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deal with older app prefs version

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This commit is contained in:
ehouse 2004-10-09 00:17:29 +00:00
parent 429bd5a4f3
commit 82927d7169
1 changed files with 27 additions and 17 deletions
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40
palm/palmmain.c
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@ -1036,6 +1036,22 @@ uninitHighResGlobals( PalmAppGlobals* globals )
# define uninitHighResGlobals(g) # define uninitHighResGlobals(g)
#endif #endif
static XP_Bool
canConvertPrefs( XWords4PreferenceType* prefs, UInt16 prefSize, XP_S16 vers )
{
XP_Bool success = XP_FALSE;
if ( vers == VERSION_NUM_405 ) {
if ( prefSize < sizeof(XWords4PreferenceType) ) {
XP_U8* newRgn = ((XP_U8*)prefs) + prefSize;
XP_MEMSET( newRgn, 0, sizeof(XWords4PreferenceType) - prefSize );
}
success = XP_TRUE;
}
return success;
} /* canConvertPrefs */
/***************************************************************************** /*****************************************************************************
* *
****************************************************************************/ ****************************************************************************/
@ -1047,6 +1063,7 @@ startApplication( PalmAppGlobals** globalsP )
XWords4PreferenceType prefs; XWords4PreferenceType prefs;
PalmAppGlobals* globals; PalmAppGlobals* globals;
Boolean leftyFlag; Boolean leftyFlag;
Int16 vers;
MPSLOT; MPSLOT;
#if defined FOR_GREMLINS #if defined FOR_GREMLINS
@ -1108,28 +1125,21 @@ startApplication( PalmAppGlobals** globalsP )
} }
prefSize = sizeof( prefs ); prefSize = sizeof( prefs );
prefsFound = PrefGetAppPreferences( AppType, PrefID, &prefs, &prefSize, vers = PrefGetAppPreferences( AppType, PrefID, &prefs, &prefSize, true);
true) == VERSION_NUM; if ( vers == VERSION_NUM ) {
if ( prefsFound ) { prefsFound = XP_TRUE;
} else if ( vers != noPreferenceFound ) {
prefs.versionNum = XP_NTOHS( prefs.versionNum ); prefsFound = canConvertPrefs( &prefs, prefSize, vers );
prefs.curGameIndex = XP_NTOHS( prefs.curGameIndex );
if ( (prefSize == sizeof(prefs))
&& (prefs.versionNum == CUR_PREFS_VERS) ) {
/* all's well */
} else if ( prefs.versionNum < CUR_PREFS_VERS ) {
/* Init the new guys. Later this may get more complex!! */
prefs.cp.showBoardArrow = XP_TRUE;
prefs.cp.showRobotScores = XP_FALSE;
} else { } else {
prefsFound = XP_FALSE; prefsFound = XP_FALSE;
} }
if ( prefsFound ) { if ( prefsFound ) {
prefs.versionNum = XP_NTOHS( prefs.versionNum );
prefs.curGameIndex = XP_NTOHS( prefs.curGameIndex );
MemMove( &globals->gState, &prefs, sizeof(prefs) ); MemMove( &globals->gState, &prefs, sizeof(prefs) );
} }
}
globals->draw = palm_drawctxt_make( MPPARM(globals->mpool) globals->draw = palm_drawctxt_make( MPPARM(globals->mpool)
globals->able, globals->able,