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-rw-r--r--src/misc/espresso/set.c820
1 files changed, 820 insertions, 0 deletions
diff --git a/src/misc/espresso/set.c b/src/misc/espresso/set.c
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+++ b/src/misc/espresso/set.c
@@ -0,0 +1,820 @@
+/*
+ * Revision Control Information
+ *
+ * $Source$
+ * $Author$
+ * $Revision$
+ * $Date$
+ *
+ */
+/*
+ * set.c -- routines for maniuplating sets and set families
+ */
+
+/* LINTLIBRARY */
+
+#include "espresso.h"
+static pset_family set_family_garbage = NULL;
+
+static int intcpy(d, s, n)
+register unsigned int *d, *s;
+register long n;
+{
+ register int i;
+ for(i = 0; i < n; i++) {
+ *d++ = *s++;
+ }
+}
+
+
+/* bit_index -- find first bit (from LSB) in a word (MSB=bit n, LSB=bit 0) */
+int bit_index(a)
+register unsigned int a;
+{
+ register int i;
+ if (a == 0)
+ return -1;
+ for(i = 0; (a & 1) == 0; a >>= 1, i++)
+ ;
+ return i;
+}
+
+
+/* set_ord -- count number of elements in a set */
+int set_ord(a)
+register pset a;
+{
+ register int i, sum = 0;
+ register unsigned int val;
+ for(i = LOOP(a); i > 0; i--)
+ if ((val = a[i]) != 0)
+ sum += count_ones(val);
+ return sum;
+}
+
+/* set_dist -- distance between two sets (# elements in common) */
+int set_dist(a, b)
+register pset a, b;
+{
+ register int i, sum = 0;
+ register unsigned int val;
+ for(i = LOOP(a); i > 0; i--)
+ if ((val = a[i] & b[i]) != 0)
+ sum += count_ones(val);
+ return sum;
+}
+
+/* set_clear -- make "r" the empty set of "size" elements */
+pset set_clear(r, size)
+register pset r;
+int size;
+{
+ register int i = LOOPINIT(size);
+ *r = i; do r[i] = 0; while (--i > 0);
+ return r;
+}
+
+/* set_fill -- make "r" the universal set of "size" elements */
+pset set_fill(r, size)
+register pset r;
+register int size;
+{
+ register int i = LOOPINIT(size);
+ *r = i;
+ r[i] = ~ (unsigned) 0;
+ r[i] >>= i * BPI - size;
+ while (--i > 0)
+ r[i] = ~ (unsigned) 0;
+ return r;
+}
+
+/* set_copy -- copy set a into set r */
+pset set_copy(r, a)
+register pset r, a;
+{
+ register int i = LOOPCOPY(a);
+ do r[i] = a[i]; while (--i >= 0);
+ return r;
+}
+
+/* set_and -- compute intersection of sets "a" and "b" */
+pset set_and(r, a, b)
+register pset r, a, b;
+{
+ register int i = LOOP(a);
+ PUTLOOP(r,i); do r[i] = a[i] & b[i]; while (--i > 0);
+ return r;
+}
+
+/* set_or -- compute union of sets "a" and "b" */
+pset set_or(r, a, b)
+register pset r, a, b;
+{
+ register int i = LOOP(a);
+ PUTLOOP(r,i); do r[i] = a[i] | b[i]; while (--i > 0);
+ return r;
+}
+
+/* set_diff -- compute difference of sets "a" and "b" */
+pset set_diff(r, a, b)
+register pset r, a, b;
+{
+ register int i = LOOP(a);
+ PUTLOOP(r,i); do r[i] = a[i] & ~b[i]; while (--i > 0);
+ return r;
+}
+
+/* set_xor -- compute exclusive-or of sets "a" and "b" */
+pset set_xor(r, a, b)
+register pset r, a, b;
+{
+ register int i = LOOP(a);
+#ifdef IBM_WATC
