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turbonss/src/brz.c

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12 KiB
C
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#include "graph.h"
#include "bmz.h"
#include "bmz_structs.h"
#include "brz.h"
#include "cmph_structs.h"
#include "brz_structs.h"
#include "cmph.h"
#include "hash.h"
#include "bitbool.h"
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#define DEBUG
#include "debug.h"
static int brz_before_gen_graphs(cmph_config_t *mph, cmph_uint32 * disksize, cmph_uint32 * diskoffset);
static void brz_gen_graphs(cmph_config_t *mph, cmph_uint32 * disksize, cmph_uint32 * diskoffset, FILE * graphs_fd);
static char ** brz_read_keys_vd(FILE * graphs_fd, cmph_uint8 nkeys, cmph_uint32 h3);
static void brz_destroy_keys_vd(char ** keys_vd, cmph_uint8 nkeys);
static void brz_copy_partial_mphf(brz_config_data_t *brz, bmz_data_t * bmzf, cmph_uint32 index);
brz_config_data_t *brz_config_new()
{
brz_config_data_t *brz = NULL;
brz = (brz_config_data_t *)malloc(sizeof(brz_config_data_t));
brz->hashfuncs[0] = CMPH_HASH_JENKINS;
brz->hashfuncs[1] = CMPH_HASH_JENKINS;
brz->hashfuncs[2] = CMPH_HASH_JENKINS;
brz->size = NULL;
brz->offset = NULL;
brz->g = NULL;
brz->h1 = NULL;
brz->h2 = NULL;
brz->h3 = NULL;
assert(brz);
return brz;
}
void brz_config_destroy(cmph_config_t *mph)
{
brz_config_data_t *data = (brz_config_data_t *)mph->data;
DEBUGP("Destroying algorithm dependent data\n");
free(data);
}
void brz_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs)
{
brz_config_data_t *brz = (brz_config_data_t *)mph->data;
CMPH_HASH *hashptr = hashfuncs;
cmph_uint32 i = 0;
while(*hashptr != CMPH_HASH_COUNT)
{
if (i >= 3) break; //brz only uses three hash functions
brz->hashfuncs[i] = *hashptr;
++i, ++hashptr;
}
}
cmph_t *brz_new(cmph_config_t *mph, float c)
{
cmph_t *mphf = NULL;
brz_data_t *brzf = NULL;
cmph_uint32 i;
cmph_uint32 iterations = 20;
cmph_uint32 * disksize = NULL;
cmph_uint32 * diskoffset = NULL;
cmph_io_adapter_t *source = NULL;
cmph_config_t *config = NULL;
cmph_t *mphf_tmp = NULL;
char ** keys_vd = NULL;
FILE * graphs_fd = NULL;
DEBUGP("c: %f\n", c);
brz_config_data_t *brz = (brz_config_data_t *)mph->data;
brz->m = mph->key_source->nkeys;
DEBUGP("m: %u\n", brz->m);
brz->k = ceil(brz->m/128);
DEBUGP("k: %u\n", brz->k);
brz->size = (cmph_uint8 *) malloc(sizeof(cmph_uint8)*brz->k);
brz->offset = (cmph_uint32 *)malloc(sizeof(cmph_uint32)*brz->k);
disksize = (cmph_uint32 *)malloc(sizeof(cmph_uint32)*brz->k);
diskoffset = (cmph_uint32 *)malloc(sizeof(cmph_uint32)*brz->k);
for(i = 0; i < brz->k; ++i)
{
brz->size[i] = 0;
brz->offset[i] = 0;
disksize[i] = 0;
diskoffset[i] = 0;
}
// Creating the external graphs.
