use strict;
BEGIN { require warnings if "$]" > '5.006' }
# Disable broken TRIE-optimization BEGIN { eval '${^RE_TRIE_MAXBUF} = -1' if "$]" >= 5.009004 && "$]" <= 5.009005 }
my $VERSION = __VERSION__;
my %opt = ( quiet => 0, diag => 1, hints => 1, changes => 1, cplusplus => 0, filter => 1, strip => 0, version => 0, );
my($ppport) = $0 =~ /([\w.]+)$/; my $LF = '(?:\r\n|[\r\n])'; # line feed my $HS = "[ \t]"; # horizontal whitespace
# Never use C comments in this file! my $ccs = '/'.'*'; my $cce = '*'.'/'; my $rccs = quotemeta $ccs; my $rcce = quotemeta $cce;
eval { require Getopt::Long; Getopt::Long::GetOptions(\%opt, qw( help quiet diag! filter! hints! changes! cplusplus strip version patch=s copy=s diff=s compat-version=s list-provided list-unsupported api-info=s )) or usage(); };
if ($@ and grep /^-/, @ARGV) { usage() if "@ARGV" =~ /^--?h(?:elp)?$/; die "Getopt::Long not found. Please don't use any options.\n"; }
if ($opt{version}) { print "This is $0 $VERSION.\n"; exit 0; }
usage() if $opt{help}; strip() if $opt{strip};
$opt{'compat-version'} = __MIN_PERL__ unless exists $opt{'compat-version'}; $opt{'compat-version'} = int_parse_version($opt{'compat-version'});
my $int_min_perl = int_parse_version(__MIN_PERL__);
# Each element of this hash looks something like: # 'Poison' => { # 'base' => '5.008000', # 'provided' => 1, # 'todo' => '5.003007' # }, my %API = map { /^(\w+)\|([^|]*)\|([^|]*)\|(\w*)$/ ? ( $1 => { ($2 ? ( base => $2 ) : ()), ($3 ? ( todo => $3 ) : ()), (index($4, 'v') >= 0 ? ( varargs => 1 ) : ()), (index($4, 'p') >= 0 ? ( provided => 1 ) : ()), (index($4, 'n') >= 0 ? ( noTHXarg => 1 ) : ()), (index($4, 'c') >= 0 ? ( core_only => 1 ) : ()), (index($4, 'd') >= 0 ? ( deprecated => 1 ) : ()), (index($4, 'i') >= 0 ? ( inaccessible => 1 ) : ()), (index($4, 'x') >= 0 ? ( experimental => 1 ) : ()), (index($4, 'u') >= 0 ? ( undocumented => 1 ) : ()), (index($4, 'o') >= 0 ? ( ppport_fnc => 1 ) : ()), (index($4, 'V') >= 0 ? ( unverified => 1 ) : ()), } ) : die "invalid spec: $_" } qw( __PERL_API__ );
if (exists $opt{'list-unsupported'}) { my $f; for $f (sort dictionary_order keys %API) { next if $API{$f}{core_only}; next if $API{$f}{beyond_depr}; next if $API{$f}{inaccessible}; next if $API{$f}{experimental}; next unless $API{$f}{todo}; next if int_parse_version($API{$f}{todo}) <= $int_min_perl; print "$f ", '.'x(40-length($f)), " ", format_version($API{$f}{todo}), "\n"; } exit 0; }
# Scan for hints, possible replacement candidates, etc.
my(%replace, %need, %hints, %warnings, %depends); my $replace = 0; my($hint, $define, $function);
sub find_api { BEGIN { 'warnings'->unimport('uninitialized') if "$]" > '5.006' } my $code = shift; $code =~ s{ / (?: \*[^*]*\*+(?:[^$ccs][^*]*\*+)* / | /[^\r\n]*) | "[^"\\]*(?:\\.[^"\\]*)*" | '[^'\\]*(?:\\.[^'\\]*)*' }{}egsx; grep { exists $API{$_} } $code =~ /(\w+)/mg; }
while (<DATA>) { if ($hint) {
# Here, we are in the middle of accumulating a hint or warning.
my $end_of_hint = 0;
# A line containing a comment end marker closes the hint. Remove that
# marker for processing below.
if (s/\s*$rcce(.*?)\s*$//) {
die "Nothing can follow the end of comment in '$_'\n" if length $1 > 0;
$end_of_hint = 1;