+ PUTLOOP(r,i); do r[i] = (a[i]&~b[i]) | (~a[i]&b[i]); while (--i > 0);
+#else
+ PUTLOOP(r,i); do r[i] = a[i] ^ b[i]; while (--i > 0);
+#endif
+ return r;
+}
+
+/* set_merge -- compute "a" & "mask" | "b" & ~ "mask" */
+pset set_merge(r, a, b, mask)
+register pset r, a, b, mask;
+{
+ register int i = LOOP(a);
+ PUTLOOP(r,i); do r[i] = (a[i]&mask[i]) | (b[i]&~mask[i]); while (--i > 0);
+ return r;
+}
+
+/* set_andp -- compute intersection of sets "a" and "b" , TRUE if nonempty */
+bool set_andp(r, a, b)
+register pset r, a, b;
+{
+ register int i = LOOP(a);
+ register unsigned int x = 0;
+ PUTLOOP(r,i); do {r[i] = a[i] & b[i]; x |= r[i];} while (--i > 0);
+ return x != 0;
+}
+
+/* set_orp -- compute union of sets "a" and "b" , TRUE if nonempty */
+bool set_orp(r, a, b)
+register pset r, a, b;
+{
+ register int i = LOOP(a);
+ register unsigned int x = 0;
+ PUTLOOP(r,i); do {r[i] = a[i] | b[i]; x |= r[i];} while (--i > 0);
+ return x != 0;
+}
+
+/* setp_empty -- check if the set "a" is empty */
+bool setp_empty(a)
+register pset a;
+{
+ register int i = LOOP(a);
+ do if (a[i]) return FALSE; while (--i > 0);
+ return TRUE;
+}
+
+/* setp_full -- check if the set "a" is the full set of "size" elements */
+bool setp_full(a, size)
+register pset a;
+register int size;
+{
+ register int i = LOOP(a);
+ register unsigned int test;
+ test = ~ (unsigned) 0;
+ test >>= i * BPI - size;
+ if (a[i] != test)
+ return FALSE;
+ while (--i > 0)
+ if (a[i] != (~(unsigned) 0))
+ return FALSE;
+ return TRUE;
+}
+
+/* setp_equal -- check if the set "a" equals set "b" */
+bool setp_equal(a, b)
+register pset a, b;
+{
+ register int i = LOOP(a);
+ do if (a[i] != b[i]) return FALSE; while (--i > 0);
+ return TRUE;
+}
+
+/* setp_disjoint -- check if intersection of "a" and "b" is empty */
+bool setp_disjoint(a, b)
+register pset a, b;
+{
+ register int i = LOOP(a);
+ do if (a[i] & b[i]) return FALSE; while (--i > 0);
+ return TRUE;
+}
+
+/* setp_implies -- check if "a" implies "b" ("b" contains "a") */
+bool setp_implies(a, b)
+register pset a, b;
+{
+ register int i = LOOP(a);
+ do if (a[i] & ~b[i]) return FALSE; while (--i > 0);
+ return TRUE;
+}
+
+/* sf_or -- form the "or" of all sets in a set family */
+pset sf_or(A)
+pset_family A;
+{
+ register pset or, last, p;
+
+ or = set_new(A->sf_size);
+ foreach_set(A, last, p)
+ INLINEset_or(or, or, p);
+ return or;
+}
+
+/* sf_and -- form the "and" of all sets in a set family */
+pset sf_and(A)
+pset_family A;
+{
+ register pset and, last, p;
+
+ and = set_fill(set_new(A->sf_size), A->sf_size);
+ foreach_set(A, last, p)
+ INLINEset_and(and, and, p);
+ return and;
+}
+
+/* sf_active -- make all members of the set family active */
+pset_family sf_active(A)
+pset_family A;
+{
+ register pset p, last;
+ foreach_set(A, last, p) {
+ SET(p, ACTIVE);
+ }
+ A->active_count = A->count;
+ return A;
+}
+
+
+/* sf_inactive -- remove all inactive cubes in a set family */
+pset_family sf_inactive(A)
+pset_family A;
+{
