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Img_c0.c
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Img_c0.c
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/* Copyright (c) 2014, Giuseppe Argentieri <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 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 HOLDER 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.
*
*/
/*
* =====================================================================================
*
* Filename: Img_c0.c
*
* Description:
*
* Version: 1.0
* Created: 15/04/2013 13:43:02
* Revision: none
* Compiler: gcc
*
* Author: Giuseppe Argentieri (ga), [email protected]
* Organization:
*
* =====================================================================================
*/
#include "funcs.h"
int im_gc0 ( void* params, double* val, double* error )
{
struct f_params* pars = (struct f_params*) params ;
double o_c, b, O, o_1, alpha ;
assign_p ( pars, &o_c, &b, &O, &o_1 ) ;
alpha = pars->alpha ;
double ei, Ei, err1, err2 ;
expi( O/o_c, &ei, &err1 ) ;
expi_plus ( O/o_c, &Ei, &err2 ) ;
double v = -alpha*(o_c+(O/2)*(exp(O/o_c)*(ei) - exp(-O/o_c)*(Ei))) ;
*val = v ;
double err = (alpha*O/2) * (exp(O/o_c)*err1 + exp(-O/o_c)*err2) ;
*error = err ;
return 0;
}