}
# Set $h to the hash of which type.
my $h = $hint->[0] eq 'Hint' ? \%hints : \%warnings;
# Ignore any leading and trailing white space, and an optional star comment
# continuation marker, then place the meat of the line into $1
m/^\s*(?:\*\s*)?(.*?)\s*$/;
# Add the meat of this line to the hash value of each API element it
# applies to
for (@{$hint->[1]}) {
$h->{$_} ||= ''; # avoid the warning older perls generate
$h->{$_} .= "$1\n";
}
# If the line had a comment close, we are through with this hint
undef $hint if $end_of_hint;
next;
}
# Set up $hint if this is the beginning of a Hint: or Warning:
# These are from a multi-line C comment in the file, with the first line
# looking like (a space has been inserted because this file can't have C
# comment markers in it):
# / * Warning: PL_expect, PL_copline, PL_rsfp
#
# $hint becomes
# [
# 'Warning',
# [
# 'PL_expect',
# 'PL_copline',
# 'PL_rsfp',
# ],
# ]
if (m{^\s*$rccs\s+(Hint|Warning):\s+(\w+(?:,?\s+\w+)*)\s*$}) {
$hint = [$1, [split /,?\s+/, $2]];
next;
}
if ($define) { # If in the middle of a definition...
# append a continuation line ending with backslash.
if ($define->[1] =~ /\\$/) {
$define->[1] .= $_;
}
else { # Otherwise this line ends the definition, make foo depend on bar
# (and what bar depends on) if its not one of ppp's own constructs
if (exists $API{$define->[0]} && $define->[1] !~ /^DPPP_\(/) {
my @n = find_api($define->[1]);
push @{$depends{$define->[0]}}, @n if @n
}
undef $define;
}
}
# For '#define foo bar' or '#define foo(a,b,c) bar', $define becomes a
# reference to [ foo, bar ]
$define = [$1, $2] if m{^\s*#\s*define\s+(\w+)(?:\([^)]*\))?\s+(.*)};
if ($function) {
if (/^}/) {
if (exists $API{$function->[0]}) {
my @n = find_api($function->[1]);
push @{$depends{$function->[0]}}, @n if @n
}
undef $function;
}
else {
$function->[1] .= $_;
}
}
$function = [$1, ''] if m{^DPPP_\(my_(\w+)\)};
# Set $replace to the number given for lines that look like
# / * Replace: \d+ * /
# (blanks added to keep real C comments from appearing in this file)
# Thus setting it to 1 starts a region where replacements are automatically
# done, and setting it to 0 ends that region.
$replace = $1 if m{^\s*$rccs\s+Replace:\s+(\d+)\s+$rcce\s*$};
# Add bar => foo to %replace for lines like '#define foo bar in a region
# where $replace is non-zero
$replace{$2} = $1 if $replace and m{^\s*#\s*define\s+(\w+)(?:\([^)]*\))?\s+(\w+)};
# Add bar => foo to %replace for lines like '#define foo bar / * Replace * /
# (blanks added to keep real C comments from appearing in this file)
$replace{$2} = $1 if m{^\s*#\s*define\s+(\w+)(?:\([^)]*\))?\s+(\w+).*$rccs\s+Replace\s+$rcce};
# Add foo => bar to %replace for lines like / * Replace foo with bar * /
# (blanks added to keep real C comments from appearing in this file)
$replace{$1} = $2 if m{^\s*$rccs\s+Replace (\w+) with (\w+)\s+$rcce\s*$};
