[thirdparty/glibc.git] / iconvdata / iso-2022-cn-ext.c

/* Conversion module for ISO-2022-CN-EXT.
   Copyright (C) 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  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>
#include <string.h>
#include "gb2312.h"
#include "iso-ir-165.h"
#include "cns11643.h"
#include "cns11643l1.h"
#include "cns11643l2.h"

#include <assert.h>

/* This makes obvious what everybody knows: 0x1b is the Esc character.  */
#define ESC	0x1b

/* We have single-byte shift-in and shift-out sequences, and the single
   shift sequences SS2 and SS3 which replaces the SS2/SS3 designation for
   the next two bytes.  */
#define SI	0x0f
#define SO	0x0e
#define SS2_0	ESC
#define SS2_1	0x4e
#define SS3_0	ESC
#define SS3_1	0x4f

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME		"ISO-2022-CN-EXT//"
#define DEFINE_INIT		1
#define DEFINE_FINI		1
#define FROM_LOOP		from_iso2022cn_ext_loop
#define TO_LOOP			to_iso2022cn_ext_loop
#define MIN_NEEDED_FROM		1
#define MAX_NEEDED_FROM		4
#define MIN_NEEDED_TO		4
#define MAX_NEEDED_TO		4
#define PREPARE_LOOP \
  int save_set;								      \
  int *setp = &data->__statep->__count;
#define EXTRA_LOOP_ARGS		, setp


/* The charsets GB/T 12345-90, GB 7589-87, GB/T 13131-9X, GB 7590-87,
   and GB/T 13132-9X are not registered to the best of my knowledge and
   therefore have no escape sequence assigned.  We cannot handle them
   for this reason.  Tell the implementation about this.  */
#define X12345	'\0'
#define X7589	'\0'
#define X13131	'\0'
#define X7590	'\0'
#define X13132	'\0'


/* The COUNT element of the state keeps track of the currently selected
   character set.  The possible values are:  */
enum
{
  ASCII_set = 0,
  GB2312_set,
  GB12345_set,
  CNS11643_1_set,
  ISO_IR_165_set,
  SO_mask = 7,

  GB7589_set = 1 << 3,
  GB13131_set = 2 << 3,
  CNS11643_2_set = 3 << 3,
  SS2_mask = 3 << 3,

  GB7590_set = 1 << 5,
  GB13132_set = 2 << 5,
  CNS11643_3_set = 3 << 5,
  CNS11643_4_set = 4 << 5,
  CNS11643_5_set = 5 << 5,
  CNS11643_6_set = 6 << 5,
  CNS11643_7_set = 7 << 5,
  SS3_mask = 7 << 5,

#define CURRENT_MASK (SO_mask | SS2_mask | SS3_mask)

  GB2312_ann = 1 << 8,
  GB12345_ann = 2 << 8,
  CNS11643_1_ann = 3 << 8,
  ISO_IR_165_ann = 4 << 8,
  SO_ann = 7 << 8,

  GB7589_ann = 1 << 11,
  GB13131_ann = 2 << 11,
  CNS11643_2_ann = 3 << 11,
  SS2_ann = 3 << 11,

  GB7590_ann = 1 << 13,
  GB13132_ann = 2 << 13,
  CNS11643_3_ann = 3 << 13,
  CNS11643_4_ann = 4 << 13,
  CNS11643_5_ann = 5 << 13,
  CNS11643_6_ann = 6 << 13,
  CNS11643_7_ann = 7 << 13,
  SS3_ann = 7 << 13
};


/* Since this is a stateful encoding we have to provide code which resets
   the output state to the initial state.  This has to be done during the
   flushing.  */
#define EMIT_SHIFT_TO_INIT \
  if (data->__statep->__count >> 3 != ASCII_set)			      \
    {									      \
      if (FROM_DIRECTION)						      \
	/* It's easy, we don't have to emit anything, we just reset the	      \
	   state for the input.  */					      \
	data->__statep->__count = ASCII_set << 3;			      \
      else								      \
	{								      \
	  unsigned char *outbuf = data->__outbuf;			      \
	  								      \
	  /* We are not in the initial state.  To switch back we have	      \
	     to emit `SI'.  */						      \
	  if (outbuf == data->__outbufend)				      \
	    /* We don't have enough room in the output buffer.  */	      \
	    status = __GCONV_FULL_OUTPUT;				      \
	  else								      \
	    {								      \
	      /* Write out the shift sequence.  */			      \
	      *outbuf++ = SI;						      \
	      if (data->__flags & __GCONV_IS_LAST)			      \
		*irreversible += 1;					      \
	      data->__outbuf = outbuf;					      \
	      data->__statep->__count = ASCII_set << 3;			      \
	    }								      \
	}								      \
    }


/* Since we might have to reset input pointer we must be able to save
   and retore the state.  */
#define SAVE_RESET_STATE(Save) \
  if (Save)								      \
    save_set = *setp;							      \
  else									      \
    *setp = save_set


