From be0e9420a1673b7b3991d7eec843d75219a84f34 Mon Sep 17 00:00:00 2001 From: Guido van Rossum Date: Fri, 24 Dec 1993 10:32:00 +0000 Subject: New files. --- Python/memmove.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Python/memmove.c (limited to 'Python/memmove.c') diff --git a/Python/memmove.c b/Python/memmove.c new file mode 100644 index 0000000000..e812751127 --- /dev/null +++ b/Python/memmove.c @@ -0,0 +1,51 @@ +/*********************************************************** +Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum, +Amsterdam, The Netherlands. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the names of Stichting Mathematisch +Centrum or CWI not be used in advertising or publicity pertaining to +distribution of the software without specific, written prior permission. + +STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO +THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND +FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE +FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT +OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + +******************************************************************/ + +/* A perhaps slow but I hope correct implementation of memmove */ + +extern char *memcpy(); + +char * +memmove(dst, src, n) + 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; +} -- cgit v1.2.1