};
+
+/**
+ * Get size of the bloom filter.
+ *
+ * @param bf the filter
+ * @return number of bytes used for the data of the bloom filter
+ */
+size_t
+GNUNET_CONTAINER_bloomfilter_get_size (const struct GNUNET_CONTAINER_BloomFilter
+ *bf)
+{
+ if (bf == NULL)
+ return 0;
+ return bf->bitArraySize;
+}
+
+
+/**
+ * Copy an existing memory. Any association with a file
+ * on-disk will be lost in the process.
+ * @param bf the filter to copy
+ * @return copy of the bf
+ */
+struct GNUNET_CONTAINER_BloomFilter *
+GNUNET_CONTAINER_bloomfilter_copy (const struct GNUNET_CONTAINER_BloomFilter *bf)
+{
+ return GNUNET_CONTAINER_bloomfilter_init (bf->bitArray,
+ bf->bitArraySize,
+ bf->addressesPerElement);
+}
+
+
/**
* Sets a bit active in the bitArray. Increment bit-specific
* usage counter on disk only if below 4bit max (==15).
* @param bit the current bit
*/
typedef void (*BitIterator) (void *cls,
- struct GNUNET_CONTAINER_BloomFilter * bf,
+ const struct GNUNET_CONTAINER_BloomFilter *bf,
unsigned int bit);
/**
* @param key the key for which we iterate over the BF bits
*/
static void
-iterateBits (struct GNUNET_CONTAINER_BloomFilter *bf,
- BitIterator callback, void *arg, const GNUNET_HashCode * key)
+iterateBits (const struct GNUNET_CONTAINER_BloomFilter *bf,
+ BitIterator callback, void *arg, const GNUNET_HashCode *key)
{
GNUNET_HashCode tmp[2];
int bitCount;
{
callback (arg,
bf,
- (((uint32_t *) & tmp[round & 1])[slot]) &
+ (((uint32_t *) &tmp[round & 1])[slot]) &
((bf->bitArraySize * 8) - 1));
slot++;
bitCount--;
/**
* Callback: increment bit
*
- * @param cls not used
+ * @param cls pointer to writeable form of bf
* @param bf the filter to manipulate
* @param bit the bit to increment
*/
static void
incrementBitCallback (void *cls,
- struct GNUNET_CONTAINER_BloomFilter *bf,
+ const struct GNUNET_CONTAINER_BloomFilter *bf,
unsigned int bit)
{
- incrementBit (bf->bitArray, bit, bf->fh);
+ struct GNUNET_CONTAINER_BloomFilter *b = cls;
+ incrementBit (b->bitArray, bit, bf->fh);
}
/**
* Callback: decrement bit
*
- * @param cls not used
+ * @param cls pointer to writeable form of bf
* @param bf the filter to manipulate
* @param bit the bit to decrement
*/
static void
decrementBitCallback (void *cls,
- struct GNUNET_CONTAINER_BloomFilter *bf,
+ const struct GNUNET_CONTAINER_BloomFilter *bf,
unsigned int bit)
{
- decrementBit (bf->bitArray, bit, bf->fh);
+ struct GNUNET_CONTAINER_BloomFilter *b = cls;
+ decrementBit (b->bitArray, bit, bf->fh);
}
/**
*/
static void
testBitCallback (void *cls,
- struct GNUNET_CONTAINER_BloomFilter *bf, unsigned int bit)
+ const struct GNUNET_CONTAINER_BloomFilter *bf,
+ unsigned int bit)
{
int *arg = cls;
if (GNUNET_NO == testBit (bf->bitArray, bit))
int i;
size_t ui;
+ GNUNET_assert (NULL != filename);
if ((k == 0) || (size == 0))
return NULL;
if (size < BUFFSIZE)
bf = GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_BloomFilter));
/* Try to open a bloomfilter file */
- if (filename != NULL)
- {
- bf->fh = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_READWRITE
- | GNUNET_DISK_OPEN_CREATE,
- GNUNET_DISK_PERM_USER_READ |
- GNUNET_DISK_PERM_USER_WRITE);
- if (NULL == bf->fh)
- {
- GNUNET_free (bf);
- return NULL;
- }
- bf->filename = GNUNET_strdup (filename);
- }
- else
+ bf->fh = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_READWRITE
+ | GNUNET_DISK_OPEN_CREATE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (NULL == bf->fh)
{
- bf->filename = NULL;
- bf->fh = NULL;
+ GNUNET_free (bf);
+ return NULL;
}
+ bf->filename = GNUNET_strdup (filename);
/* Alloc block */
bf->bitArray = GNUNET_malloc_large (size);
+ if (bf->bitArray == NULL)
+ {
+ if (bf->fh != NULL)
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf->filename);
+ GNUNET_free (bf);
+ return NULL;
+ }
bf->bitArraySize = size;
bf->addressesPerElement = k;
memset (bf->bitArray, 0, bf->bitArraySize);
- if (bf->filename != NULL)
+ /* Read from the file what bits we can */
+ rbuff = GNUNET_malloc (BUFFSIZE);
+ pos = 0;
+ while (pos < size * 8)
