public static long GetOptionLong(this Ast.OptionsList optionsList, string name, ScriptRunner runner,
ScriptEnv env, long defaultValue, long?minValue = null, long?maxValue = null)
{
var num = optionsList.GetOption <long>(name, runner, env, defaultValue);
bool outOfRange =
(minValue.HasValue && num < minValue.Value) ||
(maxValue.HasValue && num > maxValue.Value);
if (outOfRange)
{
if (minValue.HasValue && !maxValue.HasValue)
{
throw new Exception($"{name} must be an integer ≥ {minValue.Value}.");
}
else if (minValue.HasValue && maxValue.HasValue)
{
throw new Exception($"{name} must be an integer between {minValue.Value} and {maxValue.Value}.");
}
else if (!minValue.HasValue && maxValue.HasValue)
{
throw new Exception($"{name} must be an integer ≤ {maxValue.Value}.");
}
}
return(num);
}
public static IEnumerable <string> GetOptionKeys(this Ast.OptionsList optionsList)
{
if (optionsList != null)
{
return(optionsList.Options.Keys.Select(x => x.ToUpper()));
}
else
{
return(new string[0]);
}
}
public static T GetOption <T>(this Ast.OptionsList optionsList, string name, ScriptRunner runner, ScriptEnv env,
T defaultValue)
{
Ast.Expr valueExpr;
if (optionsList != null && optionsList.Options.TryGetValue(name.ToLower(), out valueExpr))
{
return(runner.EvaluateExpr <T>(valueExpr, env));
}
else
{
return(defaultValue);
}
}
public static bool GetOptionBool(this Ast.OptionsList optionsList, string name, ScriptRunner runner,
ScriptEnv env, bool defaultValue)
{
long num = optionsList.GetOption <long>(name, runner, env, defaultValue ? 1 : 0);
if (num != 0 && num != 1)
{
throw new Exception($"{name} must be 0 or 1.");
}
else
{
return(num == 1);
}
}
public static int GetOptionInt(this Ast.OptionsList optionsList, string name, ScriptRunner runner,
ScriptEnv env, int defaultValue, int?minValue = null, int?maxValue = null)
{
var longValue = GetOptionLong(optionsList, name, runner, env, defaultValue, minValue, maxValue);
if (longValue < int.MinValue || longValue > int.MaxValue)
{
throw new Exception($"{name} must be a 32-bit integer.");
}
else
{
return((int)longValue);
}
}
private Ast.OptionsList ParseOptionsList(TokenQueue q) // or null
{
var n = new Ast.OptionsList {
SourceToken = q.SourceToken
};
if (!q.TakeMaybe("("))
{
return(null);
}
do
{
var key = Check(q, ParseIdentifier(q)).ToLower();
q.Take(":");
var value = ParseExpr(q);
n.Options[key] = value;
} while (q.TakeMaybe(","));
q.Take(")");
return(n);
}
public static Encoding GetOptionEncoding(this Ast.OptionsList optionsList, string name, ScriptRunner runner,
ScriptEnv env)
{
var encodingNum = optionsList.GetOptionInt(name, runner, env, 0);
if (encodingNum == 0)
{
return(null);
}
else if (encodingNum < 0 || encodingNum > 65535)
{
throw new Exception($"{name} must be between 0 and 65535.");
}
else
{
Encoding encoding = null;
try {
encoding = Encoding.GetEncoding(encodingNum);
} catch (ArgumentOutOfRangeException) {
// invalid codepage
} catch (ArgumentException) {
// invalid codepage
} catch (NotSupportedException) {
// invalid codepage
}
if (encoding == null)
{
throw new Exception($"The code page {encodingNum} is invalid or is not supported on this system.");
}
else
{
return(encoding);
}
}
}