NS_IMETHODIMP
ArrayBufferInputStream::SetData(JS::Handle<JS::Value> aBuffer,
uint32_t aByteOffset,
uint32_t aLength,
JSContext* aCx)
{
if (!aBuffer.isObject()) {
return NS_ERROR_FAILURE;
}
JS::RootedObject arrayBuffer(aCx, &aBuffer.toObject());
if (!JS_IsArrayBufferObject(arrayBuffer)) {
return NS_ERROR_FAILURE;
}
mArrayBuffer.construct(aCx, aBuffer);
uint32_t buflen = JS_GetArrayBufferByteLength(arrayBuffer);
mOffset = std::min(buflen, aByteOffset);
mBufferLength = std::min(buflen - mOffset, aLength);
mBuffer = JS_GetStableArrayBufferData(aCx, arrayBuffer);
if (!mBuffer) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsBinaryInputStream::ReadArrayBuffer(uint32_t aLength, JS::Handle<JS::Value> aBuffer, JSContext* cx)
{
if (!aBuffer.isObject()) {
return NS_ERROR_FAILURE;
}
JS::RootedObject buffer(cx, &aBuffer.toObject());
if (!JS_IsArrayBufferObject(buffer) ||
JS_GetArrayBufferByteLength(buffer) < aLength) {
return NS_ERROR_FAILURE;
}
uint8_t* data = JS_GetStableArrayBufferData(cx, buffer);
if (!data) {
return NS_ERROR_FAILURE;
}
uint32_t bytesRead;
nsresult rv = Read(reinterpret_cast<char*>(data), aLength, &bytesRead);
if (NS_WARN_IF(NS_FAILED(rv)))
return rv;
if (bytesRead != aLength) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
