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Diffstat (limited to 'REORG.TODO/iconvdata/gbgbk.c')
| -rw-r--r-- | REORG.TODO/iconvdata/gbgbk.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/REORG.TODO/iconvdata/gbgbk.c b/REORG.TODO/iconvdata/gbgbk.c new file mode 100644 index 0000000000..01832914a4 --- /dev/null +++ b/REORG.TODO/iconvdata/gbgbk.c @@ -0,0 +1,162 @@ +/* Mapping tables from GBK to GB2312 and vice versa. + Copyright (C) 1999-2017 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> |