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/*
* Copyright (C) 2009 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 <vector>
#include "base/unix_file/random_access_file_utils.h"
#include "base/unix_file/random_access_file.h"
namespace unix_file {
bool CopyFile(const RandomAccessFile& src, RandomAccessFile* dst) {
// We don't call src->GetLength because some files (those in /proc, say)
// don't know how long they are. We just read until there's nothing left.
std::vector<char> buf(4096);
int64_t offset = 0;
int64_t n;
while ((n = src.Read(&buf[0], buf.size(), offset)) > 0) {
if (dst->Write(&buf[0], n, offset) != n) {
return false;
}
offset += n;
}
return n >= 0;
}
} // namespace unix_file
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