/**
* Encodes @len bytes of data pointed to by @src by base64 encoding.
* Stores them in @dest and returns the number of bytes the output
* takes.
*/
/**
* Encodes @len bytes of data pointed to by @src by base64 encoding.
* Stores them in @dest and returns the number of bytes the output
* takes.
*/
/**
* Decodes @len bytes of data pointed to by @src from base64 encoding.
* All invalid characters are ignored. The result is stored into @dest
* and length of the result is returned.
*/
/**
* Decodes @len bytes of data pointed to by @src from base64 encoding.
* All invalid characters are ignored. The result is stored into @dest
* and length of the result is returned.
*/