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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <hicn/transport/core/manifest_format.h>
namespace utils {
class SuffixStrategy {
public:
SuffixStrategy(
transport::core::NextSegmentCalculationStrategy suffix_stragegy,
std::uint32_t start_offset)
: suffix_stragegy_(suffix_stragegy),
suffix_(start_offset),
nb_segments_(0) {}
transport::core::NextSegmentCalculationStrategy getSuffixStrategy() {
return suffix_stragegy_;
}
void setSuffixStrategy(
transport::core::NextSegmentCalculationStrategy strategy) {
suffix_stragegy_ = strategy;
}
std::uint32_t getSuffix() { return suffix_; }
void updateSuffix(std::uint32_t new_suffix) { suffix_ = new_suffix; }
std::size_t getNbSegments() { return nb_segments_; }
void setNbSegments(std::size_t nb_segments) { nb_segments_ = nb_segments; }
void reset(std::uint32_t reset_suffix) {
suffix_ = reset_suffix;
nb_segments_ = 0;
}
~SuffixStrategy() {}
protected:
transport::core::NextSegmentCalculationStrategy suffix_stragegy_;
std::uint32_t suffix_;
std::size_t nb_segments_;
virtual std::uint32_t getNextSuffix() = 0;
};
class SuffixManifest : public SuffixStrategy {
public:
SuffixManifest(
transport::core::NextSegmentCalculationStrategy suffix_stragegy,
std::uint32_t start_offset)
: SuffixStrategy(suffix_stragegy, start_offset) {}
SuffixManifest operator++() {
updateSuffix(getNextSuffix());
SuffixManifest temp_suffix(suffix_stragegy_, suffix_);
temp_suffix.setNbSegments(getNbSegments());
return temp_suffix;
}
SuffixManifest operator++(int) {
SuffixManifest temp_suffix(suffix_stragegy_, suffix_);
temp_suffix.setNbSegments(getNbSegments());
updateSuffix(getNextSuffix());
return temp_suffix;
}
protected:
std::uint32_t getNextSuffix();
};
class SuffixContent : public SuffixStrategy {
public:
SuffixContent(transport::core::NextSegmentCalculationStrategy suffix_stragegy,
std::uint32_t start_offset, bool making_manifest)
: SuffixStrategy(suffix_stragegy, start_offset),
making_manifest_(making_manifest),
content_counter_(0) {}
SuffixContent(transport::core::NextSegmentCalculationStrategy suffix_stragegy,
std::uint32_t start_offset)
: SuffixContent(suffix_stragegy, start_offset, false) {}
SuffixContent operator++() {
updateSuffix(getNextSuffix());
SuffixContent temp_suffix(suffix_stragegy_, suffix_, making_manifest_);
temp_suffix.setNbSegments(getNbSegments());
temp_suffix.content_counter_ = content_counter_;
return temp_suffix;
}
SuffixContent operator++(int) {
SuffixContent temp_suffix(suffix_stragegy_, suffix_, making_manifest_);
temp_suffix.setNbSegments(getNbSegments());
temp_suffix.content_counter_ = content_counter_;
updateSuffix(getNextSuffix());
return temp_suffix;
}
void setUsingManifest(bool value) { making_manifest_ = value; }
void reset(std::uint32_t reset_suffix) {
SuffixStrategy::reset(reset_suffix);
content_counter_ = 0;
}
protected:
bool making_manifest_;
/* content_counter_ keeps track of the number of segments */
/* between two manifests */
uint32_t content_counter_;
std::uint32_t getNextSuffix();
};
} // namespace utils
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