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Reduce redundant memset when resizing ByteVector.

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This commit is contained in:
Tsuda Kageyu
2015-05-16 03:46:34 +09:00
parent a924ca0db7
commit 1f99c93a61
1 changed files with 8 additions and 4 deletions
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12
taglib/toolkit/tbytevector.cpp
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@ -703,11 +703,15 @@ ByteVector &ByteVector::resize(uint size, char padding)
if(size != d->length) {
detach();
if(size > d->data->data.size() - d->offset)
d->data->data.resize(d->offset + size);
const size_t bufferSize = d->data->data.size();
if(size > d->length)
::memset(DATA(d) + d->offset + d->length, padding, size - d->length);
if(size > bufferSize - d->offset) {
d->data->data.resize(d->offset + size, padding);
::memset(&*end(), padding, bufferSize - (d->length + d->offset));
}
else if(size > d->length) {
::memset(&*end(), padding, size - d->length);
}
d->length = size;
}