btree/find.c

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#include <stdio.h>
#include <grass/btree.h>
 
int btree_find(const BTREE *B, const void *key, void **data)
{
    int q;
    int dir;
 
    if (B->N <= 0)
        return 0;
 
    q = 1;
    while (q > 0) {
        dir = (*B->cmp)(B->node[q].key, key);
        if (dir == 0) {
            *data = B->node[q].data;
            return 1;
        }
        if (dir > 0)
            q = B->node[q].left; /* go left */
        else
            q = B->node[q].right; /* go right */
    }
 
    return 0;
}