folly::StringPiece getRange(const folly::IOBuf& buf) {
assert(!buf.isChained());
return {reinterpret_cast<const char*>(buf.data()), buf.length()};
}
bool hasSameMemoryRegion(const folly::IOBuf& buf, folly::StringPiece range) {
return !buf.isChained() &&
(buf.length() == 0 ||
(range.begin() == reinterpret_cast<const char*>(buf.data()) &&
range.size() == buf.length()));
}
bool hasSameMemoryRegion(const folly::IOBuf& a, const folly::IOBuf& b) {
return !a.isChained() && !b.isChained() &&
((a.length() == 0 && b.length() == 0) ||
(a.data() == b.data() && a.length() == b.length()));
}