static CommandLine()
{
using (StringReader stringReader = new StringReader(Environment.CommandLine))
using (BasicReader reader = new BasicReader(stringReader, StringComparer.Ordinal, disposeReader: false))
{
// just in case
reader.AdvanceWhitespace();
char first;
if (reader.TryPeek(out first))
{
if (first == '"')
{
reader.Skip(1);
Path = reader.ReadUntil(c => c == '"');
reader.Skip(1);
}
else
Path = reader.ReadUntil(char.IsWhiteSpace);
// skip whitespace
if (!reader.Eof)
reader.Skip(1);
// dirty hack to read to eof
Arguments = reader.ReadUntil(c => false);
}
}
}
protected virtual void ParseUnquotedString(TokenWriter tokenWriter, BasicReader reader)
{
// record position for later
int pos = reader.Position;
StringBuilder val = new StringBuilder();
// escape char + stop chars
char[] stopChars = new[] { '`', ' ', '\t', '\r', '\n', '}', ')', '=' };
do
{
string tmp = reader.ReadUntil(stopChars.Contains);
val.Append(tmp);
char chr;
if (reader.TryPeek(out chr))
{
if (chr == '`')
{
// escape char, so skip one
reader.Read();
// then process the next
val.Append(reader.Read());
}
else
{
break; // exit
}
}
}
while (!reader.Eof);
tokenWriter.Add(new Token(TokenType.StringValue, val.ToString(), pos, reader.Position - pos));
}
protected virtual void ParseQuotedString(TokenWriter tokenWriter, BasicReader reader)
{
// record position for later
int pos = reader.Position;
// skip leading quote
char quoteChar = reader.Read();
StringBuilder val = new StringBuilder();
// escape char + quote char
char[] stopChars = new[] { '`', quoteChar };
do
{
string tmp = reader.ReadUntil(stopChars.Contains);
val.Append(tmp);
char chr;
if (reader.TryPeek(out chr))
{
if (chr == '`')
{
// escape char, so skip one
reader.Read();
// then process the next
val.Append(reader.Read());
}
else if (chr == quoteChar)
{
break; // exit
}
}
else
{
throw new Exception("Premature end of stream");
}
}
while (!reader.Eof);
// skip trailing quote
reader.Skip(1);
tokenWriter.Add(new Token(TokenType.StringValue, val.ToString(), pos, reader.Position - pos));
}
protected virtual void ParseParameter(TokenWriter tokenWriter, BasicReader reader)
{
if (!reader.StartsWith(ParameterIndicator))
throw new InvalidOperationException(String.Format("Cannot parse paramer, expected {0}.", ParameterIndicator));
reader.Skip(1);
int startPos = reader.Position;
StringBuilder name = new StringBuilder();
char next;
while (reader.TryPeek(out next) && next != ':' && !char.IsWhiteSpace(next))
{
name.Append(reader.Read());
}
if (!reader.Eof && next == ':')
{
tokenWriter.Add(new Token(TokenType.SwitchParameter, name.ToString(), startPos, reader.Position - startPos));
reader.Skip(1); // skip the :
this.ParseOne(tokenWriter, reader);
}
else
tokenWriter.Add(new Token(TokenType.ParameterName, name.ToString(), startPos, reader.Position - startPos));
}