/*
This file is part of GNUnet.
- (C) 2001, 2002, 2003, 2004, 2006, 2008 Christian Grothoff (and other contributing authors)
+ (C) 2001, 2002, 2003, 2004, 2006, 2008, 2011, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
* @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)
+GNUNET_CONTAINER_bloomfilter_get_size (const struct GNUNET_CONTAINER_BloomFilter
+ *bf)
{
if (bf == NULL)
return 0;
*/
struct GNUNET_CONTAINER_BloomFilter *
GNUNET_CONTAINER_bloomfilter_copy (const struct GNUNET_CONTAINER_BloomFilter
- *bf)
+ *bf)
{
return GNUNET_CONTAINER_bloomfilter_init (bf->bitArray, bf->bitArraySize,
- bf->addressesPerElement);
+ bf->addressesPerElement);
}
*/
static void
incrementBit (char *bitArray, unsigned int bitIdx,
- const struct GNUNET_DISK_FileHandle *fh)
+ const struct GNUNET_DISK_FileHandle *fh)
{
- off_t fileSlot;
+ OFF_T fileSlot;
unsigned char value;
unsigned int high;
unsigned int low;
targetLoc = bitIdx % 2;
GNUNET_assert (fileSlot ==
- GNUNET_DISK_file_seek (fh, fileSlot, GNUNET_DISK_SEEK_SET));
+ GNUNET_DISK_file_seek (fh, fileSlot, GNUNET_DISK_SEEK_SET));
if (1 != GNUNET_DISK_file_read (fh, &value, 1))
value = 0;
low = value & 0xF;
high = (value & (~0xF)) >> 4;
if (targetLoc == 0)
- {
- if (low < 0xF)
- low++;
- }
+ {
+ if (low < 0xF)
+ low++;
+ }
else
- {
- if (high < 0xF)
- high++;
- }
+ {
+ if (high < 0xF)
+ high++;
+ }
value = ((high << 4) | low);
GNUNET_assert (fileSlot ==
- GNUNET_DISK_file_seek (fh, fileSlot, GNUNET_DISK_SEEK_SET));
+ GNUNET_DISK_file_seek (fh, fileSlot, GNUNET_DISK_SEEK_SET));
GNUNET_assert (1 == GNUNET_DISK_file_write (fh, &value, 1));
}
*/
static void
decrementBit (char *bitArray, unsigned int bitIdx,
- const struct GNUNET_DISK_FileHandle *fh)
+ const struct GNUNET_DISK_FileHandle *fh)
{
- off_t fileSlot;
+ OFF_T fileslot;
unsigned char value;
unsigned int high;
unsigned int low;
unsigned int targetLoc;
if (GNUNET_DISK_handle_invalid (fh))
- return; /* cannot decrement! */
+ return; /* cannot decrement! */
/* Each char slot in the counter file holds two 4 bit counters */
- fileSlot = bitIdx / 2;
+ fileslot = bitIdx / 2;
targetLoc = bitIdx % 2;
- GNUNET_DISK_file_seek (fh, fileSlot, GNUNET_DISK_SEEK_SET);
+ if (GNUNET_SYSERR == GNUNET_DISK_file_seek (fh, fileslot, GNUNET_DISK_SEEK_SET))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "seek");
+ return;
+ }
if (1 != GNUNET_DISK_file_read (fh, &value, 1))
value = 0;
low = value & 0xF;
/* decrement, but once we have reached the max, never go back! */
if (targetLoc == 0)
+ {
+ if ((low > 0) && (low < 0xF))
+ low--;
+ if (low == 0)
{
- if ((low > 0) && (low < 0xF))
- low--;
- if (low == 0)
- {
- clearBit (bitArray, bitIdx);
- }
+ clearBit (bitArray, bitIdx);
}
+ }
else
+ {
+ if ((high > 0) && (high < 0xF))
+ high--;
+ if (high == 0)
{
- if ((high > 0) && (high < 0xF))
- high--;
- if (high == 0)
- {
- clearBit (bitArray, bitIdx);
- }
+ clearBit (bitArray, bitIdx);
}
+ }
value = ((high << 4) | low);
- GNUNET_DISK_file_seek (fh, fileSlot, GNUNET_DISK_SEEK_SET);
+ if (GNUNET_SYSERR == GNUNET_DISK_file_seek (fh, fileslot, GNUNET_DISK_SEEK_SET))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "seek");
+ return;
+ }
GNUNET_assert (1 == GNUNET_DISK_file_write (fh, &value, 1));
}
* @return GNUNET_OK if created ok, GNUNET_SYSERR otherwise
*/
static int
