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PROPOSAL: small / usefull Stream iface extension [message #27952]

Wed, 11 August 2010 23:39

kohait00 is currently offline

kohait00
Messages: 939
Registered: July 2009
Location: Germany

Experienced Contributor

hi all,

when implementing own, nontrivial protocols using stream, one sometimes (like i am now) in trouble, needing to access the underlying buffer directly, without always triggering a complete copy.. and also beeing able to skip read/write things.
thus here some very small but usefull functions. it would be really cool to have them there. otherwise please comment why not and how could i circumvent this need, without copying over and over.. (imagine having to put packets there that have some data, over which to calculate crc..etc).

Stream.h:85

	byte *    Base()                 { return buffer; }
	byte *    Head()                 { return ptr; }
	void      SkipRead(dword size = 1) { ptr += min((dword)(uintptr_t)(rdlim - ptr), size); }
	void      SkipWrite(dword size = 1){ ptr += min((dword)(uintptr_t)(wrlim - ptr), size); }

Head is the most important for me..
SkipRead makes sense as well (ignoring stuff, without need of dummy-copying just to advance ptr)
SkipWrite is kind of just for symetrical completeness, but might be usefull somewhere..

[Updated on: Wed, 11 August 2010 23:47]

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[Message index]

		PROPOSAL: small / usefull Stream iface extension By: kohait00 on Wed, 11 August 2010 23:39
		Re: PROPOSAL: small / usefull Stream iface extension By: kohait00 on Thu, 12 August 2010 00:14
		Re: PROPOSAL: small / usefull Stream iface extension By: kohait00 on Thu, 12 August 2010 08:36
		Re: PROPOSAL: small / usefull Stream iface extension By: mirek on Fri, 13 August 2010 09:57
		Re: PROPOSAL: small / usefull Stream iface extension By: kohait00 on Fri, 13 August 2010 10:07
		Re: PROPOSAL: small / usefull Stream iface extension By: kohait00 on Fri, 13 August 2010 10:23
		Re: PROPOSAL: small / usefull Stream iface extension By: mirek on Fri, 13 August 2010 10:30
		Re: PROPOSAL: small / usefull Stream iface extension By: mirek on Fri, 13 August 2010 10:46
		Re: PROPOSAL: small / usefull Stream iface extension By: kohait00 on Fri, 13 August 2010 10:47
		Re: PROPOSAL: small / usefull Stream iface extension By: kohait00 on Fri, 13 August 2010 10:50
		Re: PROPOSAL: small / usefull Stream iface extension By: mirek on Fri, 13 August 2010 10:29

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