/* Mapping tables for EUC-TW handling.

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

   This file is part of the GNU C Library.

   Contributed by 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 <cns11643l1.h>

#include <cns11643.h>

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

#define CHARSET_NAME		"EUC-TW//"

#define FROM_LOOP		from_euc_tw

#define TO_LOOP			to_euc_tw

#define DEFINE_INIT		1

#define DEFINE_FINI		1

#define MIN_NEEDED_FROM		1

#define MAX_NEEDED_FROM		4

#define MIN_NEEDED_TO		4

#define ONE_DIRECTION		0

/* First define the conversion function from EUC-TW 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 <= 0x7f)							      \

      /* Plain ASCII.  */						      \

      ++inptr;								      \

    else if ((ch <= 0xa0 || ch > 0xfe) && ch != 0x8e)			      \

      {									      \

	/* This is illegal.  */						      \

	STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \

      }									      \

    else								      \

      {									      \

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

	   is also available.  */					      \

	uint32_t ch2;							      \

									      \

	if (inptr + 1 >= inend)						      \

	  {								      \

	    /* The second byte is not available.  Store the intermediate      \

	       result.  */						      \

	    result = __GCONV_INCOMPLETE_INPUT;				      \

	    break;							      \

	  }								      \

									      \

	ch2 = *(inptr + 1);						      \

									      \

	/* All second bytes of a multibyte character must be >= 0xa1. */      \

	if (ch2 < 0xa1 || ch2 == 0xff)					      \

	  STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \

									      \

	if (ch == 0x8e)							      \

	  {								      \

	    /* This is code set 2: CNS 11643, planes 1 to 16.  */	      \

	    const unsigned char *endp = inptr + 1;			      \

									      \

	    ch = cns11643_to_ucs4 (&endp, inend - inptr - 1, 0x80);	      \

									      \

	    if (ch == 0)						      \

	      {								      \

		/* The third or fourth byte is not available.  Store	      \

		   the intermediate result.  */				      \

		result = __GCONV_INCOMPLETE_INPUT;			      \

		break;							      \

	      }								      \

									      \

	    if (ch == __UNKNOWN_10646_CHAR)				      \

	      /* Illegal input.  */					      \

	      STANDARD_FROM_LOOP_ERR_HANDLER (1);			      \

									      \

	    inptr += 4;							      \

	  }								      \

	else								      \

	  {								      \

	    /* This is code set 1: CNS 11643, plane 1.  */		      \

	    const unsigned char *endp = inptr;				      \

									      \

	    ch = cns11643l1_to_ucs4 (&endp, inend - inptr, 0x80);	      \

	    /* Please note that we need not test for the missing input	      \

	       characters here anymore.  */				      \

	    if (ch == __UNKNOWN_10646_CHAR)				      \

	      /* Illegal input.  */					      \

	      STANDARD_FROM_LOOP_ERR_HANDLER (2);			      \

									      \

	    inptr += 2;							      \

	  }								      \

      }									      \

									      \

    put32 (outptr, ch);							      \

    outptr += 4;							      \

  }

#define LOOP_NEED_FLAGS

#define ONEBYTE_BODY \

  {									      \

    if (c < 0x80)							      \

      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);					      \

									      \

    if (ch <= 0x7f)							      \

      /* It's plain ASCII.  */						      \

      *outptr++ = ch;							      \

    else								      \

      {									      \

	/* Try the CNS 11643 planes.  */				      \

	size_t found;							      \

									      \

	found = ucs4_to_cns11643l1 (ch, outptr, outend - outptr);	      \

	if (__builtin_expect (found, 1) == 0)				      \

	  {								      \

	    /* We ran out of space.  */					      \

	    result = __GCONV_FULL_OUTPUT;				      \

	    break;							      \

	  }								      \

	if (__builtin_expect (found, 1) != __UNKNOWN_10646_CHAR)	      \

	  {								      \

	    /* It's a CNS 11643, plane 1 character, adjust it for EUC-TW.  */ \

	    *outptr++ += 0x80;						      \

	    *outptr++ += 0x80;						      \

	  }								      \

	else								      \

	  {								      \

	    /* No CNS 11643, plane 1 character.  */			      \

									      \

	    found = ucs4_to_cns11643 (ch, outptr + 1, outend - outptr - 1);   \

	    if (__builtin_expect (found, 1) == 0)			      \

	      {								      \

		/* We ran out of space.  */				      \

		result = __GCONV_FULL_OUTPUT;				      \

		break;							      \

	      }								      \

	    if (__builtin_expect (found, 0) == __UNKNOWN_10646_CHAR)	      \

	      {								      \

		UNICODE_TAG_HANDLER (ch, 4);				      \

									      \

		/* Illegal character.  */				      \

		STANDARD_TO_LOOP_ERR_HANDLER (4);			      \

	      }								      \

									      \

	    /* It's a CNS 11643 character, adjust it for EUC-TW.  */	      \

	    *outptr++ = '\x8e';						      \

	    *outptr++ += 0xa0;						      \

	    *outptr++ += 0x80;						      \

	    *outptr++ += 0x80;						      \

	  }								      \

      }									      \

									      \

    inptr += 4;								      \

  }

#define LOOP_NEED_FLAGS

#include <iconv/loop.c>

/* Now define the toplevel functions.  */

#include <iconv/skeleton.c>