4 use File::Basename qw(basename dirname);
7 # List explicitly here the variables you want Configure to
8 # generate. Metaconfig only looks for shell variables, so you
9 # have to mention them as if they were shell variables, not
10 # %Config entries. Thus you write
12 # to ensure Configure will look for $Config{startperl}.
15 # This forces PL files to create target in same directory as PL file.
16 # This is so that make depend always knows where to find PL derivatives.
19 $file = basename($0, '.PL');
20 $file .= '.com' if $^O eq 'VMS';
22 open OUT,">$file" or die "Can't create $file: $!";
24 print "Extracting $file (with variable substitutions)\n";
26 # In this section, perl variables will be expanded during extraction.
27 # You can use $Config{...} to use Configure variables.
29 print OUT <<"!GROK!THIS!";
31 eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
32 if \$running_under_some_shell;
35 # In the following, perl variables are not expanded during extraction.
37 print OUT <<'!NO!SUBS!';
42 use File::Path qw(mkpath);
45 # Make sure read permissions for all are set:
46 if (defined umask && (umask() & 0444)) {
47 umask (umask() & ~0444);
51 use vars qw($opt_D $opt_d $opt_r $opt_l $opt_h $opt_a $opt_Q $opt_e);
52 die "-r and -a options are mutually exclusive\n" if ($opt_r and $opt_a);
53 my @inc_dirs = inc_dirs() if $opt_a;
57 my $Dest_dir = $opt_d || $Config{installsitearch};
58 die "Destination directory $Dest_dir doesn't exist or isn't a directory\n"
61 my @isatype = split(' ',<<END);
70 @isatype{@isatype} = (1) x @isatype;
75 @ARGV = ('-') unless @ARGV;
77 build_preamble_if_necessary();
86 my ($t, $tab, %curargs, $new, $eval_index, $dir, $name, $args, $outfile);
87 my ($incl, $incl_type, $next);
88 while (defined (my $file = next_file())) {
89 if (-l $file and -d $file) {
90 link_if_possible($file) if ($opt_l);
94 # Recover from header files with unbalanced cpp directives
98 # $eval_index goes into ``#line'' directives, to help locate syntax errors:
105 ($outfile = $file) =~ s/\.h$/.ph/ || next;
106 print "$file -> $outfile\n" unless $opt_Q;
107 if ($file =~ m|^(.*)/|) {
109 mkpath "$Dest_dir/$dir";
112 if ($opt_a) { # automagic mode: locate header file in @inc_dirs
113 foreach (@inc_dirs) {
119 open(IN,"$file") || (($Exit = 1),(warn "Can't open $file: $!\n"),next);
120 open(OUT,">$Dest_dir/$outfile") || die "Can't create $outfile: $!\n";
123 print OUT "require '_h2ph_pre.ph';\n\n";
125 while (defined (local $_ = next_line($file))) {
127 if (s/^define\s+(\w+)//) {
131 s/\(\w+\s*\(\*\)\s*\(\w*\)\)\s*(-?\d+)/$1/; # (int (*)(foo_t))0
132 if (s/^\(([\w,\s]*)\)//) {
137 foreach my $arg (split(/,\s*/,$args)) {
138 $arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/;
141 $args =~ s/\b(\w)/\$$1/g;
142 $args = "local($args) = \@_;\n$t ";
146 $new =~ s/(["\\])/\\$1/g; #"]);
147 $new = reindent($new);
148 $args = reindent($args);
150 $new =~ s/(['\\])/\\$1/g; #']);
153 "eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n";
157 "eval 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n";
160 print OUT "unless(defined(\&$name)) {\n sub $name $proto\{\n\t${args}eval q($new);\n }\n}\n";
166 $new = 1 if $new eq '';
167 $new = reindent($new);
168 $args = reindent($args);
170 $new =~ s/(['\\])/\\$1/g; #']);
173 print OUT $t,"eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name () {",$new,";}' unless defined(\&$name);\n";
176 print OUT $t,"eval 'sub $name () {",$new,";}' unless defined(\&$name);\n";
179 # Shunt around such directives as `#define FOO FOO':
180 next if " \&$name" eq $new;
182 print OUT $t,"unless(defined(\&$name)) {\n sub $name () {\t",$new,";}\n}\n";
185 } elsif (/^(include|import|include_next)\s*[<\"](.*)[>\"]/) {
