1 /* ScummVM - Graphic Adventure Engine 2 * 3 * ScummVM is the legal property of its developers, whose names 4 * are too numerous to list here. Please refer to the COPYRIGHT 5 * file distributed with this source distribution. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 2 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 20 * 21 */ 22 23 #ifndef PSPSTREAM_H_ 24 #define PSPSTREAM_H_ 25 26 #include <pspkerneltypes.h> 27 #include "backends/platform/psp/powerman.h" 28 //#include "common/list.h" 29 #include "common/noncopyable.h" 30 #include "common/stream.h" 31 #include "common/str.h" 32 33 /** 34 * Class to handle special suspend/resume needs of PSP IO Streams 35 */ 36 class PspIoStream final : public Common::SeekableReadStream, public Common::SeekableWriteStream, public Common::NonCopyable, public Suspendable { 37 protected: 38 SceUID _handle; // file handle 39 Common::String _path; 40 int _fileSize; 41 bool _writeMode; // for resuming in the right mode 42 int _physicalPos; // physical position in file 43 int _pos; // position. Sometimes virtual 44 bool _eos; // EOS flag 45 46 enum { 47 SuspendError = 2, 48 ResumeError = 3 49 }; 50 51 // debug stuff 52 mutable int _error; // file error state 53 int _errorSuspend; // for debugging 54 mutable int _errorSource; 55 int _errorPos; 56 SceUID _errorHandle; 57 int _suspendCount; 58 59 bool physicalSeekFromCur(int32 offset); 60 61 public: 62 63 /** 64 * Given a path, invoke fopen on that path and wrap the result in a 65 * PspIoStream instance. 66 */ 67 static PspIoStream *makeFromPath(const Common::String &path, bool writeMode); 68 69 PspIoStream(const Common::String &path, bool writeMode); 70 virtual ~PspIoStream() override; 71 72 SceUID open(); // open the file pointed to by the file path 73 74 bool err() const override; 75 void clearErr() override; 76 bool eos() const override; 77 78 virtual uint32 write(const void *dataPtr, uint32 dataSize) override; 79 virtual bool flush() override; 80 81 virtual int64 pos() const override; 82 virtual int64 size() const override; 83 virtual bool seek(int64 offs, int whence = SEEK_SET) override; 84 virtual uint32 read(void *dataPtr, uint32 dataSize) override; 85 86 // for suspending 87 int suspend() override; /* Suspendable interface (power manager) */ 88 int resume() override; /* " " */ 89 }; 90 91 #endif /* PSPSTREAM_H_ */ 92