Function match_optname

src/options.c:6759–6770

check whether a user-supplied option string is a proper leading substring of a particular option name; option string might have a colon or equals sign and arbitrary value appended to it */

   substring of a particular option name; option string might have
   a colon or equals sign and arbitrary value appended to it */
boolean
match_optname(const char *user_string, const char *optn_name,
              int min_length, boolean val_allowed)
{
    int len = (int) strlen(user_string);

    if (val_allowed)
        len = length_without_val(user_string, len);

    return (boolean) (len >= min_length
                      && !strncmpi(optn_name, user_string, len));
}

void
reset_duplicate_opt_detection(void)