1  /*
       2  
       3  Copyright 2013 Free Software Foundation, Inc.
       4  
       5  This file is part of the GNU MP Library test suite.
       6  
       7  The GNU MP Library test suite is free software; you can redistribute it
       8  and/or modify it under the terms of the GNU General Public License as
       9  published by the Free Software Foundation; either version 3 of the License,
      10  or (at your option) any later version.
      11  
      12  The GNU MP Library test suite is distributed in the hope that it will be
      13  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
      14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
      15  Public License for more details.
      16  
      17  You should have received a copy of the GNU General Public License along with
      18  the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
      19  
      20  #include <stdlib.h>
      21  #include <stdio.h>
      22  #include <string.h>
      23  
      24  #include "testutils.h"
      25  
      26  #define MAX_WORDS 20
      27  #define MAX_WORD_SIZE 10
      28  
      29  static void
      30  dump_bytes (const char *label, const unsigned char *s, size_t n)
      31  {
      32    size_t i;
      33    fprintf (stderr, "%s:", label);
      34    for (i = 0; i < n; i++)
      35      {
      36        if (i && (i % 16) == 0)
      37  	fprintf (stderr, "\n");
      38        fprintf (stderr, " %02x", s[i]);
      39      }
      40    fprintf (stderr, "\n");
      41  }
      42  
      43  /* Tests both mpz_import and mpz_export. */
      44  void
      45  testmain (int argc, char **argv)
      46  {
      47    unsigned char input[MAX_WORDS * MAX_WORD_SIZE];
      48    unsigned char output[MAX_WORDS * MAX_WORD_SIZE + 2];
      49    size_t count, in_count, out_count, size;
      50    int endian, order;
      51  
      52    mpz_t a, res;
      53  
      54    mpz_init (a);
      55    mpz_init (res);
      56  
      57    for (size = 0; size <= MAX_WORD_SIZE; size++)
      58      for (count = 0; count <= MAX_WORDS; count++)
      59        for (endian = -1; endian <= 1; endian++)
      60  	for (order = -1; order <= 1; order += 2)
      61  	  {
      62  	    mini_rrandomb_export (a, input, &in_count,
      63  				  order, size, endian, size*count * 8);
      64  	    mpz_import (res, in_count, order, size, endian, 0, input);
      65  	    if (mpz_cmp (a, res))
      66  	      {
      67  		fprintf (stderr, "mpz_import failed:\n"
      68  			 "in_count %lu, out_count %lu, endian = %d, order = %d\n",
      69  			 (unsigned long) in_count, (unsigned long) out_count, endian, order);
      70  		dump ("a", a);
      71  		dump ("res", res);
      72  		abort ();
      73  	      }
      74  	    output[0] = 17;
      75  	    output[1+in_count*size] = 17;
      76  
      77  	    mpz_export (output+1, &out_count, order, size, endian, 0, a);
      78  	    if (out_count != in_count
      79  		|| memcmp (output+1, input, in_count * size)
      80  		|| output[0] != 17
      81  		|| output[1+in_count*size] != 17)
      82  	      {
      83  		fprintf (stderr, "mpz_export failed:\n"
      84  			 "in_count %lu, out_count %lu, endian = %d, order = %d\n",
      85  			 (unsigned long) in_count, (unsigned long) out_count, endian, order);
      86  		dump_bytes ("input", input, in_count * size);
      87  		dump_bytes ("output", output+1, out_count * size);
      88  		if (output[0] != 17)
      89  		  fprintf (stderr, "Overwrite at -1, value %02x\n", output[0]);
      90  		if (output[1+in_count*size] != 17)
      91  		  fprintf (stderr, "Overwrite at %lu, value %02x\n",
      92  			   (unsigned long) (in_count*size), output[1+in_count*size]);
      93  
      94  		abort ();
      95  	      }
      96  	  }
      97    mpz_clear (a);
      98    mpz_clear (res);
      99  }