+ register pset p, last, pdest;
+
+ pdest = A->data;
+ foreach_set(A, last, p) {
+ if (TESTP(p, ACTIVE)) {
+ if (pdest != p) {
+ INLINEset_copy(pdest, p);
+ }
+ pdest += A->wsize;
+ } else {
+ A->count--;
+ }
+ }
+ return A;
+}
+
+
+/* sf_copy -- copy a set family */
+pset_family sf_copy(R, A)
+pset_family R, A;
+{
+ R->sf_size = A->sf_size;
+ R->wsize = A->wsize;
+/*R->capacity = A->count;*/
+/*R->data = REALLOC(unsigned int, R->data, (long) R->capacity * R->wsize);*/
+ R->count = A->count;
+ R->active_count = A->active_count;
+ intcpy(R->data, A->data, (long) A->wsize * A->count);
+ return R;
+}
+
+
+/* sf_join -- join A and B into a single set_family */
+pset_family sf_join(A, B)
+pset_family A, B;
+{
+ pset_family R;
+ long asize = A->count * A->wsize;
+ long bsize = B->count * B->wsize;
+
+ if (A->sf_size != B->sf_size) fatal("sf_join: sf_size mismatch");
+ R = sf_new(A->count + B->count, A->sf_size);
+ R->count = A->count + B->count;
+ R->active_count = A->active_count + B->active_count;
+ intcpy(R->data, A->data, asize);
+ intcpy(R->data + asize, B->data, bsize);
+ return R;
+}
+
+
+/* sf_append -- append the sets of B to the end of A, and dispose of B */
+pset_family sf_append(A, B)
+pset_family A, B;
+{
+ long asize = A->count * A->wsize;
+ long bsize = B->count * B->wsize;
+
+ if (A->sf_size != B->sf_size) fatal("sf_append: sf_size mismatch");
+ A->capacity = A->count + B->count;
+ A->data = REALLOC(unsigned int, A->data, (long) A->capacity * A->wsize);
+ intcpy(A->data + asize, B->data, bsize);
+ A->count += B->count;
+ A->active_count += B->active_count;
+ sf_free(B);
+ return A;
+}
+
+
+/* sf_new -- allocate "num" sets of "size" elements each */
+pset_family sf_new(num, size)
+int num, size;
+{
+ pset_family A;
+ if (set_family_garbage == NULL) {
+ A = ALLOC(set_family_t, 1);
+ } else {
+ A = set_family_garbage;
+ set_family_garbage = A->next;
+ }
+ A->sf_size = size;
+ A->wsize = SET_SIZE(size);
+ A->capacity = num;
+ A->data = ALLOC(unsigned int, (long) A->capacity * A->wsize);
+ A->count = 0;
+ A->active_count = 0;
+ return A;
+}
+
+
+/* sf_save -- create a duplicate copy of a set family */
+pset_family sf_save(A)
+register pset_family A;
+{
+ return sf_copy(sf_new(A->count, A->sf_size), A);
+}
+
+
+/* sf_free -- free the storage allocated for a set family */
+void sf_free(A)
+pset_family A;
+{
+ FREE(A->data);
+ A->next = set_family_garbage;
+ set_family_garbage = A;
+}
+
+
+/* sf_cleanup -- free all of the set families from the garbage list */
+void sf_cleanup()
+{
+ register pset_family p, pnext;
+ for(p = set_family_garbage; p != (pset_family) NULL; p = pnext) {
+ pnext = p->next;
+ FREE(p);
+ }
+ set_family_garbage = (pset_family) NULL;
+}
+
+
+/* sf_addset -- add a set to the end of a set family */
+pset_family sf_addset(A, s)
+pset_family A;
+pset s;
+{
+ register pset p;
+
+ if (A->count >= A->capacity) {
+ A->capacity = A->capacity + A->capacity/2 + 1;
