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

/* Conversion module for ISO-2022-CN-EXT.
   Copyright (C) 2000-2013 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <dlfcn.h>
#include <gconv.h>
#include <stdint.h>
#include <stdlib.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 FROM_LOOP_MIN_NEEDED_FROM	1
#define FROM_LOOP_MAX_NEEDED_FROM	4
#define FROM_LOOP_MIN_NEEDED_TO		4
#define FROM_LOOP_MAX_NEEDED_TO		4
#define TO_LOOP_MIN_NEEDED_FROM		4
#define TO_LOOP_MAX_NEEDED_FROM		4
#define TO_LOOP_MIN_NEEDED_TO		1
#define TO_LOOP_MAX_NEEDED_TO		6
#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								      \
	{								      \
	  /* We are not in the initial state.  To switch back we have	      \
	     to emit `SI'.  */						      \
	  if (__builtin_expect (outbuf == outend, 0))			      \
	    /* 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->__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	FROM_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	FROM_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	FROM_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	FROM_LOOP_MAX_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)							      \
      STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
									      \
    /* 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;							      \
	if ((ann & SO_ann) != 0)					      \
	  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;							      \
	    case ISO_IR_165_ann:					      \
	      set = ISO_IR_165_set;					      \
	      break;							      \
	    default:							      \
	      abort ();							      \
	    }								      \
	else								      \
	  {								      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
	  }								      \
	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 Currently GB7589 and GB13131 are not supported.  */	      \
	inptr += 2;							      \
	ch = cns11643l2_to_ucs4 (&inptr, 2, 0);				      \
	if (ch == __UNKNOWN_10646_CHAR)					      \
	  STANDARD_FROM_LOOP_ERR_HANDLER (2);				      \
      }									      \
    /* 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.  */	      \
	unsigned char buf[3];						      \
	const unsigned char *tmp = buf;					      \
									      \
	buf[1] = inptr[2];						      \
	buf[2] = inptr[3];						      \
	switch (ann & SS3_ann)						      \
	  {								      \
	  case CNS11643_3_ann:						      \
	    buf[0] = 0x23;						      \
	    ch = cns11643_to_ucs4 (&tmp, 3, 0);				      \
	    break;							      \
	  case CNS11643_4_ann:						      \
	    buf[0] = 0x24;						      \
	    ch = cns11643_to_ucs4 (&tmp, 3, 0);				      \
	    break;							      \
	  case CNS11643_5_ann:						      \
	    buf[0] = 0x25;						      \
	    ch = cns11643_to_ucs4 (&tmp, 3, 0);				      \
	    break;							      \
	  case CNS11643_6_ann:						      \
	    buf[0] = 0x26;						      \
	    ch = cns11643_to_ucs4 (&tmp, 3, 0);				      \
	    break;							      \
	  case CNS11643_7_ann:						      \
	    buf[0] = 0x27;						      \
	    ch = cns11643_to_ucs4 (&tmp, 3, 0);				      \
	    break;							      \
	  default:							      \
	    /* XXX Currently GB7590 and GB13132 are not supported.  */	      \
	    ch = __UNKNOWN_10646_CHAR;					      \
	    break;							      \
	  }								      \
	if (ch == __UNKNOWN_10646_CHAR)					      \
	  {								      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (4);				      \
	  }								      \
	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)				      \
	  {								      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (2);				      \
	  }								      \
      }									      \
									      \
    *((uint32_t *) outptr) = ch;					      \
    outptr += sizeof (uint32_t);					      \
  }
#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	TO_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	TO_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	TO_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	TO_LOOP_MAX_NEEDED_TO
#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								      \
      {									      \
	unsigned 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							      \
	      {								      \
		unsigned 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] >= 3 && tmpbuf[0] <= 7)     \
		      {							      \
			buf[0] = tmpbuf[1];				      \
			buf[1] = tmpbuf[2];				      \
			switch (tmpbuf[0])				      \
			  {						      \
			  case 3:					      \
			    used = CNS11643_3_set;			      \
			    break;					      \
			  case 4:					      \
			    used = CNS11643_4_set;			      \
			    break;					      \
			  case 5:					      \
			    used = CNS11643_5_set;			      \
			    break;					      \
			  case 6:					      \
			    used = CNS11643_6_set;			      \
			    break;					      \
			  case 7:					      \
			    used = CNS11643_7_set;			      \
			    break;					      \
			  default:					      \
			    abort ();					      \
			  }						      \
			written = 2;					      \
			break;						      \
		      }							      \
									      \
		    /* XXX Currently GB7590 and GB13132 are not supported.  */\
									      \
		    /* Even this does not work.  Error.  */		      \
		    used = ASCII_set;					      \
		  }							      \
		if (used == ASCII_set)					      \
		  {							      \
		    UNICODE_TAG_HANDLER (ch, 4);			      \
		    STANDARD_TO_LOOP_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 REINIT_PARAMS		do					      \
				  {					      \
				    set = (*setp >> 3) & CURRENT_MASK;	      \
				    ann = (*setp >> 3) & ~CURRENT_MASK;	      \
				  }					      \
				while (0)
#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	1	/* Conversion module for ISO-2022-CN-EXT.
