int firestring_estr_base64_decode(struct firestring_estr_t *destination, struct firestring_estr_t *source)
firestring_estr_base64_decode() decodes the contents of
using the base64 algorithm into
provided that there is room in
The minimum required space in destination is the length of source * 3 / 4 + 3. The buffers
may be the same estring.
0 if the string was decoded successfully; 1 if there was insufficient space in
for the decoding to occur.