It was changed the prefix czech by chm
This commit is contained in:
fc_botelho
parent
e984385fa4
commit
2c79aa809a
@ -14,7 +14,7 @@ libcmph_la_SOURCES = debug.h\
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graph.h graph.c\
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cmph.h cmph.c\
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cmph_structs.h cmph_structs.c\
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czech.h czech_structs.h czech.c\
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chm.h chm_structs.h chm.c\
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bmz.h bmz_structs.h bmz.c
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libcmph_la_LDFLAGS = -version-info 0:0:0
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317
src/chm.c
Normal file
317
src/chm.c
Normal file
@ -0,0 +1,317 @@
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#include "graph.h"
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#include "chm.h"
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#include "cmph_structs.h"
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#include "chm_structs.h"
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#include "hash.h"
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#include "bitbool.h"
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <assert.h>
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#include <string.h>
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#include <netinet/in.h>
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//#define DEBUG
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#include "debug.h"
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/* static const char bitmask[8] = { 1, 1 << 1, 1 << 2, 1 << 3, 1 << 4, 1 << 5, 1 << 6, 1 << 7 }; */
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/* #define GETBIT(array, i) (array[(i) / 8] & bitmask[(i) % 8]) */
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/* #define SETBIT(array, i) (array[(i) / 8] |= bitmask[(i) % 8]) */
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/* #define UNSETBIT(array, i) (array[(i) / 8] &= (~(bitmask[(i) % 8]))) */
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static int chm_gen_edges(cmph_config_t *mph);
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static void chm_traverse(chm_config_data_t *chm, cmph_uint8 *visited, cmph_uint32 v);
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chm_config_data_t *chm_config_new(cmph_io_adapter_t *key_source)
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{
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chm_config_data_t *chm = NULL;
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chm = (chm_config_data_t *)malloc(sizeof(chm_config_data_t));
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chm->hashfuncs[0] = CMPH_HASH_JENKINS;
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chm->hashfuncs[1] = CMPH_HASH_JENKINS;
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chm->g = NULL;
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chm->graph = NULL;
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chm->hashes = NULL;
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assert(chm);
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return chm;
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}
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void chm_config_destroy(cmph_config_t *mph)
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{
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chm_config_data_t *data = (chm_config_data_t *)mph->data;
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DEBUGP("Destroying algorithm dependent data\n");
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free(data);
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}
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void chm_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs)
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{
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chm_config_data_t *chm = (chm_config_data_t *)mph->data;
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CMPH_HASH *hashptr = hashfuncs;
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cmph_uint32 i = 0;
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while(*hashptr != CMPH_HASH_COUNT)
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{
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if (i >= 2) break; //chm only uses two hash functions
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chm->hashfuncs[i] = *hashptr;
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++i, ++hashptr;
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}
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}
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cmph_t *chm_new(cmph_config_t *mph, float c)
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{
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cmph_t *mphf = NULL;
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chm_data_t *chmf = NULL;
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cmph_uint32 i;
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cmph_uint32 iterations = 20;
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cmph_uint8 *visited = NULL;
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chm_config_data_t *chm = (chm_config_data_t *)mph->data;
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chm->m = mph->key_source->nkeys;
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chm->n = ceil(c * mph->key_source->nkeys);
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DEBUGP("m (edges): %u n (vertices): %u c: %f\n", chm->m, chm->n, c);
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chm->graph = graph_new(chm->n, chm->m);
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DEBUGP("Created graph\n");
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chm->hashes = (hash_state_t **)malloc(sizeof(hash_state_t *)*3);
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for(i = 0; i < 3; ++i) chm->hashes[i] = NULL;
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//Mapping step
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if (mph->verbosity)
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{
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fprintf(stderr, "Entering mapping step for mph creation of %u keys with graph sized %u\n", chm->m, chm->n);
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}
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while(1)
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{
