///////////////////////////////////////////////////////////////////////////////////////////////
private static IDictionary <char, long> Intersection(
IDictionary <char, long> X,
IDictionary <char, long> Y
)
{
IDictionary <char, long> result = null;
if ((X != null) && (Y != null))
{
result = new CharLongDictionary();
foreach (KeyValuePair <char, long> pair in X)
{
long value;
if (Y.TryGetValue(pair.Key, out value))
{
result.Add(pair.Key,
pair.Value + value); /* ADD ONLY */
}
}
}
return(result);
}
///////////////////////////////////////////////////////////////////////////////////////////////
private static void CharsToDictionary(
StringBuilder characters,
ref IDictionary <char, long> keyFlags
)
{
if (characters != null)
{
if (keyFlags == null)
{
keyFlags = new CharLongDictionary();
}
for (int index = 0; index < characters.Length; index++)
{
char character = characters[index];
if (keyFlags.ContainsKey(character))
{
keyFlags[character]++;
}
else
{
keyFlags.Add(character, 1);
}
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////////
private static IDictionary <char, long> CharsToDictionary(
IEnumerable <char> characters
)
{
if (characters != null)
{
IDictionary <char, long> result = new CharLongDictionary();
foreach (char character in characters)
{
if (result.ContainsKey(character))
{
result[character]++;
}
else
{
result.Add(character, 1);
}
}
return(result);
}
return(null);
}
///////////////////////////////////////////////////////////////////////////////////////////////
#region Dead Code
#if DEAD_CODE
private static IDictionary <char, long> Union(
IDictionary <char, long> X,
IDictionary <char, long> Y
)
{
IDictionary <char, long> result = null;
if ((X != null) || (Y != null))
{
result = new CharLongDictionary();
if (X != null)
{
foreach (KeyValuePair <char, long> pair in X)
{
result.Add(pair); /* ADD ONLY */
}
if (Y != null)
{
foreach (KeyValuePair <char, long> pair in Y)
{
if (result.ContainsKey(pair.Key))
{
result[pair.Key] += pair.Value;
}
else
{
result.Add(pair);
}
}
}
}
else
{
foreach (KeyValuePair <char, long> pair in Y)
{
result.Add(pair); /* ADD ONLY */
}
}
}
return(result);
}
///////////////////////////////////////////////////////////////////////////////////////////////
private static IDictionary <char, long> Difference(
IDictionary <char, long> X,
IDictionary <char, long> Y
)
{
IDictionary <char, long> result = null;
if (X != null)
{
result = new CharLongDictionary();
foreach (KeyValuePair <char, long> pair in X)
{
if ((Y == null) || !Y.ContainsKey(pair.Key))
{
result.Add(pair); /* ADD ONLY */
}
}
}
return(result);
}
///////////////////////////////////////////////////////////////////////////////////////////////
private static bool Union(
IDictionary <long, IDictionary <char, long> > X,
StringBuilder Y,
long key,
bool strict
)
{
if ((X == null) || (Y == null))
{
return(false);
}
IDictionary <char, long> keyFlags;
if (!X.TryGetValue(key, out keyFlags))
{
keyFlags = new CharLongDictionary();
X.Add(key, keyFlags); /* ADD ONLY */
}
else if (keyFlags == null)
{
//
// NOTE: This code cannot be reached.
//
if (strict)
{
return(false);
}
keyFlags = new CharLongDictionary();
X[key] = keyFlags; /* REPLACE ONLY */
}
/* NO RESULT */
CharsToDictionary(Y, ref keyFlags);
return(true);
}
