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

/* Conversion module for UTF-16.
   Copyright (C) 1999, 2000-2002, 2003, 2005 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;		      \
  if (__builtin_expect (data->__invocation_counter == 0, 0) && var == UTF_16) \
    {									      \
      if (FROM_DIRECTION)						      \
	{								      \
	  /* We have to find out which byte order the file is encoded in.  */ \
	  if (inptr + 2 > inend)					      \
	    return (inptr == inend					      \
		    ? __GCONV_EMPTY_INPUT : __GCONV_INCOMPLETE_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 && !data->__internal_use)		      \
	{								      \
	  /* Emit the Byte Order Mark.  */				      \
	  if (__builtin_expect (outbuf + 2 > outend, 0))		      \
	    return __GCONV_FULL_OUTPUT;					      \
									      \
	  put16u (outbuf, BOM);						      \
	  outbuf += 2;							      \
	}								      \
    }									      \
  int swap = ((struct utf16_data *) step->__data)->swap;
#define EXTRA_LOOP_ARGS		, 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.  */		      \
	result = __GCONV_ILLEGAL_INPUT;					      \
	if (! ignore_errors_p ())					      \
	  break;							      \
	inptr += 4;							      \
	++*irreversible;						      \
	continue;							      \
      }									      \
									      \
    if (swap)								      \
      {									      \
	if (__builtin_expect (c >= 0x10000, 0))				      \
	  {								      \
	    if (__builtin_expect (c >= 0x110000, 0))			      \
	      {								      \
		STANDARD_TO_LOOP_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 >= 0x10000, 0))				      \
	  {								      \
	    if (__builtin_expect (c >= 0x110000, 0))			      \
	      {								      \
		STANDARD_TO_LOOP_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 \
	, 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 < 0xd800, 1) || 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, 0)			      \
		|| __builtin_expect (u2 > 0xdfff, 0))			      \
	      {								      \
		/* This is no valid second word for a surrogate.  */	      \
		inptr -= 2;						      \
		STANDARD_FROM_LOOP_ERR_HANDLER (2);			      \
	      }								      \
									      \
	    put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00));	      \
	    inptr += 2;							      \
	  }								      \
      }									      \
    else								      \
      {									      \
	if (__builtin_expect (u1 < 0xd800, 1) || u1 > 0xdfff)		      \
	  {								      \
	    /* No surrogate.  */					      \
	    put32 (outptr, u1);						      \
	    inptr += 2;							      \
	  }								      \
	else								      \
	  {								      \
	    /* 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;							      \
	    uint16_t u2 = get16 (inptr);				      \
	    if (__builtin_expect (u2 < 0xdc00, 0)			      \
		|| __builtin_expect (u2 > 0xdfff, 0))			      \
	      {								      \
		/* This is no valid second word for a surrogate.  */	      \
		inptr -= 2;						      \
		STANDARD_FROM_LOOP_ERR_HANDLER (2);			      \
	      }								      \
									      \
	    put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00));	      \
	    inptr += 2;							      \
	  }								      \
      }									      \
    outptr += 4;							      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS \
	, 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.
