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

/* Conversion module for ISO-2022-CN.
   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.

   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 "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 sequence SS2 which replaces the SS2 designation for the next
   two bytes.  */
#define SI	0x0f
#define SO	0x0e
#define SS2_0	ESC
#define SS2_1	0x4e

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME		"ISO-2022-CN//"
#define DEFINE_INIT		1
#define DEFINE_FINI		1
#define FROM_LOOP		from_iso2022cn_loop
#define TO_LOOP			to_iso2022cn_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 COUNT element of the state keeps track of the currently selected
   character set.  The possible values are:  */
enum
{
  ASCII_set = 0,
  GB2312_set = 8,
  CNS11643_1_set = 16,
  CNS11643_2_set = 24,
  CURRENT_SEL_MASK = 24,
  GB2312_ann = 32,
  CNS11643_1_ann = 64,
  CNS11643_2_ann = 128,
  CURRENT_ANN_MASK = 224
};


/* 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 != 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;				      \
      else								      \
	{								      \
	  unsigned char *outbuf = data->__outbuf;			      \
	  								      \
	  /* We are not in the initial state.  To switch back we have	      \
	     to emit `SI'.  */						      \
	  if (__builtin_expect (outbuf == data->__outbufend, 0))	      \
	    /* We don't have enough room in the output buffer.  */	      \
	    status = __GCONV_FULL_OUTPUT;				      \
	  else								      \
	    {								      \
	      /* Write out the shift sequence.  */			      \
	      *outbuf++ = SI;						      \
	      data->__outbuf = outbuf;					      \
	      data->__statep->__count = ASCII_set;			      \
	    }								      \
	}								      \
    }


/* 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 (__builtin_expect (ch, 0) > 0x7f)				      \
      {									      \
	if (! ignore_errors_p ())					      \
	  {								      \
	    result = __GCONV_ILLEGAL_INPUT;				      \
	    break;							      \
	  }								      \
									      \
	++inptr;							      \
	++*irreversible;						      \
	continue;							      \
      }									      \
									      \
    /* Recognize escape sequences.  */					      \
    if (__builtin_expect (ch, 0) == ESC)				      \
      {									      \
	/* There are two 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.			      \
	*/								      \
	if (__builtin_expect (inptr + 2 > inend, 0)			      \
	    || (inptr[1] == '$'						      \
		&& (__builtin_expect (inptr + 3 > inend, 0)		      \
		    || (inptr[2] == ')'					      \
			&& __builtin_expect (inptr + 4 > inend, 0))	      \
		    || (inptr[2] == '*'					      \
			&& __builtin_expect (inptr + 4 > inend, 0))))	      \
	    || (inptr[1] == SS2_1					      \
		&& __builtin_expect (inptr + 4 > inend, 0)))		      \
	  {								      \
	    result = __GCONV_INCOMPLETE_INPUT;				      \
	    break;							      \
	  }								      \
	if (inptr[1] == '$'						      \
	    && ((inptr[2] == ')' && (inptr[3] == 'A' || inptr[3] == 'G'))     \
		|| (inptr[2] == '*' && inptr[3] == 'H')))		      \
	  {								      \
	    /* OK, we accept those character sets.  */			      \
	    if (inptr[3] == 'A')					      \
	      ann = GB2312_ann;						      \
	    else if (inptr[3] == 'G')					      \
	      ann = CNS11643_1_ann;					      \
	    inptr += 4;							      \
	    continue;							      \
	  }								      \
      }									      \
    else if (__builtin_expect (ch, 0) == SO)				      \
      {									      \
	/* Switch to use GB2312 or CNS 11643 plane 1, 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 behaviour (e.g., we should flag an error) let me know.  */    \
	++inptr;							      \
	set = ann == CNS11643_1_ann ? CNS11643_1_set : GB2312_set;	      \
	continue;							      \
      }									      \
    else if (__builtin_expect (ch, 0) == SI)				      \
      {									      \
	/* Switch to use ASCII.  */					      \
	++inptr;							      \
	set = ASCII_set;						      \
	continue;							      \
      }									      \
									      \
    if (__builtin_expect (ch, 0) == 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.  */					      \
	inptr += 2;							      \
	ch = cns11643l2_to_ucs4 (&inptr, 2, 0);				      \
	if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)		      \
	  {								      \
	    if (! ignore_errors_p ())					      \
	      {								      \
		/* This is an illegal character.  */			      \
	        inptr -= 2;						      \
		result = __GCONV_ILLEGAL_INPUT;				      \
		break;							      \
	      }								      \
									      \
	    ++*irreversible;						      \
	    continue;							      \
	  }								      \
      }									      \
    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 (set == GB2312_set)						      \
