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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.
*
*/
#ifdef __PSP__
#include <pspiofilemgr.h>
#include "backends/platform/psp/powerman.h"
#include "backends/fs/psp/psp-stream.h"
#define MIN2(a,b) ((a < b) ? a : b)
#define MIN3(a,b,c) ( (a < b) ? (a < c ? a : c) : (b < c ? b : c) )
//#define __PSP_PRINT_TO_FILE__ /* For debugging suspend stuff, we have no screen output */
//#define __PSP_DEBUG_FUNCS__ /* For debugging function calls */
//#define __PSP_DEBUG_PRINT__ /* For debug printouts */
#include "backends/platform/psp/trace.h"
//#define DEBUG_BUFFERS /* to see the contents of the buffers being read */
#ifdef DEBUG_BUFFERS
void printBuffer(byte *ptr, uint32 len) {
uint32 printLen = len <= 10 ? len : 10;
for (int i = 0; i < printLen; i++) {
PSP_INFO_PRINT("%x ", ptr[i]);
}
if (len > 10) {
PSP_INFO_PRINT("... ");
for (int i = len - 10; i < len; i++)
PSP_INFO_PRINT("%x ", ptr[i]);
}
PSP_INFO_PRINT("\n");
}
#endif
// Class PspIoStream ------------------------------------------------
PspIoStream::PspIoStream(const Common::String &path, bool writeMode)
: _handle(0), _path(path), _fileSize(0), _writeMode(writeMode),
_physicalPos(0), _pos(0), _eos(false), _error(false),
_errorSuspend(0), _errorSource(0), _errorPos(0), _errorHandle(0), _suspendCount(0) {
DEBUG_ENTER_FUNC();
//assert(!path.empty()); // do we need this?
}
PspIoStream::~PspIoStream() {
DEBUG_ENTER_FUNC();
if (PowerMan.beginCriticalSection())
PSP_DEBUG_PRINT_FUNC("suspended\n");
PowerMan.unregisterForSuspend(this); // Unregister with powermanager to be suspended
// Must do this before fclose() or resume() will reopen.
sceIoClose(_handle);
PowerMan.endCriticalSection();
}
/* Function to open the file pointed to by the path.
*
*/
void *PspIoStream::open() {
DEBUG_ENTER_FUNC();
if (PowerMan.beginCriticalSection()) {
// No need to open? Just return the _handle resume() already opened
PSP_DEBUG_PRINT_FUNC("suspended\n");
}
_handle = sceIoOpen(_path.c_str(), _writeMode ? PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC : PSP_O_RDONLY, 0777);
if (!_handle) {
_error = true;
_handle = NULL;
}
// Get the file size. This way is much faster than going to the end of the file and back
SceIoStat stat;
sceIoGetstat(_path.c_str(), &stat);
_fileSize = *((uint32 *)(void *)&stat.st_size); // 4GB file (32 bits) is big enough for us
PSP_DEBUG_PRINT("%s filesize[%d]\n", _path.c_str(), _fileSize);
PowerMan.registerForSuspend(this); // Register with the powermanager to be suspended
PowerMan.endCriticalSection();
return (void *)_handle;
}
bool PspIoStream::err() const {
DEBUG_ENTER_FUNC();
if (_error) // We dump since no printing to screen with suspend callback
PSP_ERROR("mem_error[%d], source[%d], suspend error[%d], pos[%d],"
"_errorPos[%d], _errorHandle[%p], suspendCount[%d]\n",
_error, _errorSource, _errorSuspend, _pos,
_errorPos, _errorHandle, _suspendCount);
return _error;
}
void PspIoStream::clearErr() {
_error = false;
}
bool PspIoStream::eos() const {
return _eos;
}
int32 PspIoStream::pos() const {
return _pos;
}
int32 PspIoStream::size() const {
return _fileSize;
}
bool PspIoStream::physicalSeekFromCur(int32 offset) {
int ret = sceIoLseek32(_handle, offset, PSP_SEEK_CUR);
if (ret < 0) {
_error = true;
PSP_ERROR("failed to seek in file[%s] to [%x]. Error[%x]\n", _path.c_str(), offset, ret);
return false;
}
_physicalPos += offset;
return true;
}
bool PspIoStream::seek(int32 offs, int whence) {
DEBUG_ENTER_FUNC();
PSP_DEBUG_PRINT_FUNC("offset[0x%x], whence[%d], _pos[0x%x], _physPos[0x%x]\n", offs, whence, _pos, _physicalPos);
