[thirdparty/glibc.git] / iconvdata / utf-16.c

/* Conversion module for UTF-16.
   Copyright (C) 1999, 2000, 2001 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 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <byteswap.h>
#include <dlfcn.h>
#include <gconv.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

/* This is the Byte Order Mark character (BOM).  */
#define BOM	0xfeff
/* And in the other byte order.  */
#define BOM_OE	0xfffe


/* Definitions used in the body of the `gconv' function.  */
#define FROM_LOOP		from_utf16_loop
#define TO_LOOP			to_utf16_loop
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		2
#define MAX_NEEDED_FROM		4
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		(dir == from_utf16)
#define PREPARE_LOOP \
  enum direction dir = ((struct utf16_data *) step->__data)->dir;	      \
  enum variant var = ((struct utf16_data *) step->__data)->var;		      \
  int swap;								      \
  if (FROM_DIRECTION && var == UTF_16)					      \
    {									      \
      if (data->__invocation_counter == 0)				      \
	{								      \
	  /* We have to find out which byte order the file is encoded in.  */ \
	  if (inptr + 2 > inend)					      \
	    return __GCONV_EMPTY_INPUT;					      \
									      \
	  if (get16u (inptr) == BOM)					      \
	    /* Simply ignore the BOM character.  */			      \
	    *inptrp = inptr += 2;					      \
	  else if (get16u (inptr) == BOM_OE)				      \
	    {								      \
	      ((struct utf16_data *) step->__data)->swap = 1;		      \
	      *inptrp = inptr += 2;					      \
	    }								      \
	}								      \
    }									      \
  else if (!FROM_DIRECTION && var == UTF_16 && !data->__internal_use	      \
	   && data->__invocation_counter == 0)				      \
    {									      \
      /* Emit the Byte Order Mark.  */					      \
      if (__builtin_expect (outbuf + 2 > outend, 0))			      \
	return __GCONV_FULL_OUTPUT;					      \
									      \
      put16u (outbuf, BOM);						      \
      outbuf += 2;							      \
    }									      \
  swap = ((struct utf16_data *) step->__data)->swap;
#define EXTRA_LOOP_ARGS		, var, swap


/* Direction of the transformation.  */
enum direction
{
  illegal_dir,
  to_utf16,
  from_utf16
};

enum variant
{
  illegal_var,
  UTF_16,
  UTF_16LE,
  UTF_16BE
};

struct utf16_data
{
  enum direction dir;
  enum variant var;
  int swap;
};


extern int gconv_init (struct __gconv_step *step);
int
gconv_init (struct __gconv_step *step)
{
  /* Determine which direction.  */
  struct utf16_data *new_data;
  enum direction dir = illegal_dir;
  enum variant var = illegal_var;
  int result;

  if (__strcasecmp (step->__from_name, "UTF-16//") == 0)
    {
      dir = from_utf16;
      var = UTF_16;
    }
  else if (__strcasecmp (step->__to_name, "UTF-16//") == 0)
    {
      dir = to_utf16;
      var = UTF_16;
    }
  else if (__strcasecmp (step->__from_name, "UTF-16BE//") == 0)
    {
      dir = from_utf16;
      var = UTF_16BE;
    }
  else if (__strcasecmp (step->__to_name, "UTF-16BE//") == 0)
    {
      dir = to_utf16;
      var = UTF_16BE;
    }
  else if (__strcasecmp (step->__from_name, "UTF-16LE//") == 0)
    {
      dir = from_utf16;
      var = UTF_16LE;
    }
  else if (__strcasecmp (step->__to_name, "UTF-16LE//") == 0)
    {
      dir = to_utf16;
      var = UTF_16LE;
    }

  result = __GCONV_NOCONV;
  if (__builtin_expect (dir, to_utf16) != illegal_dir)
    {
      new_data = (struct utf16_data *) malloc (sizeof (struct utf16_data));

      result = __GCONV_NOMEM;
      if (new_data != NULL)
	{
	  new_data->dir = dir;
	  new_data->var = var;
	  new_data->swap = ((var == UTF_16LE && BYTE_ORDER == BIG_ENDIAN)
			    || (var == UTF_16BE
				&& BYTE_ORDER == LITTLE_ENDIAN));
	  step->__data = new_data;