/* First define the conversion function from ISO-2022-CN to UCS4.  */
#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint32_t ch = *inptr;						      \
									      \
    /* This is a 7bit character set, disallow all 8bit characters.  */	      \
    if (ch > 0x7f)							      \
      {									      \
	if (! ignore_errors_p ())					      \
	  {								      \
	    result = __GCONV_ILLEGAL_INPUT;				      \
	    break;							      \
	  }								      \
	++inptr;							      \
	++*irreversible;						      \
	continue;							      \
      }									      \
									      \
    /* Recognize escape sequences.  */					      \
    if (ch == ESC)							      \
      {									      \
	/* There are three kinds of escape sequences we have to handle:	      \
	   - those announcing the use of GB and CNS characters on the	      \
	     line; we can simply ignore them				      \
	   - the initial byte of the SS2 sequence.			      \
	   - the initial byte of the SS3 sequence.			      \
	*/								      \
	if (inptr + 2 > inend						      \
	    || (inptr[1] == '$'						      \
		&& (inptr + 3 > inend					      \
		    || (inptr[2] == ')' && inptr + 4 > inend)		      \
		    || (inptr[2] == '*' && inptr + 4 > inend)		      \
		    || (inptr[2] == '+' && inptr + 4 > inend)))		      \
	    || (inptr[1] == SS2_1 && inptr + 4 > inend)			      \
	    || (inptr[1] == SS3_1 && inptr + 4 > inend))		      \
	  {								      \
	    result = __GCONV_INCOMPLETE_INPUT;				      \
	    break;							      \
	  }								      \
	if (inptr[1] == '$'						      \
	    && ((inptr[2] == ')'					      \
		 && (inptr[3] == 'A'					      \
		     || (X12345 != '\0' && inptr[3] == X12345)		      \
		     || inptr[3] == 'E' || inptr[3] == 'G'))		      \
		|| (inptr[2] == '*'					      \
		    && ((X7589 != '\0' && inptr[3] == X7589)		      \
			|| (X13131 != '\0' && inptr[3] == X13131)	      \
			|| inptr[3] == 'H'))				      \
		|| (inptr[2] == '+'					      \
		    && ((X7590 != '\0' && inptr[3] == X7590)		      \
			|| (X13132 != '\0' && inptr[3] == X13132)	      \
			|| inptr[3] == 'I' || inptr[3] == 'J'		      \
			|| inptr[3] == 'K' || inptr[3] == 'L'		      \
			|| inptr[3] == 'M'))))				      \
	  {								      \
	    /* OK, we accept those character sets.  */			      \
	    if (inptr[3] == 'A')					      \
	      ann = (ann & ~SO_ann) | GB2312_ann;			      \
	    else if (inptr[3] == 'G')					      \
	      ann = (ann & ~SO_ann) | CNS11643_1_ann;			      \
	    else if (inptr[3] == 'E')					      \
	      ann = (ann & ~SO_ann) | ISO_IR_165_ann;			      \
	    else if (X12345 != '\0' && inptr[3] == X12345)		      \
	      ann = (ann & ~SO_ann) | GB12345_ann;			      \
	    else if (inptr[3] == 'H')					      \
	      ann = (ann & ~SS2_ann) | CNS11643_2_ann;			      \
	    else if (X7589 != '\0' && inptr[3] == X7589)		      \
	      ann = (ann & ~SS2_ann) | GB7589_ann;			      \
	    else if (X13131 != '\0' && inptr[3] == X13131)		      \
	      ann = (ann & ~SS2_ann) | GB13131_ann;			      \
	    else if (inptr[3] == 'I')					      \
	      ann = (ann & ~SS3_ann) | CNS11643_3_ann;			      \
	    else if (inptr[3] == 'J')					      \
	      ann = (ann & ~SS3_ann) | CNS11643_4_ann;			      \
	    else if (inptr[3] == 'K')					      \
	      ann = (ann & ~SS3_ann) | CNS11643_5_ann;			      \
	    else if (inptr[3] == 'L')					      \
	      ann = (ann & ~SS3_ann) | CNS11643_6_ann;			      \
	    else if (inptr[3] == 'M')					      \
	      ann = (ann & ~SS3_ann) | CNS11643_7_ann;			      \
	    else if (X7590 != '\0' && inptr[3] == X7590)		      \
	      ann = (ann & ~SS3_ann) | GB7590_ann;			      \
	    else if (X13132 != '\0' && inptr[3] == X13132)		      \
	      ann = (ann & ~SS3_ann) | GB13132_ann;			      \
	    inptr += 4;							      \
	    continue;							      \
	  }								      \
      }									      \
    else if (ch == SO)							      \
      {									      \
	/* Switch to use GB2312, GB12345, CNS 11643 plane 1, or ISO-IR-165,   \
	   depending on which S0 designation came last.  The only problem     \
	   is what to do with faulty input files where no designator came.    \
	   XXX For now I'll default to use GB2312.  If this is not the	      \
	   best behavior (e.g., we should flag an error) let me know.  */     \
	++inptr;							      \
	switch (ann & SO_ann)						      \
	  {								      \
	  case GB2312_ann:						      \
	    set = GB2312_set;						      \
	    break;							      \
	  case GB12345_ann:						      \
	    set = GB12345_set;						      \
	    break;							      \
	  case CNS11643_1_ann:						      \
