Home | History | Annotate | Line # | Download | only in mpn
t-scan.c revision 1.1 
      1 /* Test mpn_scan0 and mpn_scan1.
      2 
      3 Copyright 2002 Free Software Foundation, Inc.
      4 
      5 This file is part of the GNU MP Library.
      6 
      7 The GNU MP Library is free software; you can redistribute it and/or modify
      8 it under the terms of the GNU Lesser General Public License as published by
      9 the Free Software Foundation; either version 3 of the License, or (at your
     10 option) any later version.
     11 
     12 The GNU MP Library is distributed in the hope that it will be useful, but
     13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     14 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
     15 License for more details.
     16 
     17 You should have received a copy of the GNU Lesser General Public License
     18 along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
     19 
     20 #include <stdio.h>
     21 #include <stdlib.h>
     22 
     23 #include "gmp.h"
     24 #include "gmp-impl.h"
     25 
     26 #include "tests.h"
     27 
     28 
     29 #define SIZE  ((mp_size_t) 3)
     30 mp_limb_t  x[SIZE+1];
     31 
     32 void
     33 check (void)
     34 {
     35   unsigned long  i, got, want;
     36 
     37   x[SIZE] = 1;
     38   for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
     39     {
     40       got = refmpn_scan1 (x, i);
     41       want = mpn_scan1 (x, i);
     42       if (got != want)
     43         {
     44           printf ("mpn_scan1\n");
     45           printf ("  i     %lu\n", i);
     46           printf ("  got   %lu\n", got);
     47           printf ("  want  %lu\n", want);
     48           mpn_trace ("  x    ", x, SIZE);
     49           abort ();
     50         }
     51     }
     52 
     53   x[SIZE] = 0;
     54   for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
     55     {
     56       got = refmpn_scan0 (x, i);
     57       want = mpn_scan0 (x, i);
     58       if (got != want)
     59         {
     60           printf ("mpn_scan0\n");
     61           printf ("  i     %lu\n", i);
     62           printf ("  got   %lu\n", got);
     63           printf ("  want  %lu\n", want);
     64           mpn_trace ("  x    ", x, SIZE);
     65           abort ();
     66         }
     67     }
     68 }
     69 
     70 void
     71 check_twobits (void)
     72 {
     73 #define TWOBITS(a, b) \
     74   ((CNST_LIMB(1) << (a)) | (CNST_LIMB(1) << (b)))
     75 
     76   refmpn_zero (x, SIZE);
     77   x[0] = TWOBITS (1, 0);
     78   check ();
     79 
     80   refmpn_zero (x, SIZE);
     81   x[0] = TWOBITS (GMP_NUMB_BITS-1, 1);
     82   check ();
     83 
     84   refmpn_zero (x, SIZE);
     85   x[0] = CNST_LIMB(1);
     86   x[1] = CNST_LIMB(1);
     87   check ();
     88 
     89   refmpn_zero (x, SIZE);
     90   x[0] = CNST_LIMB(1) << (GMP_NUMB_BITS-1);
     91   x[1] = CNST_LIMB(1);
     92   check ();
     93 
     94   refmpn_zero (x, SIZE);
     95   x[1] = TWOBITS (1, 0);
     96   check ();
     97 
     98   refmpn_zero (x, SIZE);
     99   x[1] = CNST_LIMB(1);
    100   x[2] = CNST_LIMB(1);
    101   check ();
    102 }
    103 
    104 /* This is unused, it takes too long, especially on 64-bit systems. */
    105 void
    106 check_twobits_exhaustive (void)
    107 {
    108   unsigned long  i, j;
    109 
    110   for (i = 0; i < GMP_NUMB_BITS * SIZE; i++)
    111     {
    112       for (j = 0; j < GMP_NUMB_BITS * SIZE; j++)
    113         {
    114           refmpn_zero (x, SIZE);
    115           refmpn_setbit (x, i);
    116           refmpn_setbit (x, j);
    117           check ();
    118         }
    119     }
    120 }
    121 
    122 void
    123 check_rand (void)
    124 {
    125   int  i;
    126 
    127   for (i = 0; i < 100; i++)
    128     {
    129       refmpn_random2 (x, SIZE);
    130       check ();
    131     }
    132 }
    133 
    134 int
    135 main (void)
    136 {
    137   mp_trace_base = -16;
    138   tests_start ();
    139 
    140   check_twobits ();
    141   check_rand ();
    142 
    143   tests_end ();
    144   exit (0);
    145 }
    146