libmime is a MIME parser in the same vein as Expat, the stream-oriented
XML parser. As input is fed to the parser, events are generated which an
application can catch by registering event handlers. Such events include
the Unix From_ line, start of entity, end of entity, entity boundary,
header, end of headers, and body. libmime supports MIME message editing
through a delta mechanism. Edit contexts are instantiated and changes
applied to specific contexts. Edit contexts can then be expressed in
standard unified diff format which, when applied to the input source
stream, will result in the new message.
