2 files changed, 40 insertions, 16 deletions

diff --git a/set_bitsets.c b/set_bitsets.c
index 37a276b..3e4c257 100644
--- a/set_bitsets.c
+++ b/set_bitsets.c
@@ -8,7 +8,9 @@
 */
 
 #include "sets.h"
-#define SCOD sizeof(unsigned long long)
+#include <stdlib.h>
+#include <stdio.h>
+#define SCOD 8*sizeof(unsigned long long)
 
 int nbCells(int n){
 	if(n == (n/SCOD)*SCOD)
@@ -17,12 +19,19 @@ int nbCells(int n){
 		return n/SCOD+1;
 }
 
+int set_size(const set s){
+    return s.size;
+}
 
 set empty_set(int size){
 	set res;
+	int i;
 	res.size = size;
-
-	res.tab = malloc(SCOD*nbCells(size));
+	int N = nbCells(size);
+	res.tab = malloc(SCOD*N/8);
+	for(i = 0; i < N; i++)
+	    res.tab[i] = 0;
+	return res;
 }
 
 /*
@@ -40,9 +49,9 @@ set singleton(int size, int x){
 
 set copy_set(const set s){
 	set res = empty_set(s.size);
-	int N = nbCells(s.size()), i;
+	int N = nbCells(s.size), i;
 	for(i = 0; i < N; i++) 
-		res[i] = s[i];
+		res.tab[i] = s.tab[i];
 	return res;
 }
 
@@ -53,9 +62,9 @@ void delete_set(set a){
 void set_union_ip(set a, const set b){
 	if(a.size != b.size){
 		printf("Union failed : the sets don't have the same size\n");
-		exit 1;
+		exit(1);
 	}
-	int N = nbCells(a.size()), i;
+	int N = nbCells(a.size), i;
 	for(i = 0; i < N; i++) 
 		a.tab[i] = a.tab[i]|b.tab[i];
 }
@@ -63,9 +72,9 @@ void set_union_ip(set a, const set b){
 void set_inter_ip(set a, const set b){
 	if(a.size != b.size){
 		printf("Intersection failed : the sets don't have the same size\n");
-		exit 1;
+		exit(1);
 	}
-	int N = nbCells(a.size()), i;
+	int N = nbCells(a.size), i;
 	for(i = 0; i < N; i++) 
 		a.tab[i] = a.tab[i]&b.tab[i];
 }
@@ -74,9 +83,9 @@ void set_inter_ip(set a, const set b){
 void set_diff_ip(set a, const set b){
 	if(a.size != b.size){
 		printf("Difference failed : the sets don't have the same size\n");
-		exit 1;
+		exit(1);
 	}
-	int N = nbCells(a.size()), i;
+	int N = nbCells(a.size), i;
 	for(i = 0; i < N; i++) 
 		a.tab[i] = a.tab[i] & (~b.tab[i]);
 }
@@ -106,16 +115,16 @@ bool is_set_empty(const set s){
 	return true;
 }
 
-bool set_mem(int x, const set s){
+inline bool set_mem(int x, const set s){
 	return  (s.tab[x/SCOD]>>(x%SCOD))&1;
 }
 
 int dyadic_val(unsigned long long x){
 	if(x == 0){
 		printf("Infinite valuation\n");
-		exit 1;
+		exit (1);
 	}
-	int i
+	int i;
 	for(i=0; ((x>>i)&1) == 0; i++);
 	return i;
 }
@@ -126,7 +135,7 @@ int elt_of_set(const set s){
 		if(s.tab[i] != 0)
 
 	printf("No element in an empty set!\n");
-	exit 1;
+	exit(1);
 }
 
 //set set_add(int x, const set s);
@@ -141,5 +150,20 @@ void set_remove_ip(int x, set s){
 	s.tab[x/SCOD] = s.tab[x/SCOD] & (~(1<<(x%SCOD)));
 }
 
+void dump_set(const set s){
+    int i=0;
+    printf("[");
+    for(i=0; i < s.size; i++)
+	if(set_mem(i, s))
+	    printf(" %d ", i);
+    printf("] (%d)\n", s.size);
+}
 
+set full_set(int n) {
+    set r = empty_set(n);
+    int N=nbCells(r.size), i;
+    for(i=0; i< N; i++)
+	r.tab[i]=-1;
+    return r;
+}
 
diff --git a/sets.h b/sets.h
index ffdf82d..7774e7d 100644
--- a/sets.h
+++ b/sets.h
@@ -14,7 +14,7 @@
 
 #ifdef BITSETS
 typedef struct {
-    int N;
+    int size;
     unsigned long long* tab;
 } set;
 #endif