/* Mapping tables for EUC-KR handling.

   Copyright (C) 1998-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jungshik Shin <jshin@pantheon.yale.edu>

   and Ulrich Drepper <drepper@cygnus.com>, 1998.

   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 <stdint.h>

#include <ksc5601.h>

static inline void

__attribute ((always_inline))

euckr_from_ucs4 (uint32_t ch, unsigned char *cp)

{

  if (ch > 0x9f)

    {

      if (__builtin_expect (ch, 0) == 0x20a9)

	{

	  /* Half-width Korean Currency WON sign.  There is no

             equivalent in EUC-KR.  Some mappings use \x5c because

             this is what some old Korean ASCII variants used but this

             is causing problems.  We map it to the FULL WIDTH WON SIGN.  */

	  cp[0] = '\xa3';

	  cp[1] = '\xdc';

	}

      else if (__builtin_expect (ucs4_to_ksc5601 (ch, cp, 2), 0)

	  != __UNKNOWN_10646_CHAR)

	{

	  cp[0] |= 0x80;

	  cp[1] |= 0x80;

	}

      else

	cp[0] = cp[1] = '\0';

    }

  else

    {

      /* There is no mapping for U005c but we nevertheless map it to

	 \x5c.  */

      cp[0] = (unsigned char) ch;

      cp[1] = '\0';

    }

}

/* Definitions used in the body of the `gconv' function.  */

#define CHARSET_NAME		"EUC-KR//"

#define FROM_LOOP		from_euc_kr

#define TO_LOOP			to_euc_kr

#define DEFINE_INIT		1

#define DEFINE_FINI		1

#define MIN_NEEDED_FROM		1

#define MAX_NEEDED_FROM		2

#define MIN_NEEDED_TO		4

#define ONE_DIRECTION		0

/* First define the conversion function from EUC-KR 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;						      \

									      \

    if (ch <= 0x9f)							      \

      ++inptr;								      \

    else if (__glibc_unlikely (ch == 0xa0))				      \

      {									      \

	/* This is illegal.  */						      \

	STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \

      }									      \

    else								      \

      {									      \

	/* Two-byte character.  First test whether the next byte	      \

	   is also available.  */					      \

	ch = ksc5601_to_ucs4 (&inptr, inend - inptr, 0x80);		      \

	if (__glibc_unlikely (ch == 0))					      \

	  {								      \

	    /* The second byte is not available.  */			      \

	    result = __GCONV_INCOMPLETE_INPUT;				      \

	    break;							      \

	  }								      \

	if (__glibc_unlikely (ch == __UNKNOWN_10646_CHAR))		      \

	  /* This is an illegal character.  */				      \

	  STANDARD_FROM_LOOP_ERR_HANDLER (2);				      \

      }									      \

									      \

    put32 (outptr, ch);							      \

    outptr += 4;							      \

  }

#define LOOP_NEED_FLAGS

#define ONEBYTE_BODY \

  {									      \

    if (c <= 0x9f)							      \

      return c;								      \

    else								      \

      return WEOF;							      \

  }

#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);					      \

    unsigned char cp[2];						      \

									      \

    /* Decomposing Hangul syllables not available in KS C 5601 into	      \

       Jamos should be considered either here or in euckr_from_ucs4() */      \

    euckr_from_ucs4 (ch, cp);						      \

									      \

    if (__builtin_expect (cp[0], '\1') == '\0' && ch != 0)		      \

      {									      \

	UNICODE_TAG_HANDLER (ch, 4);					      \

									      \

	/* Illegal character.  */					      \

	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \

      }									      \

									      \

    *outptr++ = cp[0];							      \

    /* Now test for a possible second byte and write this if possible.  */    \

    if (cp[1] != '\0')							      \

      {									      \

	if (__glibc_unlikely (outptr >= outend))			      \

	  {								      \

	    /* The result does not fit into the buffer.  */		      \

	    --outptr;							      \

	    result = __GCONV_FULL_OUTPUT;				      \

	    break;							      \

	  }								      \

	*outptr++ = cp[1];						      \

      }									      \

									      \

    inptr += 4;								      \

  }

#define LOOP_NEED_FLAGS

#include <iconv/loop.c>

/* Now define the toplevel functions.  */

#include <iconv/skeleton.c>