# For lines like / * foo, bar depends on baz, bat * /
# create a list of the elements on the rhs, and make that list apply to each
# element in the lhs, which becomes a key in \%depends.
# (blanks added to keep real C comments from appearing in this file)
if (m{^\s*$rccs\s+(\w+(\s*,\s*\w+)*)\s+depends\s+on\s+(\w+(\s*,\s*\w+)*)\s+$rcce\s*$}) {
my @deps = map { s/\s+//g; $_ } split /,/, $3;
my $d;
for $d (map { s/\s+//g; $_ } split /,/, $1) {
push @{$depends{$d}}, @deps;
}
}
$need{$1} = 1 if m{^#if\s+defined\(NEED_(\w+)(?:_GLOBAL)?\)};
}for (values %depends) { my %seen; $_ = [sort dictionary_order grep !$seen{$_}++, @$_]; }
if (exists $opt{'api-info'}) { my $f; my $count = 0; my $match = $opt{'api-info'} =~ m!^/(.*)/$! ? $1 : "^\Q$opt{'api-info'}\E\$"; for $f (sort dictionary_order keys %API) { next unless $f =~ /$match/; print "\n=== $f ===\n"; my $info = 0; my $base; $base = int_parse_version($API{$f}{base}) if $API{$f}{base}; my $todo; $todo = int_parse_version($API{$f}{todo}) if $API{$f}{todo};
# Output information if it is generally publicly usable
if ($base && ! $API{$f}{inaccessible} && ! $API{$f}{core_only}) {
my $with_or= "";
if ( $base <= $int_min_perl
|| ( (! $API{$f}{provided} && ! $todo)
|| ($todo && $todo >= $base)))
{
$with_or= " with or";
}
print "\nSupported at least since perl-",
format_version($base), ",$with_or without $ppport.";
if ($API{$f}{unverified}) {
print "\nThis information is based on inspection of the source code",
" and has not been\n",
"verified by successful compilation.";
}
print "\n";
$info++;
}
if ($API{$f}{provided} || $todo) {
print "\nThis is only supported by $ppport, and NOT by perl versions going forward.\n" unless $base;
if ($todo) {
if (! $base || $todo < $base) {
my $additionally = "";
$additionally .= " additionally" if $base;
print "$ppport$additionally provides support at least back to perl-",
format_version($todo),
".\n";
}
}
elsif (! $base || $base > $int_min_perl) {
if (exists $depends{$f}) {
my $max = 0;
for (@{$depends{$f}}) {
$max = int_parse_version($API{$_}{todo}) if $API{$_}{todo} && $API{$_}{todo} > $max;
# XXX What to assume unspecified values are? This effectively makes them MIN_PERL
}
$todo = $max if $max;
}
print "\n$ppport provides support for this, but ironically, does not",
" currently know,\n",
"for this report, the minimum version it supports for this";
if ($API{$f}{undocumented}) {
print " and many things\n",
"it provides that are implemented as macros and aren't",
" documented. You can\n",
"help by submitting a documentation patch";
}
print ".\n";
if ($todo) {
if ($todo <= $int_min_perl) {
print "It may very well be supported all the way back to ",
format_version(__MIN_PERL__), ".\n";
}
else {
print "But given the things $f depends on, it's a good",
" guess that it isn't\n",
"supported prior to ", format_version($todo), ".\n";
}
}
}
}
if ($API{$f}{provided}) {
print "Support needs to be explicitly requested by #define NEED_$f\n",
"(or #define NEED_${f}_GLOBAL).\n" if exists $need{$f};
$info++;
}
if ($base || ! $API{$f}{ppport_fnc}) {
my $email = "Send email to perl5-porters\@perl.org if you need to have this functionality.\n";
if ($API{$f}{inaccessible}) {
print "\nThis is not part of the public API, and may not even be accessible to XS code.\n";
$info++;
}
elsif ($API{$f}{core_only}) {
print "\nThis is not part of the public API, and should not be used by XS code.\n";
$info++;
}
