1  /* Bug 28524: Conversion from ISO-2022-JP-3 with iconv
       2     may emit spurious NUL character on state reset.
       3     Copyright The GNU Toolchain Authors.
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include <stddef.h>
      21  #include <iconv.h>
      22  #include <support/check.h>
      23  
      24  static int
      25  do_test (void)
      26  {
      27    char in[] = "\x1b(I";
      28    char *inbuf = in;
      29    size_t inleft = sizeof (in) - 1;
      30    char out[1];
      31    char *outbuf = out;
      32    size_t outleft = sizeof (out);
      33    iconv_t cd;
      34  
      35    cd = iconv_open ("UTF8", "ISO-2022-JP-3");
      36    TEST_VERIFY_EXIT (cd != (iconv_t) -1);
      37  
      38    /* First call to iconv should alter internal state.
      39       Now, JISX0201_Kana_set is selected and
      40       state value != ASCII_set.  */
      41    TEST_VERIFY (iconv (cd, &inbuf, &inleft, &outbuf, &outleft) != (size_t) -1);
      42  
      43    /* No bytes should have been added to
      44       the output buffer at this point.  */
      45    TEST_VERIFY (outbuf == out);
      46    TEST_VERIFY (outleft == sizeof (out));
      47  
      48    /* Second call shall emit spurious NUL character in unpatched glibc.  */
      49    TEST_VERIFY (iconv (cd, NULL, NULL, &outbuf, &outleft) != (size_t) -1);
      50  
      51    /* No characters are expected to be produced.  */
      52    TEST_VERIFY (outbuf == out);
      53    TEST_VERIFY (outleft == sizeof (out));
      54  
      55    TEST_VERIFY_EXIT (iconv_close (cd) != -1);
      56  
      57    return 0;
      58  }
      59  
      60  #include <support/test-driver.c>