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--[ Issue 7 ]-------------------------------------- G A Z E T T E brought to you by the Chicken Team == 0. Introduction Welcome to issue 7 of the Chicken Gazette, today brought to you by Christian Kellermann. == 1. The Hatching Farm - New Eggs & The Egg Repository Last week has given egg authors a lot to do. The API for using regular expressions in core chicken has been changed to irregex. This fine library by Alex Shinn (http://wiki.call-cc.org/users/alex-shinn) has been at work under the hood for quite a while. The change now incorporates irregex as a regular unit in chicken-core, which has a severe impact on how eggs have to include the irregex symbols for usage. Peter Bex (http://wiki.call-cc.org/users/peter-bex) has written a nice summary on How to use irregex safely & responsibly (http://www.mail-archive.com/chicken-users@nongnu.org/msg12242.html) on chicken-users. Due to this change one could see a spike in eggs failing as the API change has been comitted. Mario Goulart (http://wiki.call-cc.org/users/mario-domenech-goulart), Ivan Raikov (http://wiki.call-cc.org/users/ivan-raikov) and all the other egg authors converted most of the failing eggs to the new API. At the time of writing this 27 eggs (http://tests.call-cc.org/2010/10/11/salmonella-report/) still need your help! Please check the eggs you maintain whether they need care. Peter also has added http-proxy support to http-client (http://wiki.call-cc.org/eggref/4/http-client) and would appreciate testing and feedback on it. Another Peter, Peter Lane (http://wiki.call-cc.org/users/peter-lane) added a wrapper for simple vector machines called libsvm (http://wiki.call-cc.org/eggref/4/libsvm) to our egg pool. He also released another version of leptonica (http://wiki.call-cc.org/eggref/4/leptonica). Thanks Peter(s)! == 2. The Core - Bleeding Edge Development First of all as of October 6th chicken's development branch got a new snapshot: 4.6.3. Thanks to all the contributers that made this possible! >From the NEWS file: * the `regex' library unit has been removed and is separately available as an extension which should be fully backwards- compatible * `irregex' is now a core library unit and replaces the `regex' API * `-frwapv' has been added to the default C compiler options * configuration-header fix for BSD systems (thanks to Peter Bex and Christian Kellermann (http://wiki.call-cc.org/users/christian-kellermann)) * added support for `pointer-vectors' (unit `lolevel'): make-pointer-vector pointer-vector? pointer-vector-length pointer-vector-ref pointer-vector-set! * added new foreign type `poiner-vector' which maps to `void **' * new "implicit renaming" macro facility contributed by Peter Bex (see `ir-macro-transformer') * the warning shown when unimported identifiers are used in compiled modules now also shows the name of the procedure where the identifier is referenced (suggested by Alaric Snell-Pym (http://wiki.call-cc.org/users/alaric-blagrave-snellpym)) * the deprecated `random-seed' function has been removed * parameters are now settable and can be modified using `set!' (SRFI-17) * the impementation of overflow-detection for arithmetic operations on fixnums have been replaced and now allow using the full 63-bit range of fixnums on 64-bit systems * fixed serious inlining-bug (thanks to Sven Hartrumpf (http://wiki.call-cc.org/users/sven-hartrumpf)) The curious and daring adventurers are invited to try and test this developer release as hard as they can. == 3. Chicken Talk This week the chicken-user mailing list has been talking about the necessary steps for egg authors to fix their eggs with the new irregex changes. Daishi Kato (http://wiki.call-cc.org/users/daishi-kato) raised the question on how to handle http multipart/form-data (http://www.mail-archive.com/chicken-users@nongnu.org/msg12203.html) which is still an open path that needs exploring. Peter asked about the right way to install data files along eggs (http://www.mail-archive.com/chicken-users@nongnu.org/msg12208.html). Mario found some inconsistencies in the docs regarding require semantics (http://www.mail-archive.com/chicken-users@nongnu.org/msg12227.html) == 4. Omelette Recipes - Tips and Tricks Today I want to direct your attention to a small egg that may help you in writing nice visualisations: ezxdisp (http://wiki.call-cc.org/egg/ezxdisp). This wraps the small X11 library (http://morihit.net/ezxdisp/) written by n-sibata and Morihiko Tamai. Ezxdisp provides you with easy procedures to draw basic 2d and 3d graphics on your X11 display. On Windows the native API is used. >From a small hello world example (define ezx (ezx-init 100 100 "Hello, ezxdisp")) (ezx-set-background ezx (make-ezx-color 1 1 1)) (ezx-fillcircle-2d ezx 50 50 25 (make-ezx-color 1 0 0)) (ezx-redraw ezx) (let loop () (let-values (((b _ _) (ezx-pushbutton ezx))) (loop))) (ezx-quit ezx) up to a 3d clock (https://anonymous:@code.call-cc.org/svn/chicken-eggs/release/4/ezxdisp/trunk/3d_clock.scm) all is possible. This allows small and fast coding of processing (http://processing.org) like visualisations such as drawing Wolfram's automata (http://pestilenz.org/~ckeen/wolfram/automata.scm). Have fun drawing! == 5. About the Chicken Gazette The Gazette is produced weekly by a volunteer from the Chicken community. The latest issue can be found at http://gazette.call-cc.org or you can follow it in your feed reader at http://gazette.call-cc.org/feed.atom. If you'd like to write an issue, check out the instructions (http://bugs.call-cc.org/browser/gazette/README.txt) and come and find us in #chicken on Freenode! [ --- End of this issue --- ] _______________________________________________ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users