Sylvestre Ledru
6149f49299
replaced by .editorconfig # ignore-this-changeset Differential Revision: https://phabricator.services.mozilla.com/D287878
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsMathUtils_h_
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#define nsMathUtils_h_
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#include "nscore.h"
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#include <cmath>
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#include <float.h>
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#if defined(XP_SOLARIS)
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# include <ieeefp.h>
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#endif
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/*
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* round
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*/
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inline double NS_round(double aNum) {
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return aNum >= 0.0 ? floor(aNum + 0.5) : ceil(aNum - 0.5);
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}
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inline float NS_roundf(float aNum) {
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return aNum >= 0.0f ? floorf(aNum + 0.5f) : ceilf(aNum - 0.5f);
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}
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inline int32_t NS_lround(double aNum) {
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return aNum >= 0.0 ? int32_t(aNum + 0.5) : int32_t(aNum - 0.5);
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}
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inline int32_t NS_lroundf(float aNum) {
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return aNum >= 0.0f ? int32_t(aNum + 0.5f) : int32_t(aNum - 0.5f);
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}
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/*
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* hypot. We don't need a super accurate version of this, if a platform
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* turns up with none of the possibilities below it would be okay to fall
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* back to sqrt(x*x + y*y).
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*/
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inline double NS_hypot(double aNum1, double aNum2) {
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#ifdef __GNUC__
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return __builtin_hypot(aNum1, aNum2);
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#elif defined _WIN32
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return _hypot(aNum1, aNum2);
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#else
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return hypot(aNum1, aNum2);
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#endif
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}
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/**
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* Returns the result of the modulo of x by y using a floored division.
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* fmod(x, y) is using a truncated division.
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* The main difference is that the result of this method will have the sign of
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* y while the result of fmod(x, y) will have the sign of x.
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*/
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inline double NS_floorModulo(double aNum1, double aNum2) {
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return (aNum1 - aNum2 * floor(aNum1 / aNum2));
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}
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#endif
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