	  if (dir == from_utf16)
	    {
	      step->__min_needed_from = MIN_NEEDED_FROM;
	      step->__max_needed_from = MAX_NEEDED_FROM;
	      step->__min_needed_to = MIN_NEEDED_TO;
	      step->__max_needed_to = MIN_NEEDED_TO;
	    }
	  else
	    {
	      step->__min_needed_from = MIN_NEEDED_TO;
	      step->__max_needed_from = MIN_NEEDED_TO;
	      step->__min_needed_to = MIN_NEEDED_FROM;
	      step->__max_needed_to = MAX_NEEDED_FROM;
	    }

	  step->__stateful = 0;

	  result = __GCONV_OK;
	}
    }

  return result;
}


extern void gconv_end (struct __gconv_step *data);
void
gconv_end (struct __gconv_step *data)
{
  free (data->__data);
}


/* Convert from the internal (UCS4-like) format to UTF-16.  */
#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 c = get32 (inptr);						      \
									      \
    if (__builtin_expect (c >= 0xd800 && c < 0xe000, 0))		      \
      {									      \
	/* Surrogate characters in UCS-4 input are not valid.		      \
	   We must catch this.  If we let surrogates pass through,	      \
	   attackers could make a security hole exploit by		      \
	   synthesizing any desired plane 1-16 character.  */		      \
	if (! ignore_errors_p ())					      \
	  {								      \
	    result = __GCONV_ILLEGAL_INPUT;				      \
	    break;							      \
	  }								      \
	inptr += 4;							      \
	++*irreversible;						      \
	continue;							      \
      }									      \
									      \
    if (swap)								      \
      {									      \
	if (__builtin_expect (c, 0) >= 0x10000)				      \
	  {								      \
	    if (__builtin_expect (c, 0) >= 0x110000)			      \
	      {								      \
		STANDARD_ERR_HANDLER (4);				      \
	      }								      \
									      \
	    /* Generate a surrogate character.  */			      \
	    if (__builtin_expect (outptr + 4 > outend, 0))		      \
	      {								      \
		/* Overflow in the output buffer.  */			      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
									      \
	    put16 (outptr, bswap_16 (0xd7c0 + (c >> 10)));		      \
	    outptr += 2;						      \
	    put16 (outptr, bswap_16 (0xdc00 + (c & 0x3ff)));		      \
	  }								      \
	else								      \
	  put16 (outptr, bswap_16 (c));					      \
      }									      \
    else								      \
      {									      \
	if (__builtin_expect (c, 0) >= 0x10000)				      \
	  {								      \
	    if (__builtin_expect (c, 0) >= 0x110000)			      \
	      {								      \
		STANDARD_ERR_HANDLER (4);				      \
	      }								      \
									      \
	    /* Generate a surrogate character.  */			      \
	    if (__builtin_expect (outptr + 4 > outend, 0))		      \
	      {								      \
		/* Overflow in the output buffer.  */			      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
									      \
	    put16 (outptr, 0xd7c0 + (c >> 10));				      \
	    outptr += 2;						      \
	    put16 (outptr, 0xdc00 + (c & 0x3ff));			      \
	  }								      \
	else								      \
	  put16 (outptr, c);						      \
      }									      \
    outptr += 2;							      \
    inptr += 4;								      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS \
	, enum variant var, int swap
#include <iconv/loop.c>


