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//
// Copyright (C) 2020 The Android Open Source Project
//
// 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.
//
#include <libsnapshot/cow_format.h>
#include <sys/types.h>
#include <unistd.h>
#include <android-base/logging.h>
namespace android {
namespace snapshot {
std::ostream& operator<<(std::ostream& os, CowOperation const& op) {
os << "CowOperation(type:";
if (op.type == kCowCopyOp)
os << "kCowCopyOp, ";
else if (op.type == kCowReplaceOp)
os << "kCowReplaceOp, ";
else if (op.type == kCowZeroOp)
os << "kZeroOp, ";
else if (op.type == kCowFooterOp)
os << "kCowFooterOp, ";
else if (op.type == kCowLabelOp)
os << "kCowLabelOp, ";
else if (op.type == kCowClusterOp)
os << "kCowClusterOp ";
else if (op.type == kCowFooterOp)
os << "kCowFooterOp ";
else
os << (int)op.type << "?,";
os << "compression:";
if (op.compression == kCowCompressNone)
os << "kCowCompressNone, ";
else if (op.compression == kCowCompressGz)
os << "kCowCompressGz, ";
else if (op.compression == kCowCompressBrotli)
os << "kCowCompressBrotli, ";
else
os << (int)op.compression << "?, ";
os << "data_length:" << op.data_length << ",\t";
os << "new_block:" << op.new_block << ",\t";
os << "source:" << op.source << ")";
return os;
}
int64_t GetNextOpOffset(const CowOperation& op, uint32_t cluster_ops) {
if (op.type == kCowClusterOp) {
return op.source;
} else if (op.type == kCowReplaceOp && cluster_ops == 0) {
return op.data_length;
} else {
return 0;
}
}
int64_t GetNextDataOffset(const CowOperation& op, uint32_t cluster_ops) {
if (op.type == kCowClusterOp) {
return cluster_ops * sizeof(CowOperation);
} else if (cluster_ops == 0) {
return sizeof(CowOperation);
} else {
return 0;
}
}
bool IsMetadataOp(const CowOperation& op) {
switch (op.type) {
case kCowLabelOp:
case kCowClusterOp:
case kCowFooterOp:
return true;
default:
return false;
}
}
} // namespace snapshot
} // namespace android
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