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* Iterators.
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6980544467
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1 changed files with 73 additions and 6 deletions
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@ -9,7 +9,7 @@ using namespace std;
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class ATermMap
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{
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private:
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public:
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struct KeyValue
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{
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@ -17,6 +17,8 @@ private:
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ATerm value;
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};
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private:
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/* Hash table for the map. We use open addressing, i.e., all
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key/value pairs are stored directly in the table, and there are
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no pointers. Collisions are resolved through probing. */
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@ -33,6 +35,7 @@ private:
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unsigned int maxCount;
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public:
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/* Create a map. `expectedCount' is the number of elements the
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map is expected to hold. */
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ATermMap(unsigned int expectedCount);
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@ -51,7 +54,50 @@ public:
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unsigned int size();
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struct const_iterator
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{
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const ATermMap & map;
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unsigned int pos;
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const_iterator(const ATermMap & map, int pos) : map(map)
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{
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this->pos = pos;
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}
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bool operator !=(const const_iterator & i)
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{
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return pos != i.pos;
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}
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void operator ++()
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{
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if (pos == map.capacity) return;
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do { ++pos;
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} while (pos < map.capacity && map.hashTable[pos].value == 0);
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}
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const KeyValue & operator *()
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{
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assert(pos < map.capacity);
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return map.hashTable[pos];
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}
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const KeyValue * operator ->()
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{
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assert(pos < map.capacity);
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return &map.hashTable[pos];
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}
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};
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const_iterator begin() const
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{
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unsigned int i = 0;
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while (i < capacity && hashTable[i].value == 0) ++i;
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return const_iterator(*this, i);
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}
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const_iterator end() const
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{
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return const_iterator(*this, capacity);
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}
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private:
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void init(unsigned int expectedCount);
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void free();
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@ -305,7 +351,7 @@ int main(int argc, char * * argv)
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for (int test = 0; test < 100000; ++test) {
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// cerr << test << endl;
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//cerr << test << endl;
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unsigned int n = 300;
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ATermMap map(300);
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ATerm keys[n], values[n];
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@ -313,24 +359,45 @@ int main(int argc, char * * argv)
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keys[i] = someTerm();
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values[i] = someTerm();
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map.set(keys[i], values[i]);
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// cerr << "INSERT: " << keys[i] << " " << values[i] << endl;
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//cerr << "INSERT: " << keys[i] << " " << values[i] << endl;
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}
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unsigned int size = map.size();
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assert(size <= n);
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values[n - 1] = 0;
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map.remove(keys[n - 1]);
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assert(map.size() == size - 1);
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unsigned int checksum;
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unsigned int count = 0;
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for (ATermMap::const_iterator i = map.begin(); i != map.end(); ++i, ++count) {
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assert(i->key);
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assert(i->value);
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checksum += (unsigned int) (*i).key;
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checksum += (unsigned int) (*i).value;
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// cout << (*i).key << " " << (*i).value << endl;
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}
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assert(count == size - 1);
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for (unsigned int i = 0; i < n; ++i) {
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for (unsigned int j = i + 1; j < n; ++j)
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if (keys[i] == keys[j]) goto x;
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if (map.get(keys[i]) != values[i]) {
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for (unsigned int j = i + 1; j < n; ++j)
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if (keys[i] == keys[j]) goto x;
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cerr << "MISMATCH: " << keys[i] << " " << values[i] << " " << map.get(keys[i]) << " " << i << endl;
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abort();
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x: ;
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}
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if (values[i] != 0) {
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checksum -= (unsigned int) keys[i];
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checksum -= (unsigned int) values[i];
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}
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x: ;
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}
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assert(checksum == 0);
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for (unsigned int i = 0; i < 100; ++i)
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map.get(someTerm());
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}
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cout << "RESIZES: " << nrResizes << " "
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