filespec_carbon.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

			
			// make a ref for the parent directory
			err = FSMakeFSRef(spec.vRefNum, spec.parID, "\p", &parentRef);
			check_noerr(err);
			
			if (err == noErr)
			{
				CHXString strName;
				
				strName.SetFromStr255(spec.name);
				
				err = SetFromParentAndLeaf(parentRef, (const char *) strName, CFStringGetSystemEncoding());
				
			}
		}
	}
	else
	{
		err = paramErr;
	}
	
	UpdateDebugOnlyPath();

	return err;
}
// ------------------------------------------------------------------------------------
OSErr CHXMacInternalSpec::SetFromAlias(AliasHandle alias)
{
	OSErr err;
	
	ClearSpec();

	if (alias) 
	{
		Boolean changed;
		
		err = FSResolveAliasWithMountFlags(NULL, alias,
				&mItemRef, &changed, kResolveAliasFileNoUI);
		if (err == noErr)
		{
			mbRefSet = true;
		}
		else
		{
			// the item may not exist; try to make an FSSpec
			// from the alias and set from that
			FSSpec fsspec;
			
			err = ResolveAliasWithMountFlags(NULL, alias,
				&fsspec, &changed, kResolveAliasFileNoUI);
			if (err == noErr || err == fnfErr)
			{
				SetFromFSSpec(fsspec);
			}
		}
	} 

	UpdateDebugOnlyPath();	// for debugging
	
	return err;
}
// ------------------------------------------------------------------------------------
OSErr CHXMacInternalSpec::SetFromURL(const char *pBuffer)
{
	Boolean bSuccess;
	CHXCFURL cfurl;
	FSRef ref;
	OSErr err;

	// unset our specifier in case we fail
	ClearSpec();

	require_quiet(pBuffer != NULL && *pBuffer != '\0', CantMakeURL);
	require_quiet(0 == ::strnicmp("file:", pBuffer, 5), CantMakeURL);

	// make a CFURL from which we can get an FSRef
	cfurl = pBuffer;
	require(cfurl.IsSet(), CantMakeURL);

	bSuccess = ::CFURLGetFSRef(cfurl, &ref);
	if (bSuccess)
	{
		err = SetFromFSRef(ref);
	}
	else
	{
		// in case item doesn't exist, try using a pathname
		CHXString strPath;

		if (noErr == PathFromURL(pBuffer, strPath))
		{
			err = SetFromPath((const char *) strPath);
		}
	}

CantMakeURL:
		return IsSet() ? HXR_OK : HXR_FAILED;

}
// ------------------------------------------------------------------------------------
void CHXMacInternalSpec::SplitPath(const char *pPath, char separator, CHXString& outParent, CHXString& outLeaf)
{
	CHXString strFull(pPath);
	INT32 offset;
		
	// remove any trailing separator, in case this is a directory
	if (strFull.Right(1) == separator)
	{
		strFull = strFull.Left(strFull.GetLength() - 1);
	}
	
	offset = strFull.ReverseFind(separator);
	if (offset != -1)
	{
		outParent = strFull.Left(offset + 1); // +1 includes the separator
		outLeaf = strFull.Mid(offset + 1);
	}
	else
	{
		outLeaf = strFull;
	}
}
// ------------------------------------------------------------------------------------
CHXMacInternalSpec &CHXMacInternalSpec::operator=(CHXMacInternalSpec& other)
{
	CopyInternalSpec(other);
	return *this;
}
// ------------------------------------------------------------------------------------
BOOL CHXMacInternalSpec::operator==(const CHXMacInternalSpec &other)
{
	OSErr err;
	BOOL bSame = FALSE;
	
	if (mbRefSet && other.mbRefSet)
	{
		err = FSCompareFSRefs(&mItemRef, &other.mItemRef);
		if (err == noErr)
		{
			bSame = TRUE;
		}
	}
	else if (mbParentAndLeafSet && other.mbParentAndLeafSet)
	{
		err = FSCompareFSRefs(&mParentAndLeaf.mItemParentRef, &other.mParentAndLeaf.mItemParentRef);
		if (err == noErr)
		{
			if (mParentAndLeaf.mpLeafName->length == other.mParentAndLeaf.mpLeafName->length)
			{
				if (0 == memcmp(&mParentAndLeaf.mpLeafName->unicode, &other.mParentAndLeaf.mpLeafName->unicode,
					mParentAndLeaf.mpLeafName->length * sizeof(UniChar)))
				{
					bSame = TRUE;
				}
			}
		}
	}
	
