summaryrefslogtreecommitdiff
path: root/ewah
diff options
context:
space:
mode:
Diffstat (limited to 'ewah')
-rw-r--r--ewah/bitmap.c35
-rw-r--r--ewah/ewah_bitmap.c252
-rw-r--r--ewah/ewah_io.c119
-rw-r--r--ewah/ewah_rlw.c11
-rw-r--r--ewah/ewok.h38
-rw-r--r--ewah/ewok_rlw.h8
6 files changed, 43 insertions, 420 deletions
diff --git a/ewah/bitmap.c b/ewah/bitmap.c
index 7103ceefbf..52f1178db4 100644
--- a/ewah/bitmap.c
+++ b/ewah/bitmap.c
@@ -14,8 +14,7 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "cache.h"
#include "ewok.h"
@@ -46,14 +45,6 @@ void bitmap_set(struct bitmap *self, size_t pos)
self->words[block] |= EWAH_MASK(pos);
}
-void bitmap_clear(struct bitmap *self, size_t pos)
-{
- size_t block = EWAH_BLOCK(pos);
-
- if (block < self->word_alloc)
- self->words[block] &= ~EWAH_MASK(pos);
-}
-
int bitmap_get(struct bitmap *self, size_t pos)
{
size_t block = EWAH_BLOCK(pos);
@@ -138,30 +129,6 @@ void bitmap_or_ewah(struct bitmap *self, struct ewah_bitmap *other)
self->words[i++] |= word;
}
-void bitmap_each_bit(struct bitmap *self, ewah_callback callback, void *data)
-{
- size_t pos = 0, i;
-
- for (i = 0; i < self->word_alloc; ++i) {
- eword_t word = self->words[i];
- uint32_t offset;
-
- if (word == (eword_t)~0) {
- for (offset = 0; offset < BITS_IN_EWORD; ++offset)
- callback(pos++, data);
- } else {
- for (offset = 0; offset < BITS_IN_EWORD; ++offset) {
- if ((word >> offset) == 0)
- break;
-
- offset += ewah_bit_ctz64(word >> offset);
- callback(pos + offset, data);
- }
- pos += BITS_IN_EWORD;
- }
- }
-}
-
size_t bitmap_popcount(struct bitmap *self)
{
size_t i, count = 0;
diff --git a/ewah/ewah_bitmap.c b/ewah/ewah_bitmap.c
index 06c479f70a..d59b1afe3d 100644
--- a/ewah/ewah_bitmap.c
+++ b/ewah/ewah_bitmap.c
@@ -14,8 +14,7 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "git-compat-util.h"
#include "ewok.h"
@@ -277,6 +276,18 @@ void ewah_each_bit(struct ewah_bitmap *self, void (*callback)(size_t, void*), vo
}
}
+/**
+ * Clear all the bits in the bitmap. Does not free or resize
+ * memory.
+ */
+static void ewah_clear(struct ewah_bitmap *self)
+{
+ self->buffer_size = 1;
+ self->buffer[0] = 0;
+ self->bit_size = 0;
+ self->rlw = self->buffer;
+}
+
struct ewah_bitmap *ewah_new(void)
{
struct ewah_bitmap *self;
@@ -289,14 +300,6 @@ struct ewah_bitmap *ewah_new(void)
return self;
}
-void ewah_clear(struct ewah_bitmap *self)
-{
- self->buffer_size = 1;
- self->buffer[0] = 0;
- self->bit_size = 0;
- self->rlw = self->buffer;
-}
-
void ewah_free(struct ewah_bitmap *self)
{
if (!self)
@@ -377,25 +380,6 @@ void ewah_iterator_init(struct ewah_iterator *it, struct ewah_bitmap *parent)
read_new_rlw(it);
}
-void ewah_not(struct ewah_bitmap *self)
-{
- size_t pointer = 0;
-
- while (pointer < self->buffer_size) {
- eword_t *word = &self->buffer[pointer];
- size_t literals, k;
-
- rlw_xor_run_bit(word);
- ++pointer;
-
- literals = rlw_get_literal_words(word);
- for (k = 0; k < literals; ++k) {
- self->buffer[pointer] = ~self->buffer[pointer];
- ++pointer;
- }
- }
-}
-
void ewah_xor(
struct ewah_bitmap *ewah_i,
struct ewah_bitmap *ewah_j,
@@ -460,216 +444,6 @@ void ewah_xor(
out->bit_size = max_size(ewah_i->bit_size, ewah_j->bit_size);
}
-void ewah_and(
- struct ewah_bitmap *ewah_i,
- struct ewah_bitmap *ewah_j,
- struct ewah_bitmap *out)
-{
- struct rlw_iterator rlw_i;
- struct rlw_iterator rlw_j;
- size_t literals;
-
- rlwit_init(&rlw_i, ewah_i);
- rlwit_init(&rlw_j, ewah_j);
-
- while (rlwit_word_size(&rlw_i) > 0 && rlwit_word_size(&rlw_j) > 0) {
- while (rlw_i.rlw.running_len > 0 || rlw_j.rlw.running_len > 0) {