188 if (($incl_type eq 'include_next') ||
189 ($opt_e && exists($bad_file{$incl}))) {
190 $incl =~ s/\.h$/.ph/;
194 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
195 print OUT ($t, "my(\@REM);\n");
196 if ($incl_type eq 'include_next') {
198 "my(\%INCD) = map { \$INC{\$_} => 1 } ",
199 "(grep { \$_ eq \"$incl\" } ",
202 "\@REM = map { \"\$_/$incl\" } ",
203 "(grep { not exists(\$INCD{\"\$_/$incl\"})",
204 " and -f \"\$_/$incl\" } \@INC);\n");
207 "\@REM = map { \"\$_/$incl\" } ",
208 "(grep {-r \"\$_/$incl\" } \@INC);\n");
211 "require \"\$REM[0]\" if \@REM;\n");
213 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
217 "warn(\$\@) if \$\@;\n");
219 $incl =~ s/\.h$/.ph/;
220 print OUT $t,"require '$incl';\n";
222 } elsif (/^ifdef\s+(\w+)/) {
223 print OUT $t,"if(defined(&$1)) {\n";
225 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
226 } elsif (/^ifndef\s+(\w+)/) {
227 print OUT $t,"unless(defined(&$1)) {\n";
229 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
230 } elsif (s/^if\s+//) {
235 print OUT $t,"if($new) {\n";
237 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
238 } elsif (s/^elif\s+//) {
244 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
245 print OUT $t,"}\n elsif($new) {\n";
247 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
250 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
251 print OUT $t,"} else {\n";
253 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
256 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
258 } elsif(/^undef\s+(\w+)/) {
259 print OUT $t, "undef(&$1) if defined(&$1);\n";
260 } elsif(/^error\s+(".*")/) {
261 print OUT $t, "die($1);\n";
262 } elsif(/^error\s+(.*)/) {
263 print OUT $t, "die(\"", quotemeta($1), "\");\n";
264 } elsif(/^warning\s+(.*)/) {
265 print OUT $t, "warn(\"", quotemeta($1), "\");\n";
266 } elsif(/^ident\s+(.*)/) {
267 print OUT $t, "# $1\n";
269 } elsif(/^\s*(typedef\s*)?enum\s*(\s+[a-zA-Z_]\w*\s*)?/) {
270 until(/\{[^}]*\}.*;/ || /;/) {
271 last unless defined ($next = next_line($file));
273 # drop "#define FOO FOO" in enums
274 $next =~ s/^\s*#\s*define\s+(\w+)\s+\1\s*$//;
276 print OUT "# $next\n" if $opt_D;
278 s/#\s*if.*?#\s*endif//g; # drop #ifdefs
281 next unless /^\s?(typedef\s?)?enum\s?([a-zA-Z_]\w*)?\s?\{(.*)\}\s?([a-zA-Z_]\w*)?\s?;/;
282 (my $enum_subs = $3) =~ s/\s//g;
283 my @enum_subs = split(/,/, $enum_subs);
285 foreach my $enum (@enum_subs) {
286 my ($enum_name, $enum_value) = $enum =~ /^([a-zA-Z_]\w*)(=.+)?$/;
287 $enum_value =~ s/^=//;
288 $enum_val = (length($enum_value) ? $enum_value : $enum_val + 1);
291 "eval(\"\\n#line $eval_index $outfile\\n",
292 "sub $enum_name () \{ $enum_val; \}\") ",
293 "unless defined(\&$enum_name);\n");
297 "eval(\"sub $enum_name () \{ $enum_val; \}\") ",
298 "unless defined(\&$enum_name);\n");
303 $Is_converted{$file} = 1;
304 if ($opt_e && exists($bad_file{$file})) {
305 unlink($Dest_dir . '/' . $outfile);
309 queue_includes_from($file) if ($opt_a);
313 if ($opt_e && (scalar(keys %bad_file) > 0)) {
314 warn "Was unable to convert the following files:\n";
315 warn "\t" . join("\n\t",sort(keys %bad_file)) . "\n";
323 $joined_args = join('|', keys(%curargs));
326 s/^\&\&// && do { $new .= " &&"; next;}; # handle && operator
327 s/^\&([\(a-z\)]+)/$1/i; # hack for things that take the address of
328 s/^(\s+)// && do {$new .= ' '; next;};
329 s/^0X([0-9A-F]+)[UL]*//i
332 if (length $hex > 8 && !$Config{use64bitint}) {
333 # Croak if nv_preserves_uv_bits < 64 ?
334 $new .= hex(substr($hex, -8)) +
335 2**32 * hex(substr($hex, 0, -8));
336 # The above will produce "errorneus" code
337 # if the hex constant was e.g. inside UINT64_C
338 # macro, but then again, h2ph is an approximation.
