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-Stability
----------
-* ibex_open should never crash, and should never return NULL without
-errno being set. Should check for errors when reading.
-
-
-Performance
------------
-* Profiling, keep thinking about data structures, etc.
-
-* Check memory usage
-
-* See if writing the "inverse image" of long ref streams helps
-compression without hurting performance now. (ie, if a word appears in
-more than half of the files, write out the list of files it _doesn't_
-appear in). (I tried this before, and it wasn't working well, but the
-file format and data structures have changed a lot.)
-
-* We could save a noticeable chunk of time if normalize_word computed
-the hash of the word and then we could pass that into
-g_hash_table_insert somehow.
-
-* Make a copy of the buffer to be indexed (or provide interface for
-caller to say ibex can munge the provided data) and then use that
-rather than constantly copying things. ?
-
-
-Functionality
--------------
-* ibex file locking
-
-* specify file mode in ibex_open
-
-* ibex_find* need to normalize the search words... should this be done
-by the caller or by ibex_find?
-
-* Needs to be some way to do a secondary search after getting results
-back from ibex_find* (ie, for "foo near bar"). This either has to be
-done by ibex, or requires us to export the normalize interface.
-
-* Does there need to be an ibex_find_any, or is that easy enough for the
-caller to do?
-
-* utf8_trans needs to cover at least two more code pages. This is
-tricky because it's not clear whether some of the letters there should
-be translated to ASCII or left as UTF8. This requires some
-investigation.
-
-* ibex_index_* need to ignore HTML tags.
-  NAME = [A-Za-z][A-Za-z0-9.-]*
-  </?{NAME}(\s*{NAME}(\s*=\s*({NAME}|"[^"]*"|'[^']*')))*>
-  <!(--([^-]*|-[^-])--\s*)*>
-
-  ugh. ok, simplifying, we get:
-  <[^!](([^"'>]*("[^"]*"|'[^']*'))*> or
-  <!(--([^-]*|-[^-])--\s*)*>
-
-  which is still not simple. sigh.
-
-* ibex_index_* need to recognize and ignore "non-text". Particularly
-BinHex and uuencoding.