--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/compressionlibs/ziplib/test/oldezlib/EZLib/README.txt	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,137 @@
+This is an epoc port of zlib (http://www.cdrom.com/pub/infozip/zlib/)
+
+Changes made in getting zlib lib to compile.
+
+General Changes:
+------------------
+
+All .c files renamed to .cpp
+
+K&R function defintions are rewritten to conform with ansi C.
+
+
+
+ZLib.h:
+---------
+Since all our files are going to be .cpp files we don't need the extern c stuff so thats been commented out.
+At the start of zlib.h, the macros ZEXPORT, ZEXPORTVA are set to nothing.  ZEXTERN is set to IMPORT_C.
+At the end of zlib.h ZEXTERN is set to nothing.  This is nasty and hacky but it involes the least
+amount of changes to the zlib code.  Anyway it can go if we decide not to export to c interface.
+Every exported function has had EXPORT_C appended to its definition.  This affects many files.  Again
+if we decide not to export the c interface these changes can be reversed.
+
+
+ZUtil.h:
+-----------
+Includes <e32std.h> at the top.
+Commented out bit of code which checks moew msvc and messes redefines fdopen as _fdopen.  Lines 139
+
+
+
+deflate.h:
+------------
+
+Added a STATIC_CAST to first two lines of _tr_tally_dist
+
+delate.cpp:
+----------
+
+#included <e32def.h>
+
+Altered C style casts in INSERT_STRING macro to STATIC_CAST and added some more casts
+
+Lines 1041 & 1211 commented out.  They contained trhe name of a macro in a piece of code which was
+#defed out of the compliation process.  Unforntately makmake didn't like it.
+
+MSDOS & MACOS? specific stuff has been commented out.  I guess this should be replace with an appropriate
+#ifdef but I'm not sure what this should be yet.
+
+Added line 284 
+s->status = INIT_STATE;
+to fix zlib bug where a memory leak can occur when zalloc fails
+
+
+infblock.cpp
+-------------
+
+This file has been modified to fix a bug in zlib 1.1.3 which can cause a crash when ZALLOC fails.
+Essentially what happens is that in certain circumstances s->sub.trees.blens can be deleted twice.
+I have altered infblock.cpp with a patch sent to me by jloup@gzip.org which fixes this problem.  I guess
+this fix will appear in zlib 1.1.4.
+
+trees.h:
+----------
+The array sizes specified for _dist_code & _length_code have been removed from the square brackets as
+it conflicts with another extern definition which appears elsewhere in the code.
+
+trees.cpp:
+------------
+
+#included <e32def.h>
+
+STATIC_CASTS added on lines 594, 607, 679, 730, 225
+
+
+inftrees.cpp:
+--------------
+commented out unused formal parameter z in inflate_trees_fixed at line 399.  Seems to be some global
+data in here.  Something is going to have to be done about it.
+
+
+gzio.cpp:
+----------
+Swapped around includes for zconf.h and stdio.h so we don't get warnings about multiple defintions of 
+NULL.
+gzprintf uses to much stack for epoc.  Compliation gives a failure to link with _chkstk.  Rather than 
+reducing the size of the buffer, I'm going to allocate the buffer on the heap.
+
+
+zconf.h
+-----------
+Commented out lines that include unistd.h
+
+Global Variables:
+-------------------
+Since EPOC cannot support writeable global data some modifications were required to the global variables
+in zlib.  Conveniently, however, all of the global variables which were no const did not need to be so
+and I believe their non const status was dues to backward compatibility with older compilers.  The 
+following global variables were made read only to facilitate a marm build.
+
+inftrees.cpp:
+-------------
+
+fixed_td
+fixed_tl
+inflate_mask
+
+trees.cpp:
+----------
+
+static_bl_desc
+static_d_desc
+static_l_desc
+table	
+z_verbose	
+
+
+deflate.cpp:
+-------------
+delateInit2::my_version
+
+
+Changes made to remove dependency on the c standard library.
+-------------------------------------------------------------
+
+zutil.h 
+----------
+the following macros are redefined to make use of the Epoc32 Mem class, zmemcpy, zmemcmp,
+zmemzero.
+
+zutil.cpp
+----------
+zcalloc and zfree now call memory functions defined in User.
+
+
+
+
+