elsif ($API{$f}{deprecated}) {
print "\nThis is deprecated and should not be used. Convert existing uses.\n";
$info++;
}
elsif ($API{$f}{experimental}) {
print "\nThe API for this is unstable and should not be used by XS code.\n", $email;
$info++;
}
elsif ($API{$f}{undocumented}) {
print "\nSince this is undocumented, the API should be considered unstable.\n";
if ($API{$f}{provided}) {
print "Consider bringing this up on the list: perl5-porters\@perl.org.\n";
}
else {
print "It may be that this is not intended for XS use, or it may just be\n",
"that no one has gotten around to documenting it.\n", $email;
}
$info++;
}
unless ($info) {
print "No portability information available. Check your spelling; or",
" this could be\na bug in Devel::PPPort. To report an issue:\n",
"https://github.com/Dual-Life/Devel-PPPort/issues/new\n";
}
}
print "\nDepends on: ", join(', ', @{$depends{$f}}), ".\n"
if exists $depends{$f};
if (exists $hints{$f} || exists $warnings{$f}) {
print "\n$hints{$f}" if exists $hints{$f};
print "\nWARNING:\n$warnings{$f}" if exists $warnings{$f};
$info++;
}
$count++;
}
$count or print "\nFound no API matching '$opt{'api-info'}'.";
print "\n";
exit 0;
}if (exists $opt{'list-provided'}) { my $f; for $f (sort dictionary_order keys %API) { next unless $API{$f}{provided}; my @flags; push @flags, 'explicit' if exists $need{$f}; push @flags, 'depend' if exists $depends{$f}; push @flags, 'hint' if exists $hints{$f}; push @flags, 'warning' if exists $warnings{$f}; my $flags = @flags ? ' ['.join(', ', @flags).']' : ''; print "$f$flags\n"; } exit 0; }
my @files; my @srcext = qw( .xs .c .h .cc .cpp -c.inc -xs.inc ); my $srcext = join '|', map { quotemeta $_ } @srcext;
if (@ARGV) { my %seen; for (@ARGV) { if (-e) { if (-f) { push @files, $_ unless $seen{$_}++; } else { warn "'$_' is not a file.\n" } } else { my @new = grep { -f } glob $_ or warn "'$_' does not exist.\n"; push @files, grep { !$seen{$_}++ } @new; } } } else { eval { require File::Find; File::Find::find(sub { $File::Find::name =~ /($srcext)$/i and push @files, $File::Find::name; }, '.'); }; if ($@) { @files = map { glob "*$_" } @srcext; } }
if (!@ARGV || $opt{filter}) { my(@in, @out); my %xsc = map { /(.*)\.xs$/ ? ("$1.c" => 1, "$1.cc" => 1) : () } @files; for (@files) { my $out = exists $xsc{$_} || /\b\Q$ppport\E$/i || !/($srcext)$/i; push @{ $out ? \@out : \@in }, $_; } if (@ARGV && @out) { warning("Skipping the following files (use --nofilter to avoid this):\n| ", join "\n| ", @out); } @files = @in; }
die "No input files given!\n" unless @files;
my(%files, %global, %revreplace); %revreplace = reverse %replace; my $filename; my $patch_opened = 0;
for $filename (@files) { unless (open IN, "<$filename") { warn "Unable to read from $filename: $!\n"; next; }
info("Scanning $filename ...");
my $c = do { local $/; <IN> };
close IN;
my %file = (orig => $c, changes => 0);
# Temporarily remove C/XS comments and strings from the code
my @ccom;
$c =~ s{
( ^$HS*\#$HS*include\b[^\r\n]+\b(?:\Q$ppport\E|XSUB\.h)\b[^\r\n]*
| ^$HS*\#$HS*(?:define|elif|if(?:def)?)\b[^\r\n]* )
| ( ^$HS*\#[^\r\n]*
| "[^"\\]*(?:\\.[^"\\]*)*"
| '[^'\\]*(?:\\.[^'\\]*)*'
| / (?: \*[^*]*\*+(?:[^$ccs][^*]*\*+)* / | /[^\r\n]* ) )
}{ defined $2 and push @ccom, $2;
defined $1 ? $1 : "$ccs$#ccom$cce" }mgsex;
$file{ccom} = \@ccom;
$file{code} = $c;
$file{has_inc_ppport} = $c =~ /^$HS*#$HS*include[^\r\n]+\b\Q$ppport\E\b/m;
my $func;
for $func (keys %API) {
