Category : C Source Code
Archive   : E_C_STR.ZIP
Filename : BMOVE.C

/* File : bmove.c
Author : Richard A. O'Keefe.
Updated: 23 April 1984
Defines: bmove()

bmove(dst, src, len) moves exactly "len" bytes from the source "src"
to the destination "dst". It does not check for NUL characters as
strncpy() and strnmov() do. Thus if your C compiler doesn't support
structure assignment, you can simulate it with
bmove(&to, &from, sizeof from);
The standard 4.2bsd routine for this purpose is bcopy. But as bcopy
has its first two arguments the other way around you may find this a
bit easier to get right.
No value is returned.

Note: the "b" routines are there to exploit certain VAX order codes,
but the MOVC3 instruction will only move 65535 characters. The asm
code is presented for your interest and amusement.
*/

#include "strings.h"

#if VaxAsm

void bmove(dst, src, len)
char *dst, *src;
int len;
{
asm("movc3 12(ap),*8(ap),*4(ap)");
}

#else ~VaxAsm

void bmove(dst, src, len)
register char *dst, *src;
register int len;
{
while (--len >= 0) *dst++ = *src++;
}

#endif VaxAsm