	    set = CNS11643_1_set;					      \
	    break;							      \
	  default:							      \
	    assert ((ann & SO_ann) == ISO_IR_165_ann);			      \
	    set = ISO_IR_165_set;					      \
	    break;							      \
	  }								      \
	continue;							      \
      }									      \
    else if (ch == SI)							      \
      {									      \
	/* Switch to use ASCII.  */					      \
	++inptr;							      \
	set = ASCII_set;						      \
	continue;							      \
      }									      \
									      \
    if (ch == ESC && inptr[1] == SS2_1)					      \
      {									      \
	/* This is a character from CNS 11643 plane 2.			      \
	   XXX We could test here whether the use of this character	      \
	   set was announced.						      \
	   XXX Current GB7589 and GB13131 are not supported.  */	      \
	inptr += 2;							      \
	ch = cns11643l2_to_ucs4 (&inptr, 2, 0);				      \
	if (ch == __UNKNOWN_10646_CHAR)					      \
	  {								      \
	    if (! ignore_errors_p ())					      \
	      {								      \
		inptr -= 2;						      \
		result = __GCONV_ILLEGAL_INPUT;				      \
		break;							      \
	      }								      \
	    inptr += 2;							      \
	    ++*irreversible;						      \
	    continue;							      \
	  }								      \
      }									      \
    /* Note that we can assume here that at least 4 bytes are available if    \
       the first byte is ESC since otherwise the first if would have been     \
       true.  */							      \
    else if (ch == ESC && inptr[1] == SS3_1)				      \
      {									      \
	/* This is a character from CNS 11643 plane 3 or higher.	      \
	   XXX Currently GB7590 and GB13132 are not supported.  */	      \
	char buf[3];							      \
	const char *tmp = buf;						      \
									      \
	buf[1] = inptr[2];						      \
	buf[2] = inptr[3];						      \
	switch (ann & SS3_ann)						      \
	  {								      \
	  case CNS11643_3_ann:						      \
	    /* CNS 11643 plane 3 is part of the old CNS 11643 plane 14.  */   \
	    if (buf[1] < 0x62 || (buf[1] == 0x62 && buf[2] <= 0x45))	      \
	      {								      \
		buf[0] = 0x2e;						      \
		ch = cns11643_to_ucs4 (&tmp, 3, 0);			      \
	      }								      \
	    else							      \
	      ch = __UNKNOWN_10646_CHAR;				      \
	    break;							      \
	  default:							      \
	    /* XXX Currently planes 4 to 7 are not supported.  */	      \
	    ch = __UNKNOWN_10646_CHAR;					      \
	    break;							      \
	  }								      \
	if (ch == __UNKNOWN_10646_CHAR)					      \
	  {								      \
	    if (! ignore_errors_p ())					      \
	      {								      \
		result = __GCONV_ILLEGAL_INPUT;				      \
		break;							      \
	      }								      \
	    inptr += 4;							      \
	    ++*irreversible;						      \
	    continue;							      \
	  }								      \
	assert (tmp == buf + 3);					      \
	inptr += 4;							      \
      }									      \
    else if (set == ASCII_set)						      \
      {									      \
	/* Almost done, just advance the input pointer.  */		      \
	++inptr;							      \
      }									      \
    else								      \
      {									      \
	/* That's pretty easy, we have a dedicated functions for this.  */    \
	if (inend - inptr < 2)						      \
	  {								      \
	    result = __GCONV_INCOMPLETE_INPUT;				      \
	    break;							      \
	  }								      \
	if (set == GB2312_set)						      \
	  ch = gb2312_to_ucs4 (&inptr, inend - inptr, 0);		      \
	else if (set == ISO_IR_165_set)					      \
	  ch = isoir165_to_ucs4 (&inptr, inend - inptr);		      \
	else								      \
	  {								      \
	    assert (set == CNS11643_1_set);				      \
	    ch = cns11643l1_to_ucs4 (&inptr, inend - inptr, 0);		      \
	  }								      \
									      \
	if (ch == 0)							      \
	  {								      \
	    result = __GCONV_INCOMPLETE_INPUT;				      \
	    break;							      \
	  }								      \
	else if (ch == __UNKNOWN_10646_CHAR)				      \
	  {								      \
	    if (! ignore_errors_p ())					      \
	      {								      \
		result = __GCONV_ILLEGAL_INPUT;				      \
		break;							      \
	      }								      \
	    inptr += 2;							      \
	    ++*irreversible;						      \
	    continue;							      \
	  }								      \
      }									      \
									      \
    *((uint32_t *) outptr)++ = ch;					      \
  }
#define EXTRA_LOOP_DECLS	, int *setp
#define INIT_PARAMS		int set = (*setp >> 3) & CURRENT_MASK; \
				int ann = (*setp >> 3) & ~CURRENT_MASK
#define UPDATE_PARAMS		*setp = (set | ann) << 3
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>


