Annotation of embedaddon/php/ext/mbstring/libmbfl/filters/mbfilter_cp1254.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: Haluk AKIN <halukakin@gmail.com>
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_cp1254.h"
36: #include "unicode_table_cp1254.h"
37:
38: static int mbfl_filt_ident_cp1254(int c, mbfl_identify_filter *filter);
39:
40: static const char *mbfl_encoding_cp1254_aliases[] = {"CP1254", "CP-1254", "WINDOWS-1254", NULL};
41:
42: const mbfl_encoding mbfl_encoding_cp1254 = {
43: mbfl_no_encoding_cp1254,
44: "Windows-1254",
45: "Windows-1254",
46: (const char *(*)[])&mbfl_encoding_cp1254_aliases,
47: NULL,
48: MBFL_ENCTYPE_SBCS
49: };
50:
51: const struct mbfl_identify_vtbl vtbl_identify_cp1254 = {
52: mbfl_no_encoding_cp1254,
53: mbfl_filt_ident_common_ctor,
54: mbfl_filt_ident_common_dtor,
55: mbfl_filt_ident_cp1254
56: };
57:
58: const struct mbfl_convert_vtbl vtbl_cp1254_wchar = {
59: mbfl_no_encoding_cp1254,
60: mbfl_no_encoding_wchar,
61: mbfl_filt_conv_common_ctor,
62: mbfl_filt_conv_common_dtor,
63: mbfl_filt_conv_cp1254_wchar,
64: mbfl_filt_conv_common_flush
65: };
66:
67: const struct mbfl_convert_vtbl vtbl_wchar_cp1254 = {
68: mbfl_no_encoding_wchar,
69: mbfl_no_encoding_cp1254,
70: mbfl_filt_conv_common_ctor,
71: mbfl_filt_conv_common_dtor,
72: mbfl_filt_conv_wchar_cp1254,
73: mbfl_filt_conv_common_flush
74: };
75:
76: #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
77:
78: /*
79: * wchar => cp1254
80: */
81: int
82: mbfl_filt_conv_wchar_cp1254(int c, mbfl_convert_filter *filter)
83: {
84: int s, n;
85:
86: if (c < 0x80) {
87: s = c;
88: } else {
89: s = -1;
90: n = cp1254_ucs_table_len-1;
91: while (n >= 0) {
92: if (c == cp1254_ucs_table[n] && c != 0xfffe) {
93: s = cp1254_ucs_table_min + n;
94: break;
95: }
96: n--;
97: }
98: if (s <= 0 && (c & ~MBFL_WCSPLANE_MASK) == MBFL_WCSPLANE_CP1254) {
99: s = c & MBFL_WCSPLANE_MASK;
100: }
101: }
102:
103: if (s >= 0) {
104: CK((*filter->output_function)(s, filter->data));
105: } else {
106: if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
107: CK(mbfl_filt_conv_illegal_output(c, filter));
108: }
109: }
110:
111: return c;
112: }
113:
114: /*
115: * cp1254 => wchar
116: */
117: int
118: mbfl_filt_conv_cp1254_wchar(int c, mbfl_convert_filter *filter)
119: {
120: int s;
121:
122: if (c >= 0 && c < cp1254_ucs_table_min) {
123: s = c;
124: } else if (c >= cp1254_ucs_table_min && c < 0x100) {
125: s = cp1254_ucs_table[c - cp1254_ucs_table_min];
126: if (s <= 0) {
127: s = c;
128: s &= MBFL_WCSPLANE_MASK;
129: s |= MBFL_WCSPLANE_CP1254;
130: }
131: } else {
132: s = c;
133: s &= MBFL_WCSGROUP_MASK;
134: s |= MBFL_WCSGROUP_THROUGH;
135: }
136:
137: CK((*filter->output_function)(s, filter->data));
138:
139: return c;
140: }
141:
142: /* We only distinguish the MS extensions to ISO-8859-1.
143: * Actually, this is pretty much a NO-OP, since the identification
144: * system doesn't allow us to discriminate between a positive match,
145: * a possible match and a definite non-match.
146: * The problem here is that cp1254 looks like SJIS for certain chars.
147: * */
148: static int mbfl_filt_ident_cp1254(int c, mbfl_identify_filter *filter)
149: {
150: if (c >= 0x80 && c < 0xff)
151: filter->flag = 0;
152: else
153: filter->flag = 1; /* not it */
154: return c;
155: }
156:
157:
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