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36 lines
711 B
C
36 lines
711 B
C
/* bcopy -- copy memory regions of arbitary length
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NAME
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bcopy -- copy memory regions of arbitrary length
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SYNOPSIS
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void bcopy (char *in, char *out, int length)
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DESCRIPTION
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Copy LENGTH bytes from memory region pointed to by IN to memory
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region pointed to by OUT.
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BUGS
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Significant speed improvements can be made in some cases by
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implementing copies of multiple bytes simultaneously, or unrolling
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the copy loop.
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*/
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void
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bcopy (src, dest, len)
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register char *src, *dest;
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int len;
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{
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if (dest < src)
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while (len--)
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*dest++ = *src++;
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else
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{
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char *lasts = src + (len-1);
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char *lastd = dest + (len-1);
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while (len--)
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*(char *)lastd-- = *(char *)lasts--;
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}
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}
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