/* Next, define the other direction.  */
#define MIN_NEEDED_INPUT	MIN_NEEDED_TO
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM
#define MAX_NEEDED_OUTPUT	MAX_NEEDED_FROM
#define LOOPFCT			TO_LOOP
#define BODY \
  {									      \
    uint32_t ch;							      \
    size_t written = 0;							      \
									      \
    ch = *((const uint32_t *) inptr);					      \
									      \
    /* First see whether we can write the character using the currently	      \
       selected character set.  */					      \
    if (ch < 0x80)							      \
      {									      \
	if (set != ASCII_set)						      \
	  {								      \
	    *outptr++ = SI;						      \
	    set = ASCII_set;						      \
	    if (outptr == outend)					      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	  }								      \
									      \
	*outptr++ = ch;							      \
	written = 1;							      \
									      \
	/* At the end of the line we have to clear the `ann' flags since      \
	   every line must contain this information again.  */		      \
	if (ch == L'\n')						      \
	  ann = 0;							      \
      }									      \
    else								      \
      {									      \
	char buf[2];							      \
	int used;							      \
									      \
	if (set == GB2312_set || ((ann & SO_ann) != CNS11643_1_ann	      \
				  && (ann & SO_ann) != ISO_IR_165_ann))	      \
	  {								      \
	    written = ucs4_to_gb2312 (ch, buf, 2);			      \
	    used = GB2312_set;						      \
	  }								      \
	else if (set == ISO_IR_165_set || (ann & SO_ann) == ISO_IR_165_set)   \
	  {								      \
	    written = ucs4_to_isoir165 (ch, buf, 2);			      \
	    used = ISO_IR_165_set;					      \
	  }								      \
	else								      \
	  {								      \
	    written = ucs4_to_cns11643l1 (ch, buf, 2);			      \
	    used = CNS11643_1_set;					      \
	  }								      \
									      \
	if (written == __UNKNOWN_10646_CHAR)				      \
	  {								      \
	    /* Cannot convert it using the currently selected SO set.	      \
	       Next try the SS2 set.  */				      \
	    written = ucs4_to_cns11643l2 (ch, buf, 2);			      \
	    if (written != __UNKNOWN_10646_CHAR)			      \
	      /* Yep, that worked.  */					      \
	      used = CNS11643_2_set;					      \
	    else							      \
	      {								      \
		char tmpbuf[3];						      \
									      \
		switch (0)						      \
		  {							      \
		  default:						      \
		    /* Well, see whether we have to change the SO set.  */    \
									      \
		    if (used != GB2312_set)				      \
		      {							      \
			written = ucs4_to_gb2312 (ch, buf, 2);		      \
			if (written != __UNKNOWN_10646_CHAR)		      \
			  {						      \
			    used = GB2312_set;				      \
			    break;					      \
			  }						      \
		      }							      \
									      \
		    if (used != ISO_IR_165_set)				      \
		      {							      \
			written = ucs4_to_isoir165 (ch, buf, 2);	      \
			if (written != __UNKNOWN_10646_CHAR)		      \
			  {						      \
			    used = ISO_IR_165_set;			      \
			    break;					      \
			  }						      \
		      }							      \
									      \
		    if (used != CNS11643_1_set)				      \
		      {							      \
			written = ucs4_to_cns11643l1 (ch, buf, 2);	      \
			if (written != __UNKNOWN_10646_CHAR)		      \
			  {						      \
			    used = CNS11643_1_set;			      \
			    break;					      \
			  }						      \
		      }							      \
									      \
		    written = ucs4_to_cns11643 (ch, tmpbuf, 3);		      \
		    if (written == 3 && tmpbuf[0] != 1 && tmpbuf[0] != 2)     \
		      {							      \
			buf[0] = tmpbuf[1];				      \
			buf[1] = tmpbuf[2];				      \
			written = 2;					      \
			/* CNS 11643 plane 3 is part of the old CNS 11643     \
			   plane 14.					      \
			   XXX Currently planes 4 to 7 are not supported.  */ \
			if (tmpbuf[0] == 14				      \
			    && (tmpbuf[1] < 0x62			      \
				|| (tmpbuf[1] == 0x62 && tmpbuf[2] <= 0x45))) \
			  {						      \
			    used = CNS11643_3_set;			      \
			    break;					      \
			  }						      \
		      }							      \
									      \
		    /* Even this does not work.  Error.  */		      \
		    used = ASCII_set;					      \
		  }							      \
		if (used == ASCII_set)					      \
		  {							      \
		    STANDARD_ERR_HANDLER (4);				      \
		  }							      \
	      }								      \
	  }								      \
	assert (written == 2);						      \
									      \
	/* See whether we have to emit an escape sequence.  */		      \
	if (set != used)						      \
	  {								      \
	    /* First see whether we announced that we use this		      \
	       character set.  */					      \
	    if ((used & SO_mask) != 0 && (ann & SO_ann) != (used << 8))	      \
	      {								      \
		const char *escseq;					      \
									      \
		if (outptr + 4 > outend)				      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
									      \
		assert (used >= 1 && used <= 4);			      \
		escseq = ")A\0\0)G)E" + (used - 1) * 2;			      \
		*outptr++ = ESC;					      \
		*outptr++ = '$';					      \
		*outptr++ = *escseq++;					      \
		*outptr++ = *escseq++;					      \
									      \
		ann = (ann & ~SO_ann) | (used << 8);			      \
	      }								      \
	    else if ((used & SS2_mask) != 0 && (ann & SS2_ann) != (used << 8))\
	      {								      \
		const char *escseq;					      \
									      \
		assert (used == CNS11643_2_set); /* XXX */		      \
		escseq = "*H";						      \
		*outptr++ = ESC;					      \
		*outptr++ = '$';					      \
		*outptr++ = *escseq++;					      \
		*outptr++ = *escseq++;					      \
									      \
		ann = (ann & ~SS2_ann) | (used << 8);			      \
	      }								      \
	    else if ((used & SS3_mask) != 0 && (ann & SS3_ann) != (used << 8))\
	      {								      \
		const char *escseq;					      \
									      \
		assert ((used >> 5) >= 3 && (used >> 5) <= 7);		      \
		escseq = "+I+J+K+L+M" + ((used >> 5) - 3) * 2;		      \
		*outptr++ = ESC;					      \
		*outptr++ = '$';					      \
		*outptr++ = *escseq++;					      \
		*outptr++ = *escseq++;					      \
									      \
		ann = (ann & ~SS3_ann) | (used << 8);			      \
	      }								      \
									      \
	    if (used == CNS11643_2_set)					      \
	      {								      \
		if (outptr + 2 > outend)				      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
		*outptr++ = SS2_0;					      \
		*outptr++ = SS2_1;					      \
	      }								      \
	    else if (used >= CNS11643_3_set && used <= CNS11643_7_set)	      \
	      {								      \
		if (outptr + 2 > outend)				      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
		*outptr++ = SS3_0;					      \
		*outptr++ = SS3_1;					      \
	      }								      \
	    else							      \
	      {								      \
		/* We only have to emit something if currently ASCII is	      \
		   selected.  Otherwise we are switching within the	      \
		   SO charset.  */					      \
		if (set == ASCII_set)					      \
		  {							      \
		    if (outptr + 1 > outend)				      \
		      {							      \
			result = __GCONV_FULL_OUTPUT;			      \
			break;						      \
		      }							      \
		    *outptr++ = SO;					      \
		  }							      \
	      }								      \
									      \
	    /* Always test the length here since we have used up all the      \
	       guaranteed output buffer slots.  */			      \
	    if (outptr + 2 > outend)					      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	  }								      \
	else if (outptr + 2 > outend)					      \
	  {								      \
	    result = __GCONV_FULL_OUTPUT;				      \
	    break;							      \
	  }								      \
									      \
	*outptr++ = buf[0];						      \
	*outptr++ = buf[1];						      \
	set = used;							      \
      }									      \
									      \
    /* Now that we wrote the output increment the input pointer.  */	      \
    inptr += 4;								      \
  }
#define EXTRA_LOOP_DECLS	, int *setp
#define INIT_PARAMS		int set = (*setp >> 3) & CURRENT_MASK; \
				int ann = (*setp >> 3) & ~CURRENT_MASK
#define UPDATE_PARAMS		*setp = (set | ann) << 3
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>