- struct rlw_iterator *prey, *predator;
-
- if (rlw_i.rlw.running_len < rlw_j.rlw.running_len) {
- prey = &rlw_i;
- predator = &rlw_j;
- } else {
- prey = &rlw_j;
- predator = &rlw_i;
- }
-
- if (predator->rlw.running_bit == 0) {
- ewah_add_empty_words(out, 0,
- predator->rlw.running_len);
- rlwit_discard_first_words(prey,
- predator->rlw.running_len);
- rlwit_discard_first_words(predator,
- predator->rlw.running_len);
- } else {
- size_t index = rlwit_discharge(prey, out,
- predator->rlw.running_len, 0);
- ewah_add_empty_words(out, 0,
- predator->rlw.running_len - index);
- rlwit_discard_first_words(predator,
- predator->rlw.running_len);
- }
- }
-
- literals = min_size(
- rlw_i.rlw.literal_words,
- rlw_j.rlw.literal_words);
-
- if (literals) {
- size_t k;
-
- for (k = 0; k < literals; ++k) {
- ewah_add(out,
- rlw_i.buffer[rlw_i.literal_word_start + k] &
- rlw_j.buffer[rlw_j.literal_word_start + k]
- );
- }
-
- rlwit_discard_first_words(&rlw_i, literals);
- rlwit_discard_first_words(&rlw_j, literals);
- }
- }
-
- if (rlwit_word_size(&rlw_i) > 0)
- rlwit_discharge_empty(&rlw_i, out);
- else
- rlwit_discharge_empty(&rlw_j, out);
-
- out->bit_size = max_size(ewah_i->bit_size, ewah_j->bit_size);
-}
-
-void ewah_and_not(
- struct ewah_bitmap *ewah_i,
- struct ewah_bitmap *ewah_j,
- struct ewah_bitmap *out)
-{
- struct rlw_iterator rlw_i;
- struct rlw_iterator rlw_j;
- size_t literals;
-
- rlwit_init(&rlw_i, ewah_i);
- rlwit_init(&rlw_j, ewah_j);
-
- while (rlwit_word_size(&rlw_i) > 0 && rlwit_word_size(&rlw_j) > 0) {
- while (rlw_i.rlw.running_len > 0 || rlw_j.rlw.running_len > 0) {
- struct rlw_iterator *prey, *predator;
-
- if (rlw_i.rlw.running_len < rlw_j.rlw.running_len) {
- prey = &rlw_i;
- predator = &rlw_j;
- } else {
- prey = &rlw_j;
- predator = &rlw_i;
- }
-
- if ((predator->rlw.running_bit && prey == &rlw_i) ||
- (!predator->rlw.running_bit && prey != &rlw_i)) {
- ewah_add_empty_words(out, 0,
- predator->rlw.running_len);
- rlwit_discard_first_words(prey,
- predator->rlw.running_len);
- rlwit_discard_first_words(predator,
- predator->rlw.running_len);
- } else {
- size_t index;
- int negate_words;
-
- negate_words = (&rlw_i != prey);
- index = rlwit_discharge(prey, out,
- predator->rlw.running_len, negate_words);
- ewah_add_empty_words(out, negate_words,
- predator->rlw.running_len - index);
- rlwit_discard_first_words(predator,
- predator->rlw.running_len);
- }
- }
-
- literals = min_size(
- rlw_i.rlw.literal_words,
- rlw_j.rlw.literal_words);
-
- if (literals) {
- size_t k;
-
- for (k = 0; k < literals; ++k) {
- ewah_add(out,
- rlw_i.buffer[rlw_i.literal_word_start + k] &
- ~(rlw_j.buffer[rlw_j.literal_word_start + k])
- );
- }
-
- rlwit_discard_first_words(&rlw_i, literals);
- rlwit_discard_first_words(&rlw_j, literals);
- }
- }
-
- if (rlwit_word_size(&rlw_i) > 0)
- rlwit_discharge(&rlw_i, out, ~0, 0);
- else
- rlwit_discharge_empty(&rlw_j, out);
-
- out->bit_size = max_size(ewah_i->bit_size, ewah_j->bit_size);
-}
-
-void ewah_or(
- struct ewah_bitmap *ewah_i,
- struct ewah_bitmap *ewah_j,
- struct ewah_bitmap *out)
-{
- struct rlw_iterator rlw_i;
- struct rlw_iterator rlw_j;
- size_t literals;
-
- rlwit_init(&rlw_i, ewah_i);
- rlwit_init(&rlw_j, ewah_j);
-
- while (rlwit_word_size(&rlw_i) > 0 && rlwit_word_size(&rlw_j) > 0) {
- while (rlw_i.rlw.running_len > 0 || rlw_j.rlw.running_len > 0) {
- struct rlw_iterator *prey, *predator;
-
- if (rlw_i.rlw.running_len < rlw_j.rlw.running_len) {
- prey = &rlw_i;
- predator = &rlw_j;
- } else {
- prey = &rlw_j;
