iconvdata/tst-e2big.c

   1 /* Test for a tricky E2BIG situation.
   2    Copyright (C) 2002-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Bruno Haible <bruno@clisp.org>, 2002.
   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 <alloca.h>
  21 #include <errno.h>
  22 #include <iconv.h>
  23 #include <stdbool.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 /* In EUC-JISX0213 and TSCII, a single input character can convert to
  28    a sequence of two or more Unicode characters.  When the output buffer
  29    has room for less Unicode characters than would be produced with an
  30    unconstrained output buffer, the conversion must give errno = E2BIG.  */
  31
  32 void
  33 test (const char *encoding, char *inbuf, size_t inbufsize, size_t outbufsize)
  34 {
  35   char *outbuf = alloca (outbufsize);
  36   iconv_t cd;
  37   char *inptr;
  38   size_t inlen;
  39   char *outptr;
  40   size_t outlen;
  41   int result;
  42   bool empty_input;
  43   bool empty_output;
  44
  45   cd = iconv_open ("UTF-8", encoding);
  46   if (cd == (iconv_t) -1)
  47     {
  48       fprintf (stderr, "cannot convert from %s\n", encoding);
  49       exit (1);
  50     }
  51
  52   inptr = inbuf;
  53   inlen = inbufsize;
  54   outptr = outbuf;
  55   outlen = outbufsize;
  56
  57   result = iconv (cd, &inptr, &inlen, &outptr, &outlen);
  58   if (!(result == -1 && errno == E2BIG))
  59     {
  60       fprintf (stderr, "%s: wrong iconv result: %d/%d (%m)\n",
  61                encoding, result, errno);
  62       exit (1);
  63     }
  64   empty_input = (inptr == inbuf && inlen == inbufsize);
  65   empty_output = (outptr == outbuf && outlen == outbufsize);
  66
  67   if (!empty_input && empty_output)
  68     {
  69       fprintf (stderr, "%s: ate %td input bytes\n", encoding, inptr - inbuf);
  70       exit (1);
  71     }
  72   if (empty_input && !empty_output)
  73     {
  74       fprintf (stderr, "%s: produced %td output bytes\n",
  75                encoding, outptr - outbuf);
  76       exit (1);
  77     }
  78
  79   iconv_close (cd);
  80 }
  81
  82 void
  83 test_euc_jisx0213 (void)
  84 {
  85   char inbuf[2] = { 0xa4, 0xf7 };
  86   test ("EUC-JISX0213", inbuf, sizeof (inbuf), 3);
  87 }
  88
  89 void
  90 test_tscii (void)
  91 {
  92   char inbuf[1] = { 0x82 };
  93   test ("TSCII", inbuf, sizeof (inbuf), 3);
  94   test ("TSCII", inbuf, sizeof (inbuf), 6);
  95   test ("TSCII", inbuf, sizeof (inbuf), 9);
  96 }
  97
  98 static int
  99 do_test (void)
 100 {
 101   test_euc_jisx0213 ();
 102   test_tscii ();
 103   return 0;
 104 }
 105
 106 #define TEST_FUNCTION do_test ()
 107 #include "../test-skeleton.c"