/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>
Commit	Line	Data
c0d99958 UD	1	/* Conversion module for ISO-2022-CN-EXT.
	2	Copyright (C) 2000 Free Software Foundation, Inc.
	3	This file is part of the GNU C Library.
	4	Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Library General Public License as
	8	published by the Free Software Foundation; either version 2 of the
	9	License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Library General Public License for more details.
	15
	16	You should have received a copy of the GNU Library General Public
	17	License along with the GNU C Library; see the file COPYING.LIB. If not,
	18	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
	21	#include <dlfcn.h>
	22	#include <gconv.h>
	23	#include <stdint.h>
	24	#include <string.h>
	25	#include "gb2312.h"
	26	#include "iso-ir-165.h"
755104ed	27	#include "cns11643.h"
c0d99958 UD	28	#include "cns11643l1.h"
	29	#include "cns11643l2.h"
	30
	31	#include <assert.h>
	32
	33	/* This makes obvious what everybody knows: 0x1b is the Esc character. */
	34	#define ESC 0x1b
	35
	36	/* We have single-byte shift-in and shift-out sequences, and the single
	37	shift sequences SS2 and SS3 which replaces the SS2/SS3 designation for
	38	the next two bytes. */
	39	#define SI 0x0f
	40	#define SO 0x0e
	41	#define SS2_0 ESC
	42	#define SS2_1 0x4e
	43	#define SS3_0 ESC
	44	#define SS3_1 0x4f
	45
	46	/* Definitions used in the body of the `gconv' function. */
	47	#define CHARSET_NAME "ISO-2022-CN-EXT//"
	48	#define DEFINE_INIT 1
	49	#define DEFINE_FINI 1
	50	#define FROM_LOOP from_iso2022cn_ext_loop
	51	#define TO_LOOP to_iso2022cn_ext_loop
	52	#define MIN_NEEDED_FROM 1
	53	#define MAX_NEEDED_FROM 4
	54	#define MIN_NEEDED_TO 4
	55	#define MAX_NEEDED_TO 4
	56	#define PREPARE_LOOP \
	57	int save_set; \
	58	int *setp = &data->__statep->__count;
	59	#define EXTRA_LOOP_ARGS , setp
	60
	61
	62	/* The charsets GB/T 12345-90, GB 7589-87, GB/T 13131-9X, GB 7590-87,
	63	and GB/T 13132-9X are not registered to the best of my knowledge and
	64	therefore have no escape sequence assigned. We cannot handle them
	65	for this reason. Tell the implementation about this. */
	66	#define X12345 '\0'
	67	#define X7589 '\0'
	68	#define X13131 '\0'
	69	#define X7590 '\0'
	70	#define X13132 '\0'
	71
	72
	73	/* The COUNT element of the state keeps track of the currently selected
	74	character set. The possible values are: */
	75	enum
	76	{
	77	ASCII_set = 0,
	78	GB2312_set,
	79	GB12345_set,
	80	CNS11643_1_set,
	81	ISO_IR_165_set,
	82	SO_mask = 7,
	83
755104ed UD	84	GB7589_set = 1 << 3,
	85	GB13131_set = 2 << 3,
	86	CNS11643_2_set = 3 << 3,
	87	SS2_mask = 3 << 3,
c0d99958	88
755104ed UD	89	GB7590_set = 1 << 5,
	90	GB13132_set = 2 << 5,
	91	CNS11643_3_set = 3 << 5,
	92	CNS11643_4_set = 4 << 5,
	93	CNS11643_5_set = 5 << 5,
	94	CNS11643_6_set = 6 << 5,
	95	CNS11643_7_set = 7 << 5,
	96	SS3_mask = 7 << 5,
c0d99958 UD	97
	98	#define CURRENT_MASK (SO_mask \| SS2_mask \| SS3_mask)
	99
755104ed UD	100	GB2312_ann = 1 << 8,
	101	GB12345_ann = 2 << 8,
	102	CNS11643_1_ann = 3 << 8,
	103	ISO_IR_165_ann = 4 << 8,
	104	SO_ann = 7 << 8,
c0d99958	105
755104ed UD	106	GB7589_ann = 1 << 11,
	107	GB13131_ann = 2 << 11,
	108	CNS11643_2_ann = 3 << 11,
	109	SS2_ann = 3 << 11,
c0d99958	110
755104ed UD	111	GB7590_ann = 1 << 13,
	112	GB13132_ann = 2 << 13,
	113	CNS11643_3_ann = 3 << 13,
	114	CNS11643_4_ann = 4 << 13,
	115	CNS11643_5_ann = 5 << 13,
	116	CNS11643_6_ann = 6 << 13,
	117	CNS11643_7_ann = 7 << 13,
	118	SS3_ann = 7 << 13
c0d99958 UD	119	};
	120
	121
	122	/* Since this is a stateful encoding we have to provide code which resets
	123	the output state to the initial state. This has to be done during the
	124	flushing. */
	125	#define EMIT_SHIFT_TO_INIT \
655de5fd	126	if (data->__statep->__count >> 3 != ASCII_set) \
c0d99958 UD	127	{ \
	128	if (FROM_DIRECTION) \
	129	/* It's easy, we don't have to emit anything, we just reset the \
	130	state for the input. */ \
655de5fd	131	data->__statep->__count = ASCII_set << 3; \
c0d99958 UD	132	else \
	133	{ \
	134	unsigned char *outbuf = data->__outbuf; \
	135	\
	136	/* We are not in the initial state. To switch back we have \
	137	to emit `SI'. */ \
	138	if (outbuf == data->__outbufend) \
	139	/* We don't have enough room in the output buffer. */ \
	140	status = __GCONV_FULL_OUTPUT; \
	141	else \
	142	{ \
	143	/* Write out the shift sequence. */ \
	144	*outbuf++ = SI; \
	145	if (data->__flags & __GCONV_IS_LAST) \
	146	*irreversible += 1; \
	147	data->__outbuf = outbuf; \
655de5fd	148	data->__statep->__count = ASCII_set << 3; \
c0d99958 UD	149	} \
	150	} \
	151	}
	152
	153
	154	/* Since we might have to reset input pointer we must be able to save
	155	and retore the state. */
	156	#define SAVE_RESET_STATE(Save) \
	157	if (Save) \
