/// <summary>
/// Creates an array of frames from a string expression. The expression must be similar to the following format:
/// "0,3,7-11,2,5"
/// Whitespace is permitted, and commas are optional.
/// <param name="input">A string formatted as above, describing the frames to generate.</param>
/// </summary>
public static int[] ParseFrames(string input)
{
// Make sure the pattern matches, and alert the user if it doesn't
var parse = SyntaxCheck.Match(input);
if (!parse.Success)
{
throw new Exception(string.Format("Invalid format: {0}", input));
}
// Get all numbers/ranges in the input string.
var frames = new List <int>();
foreach (Match match in GetMatches.Matches(input))
{
var range = GetRange.Match(match.Value);
if (range.Success)
{
int from = int.Parse(range.Groups[1].Value);
int to = int.Parse(range.Groups[2].Value);
// Support ascending and descending ranges
if (from < to)
{
while (from <= to)
{
frames.Add(from++);
}
}
else
{
while (from >= to)
{
frames.Add(from--);
}
}
}
else
{
frames.Add(int.Parse(match.Value));
}
}
return(frames.ToArray());
}