while(1)
{
int ok;
DEBUGP("hash function 3\n");
brz->h3 = hash_state_new(brz->hashfuncs[2], brz->k);
DEBUGP("Generating graphs\n");
ok = brz_before_gen_graphs(mph, disksize, diskoffset);
if (!ok)
{
--iterations;
hash_state_destroy(brz->h3);
brz->h3 = NULL;
DEBUGP("%u iterations remaining to create the graphs in a external file\n", iterations);
if (mph->verbosity)
{
fprintf(stderr, "Failure: A graph with more than 255 keys was created - %u iterations remaining\n", iterations);
}
if (iterations == 0) break;
}
else break;
}
if (iterations == 0)
{
DEBUGP("Graphs with more than 255 keys were created in all 20 iterations\n");
free(brz->size);
free(brz->offset);
free(disksize);
free(diskoffset);
return NULL;
}
graphs_fd = fopen("/colecao/fbotelho/cmph.tmp", "wb");
if (graphs_fd == NULL)
{
free(brz->size);
free(brz->offset);
free(disksize);
free(diskoffset);
fprintf(stderr, "Unable to open file %s\n", "/colecao/fbotelho/cmph.tmp");
return NULL;
}
// Clustering the keys by graph id.
brz_gen_graphs(mph, disksize, diskoffset, graphs_fd);
free(disksize);
free(diskoffset);
DEBUGP("Graphs generated\n");
fclose(graphs_fd);
graphs_fd = fopen("/colecao/fbotelho/cmph.tmp", "rb");
// codigo do algoritmo...
brz->h1 = (hash_state_t **)malloc(sizeof(hash_state_t *)*brz->k);
brz->h2 = (hash_state_t **)malloc(sizeof(hash_state_t *)*brz->k);
brz->g = (cmph_uint8 **) malloc(sizeof(cmph_uint8 *) *brz->k);
for(i = 0; i < brz->k; i++)
{
cmph_uint32 j;
bmz_data_t * bmzf = NULL;
if (brz->size[i] == 0) continue;
keys_vd = brz_read_keys_vd(graphs_fd, brz->size[i], i);
// Source of keys
source = cmph_io_vector_adapter(keys_vd, (cmph_uint32)brz->size[i]);
config = cmph_config_new(source);
cmph_config_set_algo(config, CMPH_BMZ);
cmph_config_set_graphsize(config, c);
mphf_tmp = cmph_new(config);
bmzf = (bmz_data_t *)mphf_tmp->data;
brz_copy_partial_mphf(brz, bmzf, i); // implementar
cmph_config_destroy(config);
brz_destroy_keys_vd(keys_vd, brz->size[i]);
free(keys_vd);
cmph_destroy(mphf_tmp);
free(source);
}
fclose(graphs_fd);
// Generating a mphf
mphf = (cmph_t *)malloc(sizeof(cmph_t));
mphf->algo = mph->algo;
brzf = (brz_data_t *)malloc(sizeof(brz_data_t));
brzf->g = brz->g;
brz->g = NULL; //transfer memory ownership
brzf->h1 = brz->h1;
brz->h1 = NULL; //transfer memory ownership
brzf->h2 = brz->h2;
brz->h2 = NULL; //transfer memory ownership
brzf->h3 = brz->h3;
brz->h3 = NULL; //transfer memory ownership
brzf->size = brz->size;
brz->size = NULL; //transfer memory ownership
brzf->offset = brz->offset;
brz->offset = NULL; //transfer memory ownership
brzf->k = brz->k;
brzf->m = brz->m;
mphf->data = brzf;
mphf->size = brz->m;
DEBUGP("Successfully generated minimal perfect hash\n");
if (mph->verbosity)
{
fprintf(stderr, "Successfully generated minimal perfect hash function\n");
}
return mphf;
}
static int brz_before_gen_graphs(cmph_config_t *mph, cmph_uint32 * disksize, cmph_uint32 * diskoffset)
{
cmph_uint32 e;
brz_config_data_t *brz = (brz_config_data_t *)mph->data;
mph->key_source->rewind(mph->key_source->data);
DEBUGP("Generating information before the keys partition\n");
for (e = 0; e < brz->m; ++e)
{
cmph_uint32 h3;
cmph_uint32 keylen;
char *key;
mph->key_source->read(mph->key_source->data, &key, &keylen);
h3 = hash(brz->h3, key, keylen) % brz->k;
if(h3 == 6)
{
DEBUGP("key = %s\n", key);
DEBUGP("keylen = %u\n", keylen + 1);
}
mph->key_source->dispose(mph->key_source->data, key, keylen);
if (brz->size[h3] == 255) return 0;
brz->size[h3] = brz->size[h3] + 1;
disksize[h3] = disksize[h3] + keylen + 1;
// if(h3 == 6)
// {
// DEBUGP("disksize[%u]=%u \n", h3, disksize[h3]);
// }
}
fprintf(stderr, "size:%u offset: %u\n", brz->size[0], brz->offset[0]);
for (e = 1; e < brz->k; ++e)
{
brz->offset[e] = brz->size[e-1] + brz->offset[e-1];
diskoffset[e] = disksize[e-1] + diskoffset[e-1];
DEBUGP("disksize[%u]=%u diskoffset[%u]: %u\n", e, disksize[e], e, diskoffset[e]);
DEBUGP("size[%u]=%u offset[%u]: %u\n", e, brz->size[e], e, brz->offset[e]);
}
return 1;
}
// disksize nao esta sendo usado ainda. Sera usado qd incluir os buffers.
