<div>My Dr Scheme (v299.200, windows XP) stopped working. As soon as I type something on the definitions pane CPU usage goes to 100% and that's all she wrote. I suspect the issue is related to today's Easter egg (is that Eli? is a happy birthday in order?) as it started happening right after it was displayed. </div> <div> </div> <div> </div> <div> </div> <div>-pp</div> <div>  </div> <div>On 8/30/05, <a href="mailto:plt-scheme-request@list.cs.brown.edu">plt-scheme-request@list.cs.brown.edu</a> <<a href="mailto:plt-scheme-request@list.cs.brown.edu"> plt-scheme-request@list.cs.brown.edu</a>> wrote: <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Send plt-scheme mailing list submissions to        <a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu </a> To subscribe or unsubscribe via the World Wide Web, visit        <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> or, via email, send a message with subject or body 'help' to        <a href="mailto:plt-scheme-request@list.cs.brown.edu">plt-scheme-request@list.cs.brown.edu</a> You can reach the person managing the list at        <a href="mailto:plt-scheme-admin@list.cs.brown.edu"> plt-scheme-admin@list.cs.brown.edu</a> When replying, please edit your Subject line so it is more specific than "Re: Contents of plt-scheme digest..." [Please handle PLT Scheme list administrative tasks through the Web:   <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme]">http://list.cs.brown.edu/mailman/listinfo/plt-scheme]</a> Today's Topics:   1. changed policy for native libraries? (David Herman)   2. SXML and JavaScript (Arend P. van der Veen)   3. Re: SXML and JavaScript (David Herman)   4. Re: changed policy for native libraries? (David Herman)   5. Re: changed policy for native libraries? (David Herman)   6. Re: changed policy for native libraries? (Matthew Flatt)   7. Re: changed policy for native libraries? (David Herman)   8. modules, autodoc, and the drscheme multimedia format (Corey Sweeney)   9. Re: modules, autodoc, and the drscheme multimedia format (Matthew Flatt) 10. Announcing DivaScheme: voice-based program editing (Shriram Krishnamurthi) 11. FFI stuff: getting a fileno file descriptor from an input port? (Danny Yoo) 12. Re: FFI stuff: getting a fileno file descriptor from an input port? (Matthew Flatt) --__--__-- Message: 1 To: PLT Scheme <<a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> From: David Herman <<a href="mailto:dherman@ccs.neu.edu">dherman@ccs.neu.edu </a>> Date: Mon, 29 Aug 2005 09:51:44 -0400 Subject: [plt-scheme] changed policy for native libraries? Has the policy changed for when mzscheme loads a native library instead of an .ss file? I've updated to the latest nightly binary and all of a sudden the scheme-pg package won't load the native version of its back-end module. I've made sure the .so file has a newer time- stamp than the .ss file. Help! Thanks, Dave --__--__-- Message: 2 Date: Mon, 29 Aug 2005 10:17:41 -0400 From: "Arend P. van der Veen" <<a href="mailto:apvanderveen@att.net">apvanderveen@att.net</a>> To: PLT Scheme List <<a href="mailto:plt-scheme@list.cs.brown.edu"> plt-scheme@list.cs.brown.edu</a>> Subject: [plt-scheme] SXML and JavaScript Hi, I am trying to use SXML with some javascript code.  The problem that I having is that the <, > ect in javascript are being escape sequenced. For example, (html   (head     (title ,(alist-get 'title properties))     (script (@ (language "Javascript")(type "text/javascript")) " function isblank(s) {   if (s = null) || (s = \"\")     return true;   else {     for (var i=0;i<s.length'i++) {       var c = s.charAt(i);       if ((c ~= ' ') && (c != '\n') && (c != '')) return false;     }   }   return true; } " ))) becomes: <html><head><title>Test</title> <script language="Javascript" type="text/javascript"> function isblank(s) {   if (s = null) || (s = &quot;&quot;)     return true;   else {     for (var i=0;i&lt;s.length'i++) {       var c = s.charAt(i);       if ((c ~= ' ') &amp;&amp; (c != ' ') &amp;&amp; (c != '')) return false;     }   }   return true; } </script></head></html> Any help in how to support this would be great. Thanks, Arend --__--__-- Message: 3 Cc: PLT Scheme List < <a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> From: David Herman <<a href="mailto:dherman@ccs.neu.edu">dherman@ccs.neu.edu</a>> Subject: Re: [plt-scheme] SXML and JavaScript Date: Mon, 29 Aug 2005 10:51:46 -0400 To: "Arend P. van der Veen" <<a href="mailto:apvanderveen@att.net">apvanderveen@att.net</a>> Did you try the standard CDATA trick?     <script type="text/javascript">     // <![CDATA[     function isPositive(n) {         return (n > 0);     }     // ]]>     </script> See also:     <a href="http://javascript.about.com/library/blxhtml.htm"> http://javascript.about.com/library/blxhtml.htm</a> HTH, Dave On Aug 29, 2005, at 10:17 AM, Arend P. van der Veen wrote: > Hi, > > I am trying to use SXML with some javascript code.  The problem > that I having is that the <, > ect in javascript are being escape > sequenced. For example, > > (html >   (head >     (title ,(alist-get 'title properties)) >     (script (@ (language "Javascript")(type "text/javascript")) > " > function isblank(s) { >   if (s = null) || (s = \"\") >     return true; >   else { >     for (var i=0;i<s.length'i++) { >       var c = s.charAt(i); >       if ((c ~= ' ') && (c != '\n') && (c != '')) return false; >     } >   } >   return true; > } > " > ))) > > becomes: > > <html><head><title>Test</title> > <script language="Javascript" type="text/javascript"> > function isblank(s) { >   if (s = null) || (s = &quot;&quot;) >     return true; >   else { >     for (var i=0;i&lt;s.length'i++) { >       var c = s.charAt(i); >       if ((c ~= ' ') &amp;&amp; (c != ' > ') &amp;&amp; (c != '')) return false; >     } >   } >   return true; > } > </script></head></html> > > Any help in how to support this would be great. > > Thanks, > Arend > > >  For list-related administrative tasks: >  <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme </a> > --__--__-- Message: 4 Cc: PLT Scheme <<a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> From: David Herman <<a href="mailto:dherman@ccs.neu.edu"> dherman@ccs.neu.edu</a>> Subject: Re: [plt-scheme] changed policy for native libraries? Date: Mon, 29 Aug 2005 11:02:11 -0400 To: David Herman <<a href="mailto:dherman@ccs.neu.edu">dherman@ccs.neu.edu</a>> I think I got it -- web-server-text3m seems to handle PLTCOLLECTS incorrectly. Dave On Aug 29, 2005, at 9:51 AM, David Herman wrote: > Has the policy changed for when mzscheme loads a native library > instead of an .ss file? I've updated to the latest nightly binary > and all of a sudden the scheme-pg package won't load the native > version of its back-end module. I've made sure the .so file has a > newer time-stamp than the .ss file. > > Help! > > Thanks, > Dave > >  For list-related administrative tasks: >  <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme"> http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> > --__--__-- Message: 5 Cc: PLT Scheme <<a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> From: David Herman < <a href="mailto:dherman@ccs.neu.edu">dherman@ccs.neu.edu</a>> Subject: Re: [plt-scheme] changed policy for native libraries? Date: Mon, 29 Aug 2005 11:10:55 -0400 To: David Herman <<a href="mailto:dherman@ccs.neu.edu"> dherman@ccs.neu.edu</a>> Okay, now I really get it. I see I have to build the native library separately with mzc3m if I want to load it from mzscheme3m or web- server-text3m. Sorry for the flurry of emails. Dave On Aug 29, 2005, at 11:02 AM, David Herman wrote: > I think I got it -- web-server-text3m seems to handle PLTCOLLECTS > incorrectly. > > Dave > > On Aug 29, 2005, at 9:51 AM, David Herman wrote: > > >> Has the policy changed for when mzscheme loads a native library >> instead of an .ss file? I've updated to the latest nightly binary >> and all of a sudden the scheme-pg package won't load the native >> version of its back-end module. I've made sure the .so file has a >> newer time-stamp than the .ss file. >> >> Help! >> >> Thanks, >> Dave >> >>  For list-related administrative tasks: >>  <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> >> >> > > --__--__-- Message: 6 From: Matthew Flatt <<a href="mailto:mflatt@cs.utah.edu">mflatt@cs.utah.edu</a>> To: David Herman <<a href="mailto:dherman@ccs.neu.edu">dherman@ccs.neu.edu</a>> Cc: PLT Scheme <<a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> Subject: Re: [plt-scheme] changed policy for native libraries? Date: Mon, 29 Aug 2005 09:26:03 -0600 At Mon, 29 Aug 2005 11:10:55 -0400, David Herman wrote: > Okay, now I really get it. I see I have to build the native library > separately with mzc3m if I want to load it from mzscheme3m or web- > server-text3m. No, using mzc3m is the same as using mzc. (It just runs the compiler via MzScheme3m instead of MzScheme.) The short answer is that I need to write proper documentation for making extensions compatible with 3m. I will do that soon; let me know if it can't wait a few days. Matthew --__--__-- Message: 7 Cc: PLT Scheme <<a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> From: David Herman <<a href="mailto:dherman@ccs.neu.edu">dherman@ccs.neu.edu </a>> Subject: Re: [plt-scheme] changed policy for native libraries? Date: Mon, 29 Aug 2005 11:29:52 -0400 To: Matthew Flatt <<a href="mailto:mflatt@cs.utah.edu">mflatt@cs.utah.edu</a>> Okay. I just noticed the (system-library-subpath) is different for 3m, which explains why it wasn't noticing the native-compiled library. I'm just going to continue using the imprecise collector for now. I suppose I can wait a few days for the documentation on making 3m- compatible extensions, since I don't really have the time to modify the scheme-pg extension anyway. But if you don't mind, please let me know when you have added that documentation. Thanks, Dave On Aug 29, 2005, at 11:26 AM, Matthew Flatt wrote: > At Mon, 29 Aug 2005 11:10:55 -0400, David Herman wrote: > >> Okay, now I really get it. I see I have to build the native library >> separately with mzc3m if I want to load it from mzscheme3m or web- >> server-text3m. >> > > No, using mzc3m is the same as using mzc. (It just runs the compiler > via MzScheme3m instead of MzScheme.) > > The short answer is that I need to write proper documentation for > making extensions compatible with 3m. I will do that soon; let me know > if it can't wait a few days. > > Matthew > > --__--__-- Message: 8 Date: Mon, 29 Aug 2005 13:30:13 -0500 From: Corey Sweeney <<a href="mailto:corey.sweeney@gmail.com">corey.sweeney@gmail.com</a>> To: PLT Scheme List <<a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> Subject: [plt-scheme] modules, autodoc, and the drscheme multimedia format Does there exist a "autodoc" system for the module system?  Nothing fancy.  I'm not even looking for full prototypes, just the name of the provided functions.  For example, suppose I had the following "thin-client.ss" file: (module thin-client (lib "plt-pretty-big-text.ss" "lang") blah blah blah (provide (all-defined)))          <<then do something like:>> bash $ drdoc thin-client.ss          <<and get something like:>> module name: thin-client procedures:         connect-to-server         =20         disconnect-from-server ------------ or, another option...  Is there a way to access the drscheme multimedia format?  Currently for text .scm files, I wrote a script that greps for defines and ';**' comments at the end of a line which are used to mark a line as important to go in the summary.  But many files in the drscheme multimedia format are inaccessable to me.  I realize that I could export every file to "text format", and then grep through those, but I'm hoping for a automatic process in which with once command i'll be able to generate all my documentation. --- i found "(lookup-documentation module-path-v label-sym)",in the docs, but i can't figure what "label-sym" is supposed to be.  