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Compare integers in ziplist regardless of encoding

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Because of the introduction of new integer encoding types for ziplists
in the 2.6 tree, the same integer value may have a different encoding in
different versions of the ziplist implementation. This means that the
encoding can NOT be used as a fast path in comparing integers.
This commit is contained in:
Pieter Noordhuis 2012-05-04 17:26:24 -07:00 committed by antirez
parent abf54ee73c
commit bf21941686
1 changed files with 4 additions and 5 deletions
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9
src/ziplist.c
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@ -773,12 +773,11 @@ unsigned int ziplistCompare(unsigned char *p, unsigned char *sstr, unsigned int
return 0;
}
} else {
/* Try to compare encoded values */
/* Try to compare encoded values. Don't compare encoding because
* different implementations may encoded integers differently. */
if (zipTryEncoding(sstr,slen,&sval,&sencoding)) {
if (entry.encoding == sencoding) {
zval = zipLoadInteger(p+entry.headersize,entry.encoding);
return zval == sval;
}
zval = zipLoadInteger(p+entry.headersize,entry.encoding);
return zval == sval;
}
}
return 0;