Category : C Source Code
Archive   : ECSTR.ZIP
Filename : MEMMOV.C

Output of file : MEMMOV.C contained in archive : ECSTR.ZIP
/* File : memmov.c
Author : Richard A. O'Keefe.
Updated: 25 May 1984
Defines: memmov()

memmov(dst, src, len)
moves len bytes from src to dst. The result is dst+len.
This is to memcpy as str[n]mov is to str[n]cpy, that is, it moves
exactly the same bytes but returns a pointer to just after the
the last changed byte. You can concatenate blocks pa for la,
pb for lb, pc for lc into area pd by doing
memmov(memmov(memmov(pd, pa, la), pb, lb), pc, lc);
Unlike strnmov, memmov does not stop when it hits a NUL byte.

Note: the VAX assembly code version can only handle 0 <= len < 2^16.
It is presented for your interest and amusement.

#include "strings.h"

#if VaxAsm

char *memmov(dst, src, len)
char *dst, *src;
int len;
asm("movc3 12(ap),*8(ap),*4(ap)");
return dst+len;

#else ~VaxAsm

char *memmov(dst, src, len)
register char *dst, *src;
register int len;
while (--len >= 0) *dst++ = *src++;
return dst;

#endif VaxAsm

  3 Responses to “Category : C Source Code
Archive   : ECSTR.ZIP
Filename : MEMMOV.C

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

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