568035b7	2	Copyright (C) 2000-2013 Free Software Foundation, Inc.
c0d99958 UD	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
41bdb6e2 AJ	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
c0d99958 UD	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
41bdb6e2	14	Lesser General Public License for more details.
c0d99958	15
41bdb6e2	16	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
c0d99958 UD	19
	20	#include <dlfcn.h>
	21	#include <gconv.h>
	22	#include <stdint.h>
466dc74c	23	#include <stdlib.h>
c0d99958 UD	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
faaa6f62 UD	52	#define FROM_LOOP_MIN_NEEDED_FROM 1
	53	#define FROM_LOOP_MAX_NEEDED_FROM 4
	54	#define FROM_LOOP_MIN_NEEDED_TO 4
	55	#define FROM_LOOP_MAX_NEEDED_TO 4
	56	#define TO_LOOP_MIN_NEEDED_FROM 4
	57	#define TO_LOOP_MAX_NEEDED_FROM 4
	58	#define TO_LOOP_MIN_NEEDED_TO 1
	59	#define TO_LOOP_MAX_NEEDED_TO 6
c0d99958 UD	60	#define PREPARE_LOOP \
	61	int save_set; \
	62	int *setp = &data->__statep->__count;
	63	#define EXTRA_LOOP_ARGS , setp
	64
	65
	66	/* The charsets GB/T 12345-90, GB 7589-87, GB/T 13131-9X, GB 7590-87,
	67	and GB/T 13132-9X are not registered to the best of my knowledge and
	68	therefore have no escape sequence assigned. We cannot handle them
	69	for this reason. Tell the implementation about this. */
	70	#define X12345 '\0'
	71	#define X7589 '\0'
	72	#define X13131 '\0'
	73	#define X7590 '\0'
	74	#define X13132 '\0'
	75
	76
	77	/* The COUNT element of the state keeps track of the currently selected
	78	character set. The possible values are: */
	79	enum
	80	{
	81	ASCII_set = 0,
	82	GB2312_set,
	83	GB12345_set,
	84	CNS11643_1_set,
	85	ISO_IR_165_set,
	86	SO_mask = 7,
	87
755104ed UD	88	GB7589_set = 1 << 3,
	89	GB13131_set = 2 << 3,
	90	CNS11643_2_set = 3 << 3,
	91	SS2_mask = 3 << 3,
c0d99958	92
755104ed UD	93	GB7590_set = 1 << 5,
	94	GB13132_set = 2 << 5,
	95	CNS11643_3_set = 3 << 5,
	96	CNS11643_4_set = 4 << 5,
	97	CNS11643_5_set = 5 << 5,
	98	CNS11643_6_set = 6 << 5,
	99	CNS11643_7_set = 7 << 5,
	100	SS3_mask = 7 << 5,
c0d99958 UD	101
	102	#define CURRENT_MASK (SO_mask \| SS2_mask \| SS3_mask)
	103
755104ed UD	104	GB2312_ann = 1 << 8,
	105	GB12345_ann = 2 << 8,
	106	CNS11643_1_ann = 3 << 8,
	107	ISO_IR_165_ann = 4 << 8,
	108	SO_ann = 7 << 8,
c0d99958	109
755104ed UD	110	GB7589_ann = 1 << 11,
	111	GB13131_ann = 2 << 11,
	112	CNS11643_2_ann = 3 << 11,
	113	SS2_ann = 3 << 11,
c0d99958	114
755104ed UD	115	GB7590_ann = 1 << 13,
	116	GB13132_ann = 2 << 13,
	117	CNS11643_3_ann = 3 << 13,
	118	CNS11643_4_ann = 4 << 13,
	119	CNS11643_5_ann = 5 << 13,
	120	CNS11643_6_ann = 6 << 13,
	121	CNS11643_7_ann = 7 << 13,
	122	SS3_ann = 7 << 13
c0d99958 UD	123	};
	124
	125
