OpenXM_contrib2/asir2000/engine/gfs.c - diff

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Diff for /OpenXM_contrib2/asir2000/engine/gfs.c between version 1.4 and 1.5

-version 1.4, 2001/03/29 09:49:58
+version 1.5, 2001/05/28 08:22:01
 Line 45
 Line 45
 Line 45
   * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
   * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
   *
-  * $OpenXM: OpenXM_contrib2/asir2000/engine/gfs.c,v 1.3 2001/03/14 06:27:57 noro Exp $
+  * $OpenXM: OpenXM_contrib2/asir2000/engine/gfs.c,v 1.4 2001/03/29 09:49:58 noro Exp $
  */
  #include "ca.h"
 Line 153  UM dp;
 Line 153  UM dp;
 Line 153  UM dp;
  {
          int i,r,rj,j,q;
+         if ( p == 2 && n == 1 )
+                 return 1;
          for ( i = 0, q = 1; i < n; i++ )
                   q *= p;
          for ( r = n==1?2:p; r < q; r++ ) {
-Line 192  int a,b;
+Line 195  int a,b;
 Line 192  int a,b;
 Line 195  int a,b;
          for ( i = dr, r = 0; i >= 0; i-- )
                  r = r*p+COEF(wc)[i];
          return r;
+ }
+ void gfs_galois_action(a,e,c)
+ GFS a;
+ Q e;
+ GFS *c;
+ {
+         Q p;
+         int i,k;
+         GFS t,s;
+         t = a;
+         k = QTOS(e);
+         STOQ(current_gfs_p,p);
+         for ( i = 0; i < k; i++ ) {
+                 pwrgfs(t,p,&s); t = s;
+         }
+         *c = t;
+ }
+ void qtogfs(a,c)
+ Q a;
+ GFS *c;
+ {
+         int s;
+         s = QTOS(a)%current_gfs_q;
+         if ( s < 0 )
+                 s += current_gfs_q;
+         if ( !s )
+                 *c = 0;
+         else
+                 MKGFS(current_gfs_ntoi[s],*c);
  }
  void mqtogfs(a,c)

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