/**
* Handles 'W' cases
*/
private int HandleW(string value,
DoubleMetaphoneResult result,
int index)
{
// PIN: In scandinavian languages the W is not a Vowel but another V - which is handled as V
return(HandleV(value, result, index));
// PIN: THE BELOW IS NOT USED
if (Contains(value, index, 2, "WR"))
{
// can also be in middle of word
result.Append('R');
index += 2;
}
else
{
if (index == 0 && (IsVowel(CharAt(value, index + 1)) ||
Contains(value, index, 2, "WH")))
{
if (IsVowel(CharAt(value, index + 1)))
{
// Wasserman should match Vasserman
result.Append('A', 'F');
}
else
{
// need Uomo to match Womo
result.Append('A');
}
index++;
}
else if ((index == value.Length - 1 && IsVowel(CharAt(value, index - 1))) ||
Contains(value, index - 1,
5, "EWSKI", "EWSKY", "OWSKI", "OWSKY") ||
Contains(value, 0, 3, "SCH"))
{
// Arnow should match Arnoff
result.AppendAlternate('F');
index++;
}
else if (Contains(value, index, 4, "WICZ", "WITZ"))
{
// Polish e.g. "filipowicz"
result.Append("TS", "FX");
index += 4;
}
else
{
index++;
}
}
return(index);
}
/**
* Handles 'R' cases
*/
private int HandleR(string value,
DoubleMetaphoneResult result,
int index,
bool slavoGermanic)
{
//french e.g. 'rogier', but exclude 'hochmeier'
if (index == value.Length - 1 && !slavoGermanic &&
Contains(value, index - 2, 2, "IE") &&
!Contains(value, index - 4, 2, "ME", "MA"))
{
result.AppendAlternate('R');
}
else
{
result.Append('R');
}
return(CharAt(value, index + 1) == 'R' ? index + 2 : index + 1);
}
/**
* Handles 'L' cases
*/
private int HandleL(string value, DoubleMetaphoneResult result, int index)
{
// PIN: do not add another L if the last added character was also a L
if (!result.GetPrimary().ToUpper().EndsWith("L"))
{
result.Append('L');
}
// PIN: Todo: handle spanish e.g. 'cabrillo', 'gallegos'
// one example can be found here: http://swoodbridge.com/DoubleMetaPhone/double_metaphone_func_1-01.txt
if (CharAt(value, index + 1) == 'L')
{
if (ConditionL0(value, index))
{
result.AppendAlternate(' ');
}
index += 2;
}
else
{
index++;
}
return(index);
}
/**
* Handles 'R' cases
*/
private int HandleR(string value,
DoubleMetaphoneResult result,
int index,
bool slavoGermanic)
{
//french e.g. 'rogier', but exclude 'hochmeier'
if (index == value.Length - 1 && !slavoGermanic &&
Contains(value, index - 2, 2, "IE") &&
!Contains(value, index - 4, 2, "ME", "MA"))
{
result.AppendAlternate('R');
}
else
{
result.Append('R');
}
return CharAt(value, index + 1) == 'R' ? index + 2 : index + 1;
}
/**
* Handles 'L' cases
*/
private int HandleL(string value, DoubleMetaphoneResult result, int index)
{
// PIN: do not add another L if the last added character was also a L
if (!result.GetPrimary().ToUpper().EndsWith("L")) {
result.Append('L');
}
// PIN: Todo: handle spanish e.g. 'cabrillo', 'gallegos'
// one example can be found here: http://swoodbridge.com/DoubleMetaPhone/double_metaphone_func_1-01.txt
if (CharAt(value, index + 1) == 'L')
{
if (ConditionL0(value, index))
{
result.AppendAlternate(' ');
}
index += 2;
}
else
{
index++;
}
return index;
}
/**
* Handles 'W' cases
*/
private int HandleW(string value,
DoubleMetaphoneResult result,
int index)
{
// PIN: In scandinavian languages the W is not a Vowel but another V - which is handled as V
return HandleV(value, result, index);
// PIN: THE BELOW IS NOT USED
if (Contains(value, index, 2, "WR"))
{
// can also be in middle of word
result.Append('R');
index += 2;
}
else
{
if (index == 0 && (IsVowel(CharAt(value, index + 1)) ||
Contains(value, index, 2, "WH")))
{
if (IsVowel(CharAt(value, index + 1)))
