#ifndef SHA1_ARRAY_H
#define SHA1_ARRAY_H

struct sha1_array {
        unsigned char (*sha1)[20];
        int nr;
        int alloc;
        int sorted;
};

#define SHA1_ARRAY_INIT { NULL, 0, 0, 0 }

void sha1_array_append(struct sha1_array *array, const unsigned char *sha1);
int sha1_array_lookup(struct sha1_array *array, const unsigned char *sha1);
void sha1_array_clear(struct sha1_array *array);

typedef int (*for_each_sha1_fn)(const unsigned char sha1[20],
                                void *data);
int sha1_array_for_each_unique(struct sha1_array *array,
                               for_each_sha1_fn fn,
                               void *data);

#endif /* SHA1_ARRAY_H */