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Diffstat (limited to 'ewah')
-rw-r--r--ewah/bitmap.c24
-rw-r--r--ewah/ewah_bitmap.c22
-rw-r--r--ewah/ewah_io.c17
-rw-r--r--ewah/ewok.h10
4 files changed, 44 insertions, 29 deletions
diff --git a/ewah/bitmap.c b/ewah/bitmap.c
index 710e58c1b..47ad6747c 100644
--- a/ewah/bitmap.c
+++ b/ewah/bitmap.c
@@ -20,8 +20,8 @@
#include "git-compat-util.h"
#include "ewok.h"
-#define MASK(x) ((eword_t)1 << (x % BITS_IN_WORD))
-#define BLOCK(x) (x / BITS_IN_WORD)
+#define EWAH_MASK(x) ((eword_t)1 << (x % BITS_IN_EWORD))
+#define EWAH_BLOCK(x) (x / BITS_IN_EWORD)
struct bitmap *bitmap_new(void)
{
@@ -33,7 +33,7 @@ struct bitmap *bitmap_new(void)
void bitmap_set(struct bitmap *self, size_t pos)
{
- size_t block = BLOCK(pos);
+ size_t block = EWAH_BLOCK(pos);
if (block >= self->word_alloc) {
size_t old_size = self->word_alloc;
@@ -45,22 +45,22 @@ void bitmap_set(struct bitmap *self, size_t pos)
(self->word_alloc - old_size) * sizeof(eword_t));
}
- self->words[block] |= MASK(pos);
+ self->words[block] |= EWAH_MASK(pos);
}
void bitmap_clear(struct bitmap *self, size_t pos)
{
- size_t block = BLOCK(pos);
+ size_t block = EWAH_BLOCK(pos);
if (block < self->word_alloc)
- self->words[block] &= ~MASK(pos);
+ self->words[block] &= ~EWAH_MASK(pos);
}
int bitmap_get(struct bitmap *self, size_t pos)
{
- size_t block = BLOCK(pos);
+ size_t block = EWAH_BLOCK(pos);
return block < self->word_alloc &&
- (self->words[block] & MASK(pos)) != 0;
+ (self->words[block] & EWAH_MASK(pos)) != 0;
}
struct ewah_bitmap *bitmap_to_ewah(struct bitmap *bitmap)
@@ -127,7 +127,7 @@ void bitmap_and_not(struct bitmap *self, struct bitmap *other)
void bitmap_or_ewah(struct bitmap *self, struct ewah_bitmap *other)
{
size_t original_size = self->word_alloc;
- size_t other_final = (other->bit_size / BITS_IN_WORD) + 1;
+ size_t other_final = (other->bit_size / BITS_IN_EWORD) + 1;
size_t i = 0;
struct ewah_iterator it;
eword_t word;
@@ -155,17 +155,17 @@ void bitmap_each_bit(struct bitmap *self, ewah_callback callback, void *data)
uint32_t offset;
if (word == (eword_t)~0) {
- for (offset = 0; offset < BITS_IN_WORD; ++offset)
+ for (offset = 0; offset < BITS_IN_EWORD; ++offset)
callback(pos++, data);
} else {
- for (offset = 0; offset < BITS_IN_WORD; ++offset) {
+ 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_WORD;
+ pos += BITS_IN_EWORD;
}
}
}
diff --git a/ewah/ewah_bitmap.c b/ewah/ewah_bitmap.c
index fccb42b52..b522437c0 100644
--- a/ewah/ewah_bitmap.c
+++ b/ewah/ewah_bitmap.c
@@ -102,7 +102,7 @@ size_t ewah_add_empty_words(struct ewah_bitmap *self, int v, size_t number)
if (number == 0)
return 0;
- self->bit_size += number * BITS_IN_WORD;
+ self->bit_size += number * BITS_IN_EWORD;
return add_empty_words(self, v, number);
}
@@ -152,7 +152,7 @@ void ewah_add_dirty_words(
self->buffer_size += can_add;
}
- self->bit_size += can_add * BITS_IN_WORD;
+ self->bit_size += can_add * BITS_IN_EWORD;
if (number - can_add == 0)
break;
@@ -197,7 +197,7 @@ static size_t add_empty_word(struct ewah_bitmap *self, int v)
size_t ewah_add(struct ewah_bitmap *self, eword_t word)
{
- self->bit_size += BITS_IN_WORD;
+ self->bit_size += BITS_IN_EWORD;
if (word == 0)
return add_empty_word(self, 0);
@@ -211,8 +211,8 @@ size_t ewah_add(struct ewah_bitmap *self, eword_t word)
void ewah_set(struct ewah_bitmap *self, size_t i)
{
const size_t dist =
- (i + BITS_IN_WORD) / BITS_IN_WORD -
- (self->bit_size + BITS_IN_WORD - 1) / BITS_IN_WORD;