	126	/* Since this is a stateful encoding we have to provide code which resets
	127	the output state to the initial state. This has to be done during the
	128	flushing. */
	129	#define EMIT_SHIFT_TO_INIT \
655de5fd	130	if (data->__statep->__count >> 3 != ASCII_set) \
c0d99958 UD	131	{ \
	132	if (FROM_DIRECTION) \
	133	/* It's easy, we don't have to emit anything, we just reset the \
	134	state for the input. */ \
655de5fd	135	data->__statep->__count = ASCII_set << 3; \
c0d99958 UD	136	else \
c0d99958 UD	137	{ \
c0d99958 UD	138	/* We are not in the initial state. To switch back we have \
c0d99958 UD	139	to emit `SI'. */ \
2373b30e	140	if (__builtin_expect (outbuf == outend, 0)) \
c0d99958 UD	141	/* We don't have enough room in the output buffer. */ \
	142	status = __GCONV_FULL_OUTPUT; \
	143	else \
	144	{ \
	145	/* Write out the shift sequence. */ \
	146	*outbuf++ = SI; \
	147	if (data->__flags & __GCONV_IS_LAST) \
	148	*irreversible += 1; \
655de5fd	149	data->__statep->__count = ASCII_set << 3; \
c0d99958 UD	150	} \
	151	} \
	152	}
	153
	154
	155	/* Since we might have to reset input pointer we must be able to save
	156	and retore the state. */
	157	#define SAVE_RESET_STATE(Save) \
	158	if (Save) \
	159	save_set = *setp; \
	160	else \
	161	*setp = save_set
	162
	163
	164	/* First define the conversion function from ISO-2022-CN to UCS4. */
faaa6f62 UD	165	#define MIN_NEEDED_INPUT FROM_LOOP_MIN_NEEDED_FROM
	166	#define MAX_NEEDED_INPUT FROM_LOOP_MAX_NEEDED_FROM
	167	#define MIN_NEEDED_OUTPUT FROM_LOOP_MIN_NEEDED_TO
	168	#define MAX_NEEDED_OUTPUT FROM_LOOP_MAX_NEEDED_TO
c0d99958 UD	169	#define LOOPFCT FROM_LOOP
	170	#define BODY \
	171	{ \
	172	uint32_t ch = *inptr; \
	173	\
	174	/* This is a 7bit character set, disallow all 8bit characters. */ \
	175	if (ch > 0x7f) \
e438a468	176	STANDARD_FROM_LOOP_ERR_HANDLER (1); \
c0d99958 UD	177	\
	178	/* Recognize escape sequences. */ \
	179	if (ch == ESC) \
	180	{ \
	181	/* There are three kinds of escape sequences we have to handle: \
	182	- those announcing the use of GB and CNS characters on the \
	183	line; we can simply ignore them \
	184	- the initial byte of the SS2 sequence. \
	185	- the initial byte of the SS3 sequence. \
	186	*/ \
755104ed	187	if (inptr + 2 > inend \
c0d99958	188	\|\| (inptr[1] == '$' \
755104ed UD	189	&& (inptr + 3 > inend \
	190	\|\| (inptr[2] == ')' && inptr + 4 > inend) \
	191	\|\| (inptr[2] == '*' && inptr + 4 > inend) \
	192	\|\| (inptr[2] == '+' && inptr + 4 > inend))) \
	193	\|\| (inptr[1] == SS2_1 && inptr + 4 > inend) \
	194	\|\| (inptr[1] == SS3_1 && inptr + 4 > inend)) \
c0d99958	195	{ \
755104ed	196	result = __GCONV_INCOMPLETE_INPUT; \
c0d99958 UD	197	break; \
	198	} \
	199	if (inptr[1] == '$' \
	200	&& ((inptr[2] == ')' \
