NS_IMETHODIMP
nsDOMMultipartBlob::GetSize(PRUint64* aLength)
{
nsresult rv;
*aLength = 0;
if (mLength) {
*aLength = mLength;
return NS_OK;
}
CheckedUint64 length = 0;
PRUint32 i;
PRUint32 len = mBlobs.Length();
for (i = 0; i < len; i++) {
nsIDOMBlob* blob = mBlobs.ElementAt(i).get();
PRUint64 l = 0;
rv = blob->GetSize(&l);
NS_ENSURE_SUCCESS(rv, rv);
length += l;
}
if (!length.valid())
return NS_ERROR_FAILURE;
mLength = length.value();
*aLength = mLength;
return NS_OK;
}
NS_IMETHODIMP
nsDOMMultipartFile::GetSize(PRUint64* aLength)
{
if (mLength == UINT64_MAX) {
CheckedUint64 length = 0;
PRUint32 i;
PRUint32 len = mBlobs.Length();
for (i = 0; i < len; i++) {
nsIDOMBlob* blob = mBlobs.ElementAt(i).get();
PRUint64 l = 0;
nsresult rv = blob->GetSize(&l);
NS_ENSURE_SUCCESS(rv, rv);
length += l;
}
NS_ENSURE_TRUE(length.valid(), NS_ERROR_FAILURE);
mLength = length.value();
}
*aLength = mLength;
return NS_OK;
}
// Makes sure that aStart and aStart + aLength is less then or equal to aSize
void
ClampToSize(PRUint64 aSize, PRUint64& aStart, PRUint64& aLength)
{
if (aStart > aSize) {
aStart = aLength = 0;
}
CheckedUint64 endOffset = aStart;
endOffset += aLength;
if (!endOffset.valid() || endOffset.value() > aSize) {
aLength = aSize - aStart;
}
}