	  ch = gb2312_to_ucs4 (&inptr, inend - inptr, 0);		      \
	else								      \
	  {								      \
	    assert (set == CNS11643_1_set);				      \
	    ch = cns11643l1_to_ucs4 (&inptr, inend - inptr, 0);		      \
	  }								      \
									      \
	if (__builtin_expect (ch, 1) == 0)				      \
	  {								      \
	    result = __GCONV_INCOMPLETE_INPUT;				      \
	    break;							      \
	  }								      \
	else if (__builtin_expect (ch, 1) == __UNKNOWN_10646_CHAR)	      \
	  {								      \
	    if (! ignore_errors_p ())					      \
	      {								      \
		/* This is an illegal character.  */			      \
		result = __GCONV_ILLEGAL_INPUT;				      \
		break;							      \
	      }								      \
									      \
	    ++inptr;							      \
	    ++*irreversible;						      \
	    continue;							      \
	  }								      \
      }									      \
									      \
    put32 (outptr, ch);							      \
    outptr += 4;							      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *setp
#define INIT_PARAMS		int set = *setp & CURRENT_SEL_MASK; \
				int ann = *setp & CURRENT_ANN_MASK
#define UPDATE_PARAMS		*setp = set | ann
#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 = get32 (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 (__builtin_expect (outptr == outend, 0))			      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	  }								      \
									      \
	*outptr++ = ch;							      \
									      \
	/* 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;							      \
	size_t written = 0;						      \
									      \
	if (set == GB2312_set || (ann & CNS11643_1_ann) == 0)		      \
	  {								      \
	    written = ucs4_to_gb2312 (ch, buf, 2);			      \
	    used = GB2312_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							      \
	      {								      \
		/* Well, see whether we have to change the SO set.  */	      \
		if (used == GB2312_set)					      \
		  written = ucs4_to_cns11643l1 (ch, buf, 2);		      \
		else							      \
		  written = ucs4_to_gb2312 (ch, buf, 2);		      \
									      \
		if (__builtin_expect (written, 0) != __UNKNOWN_10646_CHAR)    \
		  /* Oh well, then switch SO.  */			      \
		  used = GB2312_set + CNS11643_1_set - used;		      \
		else							      \
		  {							      \
		    /* Even this does not work.  Error.  */		      \
		    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 ((ann & (16 << (used >> 3))) == 0)			      \
	      {								      \
		const char *escseq;					      \
									      \
		if (__builtin_expect (outptr + 4 > outend, 0))		      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
									      \
		assert ((used >> 3) >= 1 && (used >> 3) <= 3);		      \
		escseq = ")A)G*H" + ((used >> 3) - 1) * 2;		      \
		*outptr++ = ESC;					      \
		*outptr++ = '$';					      \
		*outptr++ = *escseq++;					      \
		*outptr++ = *escseq++;					      \
									      \
		if (used == GB2312_set)					      \
		  ann = (ann & CNS11643_2_ann) | GB2312_ann;		      \
		else if (used == CNS11643_1_set)			      \
		  ann = (ann & CNS11643_2_ann) | CNS11643_1_ann;	      \
		else							      \
		  ann |= CNS11643_2_ann;				      \
	      }								      \
									      \
	    if (used == CNS11643_2_set)					      \
	      {								      \
		if (__builtin_expect (outptr + 2 > outend, 0))		      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
		*outptr++ = SS2_0;					      \
		*outptr++ = SS2_1;					      \
	      }								      \
	    else							      \
	      {								      \
		/* We only have to emit something is currently ASCII is	      \
		   selected.  Otherwise we are switching within the	      \
		   SO charset.  */					      \
		if (set == ASCII_set)					      \
		  {							      \
		    if (__builtin_expect (outptr + 1 > outend, 0))	      \
		      {							      \
			result = __GCONV_FULL_OUTPUT;			      \
			break;						      \
		      }							      \
		    *outptr++ = SO;					      \
		  }							      \
	      }								      \
									      \
	    /* Always test the length here since we have used up all the      \
	       guaranteed output buffer slots.  */			      \
	    if (__builtin_expect (outptr + 2 > outend, 0))		      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	  }								      \
	else if (__builtin_expect (outptr + 2 > outend, 0))		      \
	  {								      \
	    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 LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *setp
#define INIT_PARAMS		int set = *setp & CURRENT_SEL_MASK; \
				int ann = *setp & CURRENT_ANN_MASK
#define UPDATE_PARAMS		*setp = set | ann
#include <iconv/loop.c>


/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>
Commit	Line	Data
15a2315c	1	/* Conversion module for ISO-2022-CN.
