1 /* Mapping tables from GBK to GB2312 and vice versa.
2 Copyright (C) 1999, 2000 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library 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 GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 /* Definitions used in the body of the `gconv' function. */
26 #define CHARSET_NAME "GBK//"
27 #define FROM_LOOP from_gbk_to_gb
28 #define TO_LOOP from_gb_to_gbk
31 #define MIN_NEEDED_FROM 1
32 #define MAX_NEEDED_FROM 2
33 #define MIN_NEEDED_TO 1
34 #define MAX_NEEDED_TO 2
37 /* First define the conversion function from GBK to GB2312. */
38 #define MIN_NEEDED_INPUT MIN_NEEDED_FROM
39 #define MAX_NEEDED_INPUT MAX_NEEDED_FROM
40 #define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
41 #define MAX_NEEDED_OUTPUT MAX_NEEDED_TO
42 #define LOOPFCT FROM_LOOP
45 uint32_t ch = *inptr; \
48 *outptr++ = *inptr++; \
51 /* It's a two-byte sequence. We have to mask out all the sequences \
52 which are not in GB2312. Besides all of them in the range \
53 0x8140 to 0xA0FE this also includes in the remaining range the \
54 sequences which the second byte being in the range from 0x40 to \
55 0xA0 and the following exceptions: \
64 All these characters are not defined in GB2312. Besides this \
65 there is an incomatibility in the mapping. The Unicode tables \
66 say that 0xA1A4 maps in GB2312 to U30FB while in GBK it maps to \
67 U00B7. Since we are free to do whatever we want if a mapping \
68 is not available we will not flag this as an error but instead \
69 map the two positions. But this means that the mapping \
71 UCS4 -> GB2312 -> GBK -> UCS4 \
73 might not produce identical text. */ \
74 if (NEED_LENGTH_TEST && inptr + 1 >= inend) \
76 /* The second character is not available. Store \
77 the intermediate result. */ \
78 result = __GCONV_INCOMPLETE_INPUT; \
82 if (NEED_LENGTH_TEST && outend - outptr < 2) \
84 /* We ran out of space. */ \
85 result = __GCONV_FULL_OUTPUT; \
89 ch = (ch << 8) | inptr[1]; \
91 /* Now determine whether the character is valid. */ \
92 if (ch >= 0xa1a1 && ch <= 0xf7fe && inptr[1] >= 0xa1) \
94 /* So far so good. Now test the exceptions. */ \
95 if ((ch >= 0xa2a1 && ch <= 0xa2aa) \
96 || (ch >= 0xa6e0 && ch <= 0xa6f5) \
97 || (ch >= 0xa8bb && ch <= 0xa8c0)) \
99 /* One of the exceptions. */ \
100 result = __GCONV_ILLEGAL_INPUT; \
106 /* One of the characters we cannot map. */ \
107 result = __GCONV_ILLEGAL_INPUT; \
111 /* Copy the two bytes. */ \
112 *outptr++ = *inptr++; \
113 *outptr++ = *inptr++; \
116 #include <iconv/loop.c>
119 /* Next, define the other direction. */
120 #define MIN_NEEDED_INPUT MIN_NEEDED_TO
121 #define MAX_NEEDED_INPUT MAX_NEEDED_TO
122 #define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
123 #define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
124 #define LOOPFCT TO_LOOP
127 /* We don't have to care about characters we cannot map. The only \
128 problem is the mapping of 0xA1A4 but as explained above we do not \
129 do anything special here. */ \
130 unsigned char ch = *inptr++; \
134 if (NEED_LENGTH_TEST && inptr + 1 >= inend) \
136 /* The second character is not available. Store \
137 the intermediate result. */ \
138 result = __GCONV_INCOMPLETE_INPUT; \
142 if (NEED_LENGTH_TEST && outend - outptr < 2) \
144 /* We ran out of space. */ \
145 result = __GCONV_FULL_OUTPUT; \
154 #include <iconv/loop.c>
157 /* Now define the toplevel functions. */
158 #include <iconv/skeleton.c>