dc4bb1c2	2	Copyright (C) 1999, 2000-2002, 2003, 2005 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; \
dc4bb1c2	47	if (__builtin_expect (data->__invocation_counter == 0, 0) && var == UTF_16) \
8d617a71	48	{ \
dc4bb1c2	49	if (FROM_DIRECTION) \
8d617a71 UD	50	{ \
8d617a71 UD	51	/* We have to find out which byte order the file is encoded in. */ \
fd1b5c0f	52	if (inptr + 2 > inend) \
eb9dc2a2 UD	53	return (inptr == inend \
eb9dc2a2 UD	54	? __GCONV_EMPTY_INPUT : __GCONV_INCOMPLETE_INPUT); \
8d617a71	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	} \
8d617a71 UD	64	} \
dc4bb1c2 UD	65	else if (!FROM_DIRECTION && !data->__internal_use) \
	66	{ \
	67	/* Emit the Byte Order Mark. */ \
	68	if (__builtin_expect (outbuf + 2 > outend, 0)) \
	69	return __GCONV_FULL_OUTPUT; \
7cdd956e	70	\
dc4bb1c2 UD	71	put16u (outbuf, BOM); \
	72	outbuf += 2; \
	73	} \
b721a2c0	74	} \
dc4bb1c2 UD	75	int swap = ((struct utf16_data *) step->__data)->swap;
dc4bb1c2 UD	76	#define EXTRA_LOOP_ARGS , swap
7cdd956e UD	77
	78
	79	/* Direction of the transformation. */
	80	enum direction
	81	{
	82	illegal_dir,
	83	to_utf16,
	84	from_utf16
	85	};
	86
	87	enum variant
	88	{
	89	illegal_var,
	90	UTF_16,
	91	UTF_16LE,
	92	UTF_16BE
	93	};
	94
	95	struct utf16_data
	96	{
	97	enum direction dir;
	98	enum variant var;
8d617a71	99	int swap;
7cdd956e UD	100	};
	101
	102
8c0b7170	103	extern int gconv_init (struct __gconv_step *step);
7cdd956e UD	104	int
	105	gconv_init (struct __gconv_step *step)
	106	{
	107	/* Determine which direction. */
	108	struct utf16_data *new_data;
	109	enum direction dir = illegal_dir;
	110	enum variant var = illegal_var;
	111	int result;
	112
755104ed	113	if (__strcasecmp (step->__from_name, "UTF-16//") == 0)
7cdd956e UD	114	{
	115	dir = from_utf16;
	116	var = UTF_16;
	117	}
755104ed	118	else if (__strcasecmp (step->__to_name, "UTF-16//") == 0)
7cdd956e UD	119	{
	120	dir = to_utf16;
	121	var = UTF_16;
	122	}
755104ed	123	else if (__strcasecmp (step->__from_name, "UTF-16BE//") == 0)
7cdd956e UD	124	{
	125	dir = from_utf16;
	126	var = UTF_16BE;
	127	}
755104ed	128	else if (__strcasecmp (step->__to_name, "UTF-16BE//") == 0)
7cdd956e UD	129	{
	130	dir = to_utf16;
	131	var = UTF_16BE;
	132	}
755104ed	133	else if (__strcasecmp (step->__from_name, "UTF-16LE//") == 0)
7cdd956e UD	134	{
	135	dir = from_utf16;
	136	var = UTF_16LE;
	137	}
755104ed	138	else if (__strcasecmp (step->__to_name, "UTF-16LE//") == 0)
7cdd956e UD	139	{
	140	dir = to_utf16;
	141	var = UTF_16LE;
	142	}
	143
	144	result = __GCONV_NOCONV;
ee4ce289	145	if (__builtin_expect (dir, to_utf16) != illegal_dir)
7cdd956e UD	146	{
	147	new_data = (struct utf16_data *) malloc (sizeof (struct utf16_data));
	148
	149	result = __GCONV_NOMEM;
	150	if (new_data != NULL)
	151	{
	152	new_data->dir = dir;
	153	new_data->var = var;
8d617a71 UD	154	new_data->swap = ((var == UTF_16LE && BYTE_ORDER == BIG_ENDIAN)
	155	\|\| (var == UTF_16BE
	156	&& BYTE_ORDER == LITTLE_ENDIAN));
7cdd956e UD	157	step->__data = new_data;
7cdd956e UD	158
bc4831b9	159	if (dir == from_utf16)
7cdd956e UD	160	{
