ofey404 / getopt-dos

`getopt` function for dos style(start with slash, eg: /x) command line flag parsing.

getopt for dos style command line flags(/x)

Keep the most similarity with standard unix getopt.

Goal:

• flag with no argument, eg: /x
• colon separated argument, eg: /x:10
• space separated argument list, eg: /x arg1 arg2