mirror of
https://github.com/vgough/encfs.git
synced 2024-11-22 16:03:34 +01:00
7799c88df6
git-svn-id: http://encfs.googlecode.com/svn/trunk@93 db9cf616-1c43-0410-9cb8-a902689de0d6
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
|
|
/*****************************************************************************
|
|
* Author: Valient Gough <vgough@pobox.com>
|
|
*
|
|
*****************************************************************************
|
|
* Copyright (c) 2012 Valient Gough
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify it under
|
|
* the terms of the GNU Lesser General Public License as published by the Free
|
|
* Software Foundation, either version 3 of the License, or (at your option) any
|
|
* later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "fs/MemFileIO.h"
|
|
|
|
#include "base/Error.h"
|
|
|
|
#include <glog/logging.h>
|
|
|
|
namespace encfs {
|
|
|
|
static Interface MemFileIO_iface = makeInterface("FileIO/Mem", 1, 0, 0);
|
|
|
|
MemFileIO* NewMemFileIO(const Interface& iface) {
|
|
(void)iface;
|
|
return new MemFileIO(0);
|
|
}
|
|
|
|
MemFileIO::MemFileIO(int size)
|
|
: writable(false) {
|
|
buf.resize(size);
|
|
}
|
|
|
|
MemFileIO::~MemFileIO() {
|
|
}
|
|
|
|
Interface MemFileIO::interface() const {
|
|
return MemFileIO_iface;
|
|
}
|
|
|
|
void MemFileIO::setFileName(const char *name) {
|
|
this->name = name;
|
|
}
|
|
|
|
const char *MemFileIO::getFileName() const {
|
|
return name.c_str();
|
|
}
|
|
|
|
int MemFileIO::open(int flags) {
|
|
bool requestWrite = ((flags & O_RDWR) || (flags & O_WRONLY));
|
|
|
|
writable = writable || requestWrite;
|
|
LOG(ERROR) << "returning fake file descriptor";
|
|
return 0;
|
|
}
|
|
|
|
int MemFileIO::getAttr(struct stat* stbuf) const {
|
|
stbuf->st_size = buf.size();
|
|
return 0;
|
|
}
|
|
|
|
off_t MemFileIO::getSize() const {
|
|
return buf.size();
|
|
}
|
|
|
|
ssize_t MemFileIO::read(const IORequest& req) const {
|
|
rAssert(req.offset >= 0);
|
|
|
|
int len = req.dataLen;
|
|
if (req.offset + req.dataLen > getSize()) {
|
|
len = getSize() - req.offset;
|
|
}
|
|
if (len < 0) {
|
|
len = 0;
|
|
}
|
|
|
|
memcpy(req.data, &buf[req.offset], len);
|
|
return len;
|
|
}
|
|
|
|
bool MemFileIO::write(const IORequest& req) {
|
|
rAssert(req.offset >= 0);
|
|
if (req.offset + req.dataLen > getSize()) {
|
|
truncate(req.offset + req.dataLen);
|
|
}
|
|
rAssert(req.offset + req.dataLen <= getSize());
|
|
|
|
memcpy(&buf[req.offset], req.data, req.dataLen);
|
|
return true;
|
|
}
|
|
|
|
int MemFileIO::truncate(off_t size) {
|
|
buf.resize(size);
|
|
return 0;
|
|
}
|
|
|
|
bool MemFileIO::isWritable() const {
|
|
return writable;
|
|
}
|
|
|
|
} // namespace encfs
|