7cdd956e UD	161	step->__min_needed_from = MIN_NEEDED_FROM;
b721a2c0	162	step->__max_needed_from = MAX_NEEDED_FROM;
7cdd956e UD	163	step->__min_needed_to = MIN_NEEDED_TO;
	164	step->__max_needed_to = MIN_NEEDED_TO;
	165	}
	166	else
	167	{
	168	step->__min_needed_from = MIN_NEEDED_TO;
	169	step->__max_needed_from = MIN_NEEDED_TO;
	170	step->__min_needed_to = MIN_NEEDED_FROM;
b721a2c0	171	step->__max_needed_to = MAX_NEEDED_FROM;
7cdd956e UD	172	}
	173
	174	step->__stateful = 0;
	175
	176	result = __GCONV_OK;
	177	}
	178	}
	179
	180	return result;
	181	}
	182
	183
8c0b7170	184	extern void gconv_end (struct __gconv_step *data);
7cdd956e UD	185	void
	186	gconv_end (struct __gconv_step *data)
	187	{
	188	free (data->__data);
	189	}
	190
	191
	192	/* Convert from the internal (UCS4-like) format to UTF-16. */
	193	#define MIN_NEEDED_INPUT MIN_NEEDED_TO
	194	#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
	195	#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
	196	#define LOOPFCT TO_LOOP
	197	#define BODY \
	198	{ \
77e1d15a	199	uint32_t c = get32 (inptr); \
7cdd956e	200	\
755104ed UD	201	if (__builtin_expect (c >= 0xd800 && c < 0xe000, 0)) \
	202	{ \
	203	/* Surrogate characters in UCS-4 input are not valid. \
	204	We must catch this. If we let surrogates pass through, \
	205	attackers could make a security hole exploit by \
	206	synthesizing any desired plane 1-16 character. */ \
e438a468	207	result = __GCONV_ILLEGAL_INPUT; \
755104ed	208	if (! ignore_errors_p ()) \
e438a468	209	break; \
755104ed UD	210	inptr += 4; \
	211	++*irreversible; \
	212	continue; \
	213	} \
	214	\
8d617a71	215	if (swap) \
7cdd956e	216	{ \
db2d05f9	217	if (__builtin_expect (c >= 0x10000, 0)) \
7cdd956e	218	{ \
db2d05f9	219	if (__builtin_expect (c >= 0x110000, 0)) \
7cdd956e	220	{ \
e438a468	221	STANDARD_TO_LOOP_ERR_HANDLER (4); \
7cdd956e UD	222	} \
	223	\
	224	/* Generate a surrogate character. */ \
55985355	225	if (__builtin_expect (outptr + 4 > outend, 0)) \
7cdd956e UD	226	{ \
	227	/* Overflow in the output buffer. */ \
	228	result = __GCONV_FULL_OUTPUT; \
	229	break; \
	230	} \
	231	\
77e1d15a	232	put16 (outptr, bswap_16 (0xd7c0 + (c >> 10))); \
7cdd956e	233	outptr += 2; \
77e1d15a	234	put16 (outptr, bswap_16 (0xdc00 + (c & 0x3ff))); \
7cdd956e UD	235	} \
7cdd956e UD	236	else \
77e1d15a	237	put16 (outptr, bswap_16 (c)); \
7cdd956e UD	238	} \
	239	else \
	240	{ \
db2d05f9	241	if (__builtin_expect (c >= 0x10000, 0)) \
7cdd956e	242	{ \
db2d05f9	243	if (__builtin_expect (c >= 0x110000, 0)) \
7cdd956e	244	{ \
e438a468	245	STANDARD_TO_LOOP_ERR_HANDLER (4); \
7cdd956e UD	246	} \
	247	\
	248	/* Generate a surrogate character. */ \
55985355	249	if (__builtin_expect (outptr + 4 > outend, 0)) \
7cdd956e UD	250	{ \
	251	/* Overflow in the output buffer. */ \
	252	result = __GCONV_FULL_OUTPUT; \
	253	break; \
	254	} \
	255	\
77e1d15a	256	put16 (outptr, 0xd7c0 + (c >> 10)); \
7cdd956e	257	outptr += 2; \
77e1d15a	258	put16 (outptr, 0xdc00 + (c & 0x3ff)); \
7cdd956e UD	259	} \
7cdd956e UD	260	else \
77e1d15a	261	put16 (outptr, c); \
7cdd956e UD	262	} \
	263	outptr += 2; \