+ A->data = REALLOC(unsigned int, A->data, (long) A->capacity * A->wsize);
+ }
+ p = GETSET(A, A->count++);
+ INLINEset_copy(p, s);
+ return A;
+}
+
+/* sf_delset -- delete a set from a set family */
+void sf_delset(A, i)
+pset_family A;
+int i;
+{ (void) set_copy(GETSET(A,i), GETSET(A, --A->count));}
+
+/* sf_print -- print a set_family as a set (list the element numbers) */
+void sf_print(A)
+pset_family A;
+{
+ char *ps1();
+ register pset p;
+ register int i;
+ foreachi_set(A, i, p)
+ printf("A[%d] = %s\n", i, ps1(p));
+}
+
+/* sf_bm_print -- print a set_family as a bit-matrix */
+void sf_bm_print(A)
+pset_family A;
+{
+ char *pbv1();
+ register pset p;
+ register int i;
+ foreachi_set(A, i, p)
+ printf("[%4d] %s\n", i, pbv1(p, A->sf_size));
+}
+
+
+/* sf_write -- output a set family in an unintelligable manner */
+void sf_write(fp, A)
+FILE *fp;
+pset_family A;
+{
+ register pset p, last;
+ (void) fprintf(fp, "%d %d\n", A->count, A->sf_size);
+ foreach_set(A, last, p)
+ set_write(fp, p);
+ (void) fflush(fp);
+}
+
+
+/* sf_read -- read a set family written by sf_write */
+pset_family sf_read(fp)
+FILE *fp;
+{
+ int i, j;
+ register pset p, last;
+ pset_family A;
+
+ (void) fscanf(fp, "%d %d\n", &i, &j);
+ A = sf_new(i, j);
+ A->count = i;
+ foreach_set(A, last, p) {
+ (void) fscanf(fp, "%x", p);
+ for(j = 1; j <= LOOP(p); j++)
+ (void) fscanf(fp, "%x", p+j);
+ }
+ return A;
+}
+
+
+/* set_write -- output a set in an unintelligable manner */
+void set_write(fp, a)
+register FILE *fp;
+register pset a;
+{
+ register int n = LOOP(a), j;
+
+ for(j = 0; j <= n; j++) {
+ (void) fprintf(fp, "%x ", a[j]);
+ if ((j+1) % 8 == 0 && j != n)
+ (void) fprintf(fp, "\n\t");
+ }
+ (void) fprintf(fp, "\n");
+}
+
+
+/* sf_bm_read -- read a set family written by sf_bm_print (almost) */
+pset_family sf_bm_read(fp)
+FILE *fp;
+{
+ int i, j, rows, cols;
+ register pset pdest;
+ pset_family A;
+
+ (void) fscanf(fp, "%d %d\n", &rows, &cols);
+ A = sf_new(rows, cols);
+ for(i = 0; i < rows; i++) {
+ pdest = GETSET(A, A->count++);
+ (void) set_clear(pdest, A->sf_size);
+ for(j = 0; j < cols; j++) {
+ switch(getc(fp)) {
+ case '0':
+ break;
+ case '1':
+ set_insert(pdest, j);
+ break;
+ default:
+ fatal("Error reading set family");
+ }
+ }
+ if (getc(fp) != '\n') {
+ fatal("Error reading set family (at end of line)");
+ }
+ }
+ return A;
+}
+
+
+
+/* ps1 -- convert a set into a printable string */
+#define largest_string 120
+static char s1[largest_string];
+char *ps1(a)
+register pset a;
+{
+ register int i, num, l, len = 0, n = NELEM(a);
+ char temp[20];
+ bool first = TRUE;
+
+ s1[len++] = '[';
+ for(i = 0; i < n; i++)
+ if (is_in_set(a,i)) {
+ if (! first)
+ s1[len++] = ',';
+ first = FALSE; num = i;
+ /* Generate digits (reverse order) */
+ l = 0; do temp[l++] = num % 10 + '0'; while ((num /= 10) > 0);
+ /* Copy them back in correct order */
+ do s1[len++] = temp[--l]; while (l > 0);
+ if (len > largest_string-15) {
+ s1[len++] = '.'; s1[len++] = '.'; s1[len++] = '.';
