77e1d15a1a
2000-03-28 Ulrich Drepper <drepper@redhat.com> * iconvdata/TESTS: Use UCS-2BE instead of UCS2. * iconv/loop.c: Define get16, get32, put16, and put32 macros to allow as well reading from/writing to unaligned addresses on machines which don't support this in hardware. Use FCTNAME macro to define function name. Include the file a second time for platforms which need special unaligned handling. * iconv/skeleton.c: Define get16u, get32u, put16u, and put32u macros to access potentially unaligned addresses. These macros are intended to be used only outside the loops. (unaligned): New definition. In case the machine can handle unaligned access define as zero. Otherwise as a variable which is initialized as nonzero in case the buffer passed in at runtime is unaligned with respect to the character set encoding involved. Call aligned or unaligned looop functions according to unaligned variable. * iconvdata/8bit-gap.c: Use get16, get32, put16, and put32 instead of direct casting pointer to potentially handle unaligned memory accesses. * iconvdata/8bit-generic.c: Likewise. * iconvdata/ansi_x3.110.c: Likewise. * iconvdata/big5.c: Likewise. * iconvdata/euc-cn.c: Likewise. * iconvdata/euc-jp.c: Likewise. * iconvdata/euc-kr.c: Likewise. * iconvdata/euc-tw.c: Likewise. * iconvdata/gbk.c: Likewise. * iconvdata/iso-2022-cn.c: Likewise. * iconvdata/iso-2022-jp.c: Likewise. * iconvdata/iso-2022-kr.c: Likewise. * iconvdata/iso646.c: Likewise. * iconvdata/iso_6937-2.c: Likewise. * iconvdata/iso_6937.c: Likewise. * iconvdata/johab.c: Likewise. * iconvdata/sjis.c: Likewise. * iconvdata/t.61.c: Likewise. * iconvdata/uhc.c: Likewise. * iconvdata/unicode.c: Likewise. * iconvdata/utf-16.c: Likewise. * locale/programs/simple-hash.c: Little optimizations. Remove K&R prototypes. * malloc/Versions [libc] (GLIBC_2.2): Add mcheck_check_all. * malloc/mcheck.c (mcheck_check_all): Renamed from check_all and made public. * malloc/mcheck.h (mcheck_check_all): Declare. * stdio-common/Makefile (tests): Add tst-obprintf.
400 lines
13 KiB
C
400 lines
13 KiB
C
/* Conversion module for ISO-2022-CN.
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Copyright (C) 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>, 1999.
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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 <gconv.h>
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#include <stdint.h>
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#include <string.h>
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#include "gb2312.h"
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#include "cns11643l1.h"
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#include "cns11643l2.h"
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#include <assert.h>
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/* This makes obvious what everybody knows: 0x1b is the Esc character. */
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#define ESC 0x1b
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/* We have single-byte shift-in and shift-out sequences, and the single
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shift sequence SS2 which replaces the SS2 designation for the next
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two bytes. */
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#define SI 0x0f
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#define SO 0x0e
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#define SS2_0 ESC
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#define SS2_1 0x4e
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/* Definitions used in the body of the `gconv' function. */
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#define CHARSET_NAME "ISO-2022-CN//"
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#define DEFINE_INIT 1
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#define DEFINE_FINI 1
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#define FROM_LOOP from_iso2022cn_loop
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#define TO_LOOP to_iso2022cn_loop
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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 MAX_NEEDED_TO 4
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#define PREPARE_LOOP \
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int save_set; \
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int *setp = &data->__statep->count;
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#define EXTRA_LOOP_ARGS , setp
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/* The COUNT element of the state keeps track of the currently selected
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character set. The possible values are: */
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enum
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{
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ASCII_set = 0,
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GB2312_set,
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CNS11643_1_set,
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CNS11643_2_set,
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CURRENT_MASK = 3,
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GB2312_ann = 4,
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CNS11643_1_ann = 8,
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CNS11643_2_ann = 16
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};
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/* Since this is a stateful encoding we have to provide code which resets
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the output state to the initial state. This has to be done during the
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flushing. */
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#define EMIT_SHIFT_TO_INIT \
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if (data->__statep->count != ASCII_set) \
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{ \
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if (FROM_DIRECTION) \
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/* It's easy, we don't have to emit anything, we just reset the \
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state for the input. */ \
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data->__statep->count = ASCII_set; \
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else \
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{ \
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unsigned char *outbuf = data->__outbuf; \
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\
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/* We are not in the initial state. To switch back we have \
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to emit `SI'. */ \
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if (outbuf == data->__outbufend) \
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/* We don't have enough room in the output buffer. */ \
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status = __GCONV_FULL_OUTPUT; \
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else \
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{ \
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/* Write out the shift sequence. */ \
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*outbuf++ = SI; \
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if (data->__is_last) \
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*written += 1; \
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data->__outbuf = outbuf; \
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data->__statep->count = ASCII_set; \
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} \
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} \
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}
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/* Since we might have to reset input pointer we must be able to save
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and retore the state. */
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#define SAVE_RESET_STATE(Save) \
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if (Save) \
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save_set = *setp; \
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else \
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*setp = save_set
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/* First define the conversion function from ISO-2022-CN 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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/* This is a 7bit character set, disallow all 8bit characters. */ \
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if (ch > 0x7f) \
