iconvdata/bug-iconv15.c

   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>