Mercurial > cpython-lru_cache-weakref

annotate Python/hypot.c @ 31606:fd2103ae6f29 legacy-trunk

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Add pystack definition to Misc/gdbinit with some explanation of its behavior and add flag comments to ceval.c and main.c alerting people to the coupling between pystack and the layout of those files.
author Skip Montanaro <skip@pobox.com>
date Mon, 01 Mar 2004 15:44:05 +0000
parents 2dea40e40d9d
children 7bc4cc972b0b
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Guido van Rossum <guido@python.org>
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1 /* hypot() replacement */
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2
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2dea40e40d9d Patch #411138: Rename config.h to pyconfig.h. Closes bug #231774.
Martin v. Löwis <martin@v.loewis.de>
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3 #include "pyconfig.h"
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59f8cedcf049 merge Include/my*.h into Include/pyport.h
Peter Schneider-Kamp <nowonder@nowonder.de>
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4 #include "pyport.h"
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f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
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6 double hypot(double x, double y)
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7 {
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8 double yx;
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9
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10 x = fabs(x);
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11 y = fabs(y);
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12 if (x < y) {
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13 double temp = x;
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14 x = y;
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15 y = temp;
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16 }
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17 if (x == 0.)
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18 return 0.;
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19 else {
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20 yx = y/x;
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21 return x*sqrt(1.+yx*yx);
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22 }
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23 }