my $match = $func;
$match .= "|$revreplace{$func}" if exists $revreplace{$func};
if ($c =~ /\b(?:Perl_)?($match)\b/) {
$file{uses_replace}{$1}++ if exists $revreplace{$func} && $1 eq $revreplace{$func};
$file{uses_Perl}{$func}++ if $c =~ /\bPerl_$func\b/;
if (exists $API{$func}{provided}) {
$file{uses_provided}{$func}++;
if ( ! exists $API{$func}{base}
|| int_parse_version($API{$func}{base}) > $opt{'compat-version'})
{
$file{uses}{$func}++;
my @deps = rec_depend($func);
if (@deps) {
$file{uses_deps}{$func} = \@deps;
for (@deps) {
$file{uses}{$_} = 0 unless exists $file{uses}{$_};
}
}
for ($func, @deps) {
$file{needs}{$_} = 'static' if exists $need{$_};
}
}
}
if ( exists $API{$func}{todo}
&& int_parse_version($API{$func}{todo}) > $opt{'compat-version'})
{
if ($c =~ /\b$func\b/) {
$file{uses_todo}{$func}++;
}
}
}
}
while ($c =~ /^$HS*#$HS*define$HS+(NEED_(\w+?)(_GLOBAL)?)\b/mg) {
if (exists $need{$2}) {
$file{defined $3 ? 'needed_global' : 'needed_static'}{$2}++;
}
else { warning("Possibly wrong #define $1 in $filename") }
}
for (qw(uses needs uses_todo needed_global needed_static)) {
for $func (keys %{$file{$_}}) {
push @{$global{$_}{$func}}, $filename;
}
}
$files{$filename} = \%file;
}# Globally resolve NEED_'s my $need; for $need (keys %{$global{needs}}) { if (@{$global{needs}{$need}} > 1) { my @targets = @{$global{needs}{$need}}; my @t = grep $files{$_}{needed_global}{$need}, @targets; @targets = @t if @t; @t = grep /\.xs$/i, @targets; @targets = @t if @t; my $target = shift @targets; $files{$target}{needs}{$need} = 'global'; for (@{$global{needs}{$need}}) { $files{$_}{needs}{$need} = 'extern' if $_ ne $target; } } }
for $filename (@files) { exists $files{$filename} or next;
info("=== Analyzing $filename ===");
my %file = %{$files{$filename}};
my $func;
my $c = $file{code};
my $warnings = 0;
for $func (sort dictionary_order keys %{$file{uses_Perl}}) {
if ($API{$func}{varargs}) {
unless ($API{$func}{noTHXarg}) {
my $changes = ($c =~ s{\b(Perl_$func\s*\(\s*)(?!aTHX_?)(\)|[^\s)]*\))}
{ $1 . ($2 eq ')' ? 'aTHX' : 'aTHX_ ') . $2 }ge);
if ($changes) {
warning("Doesn't pass interpreter argument aTHX to Perl_$func");
$file{changes} += $changes;
}
}
}
else {
warning("Uses Perl_$func instead of $func");
$file{changes} += ($c =~ s{\bPerl_$func(\s*)\((\s*aTHX_?)?\s*}
{$func$1(}g);
}
}
for $func (sort dictionary_order keys %{$file{uses_replace}}) {
warning("Uses $func instead of $replace{$func}");
$file{changes} += ($c =~ s/\b$func\b/$replace{$func}/g);
}
for $func (sort dictionary_order keys %{$file{uses_provided}}) {
if ($file{uses}{$func}) {
if (exists $file{uses_deps}{$func}) {
diag("Uses $func, which depends on ", join(', ', @{$file{uses_deps}{$func}}));
}
else {
diag("Uses $func");
}
}
$warnings += hint($func);
}
unless ($opt{quiet}) {
for $func (sort dictionary_order keys %{$file{uses_todo}}) {
next if int_parse_version($API{$func}{todo}) <= $int_min_perl;
print "*** WARNING: Uses $func, which may not be portable below perl ",
format_version($API{$func}{todo}), ", even with '$ppport'\n";
$warnings++;
}
}
for $func (sort dictionary_order keys %{$file{needed_static}}) {
my $message = '';
if (not exists $file{uses}{$func}) {
$message = "No need to define NEED_$func if $func is never used";
}
elsif (exists $file{needs}{$func} && $file{needs}{$func} ne 'static') {
$message = "No need to define NEED_$func when already needed globally";
}
if ($message) {
diag($message);