+ break;
+ }
+ }
+
+ s1[len++] = ']';
+ s1[len++] = '\0';
+ return s1;
+}
+
+/* pbv1 -- print bit-vector */
+char *pbv1(s, n)
+pset s;
+int n;
+{
+ register int i;
+ for(i = 0; i < n; i++)
+ s1[i] = is_in_set(s,i) ? '1' : '0';
+ s1[n] = '\0';
+ return s1;
+}
+
+
+/* set_adjcnt -- adjust the counts for a set by "weight" */
+void
+set_adjcnt(a, count, weight)
+register pset a;
+register int *count, weight;
+{
+ register int i, base;
+ register unsigned int val;
+
+ for(i = LOOP(a); i > 0; ) {
+ for(val = a[i], base = --i << LOGBPI; val != 0; base++, val >>= 1) {
+ if (val & 1) {
+ count[base] += weight;
+ }
+ }
+ }
+}
+
+
+
+/* sf_count -- perform a column sum over a set family */
+int *sf_count(A)
+pset_family A;
+{
+ register pset p, last;
+ register int i, base, *count;
+ register unsigned int val;
+
+ count = ALLOC(int, A->sf_size);
+ for(i = A->sf_size - 1; i >= 0; i--) {
+ count[i] = 0;
+ }
+
+ foreach_set(A, last, p) {
+ for(i = LOOP(p); i > 0; ) {
+ for(val = p[i], base = --i << LOGBPI; val != 0; base++, val >>= 1) {
+ if (val & 1) {
+ count[base]++;
+ }
+ }
+ }
+ }
+ return count;
+}
+
+
+/* sf_count_restricted -- perform a column sum over a set family, restricting
+ * to only the columns which are in r; also, the columns are weighted by the
+ * number of elements which are in each row
+ */
+int *sf_count_restricted(A, r)
+pset_family A;
+register pset r;
+{
+ register pset p;
+ register int i, base, *count;
+ register unsigned int val;
+ int weight;
+ pset last;
+
+ count = ALLOC(int, A->sf_size);
+ for(i = A->sf_size - 1; i >= 0; i--) {
+ count[i] = 0;
+ }
+
+ /* Loop for each set */
+ foreach_set(A, last, p) {
+ weight = 1024 / (set_ord(p) - 1);
+ for(i = LOOP(p); i > 0; ) {
+ for(val=p[i]&r[i], base= --i<<LOGBPI; val!=0; base++, val >>= 1) {
+ if (val & 1) {
+ count[base] += weight;
+ }
+ }
+ }
+ }
+ return count;
+}
+
+
+/*
+ * sf_delc -- delete columns first ... last of A
+ */
+pset_family sf_delc(A, first, last)
+pset_family A;
+int first, last;
+{
+ return sf_delcol(A, first, last-first + 1);
+}
+
+
+/*
+ * sf_addcol -- add columns to a set family; includes a quick check to see
+ * if there is already enough room (and hence, can avoid copying)
+ */
+pset_family sf_addcol(A, firstcol, n)
+pset_family A;
+int firstcol, n;
+{
+ int maxsize;
+
+ /* Check if adding columns at the end ... */
+ if (firstcol == A->sf_size) {
+ /* If so, check if there is already enough room */
+ maxsize = BPI * LOOPINIT(A->sf_size);
+ if ((A->sf_size + n) <= maxsize) {
+ A->sf_size += n;
+ return A;
+ }
+ }
+ return sf_delcol(A, firstcol, -n);
+}
+
+/*
+ * sf_delcol -- add/delete columns to/from a set family
+ *
+ * if n > 0 then n columns starting from firstcol are deleted if n < 0
+ * then n blank columns are inserted starting at firstcol
+ * (i.e., the first new column number is firstcol)
+ *
+ * This is done by copying columns in the array which is a relatively
+ * slow operation.