static void brz_gen_graphs(cmph_config_t *mph, cmph_uint32 * disksize, cmph_uint32 * diskoffset, FILE * graphs_fd)
{
cmph_uint32 e;
brz_config_data_t *brz = (brz_config_data_t *)mph->data;
mph->key_source->rewind(mph->key_source->data);
DEBUGP("Generating graphs from %u keys\n", brz->m);
for (e = 0; e < brz->m; ++e)
{
cmph_uint32 h3;
cmph_uint32 keylen;
char *key;
mph->key_source->read(mph->key_source->data, &key, &keylen);
h3 = hash(brz->h3, key, keylen) % brz->k;
if(h3 == 6)
{
DEBUGP("key = %s\n", key);
DEBUGP("keylen = %u\n", keylen + 1);
}
fseek(graphs_fd, diskoffset[h3], SEEK_SET);
fwrite(key, sizeof(char), keylen + 1, graphs_fd);
if(h3 == 6)
{
DEBUGP("diskoffset[%u]=%u \n", h3, diskoffset[h3]);
}
diskoffset[h3] = diskoffset[h3] + keylen + 1;
mph->key_source->dispose(mph->key_source->data, key, keylen);
}
}
static char ** brz_read_keys_vd(FILE * graphs_fd, cmph_uint8 nkeys, cmph_uint32 h3)
{
char ** keys_vd = (char **)malloc(sizeof(char *)*nkeys);
cmph_uint8 i;
for(i = 0; i < nkeys; i++)
{
char * buf = (char *)malloc(BUFSIZ);
cmph_uint32 buf_pos = 0;
char c;
while(1)
{
fread(&c, sizeof(char), 1, graphs_fd);
buf[buf_pos++] = c;
if(c == '\0') break;
if(buf_pos % BUFSIZ == 0) buf = (char *)realloc(buf, buf_pos + BUFSIZ);
}
keys_vd[i] = (char *)malloc(strlen(buf) + 1);
strcpy(keys_vd[i], buf);
if(h3 == 6) DEBUGP("key = %s\n", keys_vd[i]);
free(buf);
}
return keys_vd;
}
static void brz_destroy_keys_vd(char ** keys_vd, cmph_uint8 nkeys)
{
cmph_uint8 i;
for(i = 0; i < nkeys; i++) free(keys_vd[i]);
}
static void brz_copy_partial_mphf(brz_config_data_t *brz, bmz_data_t * bmzf, cmph_uint32 index)
{
cmph_uint32 i;
brz->g[index] = (cmph_uint8 *)malloc(sizeof(cmph_uint8)*bmzf->m);
for(i = 0; i < bmzf->m; i++)
{
brz->g[index][i] = (cmph_uint8) bmzf->g[i];
}
brz->h1[index] = bmzf->hashes[0];
brz->h2[index] = bmzf->hashes[1];
}
int brz_dump(cmph_t *mphf, FILE *fd)
{
/*char *buf = NULL;
cmph_uint32 buflen;
cmph_uint32 nbuflen;
cmph_uint32 i;
cmph_uint32 two = 2; //number of hash functions
brz_data_t *data = (brz_data_t *)mphf->data;
cmph_uint32 nn, nm;
__cmph_dump(mphf, fd);
fwrite(&two, sizeof(cmph_uint32), 1, fd);
hash_state_dump(data->hashes[0], &buf, &buflen);
DEBUGP("Dumping hash state with %u bytes to disk\n", buflen);
fwrite(&buflen, sizeof(cmph_uint32), 1, fd);
fwrite(buf, buflen, 1, fd);
free(buf);
hash_state_dump(data->hashes[1], &buf, &buflen);
DEBUGP("Dumping hash state with %u bytes to disk\n", buflen);
fwrite(&buflen, sizeof(cmph_uint32), 1, fd);
fwrite(buf, buflen, 1, fd);
free(buf);
