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/*----------------------------------------------------------------------------
ADOL-C -- Automatic Differentiation by Overloading in C++
File: vfunc_simplevec.cpp
Revision: $Id$
Contents: Example of function module containing a simple vector example
Each << function module >> contains:
(1) const char* const controlFileName
(2) int indepDim;
(3) int depDim;
(4) void initProblemParameters( void )
(5) void initIndependents( double* indeps )
(6) void originalVectorFunction( double* indeps, double* deps )
(7) void tapingVectorFunction( int tag, double* indeps, double* deps )
Copyright (c) Andrea Walther, Andreas Griewank, Andreas Kowarz,
Hristo Mitev, Sebastian Schlenkrich, Jean Utke, Olaf Vogel
This file is part of ADOL-C. This software is provided as open source.
Any use, reproduction, or distribution of the software constitutes
recipient's acceptance of the terms of the accompanying license file.
---------------------------------------------------------------------------*/
#define _VFUNC_SIMPLEVEC_C_
/****************************************************************************/
/* INCLUDES */
#include <adolc/adolc.h>
#include <time.h>
#include <cstdlib>
/****************************************************************************/
/* GLOBAL VARIABLES */
/*--------------------------------------------------------------------------*/
/* Control file name */
const char* controlFileName = "simplevec.ctrl";
/*--------------------------------------------------------------------------*/
/* Dimensions */
int indepDim;
int depDim;
/*--------------------------------------------------------------------------*/
/* Other problem dependent parameters */
//static unsigned short int dx[3]; /* variable needed by erand48(.) */
/****************************************************************************/
/* INIT PROBLEM PARAMETERS */
void initProblemParameters( void ) {
fprintf(stdout,"A SIMPLE VECTOR FUNCTION (ADOL-C Example)\n\n");
/* number of indeps & deps */
if (indepDim < 1) {
fprintf(stdout," # of independents = ? ");
fscanf(stdin,"%d",&indepDim);
fprintf(stdout,"\n");
}
if (depDim < 1) {
fprintf(stdout," # of dependents = ? ");
fscanf(stdin,"%d",&depDim);
fprintf(stdout,"\n");
}
/* Init erand48(); */
struct tm s;
time_t t;
time(&t);
s=*localtime(&t);
srand(s.tm_sec*s.tm_min);
/* dx[0]=rand();
dx[1]=rand();
dx[2]=rand();*/
}
/****************************************************************************/
/* INITIALIZE INDEPs */
void initIndependents( double* indeps ) {
for (int i=0; i<indepDim; i++)
indeps[i] = (double)rand();
}
/****************************************************************************/
/* ORIGINAL SCALAR FUNCTION */
/*--------------------------------------------------------------------------*/
/* The simple vector function */
void simplevec( int n, int m, double* indeps, double* deps ) {
int i, j;
double temp = 1.0;
for (j=0; j<m; j++) {
deps[j] = temp;
for (i=0; i<n; i++)
deps[j] *= indeps[i];
temp = deps[j];
}
}
/*--------------------------------------------------------------------------*/
/* The interface function */
void originalVectorFunction( double* indeps, double* deps ) {
simplevec(indepDim,depDim,indeps,deps);
}
/****************************************************************************/
/* TAPING SCALAR FUNCTION */
/*--------------------------------------------------------------------------*/
/* The simple adouble vector function */
void activeSimplevec( int n, int m, adouble* indeps, adouble* deps ) {
int i, j;
adouble temp = 1.0;
for (j=0; j<m; j++) {
deps[j] = temp;
for (i=0; i<n; i++)
deps[j] *= indeps[i];
temp = deps[j];
}
}
/*--------------------------------------------------------------------------*/
/* The interface function */
void tapingVectorFunction( int tag, double* indeps, double* deps ) {
int i;
trace_on(tag);
adouble* activeIndeps = new adouble[indepDim];
adouble* activeDeps = new adouble[depDim];
adouble* aIP = activeIndeps;
double* iP = indeps;
for (i=0; i<indepDim; i++)
*aIP++ <<= *iP++;
activeSimplevec(indepDim,depDim,activeIndeps,activeDeps);
aIP = activeDeps;
iP = deps;
for (i=0; i<depDim; i++)
*aIP++ >>= *iP++;
trace_off();
}
#undef _VFUNC_SIMPLEVEC_C_
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