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Stable version of BRZ algorithm with option -M (memory_availability)

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This commit is contained in:
fc_botelho 2005-09-06 14:37:35 +00:00
parent d686e0a53e
commit 0c25b2d6f5
5 changed files with 38 additions and 5 deletions
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2
src/brz.c
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@ -68,7 +68,7 @@ void brz_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs)
void brz_config_set_memory_availability(cmph_config_t *mph, cmph_uint32 memory_availability)
{
brz_config_data_t *brz = (brz_config_data_t *)mph->data;
brz->memory_availability = memory_availability*1024*1024;
if(memory_availability > 0) brz->memory_availability = memory_availability*1024*1024;
}
void brz_config_set_tmp_dir(cmph_config_t *mph, cmph_uint8 *tmp_dir)

1
src/brz.h
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@ -9,6 +9,7 @@ typedef struct __brz_config_data_t brz_config_data_t;
brz_config_data_t *brz_config_new();
void brz_config_set_hashfuncs(cmph_config_t *mph, CMPH_HASH *hashfuncs);
void brz_config_set_tmp_dir(cmph_config_t *mph, cmph_uint8 *tmp_dir);
void brz_config_set_memory_availability(cmph_config_t *mph, cmph_uint32 memory_availability);
void brz_config_destroy(cmph_config_t *mph);
cmph_t *brz_new(cmph_config_t *mph, float c);

19
src/cmph.c
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@ -204,6 +204,25 @@ void cmph_config_set_tmp_dir(cmph_config_t *mph, cmph_uint8 *tmp_dir)
}
void cmph_config_set_memory_availability(cmph_config_t *mph, cmph_uint32 memory_availability)
{
switch (mph->algo)
{
case CMPH_CHM:
break;
case CMPH_BMZ: /* included -- Fabiano */
break;
case CMPH_BMZ8: /* included -- Fabiano */
break;
case CMPH_BRZ: /* included -- Fabiano */
brz_config_set_memory_availability(mph, memory_availability);
break;
default:
assert(0);
}
}
void cmph_config_destroy(cmph_config_t *mph)
{
DEBUGP("Destroying mph with algo %s\n", cmph_names[mph->algo]);

1
src/cmph.h
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@ -36,6 +36,7 @@ void cmph_config_set_verbosity(cmph_config_t *mph, cmph_uint32 verbosity);
void cmph_config_set_graphsize(cmph_config_t *mph, float c);
void cmph_config_set_algo(cmph_config_t *mph, CMPH_ALGO algo);
void cmph_config_set_tmp_dir(cmph_config_t *mph, cmph_uint8 *tmp_dir);
void cmph_config_set_memory_availability(cmph_config_t *mph, cmph_uint32 memory_availability);
void cmph_config_destroy(cmph_config_t *mph);
/** Hash API **/

20
src/main.c
View File

@ -22,12 +22,12 @@
void usage(const char *prg)
{
fprintf(stderr, "usage: %s [-v] [-h] [-V] [-k nkeys] [-f hash_function] [-g [-c value][-s seed] ] [-a algorithm] [-d tmp_dir] [-m file.mph] keysfile\n", prg);
fprintf(stderr, "usage: %s [-v] [-h] [-V] [-k nkeys] [-f hash_function] [-g [-c value][-s seed] ] [-a algorithm] [-M memory_in_MB] [-d tmp_dir] [-m file.mph] keysfile\n", prg);
}
void usage_long(const char *prg)
{
cmph_uint32 i;
fprintf(stderr, "usage: %s [-v] [-h] [-V] [-k nkeys] [-f hash_function] [-g [-c value][-s seed] ] [-a algorithm] [-d tmp_dir] [-m file.mph] keysfile\n", prg);
fprintf(stderr, "usage: %s [-v] [-h] [-V] [-k nkeys] [-f hash_function] [-g [-c value][-s seed] ] [-a algorithm] [-M memory_in_MB] [-d tmp_dir] [-m file.mph] keysfile\n", prg);
fprintf(stderr, "Minimum perfect hashing tool\n\n");
fprintf(stderr, " -h\t print this help message\n");
fprintf(stderr, " -c\t c value that determines the number of vertices in the graph\n");
@ -41,6 +41,7 @@ void usage_long(const char *prg)
fprintf(stderr, " -g\t generation mode\n");
fprintf(stderr, " -s\t random seed\n");
fprintf(stderr, " -m\t minimum perfect hash function file \n");
fprintf(stderr, " -M\t main memory availability (in MB)\n");
fprintf(stderr, " -d\t temporary directory used in brz algorithm \n");
fprintf(stderr, " keysfile\t line separated file with keys\n");
}
@ -65,10 +66,10 @@ int main(int argc, char **argv)
cmph_t *mphf = NULL;
cmph_uint8 * tmp_dir = NULL;
cmph_io_adapter_t *source;
cmph_uint32 memory_availability = 0;
while (1)
{
char ch = getopt(argc, argv, "hVvgc:k:a:f:m:d:s:");
char ch = getopt(argc, argv, "hVvgc:k:a:M:f:m:d:s:");
if (ch == -1) break;
switch (ch)
{
@ -111,6 +112,16 @@ int main(int argc, char **argv)
case 'd':
tmp_dir = strdup(optarg);
break;
case 'M':
{
char *cptr;
memory_availability = strtoul(optarg, &cptr, 10);
if(*cptr != 0) {
fprintf(stderr, "Invalid memory availability %s\n", optarg);
exit(1);
}
}
break;
case 'v':
++verbosity;
break;
@ -202,6 +213,7 @@ int main(int argc, char **argv)
if (nhashes) cmph_config_set_hashfuncs(config, hashes);
cmph_config_set_verbosity(config, verbosity);
cmph_config_set_tmp_dir(config, tmp_dir);
cmph_config_set_memory_availability(config, memory_availability);
if(mph_algo == CMPH_BMZ && c >= 2.0) c=1.15;
if (c != 0) cmph_config_set_graphsize(config, c);
mphf = cmph_new(config);