	return bSame;
}
// ------------------------------------------------------------------------------------
BOOL CHXMacInternalSpec::operator!=(const CHXMacInternalSpec &other)
{
	return !(*this == other);
}
// ------------------------------------------------------------------------------------
BOOL CHXMacInternalSpec::IsSet() const	// object has been set to a file (which may or may not exist)
{
	return (mbRefSet || mbParentAndLeafSet);
}
// ------------------------------------------------------------------------------------
void CHXMacInternalSpec::Unset()
{
	ClearSpec();
}
// ------------------------------------------------------------------------------------
CHXString CHXMacInternalSpec::GetPersistentString() const
{
	FSRef ref;
	OSErr err;
	CHXString strPersistent;
	
	err = GetFSRef(ref);
	if (err == noErr)
	{
		strPersistent = MakePersistentStringForRef(NULL, ref);
	}
	return strPersistent;
	
}
// ------------------------------------------------------------------------------------
CHXString CHXMacInternalSpec::GetRelativePersistentString(const CHXMacInternalSpec& fromFile) const
{
	CHXString strResult;
	FSRef fromFileRef, targetRef;
	OSErr err;
	
	err = GetFSRef(targetRef);
	require_noerr(err, CantGetTargetRef);
	
	err = fromFile.GetFSRef(fromFileRef);
	require_noerr(err, CantGetFromFileRef);
	
	strResult = MakePersistentStringForRef(&fromFileRef, targetRef);
	
	return strResult;

CantGetFromFileRef:
CantGetTargetRef:
	return "";
	
}
// ------------------------------------------------------------------------------------
CHXString CHXMacInternalSpec::MakePersistentStringForRef(const FSRef *pAnchorRef, const FSRef& targetRef)
{
	HX_RESULT	err;
	CHXString	str;
	char*		pBuff;
	Handle		hHexBuffer;
	Size		sHexBuffSize;
	AliasHandle	hAlias;
	
	// be sure we have a target to specify
	
	err = FSNewAlias(pAnchorRef, &targetRef, &hAlias);
	require_noerr(err, CantMakeAlias);
	
	// fill a temporary buffer with hex of the alias
	hHexBuffer = NewHandle(0);

	err = StuffHexHandle((Handle) hAlias, hHexBuffer);
	require_noerr(err, CantStuff);
	
	// copy our hex buffer to the string
	sHexBuffSize = GetHandleSize(hHexBuffer);

	pBuff = str.GetBuffer(sHexBuffSize + 1); // leave space for terminating null
	BlockMoveData(*hHexBuffer, pBuff, sHexBuffSize);
	pBuff[sHexBuffSize] = 0;	// make it a C-string
	str.ReleaseBuffer();
	
	DisposeHandle(hHexBuffer);
	DisposeHandle((Handle) hAlias);
	
#ifdef _DEBUG
	{
		// during debugging, we'll immediately check that the persistent specifier
		// points to the same place as the actual target

		CHXMacInternalSpec tempAliasTarget;
		
		tempAliasTarget.SetFromPersistentString(str);
		
		if (noErr != FSCompareFSRefs(&targetRef, &tempAliasTarget.mItemRef))
		{
			check(!"Persistent alias doesn't self-resolve");
		}
	}
#endif
	
	return str;

	// error handling

CantStuff:
	DisposeHandle(hHexBuffer);
	DisposeHandle((Handle) hAlias);
CantMakeAlias:
	str = "";
	return str;
}
// ------------------------------------------------------------------------------------
HX_RESULT CHXMacInternalSpec::SetFromPersistentString(const char *pBuffer)
{
	HX_RESULT	err;
	Handle		hHexBuffer;
	Size		sBufferSize;
	AliasHandle	hAlias;
	
	check_nonnull(pBuffer);
	
	sBufferSize = strlen(pBuffer);
	
	// handle empty buffers
	if (sBufferSize == 0)
	{
		ClearSpec();
		return HXR_OK;
	}
	
	//  allocate an empty handle to fill
	hAlias = (AliasHandle) NewHandle(0);
	
	// make a temporary buffer with the hex passed in
	err = PtrToHand(pBuffer, &hHexBuffer, sBufferSize);
	require_noerr(err, CantAllocateHexBuffer);
	
	// turn the hex into our binary alias
	err = UnstuffHexHandle(hHexBuffer, (Handle) hAlias);
	DisposeHandle(hHexBuffer);
	
	if (err == noErr)
	{
		SetFromAlias(hAlias);
	}
	else
	{
		// we couldn't interpret it as hex; try it as a full path
		CHXString 	path(pBuffer);
		
		// resolve 莊old