My guess is that it's a user-defined symbol that lets you insert documentation into the middle of the code, and you write a function to extract it and print it as you want.  (which is cool, and i might use in the future).  But I was hoping for auto-extraction of my unmodified sources.   I tried: (provide-and-document (all-defined)), but that didn't work. Is there more info on how to use this?=20 ----- Oh, and if it matters, my modules are actually wrappers. So my thin-client.ss file is actually: (module thin-client (lib "plt-pretty-big-text.ss " "lang") (require (lib "lib-general.ss" "general")) (require (lib "include.ss")) (include "thin.client.scm") (provide (all-defined))) Corey --__--__-- Message: 9 From: Matthew Flatt <<a href="mailto:mflatt@cs.utah.edu">mflatt@cs.utah.edu</a>> To: Corey Sweeney <<a href="mailto:corey.sweeney@gmail.com">corey.sweeney@gmail.com </a>> Cc: PLT Scheme List <<a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a>> Subject: Re: [plt-scheme] modules, autodoc, and the drscheme multimedia format Date: Mon, 29 Aug 2005 14:57:19 -0600 At Mon, 29 Aug 2005 13:30:13 -0500, Corey Sweeney wrote: > or, another option...  Is there a way to access the drscheme > multimedia format?  Currently for text .scm files, I wrote a script > that greps for defines and ';**' comments at the end of a line which > are used to mark a line as important to go in the summary.  But many > files in the drscheme multimedia format are inaccessable to me.  I > realize that I could export every file to "text format", and then grep > through those, but I'm hoping for a automatic process in which with > once command i'll be able to generate all my documentation. For now, you have to load it into a text% and use `open-input-text-editor'. I intend to replace the current binary format with an S-expression format, but I don't have an ETA for that. > i found "(lookup-documentation module-path-v label-sym)",in the docs, > but i can't figure what "label-sym" is supposed to be. It's the `doc-label-id' of `provide-and-document', which is an experimental documentation system that I think doesn't work right. > (provide-and-document >  (all-defined)), but that didn't work. > > Is there more info on how to use this? See the docs for `provide-and-document' (with the caveat that I implemented it and I don't like it). This form has a different syntax than `provide'. Matthew --__--__-- Message: 10 Date: Mon, 29 Aug 2005 20:15:01 -0400 From: Shriram Krishnamurthi <<a href="mailto:shriram@gmail.com">shriram@gmail.com</a>> Reply-To: <a href="mailto:sk@cs.brown.edu"> sk@cs.brown.edu</a> To: <a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a> Subject: [plt-scheme] Announcing DivaScheme: voice-based program editing                              DivaScheme         ...for times when you wish your doctor would listen DivaScheme enhances DrScheme with voice-based program editing. DivaScheme's commands support both the creation of new code and the modification of existing code. DivaScheme introduces a command shell, the Diva Box, that recognizes the system's commands.  These commands can be entered by voice dictation, via keyboard shortcuts, or by typing them in full (as when employing an amanuensis).  Using these commands results in a form of structured program editing.  DivaScheme is sensitive to the current language level and knows the language constructs defined at that level (but only for the Scheme variants).  The current version does not recognize macro-based programmer extensions to the language. DivaScheme does not itself perform voice recognition; we instead expect users to employ their favorite voice recognition system.  We have tested DivaScheme using the commercial Dragon Naturally Speaking package.  We look forward to user feedback on their experiences. You can find the software and installation instructions at <a href="http://www.cs.brown.edu/research/plt/software/divascheme/">http://www.cs.brown.edu/research/plt/software/divascheme/</a> DivaScheme was designed and implemented by Romain Legendre, Guillaume Marceau, Kathi Fisler and Shriram Krishnamurthi.  