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int ok;
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chm->hashes[0] = hash_state_new(chm->hashfuncs[0], chm->n);
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chm->hashes[1] = hash_state_new(chm->hashfuncs[1], chm->n);
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ok = chm_gen_edges(mph);
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if (!ok)
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{
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--iterations;
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hash_state_destroy(chm->hashes[0]);
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chm->hashes[0] = NULL;
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hash_state_destroy(chm->hashes[1]);
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chm->hashes[1] = NULL;
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DEBUGP("%u iterations remaining\n", iterations);
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if (mph->verbosity)
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{
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fprintf(stderr, "Acyclic graph creation failure - %u iterations remaining\n", iterations);
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}
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if (iterations == 0) break;
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}
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else break;
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}
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if (iterations == 0)
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{
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graph_destroy(chm->graph);
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return NULL;
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}
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//Assignment step
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if (mph->verbosity)
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{
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fprintf(stderr, "Starting assignment step\n");
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}
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DEBUGP("Assignment step\n");
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visited = (char *)malloc(chm->n/8 + 1);
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memset(visited, 0, chm->n/8 + 1);
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free(chm->g);
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chm->g = malloc(chm->n * sizeof(cmph_uint32));
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assert(chm->g);
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for (i = 0; i < chm->n; ++i)
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{
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if (!GETBIT(visited,i))
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{
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chm->g[i] = 0;
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chm_traverse(chm, visited, i);
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}
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}
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graph_destroy(chm->graph);
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free(visited);
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chm->graph = NULL;
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mphf = (cmph_t *)malloc(sizeof(cmph_t));
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mphf->algo = mph->algo;
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chmf = (chm_data_t *)malloc(sizeof(chm_config_data_t));
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chmf->g = chm->g;
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chm->g = NULL; //transfer memory ownership
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chmf->hashes = chm->hashes;
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chm->hashes = NULL; //transfer memory ownership
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chmf->n = chm->n;
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chmf->m = chm->m;
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mphf->data = chmf;
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mphf->size = chm->m;
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DEBUGP("Successfully generated minimal perfect hash\n");
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if (mph->verbosity)
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{
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fprintf(stderr, "Successfully generated minimal perfect hash function\n");
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}
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return mphf;
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}
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static void chm_traverse(chm_config_data_t *chm, cmph_uint8 *visited, cmph_uint32 v)
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{
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graph_iterator_t it = graph_neighbors_it(chm->graph, v);
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cmph_uint32 neighbor = 0;
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SETBIT(visited,v);
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DEBUGP("Visiting vertex %u\n", v);
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while((neighbor = graph_next_neighbor(chm->graph, &it)) != GRAPH_NO_NEIGHBOR)
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{
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DEBUGP("Visiting neighbor %u\n", neighbor);
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if(GETBIT(visited,neighbor)) continue;
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DEBUGP("Visiting neighbor %u\n", neighbor);
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DEBUGP("Visiting edge %u->%u with id %u\n", v, neighbor, graph_edge_id(chm->graph, v, neighbor));
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chm->g[neighbor] = graph_edge_id(chm->graph, v, neighbor) - chm->g[v];
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DEBUGP("g is %u (%u - %u mod %u)\n", chm->g[neighbor], graph_edge_id(chm->graph, v, neighbor), chm->g[v], chm->m);
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chm_traverse(chm, visited, neighbor);
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}
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}