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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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/* Recognize escape sequences. */ \
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if (ch == ESC) \
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{ \
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/* There are two kinds of escape sequences we have to handle: \
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- those announcing the use of GB and CNS characters on the \
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line; we can simply ignore them \
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- the initial byte of the SS2 sequence. \
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*/ \
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if (NEED_LENGTH_TEST \
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&& (inptr + 1 > inend \
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|| (inptr[1] == '$' \
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&& (inptr + 2 > inend \
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|| (inptr[2] == ')' && inptr + 3 > inend) \
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|| (inptr[2] == '*' && inptr + 3 > inend))) \
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|| (inptr[1] == SS2_1 && inptr + 3 > inend))) \
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{ \
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result = __GCONV_EMPTY_INPUT; \
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break; \
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} \
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if (inptr[1] == '$' \
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&& ((inptr[2] == ')' && (inptr[3] == 'A' || inptr[3] == 'G')) \
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|| (inptr[2] == '*' && inptr[3] == 'H'))) \
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{ \
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/* OK, we accept those character sets. */ \
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if (inptr[3] == 'A') \
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ann = GB2312_ann; \
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else if (inptr[3] == 'G') \
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ann = CNS11643_1_ann; \
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inptr += 4; \
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continue; \
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} \
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} \
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else if (ch == SO) \
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{ \
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/* Switch to use GB2312 or CNS 11643 plane 1, depending on which \
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S0 designation came last. The only problem is what to do with \
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faulty input files where no designator came. \
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XXX For now I'll default to use GB2312. If this is not the \
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best behaviour (e.g., we should flag an error) let me know. */ \
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++inptr; \
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set = ann == CNS11643_1_ann ? CNS11643_1_set : GB2312_set; \
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continue; \
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} \
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else if (ch == SI) \
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{ \
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/* Switch to use ASCII. */ \
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++inptr; \
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set = ASCII_set; \
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continue; \
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} \
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\
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if (ch == ESC && inptr[1] == SS2_1) \
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{ \
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/* This is a character from CNS 11643 plane 2. \
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XXX We could test here whether the use of this character \
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set was announced. */ \
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inptr += 2; \
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ch = cns11643l2_to_ucs4 (&inptr, 2, 0); \
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if (ch == __UNKNOWN_10646_CHAR) \
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{ \
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inptr -= 2; \
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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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else if (set == ASCII_set) \
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{ \
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/* Almost done, just advance the input pointer. */ \
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++inptr; \
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} \
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else \
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{ \
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/* That's pretty easy, we have a dedicated functions for this. */ \
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if (set == GB2312_set) \
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ch = gb2312_to_ucs4 (&inptr, \
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NEED_LENGTH_TEST ? inend - inptr : 2, 0); \
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else \
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{ \
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assert (set == CNS11643_1_set); \
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ch = cns11643l1_to_ucs4 (&inptr, \
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NEED_LENGTH_TEST ? inend - inptr : 2, 0);\
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} \
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\
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if (NEED_LENGTH_TEST && ch == 0) \
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{ \
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result = __GCONV_EMPTY_INPUT; \
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break; \
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} \
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else if (ch == __UNKNOWN_10646_CHAR) \
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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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\
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put32 (outptr, ch); \
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outptr += 4; \
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}
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#define EXTRA_LOOP_DECLS , int *setp
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#define INIT_PARAMS int set = *setp & CURRENT_MASK; \
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int ann = *setp & ~CURRENT_MASK
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#define UPDATE_PARAMS *setp = set | ann
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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; \
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size_t written = 0; \
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\
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ch = get32 (inptr); \
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\
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/* First see whether we can write the character using the currently \
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selected character set. */ \
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if (ch < 0x80) \
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{ \
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if (set != ASCII_set) \
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{ \
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*outptr++ = SI; \
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set = ASCII_set; \
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if (NEED_LENGTH_TEST && outptr == outend) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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} \
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\
