Method FindFirst

cpp/src/arrow/json/chunker.cc:127–138

class ParsingBoundaryFinder : public BoundaryFinder {
 public:
  Status FindFirst(string_view partial, string_view block, int64_t* out_pos) override {
    auto length = ConsumeWholeObject(MultiStringStream({partial, block}));
    if (length == string_view::npos) {
      *out_pos = -1;
    } else if (ARROW_PREDICT_FALSE(length < partial.size())) {
      return Status::Invalid("JSON chunk error: invalid data at end of document");
    } else {
      DCHECK_LE(length, partial.size() + block.size());
      *out_pos = static_cast<int64_t>(length - partial.size());
    }
    return Status::OK();
  }

  Status FindLast(std::string_view block, int64_t* out_pos) override {
    const size_t block_length = block.size();