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Re: Saving CFArray/CFDict/CFData to disk
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Re: Saving CFArray/CFDict/CFData to disk

Serialization of MenuRef and IconRef data could be done by way of using
CopyMenuItemData and IconRefToIconFamily, respectively, to get the data in a
more accessible manner. 

Quoting John Stiles <email@hidden>:


On May 24, 2007, at 10:31 AM, Laurence Harris wrote:


On May 24, 2007, at 8:19 AM, Bernie wrote:

Robert P wrote:

Further, you will then find that what is written to the file is not the string "MyData" but an obfuscated representation of a raw CFStringRef value, for example:
<array>
<data>
GCAAAA==
</data>
</array>

This seems, er, an unusual way to manipulate a CFStringRef, which at best can remain valid only during the lifetime of the app. 

Ouch!

Looks like I need a rethink on my struct (or the way I read/write to disk). Plus, I may encounter similar problems with iconRef and menuRef:

Indeed. What exactly are you trying to accomplish with this? CFStringRefs, IconRef, and MenuRefs are all pointers to opaque data, as you must surely know, and hence only valid during the life of the process in which they are created. Why would you store them in a file?

Obviously something like a CFStringRef is serializable though. You
could output a serialized form of the data. (Not sure how you could do this with an IconRef or MenuRef though,
since non-Core Foundation objects probably don't incorporate the
concept of being serialized into a dictionary.)


Larry


//---------------
typedef struct DBData {
	union {
		struct {
			CFStringRef		string;
			IconRef			iconRef;
			RGBColor		rgb;
		} v1;

		struct {
			SInt32   val;
			SInt32   min;
			SInt32   max;
			MenuRef  menuRef;
		} v2;

		struct {
			CFAbsoluteTime  date;
		} v3;

		struct {
			ThemeButtonValue  btnVal;
		} v4;
	} u;
} DBData;

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References: 


 >re: Saving CFArray/CFDict/CFData to disk (From: George Warner <email@hidden>)


 >Re: Saving CFArray/CFDict/CFData to disk (From: Bernie <email@hidden>)


 >Re: Saving CFArray/CFDict/CFData to disk (From: Frederick Cheung <email@hidden>)


 >Re: Saving CFArray/CFDict/CFData to disk (From: Bernie <email@hidden>)


 >Re: Saving CFArray/CFDict/CFData to disk (From: Laurence Harris <email@hidden>)


 >Re: Saving CFArray/CFDict/CFData to disk (From: John Stiles <email@hidden>)























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