/* Mapping tables from GBK to GB2312 and vice versa. Copyright (C) 1999, 2000-2002 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #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 /* 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 (__builtin_expect (inptr + 1 >= inend, 0)) \ { \ /* The second character is not available. Store \ the intermediate result. */ \ result = __GCONV_INCOMPLETE_INPUT; \ break; \ } \ \ if (__builtin_expect (outend - outptr < 2, 0)) \ { \ /* 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 (__builtin_expect (ch == 0xa844, 0)) \ 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 (__builtin_expect (inptr + 1 >= inend, 0)) \ { \ /* The second character is not available. Store \ the intermediate result. */ \ result = __GCONV_INCOMPLETE_INPUT; \ break; \ } \ \ if (__builtin_expect (outend - outptr < 2, 0)) \ { \ /* 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>