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49 lines
877 B
49 lines
877 B
/**********
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Copyright 1999 Emmanuel Rouat
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**********/
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/* Decl. for missing maths functions, if any */
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#ifndef ngspice_MISSING_MATH_H
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#define ngspice_MISSING_MATH_H
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bool AlmostEqualUlps(double, double, int);
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#ifndef HAVE_ERFC
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extern double erfc(double);
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#endif
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#ifndef HAVE_LOGB
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extern double logb(double);
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#endif
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#ifndef HAVE_SCALB
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extern double scalb(double, double);
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#endif
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#ifndef HAVE_SCALBN
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extern double scalbn(double, int);
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#endif
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#if !HAVE_DECL_ISNAN
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#ifndef HAVE_ISNAN
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extern int isnan(double);
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#endif
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#endif
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#if !HAVE_DECL_ISINF
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#ifndef HAVE_ISINF
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#if defined(HAVE_FINITE) && (HAVE_DECL_ISNAN || defined (HAVE_ISNAN))
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#define isinf(x) (!finite(x) && !isnan(x))
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#define HAVE_ISINF
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#else
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#ifdef HAVE_IEEEFP_H
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extern int isinf(double);
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#endif
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#endif
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#else /* HAVE_ISINF */
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extern int isinf(double);
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#endif /* HAVE_ISINF */
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#endif /* HAVE_DECL_ISINF */
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#endif
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