/* Generic conversion to and from 8bit charsets,

   converting from UCS using gaps.

   Copyright (C) 1997-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.

   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>

struct gap

{

  uint16_t start;

  uint16_t end;

  int32_t idx;

};

/* Now we can include the tables.  */

#include TABLES

#ifndef NONNUL

# define NONNUL(c)	((c) != '\0')

#endif

#define FROM_LOOP		from_gap

#define TO_LOOP			to_gap

#define DEFINE_INIT		1

#define DEFINE_FINI		1

#define MIN_NEEDED_FROM		1

#define MIN_NEEDED_TO		4

#define ONE_DIRECTION		0

/* First define the conversion function from the 8bit charset to UCS4.  */

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM

#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO

#define LOOPFCT			FROM_LOOP

#define BODY \

  {									      \

    uint32_t ch = to_ucs4[*inptr];					      \

									      \

    if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (*inptr))    \

      {									      \

	/* This is an illegal character.  */				      \

	STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \

      }									      \

    else								      \

      {									      \

	put32 (outptr, ch);						      \

	outptr += 4;							      \

      }									      \

									      \

    ++inptr;								      \

  }

#define LOOP_NEED_FLAGS

#define ONEBYTE_BODY \

  {									      \

    uint32_t ch = to_ucs4[c];						      \

									      \

    if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && NONNUL (c))	      \

      return WEOF;							      \

    else								      \

      return ch;							      \

  }

#include <iconv/loop.c>

/* Next, define the other direction.  */

#define MIN_NEEDED_INPUT	MIN_NEEDED_TO

#define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM

#define LOOPFCT			TO_LOOP

#define BODY \

  {									      \

    const struct gap *rp = from_idx;					      \

    uint32_t ch = get32 (inptr);					      \

    unsigned char res;							      \

									      \

    if (__glibc_unlikely (ch >= 0xffff))				      \

      {									      \

	UNICODE_TAG_HANDLER (ch, 4);					      \

	rp = NULL;							      \

      }									      \

    else								      \

      while (ch > rp->end)						      \

	++rp;								      \

    if (__builtin_expect (rp == NULL, 0)				      \

	|| __builtin_expect (ch < rp->start, 0)				      \

	|| (res = from_ucs4[ch + rp->idx],				      \

	    __builtin_expect (res, '\1') == '\0' && ch != 0))		      \

      {									      \

	/* This is an illegal character.  */				      \

	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \

      }									      \

									      \

    *outptr++ = res;							      \

    inptr += 4;								      \

  }

#define LOOP_NEED_FLAGS

#include <iconv/loop.c>

/* Now define the toplevel functions.  */

#include <iconv/skeleton.c>