77e1d15a	2	Copyright (C) 1999, 2000 Free Software Foundation, Inc.
15a2315c UD	3	This file is part of the GNU C Library.
	4	Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
	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
55985355	21	#include <dlfcn.h>
15a2315c UD	22	#include <gconv.h>
	23	#include <stdint.h>
	24	#include <string.h>
	25	#include "gb2312.h"
	26	#include "cns11643l1.h"
	27	#include "cns11643l2.h"
	28
	29	#include <assert.h>
	30
	31	/* This makes obvious what everybody knows: 0x1b is the Esc character. */
	32	#define ESC 0x1b
	33
	34	/* We have single-byte shift-in and shift-out sequences, and the single
	35	shift sequence SS2 which replaces the SS2 designation for the next
	36	two bytes. */
	37	#define SI 0x0f
	38	#define SO 0x0e
	39	#define SS2_0 ESC
	40	#define SS2_1 0x4e
	41
	42	/* Definitions used in the body of the `gconv' function. */
	43	#define CHARSET_NAME "ISO-2022-CN//"
	44	#define DEFINE_INIT 1
	45	#define DEFINE_FINI 1
	46	#define FROM_LOOP from_iso2022cn_loop
	47	#define TO_LOOP to_iso2022cn_loop
	48	#define MIN_NEEDED_FROM 1
	49	#define MAX_NEEDED_FROM 4
	50	#define MIN_NEEDED_TO 4
	51	#define MAX_NEEDED_TO 4
	52	#define PREPARE_LOOP \
	53	int save_set; \
aa831d6d	54	int *setp = &data->__statep->__count;
15a2315c UD	55	#define EXTRA_LOOP_ARGS , setp
	56
	57
	58	/* The COUNT element of the state keeps track of the currently selected
	59	character set. The possible values are: */
	60	enum
	61	{
	62	ASCII_set = 0,
fd1b5c0f UD	63	GB2312_set = 8,
	64	CNS11643_1_set = 16,
	65	CNS11643_2_set = 24,
	66	CURRENT_SEL_MASK = 24,
	67	GB2312_ann = 32,
	68	CNS11643_1_ann = 64,
	69	CNS11643_2_ann = 128,
	70	CURRENT_ANN_MASK = 224
15a2315c UD	71	};
	72
	73
	74	/* Since this is a stateful encoding we have to provide code which resets
	75	the output state to the initial state. This has to be done during the
	76	flushing. */
	77	#define EMIT_SHIFT_TO_INIT \
aa831d6d	78	if (data->__statep->__count != ASCII_set) \
15a2315c UD	79	{ \
	80	if (FROM_DIRECTION) \
	81	/* It's easy, we don't have to emit anything, we just reset the \
	82	state for the input. */ \
aa831d6d	83	data->__statep->__count = ASCII_set; \
15a2315c UD	84	else \
	85	{ \
	86	unsigned char *outbuf = data->__outbuf; \
	87	\
	88	/* We are not in the initial state. To switch back we have \
	89	to emit `SI'. */ \
89301d68	90	if (__builtin_expect (outbuf == data->__outbufend, 0)) \
15a2315c UD	91	/* We don't have enough room in the output buffer. */ \
	92	status = __GCONV_FULL_OUTPUT; \
	93	else \
	94	{ \
	95	/* Write out the shift sequence. */ \
	96	*outbuf++ = SI; \
15a2315c	97	data->__outbuf = outbuf; \
aa831d6d	98	data->__statep->__count = ASCII_set; \
15a2315c UD	99	} \
	100	} \
	101	}
	102
	103
	104	/* Since we might have to reset input pointer we must be able to save
	105	and retore the state. */
	106	#define SAVE_RESET_STATE(Save) \
	107	if (Save) \
	108	save_set = *setp; \
	109	else \
	110	*setp = save_set
	111
	112
	113	/* First define the conversion function from ISO-2022-CN to UCS4. */
	114	#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
	115	#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
