int firestring_estr_xml_decode(struct firestring_estr_t *destination, struct firestring_estr_t *source)
firestring_estr_xml_decode() decodes the contents of
by converting XML entities back into their ASCII/ISO equivalents. It places the
provided that there is room in
The minimum required space in destination is the length of source; in fact, they
can be the same estring.
0 if the string was decoded successfully; 1 if there was insufficient space in
for the decoding to occur.