1 /*
2 * Copyright (c) 2003-2004, Artem B. Bityuckiy
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25 #include "cesbi.h"
26
27 #if defined (ICONV_TO_UCS_CES_US_ASCII) \
28 || defined (ICONV_FROM_UCS_CES_US_ASCII)
29
30 #include <sys/types.h>
31 #include "../lib/local.h"
32 #include "../lib/ucsconv.h"
33
34 /*
35 * For optimization purposes us_ascii is implemented as separate CES converter.
36 * Another possible way is to add us_ascii CCS and use table-based CES converter.
37 */
38
39 #if defined (ICONV_FROM_UCS_CES_US_ASCII)
40 static size_t
us_ascii_convert_from_ucs(void * data,ucs4_t in,unsigned char ** outbuf,size_t * outbytesleft)41 us_ascii_convert_from_ucs (void *data,
42 ucs4_t in,
43 unsigned char **outbuf,
44 size_t *outbytesleft)
45 {
46 (void) data;
47 if (in > 0x7F)
48 return (size_t)ICONV_CES_INVALID_CHARACTER;
49
50 *((char *)(*outbuf)) = (char)in;
51
52 *outbuf += 1;
53 *outbytesleft -= 1;
54
55 return 1;
56 }
57 #endif /* ICONV_FROM_UCS_CES_US_ASCII */
58
59 #if defined (ICONV_TO_UCS_CES_US_ASCII)
60 static ucs4_t
us_ascii_convert_to_ucs(void * data,const unsigned char ** inbuf,size_t * inbytesleft)61 us_ascii_convert_to_ucs (void *data,
62 const unsigned char **inbuf,
63 size_t *inbytesleft)
64 {
65 (void) data;
66 ucs4_t res;
67
68 if (*inbytesleft < 1)
69 return (ucs4_t)ICONV_CES_BAD_SEQUENCE;
70
71 res = (ucs4_t)**inbuf;
72
73 if (res > 0x7F)
74 return (ucs4_t)ICONV_CES_INVALID_CHARACTER;
75
76 *inbytesleft -= 1;
77 *inbuf += 1;
78
79 return res;
80 }
81 #endif /* ICONV_TO_UCS_CES_US_ASCII */
82
83 static int
us_ascii_get_mb_cur_max(void * data)84 us_ascii_get_mb_cur_max (void *data)
85 {
86 (void) data;
87 return 2;
88 }
89
90 #if defined (ICONV_TO_UCS_CES_US_ASCII)
91 const iconv_to_ucs_ces_handlers_t
92 _iconv_to_ucs_ces_handlers_us_ascii =
93 {
94 NULL,
95 NULL,
96 us_ascii_get_mb_cur_max,
97 NULL,
98 NULL,
99 NULL,
100 us_ascii_convert_to_ucs
101 };
102 #endif
103
104 #if defined (ICONV_FROM_UCS_CES_US_ASCII)
105 const iconv_from_ucs_ces_handlers_t
106 _iconv_from_ucs_ces_handlers_us_ascii =
107 {
108 NULL,
109 NULL,
110 us_ascii_get_mb_cur_max,
111 NULL,
112 NULL,
113 NULL,
114 us_ascii_convert_from_ucs
115 };
116 #endif
117
118 #endif /* ICONV_TO_UCS_CES_US_ASCII || ICONV_FROM_UCS_CES_US_ASCII */
119
120
