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| author | dkf <donal.k.fellows@manchester.ac.uk> | 2012-03-02 10:05:57 (GMT) |
|---|---|---|
| committer | dkf <donal.k.fellows@manchester.ac.uk> | 2012-03-02 10:05:57 (GMT) |
| commit | 714ba439a2a5271a913fede2596c072cb2564516 (patch) | |
| tree | 30dfc48f60bab6290e1e11d4c98c287f61b3ffa4 /generic/tclBinary.c | |
| parent | c6d76efcfbaa9d03aeaecec19843a745556dcb18 (diff) | |
| download | tcl-714ba439a2a5271a913fede2596c072cb2564516.zip tcl-714ba439a2a5271a913fede2596c072cb2564516.tar.gz tcl-714ba439a2a5271a913fede2596c072cb2564516.tar.bz2 | |
(Tcl_SetByteArrayObj): Only zero out the memory block if it is not being
immediately overwritten. Thanks to Stuart Cassoff for spotting.
Diffstat (limited to 'generic/tclBinary.c')
| -rw-r--r-- | generic/tclBinary.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/generic/tclBinary.c b/generic/tclBinary.c index 0a340f2..444e7fa 100644 --- a/generic/tclBinary.c +++ b/generic/tclBinary.c @@ -305,11 +305,14 @@ Tcl_SetByteArrayObj( length = (length < 0) ? 0 : length; byteArrayPtr = ckalloc(BYTEARRAY_SIZE(length)); - memset(byteArrayPtr, 0, BYTEARRAY_SIZE(length)); byteArrayPtr->used = length; byteArrayPtr->allocated = length; - if (bytes && length) { - memcpy(byteArrayPtr->bytes, bytes, (size_t) length); + if (length) { + if (bytes) { + memcpy(byteArrayPtr->bytes, bytes, (size_t) length); + } else { + memset(byteArrayPtr->bytes, 0, (size_t) length); + } } objPtr->typePtr = &tclByteArrayType; |