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128 lines
4 KiB
C
128 lines
4 KiB
C
/*
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** FindApplicationFromCreator uses the Desktop Database to
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** locate the creator application for the given document
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**
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** this routine will check the desktop database of all local
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** disks, then the desktop databases of all server volumes
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** (so up to two passes will be made)
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**
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** This code was created from FindApplicationFromDocument
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** routine, origin unknown.
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*/
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#include <Types.h>
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#include <Files.h>
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#include <Errors.h>
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#include "getapplbycreator.h"
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OSErr FindApplicationFromCreator(OSType creator,
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FSSpecPtr applicationFSSpecPtr)
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{
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enum { localPass, remotePass, donePass } volumePass;
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DTPBRec desktopParams;
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HParamBlockRec hfsParams;
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short volumeIndex;
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Boolean foundFlag;
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GetVolParmsInfoBuffer volumeInfoBuffer;
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OSErr retCode;
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/* dkj 12/94 initialize flag to false (thanks to Peter Baral for pointing out this bug) */
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foundFlag = false;
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volumePass = localPass;
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volumeIndex = 0;
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do {
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/*
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** first, find the vRefNum of the volume whose Desktop Database
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** we're checking this time
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*/
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volumeIndex++;
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/* convert the volumeIndex into a vRefNum */
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hfsParams.volumeParam.ioNamePtr = nil;
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hfsParams.volumeParam.ioVRefNum = 0;
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hfsParams.volumeParam.ioVolIndex = volumeIndex;
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retCode = PBHGetVInfoSync(&hfsParams);
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/* a nsvErr indicates that the current pass is over */
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if (retCode == nsvErr) goto SkipThisVolume;
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if (retCode != noErr) goto Bail;
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/*
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** call GetVolParms to determine if this volume is a server
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** (a remote volume)
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*/
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hfsParams.ioParam.ioBuffer = (Ptr) &volumeInfoBuffer;
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hfsParams.ioParam.ioReqCount = sizeof(GetVolParmsInfoBuffer);
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retCode = PBHGetVolParmsSync(&hfsParams);
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if (retCode != noErr) goto Bail;
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/*
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** if the vMServerAdr field of the volume information buffer
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** is zero, this is a local volume; skip this volume
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** if it's local on a remote pass or remote on a local pass
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*/
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if ((volumeInfoBuffer.vMServerAdr != 0) !=
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(volumePass == remotePass)) goto SkipThisVolume;
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/* okay, now we've found the vRefNum for our desktop database call */
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desktopParams.ioVRefNum = hfsParams.volumeParam.ioVRefNum;
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/*
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** find the path refNum for the desktop database for
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** the volume we're interested in
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*/
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desktopParams.ioNamePtr = nil;
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retCode = PBDTGetPath(&desktopParams);
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if (retCode == noErr && desktopParams.ioDTRefNum != 0) {
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/*
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** use the GetAPPL call to find the preferred application
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** for opening any document with this one's creator
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*/
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desktopParams.ioIndex = 0;
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desktopParams.ioFileCreator = creator;
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desktopParams.ioNamePtr = applicationFSSpecPtr->name;
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retCode = PBDTGetAPPLSync(&desktopParams);
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if (retCode == noErr) {
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/*
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** okay, found it; fill in the application file spec
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** and set the flag indicating we're done
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*/
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applicationFSSpecPtr->parID = desktopParams.ioAPPLParID;
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applicationFSSpecPtr->vRefNum = desktopParams.ioVRefNum;
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foundFlag = true;
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}
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}
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SkipThisVolume:
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/*
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** if retCode indicates a no such volume error or if this
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** was the first pass, it's time to move on to the next pass
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*/
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if (retCode == nsvErr) {
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volumePass++;
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volumeIndex = 0;
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}
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} while (foundFlag == false && volumePass != donePass);
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Bail:
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if (retCode == nsvErr)
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return fnfErr; /* More logical than "No such volume" */
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return retCode;
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}
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