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From: andyb@coat.uucp (Andy Behrens)
Newsgroups: comp.sources.wanted,comp.unix.questions
Subject: Re: Memcpy definition wanted
Message-ID: <12066@dartvax.Dartmouth.EDU>
Date: 2 Feb 89 23:44:43 GMT
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In article <801@psc90.UUCP> netnews@psc90.UUCP writes:
>  I am looking for the definition for memcpy. For example, strchr in
>  BSD is rindex, and strrchr is rrindex. What is the term that BSD uses?

This table shows the correspondences between the SYS V and the Berkeley
byte-string operations.  Note the parameters to bcopy: they're
backwards from what you'd expect!

		SYS V				BSD
	---------------------------	-------------------------
	memcpy(dst,src,length)		bcopy(src,dst,length)

	memset(dst,0,length)		bzero(dst,length)		

	memcmp(str1,str2,length)==0	bcmp(str1,str2,length)==0	

There are a few small differences between the two sets of functions.

- The BSD routines want "length" to be an unsigned int.  
- Memcpy and memset return a pointer to dst, while bcopy and bzero do
	not return a value.  
- Memcmp can be used for "greater than" and "less than" comparisons, 
	while bcmp only tells you if two strings are identical, without 
	telling which is greater.  
- Memset can be used to set bytes to a value other than zero.

See the memory(3C) or bstring(3) man pages for all the details.

--
Live justly, love gently, walk humbly.
					Andy Behrens
					andyb@coat.uucp

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