roy@cs.umn.edu (Roy M. Silvernail) (09/02/90)
Has anyone implemented UUdecode in Perl?
I'm working on a Perl project (targeted at MS-DOS) that will include
UUdecoding files. In the interest of conserving disk overhead, I'd
rather not create a temp file and spawn UUdecode. I'd rather just
accomplish the whole project in Perl. If a Perl UUdecode already has
been written, it would save me re-inventing a wheel.
Just another Perl newbie...
--
Roy M. Silvernail |+| roy%cybrspc@cs.umn.edu |+| #define opinions ALL_MINE;
main(){float x=1;x=x/50;printf("It's only $%.2f, but it's my $%.2f!\n",x,x);}
"This is cyberspace." -- Peter da Silva :--: "...and I like it here!" -- mecomposer@chem.bu.edu (Jeff Kellem) (09/02/90)
In article <VX6uo4w162w@cybrspc> cybrspc!roy@cs.umn.edu (Roy M. Silvernail) writes: > Date: 2 Sep 90 09:09:06 GMT > > Has anyone implemented UUdecode in Perl? As of version 3.0 patchlevel 28 of perl, uu{de,en}coding is builtin to perl via the `pack' and `unpack' functions. Actually, it's in there at patchlevel 27, but pl28 came out quickly afterwards fixing some problems in perl, so you should be at pl28. ;-) Here's a quick example of uudecode in perl using those features. Implementing uuencode would follow along similar lines. As Larry said in the patch comments, it was a "wacked out evening" when he added this feature. :-) Enjoy... -jeff Jeff Kellem Internet: composer@chem.bu.edu p.s. It's just something quickly thrown together.. something can always be done better. #!/usr/bin/perl # # quick uudecode -- no error checking ($version,$patchlevel) = $] =~ /(\d+\.\d+).*\nPatch level: (\d+)/; die "Uu{de,en}coding not builtin to perl till version 3.0 pl27.\n" if $version * 1000 + $patchlevel < 3027; while (<>) { if (/^begin\s(\d+)\s(.*)/) { $file = $2; $mode = "0" . $1; open (INPUT, "> $file") || die "Can't create $file: $!\n"; chmod oct($mode), $file; next; } close (INPUT), next if /^end/; $line = unpack("u",$_); print INPUT $line; }
merlyn@iwarp.intel.com (Randal Schwartz) (09/03/90)
In article <VX6uo4w162w@cybrspc>, cybrspc!roy@cs (Roy M. Silvernail) writes: | Has anyone implemented UUdecode in Perl? | | I'm working on a Perl project (targeted at MS-DOS) that will include | UUdecoding files. In the interest of conserving disk overhead, I'd | rather not create a temp file and spawn UUdecode. I'd rather just | accomplish the whole project in Perl. If a Perl UUdecode already has | been written, it would save me re-inventing a wheel. It's nearly trivial in pl28... (From "the book", written by lwall...) ================================================== snip #!/usr/bin/perl $_ = <> until ($mode,$file) = /^begin\s*(\d*)\s*(\S*)/; open(OUT,"> $file") if $file ne ""; while (<>) { last if /^end/; next if /[a-z]/; next unless int((((ord() - 32) & 077) + 2) / 3) == int(length() / 4); print OUT unpack("u", $_); } chmod oct($mode), $file; ================================================== snip -- /=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\ | on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III | | merlyn@iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn | \=Cute Quote: "Welcome to Portland, Oregon, home of the California Raisins!"=/
roy@cs.umn.edu (Roy M. Silvernail) (09/03/90)
composer@chem.bu.edu (Jeff Kellem) writes: > In article <VX6uo4w162w@cybrspc> > cybrspc!roy@cs.umn.edu (Roy M. Silvernail) writes: > > Has anyone implemented UUdecode in Perl? > > As of version 3.0 patchlevel 28 of perl, uu{de,en}coding is builtin to perl > via the `pack' and `unpack' functions. That'll be great when I can get up to pl28. Currently, I'm stuck at pl18 with the MS-DOS version. I guess the next question is... has anyone built the MS-DOS port to pl28? Thanks for the reply, Jeff. -- Roy M. Silvernail |+| roy%cybrspc@cs.umn.edu |+| #define opinions ALL_MINE; main(){float x=1;x=x/50;printf("It's only $%.2f, but it's my $%.2f!\n",x,x);} "This is cyberspace." -- Peter da Silva :--: "...and I like it here!" -- me
phil@ux1.cso.uiuc.edu (09/04/90)