+ (i + BITS_IN_EWORD) / BITS_IN_EWORD -
+ (self->bit_size + BITS_IN_EWORD - 1) / BITS_IN_EWORD;
assert(i >= self->bit_size);
@@ -222,19 +222,19 @@ void ewah_set(struct ewah_bitmap *self, size_t i)
if (dist > 1)
add_empty_words(self, 0, dist - 1);
- add_literal(self, (eword_t)1 << (i % BITS_IN_WORD));
+ add_literal(self, (eword_t)1 << (i % BITS_IN_EWORD));
return;
}
if (rlw_get_literal_words(self->rlw) == 0) {
rlw_set_running_len(self->rlw,
rlw_get_running_len(self->rlw) - 1);
- add_literal(self, (eword_t)1 << (i % BITS_IN_WORD));
+ add_literal(self, (eword_t)1 << (i % BITS_IN_EWORD));
return;
}
self->buffer[self->buffer_size - 1] |=
- ((eword_t)1 << (i % BITS_IN_WORD));
+ ((eword_t)1 << (i % BITS_IN_EWORD));
/* check if we just completed a stream of 1s */
if (self->buffer[self->buffer_size - 1] == (eword_t)(~0)) {
@@ -255,11 +255,11 @@ void ewah_each_bit(struct ewah_bitmap *self, void (*callback)(size_t, void*), vo
eword_t *word = &self->buffer[pointer];
if (rlw_get_run_bit(word)) {
- size_t len = rlw_get_running_len(word) * BITS_IN_WORD;
+ size_t len = rlw_get_running_len(word) * BITS_IN_EWORD;
for (k = 0; k < len; ++k, ++pos)
callback(pos, payload);
} else {
- pos += rlw_get_running_len(word) * BITS_IN_WORD;
+ pos += rlw_get_running_len(word) * BITS_IN_EWORD;
}
++pointer;
@@ -268,7 +268,7 @@ void ewah_each_bit(struct ewah_bitmap *self, void (*callback)(size_t, void*), vo
int c;
/* todo: zero count optimization */
- for (c = 0; c < BITS_IN_WORD; ++c, ++pos) {
+ for (c = 0; c < BITS_IN_EWORD; ++c, ++pos) {
if ((self->buffer[pointer] & ((eword_t)1 << c)) != 0)
callback(pos, payload);
}
diff --git a/ewah/ewah_io.c b/ewah/ewah_io.c
index f7f700ef5..43481b9c6 100644
--- a/ewah/ewah_io.c
+++ b/ewah/ewah_io.c
@@ -19,6 +19,7 @@
*/
#include "git-compat-util.h"
#include "ewok.h"
+#include "strbuf.h"
int ewah_serialize_native(struct ewah_bitmap *self, int fd)
{
@@ -110,9 +111,21 @@ int ewah_serialize(struct ewah_bitmap *self, int fd)
return ewah_serialize_to(self, write_helper, (void *)(intptr_t)fd);
}
-int ewah_read_mmap(struct ewah_bitmap *self, void *map, size_t len)
+static int write_strbuf(void *user_data, const void *data, size_t len)
{
- uint8_t *ptr = map;
+ struct strbuf *sb = user_data;
+ strbuf_add(sb, data, len);
+ return len;
+}
+
+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)
+{
+ const uint8_t *ptr = map;
size_t i;
self->bit_size = get_be32(ptr);
diff --git a/ewah/ewok.h b/ewah/ewok.h
index 43adeb5c6..6e2c5e1e3 100644
--- a/ewah/ewok.h
+++ b/ewah/ewok.h
@@ -30,8 +30,9 @@
# define ewah_calloc xcalloc
#endif
+struct strbuf;
typedef uint64_t eword_t;
-#define BITS_IN_WORD (sizeof(eword_t) * 8)
+#define BITS_IN_EWORD (sizeof(eword_t) * 8)
/**
* Do not use __builtin_popcountll. The GCC implementation
@@ -47,7 +48,8 @@ static inline uint32_t ewah_bit_popcount64(uint64_t x)
return (x * 0x0101010101010101ULL) >> 56;
}
-#ifdef __GNUC__
+/* __builtin_ctzll was not available until 3.4.0 */
+#if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR > 3))
#define ewah_bit_ctz64(x) __builtin_ctzll(x)
#else
static inline int ewah_bit_ctz64(uint64_t x)
@@ -97,10 +99,10 @@ int ewah_serialize_to(struct ewah_bitmap *self,
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, void *map, size_t len);
-int ewah_read_mmap_native(struct ewah_bitmap *self, void *map, size_t len);
+int ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len);
uint32_t ewah_checksum(struct ewah_bitmap *self);
generated by cgit v1.2.1 (git 2.18.0) at 2024-09-04 22:35:40 +0000