-makeEmptyFile (const struct GNUNET_DISK_FileHandle *fh, size_t size)
+make_empty_file (const struct GNUNET_DISK_FileHandle *fh, size_t size)
{
- char *buffer;
+ char buffer[BUFFSIZE];
size_t bytesleft = size;
int res = 0;
if (GNUNET_DISK_handle_invalid (fh))
return GNUNET_SYSERR;
- buffer = GNUNET_malloc (BUFFSIZE);
- memset (buffer, 0, BUFFSIZE);
+ memset (buffer, 0, sizeof (buffer));
GNUNET_DISK_file_seek (fh, 0, GNUNET_DISK_SEEK_SET);
-
while (bytesleft > 0)
+ {
+ if (bytesleft > sizeof (buffer))
+ {
+ res = GNUNET_DISK_file_write (fh, buffer, sizeof (buffer));
+ if (res >= 0)
+ bytesleft -= res;
+ }
+ else
{
- if (bytesleft > BUFFSIZE)
- {
- res = GNUNET_DISK_file_write (fh, buffer, BUFFSIZE);
- bytesleft -= BUFFSIZE;
- }
- else
- {
- res = GNUNET_DISK_file_write (fh, buffer, bytesleft);
- bytesleft = 0;
- }
- GNUNET_assert (res != GNUNET_SYSERR);
+ res = GNUNET_DISK_file_write (fh, buffer, bytesleft);
+ if (res >= 0)
+ bytesleft -= res;
}
- GNUNET_free (buffer);
+ if (GNUNET_SYSERR == res)
+ return GNUNET_SYSERR;
+ }
return GNUNET_OK;
}
* @return GNUNET_YES to continue, GNUNET_NO to stop early
*/
typedef int (*BitIterator) (void *cls,
- const struct GNUNET_CONTAINER_BloomFilter * bf,
- unsigned int bit);
+ const struct GNUNET_CONTAINER_BloomFilter * bf,
+ unsigned int bit);
/**
*/
static void
iterateBits (const struct GNUNET_CONTAINER_BloomFilter *bf,
- BitIterator callback, void *arg, const GNUNET_HashCode * key)
+ BitIterator callback, void *arg, const struct GNUNET_HashCode *key)
{
- GNUNET_HashCode tmp[2];
+ struct GNUNET_HashCode tmp[2];
int bitCount;
unsigned int round;
unsigned int slot = 0;
bitCount = bf->addressesPerElement;
tmp[0] = *key;
round = 0;
+ GNUNET_assert (bf->bitArraySize > 0);
+ GNUNET_assert (bf->bitArraySize * 8LL > bf->bitArraySize);
while (bitCount > 0)
+ {
+ while (slot < (sizeof (struct GNUNET_HashCode) / sizeof (uint32_t)))
{
- while (slot < (sizeof (GNUNET_HashCode) / sizeof (uint32_t)))
- {
- if (GNUNET_YES !=
- callback (arg, bf,
- (((uint32_t *) & tmp[round & 1])[slot]) &
- ((bf->bitArraySize * 8) - 1)))
- return;
- slot++;
- bitCount--;
- if (bitCount == 0)
- break;
- }
- if (bitCount > 0)
- {
- GNUNET_CRYPTO_hash (&tmp[round & 1], sizeof (GNUNET_HashCode),
- &tmp[(round + 1) & 1]);
- round++;
- slot = 0;
- }
+ if (GNUNET_YES !=
+ callback (arg, bf,
+ ntohl ((((uint32_t *) & tmp[round & 1])[slot])) %
+ ((bf->bitArraySize * 8LL))))
+ return;
+ slot++;
+ bitCount--;
+ if (bitCount == 0)
+ break;
}
+ if (bitCount > 0)
+ {
+ GNUNET_CRYPTO_hash (&tmp[round & 1], sizeof (struct GNUNET_HashCode),
+ &tmp[(round + 1) & 1]);
+ round++;
+ slot = 0;
+ }
+ }
}
* @return GNUNET_YES
*/
static int
-incrementBitCallback (void *cls,
- const struct GNUNET_CONTAINER_BloomFilter *bf,
- unsigned int bit)
+incrementBitCallback (void *cls, const struct GNUNET_CONTAINER_BloomFilter *bf,
+ unsigned int bit)
{
struct GNUNET_CONTAINER_BloomFilter *b = cls;
* @return GNUNET_YES
*/
static int
-decrementBitCallback (void *cls,
- const struct GNUNET_CONTAINER_BloomFilter *bf,
- unsigned int bit)
+decrementBitCallback (void *cls, const struct GNUNET_CONTAINER_BloomFilter *bf,
+ unsigned int bit)
{
struct GNUNET_CONTAINER_BloomFilter *b = cls;
*/
static int
testBitCallback (void *cls, const struct GNUNET_CONTAINER_BloomFilter *bf,
- unsigned int bit)
+ unsigned int bit)
{
int *arg = cls;