- predator = &rlw_i;
- }
-
- if (predator->rlw.running_bit) {
- ewah_add_empty_words(out, 0,
- predator->rlw.running_len);
- rlwit_discard_first_words(prey,
- predator->rlw.running_len);
- rlwit_discard_first_words(predator,
- predator->rlw.running_len);
- } else {
- size_t index = rlwit_discharge(prey, out,
- predator->rlw.running_len, 0);
- ewah_add_empty_words(out, 0,
- predator->rlw.running_len - index);
- rlwit_discard_first_words(predator,
- predator->rlw.running_len);
- }
- }
-
- literals = min_size(
- rlw_i.rlw.literal_words,
- rlw_j.rlw.literal_words);
-
- if (literals) {
- size_t k;
-
- for (k = 0; k < literals; ++k) {
- ewah_add(out,
- rlw_i.buffer[rlw_i.literal_word_start + k] |
- rlw_j.buffer[rlw_j.literal_word_start + k]
- );
- }
-
- rlwit_discard_first_words(&rlw_i, literals);
- rlwit_discard_first_words(&rlw_j, literals);
- }
- }
-
- if (rlwit_word_size(&rlw_i) > 0)
- rlwit_discharge(&rlw_i, out, ~0, 0);
- else
- rlwit_discharge(&rlw_j, out, ~0, 0);
-
- out->bit_size = max_size(ewah_i->bit_size, ewah_j->bit_size);
-}
-
-
#define BITMAP_POOL_MAX 16
static struct ewah_bitmap *bitmap_pool[BITMAP_POOL_MAX];
static size_t bitmap_pool_size;
diff --git a/ewah/ewah_io.c b/ewah/ewah_io.c
index f73210973f..9035ee65ea 100644
--- a/ewah/ewah_io.c
+++ b/ewah/ewah_io.c
@@ -14,39 +14,12 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "git-compat-util.h"
#include "ewok.h"
#include "strbuf.h"
-int ewah_serialize_native(struct ewah_bitmap *self, int fd)
-{
- uint32_t write32;
- size_t to_write = self->buffer_size * 8;
-
- /* 32 bit -- bit size for the map */
- write32 = (uint32_t)self->bit_size;
- if (write(fd, &write32, 4) != 4)
- return -1;
-
- /** 32 bit -- number of compressed 64-bit words */
- write32 = (uint32_t)self->buffer_size;
- if (write(fd, &write32, 4) != 4)
- return -1;
-
- if (write(fd, self->buffer, to_write) != to_write)
- return -1;
-
- /** 32 bit -- position for the RLW */
- write32 = self->rlw - self->buffer;
- if (write(fd, &write32, 4) != 4)
- return -1;
-
- return (3 * 4) + to_write;
-}
-
int ewah_serialize_to(struct ewah_bitmap *self,
int (*write_fun)(void *, const void *, size_t),
void *data)
@@ -101,16 +74,6 @@ int ewah_serialize_to(struct ewah_bitmap *self,
return (3 * 4) + (self->buffer_size * 8);
}
-static int write_helper(void *fd, const void *buf, size_t len)
-{
- return write((intptr_t)fd, buf, len);
-}
-
-int ewah_serialize(struct ewah_bitmap *self, int fd)
-{
- return ewah_serialize_to(self, write_helper, (void *)(intptr_t)fd);
-}
-
static int write_strbuf(void *user_data, const void *data, size_t len)
{
struct strbuf *sb = user_data;
@@ -123,16 +86,23 @@ int ewah_serialize_strbuf(struct ewah_bitmap *self, struct strbuf *sb)
return ewah_serialize_to(self, write_strbuf, sb);
}
-int ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len)
+ssize_t ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len)
{
const uint8_t *ptr = map;
+ size_t data_len;
size_t i;
+ if (len < sizeof(uint32_t))
+ return error("corrupt ewah bitmap: eof before bit size");
self->bit_size = get_be32(ptr);
ptr += sizeof(uint32_t);
+ len -= sizeof(uint32_t);
+ if (len < sizeof(uint32_t))
+ return error("corrupt ewah bitmap: eof before length");
self->buffer_size = self->alloc_size = get_be32(ptr);
ptr += sizeof(uint32_t);
+ len -= sizeof(uint32_t);
REALLOC_ARRAY(self->buffer, self->alloc_size);
@@ -142,68 +112,23 @@ int ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len)
* the endianness conversion in a separate pass to ensure
* we're loading 8-byte aligned words.
