Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_cp1252.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: 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: {
83: int s=-1, n;
84:
85: if (c >= 0x100) {
86: /* look it up from the cp1252 table */
87: s = -1;
88: n = 31;
89: while (n >= 0) {
90: if (c == cp1252_ucs_table[n] && c != 0xfffe) {
91: s = 0x80 + n;
92: break;
93: }
94: n--;
95: }
96: if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_8859_1)
97: {
98: s = c & MBFL_WCSPLANE_MASK;
99: }
100: }
101: else if (c >= 0 && c < 0x100) {
102: s = c;
103: }
104: if (s >= 0) {
105: CK((*filter->output_function)(s, filter->data));
106: } else {
107: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
108: CK(mbfl_filt_conv_illegal_output(c, filter));
109: }
110: }
111: return c;
112: }
113:
114: /*
115: * cp1252 => wchar
116: */
117: int mbfl_filt_conv_cp1252_wchar(int c, mbfl_convert_filter *filter)
118: {
119: int s;
120:
121: if (c >= 0x80 && c < 0xa0) {
122: s = cp1252_ucs_table[c - 0x80];
123: } else {
124: s = c;
125: }
126:
127: CK((*filter->output_function)(s, filter->data));
128:
129: 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: {
140: if (c >= 0x80 && c < 0xa0)
141: filter->flag = 0;
142: else
143: filter->flag = 1; /* not it */
144: return c;
145: }
146:
147:
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