filestream.cc
上传用户:quxuerui
上传日期:2018-01-08
资源大小:41811k
文件大小:2k
- /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you 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 "filestream.hh"
- using namespace hadoop;
- hadoop::FileInStream::FileInStream()
- {
- mFile = NULL;
- }
- bool hadoop::FileInStream::open(const std::string& name)
- {
- mFile = fopen(name.c_str(), "rb");
- return (mFile != NULL);
- }
- ssize_t hadoop::FileInStream::read(void *buf, size_t len)
- {
- return fread(buf, 1, len, mFile);
- }
- bool hadoop::FileInStream::skip(size_t nbytes)
- {
- return (0==fseek(mFile, nbytes, SEEK_CUR));
- }
- bool hadoop::FileInStream::close()
- {
- int ret = fclose(mFile);
- mFile = NULL;
- return (ret==0);
- }
- hadoop::FileInStream::~FileInStream()
- {
- if (mFile != NULL) {
- close();
- }
- }
- hadoop::FileOutStream::FileOutStream()
- {
- mFile = NULL;
- }
- bool hadoop::FileOutStream::open(const std::string& name, bool overwrite)
- {
- if (!overwrite) {
- mFile = fopen(name.c_str(), "rb");
- if (mFile != NULL) {
- fclose(mFile);
- return false;
- }
- }
- mFile = fopen(name.c_str(), "wb");
- return (mFile != NULL);
- }
- ssize_t hadoop::FileOutStream::write(const void* buf, size_t len)
- {
- return fwrite(buf, 1, len, mFile);
- }
- bool hadoop::FileOutStream::advance(size_t nbytes)
- {
- return (0==fseek(mFile, nbytes, SEEK_CUR));
- }
- bool hadoop::FileOutStream::close()
- {
- int ret = fclose(mFile);
- mFile = NULL;
- return (ret == 0);
- }
- hadoop::FileOutStream::~FileOutStream()
- {
- if (mFile != NULL) {
- close();
- }
- }