1 ################################################################################
3 # PPPort_pm.PL -- generate PPPort.pm
5 ################################################################################
9 # $Date: 2004/08/13 12:49:22 +0200 $
11 ################################################################################
13 # Version 3.x, Copyright (C) 2004, Marcus Holland-Moritz.
14 # Version 2.x, Copyright (C) 2001, Paul Marquess.
15 # Version 1.x, Copyright (C) 1999, Kenneth Albanowski.
17 # This program is free software; you can redistribute it and/or
18 # modify it under the same terms as Perl itself.
20 ################################################################################
24 require "parts/ppptools.pl";
26 my $INCLUDE = 'parts/inc';
29 my %embed = map { ( $_->{name} => $_ ) }
30 parse_embed(qw(parts/embed.fnc parts/apidoc.fnc));
32 my(%provides, %prototypes, %explicit);
34 my $data = do { local $/; <DATA> };
35 $data =~ s{^\%(include)\s+(\w+)((?:[^\S\r\n]+.*?)?)\s*$}
36 {eval "$1('$2', $3)" or die $@}gem;
38 $data = expand($data);
40 my @api = sort { lc $a cmp lc $b } keys %provides;
42 $data =~ s{^(.*)__PROVIDED_API__(\s*?)^}
43 {join '', map "$1$_\n", @api}gem;
47 for (keys %explicit) {
48 length > $len and $len = length;
50 my $format = sprintf "%%-%ds %%-%ds %%-%ds", $len+2, $len+5, $len+12;
53 $data =~ s/^(.*)__EXPLICIT_API__(\s*?)^/
54 sprintf("$1$format\n", 'Function', 'Static Request', 'Global Request') .
55 $1 . '-'x$len . "\n" .
56 join('', map { sprintf "$1$format\n", "$_()", "NEED_$_", "NEED_${_}_GLOBAL" }
61 my %raw_base = %{&parse_todo('parts/base')};
62 my %raw_todo = %{&parse_todo('parts/todo')};
65 for (keys %raw_todo) {
66 push @{$todo{$raw_todo{$_}}}, $_;
71 if (exists $raw_todo{$_}) {
72 warn "$INCLUDE/$provides{$_} provides $_, which is still marked "
73 . "todo for " . format_version($raw_todo{$_}) . "\n";
78 for (keys %provides) {
79 next if exists $embed{$_};
81 check(2, "No API definition for provided element $_ found.");
84 push @perl_api, keys %embed;
87 if (exists $provides{$_} && !exists $raw_base{$_}) {
88 check(2, "Mmmh, $_ doesn't seem to need backporting.");
90 my $line = "$_|" . (exists $provides{$_} && exists $raw_base{$_} ? $raw_base{$_} : '') . '|';
91 $line .= ($raw_todo{$_} || '') . '|';
92 $line .= 'p' if exists $provides{$_};
93 if (exists $embed{$_}) {
95 if (exists $e->{flags}{p}) {
96 my $args = $e->{args};
97 $line .= 'v' if @$args && $args->[-1][0] eq '...';
99 $line .= 'n' if exists $e->{flags}{n};
104 $data =~ s/^([\t ]*)__PERL_API__(\s*?)$/
105 join "\n", map "$1$_", sort @perl_api
109 for (reverse sort keys %todo) {
110 my $ver = format_version($_);
111 my $todo = "=item perl $ver\n\n";
112 for (sort @{$todo{$_}}) {
118 $data =~ s{^__UNSUPPORTED_API__(\s*?)^}
119 {join "\n", @todo}gem;
121 $data =~ s{__MIN_PERL__}{5.003}g;
122 $data =~ s{__MAX_PERL__}{5.9.2}g;
124 open FH, ">PPPort.pm" or die "PPPort.pm: $!\n";
132 my($file, $opt) = @_;
134 print "including $file\n";
136 my $data = parse_partspec("$INCLUDE/$file");
138 for (@{$data->{provides}}) {
139 if (exists $provides{$_}) {
140 if ($provides{$_} ne $file) {
141 warn "$file: $_ already provided by $provides{$_}\n";
145 $provides{$_} = $file;
149 for (keys %{$data->{prototypes}}) {
150 $prototypes{$_} = $data->{prototypes}{$_};
151 $data->{implementation} =~ s/^$_(?=\s*\()/$DPPP($_)/g;
154 my $out = $data->{implementation};
156 if (exists $opt->{indent}) {
157 $out =~ s/^/$opt->{indent}/gm;
166 $code =~ s{^(\s*#\s*(?:el)?if\s+)(.*)$}{$1.expand_pp_expressions($2)}gem;
176 (?:[^\r\n\\]|\\[^\r\n])*
180 (?:[^\r\n\\]|\\[^\r\n])*
184 {expand_undefined($2, $1, $3)}gemx;
190 my($macro, $withargs, $def) = @_;
191 my $rv = "#ifndef $macro\n# define ";
