/* * Copyright (c) 2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /******************************************************************************* * * * File: gamma9.c * * * * Contains: Legacy gamma(). * * * * Copyright © 2001 Apple Computer, Inc. All rights reserved. * * * * Written by Stephen C. Peters, started in November 2001. * * * * A MathLib v5 file. * * * * Change History (most recent first): * * * * 12 Dec 01 scp First created. * * * * W A R N I N G: * * These routines require a 64-bit double precision IEEE-754 model. * * * * A version of gcc higher than 932 is required. * * * * GCC compiler options: * * optimization level 3 (-O3) * * -fschedule-insns -finline-functions -funroll-all-loops * * * *******************************************************************************/ #include "math.h" int signgam; double gamma ( double x ) { double g = tgamma ( x ); // return *True* gamma a la MacOS9 Mathlib signgam = (g < 0.0 ? -1 : 1); // set signgam as a courtesy. return g; } double gamma_r ( double x, int *psigngam ) { double g = tgamma ( x ); // return *True* gamma a la MacOS9 Mathlib *psigngam = (g < 0.0 ? -1 : 1); return g; }