fwrite(&(data->n), sizeof(cmph_uint32), 1, fd);
fwrite(&(data->m), sizeof(cmph_uint32), 1, fd);
fwrite(data->g, sizeof(cmph_uint32)*(data->n), 1, fd);
#ifdef DEBUG
fprintf(stderr, "G: ");
for (i = 0; i < data->n; ++i) fprintf(stderr, "%u ", data->g[i]);
fprintf(stderr, "\n");
#endif
*/
return 1;
}
void brz_load(FILE *f, cmph_t *mphf)
{
/* cmph_uint32 nhashes;
char *buf = NULL;
cmph_uint32 buflen;
cmph_uint32 i;
brz_data_t *brz = (brz_data_t *)malloc(sizeof(brz_data_t));
DEBUGP("Loading brz mphf\n");
mphf->data = brz;
fread(&nhashes, sizeof(cmph_uint32), 1, f);
brz->hashes = (hash_state_t **)malloc(sizeof(hash_state_t *)*(nhashes + 1));
brz->hashes[nhashes] = NULL;
DEBUGP("Reading %u hashes\n", nhashes);
for (i = 0; i < nhashes; ++i)
{
hash_state_t *state = NULL;
fread(&buflen, sizeof(cmph_uint32), 1, f);
DEBUGP("Hash state has %u bytes\n", buflen);
buf = (char *)malloc(buflen);
fread(buf, buflen, 1, f);
state = hash_state_load(buf, buflen);
brz->hashes[i] = state;
free(buf);
}
DEBUGP("Reading m and n\n");
fread(&(brz->n), sizeof(cmph_uint32), 1, f);
fread(&(brz->m), sizeof(cmph_uint32), 1, f);
brz->g = (cmph_uint32 *)malloc(sizeof(cmph_uint32)*brz->n);
fread(brz->g, brz->n*sizeof(cmph_uint32), 1, f);
#ifdef DEBUG
fprintf(stderr, "G: ");
for (i = 0; i < brz->n; ++i) fprintf(stderr, "%u ", brz->g[i]);
fprintf(stderr, "\n");
#endif
return;
*/
}
cmph_uint32 brz_search(cmph_t *mphf, const char *key, cmph_uint32 keylen)
{
/* brz_data_t *brz = mphf->data;
cmph_uint32 h1 = hash(brz->hashes[0], key, keylen) % brz->n;
cmph_uint32 h2 = hash(brz->hashes[1], key, keylen) % brz->n;
DEBUGP("key: %s h1: %u h2: %u\n", key, h1, h2);
if (h1 == h2 && ++h2 > brz->n) h2 = 0;
DEBUGP("key: %s g[h1]: %u g[h2]: %u edges: %u\n", key, brz->g[h1], brz->g[h2], brz->m);
return brz->g[h1] + brz->g[h2];
*/
return 0;
}
void brz_destroy(cmph_t *mphf)
{
cmph_uint32 i;
brz_data_t *data = (brz_data_t *)mphf->data;
fprintf(stderr, "MERDAAAAAA %u\n", data->h3->hashfunc);
for(i = 0; i < data->k; i++)
{
free(data->g[i]);
fprintf(stderr, "MERDAAAAAA1 %u\n", data->h3->hashfunc);
hash_state_destroy(data->h1[i]);
fprintf(stderr, "MERDAAAAAA2 %u\n", data->h3->hashfunc);
hash_state_destroy(data->h2[i]);
fprintf(stderr, "MERDAAAAAA3 %u\n", data->h3->hashfunc);
}
fprintf(stderr, "MERDAAAAAA %u\n", data->h3->hashfunc);
hash_state_destroy(data->h3);
fprintf(stderr, "MERDAAAAAA1FAB\n");
free(data->g);
free(data->h1);
free(data->h2);
free(data->size);
free(data->offset);
free(data);
free(mphf);
}
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