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patch suggested by Clinton Pierce <cpierce1@ford.com>)
p4raw-id: //depot/perl@3759
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CORE LANGUAGE CHANGES
Subject: Bitwise op sign rationalization
From: Chip Salzenberg <chip@atlantic.net>
Files: op.c opcode.pl pod/perlop.pod pod/perltoc.pod pp.c pp.h pp_hot.c proto.h sv.c t/op/bop.t
Make bitwise ops result in unsigned values, unless C<use
integer> is in effect. Includes initial support for UVs.
Subject: Defined scoping for C<my> in control structures
From: Chip Salzenberg <chip@atlantic.net>
Files: op.c perly.c perly.c.diff perly.h perly.y proto.h toke.c
Finally defines semantics of "my" in control expressions,
like the condition of "if" and "while". In all cases, scope
of a "my" var extends to the end of the entire control
structure. Also adds new construct "for my", which
automatically declares the control variable "my" and limits
its scope to the loop.
Subject: Fix ++/-- after int conversion (e.g. 'printf "%d"')
From: Chip Salzenberg <chip@atlantic.net>
Files: pp.c pp_hot.c sv.c
This patch makes Perl correctly ignore SvIVX() if either
NOK or POK is true, since SvIVX() may be a truncated or
overflowed version of the real value.
Subject: Make code match Camel II re: functions that use $_
From: Paul Marquess <pmarquess@bfsec.bt.co.uk>
Files: opcode.pl
Subject: Provide scalar context on left side of "->"
From: Chip Salzenberg <chip@atlantic.net>
Files: perly.c perly.y
Subject: Quote bearword package/handle FOO in "funcname FOO => 'bar'"
From: Chip Salzenberg <chip@atlantic.net>
Files: toke.c
OTHER CORE CHANGES
Subject: Warn on overflow of octal and hex integers
From: Chip Salzenberg <chip@atlantic.net>
Files: proto.h toke.c util.c
Subject: If -w active, warn for commas and hashes ('#') in qw()
From: Chip Salzenberg <chip@atlantic.net>
Files: toke.c
Subject: Fixes for pack('w')
From: Ulrich Pfeifer <pfeifer@charly.informatik.uni-dortmund.de>
Files: pp.c t/op/pack.t
Subject: More complete output from sv_dump()
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: sv.c
Subject: Major '..' and debugger patches
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Files: lib/perl5db.pl op.c pp_ctl.c scope.c scope.h
Subject: Fix for formline()
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: global.sym mg.c perl.h pod/perldiag.pod pp_ctl.c proto.h sv.c t/op/write.t
Subject: Fix stack botch in untie and binmode
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: pp_sys.c
Subject: Complete EMBED, including symbols from interp.sym
From: Chip Salzenberg <chip@atlantic.net>
Files: MANIFEST embed.pl ext/DynaLoader/dlutils.c ext/SDBM_File/sdbm/sdbm.h global.sym handy.h malloc.c perl.h pp_sys.c proto.h regexec.c toke.c util.c x2p/Makefile.SH x2p/a2p.h x2p/handy.h x2p/util.h
New define EMBEDMYMALLOC makes embedding total by
avoiding "Mymalloc" etc.
