+char *quotearg_n_style PARAMS ((int n, enum quoting_style s, char const *arg));
+
+/* Use style S and storage slot N to return a quoted version of the
+ argument ARG of size ARGSIZE. This is like quotearg_n_style
+ (N, S, ARG), except it can quote null bytes. */
+char *quotearg_n_style_mem PARAMS ((int n, enum quoting_style s,
+ char const *arg, size_t argsize));