{
// Wasserman should match Vasserman
result.Append('A', 'F');
}
else
{
// need Uomo to match Womo
result.Append('A');
}
index++;
}
else if ((index == value.Length - 1 && IsVowel(CharAt(value, index - 1))) ||
Contains(value, index - 1,
5, "EWSKI", "EWSKY", "OWSKI", "OWSKY") ||
Contains(value, 0, 3, "SCH"))
{
// Arnow should match Arnoff
result.AppendAlternate('F');
index++;
}
else if (Contains(value, index, 4, "WICZ", "WITZ"))
{
// Polish e.g. "filipowicz"
result.Append("TS", "FX");
index += 4;
}
else
{
index++;
}
}
return index;
}
/**
* Handles 'S' cases
*/
private int HandleS(string value,
DoubleMetaphoneResult result,
int index,
bool slavoGermanic)
{
if (Contains(value, index - 1, 3, "ISL", "YSL"))
{
// special cases "island", "isle", "carlisle", "carlysle"
index++;
}
else if (index == 0 && Contains(value, index, 5, "SUGAR"))
{
// special case "sugar-"
result.Append('X', 'S');
index++;
}
else if (Contains(value, index, 2, "SH"))
{
if (Contains(value, index + 1, 4,
"HEIM", "HOEK", "HOLM", "HOLZ"))
{
// germanic
result.Append('S');
}
else
{
result.Append('X');
}
index += 2;
}
else if (Contains(value, index, 3, "SIO", "SIA") || Contains(value, index, 4, "SIAN"))
{
// Italian and Armenian
if (slavoGermanic)
{
result.Append('S');
}
else
{
result.Append('S', 'X');
}
index += 3;
}
else if ((index == 0 && Contains(value, index + 1, 1, "M", "N", "L", "W")) || Contains(value, index + 1, 1, "Z"))
{
// german & anglicisations, e.g. "smith" match "schmidt" //
// "snider" match "schneider"
// also, -sz- in slavic language altho in hungarian it //
// is pronounced "s"
result.Append('S', 'X');
index = Contains(value, index + 1, 1, "Z") ? index + 2 : index + 1;
}
else if (Contains(value, index, 2, "SC"))
{
index = HandleSC(value, result, index);
}
else
{
if (index == value.Length - 1 && Contains(value, index - 2,
2, "AI", "OI"))
{
// french e.g. "resnais", "artois"
result.AppendAlternate('S');
}
else
{
result.Append('S');
}
index = Contains(value, index + 1, 1, "S", "Z") ? index + 2 : index + 1;
}
return index;
}
/**
* Handles 'S' cases
*/
private int HandleS(string value,
DoubleMetaphoneResult result,
int index,
bool slavoGermanic)
{
if (Contains(value, index - 1, 3, "ISL", "YSL"))
{
// special cases "island", "isle", "carlisle", "carlysle"
index++;
}
else if (index == 0 && Contains(value, index, 5, "SUGAR"))
{
// special case "sugar-"
result.Append('X', 'S');
index++;
}
else if (Contains(value, index, 2, "SH"))
{
if (Contains(value, index + 1, 4,
"HEIM", "HOEK", "HOLM", "HOLZ"))
{
// germanic
result.Append('S');
}
else
{
result.Append('X');
}
index += 2;
}
else if (Contains(value, index, 3, "SIO", "SIA") || Contains(value, index, 4, "SIAN"))
{
// Italian and Armenian
if (slavoGermanic)
{
result.Append('S');
}
else
{
result.Append('S', 'X');
}
index += 3;
}
else if ((index == 0 && Contains(value, index + 1, 1, "M", "N", "L", "W")) || Contains(value, index + 1, 1, "Z"))
{
// german & anglicisations, e.g. "smith" match "schmidt" //
// "snider" match "schneider"
// also, -sz- in slavic language altho in hungarian it //
// is pronounced "s"
result.Append('S', 'X');
index = Contains(value, index + 1, 1, "Z") ? index + 2 : index + 1;
}
else if (Contains(value, index, 2, "SC"))
{
index = HandleSC(value, result, index);
}
else
{
if (index == value.Length - 1 && Contains(value, index - 2,
2, "AI", "OI"))
{
// french e.g. "resnais", "artois"
result.AppendAlternate('S');
}
else
{
result.Append('S');
}
index = Contains(value, index + 1, 1, "S", "Z") ? index + 2 : index + 1;
}
return(index);
}