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       bsearch.c - scc - simple c99 compiler
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       ---
       bsearch.c (525B)
       ---
            1 #include <stdint.h>
            2 #include <stdlib.h>
            3 
            4 void *
            5 bsearch(const void *key, const void *ary, size_t n, size_t size,
            6         int (*cmp)(const void *, const void *))
            7 {
            8         int t;
            9         size_t mid, low, high;
           10         char *cur, *base = (char *) ary;
           11 
           12         low = 0;
           13         high = n - 1;
           14         while (low <= high) {
           15                 mid = low + (high - low) / 2;
           16                 cur = base + mid*size;
           17 
           18                 if ((t = (*cmp)(key, cur)) == 0)
           19                         return cur;
           20                 else if (t > 0 && mid < SIZE_MAX)
           21                         low = mid + 1;
           22                 else if (t < 0 && mid > 0)
           23                         high = mid - 1;
           24                 else
           25                         break;
           26         }
           27 
           28         return NULL;
           29 }