mirror of
https://github.com/AppleWin/AppleWin.git
synced 2024-05-28 17:41:37 +00:00
345 lines
7.8 KiB
C++
345 lines
7.8 KiB
C++
/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 1994-1996, Michael O'Brien
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Copyright (C) 1999-2001, Oliver Schmidt
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Copyright (C) 2002-2005, Tom Charlesworth
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Copyright (C) 2006-2007, Tom Charlesworth, Michael Pohoreski
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AppleWin is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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AppleWin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with AppleWin; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Description: Save-state (snapshot) module
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*
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* Author: Copyright (c) 2004-2006 Tom Charlesworth
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*/
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#include "StdAfx.h"
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#include "AppleWin.h"
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#include "CPU.h"
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#include "Disk.h"
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#include "Frame.h"
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#include "Joystick.h"
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#include "Keyboard.h"
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#include "Memory.h"
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#include "Mockingboard.h"
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#include "SerialComms.h"
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#include "Speaker.h"
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#include "Video.h"
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// Prototypes (Public)
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// Note: This is here and not in Video.h to prevent header include bloat.
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// i.e. so we don't need to incude "Structs.h" for NTSC.cpp
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DWORD VideoGetSnapshot(SS_IO_Video* pSS);
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DWORD VideoSetSnapshot(SS_IO_Video* pSS);
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#define DEFAULT_SNAPSHOT_NAME "SaveState.aws"
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bool g_bSaveStateOnExit = false;
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static std::string g_strSaveStateFilename;
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static std::string g_strSaveStatePathname;
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static std::string g_strSaveStatePath;
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//-----------------------------------------------------------------------------
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void Snapshot_SetFilename(std::string strPathname)
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{
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if (strPathname.empty())
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{
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g_strSaveStateFilename = DEFAULT_SNAPSHOT_NAME;
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g_strSaveStatePathname = g_sCurrentDir;
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if (g_strSaveStatePathname.length() && g_strSaveStatePathname[g_strSaveStatePathname.length()-1] != '\\')
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g_strSaveStatePathname += "\\";
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g_strSaveStatePathname.append(DEFAULT_SNAPSHOT_NAME);
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g_strSaveStatePath = g_sCurrentDir;
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return;
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}
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std::string strFilename = strPathname; // Set default, as maybe there's no path
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g_strSaveStatePath.clear();
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int nIdx = strPathname.find_last_of('\\');
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if (nIdx >= 0 && nIdx+1 < (int)strPathname.length())
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{
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strFilename = &strPathname[nIdx+1];
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g_strSaveStatePath = strPathname.substr(0, nIdx+1); // Bugfix: 1.25.0.2 // Snapshot_LoadState() -> SetCurrentImageDir() -> g_sCurrentDir
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}
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g_strSaveStateFilename = strFilename;
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g_strSaveStatePathname = strPathname;
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}
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const char* Snapshot_GetFilename()
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{
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return g_strSaveStateFilename.c_str();
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}
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const char* Snapshot_GetPath()
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{
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return g_strSaveStatePath.c_str();
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}
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//-----------------------------------------------------------------------------
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void Snapshot_LoadState()
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{
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char szMessage[32 + MAX_PATH];
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std::string strOldImageDir;
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APPLEWIN_SNAPSHOT* pSS = (APPLEWIN_SNAPSHOT*) new char[sizeof(APPLEWIN_SNAPSHOT)];
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try
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{
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strOldImageDir = g_sCurrentDir;
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SetCurrentImageDir(g_strSaveStatePath.c_str()); // Allow .dsk's load without prompting
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if(pSS == NULL)
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throw(0);
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memset(pSS, 0, sizeof(APPLEWIN_SNAPSHOT));
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//
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HANDLE hFile = CreateFile( g_strSaveStatePathname.c_str(),
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GENERIC_READ,
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0,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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if(hFile == INVALID_HANDLE_VALUE)
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{
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strcpy(szMessage, "File not found: ");
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strcpy(szMessage + strlen(szMessage), g_strSaveStatePathname.c_str());
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throw(0);
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}
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DWORD dwBytesRead;
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BOOL bRes = ReadFile( hFile,
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pSS,
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sizeof(APPLEWIN_SNAPSHOT),
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&dwBytesRead,
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NULL);
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CloseHandle(hFile);
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if(!bRes || (dwBytesRead != sizeof(APPLEWIN_SNAPSHOT)))
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{
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// File size wrong: probably because of version mismatch or corrupt file
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strcpy(szMessage, "File size mismatch");
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throw(0);
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}
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if(pSS->Hdr.dwTag != AW_SS_TAG)
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{
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strcpy(szMessage, "File corrupt");
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throw(0);
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}
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if(pSS->Hdr.dwVersion != MAKE_VERSION(1,0,0,1))
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{
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strcpy(szMessage, "Version mismatch");
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throw(0);
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}
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// TO DO: Verify checksum
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//
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// Reset all sub-systems
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MemReset();
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if (!IS_APPLE2)
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MemResetPaging();
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DiskReset();
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KeybReset();
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VideoResetState();
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MB_Reset();
