src/sequence/sequence.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

#include <stdlib.h>
#include <string.h>

#include "../core/index.h"

#include "sequence.h"

/* See "sequence.h" */
/*@
   requires
   (
      \valid(sequence_a+ (0 .. sequence_a_length))
      || (sequence_a_length == 0)
   );

   requires
   (
      \valid(sequence_b+ (0 .. sequence_b_length))
      || (sequence_b_length == 0)
   );

   assigns \result;
@*/
int JH_sequence_cmp
(
   const JH_index sequence_a [const restrict static 1],
   const JH_index sequence_b [const restrict static 1],
   const JH_index length
)
{
   JH_index i, a, b;

   for (i = 0; i < length; ++i)
   {
      a = sequence_a[i];
      b = sequence_b[i];

      if (a < b)
      {
         return -1;
      }
      else if (a > b)
      {
         return 1;
      }
   }

   return 0;
}