	158	save_set = *setp; \
	159	else \
	160	*setp = save_set
	161
	162
	163	/* First define the conversion function from ISO-2022-CN to UCS4. */
	164	#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
	165	#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
	166	#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
	167	#define LOOPFCT FROM_LOOP
	168	#define BODY \
	169	{ \
	170	uint32_t ch = *inptr; \
	171	\
	172	/* This is a 7bit character set, disallow all 8bit characters. */ \
	173	if (ch > 0x7f) \
	174	{ \
	175	if (! ignore_errors_p ()) \
	176	{ \
	177	result = __GCONV_ILLEGAL_INPUT; \
	178	break; \
	179	} \
	180	++inptr; \
	181	++*irreversible; \
	182	continue; \
	183	} \
	184	\
	185	/* Recognize escape sequences. */ \
	186	if (ch == ESC) \
	187	{ \
	188	/* There are three kinds of escape sequences we have to handle: \
	189	- those announcing the use of GB and CNS characters on the \
	190	line; we can simply ignore them \
	191	- the initial byte of the SS2 sequence. \
	192	- the initial byte of the SS3 sequence. \
	193	*/ \
755104ed	194	if (inptr + 2 > inend \
c0d99958	195	\|\| (inptr[1] == '$' \
755104ed UD	196	&& (inptr + 3 > inend \
	197	\|\| (inptr[2] == ')' && inptr + 4 > inend) \
	198	\|\| (inptr[2] == '*' && inptr + 4 > inend) \
	199	\|\| (inptr[2] == '+' && inptr + 4 > inend))) \
	200	\|\| (inptr[1] == SS2_1 && inptr + 4 > inend) \
	201	\|\| (inptr[1] == SS3_1 && inptr + 4 > inend)) \
c0d99958	202	{ \
755104ed	203	result = __GCONV_INCOMPLETE_INPUT; \
c0d99958 UD	204	break; \
	205	} \
	206	if (inptr[1] == '$' \
	207	&& ((inptr[2] == ')' \
	208	&& (inptr[3] == 'A' \
	209	\|\| (X12345 != '\0' && inptr[3] == X12345) \
	210	\|\| inptr[3] == 'E' \|\| inptr[3] == 'G')) \
	211	\|\| (inptr[2] == '*' \
	212	&& ((X7589 != '\0' && inptr[3] == X7589) \
	213	\|\| (X13131 != '\0' && inptr[3] == X13131) \
	214	\|\| inptr[3] == 'H')) \
	215	\|\| (inptr[2] == '+' \
	216	&& ((X7590 != '\0' && inptr[3] == X7590) \
	217	\|\| (X13132 != '\0' && inptr[3] == X13132) \
	218	\|\| inptr[3] == 'I' \|\| inptr[3] == 'J' \
	219	\|\| inptr[3] == 'K' \|\| inptr[3] == 'L' \
	220	\|\| inptr[3] == 'M')))) \
	221	{ \
	222	/* OK, we accept those character sets. */ \
	223	if (inptr[3] == 'A') \
	224	ann = (ann & ~SO_ann) \| GB2312_ann; \
	225	else if (inptr[3] == 'G') \
	226	ann = (ann & ~SO_ann) \| CNS11643_1_ann; \
	227	else if (inptr[3] == 'E') \
	228	ann = (ann & ~SO_ann) \| ISO_IR_165_ann; \
	229	else if (X12345 != '\0' && inptr[3] == X12345) \
	230	ann = (ann & ~SO_ann) \| GB12345_ann; \
	231	else if (inptr[3] == 'H') \
	232	ann = (ann & ~SS2_ann) \| CNS11643_2_ann; \
	233	else if (X7589 != '\0' && inptr[3] == X7589) \
	234	ann = (ann & ~SS2_ann) \| GB7589_ann; \
	235	else if (X13131 != '\0' && inptr[3] == X13131) \
	236	ann = (ann & ~SS2_ann) \| GB13131_ann; \
	237	else if (inptr[3] == 'I') \
	238	ann = (ann & ~SS3_ann) \| CNS11643_3_ann; \
	239	else if (inptr[3] == 'J') \
	240	ann = (ann & ~SS3_ann) \| CNS11643_4_ann; \
	241	else if (inptr[3] == 'K') \
	242	ann = (ann & ~SS3_ann) \| CNS11643_5_ann; \
	243	else if (inptr[3] == 'L') \
	244	ann = (ann & ~SS3_ann) \| CNS11643_6_ann; \
	245	else if (inptr[3] == 'M') \
	246	ann = (ann & ~SS3_ann) \| CNS11643_7_ann; \
	247	else if (X7590 != '\0' && inptr[3] == X7590) \
	248	ann = (ann & ~SS3_ann) \| GB7590_ann; \
	249	else if (X13132 != '\0' && inptr[3] == X13132) \
	250	ann = (ann & ~SS3_ann) \| GB13132_ann; \
	251	inptr += 4; \
	252	continue; \
	253	} \
	254	} \
	255	else if (ch == SO) \
	256	{ \
	257	/* Switch to use GB2312, GB12345, CNS 11643 plane 1, or ISO-IR-165, \
	258	depending on which S0 designation came last. The only problem \
	259	is what to do with faulty input files where no designator came. \
	260	XXX For now I'll default to use GB2312. If this is not the \
	261	best behavior (e.g., we should flag an error) let me know. */ \
	262	++inptr; \
	263	switch (ann & SO_ann) \
	264	{ \
	265	case GB2312_ann: \
	266	set = GB2312_set; \
	267	break; \
268	case GB12345_ann: \
269	set = GB12345_set; \
270	break; \
271	case CNS11643_1_ann: \
272	set = CNS11643_1_set; \
273	break; \
274	default: \
275	assert ((ann & SO_ann) == ISO_IR_165_ann); \
276	set = ISO_IR_165_set; \
277	break; \
278	} \
279	continue; \
280	} \
281	else if (ch == SI) \
282	{ \
283	/* Switch to use ASCII. */ \
284	++inptr; \
285	set = ASCII_set; \
286	continue; \
287	} \
288	\
755104ed	289	if (ch == ESC && inptr[1] == SS2_1) \
c0d99958 UD	290	{ \
	291	/* This is a character from CNS 11643 plane 2. \
	292	XXX We could test here whether the use of this character \
	293	set was announced. \
	294	XXX Current GB7589 and GB13131 are not supported. */ \
c0d99958 UD	295	inptr += 2; \
	296	ch = cns11643l2_to_ucs4 (&inptr, 2, 0); \
	297	if (ch == __UNKNOWN_10646_CHAR) \
	298	{ \
	299	if (! ignore_errors_p ()) \
