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. The file
27 * mbfilter.c is included in this package .
28 *
29 */
30
31 #include "mbfilter.h"
32 #include "mbfilter_ascii.h"
33
34 static int mbfl_filt_ident_ascii(int c, mbfl_identify_filter *filter);
35
36 static const char *mbfl_encoding_ascii_aliases[] = {"ANSI_X3.4-1968", "iso-ir-6", "ANSI_X3.4-1986", "ISO_646.irv:1991", "US-ASCII", "ISO646-US", "us", "IBM367", "IBM-367", "cp367", "csASCII", NULL};
37
38 const mbfl_encoding mbfl_encoding_ascii = {
39 mbfl_no_encoding_ascii,
40 "ASCII",
41 "US-ASCII", /* preferred MIME name */
42 (const char *(*)[])&mbfl_encoding_ascii_aliases,
43 NULL,
44 MBFL_ENCTYPE_SBCS,
45 &vtbl_ascii_wchar,
46 &vtbl_wchar_ascii
47 };
48
49 const struct mbfl_identify_vtbl vtbl_identify_ascii = {
50 mbfl_no_encoding_ascii,
51 mbfl_filt_ident_common_ctor,
52 mbfl_filt_ident_ascii
53 };
54
55 const struct mbfl_convert_vtbl vtbl_ascii_wchar = {
56 mbfl_no_encoding_ascii,
57 mbfl_no_encoding_wchar,
58 mbfl_filt_conv_common_ctor,
59 NULL,
60 mbfl_filt_conv_ascii_wchar,
61 mbfl_filt_conv_common_flush,
62 NULL,
63 };
64
65 const struct mbfl_convert_vtbl vtbl_wchar_ascii = {
66 mbfl_no_encoding_wchar,
67 mbfl_no_encoding_ascii,
68 mbfl_filt_conv_common_ctor,
69 NULL,
70 mbfl_filt_conv_wchar_ascii,
71 mbfl_filt_conv_common_flush,
72 NULL,
73 };
74
75 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
76
77 /*
78 * ASCII => wchar
79 */
mbfl_filt_conv_ascii_wchar(int c,mbfl_convert_filter * filter)80 int mbfl_filt_conv_ascii_wchar(int c, mbfl_convert_filter *filter)
81 {
82 return (*filter->output_function)(c, filter->data);
83 }
84
85
86 /*
87 * wchar => ASCII
88 */
mbfl_filt_conv_wchar_ascii(int c,mbfl_convert_filter * filter)89 int mbfl_filt_conv_wchar_ascii(int c, mbfl_convert_filter *filter)
90 {
91 if (c >= 0 && c < 0x80) {
92 CK((*filter->output_function)(c, filter->data));
93 } else {
94 CK(mbfl_filt_conv_illegal_output(c, filter));
95 }
96
97 return c;
98 }
99
mbfl_filt_ident_ascii(int c,mbfl_identify_filter * filter)100 static int mbfl_filt_ident_ascii(int c, mbfl_identify_filter *filter)
101 {
102 if (c >= 0x20 && c < 0x80) {
103 ;
104 } else if (c == 0x0d || c == 0x0a || c == 0x09 || c == 0) { /* CR or LF or HTAB or null */
105 ;
106 } else {
107 filter->flag = 1;
108 }
109
110 return c;
111 }
112