	201	&& (inptr[3] == 'A' \
	202	\|\| (X12345 != '\0' && inptr[3] == X12345) \
	203	\|\| inptr[3] == 'E' \|\| inptr[3] == 'G')) \
	204	\|\| (inptr[2] == '*' \
	205	&& ((X7589 != '\0' && inptr[3] == X7589) \
	206	\|\| (X13131 != '\0' && inptr[3] == X13131) \
	207	\|\| inptr[3] == 'H')) \
	208	\|\| (inptr[2] == '+' \
	209	&& ((X7590 != '\0' && inptr[3] == X7590) \
	210	\|\| (X13132 != '\0' && inptr[3] == X13132) \
	211	\|\| inptr[3] == 'I' \|\| inptr[3] == 'J' \
	212	\|\| inptr[3] == 'K' \|\| inptr[3] == 'L' \
	213	\|\| inptr[3] == 'M')))) \
	214	{ \
	215	/* OK, we accept those character sets. */ \
	216	if (inptr[3] == 'A') \
	217	ann = (ann & ~SO_ann) \| GB2312_ann; \
	218	else if (inptr[3] == 'G') \
	219	ann = (ann & ~SO_ann) \| CNS11643_1_ann; \
	220	else if (inptr[3] == 'E') \
	221	ann = (ann & ~SO_ann) \| ISO_IR_165_ann; \
	222	else if (X12345 != '\0' && inptr[3] == X12345) \
	223	ann = (ann & ~SO_ann) \| GB12345_ann; \
	224	else if (inptr[3] == 'H') \
	225	ann = (ann & ~SS2_ann) \| CNS11643_2_ann; \
	226	else if (X7589 != '\0' && inptr[3] == X7589) \
	227	ann = (ann & ~SS2_ann) \| GB7589_ann; \
	228	else if (X13131 != '\0' && inptr[3] == X13131) \
	229	ann = (ann & ~SS2_ann) \| GB13131_ann; \
	230	else if (inptr[3] == 'I') \
	231	ann = (ann & ~SS3_ann) \| CNS11643_3_ann; \
	232	else if (inptr[3] == 'J') \
	233	ann = (ann & ~SS3_ann) \| CNS11643_4_ann; \
	234	else if (inptr[3] == 'K') \
	235	ann = (ann & ~SS3_ann) \| CNS11643_5_ann; \
	236	else if (inptr[3] == 'L') \
	237	ann = (ann & ~SS3_ann) \| CNS11643_6_ann; \
	238	else if (inptr[3] == 'M') \
	239	ann = (ann & ~SS3_ann) \| CNS11643_7_ann; \
	240	else if (X7590 != '\0' && inptr[3] == X7590) \
	241	ann = (ann & ~SS3_ann) \| GB7590_ann; \
	242	else if (X13132 != '\0' && inptr[3] == X13132) \
	243	ann = (ann & ~SS3_ann) \| GB13132_ann; \
	244	inptr += 4; \
	245	continue; \
	246	} \
	247	} \
	248	else if (ch == SO) \
	249	{ \
	250	/* Switch to use GB2312, GB12345, CNS 11643 plane 1, or ISO-IR-165, \
	251	depending on which S0 designation came last. The only problem \
	252	is what to do with faulty input files where no designator came. \
	253	XXX For now I'll default to use GB2312. If this is not the \
	254	best behavior (e.g., we should flag an error) let me know. */ \
	255	++inptr; \
304d7abf UD	256	if ((ann & SO_ann) != 0) \
	257	switch (ann & SO_ann) \
	258	{ \
	259	case GB2312_ann: \
	260	set = GB2312_set; \
	261	break; \
	262	case GB12345_ann: \
	263	set = GB12345_set; \
	264	break; \
	265	case CNS11643_1_ann: \
	266	set = CNS11643_1_set; \
	267	break; \
	268	case ISO_IR_165_ann: \
	269	set = ISO_IR_165_set; \
	270	break; \
	271	default: \
	272	abort (); \
	273	} \
	274	else \
c0d99958	275	{ \
e438a468	276	STANDARD_FROM_LOOP_ERR_HANDLER (1); \
