/* Test of u8_uctomb() function.

   Copyright (C) 2010-2017 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */

#include <config.h>

#include "unistr.h"

#include "macros.h"

#define MAGIC 0xBA

int

main ()

{

  /* Test ISO 646 character, in particular the NUL character.  */

  {

    ucs4_t uc;

    for (uc = 0; uc < 0x80; uc++)

      {

        uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };

        int ret;

        ret = u8_uctomb (buf, uc, 0);

        ASSERT (ret == -2);

        ASSERT (buf[0] == MAGIC);

        ret = u8_uctomb (buf, uc, 1);

        ASSERT (ret == 1);

        ASSERT (buf[0] == uc);

        ASSERT (buf[1] == MAGIC);

      }

  }

  /* Test 2-byte character.  */

  {

    ucs4_t uc = 0x00D7;

    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };

    int ret;

    ret = u8_uctomb (buf, uc, 0);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ret = u8_uctomb (buf, uc, 1);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ret = u8_uctomb (buf, uc, 2);

    ASSERT (ret == 2);

    ASSERT (buf[0] == 0xC3);

    ASSERT (buf[1] == 0x97);

    ASSERT (buf[2] == MAGIC);

  }

  /* Test 3-byte character.  */

  {

    ucs4_t uc = 0x20AC;

    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };

    int ret;

    ret = u8_uctomb (buf, uc, 0);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ret = u8_uctomb (buf, uc, 1);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ret = u8_uctomb (buf, uc, 2);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ASSERT (buf[1] == MAGIC);

    ret = u8_uctomb (buf, uc, 3);

    ASSERT (ret == 3);

    ASSERT (buf[0] == 0xE2);

    ASSERT (buf[1] == 0x82);

    ASSERT (buf[2] == 0xAC);

    ASSERT (buf[3] == MAGIC);

  }

  /* Test 4-byte character.  */

  {

    ucs4_t uc = 0x10FFFD;

    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };

    int ret;

    ret = u8_uctomb (buf, uc, 0);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ret = u8_uctomb (buf, uc, 1);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ret = u8_uctomb (buf, uc, 2);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ASSERT (buf[1] == MAGIC);

    ret = u8_uctomb (buf, uc, 3);

    ASSERT (ret == -2);

    ASSERT (buf[0] == MAGIC);

    ASSERT (buf[1] == MAGIC);

    ASSERT (buf[2] == MAGIC);

    ret = u8_uctomb (buf, uc, 4);

    ASSERT (ret == 4);

    ASSERT (buf[0] == 0xF4);

    ASSERT (buf[1] == 0x8F);

    ASSERT (buf[2] == 0xBF);

    ASSERT (buf[3] == 0xBD);

    ASSERT (buf[4] == MAGIC);

  }

  /* Test invalid characters.  */

  {

    ucs4_t invalid[] = { 0x110000, 0xD800, 0xDBFF, 0xDC00, 0xDFFF };

    uint8_t buf[5] = { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };

    size_t i;

    for (i = 0; i < SIZEOF (invalid); i++)

      {

        ucs4_t uc = invalid[i];

        int n;

        for (n = 0; n <= 4; n++)

          {

            int ret = u8_uctomb (buf, uc, n);

            ASSERT (ret == -1);

            ASSERT (buf[0] == MAGIC);

            ASSERT (buf[1] == MAGIC);

            ASSERT (buf[2] == MAGIC);

            ASSERT (buf[3] == MAGIC);

            ASSERT (buf[4] == MAGIC);

          }

      }

  }

  return 0;

}