milvus/internal/storage/cwrapper/PayloadStream.cpp

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#include "PayloadStream.h"
namespace wrapper {
PayloadOutputStream::PayloadOutputStream() {
buffer_.reserve(1024 * 1024);
closed_ = false;
}
PayloadOutputStream::~PayloadOutputStream() noexcept {
}
arrow::Status PayloadOutputStream::Close() {
closed_ = true;
return arrow::Status::OK();
}
arrow::Result<int64_t> PayloadOutputStream::Tell() const {
return arrow::Result<int64_t>(buffer_.size());
}
bool PayloadOutputStream::closed() const {
return closed_;
}
arrow::Status PayloadOutputStream::Write(const void *data, int64_t nbytes) {
if (nbytes <= 0) return arrow::Status::OK();
auto size = buffer_.size();
buffer_.resize(size + nbytes);
std::memcpy(buffer_.data() + size, data, nbytes);
return arrow::Status::OK();
}
arrow::Status PayloadOutputStream::Flush() {
return arrow::Status::OK();
}
const std::vector<uint8_t> &PayloadOutputStream::Buffer() const {
return buffer_;
}
PayloadInputStream::PayloadInputStream(const uint8_t *data, int64_t size) :
data_(data), size_(size), tell_(0), closed_(false) {
}
PayloadInputStream::~PayloadInputStream() noexcept {
}
arrow::Status PayloadInputStream::Close() {
closed_ = true;
return arrow::Status::OK();
}
bool PayloadInputStream::closed() const {
return closed_;
}
arrow::Result<int64_t> PayloadInputStream::Tell() const {
return arrow::Result<int64_t>(tell_);
}
arrow::Status PayloadInputStream::Seek(int64_t position) {
if (position < 0 || position >= size_) return arrow::Status::IOError("invalid position");
tell_ = position;
return arrow::Status::OK();
}
arrow::Result<int64_t> PayloadInputStream::Read(int64_t nbytes, void *out) {
auto remain = size_ - tell_;
if (nbytes > remain) nbytes = remain;
std::memcpy(out, data_ + tell_, nbytes);
tell_ += nbytes;
return arrow::Result<int64_t>(nbytes);
}
arrow::Result<std::shared_ptr<arrow::Buffer>> PayloadInputStream::Read(int64_t nbytes) {
auto remain = size_ - tell_;
if (nbytes > remain) nbytes = remain;
auto buf = std::make_shared<arrow::Buffer>(data_ + tell_, nbytes);
tell_ += nbytes;
return arrow::Result<std::shared_ptr<arrow::Buffer>>(buf);
}
arrow::Result<int64_t> PayloadInputStream::GetSize() {
return arrow::Result<int64_t>(size_);
}
}