Mercurial > cpython-lru_cache-weakref
annotate Python/fmod.c @ 2434:5bc341c4071c legacy-trunk
for MPW __SC__
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Mon, 27 Feb 1995 10:15:10 +0000 |
| parents | d0d0a69b5ca3 |
| children | d6c7e40cbfdf |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
|
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d0d0a69b5ca3
Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents:
1848
diff
changeset
|
2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
|
d0d0a69b5ca3
Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents:
1848
diff
changeset
|
3 The Netherlands. |
| 145 | 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 | |
| 6 | 25 /* Portable fmod(x, y) implementation for systems that don't have it */ |
| 26 | |
| 2434 | 27 #ifdef HAVE_CONFIG_H |
| 28 #include "config.h" | |
| 29 #endif | |
| 30 | |
| 31 #include "mymath.h" | |
| 6 | 32 #include <errno.h> |
| 33 | |
| 34 double | |
| 2434 | 35 fmod(double x, double y) |
| 6 | 36 { |
| 37 double i, f; | |
| 38 | |
| 39 if (y == 0.0) { | |
| 40 errno = EDOM; | |
| 41 return 0.0; | |
| 42 } | |
| 43 | |
| 44 /* return f such that x = i*y + f for some integer i | |
| 45 such that |f| < |y| and f has the same sign as x */ | |
| 46 | |
| 47 i = floor(x/y); | |
| 48 f = x - i*y; | |
| 49 if ((x < 0.0) != (y < 0.0)) | |
| 50 f = f-y; | |
| 51 return f; | |
| 52 } |