mirror of
https://github.com/levinsv/pgadmin3.git
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100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
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/*
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* M_APM - mapmhsin.c
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*
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* Copyright (C) 2000 - 2007 Michael C. Ring
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*
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* Permission to use, copy, and distribute this software and its
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* documentation for any purpose with or without fee is hereby granted,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation.
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*
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* Permission to modify the software is granted. Permission to distribute
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* the modified code is granted. Modifications are to be distributed by
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* using the file 'license.txt' as a template to modify the file header.
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* 'license.txt' is available in the official MAPM distribution.
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*
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* This software is provided "as is" without express or implied warranty.
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*/
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/*
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*
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* This file contains the Hyperbolic SIN, COS, & TAN functions.
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*/
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#include "pgAdmin3.h"
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#include "pgscript/utilities/mapm-lib/m_apm_lc.h"
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/****************************************************************************/
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/*
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* sinh(x) == 0.5 * [ exp(x) - exp(-x) ]
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*/
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void m_apm_sinh(M_APM rr, int places, M_APM aa)
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{
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M_APM tmp1, tmp2, tmp3;
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int local_precision;
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tmp1 = M_get_stack_var();
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tmp2 = M_get_stack_var();
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tmp3 = M_get_stack_var();
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local_precision = places + 4;
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m_apm_exp(tmp1, local_precision, aa);
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m_apm_reciprocal(tmp2, local_precision, tmp1);
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m_apm_subtract(tmp3, tmp1, tmp2);
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m_apm_multiply(tmp1, tmp3, MM_0_5);
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m_apm_round(rr, places, tmp1);
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M_restore_stack(3);
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}
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/****************************************************************************/
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/*
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* cosh(x) == 0.5 * [ exp(x) + exp(-x) ]
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*/
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void m_apm_cosh(M_APM rr, int places, M_APM aa)
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{
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M_APM tmp1, tmp2, tmp3;
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int local_precision;
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tmp1 = M_get_stack_var();
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tmp2 = M_get_stack_var();
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tmp3 = M_get_stack_var();
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local_precision = places + 4;
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m_apm_exp(tmp1, local_precision, aa);
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m_apm_reciprocal(tmp2, local_precision, tmp1);
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m_apm_add(tmp3, tmp1, tmp2);
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m_apm_multiply(tmp1, tmp3, MM_0_5);
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m_apm_round(rr, places, tmp1);
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M_restore_stack(3);
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}
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/****************************************************************************/
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/*
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* tanh(x) == [ exp(x) - exp(-x) ] / [ exp(x) + exp(-x) ]
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*/
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void m_apm_tanh(M_APM rr, int places, M_APM aa)
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{
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M_APM tmp1, tmp2, tmp3, tmp4;
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int local_precision;
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tmp1 = M_get_stack_var();
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tmp2 = M_get_stack_var();
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tmp3 = M_get_stack_var();
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tmp4 = M_get_stack_var();
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local_precision = places + 4;
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m_apm_exp(tmp1, local_precision, aa);
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m_apm_reciprocal(tmp2, local_precision, tmp1);
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m_apm_subtract(tmp3, tmp1, tmp2);
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m_apm_add(tmp4, tmp1, tmp2);
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m_apm_divide(tmp1, local_precision, tmp3, tmp4);
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m_apm_round(rr, places, tmp1);
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M_restore_stack(4);
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}
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/****************************************************************************/
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