	116	#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
	117	#define LOOPFCT FROM_LOOP
	118	#define BODY \
	119	{ \
	120	uint32_t ch = *inptr; \
	121	\
	122	/* This is a 7bit character set, disallow all 8bit characters. */ \
89301d68	123	if (__builtin_expect (ch, 0) > 0x7f) \
15a2315c	124	{ \
85830c4c UD	125	if (! ignore_errors_p ()) \
	126	{ \
	127	result = __GCONV_ILLEGAL_INPUT; \
	128	break; \
	129	} \
	130	\
	131	++inptr; \
38677ace	132	++*irreversible; \
85830c4c	133	continue; \
15a2315c UD	134	} \
	135	\
	136	/* Recognize escape sequences. */ \
89301d68	137	if (__builtin_expect (ch, 0) == ESC) \
15a2315c UD	138	{ \
	139	/* There are two kinds of escape sequences we have to handle: \
	140	- those announcing the use of GB and CNS characters on the \
	141	line; we can simply ignore them \
	142	- the initial byte of the SS2 sequence. \
	143	*/ \
755104ed	144	if (__builtin_expect (inptr + 2 > inend, 0) \
55985355	145	\|\| (inptr[1] == '$' \
755104ed	146	&& (__builtin_expect (inptr + 3 > inend, 0) \
55985355	147	\|\| (inptr[2] == ')' \
755104ed	148	&& __builtin_expect (inptr + 4 > inend, 0)) \
55985355	149	\|\| (inptr[2] == '*' \
755104ed	150	&& __builtin_expect (inptr + 4 > inend, 0)))) \
55985355	151	\|\| (inptr[1] == SS2_1 \
755104ed	152	&& __builtin_expect (inptr + 4 > inend, 0))) \
15a2315c	153	{ \
c7c3b0e9	154	result = __GCONV_INCOMPLETE_INPUT; \
15a2315c UD	155	break; \
	156	} \
	157	if (inptr[1] == '$' \
	158	&& ((inptr[2] == ')' && (inptr[3] == 'A' \|\| inptr[3] == 'G')) \
	159	\|\| (inptr[2] == '*' && inptr[3] == 'H'))) \
	160	{ \
	161	/* OK, we accept those character sets. */ \
	162	if (inptr[3] == 'A') \
	163	ann = GB2312_ann; \
	164	else if (inptr[3] == 'G') \
	165	ann = CNS11643_1_ann; \
	166	inptr += 4; \
	167	continue; \
	168	} \
	169	} \
89301d68	170	else if (__builtin_expect (ch, 0) == SO) \
15a2315c UD	171	{ \
	172	/* Switch to use GB2312 or CNS 11643 plane 1, depending on which \
	173	S0 designation came last. The only problem is what to do with \
	174	faulty input files where no designator came. \
	175	XXX For now I'll default to use GB2312. If this is not the \
	176	best behaviour (e.g., we should flag an error) let me know. */ \
	177	++inptr; \
	178	set = ann == CNS11643_1_ann ? CNS11643_1_set : GB2312_set; \
	179	continue; \
	180	} \
89301d68	181	else if (__builtin_expect (ch, 0) == SI) \
15a2315c UD	182	{ \
	183	/* Switch to use ASCII. */ \
	184	++inptr; \
	185	set = ASCII_set; \
	186	continue; \
	187	} \
	188	\
89301d68	189	if (__builtin_expect (ch, 0) == ESC && inptr[1] == SS2_1) \
15a2315c UD	190	{ \
	191	/* This is a character from CNS 11643 plane 2. \
	192	XXX We could test here whether the use of this character \
	193	set was announced. */ \
	194	inptr += 2; \
	195	ch = cns11643l2_to_ucs4 (&inptr, 2, 0); \
89301d68	196	if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR) \
15a2315c	197	{ \
85830c4c UD	198	if (! ignore_errors_p ()) \
	199	{ \
	200	/* This is an illegal character. */ \
	201	inptr -= 2; \
	202	result = __GCONV_ILLEGAL_INPUT; \
	203	break; \
	204	} \
	205	\
38677ace	206	++*irreversible; \