Subject: Support old embedding for people who want it
From: Chip Salzenberg <chip@atlantic.net>
Files: MANIFEST Makefile.SH old_embed.pl old_global.sym
PORTABILITY
Subject: Miscellaneous VMS fixes
From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>
Files: lib/ExtUtils/Liblist.pm lib/ExtUtils/MM_VMS.pm lib/Math/Complex.pm lib/Time/Local.pm lib/timelocal.pl perl.h perl_exp.SH proto.h t/TEST t/io/read.t t/lib/findbin.t t/lib/getopt.t util.c utils/h2xs.PL vms/Makefile vms/config.vms vms/descrip.mms vms/ext/Stdio/Stdio.pm vms/ext/Stdio/Stdio.xs vms/perlvms.pod vms/test.com vms/vms.c
Subject: DJGPP patches (MS-DOS)
From: "Douglas E. Wegscheid" <wegscd@whirlpool.com>
Files: doio.c dosish.h ext/SDBM_File/sdbm/sdbm.c handy.h lib/AutoSplit.pm lib/Cwd.pm lib/File/Find.pm malloc.c perl.c perl.h pp_sys.c proto.h sv.c util.c
Subject: Patch to make Perl work under AmigaOS
From: "Norbert Pueschel" <pueschel@imsdd.meb.uni-bonn.de>
Files: MANIFEST hints/amigaos.sh installman lib/File/Basename.pm lib/File/Find.pm pod/pod2man.PL pp_sys.c util.c
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[editor's note: no patch file was found for this release, so no
fine-grained changes]
I can't find the password for our ftp server, so I had to drop it into
ftp://ftp.sems.com/pub/incoming/perl5.002b3.tar.gz, which is a drop
directory you can't ls.
The current plan is that Andy is gonna whack on this a little more, and
then release a gamma in a few days when he's happy with it. So don't get
carried away. This is now *late* beta.
In other words, have less than the appropriate amount of fun. :-)
Larry
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See patch #11.
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Most of these patches are pretty self-explanatory. Much of this
is random cleanup in preparation for version 4.0, so I won't talk
about it here. A couple of things should be noted, however.
First, there's a new -0 option that allows you to specify (in octal)
the initial value of $/, the record separator. It's primarily
intended for use with versions of find that support -print0 to
delimit filenames with nulls, but it's more general than that:
null
^A
default
CR
paragraph mode
file slurp mode
This feature is so new that it didn't even make it into the book.
The other major item is that different patchlevels of perl can
now coexist in your bin directory. The names "perl" and "taintperl"
are just links to "perl3.044" and "tperl3.044". This has several
benefits. The perl3.044 invokes the corresponding tperl3.044 rather
than taintperl, so it always runs the correct version. Second, you can
"freeze" a script by putting a #! line referring to a version that
it is known to work with. Third, you can put a new version out
there to try out before making it the default perl. Lastly, it
sells more disk drives. :-)
Barring catastrophe, this will likely be the last patch before
version 4.0 comes out.
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See patch #9.
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The select operator didn't interpret bit vectors correctly on
non-little-endian machines such as Suns. Rather than bollux up
the rather straightforward interpretation of bit vectors, I made
the select operator rearrange the bytes as necessary. So it
is still true that vec($foo,0,1) refers to the first bit of the
first byte of string $foo, even on big-endian machines.
The send() socket operator didn't correctly allow you to specify
a TO argument even though this was documented. (The TO argument
is desirable for sending datagram packets.)
In ANSI standard C, they decided that longjmp() didn't have to
guarantee anything about registers. Several people sent me
some patches that declared certain variables as volatile
rather than register for such compilers. Rather than go that
route, however, I wanted to keep some of these variables in
registers, so I just made sure that the important ones are
restored from non-register locations after longjmp(). I think
"volatile" encourages people to punt too easily.
The foreach construct still had some difficulty with two nested
foreach loops referring to the same array, and to a single
foreach that called its enclosing subroutine recursively.
I think I've got this straight now. You wouldn't think
a little iterator would give some much trouble.
A pattern like /b*/ wouldn't match a null string before the
first character. And certain patterns didn't match correctly
at end of string. The upshot was that
$_ = 'aaa';
s/b*/x/g;
produced 'axaxa' rather than the expected 'xaxaxax'. This has
been fixed. Note however that the split operator will still
not match a null string before the first character, so that
split(/b*/,'aaa') produces ('a','a','a'), not ('','a','a','a','').
The saga continues, and hopefully concludes. I realized I was
fighting a losing battle trying to grep out all the includes
from <time.h> and <sys/time.h>. There are just too many funny
includes, symbols, links and such on too many kinds of machines.