/* Convert from UTF-16 to the internal (UCS4-like) format.  */
#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 \
  {									      \
    uint16_t u1 = get16 (inptr);					      \
									      \
    if (swap)								      \
      {									      \
	u1 = bswap_16 (u1);						      \
									      \
	if (__builtin_expect (u1, 0) < 0xd800 || u1 > 0xdfff)		      \
	  {								      \
	    /* No surrogate.  */					      \
	    put32 (outptr, u1);						      \
	    inptr += 2;							      \
	  }								      \
	else								      \
	  {								      \
	    uint16_t u2;						      \
									      \
	    /* It's a surrogate character.  At least the first word says      \
	       it is.  */						      \
	    if (__builtin_expect (inptr + 4 > inend, 0))		      \
	      {								      \
		/* We don't have enough input for another complete input      \
		   character.  */					      \
		result = __GCONV_INCOMPLETE_INPUT;			      \
		break;							      \
	      }								      \
									      \
	    inptr += 2;							      \
	    u2 = bswap_16 (get16 (inptr));				      \
	    if (__builtin_expect (u2, 0xdc00) < 0xdc00			      \
		|| __builtin_expect (u2, 0xdc00) >= 0xdfff)		      \
	      {								      \
		/* This is no valid second word for a surrogate.  */	      \
		if (! ignore_errors_p ())				      \
		  {							      \
		    inptr -= 2;						      \
		    result = __GCONV_ILLEGAL_INPUT;			      \
		    break;						      \
		  }							      \
									      \
		++*irreversible;					      \
		continue;						      \
	      }								      \
									      \
	    put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00));	      \
	    inptr += 2;							      \
	  }								      \
      }									      \
    else								      \
      {									      \
	if (__builtin_expect (u1, 0) < 0xd800 || u1 > 0xdfff)		      \
	  {								      \
	    /* No surrogate.  */					      \
	    put32 (outptr, u1);						      \
	    inptr += 2;							      \
	  }								      \
	else								      \
	  {								      \
	    uint16_t u2;						      \
									      \
	    /* It's a surrogate character.  At least the first word says      \
	       it is.  */						      \
	    if (__builtin_expect (inptr + 4 > inend, 0))		      \
	      {								      \
		/* We don't have enough input for another complete input      \
		   character.  */					      \
		result = __GCONV_INCOMPLETE_INPUT;			      \
		break;							      \
	      }								      \
									      \
	    inptr += 2;							      \
	    u2 = get16 (inptr);						      \
	    if (__builtin_expect (u2, 0xdc00) < 0xdc00			      \
		|| __builtin_expect (u2, 0xdc00) >= 0xdfff)		      \
	      {								      \
		/* This is no valid second word for a surrogate.  */	      \
		if (! ignore_errors_p ())				      \
		  {							      \
		    inptr -= 2;						      \
		    result = __GCONV_ILLEGAL_INPUT;			      \
		    break;						      \
		  }							      \
									      \
		++*irreversible;					      \
		continue;						      \
	      }								      \
									      \
	    put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00));	      \
	    inptr += 2;							      \
	  }								      \
      }									      \
    outptr += 4;							      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS \
	, enum variant var, int swap
#include <iconv/loop.c>


