📄 wrap_c.mht

📁 常用的DSP算法集锦

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Date: Wed, 27 Sep 2006 22:42:00 +0800
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<BODY><PRE>/* wrap.c - circular wrap of pointer p, relative to array w =
*/

void wrap(M, w, p)
double *w, **p;
int M;
{
       if (*p &gt; w + M) =20
              *p -=3D M + 1;          /* when \(*p=3Dw+M+1\), it wraps =
around to \(*p=3Dw\) */

       if (*p &lt; w) =20
              *p +=3D M + 1;          /* when \(*p=3Dw-1\), it wraps =
around to \(*p=3Dw+M\) */
}
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