340 $new .= lc("0x$hex");
343 s/^(-?\d+\.\d+E[-+]?\d+)[FL]?//i && do {$new .= $1; next;};
344 s/^(\d+)\s*[LU]*//i && do {$new .= $1; next;};
345 s/^("(\\"|[^"])*")// && do {$new .= $1; next;};
346 s/^'((\\"|[^"])*)'// && do {
348 $new .= "ord('\$$1')";
354 # replace "sizeof(foo)" with "{foo}"
355 # also, remove * (C dereference operator) to avoid perl syntax
356 # problems. Where the %sizeof array comes from is anyone's
357 # guess (c2ph?), but this at least avoids fatal syntax errors.
358 # Behavior is undefined if sizeof() delimiters are unbalanced.
359 # This code was modified to able to handle constructs like this:
360 # sizeof(*(p)), which appear in the HP-UX 10.01 header files.
361 s/^sizeof\s*\(// && do {
363 my $lvl = 1; # already saw one open paren
364 # tack { on the front, and skip it in the loop
367 # find balanced closing paren
368 while ($index <= length($_) && $lvl > 0) {
369 $lvl++ if substr($_, $index, 1) eq "(";
370 $lvl-- if substr($_, $index, 1) eq ")";
373 # tack } on the end, replacing )
374 substr($_, $index - 1, 1) = "}";
375 # remove pesky * operators within the sizeof argument
376 substr($_, 0, $index - 1) =~ s/\*//g;
380 /\(([\w\s]+)[\*\s]*\)\s*[\w\(]/ && do {
381 foreach (split /\s+/, $1) { # Make sure all the words are types,
382 last unless ($isatype{$_} or $_ eq 'struct' or $_ eq 'union');
384 s/\([\w\s]+[\*\s]*\)// && next; # then eliminate them.
386 # struct/union member, including arrays:
387 s/^([_A-Z]\w*(\[[^\]]+\])?((\.|->)[_A-Z]\w*(\[[^\]]+\])?)+)//i && do {
389 $id =~ s/(\.|(->))([^\.\-]*)/->\{$3\}/g;
390 $id =~ s/\b([^\$])($joined_args)/$1\$$2/g if length($joined_args);
391 while($id =~ /\[\s*([^\$\&\d\]]+)\]/) {
394 if(exists($curargs{$index})) {
399 $id =~ s/\[\s*([^\$\&\d\]]+)\]/[$index]/;
403 s/^([_a-zA-Z]\w*)// && do {
405 if ($id eq 'struct' || $id eq 'union') {
409 } elsif ($id =~ /^((un)?signed)|(long)|(short)$/) {
410 while (s/^\s+(\w+)//) { $id .= ' ' . $1; }
415 $new .= '->' if /^[\[\{]/;
416 } elsif ($id eq 'defined') {
419 s/^\s*\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i; # cheat
421 } elsif ($isatype{$id}) {
422 if ($new =~ /{\s*$/) {
424 } elsif ($new =~ /\(\s*$/ && /^[\s*]*\)/) {
428 $new .= q(').$id.q(');
431 if ($inif && $new !~ /defined\s*\($/) {
432 $new .= '(defined(&' . $id . ') ? &' . $id . ' : 0)';
441 s/^(.)// && do { if ($1 ne '#') { $new .= $1; } next;};
450 my $pre_sub_tri_graphs = 1;
452 READ: while (not eof IN) {
455 next unless length $in;
458 if ($pre_sub_tri_graphs) {
459 # Preprocess all tri-graphs
460 # including things stuck in quoted string constants.
461 $in =~ s/\?\?=/#/g; # | ??=| #|
462 $in =~ s/\?\?\!/|/g; # | ??!| ||
463 $in =~ s/\?\?'/^/g; # | ??'| ^|
464 $in =~ s/\?\?\(/[/g; # | ??(| [|
465 $in =~ s/\?\?\)/]/g; # | ??)| ]|
466 $in =~ s/\?\?\-/~/g; # | ??-| ~|
467 $in =~ s/\?\?\//\\/g; # | ??/| \|
468 $in =~ s/\?\?</{/g; # | ??<| {|
469 $in =~ s/\?\?>/}/g; # | ??>| }|
471 if ($in =~ /^\#ifdef __LANGUAGE_PASCAL__/) {
472 # Tru64 disassembler.h evilness: mixed C and Pascal.