/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>
Commit	Line	Data
7cdd956e	1	/* Conversion module for UTF-16.
b721a2c0	2	Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
7cdd956e 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
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.
7cdd956e 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.
7cdd956e	15
41bdb6e2 AJ	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library; if not, write to the Free
	18	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	19	02111-1307 USA. */
7cdd956e UD	20
7cdd956e UD	21	#include <byteswap.h>
55985355	22	#include <dlfcn.h>
7cdd956e UD	23	#include <gconv.h>
	24	#include <stddef.h>
	25	#include <stdint.h>
	26	#include <stdlib.h>
	27	#include <string.h>
	28
	29	/* This is the Byte Order Mark character (BOM). */
	30	#define BOM 0xfeff
8d617a71 UD	31	/* And in the other byte order. */
8d617a71 UD	32	#define BOM_OE 0xfffe
7cdd956e UD	33
	34
	35	/* Definitions used in the body of the `gconv' function. */
	36	#define FROM_LOOP from_utf16_loop
	37	#define TO_LOOP to_utf16_loop
	38	#define DEFINE_INIT 0
	39	#define DEFINE_FINI 0
	40	#define MIN_NEEDED_FROM 2
	41	#define MAX_NEEDED_FROM 4
	42	#define MIN_NEEDED_TO 4
	43	#define FROM_DIRECTION (dir == from_utf16)
	44	#define PREPARE_LOOP \
	45	enum direction dir = ((struct utf16_data *) step->__data)->dir; \
	46	enum variant var = ((struct utf16_data *) step->__data)->var; \
b721a2c0	47	int swap; \
59a8849d	48	if (FROM_DIRECTION && var == UTF_16) \
8d617a71 UD	49	{ \
	50	if (data->__invocation_counter == 0) \
	51	{ \
	52	/* We have to find out which byte order the file is encoded in. */ \
fd1b5c0f	53	if (inptr + 2 > inend) \
8d617a71 UD	54	return __GCONV_EMPTY_INPUT; \
8d617a71 UD	55	\
77e1d15a	56	if (get16u (inptr) == BOM) \
8d617a71	57	/* Simply ignore the BOM character. */ \
b721a2c0	58	*inptrp = inptr += 2; \
77e1d15a	59	else if (get16u (inptr) == BOM_OE) \
8d617a71 UD	60	{ \
8d617a71 UD	61	((struct utf16_data *) step->__data)->swap = 1; \
b721a2c0	62	*inptrp = inptr += 2; \
8d617a71 UD	63	} \
	64	} \
	65	} \
	66	else if (!FROM_DIRECTION && var == UTF_16 && !data->__internal_use \
	67	&& data->__invocation_counter == 0) \
7cdd956e UD	68	{ \
7cdd956e UD	69	/* Emit the Byte Order Mark. */ \
ee4ce289	70	if (__builtin_expect (outbuf + 2 > outend, 0)) \
7cdd956e UD	71	return __GCONV_FULL_OUTPUT; \
7cdd956e UD	72	\
77e1d15a	73	put16u (outbuf, BOM); \
7cdd956e	74	outbuf += 2; \
b721a2c0 UD	75	} \
b721a2c0 UD	76	swap = ((struct utf16_data *) step->__data)->swap;
55985355	77	#define EXTRA_LOOP_ARGS , var, swap
7cdd956e UD	78
	79
	80	/* Direction of the transformation. */
	81	enum direction
	82	{
	83	illegal_dir,
	84	to_utf16,
	85	from_utf16
	86	};
	87
	88	enum variant
	89	{
	90	illegal_var,
	91	UTF_16,
	92	UTF_16LE,
	93	UTF_16BE
	94	};
	95
	96	struct utf16_data
	97	{
	98	enum direction dir;
	99	enum variant var;
8d617a71	100	int swap;
7cdd956e UD	101	};
	102
	103
8c0b7170	104	extern int gconv_init (struct __gconv_step *step);
7cdd956e UD	105	int
	106	gconv_init (struct __gconv_step *step)
	107	{
	108	/* Determine which direction. */
	109	struct utf16_data *new_data;
	110	enum direction dir = illegal_dir;
	111	enum variant var = illegal_var;
	112	int result;
	113
755104ed	114	if (__strcasecmp (step->__from_name, "UTF-16//") == 0)
7cdd956e UD	115	{
	116	dir = from_utf16;
	117	var = UTF_16;
	118	}
755104ed	119	else if (__strcasecmp (step->__to_name, "UTF-16//") == 0)
7cdd956e UD	120	{
	121	dir = to_utf16;
	122	var = UTF_16;
	123	}
755104ed	124	else if (__strcasecmp (step->__from_name, "UTF-16BE//") == 0)
7cdd956e UD	125	{
	126	dir = from_utf16;
	127	var = UTF_16BE;
	128	}