First of I want to get the clerical details out of the way: > Roy M. Silvernail |+| roy%cybrspc@cs.umn.edu |+| #define opinions ALL_MINE; ----> ^^^^^^^^^^^^^^^^^^^^^^ > main(){float x=1;x=x/50;printf("It's only $%.2f, but it's my $%.2f!\n",x,x);} > "This is cyberspace." -- Peter da Silva :--: "...and I like it here!" -- me ) From MAILER-DAEMON@cs.umn.edu Mon Sep 3 12:48:54 1990 ) Received: from cs.umn.edu by ux1.cso.uiuc.edu with SMTP id AA23861 ) (5.64+/IDA-1.3.4 for phil); Mon, 3 Sep 90 12:48:51 -0500 ) Received: from ux1.cso.uiuc.edu by cs.umn.edu (5.59/1.14) ) id AA27209; Mon, 3 Sep 90 12:48:29 CDT ) Date: Mon, 3 Sep 90 12:48:29 CDT ) From: "Mail Delivery Subsystem" <MAILER-DAEMON@cs.umn.edu> ----> ^^^^^^^^^^^^^^^^^^^^^^^^ ) Subject: Returned mail: Host unknown ) Message-Id: <9009031748.AA27209@cs.umn.edu> ) To: <phil@ux1.cso.uiuc.edu> ) Status: R ) ) ----- Transcript of session follows ----- ) 550 <roy%cybrspc@cs.umn.edu>... Host unknown ----> ^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^ And now to the original message: ) ----- Unsent message follows ----- ) Received: from ux1.cso.uiuc.edu by cs.umn.edu (5.59/1.14) ) id AA27201; Mon, 3 Sep 90 12:48:29 CDT ) Received: by ux1.cso.uiuc.edu id AA23837 ) (5.64+/IDA-1.3.4 for roy%cybrspc@cs.umn.edu); Mon, 3 Sep 90 12:48:33 -0500 ) Date: Mon, 3 Sep 90 12:48:33 -0500 ) From: Phil Howard KA9WGN <phil@ux1.cso.uiuc.edu> ) Message-Id: <9009031748.AA23837@ux1.cso.uiuc.edu> ) To: roy%cybrspc@cs.umn.edu ) ) I guess you are one of those people I cannot just do a reply to from news ) since "cyprspc" is not known to uucp, but at least you give a signature. ) ) > Has anyone implemented UUdecode in Perl? ) > ) > I'm working on a Perl project (targeted at MS-DOS) that will include ) > UUdecoding files. In the interest of conserving disk overhead, I'd ) > rather not create a temp file and spawn UUdecode. I'd rather just ) > accomplish the whole project in Perl. If a Perl UUdecode already has ) > been written, it would save me re-inventing a wheel. ) > ) > Just another Perl newbie... ) ) While you are at it, I'd like to encourage you to include the capability ) to encode and decode the XXencode format as well. XX is an alternative ) to UU that uses a different character set that does not run into the ) ambiguities of translation between IBM's EBCDIC character set and ASCII. ) XXencode works where UUencode does (requiring and XXdecoder of course) ) but also works in (non-UNIX) places that UU won't. ) ) XX uses the following character set: ) ) +-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ) ) representing the binary values from 0 to 63 in that order. By using ) a string index you can convert a 6 bit value to a character. My C ) implementation built an array of 256 bytes indexed by the arriving ) character for the decoding process. All the rest of the format is ) identical to the UUencode format. ) ) UUencode won't go away, but XXencode is starting to see some uses ) among those in, or exchanging data with, IBM mainframes. ) ) Various sources are available on: ) wuarchive.wustl.edu: (various paths) ) ux1.cso.uiuc.edu:unix/xxcp (these are the originals) )
flee@guardian.cs.psu.edu (Felix Lee) (09/04/90)
Gak. I hadn't looked at pl28 yet. Why uuencode? Why not btoa, compress, rad-50, snefru, and morse code? And how about the %r roman numeral conversion for printf? -- Felix Lee flee@cs.psu.edu
lwall@jpl-devvax.JPL.NASA.GOV (Larry Wall) (09/04/90)
In article <1043800001@ux1.cso.uiuc.edu> phil@ux1.cso.uiuc.edu writes:
: ) While you are at it, I'd like to encourage you to include the capability
: ) to encode and decode the XXencode format as well. XX is an alternative
: ) to UU that uses a different character set that does not run into the
: ) ambiguities of translation between IBM's EBCDIC character set and ASCII.
: ) XXencode works where UUencode does (requiring and XXdecoder of course)
: ) but also works in (non-UNIX) places that UU won't.
: )
: ) XX uses the following character set:
: )
: ) +-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
: )
: ) representing the binary values from 0 to 63 in that order. By using
: ) a string index you can convert a 6 bit value to a character. My C
: ) implementation built an array of 256 bytes indexed by the arriving
: ) character for the decoding process. All the rest of the format is
: ) identical to the UUencode format.
: )
: ) UUencode won't go away, but XXencode is starting to see some uses
: ) among those in, or exchanging data with, IBM mainframes.
tr/-+0-9A-Za-z/! "-_/;
Sheesh.
Larry