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static int chm_gen_edges(cmph_config_t *mph)
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{
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cmph_uint32 e;
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chm_config_data_t *chm = (chm_config_data_t *)mph->data;
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int cycles = 0;
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DEBUGP("Generating edges for %u vertices\n", chm->n);
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graph_clear_edges(chm->graph);
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mph->key_source->rewind(mph->key_source->data);
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for (e = 0; e < mph->key_source->nkeys; ++e)
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{
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cmph_uint32 h1, h2;
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cmph_uint32 keylen;
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char *key;
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mph->key_source->read(mph->key_source->data, &key, &keylen);
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h1 = hash(chm->hashes[0], key, keylen) % chm->n;
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h2 = hash(chm->hashes[1], key, keylen) % chm->n;
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if (h1 == h2) if (++h2 >= chm->n) h2 = 0;
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if (h1 == h2)
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{
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if (mph->verbosity) fprintf(stderr, "Self loop for key %e\n", e);
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mph->key_source->dispose(mph->key_source->data, key, keylen);
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return 0;
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}
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DEBUGP("Adding edge: %u -> %u for key %s\n", h1, h2, key);
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mph->key_source->dispose(mph->key_source->data, key, keylen);
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graph_add_edge(chm->graph, h1, h2);
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}
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cycles = graph_is_cyclic(chm->graph);
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if (mph->verbosity && cycles) fprintf(stderr, "Cyclic graph generated\n");
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DEBUGP("Looking for cycles: %u\n", cycles);
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return ! cycles;
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}
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int chm_dump(cmph_t *mphf, FILE *fd)
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{
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char *buf = NULL;
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cmph_uint32 buflen;
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cmph_uint32 nbuflen;
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cmph_uint32 i;
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cmph_uint32 two = htonl(2); //number of hash functions
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chm_data_t *data = (chm_data_t *)mphf->data;
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cmph_uint32 nn, nm;
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__cmph_dump(mphf, fd);
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fwrite(&two, sizeof(cmph_uint32), 1, fd);
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hash_state_dump(data->hashes[0], &buf, &buflen);
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DEBUGP("Dumping hash state with %u bytes to disk\n", buflen);
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nbuflen = htonl(buflen);
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fwrite(&nbuflen, sizeof(cmph_uint32), 1, fd);
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fwrite(buf, buflen, 1, fd);
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free(buf);
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hash_state_dump(data->hashes[1], &buf, &buflen);
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DEBUGP("Dumping hash state with %u bytes to disk\n", buflen);
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nbuflen = htonl(buflen);
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fwrite(&nbuflen, sizeof(cmph_uint32), 1, fd);
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fwrite(buf, buflen, 1, fd);
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free(buf);
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nn = htonl(data->n);
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fwrite(&nn, sizeof(cmph_uint32), 1, fd);
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nm = htonl(data->m);
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fwrite(&nm, sizeof(cmph_uint32), 1, fd);
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for (i = 0; i < data->n; ++i)
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{
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cmph_uint32 ng = htonl(data->g[i]);
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fwrite(&ng, sizeof(cmph_uint32), 1, fd);
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}
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#ifdef DEBUG
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fprintf(stderr, "G: ");
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for (i = 0; i < data->n; ++i) fprintf(stderr, "%u ", data->g[i]);
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fprintf(stderr, "\n");
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#endif
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return 1;
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}
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void chm_load(FILE *f, cmph_t *mphf)
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{
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cmph_uint32 nhashes;
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char fbuf[BUFSIZ];
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char *buf = NULL;
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cmph_uint32 buflen;
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cmph_uint32 i;
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hash_state_t *state;
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chm_data_t *chm = (chm_data_t *)malloc(sizeof(chm_data_t));
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DEBUGP("Loading chm mphf\n");