	300	{ \
	301	inptr -= 2; \
	302	result = __GCONV_ILLEGAL_INPUT; \
	303	break; \
	304	} \
755104ed	305	inptr += 2; \
c0d99958 UD	306	++*irreversible; \
	307	continue; \
	308	} \
	309	} \
755104ed	310	/* Note that we can assume here that at least 4 bytes are available if \
c0d99958 UD	311	the first byte is ESC since otherwise the first if would have been \
	312	true. */ \
	313	else if (ch == ESC && inptr[1] == SS3_1) \
	314	{ \
	315	/* This is a character from CNS 11643 plane 3 or higher. \
755104ed UD	316	XXX Currently GB7590 and GB13132 are not supported. */ \
	317	char buf[3]; \
	318	const char *tmp = buf; \
	319	\
	320	buf[1] = inptr[2]; \
	321	buf[2] = inptr[3]; \
	322	switch (ann & SS3_ann) \
c0d99958	323	{ \
755104ed UD	324	case CNS11643_3_ann: \
	325	/* CNS 11643 plane 3 is part of the old CNS 11643 plane 14. */ \
	326	if (buf[1] < 0x62 \|\| (buf[1] == 0x62 && buf[2] <= 0x45)) \
	327	{ \
	328	buf[0] = 0x2e; \
	329	ch = cns11643_to_ucs4 (&tmp, 3, 0); \
	330	} \
	331	else \
	332	ch = __UNKNOWN_10646_CHAR; \
	333	break; \
	334	default: \
	335	/* XXX Currently planes 4 to 7 are not supported. */ \
	336	ch = __UNKNOWN_10646_CHAR; \
c0d99958 UD	337	break; \
c0d99958 UD	338	} \
c0d99958 UD	339	if (ch == __UNKNOWN_10646_CHAR) \
	340	{ \
	341	if (! ignore_errors_p ()) \
	342	{ \
c0d99958 UD	343	result = __GCONV_ILLEGAL_INPUT; \
	344	break; \
	345	} \
755104ed	346	inptr += 4; \
c0d99958 UD	347	++*irreversible; \
	348	continue; \
	349	} \
755104ed UD	350	assert (tmp == buf + 3); \
755104ed UD	351	inptr += 4; \
c0d99958 UD	352	} \
	353	else if (set == ASCII_set) \
	354	{ \
	355	/* Almost done, just advance the input pointer. */ \
	356	++inptr; \
	357	} \
	358	else \
	359	{ \
	360	/* That's pretty easy, we have a dedicated functions for this. */ \
	361	if (inend - inptr < 2) \
	362	{ \
	363	result = __GCONV_INCOMPLETE_INPUT; \
	364	break; \
	365	} \
	366	if (set == GB2312_set) \
	367	ch = gb2312_to_ucs4 (&inptr, inend - inptr, 0); \
	368	else if (set == ISO_IR_165_set) \
	369	ch = isoir165_to_ucs4 (&inptr, inend - inptr); \
	370	else \
	371	{ \
	372	assert (set == CNS11643_1_set); \
	373	ch = cns11643l1_to_ucs4 (&inptr, inend - inptr, 0); \
	374	} \
	375	\
	376	if (ch == 0) \
	377	{ \
755104ed	378	result = __GCONV_INCOMPLETE_INPUT; \
c0d99958 UD	379	break; \
	380	} \
	381	else if (ch == __UNKNOWN_10646_CHAR) \
	382	{ \
	383	if (! ignore_errors_p ()) \
	384	{ \
	385	result = __GCONV_ILLEGAL_INPUT; \
	386	break; \
	387	} \
	388	inptr += 2; \
	389	++*irreversible; \
	390	continue; \
	391	} \
	392	} \
	393	\
	394	((uint32_t ) outptr)++ = ch; \
	395	}
	396	#define EXTRA_LOOP_DECLS , int *setp
655de5fd UD	397	#define INIT_PARAMS int set = (*setp >> 3) & CURRENT_MASK; \
	398	int ann = (*setp >> 3) & ~CURRENT_MASK
	399	#define UPDATE_PARAMS *setp = (set \| ann) << 3
c0d99958 UD	400	#define LOOP_NEED_FLAGS
	401	#include <iconv/loop.c>
	402
	403
	404	/* Next, define the other direction. */
	405	#define MIN_NEEDED_INPUT MIN_NEEDED_TO
	406	#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
	407	#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
	408	#define LOOPFCT TO_LOOP
	409	#define BODY \
	410	{ \
	411	uint32_t ch; \
	412	size_t written = 0; \
	413	\
8c0b7170	414	ch = ((const uint32_t ) inptr); \
c0d99958 UD	415	\
	416	/* First see whether we can write the character using the currently \
	417	selected character set. */ \
	418	if (ch < 0x80) \
	419	{ \
	420	if (set != ASCII_set) \
	421	{ \
	422	*outptr++ = SI; \
	423	set = ASCII_set; \
	424	if (outptr == outend) \
	425	{ \
	426	result = __GCONV_FULL_OUTPUT; \
	427	break; \
	428	} \
	429	} \
	430	\
	431	*outptr++ = ch; \
	432	written = 1; \
	433	\
	434	/* At the end of the line we have to clear the `ann' flags since \
	435	every line must contain this information again. */ \
	436	if (ch == L'\n') \
	437	ann = 0; \
	438	} \
	439	else \
	440	{ \
	441	char buf[2]; \
	442	int used; \
	443	\
755104ed UD	444	if (set == GB2312_set \|\| ((ann & SO_ann) != CNS11643_1_ann \
755104ed UD	445	&& (ann & SO_ann) != ISO_IR_165_ann)) \
c0d99958 UD	446	{ \
	447	written = ucs4_to_gb2312 (ch, buf, 2); \
	448	used = GB2312_set; \
	449	} \
755104ed	450	else if (set == ISO_IR_165_set \|\| (ann & SO_ann) == ISO_IR_165_set) \
c0d99958	451	{ \
755104ed UD	452	written = ucs4_to_isoir165 (ch, buf, 2); \
755104ed UD	453	used = ISO_IR_165_set; \
c0d99958 UD	454	} \
	455	else \
	456	{ \
	457	written = ucs4_to_cns11643l1 (ch, buf, 2); \
	458	used = CNS11643_1_set; \
	459	} \
	460	\
	461	if (written == __UNKNOWN_10646_CHAR) \
	462	{ \
	463	/* Cannot convert it using the currently selected SO set. \
	464	Next try the SS2 set. */ \
	465	written = ucs4_to_cns11643l2 (ch, buf, 2); \
	466	if (written != __UNKNOWN_10646_CHAR) \
	467	/* Yep, that worked. */ \
	468	used = CNS11643_2_set; \
	469	else \
	470	{ \