194 $rv .= sprintf "%-30s %s", $withargs, $def;
205 sub expand_pp_expressions
208 $pp =~ s/\{([^\}]+)\}/expand_pp_expr($1)/ge;
216 if ($expr =~ /^\s*version\s*(<|>|==|!=|>=|<=)\s*([\d._]+)\s*$/i) {
217 my($op, $ver) = ($1, $2);
218 my($r, $v, $s) = parse_version($ver);
219 $r == 5 or die "only Perl revision 5 is supported\n";
220 $op eq '==' and return "((PERL_VERSION == $v) && (PERL_SUBVERSION == $s))";
221 $op eq '!=' and return "((PERL_VERSION != $v) || (PERL_SUBVERSION != $s))";
222 $op =~ /([<>])/ and return "((PERL_VERSION $1 $v) || ((PERL_VERSION == $v) && (PERL_SUBVERSION $op $s)))";
225 if ($expr =~ /^\s*need\s*(\w+)\s*$/i) {
227 my $e = $embed{$func} or die "unknown API function '$func' in NEED\n";
228 my $proto = make_prototype($e);
229 if (exists $prototypes{$func}) {
230 if (compare_prototypes($proto, $prototypes{$func})) {
231 check(1, "differing prototypes for $func:\n API: $proto\n PPP: $prototypes{$func}");
232 $proto = $prototypes{$func};
236 warn "found no prototype for $func\n";;
239 $explicit{$func} = 1;
241 $proto =~ s/\b$func(?=\s*\()/$DPPP($func)/;
242 my $embed = make_embed($e);
244 return "defined(NEED_$func)\n"
253 . "#if defined(NEED_$func) || defined(NEED_${func}_GLOBAL)"
257 die "cannot expand preprocessor expression '$expr'\n";
264 my $a = do { my $x = 'a'; join ',', map { $x++ } 1 .. @{$f->{args}} };
266 if ($f->{flags}{n}) {
267 if ($f->{flags}{p}) {
268 return "#define $n $DPPP($n)\n" .
269 "#define Perl_$n $DPPP($n)";
272 return "#define $n $DPPP($n)";
281 if ($f->{flags}{p}) {
282 return $undef . "#define $n($a) $DPPP($n)(aTHX_ $a)\n" .
283 "#define Perl_$n $DPPP($n)";
286 return $undef . "#define $n($a) $DPPP($n)(aTHX_ $a)";
295 if (exists $ENV{DPPP_CHECK_LEVEL} and $ENV{DPPP_CHECK_LEVEL} >= $level) {
296 print STDERR @_, "\n";
301 ################################################################################
303 # !!!!! Do NOT edit this file directly! -- Edit PPPort_pm.PL instead. !!!!!
305 ################################################################################
307 # Perl/Pollution/Portability
309 ################################################################################
313 # $Date: 2004/08/13 12:49:22 +0200 $
315 ################################################################################
317 # Version 3.x, Copyright (C) 2004, Marcus Holland-Moritz.
318 # Version 2.x, Copyright (C) 2001, Paul Marquess.
319 # Version 1.x, Copyright (C) 1999, Kenneth Albanowski.
321 # This program is free software; you can redistribute it and/or
322 # modify it under the same terms as Perl itself.
324 ################################################################################
328 Devel::PPPort - Perl/Pollution/Portability
332 Devel::PPPort::WriteFile(); # defaults to ./ppport.h
333 Devel::PPPort::WriteFile('someheader.h');
337 Perl's API has changed over time, gaining new features, new functions,
338 increasing its flexibility, and reducing the impact on the C namespace
339 environment (reduced pollution). The header file written by this module,
340 typically F<ppport.h>, attempts to bring some of the newer Perl API
341 features to older versions of Perl, so that you can worry less about
342 keeping track of old releases, but users can still reap the benefit.
344 C<Devel::PPPort> contains a single function, called C<WriteFile>. Its
345 only purpose is to write the F<ppport.h> C header file. This file
346 contains a series of macros and, if explicitly requested, functions that
347 allow XS modules to be built using older versions of Perl. Currently,
348 Perl versions from __MIN_PERL__ to __MAX_PERL__ are supported.
350 This module is used by C<h2xs> to write the file F<ppport.h>.
352 =head2 Why use ppport.h?
