public static int Search(string pattern, string source, int startIndex)
{
char[] x = pattern.ToCharArray(), y = source.ToCharArray(startIndex, source.Length - startIndex);
int j, init, ell, state, m = x.Length, n = y.Length;
Graph aut;
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
/* Preprocessing */
aut = Automata.NewSuffixAutomaton(2 * (m + 2), 2 * (m + 2) * 65536);
BuildSuffixAutomaton(x, ref aut);
init = Automata.GetInitial(aut);
stopwatch.Stop();
preProcessTime = stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Restart();
/* Searching */
ell = 0;
state = init;
for (j = 0; j < n; ++j)
{
if (Automata.GetTarget(aut, state, y[j]) != -1)
{
++ell;
state = Automata.GetTarget(aut, state, y[j]);
}
else
{
while (state != init &&
Automata.GetTarget(aut, state, y[j]) == -1)
{
state = Automata.GetSuffixLink(aut, state);
}
if (Automata.GetTarget(aut, state, y[j]) != -1)
{
ell = Automata.GetLength(aut, state) + 1;
state = Automata.GetTarget(aut, state, y[j]);
}
else
{
ell = 0;
state = init;
}
}
if (ell == m)
{
stopwatch.Stop();
searchTime = stopwatch.Elapsed.TotalMilliseconds;
return(j - m + 1 + startIndex);
}
}
stopwatch.Stop();
searchTime = stopwatch.Elapsed.TotalMilliseconds;
return(-1);
}
public static int Search(string pattern, string source, int startIndex)
{
char[] x = pattern.ToCharArray(), y = source.ToCharArray(startIndex, source.Length - startIndex);
int i, j, shift, period, init, state, m = x.Length, n = y.Length;
Graph aut;
char[] xR;
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
/* Preprocessing */
aut = Automata.NewSuffixAutomaton(2 * (m + 2), 2 * (m + 2) * 65536);
xR = Reverse(x);
BuildSuffixAutomaton(xR, ref aut);
init = Automata.GetInitial(aut);
period = m;
stopwatch.Stop();
preProcessTime = stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Restart();
/* Searching */
j = 0;
while (j <= n - m)
{
i = m - 1;
state = init;
shift = m;
while (i + j >= 0 &&
Automata.GetTarget(aut, state, y[i + j]) != -1)
{
state = Automata.GetTarget(aut, state, y[i + j]);
if (Automata.IsTerminal(aut, state))
{
period = shift;
shift = i;
}
--i;
}
if (i < 0)
{
stopwatch.Stop();
searchTime = stopwatch.Elapsed.TotalMilliseconds;
return(j + startIndex);
}
j += shift;
}
stopwatch.Stop();
searchTime = stopwatch.Elapsed.TotalMilliseconds;
return(-1);
}
public static List <int> Search(string pattern, string source)
{
char[] x = pattern.ToCharArray(), y = source.ToCharArray();
int period, i, j, shift, u, periodOfU, disp, init, state, mu, m = x.Length, n = y.Length;
int[] mpNext = new int[m + 1];
List <int> result = new List <int>();
char[] xR;
Graph aut;
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
/* Preprocessing */
aut = Automata.NewSuffixAutomaton(2 * (m + 2), 2 * (m + 2)
* 65536);
xR = Reverse(x);
BuildSuffixAutomaton(xR, ref aut);
init = Automata.GetInitial(aut);
PreMp(x, ref mpNext);
period = m - mpNext[m];
i = 0;
shift = m;
stopwatch.Stop();
preProcessTime = stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Restart();
/* Searching */
j = 0;
while (j <= n - m)
{
i = m - 1;
state = init;
u = m - 1 - shift;
periodOfU = (shift != m ? m - shift - mpNext[m - shift] : 0);
shift = m;
disp = 0;
while (i > u &&
Automata.GetTarget(aut, state, y[i + j]) != -1)
{
disp += Automata.GetShift(aut, state, y[i + j]);
state = Automata.GetTarget(aut, state, y[i + j]);
if (Automata.IsTerminal(aut, state))
{
shift = i;
}
--i;
}
if (i <= u)
{
if (disp == 0)
{
result.Add(j);
shift = period;
}
else
{
mu = (u + 1) / 2;
if (periodOfU <= mu)
{
u -= periodOfU;
while (i > u &&
Automata.GetTarget(aut, state, y[i + j]) != -1)
{
disp += Automata.GetShift(aut, state, y[i + j]);
state = Automata.GetTarget(aut, state, y[i + j]);
if (Automata.IsTerminal(aut, state))
{
shift = i;
}
--i;
}
if (i <= u)
{
shift = disp;
}
}
else
{
u = u - mu - 1;
while (i > u &&
Automata.GetTarget(aut, state, y[i + j]) != -1)
{
disp += Automata.GetShift(aut, state, y[i + j]);
state = Automata.GetTarget(aut, state, y[i + j]);
if (Automata.IsTerminal(aut, state))
{
shift = i;
}
--i;
}
}
}
}
j += shift;
}
stopwatch.Stop();
searchTime = stopwatch.Elapsed.TotalMilliseconds;
return(result);
}