nsresult
MemoryBlockCache::WriteBlock(uint32_t aBlockIndex,
Span<const uint8_t> aData1,
Span<const uint8_t> aData2)
{
MutexAutoLock lock(mMutex);
size_t offset = BlockIndexToOffset(aBlockIndex);
if (offset + aData1.Length() + aData2.Length() > mBuffer.Length() &&
!mHasGrown) {
LOG("WriteBlock() MEMORYBLOCKCACHE_ERRORS='WriteBlockOverflow'");
Telemetry::Accumulate(Telemetry::HistogramID::MEMORYBLOCKCACHE_ERRORS,
WriteBlockOverflow);
}
if (!EnsureBufferCanContain(offset + aData1.Length() + aData2.Length())) {
LOG("WriteBlock() MEMORYBLOCKCACHE_ERRORS='WriteBlockCannotGrow'");
Telemetry::Accumulate(Telemetry::HistogramID::MEMORYBLOCKCACHE_ERRORS,
WriteBlockCannotGrow);
return NS_ERROR_FAILURE;
}
memcpy(mBuffer.Elements() + offset, aData1.Elements(), aData1.Length());
if (aData2.Length() > 0) {
memcpy(mBuffer.Elements() + offset + aData1.Length(),
aData2.Elements(),
aData2.Length());
}
return NS_OK;
}
already_AddRefed<nsIDocument>
DOMParser::ParseFromBuffer(Span<const uint8_t> aBuf, SupportedType aType,
ErrorResult& aRv)
{
// The new stream holds a reference to the buffer
nsCOMPtr<nsIInputStream> stream;
nsresult rv = NS_NewByteInputStream(getter_AddRefs(stream),
reinterpret_cast<const char *>(aBuf.Elements()),
aBuf.Length(), NS_ASSIGNMENT_DEPEND);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return nullptr;
}
return ParseFromStream(stream, VoidString(), aBuf.Length(), aType, aRv);
}
