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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifdef __PSP__
#include "backends/fs/psp/psp-stream.h"
#include "backends/platform/psp/trace.h"
#include <errno.h>
PSPIoStream::PSPIoStream(const Common::String &path, bool writeMode)
: StdioStream((void *)1), _path(path), _writeMode(writeMode) {
assert(!path.empty());
_handle = (void *)0; // Need to do this since base class asserts not 0.
PowerMan.registerSuspend(this); // Register with the powermanager to be suspended
}
PSPIoStream::~PSPIoStream() {
PowerMan.unregisterSuspend(this); // Unregister with powermanager to be suspended
// Must do this before fclose() or resume() will reopen.
fclose((FILE *)_handle);
}
// Function to open the file pointed to by the path.
//
//
void * PSPIoStream::open() {
if (PowerMan.beginCriticalSection()==PowerManager::Blocked) {
// No need to open. Just return the _handle resume() already opened.
PSPDebugTrace("Suspended in PSPIoStream::open\n");
} else {
_handle = fopen(_path.c_str(), _writeMode ? "wb" : "rb"); // open
}
PowerMan.endCriticalSection();
return _handle;
}
bool PSPIoStream::err() const {
bool ret;
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::err()\n");
ret = ferror((FILE *)_handle) != 0;
PowerMan.endCriticalSection();
return ret;
}
void PSPIoStream::clearErr() {
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::clearErr()\n");
clearerr((FILE *)_handle);
PowerMan.endCriticalSection();
}
bool PSPIoStream::eos() const {
bool ret;
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::eos()\n");
ret = feof((FILE *)_handle) != 0;
PowerMan.endCriticalSection();
return ret;
}
int32 PSPIoStream::pos() const {
int32 ret;
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::pos()\n");
ret = ftell((FILE *)_handle);
PowerMan.endCriticalSection();
return ret;
}
int32 PSPIoStream::size() const {
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::size()\n");
int32 oldPos = ftell((FILE *)_handle);
fseek((FILE *)_handle, 0, SEEK_END);
int32 length = ftell((FILE *)_handle);
fseek((FILE *)_handle, oldPos, SEEK_SET);
PowerMan.endCriticalSection();
return length;
}
bool PSPIoStream::seek(int32 offs, int whence) {
int ret = 0;
// Check if we can access the file
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::seek()\n");
ret = fseek((FILE *)_handle, offs, whence);
PowerMan.endCriticalSection();
return ret == 0;
}
uint32 PSPIoStream::read(void *ptr, uint32 len) {
int ret = 0;
// Check if we can access the file
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::read()\n");
ret = fread((byte *)ptr, 1, len, (FILE *)_handle);
PowerMan.endCriticalSection();
return ret;
}
uint32 PSPIoStream::write(const void *ptr, uint32 len) {
int ret = 0;
// Check if we can access the file
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::read()\n");
ret = fwrite(ptr, 1, len, (FILE *)_handle);
PowerMan.endCriticalSection();
return ret;
}
bool PSPIoStream::flush() {
int ret = 0;
// Check if we can access the file
if (PowerMan.beginCriticalSection() == PowerManager::Blocked)
PSPDebugTrace("Suspended in PSPIoStream::read()\n");
ret = fflush((FILE *)_handle);
PowerMan.endCriticalSection();
return ret == 0;
}
// For the PSP, since we're building in suspend support, we moved opening
// the actual file to an open function since we need an actual PSPIoStream object to suspend.
//
PSPIoStream *PSPIoStream::makeFromPath(const Common::String &path, bool writeMode) {
PSPIoStream *stream = new PSPIoStream(path, writeMode);
if (stream->open() > 0) {
return stream;
} else {
delete stream;
return 0;
}
}
/*
* Function to suspend the IO stream (called by PowerManager)
*/
int PSPIoStream::suspend() {
if (_handle > 0) {
_pos = ftell((FILE *)_handle); // Save our position
fclose((FILE *)_handle); // close our file descriptor
_handle = 0; // Set handle to null
}
return 0;
}
/*
* Function to resume the IO stream (called by Power Manager)
*/
int PSPIoStream::resume() {
int ret = 0;
// We reopen our file descriptor
_handle = fopen(_path.c_str(), _writeMode ? "wb" : "rb");
if (_handle <= 0) {
PSPDebugTrace("PSPIoStream::resume(): Couldn't reopen file %s\n", _path.c_str());
ret = -1;
}
// Resume our previous position
if(_handle > 0) fseek((FILE *)_handle, _pos, SEEK_SET);
return ret;
}
#endif /* __PSP__ */
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