23char citcosi_C[] =
"$Header: /cvsroot/Lorene/C++/Source/Non_class_members/Coef/FFT991/citcosi.C,v 1.4 2014/10/15 12:48:21 j_novak Exp $" ;
132#include "proto_f77.h"
136int* facto_ini(
int ) ;
137double* trigo_ini(
int ) ;
138double* cheb_ini(
const int) ;
139double* chebimp_ini(
const int ) ;
142void citcosi(
const int* deg,
const int* dimc,
double* cf,
const int* dimf,
161 cout <<
"citcosi: nt > n2f : nt = " << nt <<
" , n2f = "
166 cout <<
"citcosi: nt > n2c : nt = " << nt <<
" , n2c = "
170 if ( (n1f > 1) && (n1c > n1f) ) {
171 cout <<
"citcosi: n1c > n1f : n1c = " << n1c <<
" , n1f = "
176 cout <<
"citcosi: n3c > n3f : n3c = " << n3c <<
" , n3f = "
186 int* facto = facto_ini(nm1) ;
187 double* trigo = trigo_ini(nm1) ;
190 double* sinp = cheb_ini(nt) ;
193 double* x = chebimp_ini(nt) ;
197 double* g = (
double*)( malloc( (nm1+2)*
sizeof(
double) ) ) ;
198 double* t1 = (
double*)( malloc( (nm1+2)*
sizeof(double) ) ) ;
208 int n2n3f = n2f * n3f ;
209 int n2n3c = n2c * n3c ;
217 int borne_phi = n1c-1 ;
218 if (n1f == 1) borne_phi = 1 ;
220 for (j=0; j< borne_phi; j++) {
224 for (k=0; k<n3c; k++) {
226 int i0 = n2n3c * j + k ;
227 double* cf0 = cf + i0 ;
230 double* ff0 = ff + i0 ;
235 t1[0] = .5 * cf0[0] ;
236 for (i=1; i<nm1; i++) t1[i] = .5 * ( cf0[n3c*i] + cf0[n3c*(i-1)] ) ;
237 t1[nm1] = .5 * cf0[n3c*(nt-2)] ;
255 for ( i = 3; i < nt; i += 2 ) {
256 ff0[ n3f*i ] = t1[i] - c1 ;
257 som += ff0[ n3f*i ] ;
261 double fmoins0 = nm1s2 * c1 + som ;
267 for ( i = 3; i < nt; i += 2 ) {
268 g[i] = 0.25 * ( ff0[ n3f*i ] - ff0[ n3f*(i-2) ] ) ;
281 for (i=2; i<nm1; i += 2 ) g[i] = 0.5 * t1[i] ;
288 F77_fft991( g, t1, trigo, facto, &inc, &jump, &nm1, &lot, &isign) ;
293 for ( i = 1; i < nm1s2 ; i++ ) {
297 double fp = 0.5 * ( g[i] + g[isym] ) ;
298 double fm = 0.5 * ( g[i] - g[isym] ) / sinp[i] ;
299 ff0[ n3f*i ] = ( fp + fm ) / x[isym] ;
300 ff0[ n3f*isym ] = ( fp - fm ) / x[i] ;
304 ff0[0] = g[0] + fmoins0 ;
306 ff0[ n3f*nm1s2 ] = g[nm1s2] / x[nm1s2] ;