turbonss/examples/vector_adapter_ex1.c

#include <cmph.h>
#include <string.h>
// Create minimal perfect hash function from in-memory vector
int main(int argc, char **argv)
{ 

    // Creating a filled vector
    unsigned int i = 0;
    const char *vector[] = {"aaaaaaaaaa", "bbbbbbbbbb", "cccccccccc", "dddddddddd", "eeeeeeeeee", 
        "ffffffffff", "gggggggggg", "hhhhhhhhhh", "iiiiiiiiii", "jjjjjjjjjj"};
    unsigned int nkeys = 10;
    FILE* mphf_fd = fopen("temp.mph", "wb");
    // Source of keys
    cmph_io_adapter_t *source = cmph_io_vector_adapter((char **)vector, nkeys);

    //Create minimal perfect hash function using the brz algorithm.
    cmph_config_t *config = cmph_config_new(source);
    cmph_config_set_algo(config, CMPH_BRZ);
    cmph_config_set_mphf_fd(config, mphf_fd);
    cmph_t *hash = cmph_new(config);
    cmph_config_destroy(config);
    cmph_dump(hash, mphf_fd); 
    cmph_destroy(hash);	
    fclose(mphf_fd);

    //Find key
    mphf_fd = fopen("temp.mph", "rb");
    hash = cmph_load(mphf_fd);
    while (i < nkeys) {
        const char *key = vector[i];
        unsigned int id = cmph_search(hash, key, (cmph_uint32)strlen(key));
        fprintf(stderr, "key:%s -- hash:%u\n", key, id);
        i++;
    }

    //Destroy hash
    cmph_destroy(hash);
    cmph_io_vector_adapter_destroy(source);   
    fclose(mphf_fd);
    return 0;
}