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- /****************************************************************************
- *
- * Program Name : ADJACENC.C
- *
- * Written By : Eng-Huat Ong and Kian-Mong Low.
- *
- * This program generate the possible adjacent terms given the minterm.
- * It then computes the adjacency of the minterm base on the possible
- * adjacent terms generated.
- *
- * Returns adjacency of the given minterm.
- *
- * --------------------------------------------------------------------------
- * Copyright (c) 1992. All Rights Reserved. Nanyang Technological
- * University.
- *
- * You are free to use, copy and distribute this software and its
- * documentation providing that:
- *
- * NO FEE IS CHARGED FOR USE, COPYING OR DISTRIBUTION.
- *
- * IT IS NOT MODIFIED IN ANY WAY.
- *
- * THE COPYRIGHT NOTICE APPEAR IN ALL COPIES.
- *
- * This program is provided "AS IS" without any warranty, expressed or
- * implied, including but not limited to fitness for any particular
- * purpose.
- *
- * If you find NTUMIN fast, easy, and useful, a note or comment would be
- * appreciated. Please send to:
- *
- * Boon-Tiong Tan or Othman Bin Ahmad
- * School of EEE
- * Nanyang Technological University
- * Nanyang Avenue
- * Singapore 2263
- * Republic of Singapore
- *
- ***************************************************************************/
-
- #include <stdio.h>
- #include <stdlib.h>
-
- unsigned char adjacency(temp, a)
- unsigned char *a, *temp;
-
-
- {
- unsigned short m;
- unsigned char *adjterm;
- unsigned char i, j, nspm, n, adj;
- char test;
-
-
- n = *a; /* no. if variables */
- nspm = *(a+3); /* no. of bytes/minterm */
- m = *(a+2)<<8 | *(a+1); /* no. of minterms */
-
- adjterm = (unsigned char *) malloc(nspm+1); /* temporary storage */
- if (adjterm == 0)
- {
- printf("Out of memory -- ADJACENC, *adjterm\n");
- printf("Program Terminated - 1\n");
- exit(0);
- }
-
- adj = 0;
-
- for (i=0; i<n; i++)
- {
- for (j=0; j<nspm; j++) /* generate possible adjacent terms */
- {
- if ((i/8) == j)
- *(adjterm+j) = *(temp+j) ^ (1<<(i%8)); /* XOR */
- else
- *(adjterm+j) = *(temp+j);
- }
-
- test = exist(adjterm, a, m);
- if (test == 0) /* exist in a-array */
- adj++;
- }
-
- free(adjterm); /* free pointer */
-
- return(adj); /* return adjacency */
- }
-
-
-