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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] [PATCH 1/8] qapi: fix NULL pointer dereference |
Date: | Fri, 16 Dec 2011 09:54:38 -0600 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.21) Gecko/20110831 Lightning/1.0b2 Thunderbird/3.1.13 |
On 12/16/2011 09:42 AM, Paolo Bonzini wrote:
On 12/16/2011 04:23 PM, Anthony Liguori wrote:Ok. I think nullable strings are not a good idea simply because it means that a property can have a state that cannot be set.How is this different from NULL links? (Honest, not trick question :)).
An empty string == NULL for links. If a pointer is NULL, an empty string is returned. So get/set is full symmetric.
Long term, I want to be able to do something like dump the current device graph to a config file, and then use that config file to recreate the same machine again. A nullable property without a null representation would not allow this.JSON null is such a representation.
For JSON, but it doesn't map to a config file easily nor does it map to command line syntax well.
Regards, Anthony Liguori
Paolo
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