_eos = false;
int32 posToSearchFor = 0;
switch (whence) {
case SEEK_CUR:
posToSearchFor = _pos;
break;
case SEEK_END:
posToSearchFor = _fileSize;
break;
}
posToSearchFor += offs;
// Check for bad values
if (posToSearchFor < 0) {
_error = true;
return false;
} else if (posToSearchFor > _fileSize) {
_error = true;
_eos = true;
return false;
}
_pos = posToSearchFor;
return true;
}
uint32 PspIoStream::read(void *ptr, uint32 len) {
DEBUG_ENTER_FUNC();
PSP_DEBUG_PRINT_FUNC("filename[%s], len[0x%x], ptr[%p], _pos[%x], _physPos[%x]\n", _path.c_str(), len, ptr, _pos, _physicalPos);
if (_error || _eos || len <= 0)
return 0;
uint32 lenRemainingInFile = _fileSize - _pos;
// check for getting EOS
if (len > lenRemainingInFile) {
len = lenRemainingInFile;
_eos = true;
}
if (PowerMan.beginCriticalSection())
PSP_DEBUG_PRINT_FUNC("suspended\n");
// check if we need to seek
if (_pos != _physicalPos)
PSP_DEBUG_PRINT("seeking from %x to %x\n", _physicalPos, _pos);
if (!physicalSeekFromCur(_pos - _physicalPos)) {
_error = true;
return 0;
}
int ret = sceIoRead(_handle, ptr, len);
PowerMan.endCriticalSection();
_physicalPos += ret; // Update position
_pos = _physicalPos;
if (ret != (int)len) { // error
PSP_ERROR("sceIoRead returned [0x%x] instead of len[0x%x]\n", ret, len);
_error = true;
_errorSource = 4;
}
return ret;
}
uint32 PspIoStream::write(const void *ptr, uint32 len) {
DEBUG_ENTER_FUNC();
PSP_DEBUG_PRINT_FUNC("filename[%s], len[0x%x], ptr[%p], _pos[%x], _physPos[%x]\n", _path.c_str(), len, ptr, _pos, _physicalPos);
if (!len || _error) // we actually get some calls with len == 0!
return 0;
_eos = false; // we can't have eos with write
if (PowerMan.beginCriticalSection())
PSP_DEBUG_PRINT_FUNC("suspended\n");
// check if we need to seek
if (_pos != _physicalPos)
if (!physicalSeekFromCur(_pos - _physicalPos)) {
_error = true;
return 0;
}
int ret = sceIoWrite(_handle, ptr, len);
PowerMan.endCriticalSection();
if (ret != (int)len) {
_error = true;
_errorSource = 5;
PSP_ERROR("sceIoWrite returned[0x%x] instead of len[0x%x]\n", ret, len);
}
_physicalPos += ret;
_pos = _physicalPos;
if (_pos > _fileSize)
_fileSize = _pos;
return ret;
}
bool PspIoStream::flush() {
return true;
}
// 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) {
DEBUG_ENTER_FUNC();
PspIoStream *stream = new PspIoStream(path, writeMode);
if (stream->open() <= 0) {
delete stream;
stream = 0;
}
return stream;
}
/*
* Function to suspend the IO stream (called by PowerManager)
* we can have no output here
*/
int PspIoStream::suspend() {
DEBUG_ENTER_FUNC();
_suspendCount++;
if (_handle > 0 && _pos < 0) { /* check for error */
_errorSuspend = SuspendError;
_errorPos = _pos;
_errorHandle = _handle;
}
if (_handle > 0) {
sceIoClose(_handle); // close our file descriptor
_handle = 0xFFFFFFFF; // Set handle to non-null invalid value so makeFromPath doesn't return error
}
return 0;
}
/*
* Function to resume the IO stream (called by Power Manager)
*/
int PspIoStream::resume() {
DEBUG_ENTER_FUNC();
int ret = 0;
_suspendCount--;
// We reopen our file descriptor
_handle = sceIoOpen(_path.c_str(), _writeMode ? PSP_O_RDWR | PSP_O_CREAT : PSP_O_RDONLY, 0777); // open
if (_handle <= 0) {
_errorSuspend = ResumeError;
_errorPos = _pos;
}
// Resume our previous position if needed
if (_handle > 0 && _pos > 0) {
ret = sceIoLseek32(_handle, _pos, PSP_SEEK_SET);
_physicalPos = _pos;
if (ret < 0) { // Check for problem
_errorSuspend = ResumeError;
_errorPos = _pos;
_errorHandle = _handle;
}
}
return ret;
}
#endif /* __PSP__ */
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