We thank Jay McCarthy for his help. --__--__-- Message: 11 Date: Mon, 29 Aug 2005 19:08:39 -0700 (PDT) From: Danny Yoo <<a href="mailto:dyoo@hkn.eecs.berkeley.edu"> dyoo@hkn.eecs.berkeley.edu</a>> To: <a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a> Subject: [plt-scheme] FFI stuff: getting a fileno file descriptor from an input port? Hi everyone, I'm starting to play with the foreign function interface; the FFI paper:    <a href="http://repository.readscheme.org/ftp/papers/sw2004/barzilay.pdf">http://repository.readscheme.org/ftp/papers/sw2004/barzilay.pdf </a> mentions an implementation of c-read: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (define c-read (get-ffi-obj "read" "libc.so.6"   (_fun _int      (buf : _string)      (_int : (string-length buf))      -> _int))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; which is lovely.  But, unfortunately, I'm not quite sure how to call this. *grin* Basically, I wanted to do something like:    (c-read (current-input-port) (make-string 20)) but this didn't work, of course: ################################## > (define buf (make-string 20)) > (procedure-arity c-read) > (c-read (current-input-port) buf) Scheme->C: expects argument of type <int32>; given #<input-port:stdin> ################################## The first argument should be a file descriptor integer, but I haven't figured out a clean way to get a file descriptor from a file port. I'm assuming that this is non-obvious because:    <a href="http://list.cs.brown.edu/pipermail/plt-scheme/2003-October/003588.html">http://list.cs.brown.edu/pipermail/plt-scheme/2003-October/003588.html</a> uses "cffi.ss" to call fileno: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (define stdin-fileno (c-lambda () int "___result = fileno(stdin); ")) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; I've been staring at src/mzscheme/src/port.c, and see that it has a FILE* structure, so I'm pretty sure that I can use cffi to access that structure.  But I'm wondering if there's a way to get at the fileno of an arbitrary file input port without having to invoke the compiler: I'd like to avoid cffi if that's possible. The closest I've been able to find in the Mzscheme manual is the function port-file-identity, which isn't quite right, but is close. Thanks for any help! --__--__-- Message: 12 From: Matthew Flatt <<a href="mailto:mflatt@cs.utah.edu">mflatt@cs.utah.edu</a>> To: Danny Yoo <<a href="mailto:dyoo@hkn.eecs.berkeley.edu">dyoo@hkn.eecs.berkeley.edu</a>> Cc: <a href="mailto:plt-scheme@list.cs.brown.edu">plt-scheme@list.cs.brown.edu</a> Subject: Re: [plt-scheme] FFI stuff: getting a fileno file descriptor from an input port? Date: Mon, 29 Aug 2005 20:26:34 -0600 At Mon, 29 Aug 2005 19:08:39 -0700 (PDT), Danny Yoo wrote: > mentions an implementation of c-read: > > ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; > (define c-read >  (get-ffi-obj "read" " libc.so.6" >    (_fun _int >       (buf : _string) >       (_int : (string-length buf)) >       -> _int))) > ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; > [...] > The first argument should be a file descriptor integer, but I haven't > figured out a clean way to get a file descriptor from a file port. [...] > > I've been staring at src/mzscheme/src/port.c, and see that it has a FILE* > structure, so I'm pretty sure that I can use cffi to access that > structure. FILE* ports and file-descriptor ports are different. FILE* ports aren't used unless some extension or embedding program creates them. Extracting the file descriptor for a port is not easy. You'd have to go through the `port_data' field of an import port or output port; it will refer to a Scheme_FD struct, which contains an fd field. The Scheme_FD struct is private to "port.c". If it's useful, we could add a scheme_get_port_file_descriptor() function to MzScheme. You want to do more than just call read() I take it (since MzScheme already provides `read-bytes!')? Matthew End of plt-scheme Digest </blockquote></div>