Function dr_get_token 

pub unsafe extern "C" fn dr_get_token(
    str_: *const c_char,
    buf: *mut c_char,
    buflen: usize,
) -> *const c_char

Utility function that aids in tokenizing a string, such as a client options string from dr_get_options(). The function scans \p str until a non-whitespace character is found. It then starts copying into \p buf until a whitespace character is found denoting the end of the token. If the token begins with a quote, the token continues (including across whitespace) until the matching end quote is found. Characters considered whitespace are ’ ’, ‘\t’, ‘\r’, and ‘\n’; characters considered quotes are ‘\’’, ‘\“’, and ‘`’.

@param[in] str The start of the string containing the next token. @param[out] buf A buffer to store a null-terminated copy of the next token. @param[in] buflen The capacity of the buffer, in characters. If the token is too large to fit, it will be truncated and null-terminated.

\return a pointer to the end of the token in \p str. Thus, to retrieve the subsequent token, call this routine again with the prior return value as the new value of \p str. Returns NULL when the end of \p str is reached.