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
|
/* Mapping tables from GBK to GB2312 and vice versa.
Copyright (C) 1999-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <dlfcn.h>
#include <gconv.h>
#include <stdint.h>
/* Definitions used in the body of the `gconv' function. */
#define CHARSET_NAME "GBK//"
#define FROM_LOOP from_gbk_to_gb
#define TO_LOOP from_gb_to_gbk
#define DEFINE_INIT 1
#define DEFINE_FINI 1
#define MIN_NEEDED_FROM 1
#define MAX_NEEDED_FROM 2
#define MIN_NEEDED_TO 1
#define MAX_NEEDED_TO 2
#define ONE_DIRECTION 0
/* First define the conversion function from GBK to GB2312. */
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT MAX_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t ch = *inptr; \
\
if (ch <= 0x7f) \
*outptr++ = *inptr++; \
else \
{ \
/* It's a two-byte sequence. We have to mask out all the sequences \
which are not in GB2312. Besides all of them in the range \
0x8140 to 0xA0FE this also includes in the remaining range the \
sequences which the second byte being in the range from 0x40 to \
0xA0 and the following exceptions: \
\
0xA2A1 to 0xA2A9, \
0xA2AA, \
0xA6E0 to 0xA6EB, \
0xA6EE to 0xA6F2, \
0xA6F4, 0xA6F5, \
0xA8BB to 0xA8C0 \
\
All these characters are not defined in GB2312. Besides this \
there is an incomatibility in the mapping. The Unicode tables \
say that 0xA1A4 maps in GB2312 to U30FB while in GBK it maps to \
U00B7. Similarly, 0xA1AA maps in GB2312 to U2015 while in GBK \
it maps to U2014. Since we are free to do whatever we want if \
a mapping is not available we will not flag this as an error \
but instead map the two positions. But this means that the \
mapping \
\
UCS4 -> GB2312 -> GBK -> UCS4 \
\
might not produce identical text. */ \
if (__glibc_unlikely (inptr + 1 >= inend)) \
{ \
/* The second character is not available. Store \
the intermediate result. */ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
if (__glibc_unlikely (outend - outptr < 2)) \
{ \
/* We ran out of space. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
ch = (ch << 8) | inptr[1]; \
\
/* Map 0xA844 (U2015 in GBK) to 0xA1AA (U2015 in GB2312). */ \
if (__glibc_unlikely (ch == 0xa844)) \
ch = 0xa1aa; \
\
/* Now determine whether the character is valid. */ \
if (__builtin_expect (ch < 0xa1a1, 0) \
|| __builtin_expect (ch > 0xf7fe, 0) \
|| __builtin_expect (inptr[1] < 0xa1, 0) \
/* Now test the exceptions. */ \
|| (__builtin_expect (ch >= 0xa2a1, 0) \
&& __builtin_expect (ch <= 0xa2aa, 0)) \
|| (__builtin_expect (ch >= 0xa6e0, 0) \
&& __builtin_expect (ch <= 0xa6f5, 0)) \
|| (__builtin_expect (ch >= 0xa8bb, 0) \
&& __builtin_expect (ch <= 0xa8c0, 0))) \
{ \
/* One of the characters we cannot map. */ \
STANDARD_TO_LOOP_ERR_HANDLER (2); \
} \
\
/* Copy the two bytes. */ \
*outptr++ = *inptr++; \
*outptr++ = *inptr++; \
} \
}
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
/* Next, define the other direction. */
#define MIN_NEEDED_INPUT MIN_NEEDED_TO
#define MAX_NEEDED_INPUT MAX_NEEDED_TO
#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
#define LOOPFCT TO_LOOP
#define BODY \
{ \
/* We don't have to care about characters we cannot map. The only \
problem are the mapping of 0xA1A4 and 0xA1AA but as explained above \
we do not do anything special here. */ \
unsigned char ch = *inptr++; \
\
if (ch > 0x7f) \
{ \
if (__glibc_unlikely (inptr + 1 >= inend)) \
{ \
/* The second character is not available. Store \
the intermediate result. */ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
if (__glibc_unlikely (outend - outptr < 2)) \
{ \
/* We ran out of space. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
*outptr++ = ch; \
ch = *inptr++; \
} \
*outptr++ = ch; \
}
#include <iconv/loop.c>
/* Now define the toplevel functions. */
#include <iconv/skeleton.c>
|
