mirror of https://github.com/stella-emu/stella.git
Added state saving and loading using the F9, F10, and F11 keys. The
game state is stored in a 'state' sub-directory of the current working directory or in a 'state' sub-directory of the directory specified by the 'STELLA_HOME' environment variable if it is set. git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@163 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
bwmott
parent
7ca813cc1b
commit
8d530f38a2
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@ -8,18 +8,19 @@
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2002 by Bradford W. Mott
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// Copyright (c) 1995-2003 by Bradford W. Mott
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//
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// See the file "license" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//
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// $Id: mainDOS.cxx,v 1.8 2002-11-13 03:47:55 bwmott Exp $
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// $Id: mainDOS.cxx,v 1.9 2003-01-08 05:19:07 bwmott Exp $
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//============================================================================
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#include <go32.h>
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#include <dpmi.h>
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#include <sys/farptr.h>
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#include <sys/nearptr.h>
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#include <sys/stat.h>
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#include <dos.h>
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#include <pc.h>
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#include <unistd.h>
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@ -88,6 +89,8 @@ bool theUseModeXFlag = false;
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// Pointer to the joysticks object
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PCJoysticks* theJoysticks;
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#define MESSAGE_INTERVAL 2
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// Mouse IRQ
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#define MOUSE_BIOS 0x33
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@ -110,6 +113,122 @@ _go32_dpmi_seginfo theOldKeyboardHandler;
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_go32_dpmi_seginfo theKeyboardHandler;
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static void keyboardInterruptServiceRoutine(void);
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// Indicates the current state to use for state saving
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static uInt32 theCurrentState = 0;
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// The locations for various required files
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static string theHomeDir;
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static string theStateDir;
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/**
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Changes the current state slot.
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*/
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void changeState(uInt32 change)
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{
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// Calculate new state slot
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theCurrentState = (theCurrentState + ((change == 0) ? 9 : 1)) % 10;
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// Print appropriate message
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ostringstream buf;
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buf << "Changed to slot " << theCurrentState;
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string message = buf.str();
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theConsole->mediaSource().showMessage(message,
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MESSAGE_INTERVAL * theDesiredFrameRate);
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}
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/**
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Saves state of the current game in the current slot.
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*/
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void saveState()
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{
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ostringstream buf;
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string md5 = theConsole->properties().get("Cartridge.MD5");
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string sub1 = theStateDir + '\\' + md5.substr(0, 8);
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string sub2 = sub1 + '\\' + md5.substr(8, 8);
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string sub3 = sub2 + '\\' + md5.substr(16, 8);
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buf << sub3 << '\\' << md5.substr(24, 8) << ".st" << theCurrentState;
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string filename = buf.str();
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// If needed create the sub-directory corresponding to the characters
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// of the MD5 checksum
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if(access(sub1.c_str(), F_OK) != 0)
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{
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if(mkdir(sub1.c_str(), S_IWUSR) != 0)
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{
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theConsole->mediaSource().showMessage(string() = "Error Saving State",
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MESSAGE_INTERVAL * theDesiredFrameRate);
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return;
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}
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}
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if(access(sub2.c_str(), F_OK) != 0)
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{
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if(mkdir(sub2.c_str(), S_IWUSR) != 0)
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{
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theConsole->mediaSource().showMessage(string() = "Error Saving State",
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MESSAGE_INTERVAL * theDesiredFrameRate);
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return;
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}
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}
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if(access(sub3.c_str(), F_OK) != 0)
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{
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if(mkdir(sub3.c_str(), S_IWUSR) != 0)
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{
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theConsole->mediaSource().showMessage(string() = "Error Saving State",
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MESSAGE_INTERVAL * theDesiredFrameRate);
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return;
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}
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}
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// Do a state save using the System
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int result = theConsole->system().saveState(filename, md5);
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// Print appropriate message
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buf.str("");
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if(result == 1)
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buf << "State " << theCurrentState << " saved";
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else if(result == 2)
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buf << "Error saving state " << theCurrentState;
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else if(result == 3)
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buf << "Invalid state " << theCurrentState << " file";
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string message = buf.str();
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theConsole->mediaSource().showMessage(message, MESSAGE_INTERVAL *
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theDesiredFrameRate);
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}
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/**
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Loads state from the current slot for the current game.