	264	inptr += 4; \
	265	}
55985355	266	#define LOOP_NEED_FLAGS
7cdd956e	267	#define EXTRA_LOOP_DECLS \
dc4bb1c2	268	, int swap
7cdd956e UD	269	#include <iconv/loop.c>
	270
	271
	272	/* Convert from UTF-16 to the internal (UCS4-like) format. */
	273	#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
	274	#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
	275	#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
	276	#define LOOPFCT FROM_LOOP
	277	#define BODY \
	278	{ \
77e1d15a	279	uint16_t u1 = get16 (inptr); \
7cdd956e	280	\
8d617a71	281	if (swap) \
7cdd956e UD	282	{ \
	283	u1 = bswap_16 (u1); \
	284	\
db2d05f9	285	if (__builtin_expect (u1 < 0xd800, 1) \|\| u1 > 0xdfff) \
7cdd956e UD	286	{ \
7cdd956e UD	287	/* No surrogate. */ \
ee4ce289	288	put32 (outptr, u1); \
7cdd956e UD	289	inptr += 2; \
	290	} \
	291	else \
	292	{ \
	293	uint16_t u2; \
	294	\
	295	/* It's a surrogate character. At least the first word says \
	296	it is. */ \
55985355	297	if (__builtin_expect (inptr + 4 > inend, 0)) \
7cdd956e UD	298	{ \
	299	/* We don't have enough input for another complete input \
	300	character. */ \
	301	result = __GCONV_INCOMPLETE_INPUT; \
	302	break; \
	303	} \
	304	\
77e1d15a UD	305	inptr += 2; \
77e1d15a UD	306	u2 = bswap_16 (get16 (inptr)); \
db2d05f9	307	if (__builtin_expect (u2 < 0xdc00, 0) \
5be072b6	308	\|\| __builtin_expect (u2 > 0xdfff, 0)) \
7cdd956e UD	309	{ \
7cdd956e UD	310	/* This is no valid second word for a surrogate. */ \
e438a468 UD	311	inptr -= 2; \
e438a468 UD	312	STANDARD_FROM_LOOP_ERR_HANDLER (2); \
7cdd956e UD	313	} \
7cdd956e UD	314	\
77e1d15a UD	315	put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \
77e1d15a UD	316	inptr += 2; \
7cdd956e UD	317	} \
	318	} \
	319	else \
	320	{ \
db2d05f9	321	if (__builtin_expect (u1 < 0xd800, 1) \|\| u1 > 0xdfff) \
7cdd956e UD	322	{ \
7cdd956e UD	323	/* No surrogate. */ \
77e1d15a	324	put32 (outptr, u1); \
7cdd956e UD	325	inptr += 2; \
	326	} \
	327	else \
	328	{ \
7cdd956e UD	329	/* It's a surrogate character. At least the first word says \
7cdd956e UD	330	it is. */ \
55985355	331	if (__builtin_expect (inptr + 4 > inend, 0)) \
7cdd956e UD	332	{ \
	333	/* We don't have enough input for another complete input \
	334	character. */ \
	335	result = __GCONV_INCOMPLETE_INPUT; \
	336	break; \
	337	} \
	338	\
77e1d15a	339	inptr += 2; \
dc4bb1c2	340	uint16_t u2 = get16 (inptr); \
db2d05f9	341	if (__builtin_expect (u2 < 0xdc00, 0) \
5be072b6	342	\|\| __builtin_expect (u2 > 0xdfff, 0)) \
7cdd956e UD	343	{ \
7cdd956e UD	344	/* This is no valid second word for a surrogate. */ \
e438a468 UD	345	inptr -= 2; \
e438a468 UD	346	STANDARD_FROM_LOOP_ERR_HANDLER (2); \
7cdd956e UD	347	} \
7cdd956e UD	348	\
77e1d15a UD	349	put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \
77e1d15a UD	350	inptr += 2; \
7cdd956e UD	351	} \
	352	} \
	353	outptr += 4; \
	354	}
55985355	355	#define LOOP_NEED_FLAGS
7cdd956e	356	#define EXTRA_LOOP_DECLS \
dc4bb1c2	357	, int swap
7cdd956e UD	358	#include <iconv/loop.c>
	359
	360
	361	/* Now define the toplevel functions. */
	362	#include <iconv/skeleton.c>