/* deals with -ic-, -full, -ness etc. similar strategy to step3. */
public void PerformStep4(TokenSource source)
{
if (source.Size == 0)
{
return;
}
switch (source.LastChar)
{
case 'e':
if (source.ChangeSuffix("icate", "ic"))
{
break;
}
if (source.RemoveSuffix("ative"))
{
break;
}
source.ChangeSuffix("alize", "al");
break;
case 'i':
source.ChangeSuffix("iciti", "ic");
break;
case 'l':
if (source.ChangeSuffix("ical", "ic"))
{
break;
}
source.RemoveSuffix("ful");
break;
case 's':
source.RemoveSuffix("ness");
break;
}
}
public void PerformStep5(TokenSource source)
{
if (source.Size < 2)
{
return;
}
switch (source.Buffer[source.Size - 2])
{
case 'a':
source.RemoveSuffix("al");
return;
case 'c':
if (source.RemoveSuffix("ance"))
{
return;
}
source.RemoveSuffix("ence");
return;
case 'e':
source.RemoveSuffix("er");
return;
case 'i':
source.RemoveSuffix("ic");
return;
case 'l':
if (source.RemoveSuffix("able"))
{
return;
}
source.RemoveSuffix("ible");
return;
case 'n':
if (source.RemoveSuffix("ant"))
{
return;
}
if (source.RemoveSuffix("ement"))
{
return;
}
if (source.RemoveSuffix("ment"))
{
return;
}
source.RemoveSuffix("ent");
return;
case 'o':
if (source.ChangeSuffix("tion", "t"))
{
return;
}
if (source.ChangeSuffix("sion", "s"))
{
return;
}
source.RemoveSuffix("ou");
return;
case 's':
source.RemoveSuffix("ism");
return;
case 't':
if (source.RemoveSuffix("ate"))
{
return;
}
source.RemoveSuffix("iti");
return;
case 'u':
source.RemoveSuffix("ous");
return;
case 'v':
source.RemoveSuffix("ive");
return;
case 'z':
source.RemoveSuffix("ize");
return;
default:
return;
}
}
/* maps double suffices to single ones. so -ization ( = -ize plus
* -ation) maps to -ize etc. note that the string before the suffix must give
* m() > 0. */
public void PerformStep3(TokenSource source)
{
if (source.Size < 2)
{
return;
}
switch (source.Buffer[source.Size - 2])
{
case 'a':
if (source.ChangeSuffix("ational", "ate"))
{
break;
}
source.ChangeSuffix("tional", "tion");
break;
case 'c':
if (source.ChangeSuffix("enci", "ence"))
{
break;
}
source.ChangeSuffix("anci", "ance");
break;
case 'e':
source.ChangeSuffix("izer", "ize");
break;
case 'l':
if (source.ChangeSuffix("bli", "ble"))
{
break;
}
if (source.ChangeSuffix("alli", "al"))
{
break;
}
if (source.ChangeSuffix("entli", "ent"))
{
break;
}
if (source.ChangeSuffix("eli", "e"))
{
break;
}
source.ChangeSuffix("ousli", "ous");
break;
case 'o':
if (source.ChangeSuffix("ization", "ize"))
{
break;
}
if (source.ChangeSuffix("ation", "ate"))
{
break;
}
source.ChangeSuffix("ator", "ate");
break;
case 's':
if (source.ChangeSuffix("alism", "al"))
{
break;
}
if (source.ChangeSuffix("iveness", "ive"))
{
break;
}
if (source.ChangeSuffix("fulness", "ful"))
{
break;
}
source.ChangeSuffix("ousness", "ous");
break;
case 't':
if (source.ChangeSuffix("aliti", "al"))
{
break;
}
if (source.ChangeSuffix("iviti", "ive"))
{
break;
}
source.ChangeSuffix("biliti", "ble");
break;
case 'g':
source.ChangeSuffix("logi", "log");
break;
}
}