/*
* Copyright ( C ) 2015 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 "file.h"
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
namespace android {
File::File()
: mInitCheck(NO_INIT),
mFd(-1 ) {
}
File::File(const char *path, const char *mode)
: mInitCheck(NO_INIT),
mFd(-1 ) {
mInitCheck = setTo(path, mode);
}
File::~File() {
close();
}
status_t File::initCheck() const {
return mInitCheck;
}
status_t File::setTo(const char *path, const char *mode) {
close();
int modeval = 0 ;
if (!strcmp("r" , mode)) {
modeval = O_RDONLY;
} else if (!strcmp("w" , mode)) {
modeval = O_WRONLY | O_CREAT | O_TRUNC;
} else if (!strcmp("rw" , mode)) {
modeval = O_RDWR | O_CREAT;
}
int filemode = 0 ;
if (modeval & O_CREAT) {
filemode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH;
}
mFd = open(path, modeval, filemode);
mInitCheck = (mFd >= 0 ) ? OK : -errno;
return mInitCheck;
}
void File::close() {
if (mFd >= 0 ) {
::close(mFd);
mFd = -1 ;
}
mInitCheck = NO_INIT;
}
ssize_t File::read(void *data, size_t size) {
return ::read(mFd, data, size);
}
ssize_t File::write(const void *data, size_t size) {
return ::write(mFd, data, size);
}
off64_t File::seekTo(off64_t pos, int whence) {
off64_t new_pos = lseek64(mFd, pos, whence);
return new_pos < 0 ? -errno : new_pos;
}
} // namespace android
Messung V0.5 in Prozent C=91 H=95 G=92
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(vorverarbeitet am 2026-06-27)
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