189 lines
6.2 KiB
C
189 lines
6.2 KiB
C
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/* Mapping tables for EUC-TW handling.
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Copyright (C) 1998-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dlfcn.h>
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#include <stdint.h>
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#include <cns11643l1.h>
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#include <cns11643.h>
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/* Definitions used in the body of the `gconv' function. */
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#define CHARSET_NAME "EUC-TW//"
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#define FROM_LOOP from_euc_tw
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#define TO_LOOP to_euc_tw
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#define DEFINE_INIT 1
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#define DEFINE_FINI 1
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#define MIN_NEEDED_FROM 1
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#define MAX_NEEDED_FROM 4
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#define MIN_NEEDED_TO 4
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#define ONE_DIRECTION 0
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/* First define the conversion function from EUC-TW to UCS4. */
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#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
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#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
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#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
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#define LOOPFCT FROM_LOOP
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#define BODY \
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{ \
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uint32_t ch = *inptr; \
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\
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if (ch <= 0x7f) \
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/* Plain ASCII. */ \
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++inptr; \
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else if ((ch <= 0xa0 || ch > 0xfe) && ch != 0x8e) \
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{ \
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/* This is illegal. */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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} \
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else \
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{ \
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/* Two or more byte character. First test whether the next byte \
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is also available. */ \
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uint32_t ch2; \
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\
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if (inptr + 1 >= inend) \
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{ \
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/* The second byte is not available. Store the intermediate \
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result. */ \
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result = __GCONV_INCOMPLETE_INPUT; \
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break; \
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} \
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\
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ch2 = *(inptr + 1); \
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\
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/* All second bytes of a multibyte character must be >= 0xa1. */ \
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if (ch2 < 0xa1 || ch2 == 0xff) \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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\
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if (ch == 0x8e) \
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{ \
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/* This is code set 2: CNS 11643, planes 1 to 16. */ \
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const unsigned char *endp = inptr + 1; \
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\
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ch = cns11643_to_ucs4 (&endp, inend - inptr - 1, 0x80); \
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\
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if (ch == 0) \
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{ \
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/* The third or fourth byte is not available. Store \
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the intermediate result. */ \
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result = __GCONV_INCOMPLETE_INPUT; \
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break; \
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} \
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\
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if (ch == __UNKNOWN_10646_CHAR) \
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/* Illegal input. */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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\
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inptr += 4; \
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} \
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else \
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{ \
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/* This is code set 1: CNS 11643, plane 1. */ \
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const unsigned char *endp = inptr; \
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\
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ch = cns11643l1_to_ucs4 (&endp, inend - inptr, 0x80); \
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/* Please note that we need not test for the missing input \
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characters here anymore. */ \
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if (ch == __UNKNOWN_10646_CHAR) \
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/* Illegal input. */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (2); \
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\
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inptr += 2; \
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} \
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} \
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\
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put32 (outptr, ch); \
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outptr += 4; \
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}
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#define LOOP_NEED_FLAGS
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#define ONEBYTE_BODY \
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{ \
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if (c < 0x80) \
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return c; \
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else \
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return WEOF; \
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}
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#include <iconv/loop.c>
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/* Next, define the other direction. */
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#define MIN_NEEDED_INPUT MIN_NEEDED_TO
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#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
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#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
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#define LOOPFCT TO_LOOP
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#define BODY \
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{ \
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uint32_t ch = get32 (inptr); \
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\
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if (ch <= 0x7f) \
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/* It's plain ASCII. */ \
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*outptr++ = ch; \
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else \
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{ \
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/* Try the CNS 11643 planes. */ \
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size_t found; \
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\
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found = ucs4_to_cns11643l1 (ch, outptr, outend - outptr); \
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if (__builtin_expect (found, 1) == 0) \
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{ \
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/* We ran out of space. */ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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if (__builtin_expect (found, 1) != __UNKNOWN_10646_CHAR) \
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{ \
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/* It's a CNS 11643, plane 1 character, adjust it for EUC-TW. */ \
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*outptr++ += 0x80; \
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*outptr++ += 0x80; \
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} \
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else \
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{ \
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/* No CNS 11643, plane 1 character. */ \
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\
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found = ucs4_to_cns11643 (ch, outptr + 1, outend - outptr - 1); \
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if (__builtin_expect (found, 1) == 0) \
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{ \
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/* We ran out of space. */ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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if (__builtin_expect (found, 0) == __UNKNOWN_10646_CHAR) \
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{ \
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UNICODE_TAG_HANDLER (ch, 4); \
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\
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/* Illegal character. */ \
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STANDARD_TO_LOOP_ERR_HANDLER (4); \
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} \
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\
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/* It's a CNS 11643 character, adjust it for EUC-TW. */ \
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*outptr++ = '\x8e'; \
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*outptr++ += 0xa0; \
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*outptr++ += 0x80; \
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*outptr++ += 0x80; \
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} \
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} \
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\
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inptr += 4; \
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}
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#define LOOP_NEED_FLAGS
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#include <iconv/loop.c>
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/* Now define the toplevel functions. */
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#include <iconv/skeleton.c>
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