func WFNize()

in wfn/wfn.go [104:130]

• 23 lines of code
• 14 McCabe index (conditional complexity)

func WFNize(s string) (string, error) {
	const allowedPunct = "-!\"#$%&'()+,./:;<=>@[]^`{|}!~"
	// replace spaces with underscores
	in := strings.Replace(s, " ", "_", -1)
	buf := make([]byte, 0, len(in))
	// remove illegal characters
	for n, c := range in {
		c := byte(c)
		if c >= 'A' && c <= 'Z' ||
			c >= 'a' && c <= 'z' ||
			c >= '0' && c <= '9' ||
			c == '_' ||
			strings.IndexByte(allowedPunct, c) != -1 {
			buf = append(buf, c)
		}
		// handle wildcard characters
		if c == '*' || c == '?' {
			if n == 0 || in[n-1] != '\\' {
				buf = append(buf, '\\')
			}
			buf = append(buf, c)
		}
	}
	// quote everything that requires quoting
	s, _, err := addSlashesAt(string(buf), 0)
	return s, err
}