85830c4c	207	continue; \
15a2315c UD	208	} \
	209	} \
	210	else if (set == ASCII_set) \
	211	{ \
	212	/* Almost done, just advance the input pointer. */ \
	213	++inptr; \
	214	} \
	215	else \
	216	{ \
	217	/* That's pretty easy, we have a dedicated functions for this. */ \
	218	if (set == GB2312_set) \
55985355	219	ch = gb2312_to_ucs4 (&inptr, inend - inptr, 0); \
15a2315c UD	220	else \
	221	{ \
	222	assert (set == CNS11643_1_set); \
55985355	223	ch = cns11643l1_to_ucs4 (&inptr, inend - inptr, 0); \
15a2315c UD	224	} \
15a2315c UD	225	\
55985355	226	if (__builtin_expect (ch, 1) == 0) \
15a2315c	227	{ \
c7c3b0e9	228	result = __GCONV_INCOMPLETE_INPUT; \
15a2315c UD	229	break; \
15a2315c UD	230	} \
89301d68	231	else if (__builtin_expect (ch, 1) == __UNKNOWN_10646_CHAR) \
15a2315c	232	{ \
85830c4c UD	233	if (! ignore_errors_p ()) \
	234	{ \
	235	/* This is an illegal character. */ \
	236	result = __GCONV_ILLEGAL_INPUT; \
	237	break; \
	238	} \
	239	\
	240	++inptr; \
38677ace	241	++*irreversible; \
85830c4c	242	continue; \
15a2315c UD	243	} \
	244	} \
	245	\
77e1d15a UD	246	put32 (outptr, ch); \
77e1d15a UD	247	outptr += 4; \
15a2315c	248	}
55985355	249	#define LOOP_NEED_FLAGS
15a2315c	250	#define EXTRA_LOOP_DECLS , int *setp
fd1b5c0f UD	251	#define INIT_PARAMS int set = *setp & CURRENT_SEL_MASK; \
fd1b5c0f UD	252	int ann = *setp & CURRENT_ANN_MASK
15a2315c UD	253	#define UPDATE_PARAMS *setp = set \| ann
	254	#include <iconv/loop.c>
	255
	256
	257	/* Next, define the other direction. */
	258	#define MIN_NEEDED_INPUT MIN_NEEDED_TO
	259	#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
	260	#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
	261	#define LOOPFCT TO_LOOP
	262	#define BODY \
	263	{ \
89301d68	264	uint32_t ch = get32 (inptr); \
15a2315c UD	265	\
	266	/* First see whether we can write the character using the currently \
	267	selected character set. */ \
	268	if (ch < 0x80) \
	269	{ \
	270	if (set != ASCII_set) \
	271	{ \
	272	*outptr++ = SI; \
	273	set = ASCII_set; \
55985355	274	if (__builtin_expect (outptr == outend, 0)) \
15a2315c UD	275	{ \
	276	result = __GCONV_FULL_OUTPUT; \
	277	break; \
	278	} \
	279	} \
	280	\
	281	*outptr++ = ch; \
15a2315c UD	282	\
	283	/* At the end of the line we have to clear the `ann' flags since \
	284	every line must contain this information again. */ \
	285	if (ch == L'\n') \
	286	ann = 0; \
	287	} \
	288	else \
	289	{ \
	290	char buf[2]; \
	291	int used; \
89301d68	292	size_t written = 0; \
15a2315c UD	293	\
	294	if (set == GB2312_set \|\| (ann & CNS11643_1_ann) == 0) \
	295	{ \
	296	written = ucs4_to_gb2312 (ch, buf, 2); \
	297	used = GB2312_set; \
	298	} \
	299	else \
	300	{ \
	301	written = ucs4_to_cns11643l1 (ch, buf, 2); \
	302	used = CNS11643_1_set; \
	303	} \
	304	\
	305	if (written == __UNKNOWN_10646_CHAR) \
	306	{ \
	307	/* Cannot convert it using the currently selected SO set. \
	308	Next try the SS2 set. */ \
	309	written = ucs4_to_cns11643l2 (ch, buf, 2); \
	310	if (written != __UNKNOWN_10646_CHAR) \
	311	/* Yep, that worked. */ \
	312	used = CNS11643_2_set; \
	313	else \
	314	{ \