478 if ($in =~ /^extern inline / && # Inlined assembler.
479 $^O eq 'linux' && $file =~ m!(?:^|/)asm/[^/]+\.h$!) {
485 if ($in =~ s/\\$//) { # \-newline
488 } elsif ($in =~ s/^([^"'\\\/]+)//) { # Passthrough
490 } elsif ($in =~ s/^(\\.)//) { # \...
492 } elsif ($in =~ s/^('(\\.|[^'\\])*')//) { # '...
494 } elsif ($in =~ s/^("(\\.|[^"\\])*")//) { # "...
496 } elsif ($in =~ s/^\/\/.*//) { # //...
498 } elsif ($in =~ m/^\/\*/) { # /*...
499 # C comment removal adapted from perlfaq6:
500 if ($in =~ s/^\/\*[^*]*\*+([^\/*][^*]*\*+)*\///) {
502 } else { # Incomplete /* */
505 } elsif ($in =~ s/^(\/)//) { # /...
507 } elsif ($in =~ s/^([^\'\"\\\/]+)//) {
509 } elsif ($^O eq 'linux' &&
510 $file =~ m!(?:^|/)linux/byteorder/pdp_endian\.h$! &&
511 $in =~ s!\'T KNOW!!) {
512 $out =~ s!I DON$!I_DO_NOT_KNOW!;
515 warn "Cannot parse $file:\n$in\n";
516 $bad_file{$file} = 1;
521 die "Cannot parse:\n$in\n";
526 last READ if $out =~ /\S/;
533 # Handle recursive subdirectories without getting a grotesquely big stack.
534 # Could this be implemented using File::Find?
542 if ($file eq '-' or -f $file or -l $file) {
548 print STDERR "Skipping directory `$file'\n";
553 print STDERR "Skipping `$file': not a file or directory\n";
561 # Put all the files in $directory into @ARGV for processing.
564 my ($directory) = @_;
566 $directory =~ s:/$::;
568 opendir DIR, $directory;
569 foreach (readdir DIR) {
570 next if ($_ eq '.' or $_ eq '..');
572 # expand_glob() is going to be called until $ARGV[0] isn't a
573 # directory; so push directories, and unshift everything else.
574 if (-d "$directory/$_") { push @ARGV, "$directory/$_" }
575 else { unshift @ARGV, "$directory/$_" }
581 # Given $file, a symbolic link to a directory in the C include directory,
582 # make an equivalent symbolic link in $Dest_dir, if we can figure out how.
583 # Otherwise, just duplicate the file or directory.
587 my $target = eval 'readlink($dirlink)';
589 if ($target =~ m:^\.\./: or $target =~ m:^/:) {
590 # The target of a parent or absolute link could leave the $Dest_dir
591 # hierarchy, so let's put all of the contents of $dirlink (actually,
592 # the contents of $target) into @ARGV; as a side effect down the
593 # line, $dirlink will get created as an _actual_ directory.
594 expand_glob($dirlink);
596 if (-l "$Dest_dir/$dirlink") {
597 unlink "$Dest_dir/$dirlink" or
598 print STDERR "Could not remove link $Dest_dir/$dirlink: $!\n";
601 if (eval 'symlink($target, "$Dest_dir/$dirlink")') {
602 print "Linking $target -> $Dest_dir/$dirlink\n";
604 # Make sure that the link _links_ to something:
605 if (! -e "$Dest_dir/$target") {
606 mkpath("$Dest_dir/$target", 0755) or
607 print STDERR "Could not create $Dest_dir/$target/\n";
610 print STDERR "Could not symlink $target -> $Dest_dir/$dirlink: $!\n";
616 # Push all #included files in $file onto our stack, except for STDIN
617 # and files we've already processed.
618 sub queue_includes_from
623 return if ($file eq "-");
625 open HEADER, $file or return;
626 while (defined($line = <HEADER>)) {
627 while (/\\$/) { # Handle continuation lines
632 if ($line =~ /^#\s*include\s+<(.*?)>/) {
633 push(@ARGV, $1) unless $Is_converted{$1};
640 # Determine include directories; $Config{usrinc} should be enough for (all
641 # non-GCC?) C compilers, but gcc uses an additional include directory.
644 my $from_gcc = `$Config{cc} -v 2>&1`;
645 $from_gcc =~ s:^Reading specs from (.*?)/specs\b.*:$1/include:s;
647 length($from_gcc) ? ($from_gcc, $Config{usrinc}) : ($Config{usrinc});
651 # Create "_h2ph_pre.ph", if it doesn't exist or was built by a different
653 sub build_preamble_if_necessary
655 # Increment $VERSION every time this function is modified:
657 my $preamble = "$Dest_dir/_h2ph_pre.ph";
659 # Can we skip building the preamble file?
