/* Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Bruno Haible <haible@clisp.cons.org>, 2000.

   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/>.  */

/* Create a table from Unicode to CHARSET.

   This is a good test for CHARSET's iconv() module, in particular the

   TO_LOOP BODY macro.  */

#include <stddef.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <iconv.h>

#include <errno.h>

int

main (int argc, char *argv[])

{

  const char *charset;

  iconv_t cd;

  int bmp_only;

  if (argc != 2)

    {

      fprintf (stderr, "Usage: tst-table-to charset\n");

      return 1;

    }

  charset = argv[1];

  cd = iconv_open (charset, "UTF-8");

  if (cd == (iconv_t)(-1))

    {

      perror ("iconv_open");

      return 1;

    }

  /* When testing UTF-8 or GB18030, stop at 0x10000, otherwise the output

     file gets too big.  */

  bmp_only = (strcmp (charset, "UTF-8") == 0

	      || strcmp (charset, "GB18030") == 0);

  {

    unsigned int i;

    unsigned char buf[10];

    for (i = 0; i < (bmp_only ? 0x10000 : 0x30000); i++)

      {

	unsigned char in[6];

	unsigned int incount =

	  (i < 0x80 ? (in[0] = i, 1)

	   : i < 0x800 ? (in[0] = 0xc0 | (i >> 6),

			  in[1] = 0x80 | (i & 0x3f), 2)

	   : i < 0x10000 ? (in[0] = 0xe0 | (i >> 12),

			    in[1] = 0x80 | ((i >> 6) & 0x3f),

			    in[2] = 0x80 | (i & 0x3f), 3)

	   : /* i < 0x200000 */ (in[0] = 0xf0 | (i >> 18),

				 in[1] = 0x80 | ((i >> 12) & 0x3f),

				 in[2] = 0x80 | ((i >> 6) & 0x3f),

				 in[3] = 0x80 | (i & 0x3f), 4));

	const char *inbuf = (const char *) in;

	size_t inbytesleft = incount;

	char *outbuf = (char *) buf;

	size_t outbytesleft = sizeof (buf);

	size_t result;

	size_t result2 = 0;

	iconv (cd, NULL, NULL, NULL, NULL);

	result = iconv (cd,

			(char **) &inbuf, &inbytesleft,

			&outbuf, &outbytesleft);

	if (result != (size_t)(-1))

	  result2 = iconv (cd, NULL, NULL, &outbuf, &outbytesleft);

	if (result == (size_t)(-1) || result2 == (size_t)(-1))

	  {

	    if (errno != EILSEQ)

	      {

		int saved_errno = errno;

		fprintf (stderr, "0x%02X: iconv error: ", i);

		errno = saved_errno;

		perror ("");

		return 1;

	      }

	  }

	else if (result == 0) /* ignore conversions with transliteration */

	  {

	    unsigned int j, jmax;

	    if (inbytesleft != 0 || outbytesleft == sizeof (buf))

	      {

		fprintf (stderr, "0x%02X: inbytes = %ld, outbytes = %ld\n", i,

			 (long) (incount - inbytesleft),

			 (long) (sizeof (buf) - outbytesleft));

		return 1;

	      }

	    jmax = sizeof (buf) - outbytesleft;

	    printf ("0x");

	    for (j = 0; j < jmax; j++)

	      printf ("%02X", buf[j]);

	    printf ("\t0x%04X\n", i);

	  }

      }

  }

  if (iconv_close (cd) < 0)

    {

      perror ("iconv_close");

      return 1;

    }

  if (ferror (stdin) || fflush (stdout) || ferror (stdout))

    {

      fprintf (stderr, "I/O error\n");

      return 1;

    }

  return 0;

}