1  /* bug 19432: iconv rejects redundant escape sequences in IBM903,
       2                IBM905, IBM907, and IBM909
       3  
       4     Copyright (C) 2016-2023 Free Software Foundation, Inc.
       5     This file is part of the GNU C Library.
       6  
       7     The GNU C Library is free software; you can redistribute it and/or
       8     modify it under the terms of the GNU Lesser General Public
       9     License as published by the Free Software Foundation; either
      10     version 2.1 of the License, or (at your option) any later version.
      11  
      12     The GNU C Library is distributed in the hope that it will be useful,
      13     but WITHOUT ANY WARRANTY; without even the implied warranty of
      14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15     Lesser General Public License for more details.
      16  
      17     You should have received a copy of the GNU Lesser General Public
      18     License along with the GNU C Library; if not, see
      19     <https://www.gnu.org/licenses/>.  */
      20  
      21  #include <iconv.h>
      22  #include <stdio.h>
      23  #include <stdlib.h>
      24  #include <string.h>
      25  #include <errno.h>
      26  #include <limits.h>
      27  
      28  // The longest test input sequence.
      29  #define MAXINBYTES    8
      30  #define MAXOUTBYTES   (MAXINBYTES * MB_LEN_MAX)
      31  
      32  /* Verify that a conversion of the INPUT sequence consisting of
      33     INBYTESLEFT bytes in the encoding specified by the codeset
      34     named by FROM_SET is successful.
      35     Return 0 on success, non-zero on iconv() failure.  */
      36  
      37  static int
      38  test_ibm93x (const char *from_set, const char *input, size_t inbytesleft)
      39  {
      40    const char to_set[] = "UTF-8";
      41    iconv_t cd = iconv_open (to_set, from_set);
      42    if (cd == (iconv_t) -1)
      43      {
      44        printf ("iconv_open(\"%s\", \"%s\"): %s\n",
      45                from_set, to_set, strerror (errno));
      46        return 1;
      47      }
      48  
      49    char output [MAXOUTBYTES];
      50    size_t outbytesleft = sizeof output;
      51  
      52    char *inbuf = (char*)input;
      53    char *outbuf = output;
      54  
      55    printf ("iconv(cd, %p, %zu, %p, %zu)\n",
      56            inbuf, inbytesleft, outbuf, outbytesleft);
      57  
      58    errno = 0;
      59    size_t ret = iconv (cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
      60    printf ("  ==> %zu: %s\n"
      61            "  inbuf%+td, inbytesleft=%zu, outbuf%+td, outbytesleft=%zu\n",
      62            ret, strerror (errno),
      63            inbuf - input, inbytesleft, outbuf - output, outbytesleft);
      64  
      65    // Return 0 on success, non-zero on iconv() failure.
      66    return ret == (size_t)-1 || errno;
      67  }
      68  
      69  static int
      70  do_test (void)
      71  {
      72    // State-dependent encodings to exercise.
      73    static const char* const to_code[] = {
      74      "IBM930", "IBM933", "IBM935", "IBM937", "IBM939"
      75    };
      76  
      77    static const size_t ncodesets = sizeof to_code / sizeof *to_code;
      78  
      79    static const struct {
      80      char txt[MAXINBYTES];
      81      size_t len;
      82    } input[] = {
      83  #define DATA(s) { s, sizeof s - 1 }
      84      /* <SI>: denotes the shift-in 1-byte escape sequence, changing
      85               the encoder from a sigle-byte encoding to multibyte
      86         <SO>: denotes the shift-out 1-byte escape sequence, switching
      87               the encoder from a multibyte to a single-byte state  */
      88  
      89      DATA ("\x0e"),               // <SI> (not redundant)
      90      DATA ("\x0f"),               // <S0> (redundant with initial state)
      91      DATA ("\x0e\x0e"),           // <SI><SI>
      92      DATA ("\x0e\x0f\x0f"),       // <SI><SO><SO>
      93      DATA ("\x0f\x0f"),           // <SO><SO>
      94      DATA ("\x0f\x0e\x0e"),       // <SO><SI><SI>
      95      DATA ("\x0e\x0f\xc7\x0f"),   // <SI><SO><G><SO>
      96      DATA ("\xc7\x0f")            // <G><SO> (redundant with initial state)
      97    };
      98  
      99    static const size_t ninputs = sizeof input / sizeof *input;
     100  
     101    int ret = 0;
     102  
     103    size_t i, j;
     104  
     105    /* Iterate over the IBM93x codesets above and exercise each with
     106       the input sequences above.  */
     107    for (i = 0; i != ncodesets; ++i)
     108      for (j = 0; j != ninputs; ++j)
     109        ret += test_ibm93x (to_code [i], input [i].txt, input [i].len);
     110  
     111    return ret;
     112  }
     113  
     114  #define TEST_FUNCTION do_test ()
     115  #include "../test-skeleton.c"