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function to open NDA resource fork.

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Kelvin Sherlock 2018-11-21 23:54:09 -05:00
parent b92d2b00e7
commit 1a83ad9794
1 changed files with 77 additions and 0 deletions
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77
tools.c
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@ -33,6 +33,9 @@ Integer Math.
#include <locator.h>
#include <memory.h>
#include <intmath.h>
#include <resources.h>
#include <gsos.h>
#include <loader.h>
extern pascal Word GetMasterSCB(void) inline(0x1704,dispatcher);
@ -117,6 +120,7 @@ unsigned NDAStartUpTools(Word memID, StartStopRecord *ssRef) {
unsigned dp = 0;
unsigned char *dptr = 0;
unsigned errors = 0;
unsigned level = 0;
ssRef->resFileID = 0;
@ -326,3 +330,76 @@ void NDAShutDownTools(StartStopRecord *ssRef){
DisposeHandle(ssRef->dPageHandle);
}
typedef struct NDAResourceCookie {
Word oldPrefs;
Word oldRApp;
Word resFileID;
} NDAResourceCookie;
/*
* Open the resource fork.
*
*/
Word NDAResourceStartUp(Word memID, Word access, NDAResourceCookie *cookie) {
Pointer myPath;
LevelRecGS levelDCB;
SysPrefsRecGS prefsDCB;
Word resFileID;
Word oldLevel;
cookie->oldPrefs = 0;
cookie->resFileID = 0;
cookie->oldRApp = GetCurResourceApp();
levelDCB.pCount = 2;
GetLevelGS(&levelDCB);
oldLevel = levelDCB.level;
levelDCB.level = 0;
SetLevelGS(&levelDCB);
levelDCB.level = oldLevel;
prefsDCB.pCount = 1;
GetSysPrefsGS(&prefsDCB);
cookie->oldPrefs = prefsDCB.preferences;
prefsDCB.preferences = (prefsDCB.preferences & 0x1fff) | 0x8000;
SetSysPrefsGS(&prefsDCB);
ResourceStartUp(memID);
myPath = LGetPathname2(memID, 1);
resFileID = OpenResourceFile(access, NULL, myPath);
if (_toolErr) {
ResourceShutDown();
resFileID = 0;
}
cookie->resFileID = resFileID;
SetLevelGS(&levelDCB);
return resFileID;
}
/*
* restore previous resource app and system preferences.
*/
void NDAResourceRestore(NDAResourceCookie *cookie) {
SysPrefsRecGS prefsDCB;
prefsDCB.pCount = 1;
prefsDCB.preferences = cookie->oldPrefs;
SetSysPrefsGS(&prefsDCB);
SetCurResourceApp(cookie->oldRApp);
}
/*
* close the resource fork.
*/
void NDAResourceShutDown(NDAResourceCookie *cookie) {
CloseResourceFile(cookie->resFileID);
ResourceShutDown();
}