+ */
+pset_family sf_delcol(A, firstcol, n)
+pset_family A;
+register int firstcol, n;
+{
+ register pset p, last, pdest;
+ register int i;
+ pset_family B;
+
+ B = sf_new(A->count, A->sf_size - n);
+ foreach_set(A, last, p) {
+ pdest = GETSET(B, B->count++);
+ INLINEset_clear(pdest, B->sf_size);
+ for(i = 0; i < firstcol; i++)
+ if (is_in_set(p, i))
+ set_insert(pdest, i);
+ for(i = n > 0 ? firstcol + n : firstcol; i < A->sf_size; i++)
+ if (is_in_set(p, i))
+ set_insert(pdest, i - n);
+ }
+ sf_free(A);
+ return B;
+}
+
+
+/*
+ * sf_copy_col -- copy column "srccol" from "src" to column "dstcol" of "dst"
+ */
+pset_family sf_copy_col(dst, dstcol, src, srccol)
+pset_family dst, src;
+int dstcol, srccol;
+{
+ register pset last, p, pdest;
+ register int word_test, word_set;
+ unsigned int bit_set, bit_test;
+
+ /* CHEAT! form these constants outside the loop */
+ word_test = WHICH_WORD(srccol);
+ bit_test = 1 << WHICH_BIT(srccol);
+ word_set = WHICH_WORD(dstcol);
+ bit_set = 1 << WHICH_BIT(dstcol);
+
+ pdest = dst->data;
+ foreach_set(src, last, p) {
+ if ((p[word_test] & bit_test) != 0)
+ pdest[word_set] |= bit_set;
+/*
+ * equivalent code for this is ...
+ * if (is_in_set(p, srccol)) set_insert(pdest, destcol);
+ */
+ pdest += dst->wsize;
+ }
+ return dst;
+}
+
+
+
+/*
+ * sf_compress -- delete columns from a matrix
+ */
+pset_family sf_compress(A, c)
+pset_family A; /* will be freed */
+register pset c;
+{
+ register pset p;
+ register int i, bcol;
+ pset_family B;
+
+ /* create a clean set family for the result */
+ B = sf_new(A->count, set_ord(c));
+ for(i = 0; i < A->count; i++) {
+ p = GETSET(B, B->count++);
+ INLINEset_clear(p, B->sf_size);
+ }
+
+ /* copy each column of A which has a 1 in c */
+ bcol = 0;
+ for(i = 0; i < A->sf_size; i++) {
+ if (is_in_set(c, i)) {
+ (void) sf_copy_col(B, bcol++, A, i);
+ }
+ }
+ sf_free(A);
+ return B;
+}
+
+
+
+/*
+ * sf_transpose -- transpose a bit matrix
+ *
+ * There are trickier ways of doing this, but this works.
+ */
+pset_family sf_transpose(A)
+pset_family A;
+{
+ pset_family B;
+ register pset p;
+ register int i, j;
+
+ B = sf_new(A->sf_size, A->count);
+ B->count = A->sf_size;
+ foreachi_set(B, i, p) {
+ INLINEset_clear(p, B->sf_size);
+ }
+ foreachi_set(A, i, p) {
+ for(j = 0; j < A->sf_size; j++) {
+ if (is_in_set(p, j)) {
+ set_insert(GETSET(B, j), i);
+ }
+ }
+ }
+ sf_free(A);
+ return B;
+}
+
+
+/*
+ * sf_permute -- permute the columns of a set_family
+ *
+ * permute is an array of integers containing column numbers of A which
+ * are to be retained.
+ */
+pset_family sf_permute(A, permute, npermute)
+pset_family A;
+register int *permute, npermute;
+{
+ pset_family B;
+ register pset p, last, pdest;
+ register int j;
+
+ B = sf_new(A->count, npermute);
+ B->count = A->count;
+ foreach_set(B, last, p)
+ INLINEset_clear(p, npermute);
+
+ pdest = B->data;
+ foreach_set(A, last, p) {
+ for(j = 0; j < npermute; j++)
+ if (is_in_set(p, permute[j]))
+ set_insert(pdest, j);
+ pdest += B->wsize;
+ }
+ sf_free(A);
+ return B;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 14:57:28 +0000