public static bool Parse(SeekableReader r, out System system)
{
if (!Unit.Parse(r, out Unit? u))
{
throw new InvalidSystemException("No core star");
}
system = new System()
{
Core = u
};
while (r.Peek() == ' ')
{
while (r.Peek() == ' ') // w+
{
r.Read();
}
if (!Companion.Parse(r, out Companion? companion) || companion == null)
{
throw new InvalidSystemException("Expected companion");
}
system.Companions.Add(companion);
}
return(true);
}
public static bool Parse(SeekableReader r, out System system)
{
Unit u;
if (!Unit.Parse(r, out u))
{
throw new InvalidSystemException("No core star");
}
system = new System();
system.Core = u;
while (r.Peek() == ' ')
{
while (r.Peek() == ' ') // w+
{
r.Read();
}
Companion companion;
if (!Companion.Parse(r, out companion))
{
throw new InvalidSystemException("Expected companion");
}
system.Companions.Add(companion);
}
return(true);
}
public static bool Parse(SeekableReader r, out FarCompanion far)
{
if (r.Peek() != '[')
{
far = null;
return(false);
}
far = new FarCompanion();
r.Read(); // '['
if (!System.Parse(r, out far.Companion))
{
throw new InvalidSystemException("Invalid far companion");
}
if (r.Read() != ']')
{
throw new InvalidSystemException("Unclosed far companion");
}
return(true);
}
public static bool Parse(SeekableReader r, out Pair pair)
{
if (r.Peek() != '(')
{
pair = null;
return(false);
}
pair = new Pair();
r.Read(); // "("
if (!Star.Parse(r, out pair.Star1))
{
throw new InvalidSystemException("Invalid star within pair");
}
if (r.Peek() != ' ') // w+
{
throw new InvalidSystemException("Missing whitespace within pair");
}
while (r.Peek() == ' ')
{
r.Read();
}
if (!Star.Parse(r, out pair.Star2))
{
throw new InvalidSystemException("Invalid star within pair");
}
if (r.Read() != ')')
{
throw new InvalidSystemException("Unclosed pair");
}
return(true);
}
/// <summary>
/// Match one of a set of string options. Will return one of the options or null
/// if there is no match.
/// </summary>
/// <param name="r">Text to parse</param>
/// <param name="options">List of accepted options</param>
/// <returns>Matched string, or null</returns>
private static string Match(SeekableReader r, string[] options)
{
string found = "";
int pos = r.Position;
while (r.Peek() != -1 && IsPrefixIn(found + (char)r.Peek(), options))
{
found += (char)r.Read();
}
if (options.Any(o => found == o))
{
return(found);
}
r.Position = pos;
return(null);
}
public static bool Parse(SeekableReader r, out Star star)
{
string m;
m = Match(r, OTHER_TYPES);
if (m != null)
{
// Brown Dwarf, Black Hole, Unknown
star = new Star();
star.Type = m;
return(true);
}
m = Match(r, STAR_TYPES);
if (m != null)
{
// Regular
star = new Star();
star.Type = m;
if (r.Peek() == ' ')
{
while (r.Peek() == ' ') // w*
{
r.Read();
}
if (Match(r, DWARF_SIZE) == null)
{
throw new InvalidSystemException("Invalid stellar type");
}
star.Tenths = 0;
star.Size = "D";
}
else if (Match(r, DWARF_SIZE) != null)
{
star.Tenths = 0;
star.Size = "D";
}
else
{
m = Match(r, STAR_TENTHS);
if (m == null)
{
throw new InvalidSystemException("Invalid stellar type");
}
star.Tenths = (int)m[0] - (int)'0';
while (r.Peek() == ' ') // w*
{
r.Read();
}
m = Match(r, STAR_SIZES);
if (m == null)
{
throw new InvalidSystemException("Invalid stellar size");
}
star.Size = m;