*/
- memcpy(self->buffer, ptr, self->buffer_size * sizeof(eword_t));
- ptr += self->buffer_size * sizeof(eword_t);
+ data_len = st_mult(self->buffer_size, sizeof(eword_t));
+ if (len < data_len)
+ return error("corrupt ewah bitmap: eof in data "
+ "(%"PRIuMAX" bytes short)",
+ (uintmax_t)(data_len - len));
+ memcpy(self->buffer, ptr, data_len);
+ ptr += data_len;
+ len -= data_len;
for (i = 0; i < self->buffer_size; ++i)
self->buffer[i] = ntohll(self->buffer[i]);
+ if (len < sizeof(uint32_t))
+ return error("corrupt ewah bitmap: eof before rlw");
self->rlw = self->buffer + get_be32(ptr);
+ ptr += sizeof(uint32_t);
+ len -= sizeof(uint32_t);
- return (3 * 4) + (self->buffer_size * 8);
-}
-
-int ewah_deserialize(struct ewah_bitmap *self, int fd)
-{
- size_t i;
- eword_t dump[2048];
- const size_t words_per_dump = sizeof(dump) / sizeof(eword_t);
- uint32_t bitsize, word_count, rlw_pos;
-
- eword_t *buffer = NULL;
- size_t words_left;
-
- ewah_clear(self);
-
- /* 32 bit -- bit size for the map */
- if (read(fd, &bitsize, 4) != 4)
- return -1;
-
- self->bit_size = (size_t)ntohl(bitsize);
-
- /** 32 bit -- number of compressed 64-bit words */
- if (read(fd, &word_count, 4) != 4)
- return -1;
-
- self->buffer_size = self->alloc_size = (size_t)ntohl(word_count);
- REALLOC_ARRAY(self->buffer, self->alloc_size);
-
- /** 64 bit x N -- compressed words */
- buffer = self->buffer;
- words_left = self->buffer_size;
-
- while (words_left >= words_per_dump) {
- if (read(fd, dump, sizeof(dump)) != sizeof(dump))
- return -1;
-
- for (i = 0; i < words_per_dump; ++i, ++buffer)
- *buffer = ntohll(dump[i]);
-
- words_left -= words_per_dump;
- }
-
- if (words_left) {
- if (read(fd, dump, words_left * 8) != words_left * 8)
- return -1;
-
- for (i = 0; i < words_left; ++i, ++buffer)
- *buffer = ntohll(dump[i]);
- }
-
- /** 32 bit -- position for the RLW */
- if (read(fd, &rlw_pos, 4) != 4)
- return -1;
-
- self->rlw = self->buffer + ntohl(rlw_pos);
- return 0;
+ return ptr - (const uint8_t *)map;
}
diff --git a/ewah/ewah_rlw.c b/ewah/ewah_rlw.c
index c723f1aefd..5093d43e2f 100644
--- a/ewah/ewah_rlw.c
+++ b/ewah/ewah_rlw.c
@@ -14,8 +14,7 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "git-compat-util.h"
#include "ewok.h"
@@ -105,11 +104,3 @@ size_t rlwit_discharge(
return index;
}
-
-void rlwit_discharge_empty(struct rlw_iterator *it, struct ewah_bitmap *out)
-{
- while (rlwit_word_size(it) > 0) {
- ewah_add_empty_words(out, 0, rlwit_word_size(it));
- rlwit_discard_first_words(it, rlwit_word_size(it));
- }
-}
diff --git a/ewah/ewok.h b/ewah/ewok.h
index 269a1a8706..84b2a29faa 100644
--- a/ewah/ewok.h
+++ b/ewah/ewok.h
@@ -14,8 +14,7 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __EWOK_BITMAP_H__
#define __EWOK_BITMAP_H__
@@ -74,12 +73,6 @@ void ewah_pool_free(struct ewah_bitmap *self);
struct ewah_bitmap *ewah_new(void);
/**
- * Clear all the bits in the bitmap. Does not free or resize
- * memory.