c0d99958 UD	277	} \
	278	continue; \
	279	} \
	280	else if (ch == SI) \
	281	{ \
	282	/* Switch to use ASCII. */ \
	283	++inptr; \
	284	set = ASCII_set; \
	285	continue; \
	286	} \
	287	\
755104ed	288	if (ch == ESC && inptr[1] == SS2_1) \
c0d99958 UD	289	{ \
	290	/* This is a character from CNS 11643 plane 2. \
	291	XXX We could test here whether the use of this character \
	292	set was announced. \
289ac9dd	293	XXX Currently GB7589 and GB13131 are not supported. */ \
c0d99958 UD	294	inptr += 2; \
	295	ch = cns11643l2_to_ucs4 (&inptr, 2, 0); \
	296	if (ch == __UNKNOWN_10646_CHAR) \
e438a468	297	STANDARD_FROM_LOOP_ERR_HANDLER (2); \
c0d99958	298	} \
755104ed	299	/* Note that we can assume here that at least 4 bytes are available if \
c0d99958 UD	300	the first byte is ESC since otherwise the first if would have been \
	301	true. */ \
	302	else if (ch == ESC && inptr[1] == SS3_1) \
	303	{ \
	304	/* This is a character from CNS 11643 plane 3 or higher. \
755104ed	305	XXX Currently GB7590 and GB13132 are not supported. */ \
085a4412 UD	306	unsigned char buf[3]; \
085a4412 UD	307	const unsigned char *tmp = buf; \
755104ed UD	308	\
	309	buf[1] = inptr[2]; \
	310	buf[2] = inptr[3]; \
	311	switch (ann & SS3_ann) \
c0d99958	312	{ \
755104ed	313	case CNS11643_3_ann: \
289ac9dd UD	314	buf[0] = 0x23; \
	315	ch = cns11643_to_ucs4 (&tmp, 3, 0); \
	316	break; \
	317	case CNS11643_4_ann: \
	318	buf[0] = 0x24; \
	319	ch = cns11643_to_ucs4 (&tmp, 3, 0); \
	320	break; \
	321	case CNS11643_5_ann: \
	322	buf[0] = 0x25; \
	323	ch = cns11643_to_ucs4 (&tmp, 3, 0); \
	324	break; \
	325	case CNS11643_6_ann: \
	326	buf[0] = 0x26; \
	327	ch = cns11643_to_ucs4 (&tmp, 3, 0); \
	328	break; \
	329	case CNS11643_7_ann: \
	330	buf[0] = 0x27; \
	331	ch = cns11643_to_ucs4 (&tmp, 3, 0); \
755104ed UD	332	break; \
755104ed UD	333	default: \
289ac9dd	334	/* XXX Currently GB7590 and GB13132 are not supported. */ \
755104ed	335	ch = __UNKNOWN_10646_CHAR; \
c0d99958 UD	336	break; \
c0d99958 UD	337	} \
c0d99958 UD	338	if (ch == __UNKNOWN_10646_CHAR) \
c0d99958 UD	339	{ \
e438a468	340	STANDARD_FROM_LOOP_ERR_HANDLER (4); \
c0d99958	341	} \
755104ed UD	342	assert (tmp == buf + 3); \
755104ed UD	343	inptr += 4; \
c0d99958 UD	344	} \
	345	else if (set == ASCII_set) \
	346	{ \
	347	/* Almost done, just advance the input pointer. */ \
	348	++inptr; \
	349	} \
	350	else \
	351	{ \
	352	/* That's pretty easy, we have a dedicated functions for this. */ \
	353	if (inend - inptr < 2) \
	354	{ \
	355	result = __GCONV_INCOMPLETE_INPUT; \
	356	break; \
	357	} \
	358	if (set == GB2312_set) \
	359	ch = gb2312_to_ucs4 (&inptr, inend - inptr, 0); \
	360	else if (set == ISO_IR_165_set) \
	361	ch = isoir165_to_ucs4 (&inptr, inend - inptr); \