if (GNUNET_NO == testBit (bf->bitArray, bit))
- {
- *arg = GNUNET_NO;
- return GNUNET_NO;
- }
+ {
+ *arg = GNUNET_NO;
+ return GNUNET_NO;
+ }
return GNUNET_YES;
}
*
* @param filename the name of the file (or the prefix)
* @param size the size of the bloom-filter (number of
- * bytes of storage space to use)
+ * bytes of storage space to use); will be rounded up
+ * to next power of 2
* @param k the number of GNUNET_CRYPTO_hash-functions to apply per
* element (number of bits set per element in the set)
* @return the bloomfilter
*/
struct GNUNET_CONTAINER_BloomFilter *
GNUNET_CONTAINER_bloomfilter_load (const char *filename, size_t size,
- unsigned int k)
+ unsigned int k)
{
struct GNUNET_CONTAINER_BloomFilter *bf;
char *rbuff;
- off_t pos;
+ OFF_T pos;
int i;
size_t ui;
+ OFF_T fsize;
+ int must_read;
GNUNET_assert (NULL != filename);
if ((k == 0) || (size == 0))
if (size < BUFFSIZE)
size = BUFFSIZE;
ui = 1;
- while (ui < size)
+ while ( (ui < size) &&
+ (ui * 2 > ui) )
ui *= 2;
- size = ui; /* make sure it's a power of 2 */
+ size = ui; /* make sure it's a power of 2 */
bf = GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_BloomFilter));
/* Try to open a bloomfilter file */
- 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)
+ if (GNUNET_YES == GNUNET_DISK_file_test (filename))
+ bf->fh =
+ GNUNET_DISK_file_open (filename,
+ GNUNET_DISK_OPEN_READWRITE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (NULL != bf->fh)
+ {
+ /* file existed, try to read it! */
+ must_read = GNUNET_YES;
+ if (GNUNET_OK !=
+ GNUNET_DISK_file_handle_size (bf->fh, &fsize))
{
+ GNUNET_DISK_file_close (bf->fh);
GNUNET_free (bf);
return NULL;
}
- bf->filename = GNUNET_strdup (filename);
- /* Alloc block */
- bf->bitArray = GNUNET_malloc_large (size);
- if (bf->bitArray == NULL)
+ if (fsize == 0)
{
- if (bf->fh != NULL)
+ /* found existing empty file, just overwrite */
+ if (GNUNET_OK != make_empty_file (bf->fh, size * 4LL))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "write");
GNUNET_DISK_file_close (bf->fh);
- GNUNET_free (bf->filename);
+ GNUNET_free (bf);
+ return NULL;
+ }
+ }
+ else if (fsize != size * 4LL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Size of file on disk is incorrect for this Bloom filter (want %llu, have %llu)\n"),
+ (unsigned long long) (size * 4LL),
+ (unsigned long long) fsize);
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
+ }
+ }
+ else
+ {
+ /* file did not exist, don't read, just create */
+ must_read = GNUNET_NO;
+ bf->fh =
+ GNUNET_DISK_file_open (filename,
+ GNUNET_DISK_OPEN_CREATE |
+ GNUNET_DISK_OPEN_READWRITE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (NULL == bf->fh)
+ {
+ GNUNET_free (bf);
+ return NULL;
+ }
+ if (GNUNET_OK != make_empty_file (bf->fh, size * 4LL))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "write");
+ GNUNET_DISK_file_close (bf->fh);
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 (GNUNET_YES != must_read)
+ return bf; /* already done! */
/* Read from the file what bits we can */
rbuff = GNUNET_malloc (BUFFSIZE);
pos = 0;
- while (pos < size * 8)
+ while (pos < size * 8LL)
+ {
+ int res;
+
+ res = GNUNET_DISK_file_read (bf->fh, rbuff, BUFFSIZE);
+ if (res == -1)
{
- int res;
-
- res = GNUNET_DISK_file_read (bf->fh, rbuff, BUFFSIZE);
- if (res == -1)
- {
- 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 */
