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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/dktools/dk3mad.h
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+/*
+ WARNING: This file was generated by dkct.
+ Changes you make here will be lost if dkct is run again!
+ You should modify the original source and run dkct on it.
+ Original source: dk3mad.ctr
+*/
+
+/*
+Copyright (C) 2014-2017, Dirk Krause
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above opyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+* Neither the name of the author nor the names of contributors may be used
+ to endorse or promote products derived from this software without specific
+ prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.
+IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef DK3MAD_H_INCLUDED
+/** Avoid multiple inclusions. */
+#define DK3MAD_H_INCLUDED 1
+
+
+#line 10 "dk3mad.ctr"
+
+/** @file dk3mad.h Mathematical operations on double numbers.
+
+Note: You should not use dk3ma_d_add_ok(), dk3ma_d_sub_ok(),
+dk3ma_d_mul_ok(), dk3ma_d_div_ok() and dk3ma_d_div_ok()
+for new programs.
+Perform the calculations traditionally and use the
+functions from the dk3mafpe module to check for floating point exceptions.
+
+*/
+
+#include <dk3conf.h>
+
+#include <stdio.h>
+#if DK3_HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if DK3_HAVE_STDINT
+#include <stdint.h>
+#endif
+#if DK3_HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+#if DK3_HAVE_LIMITS_H
+#include <limits.h>
+#endif
+#if DK3_HAVE_MATH_H
+#include <math.h>
+#endif
+#if DK3_HAVE_FLOAT_H
+#include <float.h>
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Absolute value.
+ @param x Original value.
+ @return Absolute value of x.
+*/
+double
+dk3ma_d_abs(double x);
+
+/** Rounding to next integer.
+ @param x Double value.
+ @return Value rounded to nearest integer.
+*/
+double
+dk3ma_d_rint(double x);
+
+/** Addition.
+ @param a Left operand.
+ @param b Right operand.
+ @param ec Pointer to error code variable, may be NULL.
+ The variable may be set to DK3_ERROR_MATH_OVERFLOW when returning.
+ @return Summary of a and b.
+*/
+double
+dk3ma_d_add_ok(double a, double b, int *ec);
+
+/** Substraction.
+ @param a Left operand.
+ @param b Right operand.
+ @param ec Pointer to error code variable, may be NULL.
+ The variable may be set to DK3_ERROR_MATH_OVERFLOW when returning.
+ @return Difference of a and b.
+*/
+double
+dk3ma_d_sub_ok(double a, double b, int *ec);
+
+/** Multiplication.
+ @param a Left operand.
+ @param b Right operand.
+ @param ec Pointer to error code variable, may be NULL.
+ The variable may be set to DK3_ERROR_MATH_OVERFLOW when returning.
+ @return Product of a and b.
+*/
+double
+dk3ma_d_mul_ok(double a, double b, int *ec);
+
+/** Division.
+ @param a Left operand (nominator).
+ @param b Right operand (denominator).
+ @param ec Pointer to error code variable, may be NULL.
+ The variable may be set to DK3_ERROR_MATH_OVERFLOW or
+ DK3_ERROR_MATH_DIVZERO when returning.
+ @return Fraction of a and b.
+*/
+double
+dk3ma_d_div_ok(double a, double b, int *ec);
+
+/** Square root.
+ @param x Original value.
+ @param ec Pointer to error code variable, may be NULL.
+ The variable may be set to DK3_ERROR_MATH_OUT_OF_RANGE
+ if the input is negative.
+ @return Square root of x.
+*/
+double
+dk3ma_d_square_ok(double x, int *ec);
+
+/** Equality check.
+ @param a Left operand.
+ @param b Right operand.
+ @param epsilon Maximum allowed difference between a and b.
+ @return 1 for equal values, 0 for unequal values.
+*/
+int
+dk3ma_d_equal(double a, double b, double epsilon);
+
+/** Arcus tangens for two lengths.
+ @param y Y length (height).
+ @param x X length (width).
+ @return Angle alpha for y/x = tan(alpha).
+*/
+double
+dk3ma_d_atan2(double y, double x);
+
+/** Restrict number of digits following the decimal dot.
+ @param x Original value.
+ @param n Number of digits after decimal dot.
+ @return Rounded result.
+*/
+double
+dk3ma_d_restrict_digits(double x, size_t n);
+
+/** Restrict number of digits following the decimal dot,
+ round downwards.
+ @param x Original value.
+ @param n Number of digits after decimal dot.
+ @return Rounded result.
+*/
+double
+dk3ma_d_restrict_digits_floor(double x, size_t n);
+
+/** Restrict number of digits following the decimal dot,
+ round upwards.
+ @param x Original value.
+ @param n Number of digits after decimal dot.
+ @return Rounded result.
+*/
+double
+dk3ma_d_restrict_digits_ceil(double x, size_t n);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif