diff options
Diffstat (limited to 'ewah')
-rw-r--r-- | ewah/bitmap.c | 24 | ||||
-rw-r--r-- | ewah/ewah_bitmap.c | 22 | ||||
-rw-r--r-- | ewah/ewah_io.c | 17 | ||||
-rw-r--r-- | ewah/ewok.h | 10 |
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); |