755104ed	471	char tmpbuf[3]; \
c0d99958	472	\
755104ed	473	switch (0) \
c0d99958	474	{ \
755104ed UD	475	default: \
	476	/* Well, see whether we have to change the SO set. */ \
	477	\
	478	if (used != GB2312_set) \
	479	{ \
	480	written = ucs4_to_gb2312 (ch, buf, 2); \
	481	if (written != __UNKNOWN_10646_CHAR) \
	482	{ \
	483	used = GB2312_set; \
	484	break; \
	485	} \
	486	} \
	487	\
	488	if (used != ISO_IR_165_set) \
	489	{ \
	490	written = ucs4_to_isoir165 (ch, buf, 2); \
	491	if (written != __UNKNOWN_10646_CHAR) \
	492	{ \
	493	used = ISO_IR_165_set; \
	494	break; \
	495	} \
	496	} \
	497	\
	498	if (used != CNS11643_1_set) \
	499	{ \
	500	written = ucs4_to_cns11643l1 (ch, buf, 2); \
	501	if (written != __UNKNOWN_10646_CHAR) \
	502	{ \
	503	used = CNS11643_1_set; \
	504	break; \
	505	} \
	506	} \
	507	\
	508	written = ucs4_to_cns11643 (ch, tmpbuf, 3); \
	509	if (written == 3 && tmpbuf[0] != 1 && tmpbuf[0] != 2) \
	510	{ \
	511	buf[0] = tmpbuf[1]; \
	512	buf[1] = tmpbuf[2]; \
	513	written = 2; \
	514	/* CNS 11643 plane 3 is part of the old CNS 11643 \
	515	plane 14. \
	516	XXX Currently planes 4 to 7 are not supported. */ \
	517	if (tmpbuf[0] == 14 \
	518	&& (tmpbuf[1] < 0x62 \
	519	\|\| (tmpbuf[1] == 0x62 && tmpbuf[2] <= 0x45))) \
	520	{ \
	521	used = CNS11643_3_set; \
	522	break; \
	523	} \
	524	} \
	525	\
c0d99958	526	/* Even this does not work. Error. */ \
755104ed UD	527	used = ASCII_set; \
	528	} \
	529	if (used == ASCII_set) \
	530	{ \
c0d99958 UD	531	STANDARD_ERR_HANDLER (4); \
	532	} \
	533	} \
	534	} \
	535	assert (written == 2); \
	536	\
	537	/* See whether we have to emit an escape sequence. */ \
	538	if (set != used) \
	539	{ \
	540	/* First see whether we announced that we use this \
	541	character set. */ \
755104ed	542	if ((used & SO_mask) != 0 && (ann & SO_ann) != (used << 8)) \
c0d99958 UD	543	{ \
	544	const char *escseq; \
	545	\
	546	if (outptr + 4 > outend) \
	547	{ \
	548	result = __GCONV_FULL_OUTPUT; \
	549	break; \
	550	} \
	551	\
	552	assert (used >= 1 && used <= 4); \
755104ed UD	553	escseq = ")A\0\0)G)E" + (used - 1) * 2; \
	554	*outptr++ = ESC; \
	555	*outptr++ = '$'; \
	556	outptr++ = escseq++; \
	557	outptr++ = escseq++; \
	558	\
	559	ann = (ann & ~SO_ann) \| (used << 8); \
	560	} \
	561	else if ((used & SS2_mask) != 0 && (ann & SS2_ann) != (used << 8))\
	562	{ \
	563	const char *escseq; \
	564	\
	565	assert (used == CNS11643_2_set); /* XXX */ \
	566	escseq = "*H"; \
	567	*outptr++ = ESC; \
	568	*outptr++ = '$'; \
c0d99958 UD	569	outptr++ = escseq++; \
c0d99958 UD	570	outptr++ = escseq++; \
755104ed UD	571	\
	572	ann = (ann & ~SS2_ann) \| (used << 8); \
	573	} \
	574	else if ((used & SS3_mask) != 0 && (ann & SS3_ann) != (used << 8))\
	575	{ \
	576	const char *escseq; \
	577	\
	578	assert ((used >> 5) >= 3 && (used >> 5) <= 7); \
	579	escseq = "+I+J+K+L+M" + ((used >> 5) - 3) * 2; \
	580	*outptr++ = ESC; \
	581	*outptr++ = '$'; \
c0d99958 UD	582	outptr++ = escseq++; \
	583	outptr++ = escseq++; \
	584	\
755104ed	585	ann = (ann & ~SS3_ann) \| (used << 8); \
c0d99958 UD	586	} \
	587	\
	588	if (used == CNS11643_2_set) \
	589	{ \
	590	if (outptr + 2 > outend) \
	591	{ \
	592	result = __GCONV_FULL_OUTPUT; \
	593	break; \
	594	} \
	595	*outptr++ = SS2_0; \
	596	*outptr++ = SS2_1; \
	597	} \
755104ed UD	598	else if (used >= CNS11643_3_set && used <= CNS11643_7_set) \
	599	{ \
	600	if (outptr + 2 > outend) \
	601	{ \
	602	result = __GCONV_FULL_OUTPUT; \
	603	break; \
	604	} \
	605	*outptr++ = SS3_0; \
	606	*outptr++ = SS3_1; \
	607	} \
c0d99958 UD	608	else \
	609	{ \
	610	/* We only have to emit something if currently ASCII is \
	611	selected. Otherwise we are switching within the \
	612	SO charset. */ \
	613	if (set == ASCII_set) \
	614	{ \
	615	if (outptr + 1 > outend) \
	616	{ \
	617	result = __GCONV_FULL_OUTPUT; \
	618	break; \
	619	} \
	620	*outptr++ = SO; \
	621	} \
	622	} \
	623	\
	624	/* Always test the length here since we have used up all the \
	625	guaranteed output buffer slots. */ \
	626	if (outptr + 2 > outend) \
	627	{ \
	628	result = __GCONV_FULL_OUTPUT; \
	629	break; \
	630	} \
	631	} \
	632	else if (outptr + 2 > outend) \
	633	{ \
	634	result = __GCONV_FULL_OUTPUT; \
	635	break; \
	636	} \
	637	\
	638	*outptr++ = buf[0]; \
	639	*outptr++ = buf[1]; \
755104ed	640	set = used; \
c0d99958 UD	641	} \
	642	\
	643	/* Now that we wrote the output increment the input pointer. */ \
	644	inptr += 4; \
	645	}
	646	#define EXTRA_LOOP_DECLS , int *setp
655de5fd UD	647	#define INIT_PARAMS int set = (*setp >> 3) & CURRENT_MASK; \
	648	int ann = (*setp >> 3) & ~CURRENT_MASK
	649	#define UPDATE_PARAMS *setp = (set \| ann) << 3
c0d99958 UD	650	#define LOOP_NEED_FLAGS
	651	#include <iconv/loop.c>
	652
	653
	654	/* Now define the toplevel functions. */
	655	#include <iconv/skeleton.c>