author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 18 Aug 2010 11:27:44 +0300 | |
changeset 52 | bf6a71c50e42 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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This is an epoc port of zlib (http://www.cdrom.com/pub/infozip/zlib/) |
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Changes made in getting zlib lib to compile. |
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General Changes: |
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All .c files renamed to .cpp |
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K&R function defintions are rewritten to conform with ansi C. |
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ZLib.h: |
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Since all our files are going to be .cpp files we don't need the extern c stuff so thats been commented out. |
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At the start of zlib.h, the macros ZEXPORT, ZEXPORTVA are set to nothing. ZEXTERN is set to IMPORT_C. |
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At the end of zlib.h ZEXTERN is set to nothing. This is nasty and hacky but it involes the least |
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amount of changes to the zlib code. Anyway it can go if we decide not to export to c interface. |
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Every exported function has had EXPORT_C appended to its definition. This affects many files. Again |
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if we decide not to export the c interface these changes can be reversed. |
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ZUtil.h: |
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Includes <e32std.h> at the top. |
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Commented out bit of code which checks moew msvc and messes redefines fdopen as _fdopen. Lines 139 |
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deflate.h: |
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Added a STATIC_CAST to first two lines of _tr_tally_dist |
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delate.cpp: |
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#included <e32def.h> |
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Altered C style casts in INSERT_STRING macro to STATIC_CAST and added some more casts |
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Lines 1041 & 1211 commented out. They contained trhe name of a macro in a piece of code which was |
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#defed out of the compliation process. Unforntately makmake didn't like it. |
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MSDOS & MACOS? specific stuff has been commented out. I guess this should be replace with an appropriate |
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#ifdef but I'm not sure what this should be yet. |
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Added line 284 |
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s->status = INIT_STATE; |
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to fix zlib bug where a memory leak can occur when zalloc fails |
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infblock.cpp |
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This file has been modified to fix a bug in zlib 1.1.3 which can cause a crash when ZALLOC fails. |
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Essentially what happens is that in certain circumstances s->sub.trees.blens can be deleted twice. |
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I have altered infblock.cpp with a patch sent to me by jloup@gzip.org which fixes this problem. I guess |
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this fix will appear in zlib 1.1.4. |
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trees.h: |
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The array sizes specified for _dist_code & _length_code have been removed from the square brackets as |
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it conflicts with another extern definition which appears elsewhere in the code. |
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trees.cpp: |
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#included <e32def.h> |
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STATIC_CASTS added on lines 594, 607, 679, 730, 225 |
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inftrees.cpp: |
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commented out unused formal parameter z in inflate_trees_fixed at line 399. Seems to be some global |
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data in here. Something is going to have to be done about it. |
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gzio.cpp: |
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Swapped around includes for zconf.h and stdio.h so we don't get warnings about multiple defintions of |
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NULL. |
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gzprintf uses to much stack for epoc. Compliation gives a failure to link with _chkstk. Rather than |
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reducing the size of the buffer, I'm going to allocate the buffer on the heap. |
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zconf.h |
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Commented out lines that include unistd.h |
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Global Variables: |
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Since EPOC cannot support writeable global data some modifications were required to the global variables |
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in zlib. Conveniently, however, all of the global variables which were no const did not need to be so |
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and I believe their non const status was dues to backward compatibility with older compilers. The |
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following global variables were made read only to facilitate a marm build. |
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inftrees.cpp: |
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fixed_td |
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table |
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delateInit2::my_version |
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Changes made to remove dependency on the c standard library. |
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the following macros are redefined to make use of the Epoc32 Mem class, zmemcpy, zmemcmp, |
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zmemzero. |
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zcalloc and zfree now call memory functions defined in User. |
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