661 # Extract version number from first line of preamble:
662 open PREAMBLE, $preamble or die "Cannot open $preamble: $!";
663 my $line = <PREAMBLE>;
664 $line =~ /(\b\d+\b)/;
665 close PREAMBLE or die "Cannot close $preamble: $!";
667 # Don't build preamble if a compatible preamble exists:
668 return if $1 == $VERSION;
671 my (%define) = _extract_cc_defines();
673 open PREAMBLE, ">$preamble" or die "Cannot open $preamble: $!";
674 print PREAMBLE "# This file was created by h2ph version $VERSION\n";
676 foreach (sort keys %define) {
678 print PREAMBLE "# $_=$define{$_}\n";
681 if ($define{$_} =~ /^(\d+)U?L{0,2}$/i) {
683 "unless (defined &$_) { sub $_() { $1 } }\n\n";
684 } elsif ($define{$_} =~ /^\w+$/) {
686 "unless (defined &$_) { sub $_() { &$define{$_} } }\n\n";
689 "unless (defined &$_) { sub $_() { \"",
690 quotemeta($define{$_}), "\" } }\n\n";
693 close PREAMBLE or die "Cannot close $preamble: $!";
697 # %Config contains information on macros that are pre-defined by the
698 # system's compiler. We need this information to make the .ph files
699 # function with perl as the .h files do with cc.
700 sub _extract_cc_defines
703 my $allsymbols = join " ",
704 @Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'};
706 # Split compiler pre-definitions into `key=value' pairs:
707 foreach (split /\s+/, $allsymbols) {
708 /(.+?)=(.+)/ and $define{$1} = $2;
711 print STDERR "$_: $1 -> $2\n";
721 ##############################################################################
726 h2ph - convert .h C header files to .ph Perl header files
730 B<h2ph [-d destination directory] [-r | -a] [-l] [headerfiles]>
735 converts any C header files specified to the corresponding Perl header file
737 It is most easily run while in /usr/include:
739 cd /usr/include; h2ph * sys/*
743 cd /usr/include; h2ph * sys/* arpa/* netinet/*
747 cd /usr/include; h2ph -r -l .
749 The output files are placed in the hierarchy rooted at Perl's
750 architecture dependent library directory. You can specify a different
751 hierarchy with a B<-d> switch.
753 If run with no arguments, filters standard input to standard output.
759 =item -d destination_dir
761 Put the resulting B<.ph> files beneath B<destination_dir>, instead of
762 beneath the default Perl library location (C<$Config{'installsitsearch'}>).
766 Run recursively; if any of B<headerfiles> are directories, then run I<h2ph>
767 on all files in those directories (and their subdirectories, etc.). B<-r>
768 and B<-a> are mutually exclusive.
772 Run automagically; convert B<headerfiles>, as well as any B<.h> files
773 which they include. This option will search for B<.h> files in all
774 directories which your C compiler ordinarily uses. B<-a> and B<-r> are
779 Symbolic links will be replicated in the destination directory. If B<-l>
780 is not specified, then links are skipped over.
784 Put ``hints'' in the .ph files which will help in locating problems with
785 I<h2ph>. In those cases when you B<require> a B<.ph> file containing syntax
786 errors, instead of the cryptic
788 [ some error condition ] at (eval mmm) line nnn
790 you will see the slightly more helpful
792 [ some error condition ] at filename.ph line nnn
794 However, the B<.ph> files almost double in size when built using B<-h>.
798 Include the code from the B<.h> file as a comment in the B<.ph> file.
799 This is primarily used for debugging I<h2ph>.
803 ``Quiet'' mode; don't print out the names of the files being converted.
809 No environment variables are used.
828 The usual warnings if it can't read or write the files involved.
832 Doesn't construct the %sizeof array for you.
834 It doesn't handle all C constructs, but it does attempt to isolate
835 definitions inside evals so that you can get at the definitions
836 that it can translate.
838 It's only intended as a rough tool.
839 You may need to dicker with the files produced.
841 You have to run this program by hand; it's not run as part of the Perl
844 Doesn't handle complicated expressions built piecemeal, a la:
854 Doesn't necessarily locate all of your C compiler's internally-defined
861 close OUT or die "Can't close $file: $!";
862 chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
863 exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';