mbfl_no_encoding_wchar,
61 : mbfl_filt_conv_common_ctor,
62 : mbfl_filt_conv_common_dtor,
63 : mbfl_filt_conv_cp1252_wchar,
64 : mbfl_filt_conv_common_flush
65 : };
66 :
67 : const struct mbfl_convert_vtbl vtbl_wchar_cp1252 = {
68 : mbfl_no_encoding_wchar,
69 : mbfl_no_encoding_cp1252,
70 : mbfl_filt_conv_common_ctor,
71 : mbfl_filt_conv_common_dtor,
72 : mbfl_filt_conv_wchar_cp1252,
73 : mbfl_filt_conv_common_flush
74 : };
75 :
76 : #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
77 :
78 : /*
79 : * wchar => cp1252
80 : */
81 : int mbfl_filt_conv_wchar_cp1252(int c, mbfl_convert_filter *filter)
82 0 : {
83 0 : int s=-1, n;
84 :
85 0 : if (c >= 0x100) {
86 : /* look it up from the cp1252 table */
87 0 : s = -1;
88 0 : n = 31;
89 0 : while (n >= 0) {
90 0 : if (c == cp1252_ucs_table[n] && c != 0xfffe) {
91 0 : s = 0x80 + n;
92 0 : break;
93 : }
94 0 : n--;
95 : }
96 0 : if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_8859_1)
97 : {
98 0 : s = c & MBFL_WCSPLANE_MASK;
99 : }
100 : }
101 0 : else if (c >= 0 && c < 0x100) {
102 0 : s = c;
103 : }
104 0 : if (s >= 0) {
105 0 : CK((*filter->output_function)(s, filter->data));
106 : } else {
107 0 : if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
108 0 : CK(mbfl_filt_conv_illegal_output(c, filter));
109 : }
110 : }
111 0 : return c;
112 : }
113 :
114 : /*
115 : * cp1252 => wchar
116 : */
117 : int mbfl_filt_conv_cp1252_wchar(int c, mbfl_convert_filter *filter)
118 0 : {
119 : int s;
120 :
121 0 : if (c >= 0x80 && c < 0xa0) {
122 0 : s = cp1252_ucs_table[c - 0x80];
123 : } else {
124 0 : s = c;
125 : }
126 :
127 0 : CK((*filter->output_function)(s, filter->data));
128 :
129 0 : return c;
130 : }
131 :
132 : /* We only distinguish the MS extensions to ISO-8859-1.
133 : * Actually, this is pretty much a NO-OP, since the identification
134 : * system doesn't allow us to discriminate between a positive match,
135 : * a possible match and a definite non-match.
136 : * The problem here is that cp1252 looks like SJIS for certain chars.
137 : * */
138 : static int mbfl_filt_ident_cp1252(int c, mbfl_identify_filter *filter)
139 0 : {
140 0 : if (c >= 0x80 && c < 0xa0)
141 0 : filter->flag = 0;
142 : else
143 0 : filter->flag = 1; /* not it */
144 0 : return c;
145 : }
146 :
147 :
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