91 lines
2.0 KiB
C++
91 lines
2.0 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "file.h"
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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namespace android {
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File::File()
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: mInitCheck(NO_INIT),
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mFd(-1) {
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}
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File::File(const char *path, const char *mode)
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: mInitCheck(NO_INIT),
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mFd(-1) {
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mInitCheck = setTo(path, mode);
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}
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File::~File() {
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close();
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}
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status_t File::initCheck() const {
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return mInitCheck;
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}
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status_t File::setTo(const char *path, const char *mode) {
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close();
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int modeval = 0;
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if (!strcmp("r", mode)) {
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modeval = O_RDONLY;
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} else if (!strcmp("w", mode)) {
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modeval = O_WRONLY | O_CREAT | O_TRUNC;
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} else if (!strcmp("rw", mode)) {
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modeval = O_RDWR | O_CREAT;
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}
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int filemode = 0;
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if (modeval & O_CREAT) {
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filemode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH;
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}
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mFd = open(path, modeval, filemode);
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mInitCheck = (mFd >= 0) ? OK : -errno;
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return mInitCheck;
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}
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void File::close() {
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if (mFd >= 0) {
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::close(mFd);
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mFd = -1;
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}
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mInitCheck = NO_INIT;
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}
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ssize_t File::read(void *data, size_t size) {
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return ::read(mFd, data, size);
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}
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ssize_t File::write(const void *data, size_t size) {
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return ::write(mFd, data, size);
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}
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off64_t File::seekTo(off64_t pos, int whence) {
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off64_t new_pos = lseek64(mFd, pos, whence);
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return new_pos < 0 ? -errno : new_pos;
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}
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} // namespace android
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