755104ed	129	else if (__strcasecmp (step->__to_name, "UTF-16BE//") == 0)
7cdd956e UD	130	{
	131	dir = to_utf16;
	132	var = UTF_16BE;
	133	}
755104ed	134	else if (__strcasecmp (step->__from_name, "UTF-16LE//") == 0)
7cdd956e UD	135	{
	136	dir = from_utf16;
	137	var = UTF_16LE;
	138	}
755104ed	139	else if (__strcasecmp (step->__to_name, "UTF-16LE//") == 0)
7cdd956e UD	140	{
	141	dir = to_utf16;
	142	var = UTF_16LE;
	143	}
	144
	145	result = __GCONV_NOCONV;
ee4ce289	146	if (__builtin_expect (dir, to_utf16) != illegal_dir)
7cdd956e UD	147	{
	148	new_data = (struct utf16_data *) malloc (sizeof (struct utf16_data));
	149
	150	result = __GCONV_NOMEM;
	151	if (new_data != NULL)
	152	{
	153	new_data->dir = dir;
	154	new_data->var = var;
8d617a71 UD	155	new_data->swap = ((var == UTF_16LE && BYTE_ORDER == BIG_ENDIAN)
	156	\|\| (var == UTF_16BE
	157	&& BYTE_ORDER == LITTLE_ENDIAN));
7cdd956e UD	158	step->__data = new_data;
7cdd956e UD	159
bc4831b9	160	if (dir == from_utf16)
7cdd956e UD	161	{
7cdd956e UD	162	step->__min_needed_from = MIN_NEEDED_FROM;
b721a2c0	163	step->__max_needed_from = MAX_NEEDED_FROM;
7cdd956e UD	164	step->__min_needed_to = MIN_NEEDED_TO;
	165	step->__max_needed_to = MIN_NEEDED_TO;
	166	}
	167	else
	168	{
	169	step->__min_needed_from = MIN_NEEDED_TO;
	170	step->__max_needed_from = MIN_NEEDED_TO;
	171	step->__min_needed_to = MIN_NEEDED_FROM;
b721a2c0	172	step->__max_needed_to = MAX_NEEDED_FROM;
7cdd956e UD	173	}
	174
	175	step->__stateful = 0;
	176
	177	result = __GCONV_OK;
	178	}
	179	}
	180
	181	return result;
	182	}
	183
	184
8c0b7170	185	extern void gconv_end (struct __gconv_step *data);
7cdd956e UD	186	void
	187	gconv_end (struct __gconv_step *data)
	188	{
	189	free (data->__data);
	190	}
	191
	192
	193	/* Convert from the internal (UCS4-like) format to UTF-16. */
	194	#define MIN_NEEDED_INPUT MIN_NEEDED_TO
	195	#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
	196	#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
	197	#define LOOPFCT TO_LOOP
	198	#define BODY \
	199	{ \
77e1d15a	200	uint32_t c = get32 (inptr); \
7cdd956e	201	\
755104ed UD	202	if (__builtin_expect (c >= 0xd800 && c < 0xe000, 0)) \
	203	{ \
	204	/* Surrogate characters in UCS-4 input are not valid. \
	205	We must catch this. If we let surrogates pass through, \
	206	attackers could make a security hole exploit by \
	207	synthesizing any desired plane 1-16 character. */ \
	208	if (! ignore_errors_p ()) \
	209	{ \
	210	result = __GCONV_ILLEGAL_INPUT; \
	211	break; \
	212	} \
	213	inptr += 4; \
	214	++*irreversible; \
	215	continue; \
	216	} \
	217	\
8d617a71	218	if (swap) \
7cdd956e	219	{ \
ee4ce289	220	if (__builtin_expect (c, 0) >= 0x10000) \
7cdd956e	221	{ \
ee4ce289	222	if (__builtin_expect (c, 0) >= 0x110000) \
7cdd956e	223	{ \
d6204268	224	STANDARD_ERR_HANDLER (4); \
7cdd956e UD	225	} \
	226	\
	227	/* Generate a surrogate character. */ \
55985355	228	if (__builtin_expect (outptr + 4 > outend, 0)) \
7cdd956e UD	229	{ \
	230	/* Overflow in the output buffer. */ \
	231	result = __GCONV_FULL_OUTPUT; \
	232	break; \
	233	} \
	234	\
77e1d15a	235	put16 (outptr, bswap_16 (0xd7c0 + (c >> 10))); \
7cdd956e	236	outptr += 2; \
77e1d15a	237	put16 (outptr, bswap_16 (0xdc00 + (c & 0x3ff))); \
7cdd956e UD	238	} \
7cdd956e UD	239	else \
77e1d15a	240	put16 (outptr, bswap_16 (c)); \
7cdd956e UD	241	} \
	242	else \
	243	{ \
ee4ce289	244	if (__builtin_expect (c, 0) >= 0x10000) \
7cdd956e	245	{ \
ee4ce289	246	if (__builtin_expect (c, 0) >= 0x110000) \
7cdd956e	247	{ \
d6204268	248	STANDARD_ERR_HANDLER (4); \
7cdd956e UD	249	} \
	250	\
	251	/* Generate a surrogate character. */ \
55985355	252	if (__builtin_expect (outptr + 4 > outend, 0)) \
7cdd956e UD	253	{ \
	254	/* Overflow in the output buffer. */ \