	362	else \
	363	{ \
	364	assert (set == CNS11643_1_set); \
	365	ch = cns11643l1_to_ucs4 (&inptr, inend - inptr, 0); \
	366	} \
	367	\
	368	if (ch == 0) \
	369	{ \
755104ed	370	result = __GCONV_INCOMPLETE_INPUT; \
c0d99958 UD	371	break; \
	372	} \
	373	else if (ch == __UNKNOWN_10646_CHAR) \
	374	{ \
e438a468	375	STANDARD_FROM_LOOP_ERR_HANDLER (2); \
c0d99958 UD	376	} \
	377	} \
	378	\
b0df6f1a AJ	379	((uint32_t ) outptr) = ch; \
b0df6f1a AJ	380	outptr += sizeof (uint32_t); \
c0d99958 UD	381	}
c0d99958 UD	382	#define EXTRA_LOOP_DECLS , int *setp
655de5fd UD	383	#define INIT_PARAMS int set = (*setp >> 3) & CURRENT_MASK; \
	384	int ann = (*setp >> 3) & ~CURRENT_MASK
	385	#define UPDATE_PARAMS *setp = (set \| ann) << 3
c0d99958 UD	386	#define LOOP_NEED_FLAGS
	387	#include <iconv/loop.c>
	388
	389
	390	/* Next, define the other direction. */
faaa6f62 UD	391	#define MIN_NEEDED_INPUT TO_LOOP_MIN_NEEDED_FROM
	392	#define MAX_NEEDED_INPUT TO_LOOP_MAX_NEEDED_FROM
	393	#define MIN_NEEDED_OUTPUT TO_LOOP_MIN_NEEDED_TO
	394	#define MAX_NEEDED_OUTPUT TO_LOOP_MAX_NEEDED_TO
c0d99958 UD	395	#define LOOPFCT TO_LOOP
	396	#define BODY \
	397	{ \
	398	uint32_t ch; \
	399	size_t written = 0; \
	400	\
8c0b7170	401	ch = ((const uint32_t ) inptr); \
c0d99958 UD	402	\
	403	/* First see whether we can write the character using the currently \
	404	selected character set. */ \
	405	if (ch < 0x80) \
	406	{ \
	407	if (set != ASCII_set) \
	408	{ \
	409	*outptr++ = SI; \
	410	set = ASCII_set; \
	411	if (outptr == outend) \
	412	{ \
	413	result = __GCONV_FULL_OUTPUT; \
	414	break; \
	415	} \
	416	} \
	417	\
	418	*outptr++ = ch; \
	419	written = 1; \
	420	\
	421	/* At the end of the line we have to clear the `ann' flags since \
	422	every line must contain this information again. */ \
	423	if (ch == L'\n') \
	424	ann = 0; \
	425	} \
	426	else \
	427	{ \
085a4412	428	unsigned char buf[2]; \
c0d99958 UD	429	int used; \
c0d99958 UD	430	\
755104ed UD	431	if (set == GB2312_set \|\| ((ann & SO_ann) != CNS11643_1_ann \
755104ed UD	432	&& (ann & SO_ann) != ISO_IR_165_ann)) \
c0d99958 UD	433	{ \
	434	written = ucs4_to_gb2312 (ch, buf, 2); \
	435	used = GB2312_set; \
	436	} \
755104ed	437	else if (set == ISO_IR_165_set \|\| (ann & SO_ann) == ISO_IR_165_set) \
c0d99958	438	{ \
755104ed UD	439	written = ucs4_to_isoir165 (ch, buf, 2); \
755104ed UD	440	used = ISO_IR_165_set; \
c0d99958 UD	441	} \
	442	else \
	443	{ \
	444	written = ucs4_to_cns11643l1 (ch, buf, 2); \
	445	used = CNS11643_1_set; \
	446	} \
	447	\
	448	if (written == __UNKNOWN_10646_CHAR) \
	449	{ \
	450	/* Cannot convert it using the currently selected SO set. \
	451	Next try the SS2 set. */ \
	452	written = ucs4_to_cns11643l2 (ch, buf, 2); \
