Mercurial > cpython-lru_cache-weakref
annotate Python/memmove.c @ 3323:6098aaa8ae7f legacy-trunk
changes for complex numbers
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Fri, 12 Jan 1996 01:09:56 +0000 |
| parents | d0d0a69b5ca3 |
| children | 65d2d8e67da3 |
| rev | line source |
|---|---|
| 1449 | 1 /*********************************************************** |
|
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d0d0a69b5ca3
Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents:
1746
diff
changeset
|
2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
|
d0d0a69b5ca3
Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents:
1746
diff
changeset
|
3 The Netherlands. |
| 1449 | 4 |
| 5 All Rights Reserved | |
| 6 | |
| 7 Permission to use, copy, modify, and distribute this software and its | |
| 8 documentation for any purpose and without fee is hereby granted, | |
| 9 provided that the above copyright notice appear in all copies and that | |
| 10 both that copyright notice and this permission notice appear in | |
| 11 supporting documentation, and that the names of Stichting Mathematisch | |
| 12 Centrum or CWI not be used in advertising or publicity pertaining to | |
| 13 distribution of the software without specific, written prior permission. | |
| 14 | |
| 15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
| 16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | |
| 18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 ******************************************************************/ | |
| 24 | |
| 25 /* A perhaps slow but I hope correct implementation of memmove */ | |
| 26 | |
| 27 extern char *memcpy(); | |
| 28 | |
| 29 char * | |
| 30 memmove(dst, src, n) | |
| 31 char *dst; | |
| 32 char *src; | |
| 33 int n; | |
| 34 { | |
| 35 char *realdst = dst; | |
| 36 if (n <= 0) | |
| 37 return dst; | |
| 38 if (src >= dst+n || dst >= src+n) | |
| 39 return memcpy(dst, src, n); | |
| 40 if (src > dst) { | |
| 41 while (--n >= 0) | |
| 42 *dst++ = *src++; | |
| 43 } | |
| 44 else if (src < dst) { | |
| 45 src += n; | |
| 46 dst += n; | |
| 47 while (--n >= 0) | |
| 48 *--dst = *--src; | |
| 49 } | |
| 50 return realdst; | |
| 51 } |