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*/
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void loadState()
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{
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ostringstream buf;
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string md5 = theConsole->properties().get("Cartridge.MD5");
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string sub1 = theStateDir + '\\' + md5.substr(0, 8);
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string sub2 = sub1 + '\\' + md5.substr(8, 8);
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string sub3 = sub2 + '\\' + md5.substr(16, 8);
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buf << sub3 << '\\' << md5.substr(24, 8) << ".st" << theCurrentState;
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string filename = buf.str();
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// Do a state load using the System
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int result = theConsole->system().loadState(filename, md5);
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// Print appropriate message
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buf.str("");
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if(result == 1)
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buf << "State " << theCurrentState << " loaded";
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else if(result == 2)
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buf << "Error loading state " << theCurrentState;
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else if(result == 3)
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buf << "Invalid state " << theCurrentState << " file";
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string message = buf.str();
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theConsole->mediaSource().showMessage(message, MESSAGE_INTERVAL *
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theDesiredFrameRate);
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}
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/**
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This routine should be called once the console is create to setup
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@ -510,6 +629,47 @@ void updateEventsUsingKeyboardState()
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theQuitIndicator = true;
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}
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// Handle switching save state slots
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static bool changedState = false;
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if((theKeyboardKeyState[SCAN_F10]) && !changedState)
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{
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if(theKeyboardKeyState[SCAN_LSHIFT] || theKeyboardKeyState[SCAN_RSHIFT])
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{
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changeState(0);
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}
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else
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{
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changeState(1);
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}
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changedState = true;
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}
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else if(!theKeyboardKeyState[SCAN_F10])
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{
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changedState = false;
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}
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static bool savedState = false;
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if(!savedState && theKeyboardKeyState[SCAN_F9])
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{
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saveState();
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savedState = true;
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}
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else if(!theKeyboardKeyState[SCAN_F9])
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{
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savedState = false;
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}
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static bool loadedState = false;
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if(!loadedState && theKeyboardKeyState[SCAN_F11])
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{
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loadState();
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loadedState = true;
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}
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else if(!theKeyboardKeyState[SCAN_F11])
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{
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loadedState = false;
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}
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// First we clear all of the keyboard events
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for(unsigned int k = 0; k < sizeof(list) / sizeof(Switches); ++k)
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{
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@ -697,6 +857,53 @@ static void keyboardInterruptServiceRoutine(void)
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outp(0x20, 0x20);
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}
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/**
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Ensure that the necessary directories are created for Stella under
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STELLA_HOME or the current working directory if STELLA_HOME is not
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defined.
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Required directories are $STELLA_HOME/state.
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This must be called before any other function.
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*/
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bool setupDirs()
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{
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// Get the directory to use
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theHomeDir = getenv("STELLA_HOME");
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if(theHomeDir == "")
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{
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theHomeDir = ".";
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}
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// Remove trailing backslash
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if((theHomeDir.length() >= 1) &&
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(theHomeDir[theHomeDir.length() - 1] == '\\'))
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{
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theHomeDir = theHomeDir.substr(0, theHomeDir.length() - 1);
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}
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// Create state saving directory if needed
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theStateDir = theHomeDir + "\\state";
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if(access(theStateDir.c_str(), F_OK) != 0)
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{
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if(mkdir(theStateDir.c_str(), S_IWUSR) != 0)
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{
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cerr << "ERROR: Creating state save directory "
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<< theStateDir << endl;
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return false;
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}
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}
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if(access(theStateDir.c_str(), R_OK | W_OK | X_OK | D_OK) != 0)
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{
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cerr << "ERROR: Access not allowed to the state save directory "
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<< theStateDir << endl;
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return false;
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}
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return true;
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}
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/**
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Display a usage message and exit the program
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*/
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@ -704,7 +911,7 @@ void usage()
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{
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static const char* message[] = {
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"",
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"Stella for DOS version 1.2.1",
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"Stella for DOS version 1.3",
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"",
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"Usage: stella [option ...] file",
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"",
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@ -818,6 +1025,12 @@ void handleCommandLineArguments(int argc, char* argv[])
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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int main(int argc, char* argv[])
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{
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// First set up the directories where Stella will find RC and state files
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if(!setupDirs())
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{
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return 0;
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}
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// Handle the command line arguments
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handleCommandLineArguments(argc, argv);
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