	453	if (written != __UNKNOWN_10646_CHAR) \
	454	/* Yep, that worked. */ \
	455	used = CNS11643_2_set; \
	456	else \
	457	{ \
085a4412	458	unsigned char tmpbuf[3]; \
c0d99958	459	\
755104ed	460	switch (0) \
c0d99958	461	{ \
755104ed UD	462	default: \
	463	/* Well, see whether we have to change the SO set. */ \
	464	\
	465	if (used != GB2312_set) \
	466	{ \
	467	written = ucs4_to_gb2312 (ch, buf, 2); \
	468	if (written != __UNKNOWN_10646_CHAR) \
	469	{ \
	470	used = GB2312_set; \
	471	break; \
	472	} \
	473	} \
	474	\
	475	if (used != ISO_IR_165_set) \
	476	{ \
	477	written = ucs4_to_isoir165 (ch, buf, 2); \
	478	if (written != __UNKNOWN_10646_CHAR) \
	479	{ \
	480	used = ISO_IR_165_set; \
	481	break; \
	482	} \
	483	} \
	484	\
	485	if (used != CNS11643_1_set) \
	486	{ \
	487	written = ucs4_to_cns11643l1 (ch, buf, 2); \
	488	if (written != __UNKNOWN_10646_CHAR) \
	489	{ \
	490	used = CNS11643_1_set; \
	491	break; \
	492	} \
	493	} \
	494	\
	495	written = ucs4_to_cns11643 (ch, tmpbuf, 3); \
289ac9dd	496	if (written == 3 && tmpbuf[0] >= 3 && tmpbuf[0] <= 7) \
755104ed UD	497	{ \
	498	buf[0] = tmpbuf[1]; \
	499	buf[1] = tmpbuf[2]; \
289ac9dd	500	switch (tmpbuf[0]) \
755104ed	501	{ \
289ac9dd	502	case 3: \
755104ed UD	503	used = CNS11643_3_set; \
755104ed UD	504	break; \
289ac9dd UD	505	case 4: \
	506	used = CNS11643_4_set; \
	507	break; \
	508	case 5: \
	509	used = CNS11643_5_set; \
	510	break; \
	511	case 6: \
	512	used = CNS11643_6_set; \
	513	break; \
	514	case 7: \
	515	used = CNS11643_7_set; \
	516	break; \
	517	default: \
	518	abort (); \
755104ed	519	} \
289ac9dd UD	520	written = 2; \
289ac9dd UD	521	break; \
755104ed UD	522	} \
755104ed UD	523	\
289ac9dd UD	524	/* XXX Currently GB7590 and GB13132 are not supported. */\
289ac9dd UD	525	\
c0d99958	526	/* Even this does not work. Error. */ \
755104ed UD	527	used = ASCII_set; \
	528	} \
	529	if (used == ASCII_set) \
	530	{ \
601d2942	531	UNICODE_TAG_HANDLER (ch, 4); \
e438a468	532	STANDARD_TO_LOOP_ERR_HANDLER (4); \
c0d99958 UD	533	} \
	534	} \
	535	} \
	536	assert (written == 2); \
	537	\
	538	/* See whether we have to emit an escape sequence. */ \
	539	if (set != used) \
	540	{ \
	541	/* First see whether we announced that we use this \
	542	character set. */ \
755104ed	543	if ((used & SO_mask) != 0 && (ann & SO_ann) != (used << 8)) \
c0d99958 UD	544	{ \
	545	const char *escseq; \
	546	\
	547	if (outptr + 4 > outend) \
	548	{ \
	549	result = __GCONV_FULL_OUTPUT; \
	550	break; \
	551	} \
	552	\
	553	assert (used >= 1 && used <= 4); \
755104ed UD	554	escseq = ")A\0\0)G)E" + (used - 1) * 2; \
	555	*outptr++ = ESC; \
	556	*outptr++ = '$'; \
	557	outptr++ = escseq++; \
	558	outptr++ = escseq++; \
	559	\
	560	ann = (ann & ~SO_ann) \| (used << 8); \
