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v0.8.1
Revision 0871e9315ec2395775f600baedacdcbcd4cb5f5c authored by Guido van Rossum on 22 January 2001, 19:28:09 UTC, committed by Guido van Rossum on 22 January 2001, 19:28:09 UTC 
New special case in comparisons: None is smaller than any other object
 
(unless the object's type overrides this comparison).
1 parent 0f564ea
Raw File
memmove.c 

/* A perhaps slow but I hope correct implementation of memmove */

extern char *memcpy(char *, char *, int);

char *
memmove(char *dst, char *src, int n)
{
	char *realdst = dst;
	if (n <= 0)
		return dst;
	if (src >= dst+n || dst >= src+n)
		return memcpy(dst, src, n);
	if (src > dst) {
		while (--n >= 0)
			*dst++ = *src++;
	}
	else if (src < dst) {
		src += n;
		dst += n;
		while (--n >= 0)
			*--dst = *--src;
	}
	return realdst;
}
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