14 lines
270 B
C
14 lines
270 B
C
|
|
void wt1(float a[], unsigned long n, int isign,
|
|
void (*wtstep)(float [], unsigned long, int))
|
|
{
|
|
unsigned long nn;
|
|
|
|
if (n < 4) return;
|
|
if (isign >= 0) {
|
|
for (nn=n;nn>=4;nn>>=1) (*wtstep)(a,nn,isign);
|
|
} else {
|
|
for (nn=4;nn<=n;nn<<=1) (*wtstep)(a,nn,isign);
|
|
}
|
|
}
|