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Diffstat (limited to 'iconvdata/gbgbk.c')
| -rw-r--r-- | iconvdata/gbgbk.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/iconvdata/gbgbk.c b/iconvdata/gbgbk.c new file mode 100644 index 0000000000..95aaba24a0 --- /dev/null +++ b/iconvdata/gbgbk.c @@ -0,0 +1,135 @@ +/* Mapping tables from GBK to GB2312 and vice versa. + Copyright (C) 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#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 + + +/* First define the conversion function from ISO 8859-1 to UCS4. */ +#define MIN_NEEDED_INPUT MIN_NEEDED_FROM +#define MAX_NEEDED_INPUT MAX_NEEDED_FROM +#define MIN_NEEDED_OUTPUT MIN_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. 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 (NEED_LENGTH_TEST && inptr + 1 >= inend) \ + { \ + /* The second character is not available. Store \ + the intermediate result. */ \ + result = __GCONV_INCOMPLETE_INPUT; \ + break; \ + } \ + \ + ch = (ch << 8) | inptr[1]; \ + \ + /* Now determine whether the character is valid. */ \ + if (ch >= 0xa1a1 && ch <= 0x777e \ + && inptr[1] >= 0xa1 && inptr[1] != 0xff) \ + { \ + /* So far so good. Now test the exceptions. */ \ + if ((ch >= 0xa2a1 && ch <= 0xa2aa) \ + || (ch >= 0xa6e0 && ch <= 0xa6f5) \ + || (ch >= 0xa8bb && ch <= 0xa8c0)) \ + { \ + /* One of the exceptions. */ \ + result = __GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + } \ + else \ + { \ + /* One of the characters we cannot map. */ \ + result = __GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + \ + /* Copy the two bytes. */ \ + *outptr++ = *inptr++; \ + *outptr++ = *inptr++; \ + } \ + } +#include <iconv/loop.c> + + +/* Next, define the other direction. */ +#define MIN_NEEDED_INPUT MIN_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 is the mapping of 0xA1A4 but as explained above we do not \ + do anything special here. */ \ + unsigned char ch = *inptr++; \ + \ + if (ch > 0x7f) \ + { \ + *outptr++ = ch; \ + ch = *inptr++; \ + } \ + *outptr++ = ch; \ + } +#include <iconv/loop.c> + + +/* Now define the toplevel functions. */ +#include <iconv/skeleton.c> |