Message 139856 - Python tracker

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In-reply-to
Author	skrah
Recipients	jcon, kermode, mark.dickinson, ncoghlan, petri.lehtinen, pitrou, pv, rupole, skrah, teoliphant, vstinner
Date	2011年07月05日.11:44:53
SpamBayes Score	0.0011326738
Marked as misclassified	No
Message-id	<1309866294.14.0.527481806817.issue10181@psf.upfronthosting.co.za>

Content
I'm slightly confused about the implication chain in the flags. PyBUF_STRIDES seem to allow for discontiguous arrays, yet STRIDES -> ND -> C_CONTIGUOUS. PyBUF_FULL[_RO] \| PyBUF_INDIRECT -------------- PyBUF_FORMAT ----------[PyBUF_WRITABLE] \| PyBUF_STRIDES (This would be used when the consumer can handle strided, discontiguous arrays ...) \| PyBUF_ND <-> PyBUF_CONTIG (why?) \| PyBUF_C_CONTIGUOUS (... but the implication chain leads us to a contiguous buffer)

Content

I'm slightly confused about the implication chain in the flags. PyBUF_STRIDES 
seem to allow for discontiguous arrays, yet STRIDES -> ND -> C_CONTIGUOUS.
 PyBUF_FULL[_RO]
 |
 PyBUF_INDIRECT -------------- PyBUF_FORMAT ----------[PyBUF_WRITABLE] 
 |
 PyBUF_STRIDES (This would be used when the consumer can handle strided, discontiguous arrays ...)
 |
 PyBUF_ND <-> PyBUF_CONTIG (why?) 
 |
 PyBUF_C_CONTIGUOUS (... but the implication chain leads us to a contiguous buffer)

History
Date	User	Action	Args
2011年07月05日 11:44:54	skrah	set	recipients: + skrah, teoliphant, mark.dickinson, ncoghlan, rupole, kermode, pitrou, vstinner, pv, jcon, petri.lehtinen
2011年07月05日 11:44:54	skrah	set	messageid: <1309866294.14.0.527481806817.issue10181@psf.upfronthosting.co.za>
2011年07月05日 11:44:53	skrah	link	issue10181 messages
2011年07月05日 11:44:53	skrah	create

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