42 lines
1.3 KiB
C
Executable File
42 lines
1.3 KiB
C
Executable File
#include <cmph.h>
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#include <string.h>
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// Create minimal perfect hash function from in-memory vector
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int main(int argc, char **argv)
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{
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// Creating a filled vector
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unsigned int i = 0;
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const char *vector[] = {"aaaaaaaaaa", "bbbbbbbbbb", "cccccccccc", "dddddddddd", "eeeeeeeeee",
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"ffffffffff", "gggggggggg", "hhhhhhhhhh", "iiiiiiiiii", "jjjjjjjjjj"};
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unsigned int nkeys = 10;
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FILE* mphf_fd = fopen("temp.mph", "wb");
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// Source of keys
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cmph_io_adapter_t *source = cmph_io_vector_adapter((char **)vector, nkeys);
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//Create minimal perfect hash function using the brz algorithm.
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cmph_config_t *config = cmph_config_new(source);
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cmph_config_set_algo(config, CMPH_BRZ);
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cmph_config_set_mphf_fd(config, mphf_fd);
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cmph_t *hash = cmph_new(config);
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cmph_config_destroy(config);
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cmph_dump(hash, mphf_fd);
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cmph_destroy(hash);
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fclose(mphf_fd);
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//Find key
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mphf_fd = fopen("temp.mph", "rb");
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hash = cmph_load(mphf_fd);
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while (i < nkeys) {
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const char *key = vector[i];
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unsigned int id = cmph_search(hash, key, (cmph_uint32)strlen(key));
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fprintf(stderr, "key:%s -- hash:%u\n", key, id);
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i++;
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}
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//Destroy hash
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cmph_destroy(hash);
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cmph_io_vector_adapter_destroy(source);
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fclose(mphf_fd);
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return 0;
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}
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