1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2008, by Sun Microsystems, Inc.
* All rights reserved.
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/types.h>
#define __NEED_UNI_2_TCVN__
#include <unicode_tcvn.h> /* Unicode to TCVN mapping table */
#include "common_defs.h"
#define NON_ID_CHAR '?' /* non-identified character */
typedef struct _icv_state {
int _errno; /* internal errno */
} _iconv_st;
/*
* Open; called from iconv_open()
*/
void *
_icv_open()
{
_iconv_st *st;
if ((st = (_iconv_st *)malloc(sizeof(_iconv_st))) == NULL) {
errno = ENOMEM;
return ((void *) -1);
}
st->_errno = 0;
return ((void *) st);
}
/*
* Close; called from iconv_close()
*/
void
_icv_close(_iconv_st *st)
{
if (!st)
errno = EBADF;
else
free(st);
}
/*
* Actual conversion; called from iconv()
*/
size_t
_icv_iconv(_iconv_st *st, char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
{
int utf8_len = 1;
int no_id_char_num = 0;
unsigned char *op = (unsigned char*)*inbuf;
#ifdef DEBUG
fprintf(stderr, "========== iconv(): UCS-2 --> TCVN5712 ==========\n");
#endif
if (st == NULL) {
errno = EBADF;
return ((size_t) -1);
}
if (inbuf == NULL || *inbuf == NULL) { /* Reset request. */
st->_errno = 0;
return ((size_t) 0);
}
st->_errno = 0; /* Rreset internal errno */
errno = 0; /* Rreset external errno */
/* Convert UTF-8 encoding to TCVN5712 */
while (*inbytesleft > 0 && *outbytesleft > 0) {
unsigned long uni = 0;
unsigned char ch = 0;
unsigned long temp1 = 0,
temp2 = 0,
temp3 = 0;
if(0x00 == (*op & 0x80)) {
/* 1 byte UTF-8 Charater.*/
uni = (unsigned short)*op;
utf8_len = 1;
goto conving;
}
if (*inbytesleft < 2)
goto errexit;
if ( 0xc0 == (*op & 0xe0) &&
0x80 == (*(op + 1) & 0xc0) ) {
/* 2 bytes UTF-8 Charater.*/
temp1 = (unsigned short)(*op & 0x1f);
temp1 <<= 6;
temp1 |= (unsigned short)(*(op + 1) & 0x3f);
uni = temp1;
utf8_len = 2;
goto conving;
}
if (*inbytesleft < 3)
goto errexit;
if ( 0xe0 == (*op & 0xf0) &&
0x80 == (*(op + 1) & 0xc0) &&
0x80 == (*(op + 2) & 0xc0) ) {
/* 3bytes UTF-8 Charater.*/
temp1 = (unsigned short)(*op &0x0f);
temp1 <<= 12;
temp2 = (unsigned short)(*(op+1) & 0x3F);
temp2 <<= 6;
temp1 = temp1 | temp2 | (unsigned short)(*(op+2) & 0x3F);
uni = temp1;
utf8_len = 3;
goto conving;
}
if (*inbytesleft < 4)
goto errexit;
if ( 0xf0 == (*op & 0xf8) &&
0x80 == (*(op + 1) & 0xc0) &&
0x80 == (*(op + 2) & 0xc0) ) {
/* 4bytes UTF-8 Charater.*/
temp1 = *op &0x07;
temp1 <<= 18;
temp2 = (*(op+1) & 0x3F);
temp2 <<= 12;
temp3 = (*(op+1) & 0x3F);
temp3 <<= 6;
temp1 = temp1 | temp2 | temp3 |(unsigned long)(*(op+2) & 0x3F);
uni = temp1;
utf8_len = 4;
goto conving;
}
/* unrecognize byte. */
st->_errno = errno = EILSEQ;
errno = EILSEQ;
return ((size_t)-1);
conving:
if (uni_2_tcvn(uni, &ch) == 1) {
**outbuf = ch;
} else {
**outbuf = NON_ID_CHAR;
no_id_char_num += 1;
}
(*outbuf) += 1;
(*outbytesleft) -= 1;
op += utf8_len;
(*inbytesleft) -= utf8_len;
}
return ((size_t)no_id_char_num);
errexit:
st->_errno = errno = EINVAL;
errno = EINVAL;
return ((size_t)-1);
}
|
