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author | unknown <tulin@dl145b.mysql.com> | 2005-07-19 21:56:10 +0200 |
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committer | unknown <tulin@dl145b.mysql.com> | 2005-07-19 21:56:10 +0200 |
commit | 8707870dd9591da198d9b9efa864d489e2f6764a (patch) | |
tree | 91e9f17b6b183df5ad37be93a13365d7d0f0d7f8 /mysys/my_bitmap.c | |
parent | 7267d06061d2c120eef9ca5d627f9935113a308b (diff) | |
parent | cd4bce0244f588798060a6f04c004edfcc8c2b94 (diff) | |
download | mariadb-git-8707870dd9591da198d9b9efa864d489e2f6764a.tar.gz |
merge
BUILD/autorun.sh:
Auto merged
BitKeeper/deleted/.del-var:
Delete: mysql-test/var
BitKeeper/etc/config:
Auto merged
configure.in:
Auto merged
mysql-test/r/information_schema_db.result:
Auto merged
mysys/Makefile.am:
Auto merged
mysys/default.c:
Auto merged
sql/ha_berkeley.cc:
Auto merged
sql/ha_berkeley.h:
Auto merged
sql/ha_federated.h:
Auto merged
sql/ha_innodb.cc:
Auto merged
sql/ha_innodb.h:
Auto merged
sql/ha_myisam.cc:
Auto merged
sql/ha_myisammrg.cc:
Auto merged
sql/ha_ndbcluster.cc:
Auto merged
sql/handler.h:
Auto merged
sql/item.cc:
Auto merged
sql/lex.h:
Auto merged
sql/lock.cc:
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sql/log.cc:
Auto merged
sql/log_event.cc:
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sql/mysql_priv.h:
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sql/mysqld.cc:
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sql/opt_range.cc:
Auto merged
sql/set_var.cc:
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sql/sp.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_bitmap.h:
Auto merged
sql/sql_cache.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_prepare.cc:
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sql/sql_repl.cc:
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sql/sql_select.cc:
Auto merged
sql/sql_select.h:
Auto merged
sql/sql_show.cc:
Auto merged
sql/examples/ha_tina.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/table.h:
Auto merged
storage/myisam/mi_check.c:
Auto merged
storage/myisam/mi_create.c:
Auto merged
storage/myisam/mi_delete.c:
Auto merged
storage/myisam/mi_extra.c:
Auto merged
storage/myisam/mi_open.c:
Auto merged
storage/myisam/mi_preload.c:
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storage/myisam/mi_rsame.c:
Auto merged
storage/myisam/mi_rsamepos.c:
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storage/myisam/mi_search.c:
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storage/myisam/mi_update.c:
Auto merged
storage/myisam/mi_write.c:
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storage/myisam/myisamchk.c:
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storage/myisam/myisamdef.h:
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storage/myisam/myisamlog.c:
Auto merged
storage/myisam/myisampack.c:
Auto merged
storage/myisam/sort.c:
Auto merged
storage/ndb/src/common/portlib/NdbMutex.c:
Auto merged
storage/ndb/src/common/portlib/NdbThread.c:
Auto merged
support-files/mysql.spec.sh:
Auto merged
Diffstat (limited to 'mysys/my_bitmap.c')
-rw-r--r-- | mysys/my_bitmap.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/mysys/my_bitmap.c b/mysys/my_bitmap.c index b5f928fee1e..ec03e345109 100644 --- a/mysys/my_bitmap.c +++ b/mysys/my_bitmap.c @@ -202,6 +202,7 @@ my_bool bitmap_test_and_set(MY_BITMAP *map, uint bitmap_bit) bitmap_lock(map); res= bitmap_fast_test_and_set(map, bitmap_bit); bitmap_unlock(map); + return res; } uint bitmap_set_next(MY_BITMAP *map) @@ -327,10 +328,40 @@ void bitmap_intersect(MY_BITMAP *map, const MY_BITMAP *map2) } +/* + Set/clear all bits above a bit. + + SYNOPSIS + bitmap_set_above() + map RETURN The bitmap to change. + from_byte The bitmap buffer byte offset to start with. + use_bit The bit value (1/0) to use for all upper bits. + + NOTE + You can only set/clear full bytes. + The function is meant for the situation that you copy a smaller bitmap + to a bigger bitmap. Bitmap lengths are always multiple of eigth (the + size of a byte). Using 'from_byte' saves multiplication and division + by eight during parameter passing. + + RETURN + void +*/ + +void bitmap_set_above(MY_BITMAP *map, uint from_byte, uint use_bit) +{ + uchar use_byte= use_bit ? 0xff : 0; + uchar *to= map->bitmap + from_byte; + uchar *end= map->bitmap + map->bitmap_size; + + while (to < end) + *to++= use_byte; +} + + void bitmap_subtract(MY_BITMAP *map, const MY_BITMAP *map2) { uint32 *to= map->bitmap, *from= map2->bitmap, *end; - DBUG_ASSERT(map->bitmap && map2->bitmap && map->n_bits==map2->n_bits); |