-uint64_t decodeVarintFromCursor(folly::io::Cursor& cursor) {
- // Must have enough room in *this* buffer.
- auto p = cursor.peek();
- folly::ByteRange range(p.first, p.second);
- uint64_t val = decodeVarint(range);
- cursor.skip(range.data() - p.first);
+inline uint64_t decodeVarintFromCursor(folly::io::Cursor& cursor) {
+ uint64_t val = 0;
+ int8_t b = 0;
+ for (int shift = 0; shift <= 63; shift += 7) {
+ b = cursor.read<int8_t>();
+ val |= static_cast<uint64_t>(b & 0x7f) << shift;
+ if (b >= 0) {
+ break;
+ }
+ }
+ if (b < 0) {
+ throw std::invalid_argument("Invalid varint value. Too big.");
+ }