	561	} \
	562	else if ((used & SS2_mask) != 0 && (ann & SS2_ann) != (used << 8))\
	563	{ \
	564	const char *escseq; \
	565	\
	566	assert (used == CNS11643_2_set); /* XXX */ \
	567	escseq = "*H"; \
	568	*outptr++ = ESC; \
	569	*outptr++ = '$'; \
c0d99958 UD	570	outptr++ = escseq++; \
c0d99958 UD	571	outptr++ = escseq++; \
755104ed UD	572	\
	573	ann = (ann & ~SS2_ann) \| (used << 8); \
	574	} \
	575	else if ((used & SS3_mask) != 0 && (ann & SS3_ann) != (used << 8))\
	576	{ \
	577	const char *escseq; \
	578	\
	579	assert ((used >> 5) >= 3 && (used >> 5) <= 7); \
	580	escseq = "+I+J+K+L+M" + ((used >> 5) - 3) * 2; \
	581	*outptr++ = ESC; \
	582	*outptr++ = '$'; \
c0d99958 UD	583	outptr++ = escseq++; \
	584	outptr++ = escseq++; \
	585	\
755104ed	586	ann = (ann & ~SS3_ann) \| (used << 8); \
c0d99958 UD	587	} \
	588	\
	589	if (used == CNS11643_2_set) \
	590	{ \
	591	if (outptr + 2 > outend) \
	592	{ \
	593	result = __GCONV_FULL_OUTPUT; \
	594	break; \
	595	} \
	596	*outptr++ = SS2_0; \
	597	*outptr++ = SS2_1; \
	598	} \
755104ed UD	599	else if (used >= CNS11643_3_set && used <= CNS11643_7_set) \
	600	{ \
	601	if (outptr + 2 > outend) \
	602	{ \
	603	result = __GCONV_FULL_OUTPUT; \
	604	break; \
	605	} \
	606	*outptr++ = SS3_0; \
	607	*outptr++ = SS3_1; \
	608	} \
c0d99958 UD	609	else \
	610	{ \
	611	/* We only have to emit something if currently ASCII is \
	612	selected. Otherwise we are switching within the \
	613	SO charset. */ \
	614	if (set == ASCII_set) \
	615	{ \
	616	if (outptr + 1 > outend) \
	617	{ \
	618	result = __GCONV_FULL_OUTPUT; \
	619	break; \
	620	} \
	621	*outptr++ = SO; \
	622	} \
	623	} \
	624	\
	625	/* Always test the length here since we have used up all the \
	626	guaranteed output buffer slots. */ \
	627	if (outptr + 2 > outend) \
	628	{ \
	629	result = __GCONV_FULL_OUTPUT; \
	630	break; \
	631	} \
	632	} \
	633	else if (outptr + 2 > outend) \
	634	{ \
	635	result = __GCONV_FULL_OUTPUT; \
	636	break; \
	637	} \
	638	\
	639	*outptr++ = buf[0]; \
	640	*outptr++ = buf[1]; \
755104ed	641	set = used; \
c0d99958 UD	642	} \
	643	\
	644	/* Now that we wrote the output increment the input pointer. */ \
	645	inptr += 4; \
	646	}
	647	#define EXTRA_LOOP_DECLS , int *setp
655de5fd UD	648	#define INIT_PARAMS int set = (*setp >> 3) & CURRENT_MASK; \
655de5fd UD	649	int ann = (*setp >> 3) & ~CURRENT_MASK
4b1b449d UD	650	#define REINIT_PARAMS do \
	651	{ \
	652	set = (*setp >> 3) & CURRENT_MASK; \
	653	ann = (*setp >> 3) & ~CURRENT_MASK; \
	654	} \
	655	while (0)
655de5fd	656	#define UPDATE_PARAMS *setp = (set \| ann) << 3
c0d99958 UD	657	#define LOOP_NEED_FLAGS
	658	#include <iconv/loop.c>
	659
	660
	661	/* Now define the toplevel functions. */
	662	#include <iconv/skeleton.c>