23char citsini_C[] =
"$Header: /cvsroot/Lorene/C++/Source/Non_class_members/Coef/FFT991/citsini.C,v 1.4 2014/10/15 12:48:22 j_novak Exp $" ;
126#include "proto_f77.h"
130int* facto_ini(
int ) ;
131double* trigo_ini(
int ) ;
132double* cheb_ini(
const int) ;
133double* chebimp_ini(
const int ) ;
136void citsini(
const int* deg,
const int* dimc,
double* cf,
const int* dimf,
155 cout <<
"citsini: nt > n2f : nt = " << nt <<
" , n2f = "
161 cout <<
"citsini: nt > n2c : nt = " << nt <<
" , n2c = "
166 if ( (n1f > 1) && (n1c > n1f) ) {
167 cout <<
"citsini: n1c > n1f : n1c = " << n1c <<
" , n1f = "
173 cout <<
"citsini: n3c > n3f : n3c = " << n3c <<
" , n3f = "
184 int* facto = facto_ini(nm1) ;
185 double* trigo = trigo_ini(nm1) ;
188 double* sinp = cheb_ini(nt);
191 double* sinth = chebimp_ini(nt);
195 double* g = (
double*)( malloc( (nm1+2)*
sizeof(
double) ) ) ;
196 double* t1 = (
double*)( malloc( (nm1+2)*
sizeof(double) ) ) ;
206 int n2n3f = n2f * n3f ;
207 int n2n3c = n2c * n3c ;
216 int borne_phi = n1c-1 ;
217 if (n1f == 1) borne_phi = 1 ;
219 for (j=0; j< borne_phi; j++) {
223 for (k=0; k<n3c; k++) {
225 int i0 = n2n3c * j + k ;
226 double* cf0 = cf + i0 ;
229 double* ff0 = ff + i0 ;
234 t1[0] = .5 * cf0[0] ;
235 for (i=1; i<nm1; i++) {
236 t1[i] = .5 * ( cf0[ n3c*i ] - cf0[ n3c*(i-1) ] ) ;
238 t1[nm1] = -.5 * cf0[ n3c*(nt-2) ] ;
256 for ( i = 3; i < nt; i += 2 ) {
257 ff0[ n3f*i ] = t1[i] - c1 ;
258 som += ff0[ n3f*i ] ;
262 double fmoins0 = nm1s2 * c1 + som ;
268 for ( i = 3; i < nt; i += 2 ) {
269 g[i] = 0.25 * ( ff0[ n3f*i ] - ff0[ n3f*(i-2) ] ) ;
282 for (i=2; i<nm1; i += 2 ) g[i] = 0.5 * t1[i] ;
289 F77_fft991( g, t1, trigo, facto, &inc, &jump, &nm1, &lot, &isign) ;
294 for ( i = 1; i < nm1s2 ; i++ ) {
298 double fp = 0.5 * ( g[i] + g[isym] ) ;
299 double fm = 0.5 * ( g[i] - g[isym] ) / sinp[i] ;
300 ff0[ n3f*i ] = ( fp + fm ) / sinth[i] ;
301 ff0[ n3f*isym ] = ( fp - fm ) / sinth[isym] ;
306 ff0[ n3f*nm1 ] = g[0] - fmoins0 ;
307 ff0[ n3f*nm1s2 ] = g[nm1s2] / sinth[nm1s2];