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27 lines
459 B
27 lines
459 B
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/* Portable fmod(x, y) implementation for systems that don't have it */ |
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#include "pyconfig.h" |
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#include "pyport.h" |
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#include <errno.h> |
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double |
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fmod(double x, double y) |
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{ |
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double i, f; |
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if (y == 0.0) { |
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errno = EDOM; |
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return 0.0; |
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} |
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/* return f such that x = i*y + f for some integer i |
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such that |f| < |y| and f has the same sign as x */ |
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i = floor(x/y); |
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f = x - i*y; |
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if ((x < 0.0) != (y < 0.0)) |
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f = f-y; |
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return f; |
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}
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