$file{changes} += ($c =~ s/^$HS*#$HS*define$HS+NEED_$func\b.*$LF//mg);
}
}
for $func (sort dictionary_order keys %{$file{needed_global}}) {
my $message = '';
if (not exists $global{uses}{$func}) {
$message = "No need to define NEED_${func}_GLOBAL if $func is never used";
}
elsif (exists $file{needs}{$func}) {
if ($file{needs}{$func} eq 'extern') {
$message = "No need to define NEED_${func}_GLOBAL when already needed globally";
}
elsif ($file{needs}{$func} eq 'static') {
$message = "No need to define NEED_${func}_GLOBAL when only used in this file";
}
}
if ($message) {
diag($message);
$file{changes} += ($c =~ s/^$HS*#$HS*define$HS+NEED_${func}_GLOBAL\b.*$LF//mg);
}
}
$file{needs_inc_ppport} = keys %{$file{uses}};
if ($file{needs_inc_ppport}) {
my $pp = '';
for $func (sort dictionary_order keys %{$file{needs}}) {
my $type = $file{needs}{$func};
next if $type eq 'extern';
my $suffix = $type eq 'global' ? '_GLOBAL' : '';
unless (exists $file{"needed_$type"}{$func}) {
if ($type eq 'global') {
diag("Files [@{$global{needs}{$func}}] need $func, adding global request");
}
else {
diag("File needs $func, adding static request");
}
$pp .= "#define NEED_$func$suffix\n";
}
}
if ($pp && ($c =~ s/^(?=$HS*#$HS*define$HS+NEED_\w+)/$pp/m)) {
$pp = '';
$file{changes}++;
}
unless ($file{has_inc_ppport}) {
diag("Needs to include '$ppport'");
$pp .= qq(#include "$ppport"\n)
}
if ($pp) {
$file{changes} += ($c =~ s/^($HS*#$HS*define$HS+NEED_\w+.*?)^/$1$pp/ms)
|| ($c =~ s/^(?=$HS*#$HS*include.*\Q$ppport\E)/$pp/m)
|| ($c =~ s/^($HS*#$HS*include.*XSUB.*\s*?)^/$1$pp/m)
|| ($c =~ s/^/$pp/);
}
}
else {
if ($file{has_inc_ppport}) {
diag("No need to include '$ppport'");
$file{changes} += ($c =~ s/^$HS*?#$HS*include.*\Q$ppport\E.*?$LF//m);
}
}
# put back in our C comments
my $ix;
my $cppc = 0;
my @ccom = @{$file{ccom}};
for $ix (0 .. $#ccom) {
if (!$opt{cplusplus} && $ccom[$ix] =~ s!^//!!) {
$cppc++;
$file{changes} += $c =~ s/$rccs$ix$rcce/$ccs$ccom[$ix] $cce/;
}
else {
$c =~ s/$rccs$ix$rcce/$ccom[$ix]/;
}
}
if ($cppc) {
my $s = $cppc != 1 ? 's' : '';
warning("Uses $cppc C++ style comment$s, which is not portable");
}
my $s = $warnings != 1 ? 's' : '';
my $warn = $warnings ? " ($warnings warning$s)" : '';
info("Analysis completed$warn");
if ($file{changes}) {
if (exists $opt{copy}) {
my $newfile = "$filename$opt{copy}";
if (-e $newfile) {
error("'$newfile' already exists, refusing to write copy of '$filename'");
}
else {
local *F;
if (open F, ">$newfile") {
info("Writing copy of '$filename' with changes to '$newfile'");
print F $c;
close F;
}
else {
error("Cannot open '$newfile' for writing: $!");
}
}
}
elsif (exists $opt{patch} || $opt{changes}) {
if (exists $opt{patch}) {
unless ($patch_opened) {
if (open PATCH, ">$opt{patch}") {
$patch_opened = 1;
}
else {
error("Cannot open '$opt{patch}' for writing: $!");
delete $opt{patch};
$opt{changes} = 1;
goto fallback;
}
}
mydiff(\*PATCH, $filename, $c);
}
else {
fallback:
info("Suggested changes:");
mydiff(\*STDOUT, $filename, $c);
}
}
else {
my $s = $file{changes} == 1 ? '' : 's';
info("$file{changes} potentially required change$s detected");
}
}
else {
info("Looks good");
}
}close PATCH if $patch_opened;
exit 0;
#######################################################################
sub try_use { eval "use @_;"; return $@ eq '' }
sub mydiff { local *F = shift; my($file, $str) = @_; my $diff;
if (exists $opt{diff}) {
