/// <summary>
/// Create a configuration by parsing the given ini lines
/// </summary>
/// <param name="iniLines"></param>
/// <param name="configuration"></param>
/// <returns></returns>
public static bool TryParse(IEnumerable <string> iniLines, out Configuration?configuration)
{
var lines = new List <ConfigurationLine>();
ConfigurationLine? previousLine = null;
ConfigurationSection?currentSection = null;
foreach (var iniLine in iniLines)
{
if (ConfigurationLine.TryPrase(iniLine, previousLine, out var line))
{
if (line != previousLine)
{
line.Index = lines.Count;
lines.Add(line);
previousLine = line;
if (line is ConfigurationSection section)
{
currentSection = section;
}
else if (line is ConfigurationValue value)
{
if (currentSection == null)
{
// Section expected
configuration = null;
return(false);
}
currentSection.Add(value);
}
}
}
else
{
configuration = null;
return(false);
}
}
configuration = new Configuration(lines);
return(true);
}
public static bool TryPrase(string iniLine, ConfigurationLine?previousLine, out ConfigurationLine line)
{
var indentation = "";
var i = 0;
while (i < iniLine.Length && IsWhitespace(iniLine[i]))
{
indentation += iniLine[i];
++i;
}
// Empty or whitespace-only
if (i == iniLine.Length)
{
line = new ConfigurationLine(indentation);
return(true);
}
// Comment
if (iniLine[i] == '#' || iniLine[i] == ';')
{
var delimiter = iniLine[i];
++i;
var leadingWhitespace = "";
while (i < iniLine.Length && IsWhitespace(iniLine[i]))
{
leadingWhitespace += iniLine[i];
++i;
}
var text = iniLine.Substring(i);
line = new ConfigurationComment(indentation, delimiter, leadingWhitespace, text);
return(true);
}
// Section
if (iniLine[i] == '[')
{
var name = "";
++i;
while (i < iniLine.Length && iniLine[i] != ']')
{
name += iniLine[i];
++i;
}
if (iniLine[i] == ']')
{
++i;
var trailingWhitespace = "";
while (i < iniLine.Length && IsWhitespace(iniLine[i]))
{
trailingWhitespace += iniLine[i];
++i;
}
if (i == iniLine.Length)
{
var trimmedName = name.TrimStart();
var nameLeadingWhitespace = name.Substring(0, name.Length - trimmedName.Length);
trimmedName = trimmedName.TrimEnd();
var nameTrailingWhitespace = name.Substring(nameLeadingWhitespace.Length + trimmedName.Length);
line = new ConfigurationSection(indentation, nameLeadingWhitespace, trimmedName, nameTrailingWhitespace, trailingWhitespace);
return(true);
}
}
line = null !;
return(false);
}
// Value
var key = "";
var keyTrailingWhitespace = "";
char keyValueDelimiter = '=';
var delimiterTrailingWhitespace = "";
string?value = null;
var valueTrailingWhitespace = "";
while (i < iniLine.Length && iniLine[i] != ':' && iniLine[i] != '=')
{
key += iniLine[i];
++i;
}
var j = key.Length - 1;
while (j >= 0 && IsWhitespace(key[j]))
{
keyTrailingWhitespace = key[j] + keyTrailingWhitespace;
--j;
}
key = key.Substring(0, j + 1);
if (i < iniLine.Length && (iniLine[i] == ':' || iniLine[i] == '='))
{
if (key.Length == 0)
{
// Expecting key before = or :
line = null !;
return(false);
}
keyValueDelimiter = iniLine[i];
++i;
while (i < iniLine.Length && IsWhitespace(iniLine[i]))
{
delimiterTrailingWhitespace += iniLine[i];
++i;
}
value = iniLine.Substring(i);
j = value.Length - 1;
while (j >= 0 && IsWhitespace(value[j]))
{
valueTrailingWhitespace = value[j] + valueTrailingWhitespace;
--j;
}
value = value.Substring(0, j + 1);
}
else
{
// Blank line
if (key.Length == 0)
{
line = new ConfigurationLine(indentation);
return(true);
}
}
// Check for wrapped lines and unwrap into the previous line's value
if (previousLine is ConfigurationValue previousValueLine)
{
if (indentation.Length > previousValueLine.Indentation.Length)
{
previousValueLine.Value += " " + key;
previousValueLine.ValueTrailingWhitespace = valueTrailingWhitespace;
line = previousValueLine;
return(true);
}
}
line = new ConfigurationValue(indentation, key, keyTrailingWhitespace, keyValueDelimiter, delimiterTrailingWhitespace, value, valueTrailingWhitespace);
return(true);
}