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On Sat, Jun 17, 2006 at 02:28:28PM +0100, Ciaran McCreesh wrote: |
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> On Sat, 17 Jun 2006 15:20:52 +0200 Harald van Dijk <truedfx@g.o> |
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> wrote: |
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> | and then accessing {first, null}, or {null, last} as a struct dl_node |
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> | the way to fix the code would be to rewrite the code to use arrays |
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> | of pointers instead of simply three pointer members. There is no |
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> | valid way to do what the code does using pointer members (that's |
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> | simple logic: it relies on the padding between first and null to be |
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> | exactly the same as that between null and last, which is a guarantee |
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> | standard C doesn't make), so fixing it requires quite a bit of work. |
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> |
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> It can be done using nested structs. |
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|
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No, it can't: the two dl_nodes overlap. |
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-- |
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