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*outptr++ = ch; \
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written = 1; \
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\
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/* At the end of the line we have to clear the `ann' flags since \
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every line must contain this information again. */ \
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if (ch == L'\n') \
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ann = 0; \
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} \
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else \
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{ \
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char buf[2]; \
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int used; \
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\
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if (set == GB2312_set || (ann & CNS11643_1_ann) == 0) \
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{ \
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written = ucs4_to_gb2312 (ch, buf, 2); \
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used = GB2312_set; \
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} \
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else \
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{ \
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written = ucs4_to_cns11643l1 (ch, buf, 2); \
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used = CNS11643_1_set; \
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} \
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\
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if (written == __UNKNOWN_10646_CHAR) \
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{ \
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/* Cannot convert it using the currently selected SO set. \
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Next try the SS2 set. */ \
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written = ucs4_to_cns11643l2 (ch, buf, 2); \
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if (written != __UNKNOWN_10646_CHAR) \
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/* Yep, that worked. */ \
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used = CNS11643_2_set; \
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else \
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{ \
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/* Well, see whether we have to change the SO set. */ \
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if (set == GB2312_set) \
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written = ucs4_to_cns11643l1 (ch, buf, 2); \
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else \
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written = ucs4_to_gb2312 (ch, buf, 2); \
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\
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if (written != __UNKNOWN_10646_CHAR) \
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/* Oh well, then switch SO. */ \
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used = GB2312_set + CNS11643_1_set - set; \
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else \
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{ \
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/* Even this does not work. Error. */ \
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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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} \
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assert (written == 2); \
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\
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/* See whether we have to emit an escape sequence. */ \
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if (set != used) \
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{ \
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/* First see whether we announced that we use this \
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character set. */ \
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if ((ann & (2 << used)) == 0) \
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{ \
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const char *escseq; \
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\
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if (NEED_LENGTH_TEST && outptr + 4 > outend) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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\
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assert (used >= 1 && used <= 3); \
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escseq = "\e$)A\e$)G\e$*H" + (used - 1) * 4; \
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*outptr++ = *escseq++; \
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*outptr++ = *escseq++; \
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*outptr++ = *escseq++; \
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*outptr++ = *escseq++; \
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\
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if (used == GB2312_set) \
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ann = (ann & CNS11643_2_ann) | GB2312_ann; \
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else if (used == CNS11643_1_set) \
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ann = (ann & CNS11643_2_ann) | CNS11643_1_ann; \
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else \
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ann |= CNS11643_2_ann; \
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} \
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\
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if (used == CNS11643_2_set) \
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{ \
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if (outptr + 2 > outend) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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*outptr++ = SS2_0; \
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*outptr++ = SS2_1; \
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} \
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else \
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{ \
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/* We only have to emit something is currently ASCII is \
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selected. Otherwise we are switching within the \
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SO charset. */ \
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if (set == ASCII_set) \
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{ \
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if (outptr + 1 > outend) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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*outptr++ = SO; \
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} \
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} \
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\
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/* Always test the length here since we have used up all the \
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guaranteed output buffer slots. */ \
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if (outptr + 2 > outend) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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} \
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else if (NEED_LENGTH_TEST && outptr + 2 > outend) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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\
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*outptr++ = buf[0]; \
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*outptr++ = buf[1]; \
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} \
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\
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/* Now that we wrote the output increment the input pointer. */ \
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inptr += 4; \
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}
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#define EXTRA_LOOP_DECLS , int *setp
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#define INIT_PARAMS int set = *setp & CURRENT_MASK; \
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int ann = *setp & ~CURRENT_MASK
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#define UPDATE_PARAMS *setp = set | ann
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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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