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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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.
#ifndef INCLUDED_THIRD_PARTY_IJAR_MAPPED_FILE_H
#define INCLUDED_THIRD_PARTY_IJAR_MAPPED_FILE_H
#include "third_party/ijar/common.h"
namespace devtools_ijar {
struct MappedInputFileImpl;
struct MappedOutputFileImpl;
// A memory mapped input file.
class MappedInputFile {
private:
MappedInputFileImpl *impl_;
protected:
const char* errmsg_;
bool opened_;
u1* buffer_;
size_t length_;
public:
MappedInputFile(const char* name);
virtual ~MappedInputFile();
// If opening the file succeeded or not.
bool Opened() const { return opened_; }
// Description of the last error that happened.
const char* Error() const { return errmsg_; }
// The mapped contents of the file.
u1* Buffer() const { return buffer_ ; }
// The length of the file.
size_t Length() const { return length_; }
// Unmap a given number of bytes from the beginning of the file.
void Discard(size_t bytes);
int Close();
};
class MappedOutputFile {
private:
MappedOutputFileImpl *impl_;
protected:
const char* errmsg_;
bool opened_;
u1* buffer_;
size_t estimated_size_;
public:
MappedOutputFile(const char* name, size_t estimated_size);
virtual ~MappedOutputFile();
// If opening the file succeeded or not.
bool Opened() const { return opened_; }
// Description of the last error that happened.
const char* Error() const { return errmsg_; }
// The mapped contents of the file.
u1* Buffer() const { return buffer_; }
int Close(size_t size);
};
} // namespace devtools_ijar
#endif
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