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https://github.com/python/cpython
Revision a3788642a3dd46d8efa1a424781c2dcb643b2952 authored by Fred Drake on 23 July 2003, 15:18:03 UTC, committed by Fred Drake on 23 July 2003, 15:18:03 UTC
Closes SF bug #776181.  Should be backported.
1 parent 18452a4
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Tip revision: a3788642a3dd46d8efa1a424781c2dcb643b2952 authored by Fred Drake on 23 July 2003, 15:18:03 UTC
Fix representation of ^= operator in __ixor__() documentation.
Tip revision: a378864
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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