}
#if EXTENDED_SYSTEM_PARSING
if (r.Peek() == '*')
{
r.Read();
star.Main = true;
}
#endif
return(true);
}
m = Match(r, DWARF_TYPES);
if (m != null)
{
// Dwarf
star = new Star();
star.Type = m;
return(true);
}
star = null;
return(false);
}
public static bool Parse( SeekableReader r, out FarCompanion far )
{
if( r.Peek() != '[' )
{
far = null;
return false;
}
far = new FarCompanion();
r.Read(); // '['
if( !System.Parse(r, out far.Companion) )
throw new InvalidSystemException( "Invalid far companion" );
if( r.Read() != ']' )
throw new InvalidSystemException( "Unclosed far companion" );
return true;
}
public static bool Parse( SeekableReader r, out Pair pair )
{
if( r.Peek() != '(' )
{
pair = null;
return false;
}
pair = new Pair();
r.Read(); // "("
if( !Star.Parse( r, out pair.Star1 ) )
throw new InvalidSystemException( "Invalid star within pair" );
if( r.Peek() != ' ' ) // w+
throw new InvalidSystemException( "Missing whitespace within pair" );
while( r.Peek() == ' ' )
r.Read();
if( !Star.Parse( r, out pair.Star2 ) )
throw new InvalidSystemException( "Invalid star within pair" );
if( r.Read() != ')' )
throw new InvalidSystemException( "Unclosed pair" );
return true;
}
public static bool Parse(SeekableReader r, out System system)
{
Unit u;
if (!Unit.Parse(r, out u))
throw new InvalidSystemException("No core star");
system = new System();
system.Core = u;
while (r.Peek() == ' ')
{
while (r.Peek() == ' ') // w+
r.Read();
Companion companion;
if (!Companion.Parse(r, out companion))
throw new InvalidSystemException("Expected companion");
system.Companions.Add(companion);
}
return true;
}
public static bool Parse(SeekableReader r, out Star star)
{
string m;
m = Match(r, OTHER_TYPES);
if (m != null)
{
// Brown Dwarf, Black Hole, Unknown
star = new Star();
star.Type = m;
return true;
}
m = Match(r, STAR_TYPES);
if (m != null)
{
// Regular
star = new Star();
star.Type = m;
if (r.Peek() == ' ')
{
while (r.Peek() == ' ') // w*
r.Read();
if (Match(r, DWARF_SIZE) == null)
throw new InvalidSystemException("Invalid stellar type");
star.Tenths = 0;
star.Size = "D";
}
else if (Match(r, DWARF_SIZE) != null)
{
star.Tenths = 0;
star.Size = "D";
}
else
{
m = Match(r, STAR_TENTHS);
if (m == null)
throw new InvalidSystemException("Invalid stellar type");
star.Tenths = (int)m[0] - (int)'0';
while (r.Peek() == ' ') // w*
r.Read();
m = Match(r, STAR_SIZES);
if (m == null)
throw new InvalidSystemException("Invalid stellar size");
star.Size = m;
}
#if EXTENDED_SYSTEM_PARSING
if (r.Peek() == '*')
{
r.Read();
star.Main = true;
}
#endif
return true;
}
m = Match(r, DWARF_TYPES);
if (m != null)
{
// Dwarf
star = new Star();
star.Type = m;
return true;
}
star = null;
return false;
}
/// <summary>
/// Match one of a set of string options. Will return one of the options or null
/// if there is no match.
/// </summary>
/// <param name="r">Text to parse</param>
/// <param name="options">List of accepted options</param>
/// <returns>Matched string, or null</returns>
private static string Match(SeekableReader r, string[] options)
{
string found = "";
int pos = r.Position;
while (r.Peek() != -1 && IsPrefixIn(found + (char)r.Peek(), options))
{
found += (char)r.Read();
}
if (options.Any(o => found == o))
return found;
r.Position = pos;
return null;
}