{
- /* Read from the file what bits we can */
- rbuff = GNUNET_malloc (BUFFSIZE);
- pos = 0;
- while (pos < size * 8)
- {
- int res;
-
- res = GNUNET_DISK_file_read (bf->fh, rbuff, BUFFSIZE);
- if (res == -1)
- {
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
- "read", bf->filename);
- }
- if (res == 0)
- break; /* is ok! we just did not use that many bits yet */
- for (i = 0; i < res; i++)
- {
- if ((rbuff[i] & 0x0F) != 0)
- setBit (bf->bitArray, pos + i * 2);
- if ((rbuff[i] & 0xF0) != 0)
- setBit (bf->bitArray, pos + i * 2 + 1);
- }
- if (res < BUFFSIZE)
- break;
- pos += BUFFSIZE * 2; /* 2 bits per byte in the buffer */
- }
- GNUNET_free (rbuff);
+ int res;
+
+ res = GNUNET_DISK_file_read (bf->fh, rbuff, BUFFSIZE);
+ if (res == -1)
+ {
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
+ "read", bf->filename);
+ }
+ if (res == 0)
+ break; /* is ok! we just did not use that many bits yet */
+ for (i = 0; i < res; i++)
+ {
+ if ((rbuff[i] & 0x0F) != 0)
+ setBit (bf->bitArray, pos + i * 2);
+ if ((rbuff[i] & 0xF0) != 0)
+ setBit (bf->bitArray, pos + i * 2 + 1);
+ }
+ if (res < BUFFSIZE)
+ break;
+ pos += BUFFSIZE * 2; /* 2 bits per byte in the buffer */
}
+ GNUNET_free (rbuff);
return bf;
}
bf->filename = NULL;
bf->fh = NULL;
bf->bitArray = GNUNET_malloc_large (size);
+ if (bf->bitArray == NULL)
+ {
+ GNUNET_free (bf);
+ return NULL;
+ }
bf->bitArraySize = size;
bf->addressesPerElement = k;
if (data != NULL)
* @return GNUNET_SYSERR if the data array is not big enough
*/
int
-GNUNET_CONTAINER_bloomfilter_get_raw_data (struct GNUNET_CONTAINER_BloomFilter
+GNUNET_CONTAINER_bloomfilter_get_raw_data (const struct GNUNET_CONTAINER_BloomFilter
*bf, char *data, size_t size)
{
if (NULL == bf)
return GNUNET_SYSERR;
-
if (bf->bitArraySize != size)
return GNUNET_SYSERR;
memcpy (data, bf->bitArray, size);
* @return GNUNET_YES if the element is in the filter, GNUNET_NO if not
*/
int
-GNUNET_CONTAINER_bloomfilter_test (struct GNUNET_CONTAINER_BloomFilter *bf,
+GNUNET_CONTAINER_bloomfilter_test (const struct GNUNET_CONTAINER_BloomFilter *bf,
const GNUNET_HashCode * e)
{
int res;
if (NULL == bf)
return;
- iterateBits (bf, &incrementBitCallback, NULL, e);
+ iterateBits (bf, &incrementBitCallback, bf, e);
}
const char *data, size_t size)
{
unsigned int i;
+ unsigned int n;
+ unsigned long long* fc;
+ const unsigned long long* dc;
if (NULL == bf)
return GNUNET_YES;
if (bf->bitArraySize != size)
return GNUNET_SYSERR;
- /* FIXME: we could do this 4-8x faster by
- going over int/long arrays */
- for (i = 0; i < size; i++)
+ fc = (unsigned long long*) bf->bitArray;
+ dc = (const unsigned long long*) data;
+ n = size / sizeof (unsigned long long);
+
+ for (i = 0; i < n; i++)
+ fc[i] |= dc[i];
+ for (i = n * sizeof(unsigned long long); i < size; i++)
bf->bitArray[i] |= data[i];
return GNUNET_OK;
}
+/**
+ * Or the entries of the given raw data array with the
+ * data of the given bloom filter. Assumes that
+ * the size of the data array and the current filter
+ * match.
+ *
+ * @param bf the filter
+ * @param to_or the bloomfilter to or-in
+ * @param size number of bytes in data
+ */
+int
+GNUNET_CONTAINER_bloomfilter_or2 (struct GNUNET_CONTAINER_BloomFilter *bf,
+ const struct GNUNET_CONTAINER_BloomFilter *to_or,
+ size_t size)
+{
+ unsigned int i;
+ unsigned int n;
+ unsigned long long* fc;
+ const unsigned long long* dc;
+
+ if (NULL == bf)
+ return GNUNET_YES;
+ if (bf->bitArraySize != size)
+ return GNUNET_SYSERR;
+ fc = (unsigned long long*) bf->bitArray;
+ dc = (const unsigned long long*) to_or->bitArray;
+ n = size / sizeof (unsigned long long);
+
+ for (i = 0; i < n; i++)
+ fc[i] |= dc[i];
+ for (i = n * sizeof(unsigned long long); i < size; i++)
+ bf->bitArray[i] |= to_or->bitArray[i];
+ return GNUNET_OK;
+}
+
/**
* Remove an element from the filter.
*
return;
if (bf->filename == NULL)
return;
- iterateBits (bf, &decrementBitCallback, NULL, e);
+ iterateBits (bf, &decrementBitCallback, bf, e);
}
/**
projects / oweals / gnunet.git / blobdiff