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "read", bf->filename);
+ GNUNET_free (rbuff);
+ GNUNET_free (bf->filename);
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
}
+ 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;
}
*/
struct GNUNET_CONTAINER_BloomFilter *
GNUNET_CONTAINER_bloomfilter_init (const char *data, size_t size,
- unsigned int k)
+ unsigned int k)
{
struct GNUNET_CONTAINER_BloomFilter *bf;
- size_t ui;
- if ((k == 0) || (size == 0))
+ if ((0 == k) || (0 == size))
return NULL;
- ui = 1;
- while (ui < size)
- ui *= 2;
- if (size != ui)
- {
- GNUNET_break (0);
- return NULL;
- }
bf = GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_BloomFilter));
bf->filename = NULL;
bf->fh = NULL;
bf->bitArray = GNUNET_malloc_large (size);
- if (bf->bitArray == NULL)
- {
- GNUNET_free (bf);
- return NULL;
- }
+ if (NULL == bf->bitArray)
+ {
+ GNUNET_free (bf);
+ return NULL;
+ }
bf->bitArraySize = size;
bf->addressesPerElement = k;
- if (data != NULL)
+ if (NULL != data)
memcpy (bf->bitArray, data, size);
- else
- memset (bf->bitArray, 0, bf->bitArraySize);
return bf;
}
*/
int
GNUNET_CONTAINER_bloomfilter_get_raw_data (const struct
- GNUNET_CONTAINER_BloomFilter *bf,
- char *data, size_t size)
+ GNUNET_CONTAINER_BloomFilter *bf,
+ char *data, size_t size)
{
if (NULL == bf)
return GNUNET_SYSERR;
memset (bf->bitArray, 0, bf->bitArraySize);
if (bf->filename != NULL)
- makeEmptyFile (bf->fh, bf->bitArraySize * 4);
+ make_empty_file (bf->fh, bf->bitArraySize * 4LL);
}
*/
int
GNUNET_CONTAINER_bloomfilter_test (const struct GNUNET_CONTAINER_BloomFilter
- *bf, const GNUNET_HashCode * e)
+ *bf, const struct GNUNET_HashCode * e)
{
int res;
*/
void
GNUNET_CONTAINER_bloomfilter_add (struct GNUNET_CONTAINER_BloomFilter *bf,
- const GNUNET_HashCode * e)
+ const struct GNUNET_HashCode * e)
{
if (NULL == bf)
return;
*/
int
GNUNET_CONTAINER_bloomfilter_or (struct GNUNET_CONTAINER_BloomFilter *bf,
- const char *data, size_t size)
+ const char *data, size_t size)
{
unsigned int i;
unsigned int n;
*/
int
GNUNET_CONTAINER_bloomfilter_or2 (struct GNUNET_CONTAINER_BloomFilter *bf,
- const struct GNUNET_CONTAINER_BloomFilter
- *to_or, size_t size)
+ const struct GNUNET_CONTAINER_BloomFilter
+ *to_or, size_t size)
{
unsigned int i;
unsigned int n;
*/
void
GNUNET_CONTAINER_bloomfilter_remove (struct GNUNET_CONTAINER_BloomFilter *bf,
- const GNUNET_HashCode * e)
+ const struct GNUNET_HashCode * e)
{
if (NULL == bf)
return;
*/
void
GNUNET_CONTAINER_bloomfilter_resize (struct GNUNET_CONTAINER_BloomFilter *bf,
- GNUNET_HashCodeIterator iterator,
- void *iterator_cls, size_t size,
- unsigned int k)
+ GNUNET_HashCodeIterator iterator,
+ void *iterator_cls, size_t size,
+ unsigned int k)
{
- GNUNET_HashCode hc;
+ struct GNUNET_HashCode hc;
unsigned int i;
GNUNET_free (bf->bitArray);
i = 1;
while (i < size)
i *= 2;
- size = i; /* make sure it's a power of 2 */
+ size = i; /* make sure it's a power of 2 */
bf->bitArraySize = size;
bf->bitArray = GNUNET_malloc (size);
- memset (bf->bitArray, 0, bf->bitArraySize);
if (bf->filename != NULL)
- makeEmptyFile (bf->fh, bf->bitArraySize * 4);
+ make_empty_file (bf->fh, bf->bitArraySize * 4LL);
while (GNUNET_YES == iterator (iterator_cls, &hc))
GNUNET_CONTAINER_bloomfilter_add (bf, &hc);
}
projects / oweals / gnunet.git / blobdiff