354 You should use F<ppport.h> in modern code so that your code will work
355 with the widest range of Perl interpreters possible, without significant
358 You should attempt older code to fully use F<ppport.h>, because the
359 reduced pollution of newer Perl versions is an important thing. It's so
360 important that the old polluting ways of original Perl modules will not be
361 supported very far into the future, and your module will almost certainly
362 break! By adapting to it now, you'll gain compatibility and a sense of
363 having done the electronic ecology some good.
365 =head2 How to use ppport.h
367 Don't direct the users of your module to download C<Devel::PPPort>.
368 They are most probably no XS writers. Also, don't make F<ppport.h>
369 optional. Rather, just take the most recent copy of F<ppport.h> that
370 you can find (e.g. by generating it with the latest C<Devel::PPPort>
371 release from CPAN), copy it into your project, adjust your project to
372 use it, and distribute the header along with your module.
374 =head2 Running ppport.h
376 But F<ppport.h> is more than just a C header. It's also a Perl script
377 that can check your source code. It will suggest hints and portability
378 notes, and can even make suggestions on how to change your code. You
379 can run it like any other Perl program:
383 It also has embedded documentation, so you can use
387 to find out more about how to use it.
393 C<WriteFile> takes one optional argument. When called with one
394 argument, it expects to be passed a filename. When called with
395 no arguments, it defaults to the filename F<ppport.h>.
397 The function returns a true value if the file was written successfully.
398 Otherwise it returns a false value.
402 F<ppport.h> supports Perl versions from __MIN_PERL__ to __MAX_PERL__
403 in threaded and non-threaded configurations.
405 =head2 Provided Perl compatibility API
407 The header file written by this module, typically F<ppport.h>, provides
408 access to the following elements of the Perl API that is not available
409 in older Perl releases:
413 =head2 Perl API not supported by ppport.h
415 There is still a big part of the API not supported by F<ppport.h>.
416 Either because it doesn't make sense to back-port that part of the API,
417 or simply because it hasn't been implemented yet. Patches welcome!
419 Here's a list of the currently unsupported API, and also the version of
420 Perl below which it is unsupported:
430 If you find any bugs, C<Devel::PPPort> doesn't seem to build on your
431 system or any of its tests fail, please use the CPAN Request Tracker
432 at L<http://rt.cpan.org/> to create a ticket for the module.
440 Version 1.x of Devel::PPPort was written by Kenneth Albanowski.
444 Version 2.x was ported to the Perl core by Paul Marquess.
448 Version 3.x was ported back to CPAN by Marcus Holland-Moritz.
454 Version 3.x, Copyright (C) 2004, Marcus Holland-Moritz.
456 Version 2.x, Copyright (C) 2001, Paul Marquess.
458 Version 1.x, Copyright (C) 1999, Kenneth Albanowski.
460 This program is free software; you can redistribute it and/or
461 modify it under the same terms as Perl itself.
465 See L<h2xs>, L<ppport.h>.
469 package Devel::PPPort;
473 use vars qw($VERSION @ISA $data);
475 $VERSION = do { my @r = '$Snapshot: /Devel-PPPort/3.00 $' =~ /(\d+\.\d+(?:_\d+)?)/; @r ? $r[0] : '9.99' };
477 @ISA = qw(DynaLoader);
479 bootstrap Devel::PPPort;
482 $data = do { local $/; <DATA> };
484 my $pkg = 'Devel::PPPort';
485 $data =~ s/__PERL_VERSION__/$]/g;
486 $data =~ s/__VERSION__/$VERSION/g;
487 $data =~ s/__DATE__/$now/g;
488 $data =~ s/__PKG__/$pkg/g;
489 $data =~ s/^POD\s//gm;
494 my $file = shift || 'ppport.h';
496 $copy =~ s/\bppport\.h\b/$file/g;
498 open F, ">$file" or return undef;
512 ----------------------------------------------------------------------
514 ppport.h -- Perl/Pollution/Portability Version __VERSION__
516 Automatically created by __PKG__ running under
517 perl __PERL_VERSION__ on __DATE__.
519 Do NOT edit this file directly! -- Edit PPPort_pm.PL and the
520 includes in parts/inc/ instead.
522 Use 'perldoc ppport.h' to view the documentation below.
524 ----------------------------------------------------------------------
528 %include ppphdoc { indent => 'POD ' }
535 #ifndef _P_P_PORTABILITY_H_
536 #define _P_P_PORTABILITY_H_
538 #ifndef DPPP_NAMESPACE
539 # define DPPP_NAMESPACE DPPP_
542 #define DPPP_CAT2(x,y) CAT2(x,y)
543 #define DPPP_(name) DPPP_CAT2(DPPP_NAMESPACE, name)
575 #endif /* _P_P_PORTABILITY_H_ */
577 /* End of File ppport.h */