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+#
+# $Id: UCDATAREADME.txt,v 1.1 1999/01/08 00:19:20 ftang%netscape.com Exp $
+#
+
+                           MUTT UCData Package 1.9
+                           -----------------------
+
+This is a package that supports ctype-like operations for Unicode UCS-2 text
+(and surrogates), case mapping, and decomposition lookup.  To use it, you will
+need to get the "UnicodeData-2.0.14.txt" (or later) file from the Unicode Web
+or FTP site.
+
+This package consists of two parts:
+
+  1. A program called "ucgendat" which generates five data files from the
+     UnicodeData-2.*.txt file.  The files are:
+
+     A. case.dat   - the case mappings.
+     B. ctype.dat  - the character property tables.
+     C. decomp.dat - the character decompositions.
+     D. cmbcl.dat  - the non-zero combining classes.
+     E. num.dat    - the codes representing numbers.
+
+  2. The "ucdata.[ch]" files which implement the functions needed to
+     check to see if a character matches groups of properties, to map between
+     upper, lower, and title case, to look up the decomposition of a
+     character, look up the combining class of a character, and get the number
+     value of a character.
+
+A short reference to the functions available is in the "api.txt" file.
+
+Techie Details
+==============
+
+The "ucgendat" program parses files from the command line which are all in the
+Unicode Character Database (UCDB) format.  An additional properties file,
+"MUTTUCData.txt", provides some extra properties for some characters.
+
+The program looks for the two character properties fields (2 and 4), the
+combining class field (3), the decomposition field (5), the numeric value
+field (8), and the case mapping fields (12, 13, and 14).  The decompositions
+are recursively expanded before being written out.
+
+The decomposition table contains all the canonical decompositions.  This means
+all decompositions that do not have tags such as "<compat>" or "<font>".
+
+The data is almost all stored as unsigned longs (32-bits assumed) and the
+routines that load the data take care of endian swaps when necessary.  This
+also means that surrogates (>= 0x10000) can be placed in the data files the
+"ucgendat" program parses.
+
+The data is written as external files and broken into five parts so it can be
+selectively updated at runtime if necessary.
+
+The data files currently generated from the "ucgendat" program total about 56K
+in size all together.
+
+The format of the binary data files is documented in the "format.txt" file.
+
+Mark Leisher <mleisher@crl.nmsu.edu>
+13 December 1998
+
+CHANGES
+=======
+
+Version 1.9
+-----------
+1. Fixed a problem with an incorrect amount of storage being allocated for the
+   combining class nodes.
+
+2. Fixed an invalid initialization in the number code.
+
+3. Changed the Java template file formatting a bit.
+
+4. Added tables and function for getting decompositions in the Java class.
+
+Version 1.8
+-----------
+1. Fixed a problem with adding certain ranges.
+
+2. Added two more macros for testing for identifiers.
+
+3. Tested with the UnicodeData-2.1.5.txt file.
+
+Version 1.7
+-----------
+1. Fixed a problem with looking up decompositions in "ucgendat."
+
+Version 1.6
+-----------
+1. Added two new properties introduced with UnicodeData-2.1.4.txt.
+
+2. Changed the "ucgendat.c" program a little to automatically align the
+   property data on a 4-byte boundary when new properties are added.
+
+3. Changed the "ucgendat.c" programs to only generate canonical
+   decompositions.
+
+4. Added two new macros ucisinitialpunct() and ucisfinalpunct() to check for
+   initial and final punctuation characters.
+
+5. Minor additions and changes to the documentation.
+
+Version 1.5
+-----------
+1. Changed all file open calls to include binary mode with "b" for DOS/WIN
+   platforms.
+
+2. Wrapped the unistd.h include so it won't be included when compiled under
+   Win32.
+
+3. Fixed a bad range check for hex digits in ucgendat.c.
+
+4. Fixed a bad endian swap for combining classes.
+
+5. Added code to make a number table and associated lookup functions.
+   Functions added are ucnumber(), ucdigit(), and ucgetnumber().  The last
+   function is to maintain compatibility with John Cowan's "uctype" package.
+
+Version 1.4
+-----------
+1. Fixed a bug with adding a range.
+
+2. Fixed a bug with inserting a range in order.
+
+3. Fixed incorrectly specified ucisdefined() and ucisundefined() macros.
+
+4. Added the missing unload for the combining class data.
+
+5. Fixed a bad macro placement in ucisweak().
+
+Version 1.3
+-----------
+1. Bug with case mapping calculations fixed.
+
+2. Bug with empty character property entries fixed.
+
+3. Bug with incorrect type in the combining class lookup fixed.
+
+4. Some corrections done to api.txt.
+
+5. Bug in certain character property lookups fixed.
+
+6. Added a character property table that records the defined characters.
+
+7. Replaced ucisunknown() with ucisdefined() and ucisundefined().
+
+Version 1.2
+-----------
+1. Added code to ucgendat to generate a combining class table.
+
+2. Fixed an endian problem with the byte count of decompositions.
+
+3. Fixed some minor problems in the "format.txt" file.
+
+4. Removed some bogus "Ss" values from MUTTUCData.txt file.
+
+5. Added API function to get combining class.
+
+6. Changed the open mode to "rb" so binary data files will be opened correctly
+   on DOS/WIN as well as other platforms.
+
+7. Added the "api.txt" file.
+
+Version 1.1
+-----------
+1. Added ucisxdigit() which I overlooked.
+
+2. Added UC_LT to the ucisalpha() macro which I overlooked.
+
+3. Change uciscntrl() to include UC_CF.
+
+4. Added ucisocntrl() and ucfntcntrl() macros.
+
+5. Added a ucisblank() which I overlooked.
+
+6. Added missing properties to ucissymbol() and ucisnumber().
+
+7. Added ucisgraph() and ucisprint().
+
+8. Changed the "Mr" property to "Sy" to mark this subset of mirroring
+   characters as symmetric to avoid trampling the Unicode/ISO10646 sense of
+   mirroring.
+
+9. Added another property called "Ss" which includes control characters
+   traditionally seen as spaces in the isspace() macro.
+
+10. Added a bunch of macros to be API compatible with John Cowan's package.
+
+ACKNOWLEDGEMENTS
+================
+
+Thanks go to John Cowan <cowan@locke.ccil.org> for pointing out lots of
+missing things and giving me stuff, particularly a bunch of new macros.
+
+Thanks go to Bob Verbrugge <bob_verbrugge@nl.compuware.com> for pointing out
+various bugs.
+
+Thanks go to Christophe Pierret <cpierret@businessobjects.com> for pointing
+out that file modes need to have "b" for DOS/WIN machines, pointing out
+unistd.h is not a Win 32 header, and pointing out a problem with ucisalnum().
+
+Thanks go to Kent Johnson <kent@pondview.mv.com> for finding a bug that caused
+incomplete decompositions to be generated by the "ucgendat" program.
+
+Thanks go to Valeriy E. Ushakov <uwe@ptc.spbu.ru> for spotting an allocation
+error and an initialization error.