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mphf->data = chm;
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fread(&nhashes, sizeof(cmph_uint32), 1, f);
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nhashes = ntohl(nhashes);
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chm->hashes = (hash_state_t **)malloc(sizeof(hash_state_t *)*(nhashes + 1));
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chm->hashes[nhashes] = NULL;
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DEBUGP("Reading %u hashes\n", nhashes);
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for (i = 0; i < nhashes; ++i)
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{
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hash_state_t *state = NULL;
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fread(&buflen, sizeof(cmph_uint32), 1, f);
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buflen = ntohl(buflen);
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DEBUGP("Hash state has %u bytes\n", buflen);
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buf = (char *)malloc(buflen);
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fread(buf, buflen, 1, f);
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state = hash_state_load(buf, buflen);
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chm->hashes[i] = state;
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free(buf);
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}
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DEBUGP("Reading m and n\n");
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fread(&(chm->n), sizeof(cmph_uint32), 1, f);
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chm->n = ntohl(chm->n);
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fread(&(chm->m), sizeof(cmph_uint32), 1, f);
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chm->m = ntohl(chm->m);
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chm->g = (cmph_uint32 *)malloc(sizeof(cmph_uint32)*chm->n);
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fread(chm->g, chm->n*sizeof(cmph_uint32), 1, f);
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for (i = 0; i < chm->n; ++i) chm->g[i] = ntohl(chm->g[i]);
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#ifdef DEBUG
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fprintf(stderr, "G: ");
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for (i = 0; i < chm->n; ++i) fprintf(stderr, "%u ", chm->g[i]);
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fprintf(stderr, "\n");
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#endif
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return;
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}
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cmph_uint32 chm_search(cmph_t *mphf, const char *key, cmph_uint32 keylen)
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{
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chm_data_t *chm = mphf->data;
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cmph_uint32 h1 = hash(chm->hashes[0], key, keylen) % chm->n;
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cmph_uint32 h2 = hash(chm->hashes[1], key, keylen) % chm->n;
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DEBUGP("key: %s h1: %u h2: %u\n", key, h1, h2);
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if (h1 == h2 && ++h2 > chm->n) h2 = 0;
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DEBUGP("key: %s g[h1]: %u g[h2]: %u edges: %u\n", key, chm->g[h1], chm->g[h2], chm->m);
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return (chm->g[h1] + chm->g[h2]) % chm->m;
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}
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void chm_destroy(cmph_t *mphf)
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{
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chm_data_t *data = (chm_data_t *)mphf->data;
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free(data->g);
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hash_state_destroy(data->hashes[0]);
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hash_state_destroy(data->hashes[1]);
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free(data->hashes);
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free(data);
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free(mphf);
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}
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18
src/chm.h
Normal file
18
src/chm.h
Normal file
@ -0,0 +1,18 @@
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#ifndef __CMPH_CHM_H__
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#define __CMPH_CHM_H__
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#include "cmph.h"
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typedef struct __chm_data_t chm_data_t;
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typedef struct __chm_config_data_t chm_config_data_t;
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chm_config_data_t *chm_config_new(cmph_io_adapter_t *key_source);
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void chm_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs);
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void chm_config_destroy(cmph_config_t *mph);
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cmph_t *chm_new(cmph_config_t *mph, float c);
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void chm_load(FILE *f, cmph_t *mphf);
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int chm_dump(cmph_t *mphf, FILE *f);
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void chm_destroy(cmph_t *mphf);
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cmph_uint32 chm_search(cmph_t *mphf, const char *key, cmph_uint32 keylen);
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#endif
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24
src/chm_structs.h
Normal file
24
src/chm_structs.h
Normal file
@ -0,0 +1,24 @@
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#ifndef __CMPH_CHM_STRUCTS_H__
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#define __CMPH_CHM_STRUCTS_H__
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#include "hash_state.h"
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struct __chm_data_t
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{
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cmph_uint32 m; //edges (words) count
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cmph_uint32 n; //vertex count
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cmph_uint32 *g;
