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_7bit.h"
33
34 static size_t mb_7bit_to_wchar(unsigned char **in, size_t *in_len, uint32_t *buf, size_t bufsize, unsigned int *state);
35 static void mb_wchar_to_7bit(uint32_t *in, size_t len, mb_convert_buf *buf, bool end);
36
37 const struct mbfl_convert_vtbl vtbl_7bit_wchar = {
38 mbfl_no_encoding_7bit,
39 mbfl_no_encoding_wchar,
40 mbfl_filt_conv_common_ctor,
41 NULL,
42 mbfl_filt_conv_7bit_any,
43 mbfl_filt_conv_common_flush,
44 NULL,
45 };
46
47 const struct mbfl_convert_vtbl vtbl_wchar_7bit = {
48 mbfl_no_encoding_wchar,
49 mbfl_no_encoding_7bit,
50 mbfl_filt_conv_common_ctor,
51 NULL,
52 mbfl_filt_conv_any_7bit,
53 mbfl_filt_conv_common_flush,
54 NULL,
55 };
56
57 const mbfl_encoding mbfl_encoding_7bit = {
58 mbfl_no_encoding_7bit,
59 "7bit",
60 "7bit",
61 NULL,
62 NULL,
63 MBFL_ENCTYPE_SBCS,
64 &vtbl_7bit_wchar,
65 &vtbl_wchar_7bit,
66 mb_7bit_to_wchar,
67 mb_wchar_to_7bit,
68 NULL,
69 NULL,
70 };
71
72 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
73
mbfl_filt_conv_7bit_any(int c,mbfl_convert_filter * filter)74 int mbfl_filt_conv_7bit_any(int c, mbfl_convert_filter *filter)
75 {
76 return (*filter->output_function)(c < 0x80 ? c : MBFL_BAD_INPUT, filter->data);
77 }
78
mbfl_filt_conv_any_7bit(int c,mbfl_convert_filter * filter)79 int mbfl_filt_conv_any_7bit(int c, mbfl_convert_filter *filter)
80 {
81 if (c >= 0 && c < 0x80) {
82 CK((*filter->output_function)(c, filter->data));
83 } else {
84 CK(mbfl_filt_conv_illegal_output(c, filter));
85 }
86 return 0;
87 }
88
mb_7bit_to_wchar(unsigned char ** in,size_t * in_len,uint32_t * buf,size_t bufsize,unsigned int * state)89 static size_t mb_7bit_to_wchar(unsigned char **in, size_t *in_len, uint32_t *buf, size_t bufsize, unsigned int *state)
90 {
91 unsigned char *p = *in, *e = p + *in_len;
92 uint32_t *out = buf, *limit = buf + bufsize;
93
94 while (p < e && out < limit) {
95 unsigned char c = *p++;
96 *out++ = (c < 0x80) ? c : MBFL_BAD_INPUT;
97 }
98
99 *in_len = e - p;
100 *in = p;
101 return out - buf;
102 }
103
mb_wchar_to_7bit(uint32_t * in,size_t len,mb_convert_buf * buf,bool end)104 static void mb_wchar_to_7bit(uint32_t *in, size_t len, mb_convert_buf *buf, bool end)
105 {
106 unsigned char *out, *limit;
107 MB_CONVERT_BUF_LOAD(buf, out, limit);
108 MB_CONVERT_BUF_ENSURE(buf, out, limit, len);
109
110 while (len--) {
111 uint32_t w = *in++;
112 if (w <= 0x7F) {
113 out = mb_convert_buf_add(out, w);
114 } else {
115 MB_CONVERT_ERROR(buf, out, limit, w, mb_wchar_to_7bit);
116 MB_CONVERT_BUF_ENSURE(buf, out, limit, len);
117 }
118 }
119
120 MB_CONVERT_BUF_STORE(buf, out, limit);
121 }
122