	255	result = __GCONV_FULL_OUTPUT; \
	256	break; \
	257	} \
	258	\
77e1d15a	259	put16 (outptr, 0xd7c0 + (c >> 10)); \
7cdd956e	260	outptr += 2; \
77e1d15a	261	put16 (outptr, 0xdc00 + (c & 0x3ff)); \
7cdd956e UD	262	} \
7cdd956e UD	263	else \
77e1d15a	264	put16 (outptr, c); \
7cdd956e UD	265	} \
	266	outptr += 2; \
	267	inptr += 4; \
	268	}
55985355	269	#define LOOP_NEED_FLAGS
7cdd956e	270	#define EXTRA_LOOP_DECLS \
55985355	271	, enum variant var, int swap
7cdd956e UD	272	#include <iconv/loop.c>
	273
	274
	275	/* Convert from UTF-16 to the internal (UCS4-like) format. */
	276	#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
	277	#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
	278	#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
	279	#define LOOPFCT FROM_LOOP
	280	#define BODY \
	281	{ \
77e1d15a	282	uint16_t u1 = get16 (inptr); \
7cdd956e	283	\
8d617a71	284	if (swap) \
7cdd956e UD	285	{ \
	286	u1 = bswap_16 (u1); \
	287	\
ee4ce289	288	if (__builtin_expect (u1, 0) < 0xd800 \|\| u1 > 0xdfff) \
7cdd956e UD	289	{ \
7cdd956e UD	290	/* No surrogate. */ \
ee4ce289	291	put32 (outptr, u1); \
7cdd956e UD	292	inptr += 2; \
	293	} \
	294	else \
	295	{ \
	296	uint16_t u2; \
	297	\
	298	/* It's a surrogate character. At least the first word says \
	299	it is. */ \
55985355	300	if (__builtin_expect (inptr + 4 > inend, 0)) \
7cdd956e UD	301	{ \
	302	/* We don't have enough input for another complete input \
	303	character. */ \
	304	result = __GCONV_INCOMPLETE_INPUT; \
	305	break; \
	306	} \
	307	\
77e1d15a UD	308	inptr += 2; \
77e1d15a UD	309	u2 = bswap_16 (get16 (inptr)); \
ee4ce289 UD	310	if (__builtin_expect (u2, 0xdc00) < 0xdc00 \
ee4ce289 UD	311	\|\| __builtin_expect (u2, 0xdc00) >= 0xdfff) \
7cdd956e UD	312	{ \
7cdd956e UD	313	/* This is no valid second word for a surrogate. */ \
85830c4c UD	314	if (! ignore_errors_p ()) \
	315	{ \
	316	inptr -= 2; \
	317	result = __GCONV_ILLEGAL_INPUT; \
	318	break; \
	319	} \
	320	\
38677ace	321	++*irreversible; \
85830c4c	322	continue; \
7cdd956e UD	323	} \
7cdd956e UD	324	\
77e1d15a UD	325	put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \
77e1d15a UD	326	inptr += 2; \
7cdd956e UD	327	} \
	328	} \
	329	else \
	330	{ \
ee4ce289	331	if (__builtin_expect (u1, 0) < 0xd800 \|\| u1 > 0xdfff) \
7cdd956e UD	332	{ \
7cdd956e UD	333	/* No surrogate. */ \
77e1d15a	334	put32 (outptr, u1); \
7cdd956e UD	335	inptr += 2; \
	336	} \
	337	else \
	338	{ \
	339	uint16_t u2; \
	340	\
	341	/* It's a surrogate character. At least the first word says \
	342	it is. */ \
55985355	343	if (__builtin_expect (inptr + 4 > inend, 0)) \
7cdd956e UD	344	{ \
	345	/* We don't have enough input for another complete input \
	346	character. */ \
	347	result = __GCONV_INCOMPLETE_INPUT; \
	348	break; \
	349	} \
	350	\
77e1d15a UD	351	inptr += 2; \
77e1d15a UD	352	u2 = get16 (inptr); \
ee4ce289 UD	353	if (__builtin_expect (u2, 0xdc00) < 0xdc00 \
ee4ce289 UD	354	\|\| __builtin_expect (u2, 0xdc00) >= 0xdfff) \
7cdd956e UD	355	{ \
7cdd956e UD	356	/* This is no valid second word for a surrogate. */ \
85830c4c UD	357	if (! ignore_errors_p ()) \
	358	{ \
	359	inptr -= 2; \
	360	result = __GCONV_ILLEGAL_INPUT; \
	361	break; \
	362	} \
	363	\
38677ace	364	++*irreversible; \
85830c4c	365	continue; \
7cdd956e UD	366	} \
7cdd956e UD	367	\
77e1d15a UD	368	put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \
77e1d15a UD	369	inptr += 2; \
7cdd956e UD	370	} \
	371	} \
	372	outptr += 4; \
	373	}
55985355	374	#define LOOP_NEED_FLAGS
7cdd956e	375	#define EXTRA_LOOP_DECLS \
55985355	376	, enum variant var, int swap
7cdd956e UD	377	#include <iconv/loop.c>
	378
	379
	380	/* Now define the toplevel functions. */
	381	#include <iconv/skeleton.c>