108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/* Generic conversion to and from 8bit charsets,
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converting from UCS using gaps.
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Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <dlfcn.h>
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#include <stdint.h>
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struct gap
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{
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uint16_t start;
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uint16_t end;
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int32_t idx;
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};
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/* Now we can include the tables. */
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#include TABLES
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#define FROM_LOOP from_gap
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#define TO_LOOP to_gap
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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 MIN_NEEDED_TO 4
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/* First define the conversion function from the 8bit charset to UCS4. */
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#define MIN_NEEDED_INPUT MIN_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 = to_ucs4[*inptr]; \
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\
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if (HAS_HOLES && __builtin_expect (ch, L'\1') == L'\0' && *inptr != '\0') \
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{ \
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/* This is an illegal character. */ \
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if (! ignore_errors_p ()) \
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{ \
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result = __GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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\
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++*irreversible; \
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} \
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else \
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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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\
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++inptr; \
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}
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#define LOOP_NEED_FLAGS
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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 LOOPFCT TO_LOOP
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#define BODY \
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{ \
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const struct gap *rp = from_idx; \
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uint32_t ch = get32 (inptr); \
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unsigned char res; \
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\
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if (__builtin_expect (ch, 0) >= 0xffff) \
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rp = NULL; \
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else \
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while (ch > rp->end) \
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++rp; \
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if (__builtin_expect (rp == NULL, 0) \
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|| __builtin_expect (ch < rp->start, 0) \
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|| (res = from_ucs4[ch + rp->idx], \
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__builtin_expect (res, '\1') == '\0' && ch != 0)) \
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{ \
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/* This is an illegal character. */ \
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STANDARD_ERR_HANDLER (4); \
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} \
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\
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*outptr++ = res; \
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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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