public static void IgnoreWhiteSpaceAndCommentsToNextLine(this IPreprocessorReader rdr)
{
char ch;
bool lineChangeFound;
while (!rdr.EOF)
{
ch = rdr.Peek();
if (ch == '\n')
{
rdr.Ignore(1);
break;
}
if (char.IsWhiteSpace(ch))
{
rdr.Ignore(1);
continue;
}
if (!rdr.IgnoreComments(out lineChangeFound))
{
break;
}
if (lineChangeFound)
{
break;
}
}
}
public static string ReadAndIgnoreNestableContent(this IPreprocessorReader rdr, string endToken)
{
var sb = new StringBuilder();
string str;
rdr.IgnoreWhiteSpaceAndComments(false);
while (!rdr.EOF)
{
str = rdr.PeekToken(false);
if (string.IsNullOrEmpty(str))
{
continue;
}
if (str == endToken)
{
rdr.Ignore(str.Length);
break;
}
else if (str == "(")
{
sb.Append(str);
rdr.Ignore(str.Length);
sb.Append(rdr.ReadAndIgnoreNestableContent(")"));
sb.Append(")");
}
else if (str == "{")
{
sb.Append(str);
rdr.Ignore(str.Length);
sb.Append(rdr.ReadAndIgnoreNestableContent("}"));
sb.Append("}");
}
else if (str == "[")
{
sb.Append(str);
rdr.Ignore(str.Length);
sb.Append(rdr.ReadAndIgnoreNestableContent("]"));
sb.Append("]");
}
else
{
sb.Append(str);
rdr.Ignore(str.Length);
}
}
return(sb.ToString());
}
public static string ReadAndIgnoreStringLiteral(this IPreprocessorReader rdr)
{
// This function assumes the next character to read is either " or '.
char quote = rdr.Peek();
rdr.Ignore(1);
char ch;
var sb = new StringBuilder();
sb.Append(quote);
while (!rdr.EOF)
{
ch = rdr.Peek();
if (ch == quote)
{
sb.Append(ch);
rdr.Ignore(1);
if (quote == '"' && rdr.Peek() == '"')
{
// Double "" means keep going
sb.Append('"');
rdr.Ignore(1);
}
else
{
break;
}
}
else if (ch == '\\')
{
sb.Append('\\');
rdr.Ignore(1);
if (!rdr.EOF)
{
sb.Append(rdr.Peek());
rdr.Ignore(1);
}
}
else
{
sb.Append(ch);
rdr.Ignore(1);
}
}
return(sb.ToString());
}
public static bool IgnoreComments(this IPreprocessorReader rdr, out bool lineChangeFound, bool multiLineOnly)
{
lineChangeFound = false;
if (rdr.Peek() == '/')
{
var str = rdr.Peek(2);
if (str == "/*")
{
rdr.Ignore(2);
//rdr.IgnoreUntil(c => c != '/' && c != '*' && c != '\r' && c != '\n');
rdr.IgnoreUntil(_multiLineCommentBreakChars);
char ch;
while (!rdr.EOF)
{
ch = rdr.Peek();
if (ch == '*')
{
if (rdr.Peek(2) == "*/")
{
rdr.Ignore(2);
return(true);
}
else
{
rdr.Ignore(1);
}
}
else if (ch == '/')
{
bool lineChange;
if (rdr.IgnoreComments(out lineChange, true))
{
if (lineChange)
{
lineChangeFound = true;
}
}
else
{
rdr.Ignore(1);
}
}
else if (ch == '\r' || ch == '\n')
{
lineChangeFound = true;
rdr.Ignore(1);
}
//rdr.IgnoreUntil(c => c != '/' && c != '*' && c != '\r' && c != '\n');
rdr.IgnoreUntil(_multiLineCommentBreakChars);
}
return(true);
}
else if (str == "//" && multiLineOnly == false)
{
//rdr.IgnoreUntil(c => c != '\r' && c != '\n');
rdr.IgnoreUntil(LineEndChars);
return(true);
}
}
return(false);
}