MEP and memcpy
John Antypas
jantypas at hope.UUCP
Tue Oct 14 14:28:37 AEST 1986
Some sites out there do not have BSD 4.3 or Sys V. Those of you who
do will find the compiler will complain about a routine called memcpy.
This is basically a blockmove call. If you have that, use it. If
not, here is memcpy from a string package posted few months back.
/*
* memcpy - copy bytes
*/
char *memcpy(dst, src, size)
char *dst;
char *src;
int size;
{
register char *d;
register char *s;
register int n;
if (size <= 0)
return(dst);
s = src;
d = dst;
if (s <= d && s + (size-1) >= d) {
/* Overlap, must copy right-to-left. */
s += size-1;
d += size-1;
for (n = size; n > 0; n--)
*d-- = *s--;
} else
for (n = size; n > 0; n--)
*d++ = *s++;
return(dst);
}
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