mirror of
https://gitee.com/milvus-io/milvus.git
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103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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#include "PayloadStream.h"
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namespace wrapper {
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PayloadOutputStream::PayloadOutputStream() {
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buffer_.reserve(1024 * 1024);
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closed_ = false;
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}
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PayloadOutputStream::~PayloadOutputStream() noexcept {
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}
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arrow::Status PayloadOutputStream::Close() {
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closed_ = true;
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return arrow::Status::OK();
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}
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arrow::Result<int64_t> PayloadOutputStream::Tell() const {
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return arrow::Result<int64_t>(buffer_.size());
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}
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bool PayloadOutputStream::closed() const {
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return closed_;
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}
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arrow::Status PayloadOutputStream::Write(const void *data, int64_t nbytes) {
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if (nbytes <= 0) return arrow::Status::OK();
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auto size = buffer_.size();
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buffer_.resize(size + nbytes);
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std::memcpy(buffer_.data() + size, data, nbytes);
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return arrow::Status::OK();
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}
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arrow::Status PayloadOutputStream::Flush() {
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return arrow::Status::OK();
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}
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const std::vector<uint8_t> &PayloadOutputStream::Buffer() const {
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return buffer_;
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}
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PayloadInputStream::PayloadInputStream(const uint8_t *data, int64_t size) :
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data_(data), size_(size), tell_(0), closed_(false) {
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}
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PayloadInputStream::~PayloadInputStream() noexcept {
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}
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arrow::Status PayloadInputStream::Close() {
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closed_ = true;
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return arrow::Status::OK();
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}
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bool PayloadInputStream::closed() const {
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return closed_;
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}
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arrow::Result<int64_t> PayloadInputStream::Tell() const {
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return arrow::Result<int64_t>(tell_);
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}
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arrow::Status PayloadInputStream::Seek(int64_t position) {
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if (position < 0 || position >= size_) return arrow::Status::IOError("invalid position");
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tell_ = position;
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return arrow::Status::OK();
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}
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arrow::Result<int64_t> PayloadInputStream::Read(int64_t nbytes, void *out) {
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auto remain = size_ - tell_;
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if (nbytes > remain) nbytes = remain;
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std::memcpy(out, data_ + tell_, nbytes);
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tell_ += nbytes;
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return arrow::Result<int64_t>(nbytes);
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}
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arrow::Result<std::shared_ptr<arrow::Buffer>> PayloadInputStream::Read(int64_t nbytes) {
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auto remain = size_ - tell_;
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if (nbytes > remain) nbytes = remain;
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auto buf = std::make_shared<arrow::Buffer>(data_ + tell_, nbytes);
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tell_ += nbytes;
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return arrow::Result<std::shared_ptr<arrow::Buffer>>(buf);
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}
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arrow::Result<int64_t> PayloadInputStream::GetSize() {
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return arrow::Result<int64_t>(size_);
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}
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}
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