	315	/* Well, see whether we have to change the SO set. */ \
755104ed	316	if (used == GB2312_set) \
15a2315c UD	317	written = ucs4_to_cns11643l1 (ch, buf, 2); \
	318	else \
	319	written = ucs4_to_gb2312 (ch, buf, 2); \
	320	\
1f20e04b	321	if (__builtin_expect (written, 0) != __UNKNOWN_10646_CHAR) \
15a2315c	322	/* Oh well, then switch SO. */ \
755104ed	323	used = GB2312_set + CNS11643_1_set - used; \
15a2315c UD	324	else \
	325	{ \
	326	/* Even this does not work. Error. */ \
d6204268	327	STANDARD_ERR_HANDLER (4); \
15a2315c UD	328	} \
	329	} \
	330	} \
	331	assert (written == 2); \
	332	\
	333	/* See whether we have to emit an escape sequence. */ \
	334	if (set != used) \
	335	{ \
	336	/* First see whether we announced that we use this \
	337	character set. */ \
755104ed	338	if ((ann & (16 << (used >> 3))) == 0) \
15a2315c UD	339	{ \
	340	const char *escseq; \
	341	\
55985355	342	if (__builtin_expect (outptr + 4 > outend, 0)) \
15a2315c UD	343	{ \
	344	result = __GCONV_FULL_OUTPUT; \
	345	break; \
	346	} \
	347	\
755104ed UD	348	assert ((used >> 3) >= 1 && (used >> 3) <= 3); \
	349	escseq = ")A)GH" + ((used >> 3) - 1) 2; \
	350	*outptr++ = ESC; \
	351	*outptr++ = '$'; \
15a2315c UD	352	outptr++ = escseq++; \
	353	outptr++ = escseq++; \
	354	\
	355	if (used == GB2312_set) \
	356	ann = (ann & CNS11643_2_ann) \| GB2312_ann; \
	357	else if (used == CNS11643_1_set) \
	358	ann = (ann & CNS11643_2_ann) \| CNS11643_1_ann; \
	359	else \
	360	ann \|= CNS11643_2_ann; \
	361	} \
	362	\
	363	if (used == CNS11643_2_set) \
	364	{ \
89301d68	365	if (__builtin_expect (outptr + 2 > outend, 0)) \
15a2315c UD	366	{ \
	367	result = __GCONV_FULL_OUTPUT; \
	368	break; \
	369	} \
	370	*outptr++ = SS2_0; \
	371	*outptr++ = SS2_1; \
	372	} \
	373	else \
	374	{ \
	375	/* We only have to emit something is currently ASCII is \
	376	selected. Otherwise we are switching within the \
	377	SO charset. */ \
	378	if (set == ASCII_set) \
	379	{ \
89301d68	380	if (__builtin_expect (outptr + 1 > outend, 0)) \
15a2315c UD	381	{ \
	382	result = __GCONV_FULL_OUTPUT; \
	383	break; \
	384	} \
	385	*outptr++ = SO; \
	386	} \
	387	} \
	388	\
	389	/* Always test the length here since we have used up all the \
	390	guaranteed output buffer slots. */ \
89301d68	391	if (__builtin_expect (outptr + 2 > outend, 0)) \
15a2315c UD	392	{ \
	393	result = __GCONV_FULL_OUTPUT; \
	394	break; \
	395	} \
	396	} \
55985355	397	else if (__builtin_expect (outptr + 2 > outend, 0)) \
15a2315c UD	398	{ \
	399	result = __GCONV_FULL_OUTPUT; \
	400	break; \
	401	} \
	402	\
	403	*outptr++ = buf[0]; \
	404	*outptr++ = buf[1]; \
755104ed	405	set = used; \
15a2315c UD	406	} \
	407	\
	408	/* Now that we wrote the output increment the input pointer. */ \
	409	inptr += 4; \
	410	}
55985355	411	#define LOOP_NEED_FLAGS
15a2315c	412	#define EXTRA_LOOP_DECLS , int *setp
fd1b5c0f UD	413	#define INIT_PARAMS int set = *setp & CURRENT_SEL_MASK; \
fd1b5c0f UD	414	int ann = *setp & CURRENT_ANN_MASK
15a2315c UD	415	#define UPDATE_PARAMS *setp = set \| ann
	416	#include <iconv/loop.c>
	417
	418
	419	/* Now define the toplevel functions. */
	420	#include <iconv/skeleton.c>