fieker-DuValspielwiese
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Last change
on this file since 997e23 was
9c115e1,
checked in by Hans Schoenemann <hannes@…>, 14 years ago
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pow -> ipower, code cleanup
git-svn-id: file:///usr/local/Singular/svn/trunk@12772 2c84dea3-7e68-4137-9b89-c4e89433aadc
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-
Property mode set to
100644
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File size:
568 bytes
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| 1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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| 2 | /* $Id$ */ |
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| 3 | |
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| 4 | //{{{ docu |
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| 5 | // |
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| 6 | // cf_util.cc - miscellaneous functions, not necessarily related |
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| 7 | // to canonical forms. |
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| 8 | // |
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| 9 | // Used by: fac_cantzass.cc, gfops.cc |
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| 10 | // |
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| 11 | //}}} |
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| 12 | |
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| 13 | #include <config.h> |
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| 14 | |
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| 15 | //{{{ int ipower ( int b, int m ) |
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| 16 | //{{{ docu |
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| 17 | // |
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| 18 | // ipower() - calculate b^m in standard integer arithmetic. |
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| 19 | // |
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| 20 | // Note: Beware of overflows. |
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| 21 | // |
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| 22 | //}}} |
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| 23 | int |
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| 24 | ipower ( int b, int m ) |
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| 25 | { |
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| 26 | int prod = 1; |
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| 27 | |
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| 28 | while ( m != 0 ) |
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| 29 | { |
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| 30 | if ( m % 2 != 0 ) |
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| 31 | prod *= b; |
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| 32 | m /= 2; |
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| 33 | if ( m != 0 ) |
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| 34 | b *= b; |
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| 35 | } |
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| 36 | return prod; |
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| 37 | } |
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| 38 | //}}} |
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