- */
-void ewah_clear(struct ewah_bitmap *self);
-
-/**
* Free all the memory of the bitmap
*/
void ewah_free(struct ewah_bitmap *self);
@@ -87,23 +80,13 @@ void ewah_free(struct ewah_bitmap *self);
int ewah_serialize_to(struct ewah_bitmap *self,
int (*write_fun)(void *out, const void *buf, size_t len),
void *out);
-int ewah_serialize(struct ewah_bitmap *self, int fd);
-int ewah_serialize_native(struct ewah_bitmap *self, int fd);
int ewah_serialize_strbuf(struct ewah_bitmap *self, struct strbuf *);
-int ewah_deserialize(struct ewah_bitmap *self, int fd);
-int ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len);
+ssize_t ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len);
uint32_t ewah_checksum(struct ewah_bitmap *self);
/**
- * Logical not (bitwise negation) in-place on the bitmap
- *
- * This operation is linear time based on the size of the bitmap.
- */
-void ewah_not(struct ewah_bitmap *self);
-
-/**
* Call the given callback with the position of every single bit
* that has been set on the bitmap.
*
@@ -165,26 +148,11 @@ void ewah_iterator_init(struct ewah_iterator *it, struct ewah_bitmap *parent);
*/
int ewah_iterator_next(eword_t *next, struct ewah_iterator *it);
-void ewah_or(
- struct ewah_bitmap *ewah_i,
- struct ewah_bitmap *ewah_j,
- struct ewah_bitmap *out);
-
-void ewah_and_not(
- struct ewah_bitmap *ewah_i,
- struct ewah_bitmap *ewah_j,
- struct ewah_bitmap *out);
-
void ewah_xor(
struct ewah_bitmap *ewah_i,
struct ewah_bitmap *ewah_j,
struct ewah_bitmap *out);
-void ewah_and(
- struct ewah_bitmap *ewah_i,
- struct ewah_bitmap *ewah_j,
- struct ewah_bitmap *out);
-
/**
* Direct word access
*/
@@ -205,7 +173,6 @@ struct bitmap {
struct bitmap *bitmap_new(void);
void bitmap_set(struct bitmap *self, size_t pos);
-void bitmap_clear(struct bitmap *self, size_t pos);
int bitmap_get(struct bitmap *self, size_t pos);
void bitmap_reset(struct bitmap *self);
void bitmap_free(struct bitmap *self);
@@ -219,7 +186,6 @@ void bitmap_and_not(struct bitmap *self, struct bitmap *other);
void bitmap_or_ewah(struct bitmap *self, struct ewah_bitmap *other);
void bitmap_or(struct bitmap *self, const struct bitmap *other);
-void bitmap_each_bit(struct bitmap *self, ewah_callback callback, void *data);
size_t bitmap_popcount(struct bitmap *self);
#endif
diff --git a/ewah/ewok_rlw.h b/ewah/ewok_rlw.h
index 63efdf9698..bafa24f4c3 100644
--- a/ewah/ewok_rlw.h
+++ b/ewah/ewok_rlw.h
@@ -14,12 +14,13 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __EWOK_RLW_H__
#define __EWOK_RLW_H__
+#include "ewok.h"
+
#define RLW_RUNNING_BITS (sizeof(eword_t) * 4)
#define RLW_LITERAL_BITS (sizeof(eword_t) * 8 - 1 - RLW_RUNNING_BITS)
@@ -30,7 +31,7 @@
#define RLW_RUNNING_LEN_PLUS_BIT (((eword_t)1 << (RLW_RUNNING_BITS + 1)) - 1)
-static int rlw_get_run_bit(const eword_t *word)
+static inline int rlw_get_run_bit(const eword_t *word)
{
return *word & (eword_t)1;
}
@@ -99,7 +100,6 @@ void rlwit_init(struct rlw_iterator *it, struct ewah_bitmap *bitmap);
void rlwit_discard_first_words(struct rlw_iterator *it, size_t x);
size_t rlwit_discharge(
struct rlw_iterator *it, struct ewah_bitmap *out, size_t max, int negate);
-void rlwit_discharge_empty(struct rlw_iterator *it, struct ewah_bitmap *out);
static inline size_t rlwit_word_size(struct rlw_iterator *it)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-19 00:38:30 +0000