Configure now compiles a test program several different ways to
figure out which way to define the various symbols.
Configure now lets you pick between yacc or bison for your
compiler compiler. If you pick bison, be sure you have alloca
somewhere on your system.
The ANSI function strerror() is now supported where available.
In addition, errno may now be a macro with an lvalue, so errno
isn't declared extern if it's defined as a macro in <errno.h>.
The memcpy() and memset() are now allowed to return void.
There is now support for sys/ndir.h for systems such as Xenix.
It's now also easier to cross compile on a 386 for a 286.
DG/UX has functions setpgrp2() and getpgrp2() to keep the BSD
sematics separate from the SystemV semantics. So now we have
yet another wonderful non-standard way of doing things. There
is also a utime.h file which lets them put time stamps on
files to microsecond resolutions, though perl doesn't take
advantage of this.
The list of optional libraries to be searched for now includes
-lnet_s, -lnsl_s, -lsocket and -lx. We can now find .h files
down in /usr/include/lan.
Microport systems have problems. I've added some CRIPPLED_CC
support for them, but you still need to read the README.uport
file for some extra rigamarole.
In the README file, there are now hints for what to do if your
compile doesn't work right, and specific hints for machines
known to require certain switches.
The grep operator with a simple first argument, such as grep(1,@array),
didn't work right. That one seems silly, but grep($_,@array)
didn't work either. Now it does.
A /$pat/ followed by a // wrongly freed the runtime pattern twice,
causing ill-will on the part of all concerned.
The ord() function now always returns positive even on signed-char
machines. This seems to be less surprising to people. If you
still want a signed value on such machines, you can always use
unpack.
The lib/complete.pl file misused the @_ array. The array has
been renamed.
In the man page, I clarified that s`pat`repl` does command
substitution on the replacement string, that $timeleft from
select() is likely not implemented in many places, and that
the qualified form package'filehandle works as well as
$package'variable. It is also explicitly stated that
certain identifiers (non-alpha, STDIN, etc.) are always
resolved in package main's symbol table.
Perl didn't grok setuid scripts that had a space on the
first line between the shebang and the interpreter name.
In stab.c, sighandler() may now return either void or int,
depending on the value of VOIDSIG.
You couldn't debug a script that used -p or -n because they would
try to slap an extra } on the end of the perldb.pl file. This
upset the parser.
The interpration of strings like " ''$foo'' " caused problems
because the tokener didn't realize that neither single quote
following the variable was indicating a package qualifier.
(It knew the last one wasn't, but was confused about the first one.)
Merely changing an if to a while fixed it. Well, two if's.
Another place we don't want ' to be interpreted as a package
qualifier is if it's the delimiter for an m'pat' or s'pat'repl'.
These have been grandfathered to look like a match and a substitution.
There were a couple of problems in a2p. First, the ops array
was dimensioned too big on 286's. Second, there was a problem
involving passing a union where I should've passed a member of
the union, which meant user-defined functions didn't work right
on some machines.
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A few of the new features: (18 Oct)
* Perl can now handle binary data correctly and has functions to pack and unpack binary structures into arrays or lists. You can now do arbitrary ioctl functions.
* You can now pass things to subroutines by reference.
* Debugger enhancements.
* An array or associative array may now appear in a local() list.
* Array values may now be interpolated into strings.
* Subroutine names are now distinguished by prefixing with &. You can call subroutines without using do, and without passing any argument list at all.
* You can use the new -u switch to cause perl to dump core so that you can run undump and produce a binary executable image. Alternately you can use the "dump" operator after initializing any variables and such.
* You can now chop lists.
* Perl now uses /bin/csh to do filename globbing, if available. This means that filenames with spaces or other strangenesses work right.
* New functions: mkdir and rmdir, getppid, getpgrp and setpgrp, getpriority and setpriority, chroot, ioctl and fcntl, flock, readlink, lstat, rindex, pack and unpack, read, warn, dbmopen and dbmclose, dump, reverse, defined, undef.
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