// --------------------------- Dequote ------------------------------
public static string Dequote(string InText, QuoteEncapsulation InQem)
{
int Lx = InText.Length + 2; // 2=quote chars.
char QuoteChar = InText[0];
StringBuilder sb = new StringBuilder(Lx);
int Ix = 0;
int EndIx = InText.Length - 2;
while (true)
{
++Ix;
if (Ix > EndIx)
{
break;
}
char ch1 = InText[Ix];
// using the escape method to enclose quote chars. This means the escape char
// is used to encapsulate other special characters in the quoted string.
// todo: dequote using "QuotedStringTraits" rules.
if ((ch1 == '\\') &&
(InQem == QuoteEncapsulation.Escape) &&
(Ix < (EndIx - 1)))
{
sb.Append(MaterializeEscapeChar(InText, Ix));
++Ix;
}
// quote char enquoted using the "double the char" method.
else if ((ch1 == QuoteChar) &&
(InQem == QuoteEncapsulation.Double) &&
(AcCommon.PullChar(InText, Ix + 1) == QuoteChar))
{
sb.Append(ch1);
++Ix;
}
// any other character. append to result string.
else
{
sb.Append(ch1);
}
}
return(sb.ToString( ));
}
// --------------------------- ScanCloseQuote ------------------------------
public static int ScanCloseQuote(
string InString, int InBx, QuoteEncapsulation InQem)
{
char QuoteChar = InString[InBx];
int cloqIx = -1;
for (int Ix = InBx + 1; Ix < InString.Length; ++Ix)
{
char ch1 = InString[Ix];
// using the escape method to enclose quote chars. This means the escape char
// is used to encapsulate other special characters in the quoted string.
// todo: dequote using "QuotedStringTraits" rules.
if ((ch1 == '\\') &&
(InQem == QuoteEncapsulation.Escape) &&
(Ix < (InString.Length - 1)))
{
++Ix;
}
// quote char enquoted using the "double the char" method.
else if ((ch1 == QuoteChar) &&
(InQem == QuoteEncapsulation.Double) &&
(AcCommon.PullChar(InString, Ix + 1) == QuoteChar))
{
++Ix;
}
// found the closing quote char.
else if (ch1 == QuoteChar)
{
cloqIx = Ix;
break;
}
}
return(cloqIx);
}
/// <summary>
/// Examine the string for its WordClassification content.
/// </summary>
/// <param name="InWord"></param>
/// <param name="InTraits"></param>
/// <returns></returns>
public static CharObjectPair CalcWordClassification(
string InWord, TextTraits InTraits)
{
int Fx = 0, Ix = 0;
WordClassification wc = WordClassification.None;
char braceChar = ' ';
char ch1 = AcCommon.PullChar(InWord, 0);
int Ex = InWord.Length - 1;
// is quoted. the word runs to the closing quote.
if (Scanner.IsOpenQuoteChar(ch1) == true)
{
Ix = Scanner.ScanCloseQuote(InWord, 0, InTraits.QuoteEncapsulation);
if (Ix == Ex)
{
wc = WordClassification.Quoted;
}
else
{
wc = WordClassification.MixedText;
}
}
// check if the string is a Braced or NameBraced word.
if (wc == WordClassification.None)
{
char[] combo = AcCommon.Concat(InTraits.DelimChars, InTraits.BraceChars);
Scanner.ScanCharResults results = Scanner.ScanEqual(InWord, 0, combo);
Fx = results.ResultPos;
ch1 = results.ResultChar;
// found a brace char
if ((InTraits.IsOpenBraceChar(ch1) == true) &&
(InTraits.IsDelimChar(ch1) == false))
{
Ix = Scanner.ScanCloseBrace(InWord, Fx);
if (Ix == Ex)
{
braceChar = ch1;
if (Fx == 0)
{
wc = WordClassification.Braced;
}
else
{
wc = WordClassification.NameBraced;
}
}
}
}
// word is all delimeter.
if (wc == WordClassification.None)
{
Fx = Scanner.ScanNotEqual(InWord, 0, InTraits.DelimChars).a;
if (Fx >= 0)
{
wc = WordClassification.Delimeter;
}
}
// check if a numeric string.
if (wc == WordClassification.None)
{
char[] digitChars =
new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.', '+', '-' };
Fx = Scanner.ScanNotEqual(InWord, 0, digitChars).a;
if (Fx == -1)
{
wc = WordClassification.Numeric;
try
{
double vx = double.Parse(InWord);
}
catch (Exception)
{
wc = WordClassification.None;
}
}
}
// any delim chars in the string. if not, the string is a name. otherwise, it is
// mixed.
if (wc == WordClassification.None)
{
Fx = Scanner.ScanEqual(InWord, 0, InTraits.DelimChars).a;
if (Fx == -1)
{
wc = WordClassification.Name;
}
else
{
wc = WordClassification.MixedText;
}
}
return(new CharObjectPair(braceChar, wc));
}