diff as a library?

[Bruno Haible]

Hi,

It would be useful to have the main functionality of the "diff" program
in a GPLed library. The forthcoming GNU gettext program "msgdiff" needs to
call diff hundreds of times for a given 100 KB input file, and users would
complain that it is slow. It would be faster if msgdiff could use a library,
that returns a list of hunks for two given string arrays passed in memory.
It is irrelevant whether this library is installed as a shared library, or
if its source code is included in gnulib.

Bruno