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hash_state_t **hashes;
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};
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struct __chm_config_data_t
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{
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CMPH_HASH hashfuncs[2];
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cmph_uint32 m; //edges (words) count
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cmph_uint32 n; //vertex count
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graph_t *graph;
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cmph_uint32 *g;
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hash_state_t **hashes;
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};
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#endif
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38
src/cmph.c
38
src/cmph.c
@ -1,6 +1,6 @@
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#include "cmph.h"
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#include "cmph_structs.h"
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#include "czech.h"
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#include "chm.h"
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#include "bmz.h"
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//#include "bmz.h" /* included -- Fabiano */
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@ -10,7 +10,7 @@
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//#define DEBUG
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#include "debug.h"
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const char *cmph_names[] = { "bmz", "czech", NULL }; /* included -- Fabiano */
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const char *cmph_names[] = { "bmz", "chm", NULL }; /* included -- Fabiano */
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static int key_nlfile_read(void *data, char **key, cmph_uint32 *keylen)
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{
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@ -97,7 +97,7 @@ cmph_config_t *cmph_config_new(cmph_io_adapter_t *key_source)
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cmph_config_t *mph = NULL;
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mph = __config_new(key_source);
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assert(mph);
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mph->algo = CMPH_CZECH; // default value
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mph->algo = CMPH_CHM; // default value
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return mph;
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}
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@ -111,8 +111,8 @@ void cmph_config_destroy(cmph_config_t *mph)
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DEBUGP("Destroying mph with algo %s\n", cmph_names[mph->algo]);
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switch (mph->algo)
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{
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case CMPH_CZECH:
|
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czech_config_destroy(mph);
|
||||
case CMPH_CHM:
|
||||
chm_config_destroy(mph);
|
||||
break;
|
||||
case CMPH_BMZ: /* included -- Fabiano */
|
||||
bmz_config_destroy(mph);
|
||||
@ -132,8 +132,8 @@ void cmph_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs)
|
||||
{
|
||||
switch (mph->algo)
|
||||
{
|
||||
case CMPH_CZECH:
|
||||
czech_config_set_hashfuncs(mph, hashfuncs);
|
||||
case CMPH_CHM:
|
||||
chm_config_set_hashfuncs(mph, hashfuncs);
|
||||
break;
|
||||
case CMPH_BMZ: /* included -- Fabiano */
|
||||
bmz_config_set_hashfuncs(mph, hashfuncs);
|
||||
@ -157,11 +157,11 @@ cmph_t *cmph_new(cmph_config_t *mph)
|
||||
DEBUGP("Creating mph with algorithm %s\n", cmph_names[mph->algo]);
|
||||
switch (mph->algo)
|
||||
{
|
||||
case CMPH_CZECH:
|
||||
DEBUGP("Creating czech hash\n");
|
||||
mph->data = czech_config_new(mph->key_source);
|
||||
case CMPH_CHM:
|
||||
DEBUGP("Creating chm hash\n");
|
||||
mph->data = chm_config_new(mph->key_source);
|
||||
if (c == 0) c = 2.09;
|
||||
mphf = czech_new(mph, c);
|
||||
mphf = chm_new(mph, c);
|
||||
break;
|
||||
case CMPH_BMZ: /* included -- Fabiano */
|
||||
DEBUGP("Creating bmz hash\n");
|
||||
@ -179,8 +179,8 @@ int cmph_dump(cmph_t *mphf, FILE *f)
|
||||
{
|
||||
switch (mphf->algo)
|
||||
{
|
||||
case CMPH_CZECH:
|
||||
return czech_dump(mphf, f);
|
||||
case CMPH_CHM:
|
||||
return chm_dump(mphf, f);
|
||||
break;
|
||||
case CMPH_BMZ: /* included -- Fabiano */
|
||||
return bmz_dump(mphf, f);
|
||||
@ -201,8 +201,8 @@ cmph_t *cmph_load(FILE *f)
|
||||
|
||||
switch (mphf->algo)
|
||||
{
|
||||
case CMPH_CZECH:
|
||||
czech_load(f, mphf);
|
||||
case CMPH_CHM:
|
||||
chm_load(f, mphf);
|
||||
break;
|
||||
case CMPH_BMZ: /* included -- Fabiano */
|
||||
DEBUGP("Loading bmz algorithm dependent parts\n");
|
||||
@ -221,8 +221,8 @@ cmph_uint32 cmph_search(cmph_t *mphf, const char *key, cmph_uint32 keylen)
|
||||
DEBUGP("mphf algorithm: %u \n", mphf->algo);
|
||||
switch(mphf->algo)
|
||||
{
|
||||
case CMPH_CZECH:
|
||||
return czech_search(mphf, key, keylen);
|
||||
case CMPH_CHM:
|
||||
return chm_search(mphf, key, keylen);
|
||||
case CMPH_BMZ: /* included -- Fabiano */
|
||||
DEBUGP("bmz algorithm search\n");
|
||||
return bmz_search(mphf, key, keylen);
|
||||
@ -242,8 +242,8 @@ void cmph_destroy(cmph_t *mphf)
|
||||
{
|
||||
switch(mphf->algo)
|
||||
{
|
||||
case CMPH_CZECH:
|
||||
czech_destroy(mphf);
|
||||
case CMPH_CHM:
|
||||
chm_destroy(mphf);
|
||||
return;
|
||||
case CMPH_BMZ: /* included -- Fabiano */
|
||||
bmz_destroy(mphf);
|
||||
|
||||
@ -8,7 +8,7 @@ typedef unsigned int cmph_uint32;
|
||||
typedef enum { CMPH_HASH_DJB2, CMPH_HASH_FNV, CMPH_HASH_GLIB, CMPH_HASH_JENKINS,
|
||||
CMPH_HASH_PJW, CMPH_HASH_SDBM, CMPH_HASH_COUNT } CMPH_HASH;
|
||||
extern const char *cmph_hash_names[];
|
||||
typedef enum { CMPH_BMZ, CMPH_CZECH, CMPH_COUNT } CMPH_ALGO; /* included -- Fabiano */
|
||||
typedef enum { CMPH_BMZ, CMPH_CHM, CMPH_COUNT } CMPH_ALGO; /* included -- Fabiano */
|
||||
extern const char *cmph_names[];
|
||||
|
||||
#endif
|
||||
|
||||
@ -54,7 +54,7 @@ int main(int argc, char **argv)
|
||||
CMPH_HASH *hashes = NULL;
|
||||
cmph_uint32 nhashes = 0;
|
||||
cmph_uint32 i;
|
||||
CMPH_ALGO mph_algo = CMPH_CZECH;
|
||||
CMPH_ALGO mph_algo = CMPH_CHM;
|
||||
float c = 2.09;
|
||||
cmph_config_t *config = NULL;
|
||||
cmph_t *mphf = NULL;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user