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//
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// Apple2 unit
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//
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CpuSetSnapshot(&pSS->Apple2Unit.CPU6502);
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sg_SSC.CommSetSnapshot(&pSS->Apple2Unit.Comms);
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JoySetSnapshot(&pSS->Apple2Unit.Joystick);
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KeybSetSnapshot(&pSS->Apple2Unit.Keyboard);
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SpkrSetSnapshot(&pSS->Apple2Unit.Speaker);
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VideoSetSnapshot(&pSS->Apple2Unit.Video);
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MemSetSnapshot(&pSS->Apple2Unit.Memory);
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//
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//
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// Slot4: Mockingboard
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MB_SetSnapshot(&pSS->Mockingboard1, 4);
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//
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// Slot5: Mockingboard
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MB_SetSnapshot(&pSS->Mockingboard2, 5);
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//
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// Slot6: Disk][
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DiskSetSnapshot(&pSS->Disk2, 6);
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SetLoadedSaveStateFlag(true);
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}
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catch(int)
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{
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MessageBox( g_hFrameWindow,
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szMessage,
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TEXT("Load State"),
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MB_ICONEXCLAMATION | MB_SETFOREGROUND);
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SetCurrentImageDir(strOldImageDir.c_str());
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}
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delete [] pSS;
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}
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//-----------------------------------------------------------------------------
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void Snapshot_SaveState()
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{
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APPLEWIN_SNAPSHOT* pSS = (APPLEWIN_SNAPSHOT*) new char[sizeof(APPLEWIN_SNAPSHOT)];
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if(pSS == NULL)
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{
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// To do
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return;
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}
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memset(pSS, 0, sizeof(APPLEWIN_SNAPSHOT));
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pSS->Hdr.dwTag = AW_SS_TAG;
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pSS->Hdr.dwVersion = MAKE_VERSION(1,0,0,1);
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pSS->Hdr.dwChecksum = 0; // TO DO
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//
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// Apple2 unit
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//
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pSS->Apple2Unit.UnitHdr.dwLength = sizeof(SS_APPLE2_Unit);
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pSS->Apple2Unit.UnitHdr.dwVersion = MAKE_VERSION(1,0,0,0);
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CpuGetSnapshot(&pSS->Apple2Unit.CPU6502);
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sg_SSC.CommGetSnapshot(&pSS->Apple2Unit.Comms);
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JoyGetSnapshot(&pSS->Apple2Unit.Joystick);
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KeybGetSnapshot(&pSS->Apple2Unit.Keyboard);
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SpkrGetSnapshot(&pSS->Apple2Unit.Speaker);
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VideoGetSnapshot(&pSS->Apple2Unit.Video);
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MemGetSnapshot(&pSS->Apple2Unit.Memory);
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//
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// Slot1: Empty
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pSS->Empty1.Hdr.UnitHdr.dwLength = sizeof(SS_CARD_EMPTY);
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pSS->Empty1.Hdr.UnitHdr.dwVersion = MAKE_VERSION(1,0,0,0);
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pSS->Empty1.Hdr.dwSlot = 1;
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pSS->Empty1.Hdr.dwType = CT_Empty;
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//
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// Slot2: Empty
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pSS->Empty2.Hdr.UnitHdr.dwLength = sizeof(SS_CARD_EMPTY);
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pSS->Empty2.Hdr.UnitHdr.dwVersion = MAKE_VERSION(1,0,0,0);
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pSS->Empty2.Hdr.dwSlot = 2;
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pSS->Empty2.Hdr.dwType = CT_Empty;
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//
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// Slot3: Empty
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pSS->Empty3.Hdr.UnitHdr.dwLength = sizeof(SS_CARD_EMPTY);
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pSS->Empty3.Hdr.UnitHdr.dwVersion = MAKE_VERSION(1,0,0,0);
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pSS->Empty3.Hdr.dwSlot = 3;
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pSS->Empty3.Hdr.dwType = CT_Empty;
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//
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// Slot4: Mockingboard
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MB_GetSnapshot(&pSS->Mockingboard1, 4);
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//
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// Slot5: Mockingboard
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MB_GetSnapshot(&pSS->Mockingboard2, 5);
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//
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// Slot6: Disk][
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DiskGetSnapshot(&pSS->Disk2, 6);
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//
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HANDLE hFile = CreateFile( g_strSaveStatePathname.c_str(),
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GENERIC_WRITE,
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0,
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NULL,
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CREATE_ALWAYS,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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DWORD dwError = GetLastError();
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_ASSERT((dwError == 0) || (dwError == ERROR_ALREADY_EXISTS));
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if(hFile != INVALID_HANDLE_VALUE)
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{
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DWORD dwBytesWritten;
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BOOL bRes = WriteFile( hFile,
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pSS,
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sizeof(APPLEWIN_SNAPSHOT),
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&dwBytesWritten,
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NULL);
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if(!bRes || (dwBytesWritten != sizeof(APPLEWIN_SNAPSHOT)))
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dwError = GetLastError();
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CloseHandle(hFile);
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}
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else
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{
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dwError = GetLastError();
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}
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_ASSERT((dwError == 0) || (dwError == ERROR_ALREADY_EXISTS));
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delete [] pSS;
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}
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//-----------------------------------------------------------------------------
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void Snapshot_Startup()
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{
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static bool bDone = false;
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if(!g_bSaveStateOnExit || bDone)
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return;
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Snapshot_LoadState();
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bDone = true;
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}
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void Snapshot_Shutdown()
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{
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static bool bDone = false;
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if(!g_bSaveStateOnExit || bDone)
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return;
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Snapshot_SaveState();
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bDone = true;
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}
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