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 <_ansi.h>
31 #include <sys/types.h>
32 #include "../lib/local.h"
33 #include "../lib/ucsconv.h"
34
35 /*
36 * For optimization purposes us_ascii is implemented as separate CES converter.
37 * Another possible way is to add us_ascii CCS and use table-based CES converter.
38 */
39
40 #if defined (ICONV_FROM_UCS_CES_US_ASCII)
41 static size_t
us_ascii_convert_from_ucs(void * data,ucs4_t in,unsigned char ** outbuf,size_t * outbytesleft)42 us_ascii_convert_from_ucs (void *data,
43 ucs4_t in,
44 unsigned char **outbuf,
45 size_t *outbytesleft)
46 {
47 (void) data;
48 if (in > 0x7F)
49 return (size_t)ICONV_CES_INVALID_CHARACTER;
50
51 *((char *)(*outbuf)) = (char)in;
52
53 *outbuf += 1;
54 *outbytesleft -= 1;
55
56 return 1;
57 }
58 #endif /* ICONV_FROM_UCS_CES_US_ASCII */
59
60 #if defined (ICONV_TO_UCS_CES_US_ASCII)
61 static ucs4_t
us_ascii_convert_to_ucs(void * data,const unsigned char ** inbuf,size_t * inbytesleft)62 us_ascii_convert_to_ucs (void *data,
63 const unsigned char **inbuf,
64 size_t *inbytesleft)
65 {
66 (void) data;
67 ucs4_t res;
68
69 if (*inbytesleft < 1)
70 return (ucs4_t)ICONV_CES_BAD_SEQUENCE;
71
72 res = (ucs4_t)**inbuf;
73
74 if (res > 0x7F)
75 return (ucs4_t)ICONV_CES_INVALID_CHARACTER;
76
77 *inbytesleft -= 1;
78 *inbuf += 1;
79
80 return res;
81 }
82 #endif /* ICONV_TO_UCS_CES_US_ASCII */
83
84 static int
us_ascii_get_mb_cur_max(void * data)85 us_ascii_get_mb_cur_max (void *data)
86 {
87 (void) data;
88 return 2;
89 }
90
91 #if defined (ICONV_TO_UCS_CES_US_ASCII)
92 const iconv_to_ucs_ces_handlers_t
93 _iconv_to_ucs_ces_handlers_us_ascii =
94 {
95 NULL,
96 NULL,
97 us_ascii_get_mb_cur_max,
98 NULL,
99 NULL,
100 NULL,
101 us_ascii_convert_to_ucs
102 };
103 #endif
104
105 #if defined (ICONV_FROM_UCS_CES_US_ASCII)
106 const iconv_from_ucs_ces_handlers_t
107 _iconv_from_ucs_ces_handlers_us_ascii =
108 {
109 NULL,
110 NULL,
111 us_ascii_get_mb_cur_max,
112 NULL,
113 NULL,
114 NULL,
115 us_ascii_convert_from_ucs
116 };
117 #endif
118
119 #endif /* ICONV_TO_UCS_CES_US_ASCII || ICONV_FROM_UCS_CES_US_ASCII */
120
121