$diff = run_diff($opt{diff}, $file, $str);
}
if (!defined $diff and try_use('Text::Diff')) {
$diff = Text::Diff::diff($file, \$str, { STYLE => 'Unified' });
$diff = <<HEADER . $diff;
--- $file
+++ $file.patched
HEADER
}
if (!defined $diff) {
$diff = run_diff('diff -u', $file, $str);
}
if (!defined $diff) {
$diff = run_diff('diff', $file, $str);
}
if (!defined $diff) {
error("Cannot generate a diff. Please install Text::Diff or use --copy.");
return;
}
print F $diff;
}sub run_diff { my($prog, $file, $str) = @_; my $tmp = 'dppptemp'; my $suf = 'aaa'; my $diff = ''; local *F;
while (-e "$tmp.$suf") { $suf++ }
$tmp = "$tmp.$suf";
if (open F, ">$tmp") {
print F $str;
close F;
if (open F, "$prog $file $tmp |") {
while (<F>) {
s/\Q$tmp\E/$file.patched/;
$diff .= $_;
}
close F;
unlink $tmp;
return $diff;
}
unlink $tmp;
}
else {
error("Cannot open '$tmp' for writing: $!");
}
return undef;
}sub rec_depend { my($func, $seen) = @_; return () unless exists $depends{$func}; $seen = {%{$seen||{}}}; return () if $seen->{$func}++; my %s; grep !$s{$_}++, map { ($_, rec_depend($_, $seen)) } @{$depends{$func}}; }
sub info { $opt{quiet} and return; print @_, "\n"; }
sub diag { $opt{quiet} and return; $opt{diag} and print @_, "\n"; }
sub warning { $opt{quiet} and return; print "*** ", @_, "\n"; }
sub error { print "*** ERROR: ", @_, "\n"; }
my %given_hints; my %given_warnings; sub hint { $opt{quiet} and return; my $func = shift; my $rv = 0; if (exists $warnings{$func} && !$given_warnings{$func}++) { my $warn = $warnings{$func}; $warn =~ s!^!*** !mg; print "*** WARNING: $func\n", $warn; $rv++; } if ($opt{hints} && exists $hints{$func} && !$given_hints{$func}++) { my $hint = $hints{$func}; $hint =~ s/^/ /mg; print " --- hint for $func ---\n", $hint; } $rv; }
sub usage { my($usage) = do { local(@ARGV,$/)=($0); <> } =~ /^=head\d$HS+SYNOPSIS\s*^(.*?)\s*^=/ms; my %M = ( 'I' => '*' ); $usage =~ s/^\s*perl\s+\S+/$^X $0/; $usage =~ s/([A-Z])<([^>]+)>/$M{$1}$2$M{$1}/g;
print <<ENDUSAGE;Usage: $usage
See perldoc $0 for details.
ENDUSAGE
exit 2;
}sub strip { my $self = do { local(@ARGV,$/)=($0); <> }; my($copy) = $self =~ /^=head\d\s+COPYRIGHT\s*^(.*?)^=\w+/ms; $copy =~ s/^(?=\S+)/ /gms; $self =~ s/^$HS+Do NOT edit.*?(?=^-)/$copy/ms; $self =~ s/^SKIP.*(?=^__DATA__)/SKIP if (\@ARGV && \$ARGV[0] eq '--unstrip') { eval { require Devel::PPPort }; \$@ and die "Cannot require Devel::PPPort, please install.\\n"; if (eval \$Devel::PPPort::VERSION < $VERSION) { die "$0 was originally generated with Devel::PPPort $VERSION.\\n" . "Your Devel::PPPort is only version \$Devel::PPPort::VERSION.\\n" . "Please install a newer version, or --unstrip will not work.\\n"; } Devel::PPPort::WriteFile(\$0); exit 0; } print <<END;
Sorry, but this is a stripped version of \$0.
To be able to use its original script and doc functionality, please try to regenerate this file using:
\$^X \$0 --unstripEND /ms; my($pl, $c) = $self =~ /(.*^__DATA__)(.*)/ms; $c =~ s{ / (?: \*[^*]*\*+(?:[^$ccs][^*]*\*+)* / | /[^\r\n]*) | ( "[^"\\]*(?:\\.[^"\\]*)*" | '[^'\\]*(?:\\.[^'\\]*)*' ) | ($HS+) }{ defined $2 ? ' ' : ($1 || '') }gsex; $c =~ s!\s+$!!mg; $c =~ s!^$LF!!mg; $c =~ s!^\s*#\s*!#!mg; $c =~ s!^\s+!!mg;
open OUT, ">$0" or die "cannot strip $0: $!\n";
print OUT "$pl$c\n";
exit 0;
}2 POD Errors
The following errors were encountered while parsing the POD:
- Around line 12:
Unknown directive: =provides
- Around line 14:
Unknown directive: =implementation