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| author | unknown <serg@serg.mylan> | 2003-08-05 21:14:15 +0200 |
|---|---|---|
| committer | unknown <serg@serg.mylan> | 2003-08-05 21:14:15 +0200 |
| commit | eb5f968c455276ba2d13e5b44edadef1294d5ab5 (patch) | |
| tree | 7f824b71d5779659b28c60ef72d0b119daa9ccf9 /isam/open.c | |
| parent | ecc7001fbfc1b30a1bbd856b7a093045ccdf3c00 (diff) | |
| download | mariadb-git-eb5f968c455276ba2d13e5b44edadef1294d5ab5.tar.gz | |
table checksum background:
my_checksum() mysys function
NISAM checksum code moved from mysys to isam/ - it's obsolete
MyISAM checksum code moved to mysys
table's checksum accessible from sql layer
SHOW TABLE STATUS shows checksum (WL#646)
code cleanup
include/my_sys.h:
table checksum background: my_checksum() mysys function
include/myisam.h:
table checksum background: my_checksum() mysys function
MyISAM checksum code moved to mysys
isam/isamchk.c:
table checksum background:
NISAM checksum code moved from mysys to isam/ - it's obsolete
isam/isamdef.h:
table checksum background:
NISAM checksum code moved from mysys to isam/ - it's obsolete
isam/open.c:
table checksum background:
NISAM checksum code moved from mysys to isam/ - it's obsolete
isam/pack_isam.c:
table checksum background:
NISAM checksum code moved from mysys to isam/ - it's obsolete
myisam/mi_checksum.c:
table checksum background: my_checksum() mysys function
MyISAM checksum code moved to mysys
mysys/checksum.c:
table checksum background: my_checksum() mysys function
MyISAM checksum code moved to mysys
sql/ha_myisam.cc:
table checksum background: table's checksum accessible from sql layer
sql/ha_myisam.h:
table checksum background: table's checksum accessible from sql layer
sql/handler.h:
table checksum background: table's checksum accessible from sql layer
code cleanup
sql/sql_lex.h:
table checksum background: table's checksum accessible from sql layer
code cleanup
sql/sql_select.cc:
warning removed
sql/sql_show.cc:
SHOW TABLE STATUS shows checksum (WL#646)
sql/sql_yacc.yy:
cleanup
(DROP TABLES syntax added as a side effect :))
Diffstat (limited to 'isam/open.c')
| -rw-r--r-- | isam/open.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/isam/open.c b/isam/open.c index 48fab27cac1..824fbe804ee 100644 --- a/isam/open.c +++ b/isam/open.c @@ -453,3 +453,22 @@ static void setup_key_functions(register N_KEYDEF *keyinfo) } return; } + +/* + Calculate a long checksum for a memoryblock. Used to verify pack_isam + + SYNOPSIS + checksum() + mem Pointer to memory block + count Count of bytes +*/ + +ulong _nisam_checksum(const byte *mem, uint count) +{ + ulong crc; + for (crc= 0; count-- ; mem++) + crc= ((crc << 1) + *((uchar*) mem)) + + test(crc & ((ulong) 1L << (8*sizeof(ulong)-1))); + return crc; +} + |