1#!/usr/local/bin/perl
2
3use Config;
4use File::Basename qw(basename dirname);
5use Cwd;
6
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
11#  $startperl
12# to ensure Configure will look for $Config{startperl}.
13# Wanted:  $archlibexp
14
15# This forces PL files to create target in same directory as PL file.
16# This is so that make depend always knows where to find PL derivatives.
17$origdir = cwd;
18chdir dirname($0);
19$file = basename($0, '.PL');
20$file .= '.com' if $^O eq 'VMS';
21
22open OUT,">$file" or die "Can't create $file: $!";
23
24print "Extracting $file (with variable substitutions)\n";
25
26# In this section, perl variables will be expanded during extraction.
27# You can use $Config{...} to use Configure variables.
28
29print OUT <<"!GROK!THIS!";
30$Config{startperl}
31    eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
32	if \$running_under_some_shell;
33!GROK!THIS!
34
35# In the following, perl variables are not expanded during extraction.
36
37print OUT <<'!NO!SUBS!';
38
39use strict;
40
41use Config;
42use File::Path qw(mkpath);
43use Getopt::Std;
44
45# Make sure read permissions for all are set:
46if (defined umask && (umask() & 0444)) {
47    umask (umask() & ~0444);
48}
49
50getopts('Dd:rlhaQe');
51use vars qw($opt_D $opt_d $opt_r $opt_l $opt_h $opt_a $opt_Q $opt_e);
52die "-r and -a options are mutually exclusive\n" if ($opt_r and $opt_a);
53my @inc_dirs = inc_dirs() if $opt_a;
54
55my $Exit = 0;
56
57my $Dest_dir = $opt_d || $Config{installsitearch};
58die "Destination directory $Dest_dir doesn't exist or isn't a directory\n"
59    unless -d $Dest_dir;
60
61my @isatype = split(' ',<<END);
62	char	uchar	u_char
63	short	ushort	u_short
64	int	uint	u_int
65	long	ulong	u_long
66	FILE	key_t	caddr_t
67END
68
69my %isatype;
70@isatype{@isatype} = (1) x @isatype;
71my $inif = 0;
72my %Is_converted;
73my %bad_file = ();
74
75@ARGV = ('-') unless @ARGV;
76
77build_preamble_if_necessary();
78
79sub reindent($) {
80    my($text) = shift;
81    $text =~ s/\n/\n    /g;
82    $text =~ s/        /\t/g;
83    $text;
84}
85
86my ($t, $tab, %curargs, $new, $eval_index, $dir, $name, $args, $outfile);
87my ($incl, $incl_type, $next);
88while (defined (my $file = next_file())) {
89    if (-l $file and -d $file) {
90        link_if_possible($file) if ($opt_l);
91        next;
92    }
93
94    # Recover from header files with unbalanced cpp directives
95    $t = '';
96    $tab = 0;
97
98    # $eval_index goes into ``#line'' directives, to help locate syntax errors:
99    $eval_index = 1;
100
101    if ($file eq '-') {
102	open(IN, "-");
103	open(OUT, ">-");
104    } else {
105	($outfile = $file) =~ s/\.h$/.ph/ || next;
106	print "$file -> $outfile\n" unless $opt_Q;
107	if ($file =~ m|^(.*)/|) {
108	    $dir = $1;
109	    mkpath "$Dest_dir/$dir";
110	}
111
112	if ($opt_a) { # automagic mode:  locate header file in @inc_dirs
113	    foreach (@inc_dirs) {
114		chdir $_;
115		last if -f $file;
116	    }
117	}
118
119	open(IN,"$file") || (($Exit = 1),(warn "Can't open $file: $!\n"),next);
120	open(OUT,">$Dest_dir/$outfile") || die "Can't create $outfile: $!\n";
121    }
122
123    print OUT
124        "require '_h2ph_pre.ph';\n\n",
125        "no warnings 'redefine';\n\n";
126
127    while (defined (local $_ = next_line($file))) {
128	if (s/^\s*\#\s*//) {
129	    if (s/^define\s+(\w+)//) {
130		$name = $1;
131		$new = '';
132		s/\s+$//;
133		s/\(\w+\s*\(\*\)\s*\(\w*\)\)\s*(-?\d+)/$1/; # (int (*)(foo_t))0
134		if (s/^\(([\w,\s]*)\)//) {
135		    $args = $1;
136    	    	    my $proto = '() ';
137		    if ($args ne '') {
138    	    	    	$proto = '';
139			foreach my $arg (split(/,\s*/,$args)) {
140			    $arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/;
141			    $curargs{$arg} = 1;
142			}
143			$args =~ s/\b(\w)/\$$1/g;
144			$args = "local($args) = \@_;\n$t    ";
145		    }
146		    s/^\s+//;
147		    expr();
148		    $new =~ s/(["\\])/\\$1/g;       #"]);
149		    $new = reindent($new);
150		    $args = reindent($args);
151		    if ($t ne '') {
152			$new =~ s/(['\\])/\\$1/g;   #']);
153			if ($opt_h) {
154			    print OUT $t,
155                            "eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name $proto\{\n$t    ${args}eval q($new);\n$t}' unless defined(\&$name);\n";
156                            $eval_index++;
157			} else {
158			    print OUT $t,
159                            "eval 'sub $name $proto\{\n$t    ${args}eval q($new);\n$t}' unless defined(\&$name);\n";
160			}
161		    } else {
162                      print OUT "unless(defined(\&$name)) {\n    sub $name $proto\{\n\t${args}eval q($new);\n    }\n}\n";
163		    }
164		    %curargs = ();
165		} else {
166		    s/^\s+//;
167		    expr();
168		    $new = 1 if $new eq '';
169		    $new = reindent($new);
170		    $args = reindent($args);
171		    if ($t ne '') {
172			$new =~ s/(['\\])/\\$1/g;        #']);
173
174			if ($opt_h) {
175			    print OUT $t,"eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name () {",$new,";}' unless defined(\&$name);\n";
176			    $eval_index++;
177			} else {
178			    print OUT $t,"eval 'sub $name () {",$new,";}' unless defined(\&$name);\n";
179			}
180		    } else {
181		    	# Shunt around such directives as `#define FOO FOO':
182		    	next if " \&$name" eq $new;
183
184                      print OUT $t,"unless(defined(\&$name)) {\n    sub $name () {\t",$new,";}\n}\n";
185		    }
186		}
187	    } elsif (/^(include|import|include_next)\s*[<\"](.*)[>\"]/) {
188                $incl_type = $1;
189                $incl = $2;
190                if (($incl_type eq 'include_next') ||
191                    ($opt_e && exists($bad_file{$incl}))) {
192                    $incl =~ s/\.h$/.ph/;
193		print OUT ($t,
194			   "eval {\n");
195                $tab += 4;
196                $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
197                    print OUT ($t, "my(\@REM);\n");
198                    if ($incl_type eq 'include_next') {
199		print OUT ($t,
200			   "my(\%INCD) = map { \$INC{\$_} => 1 } ",
201			           "(grep { \$_ eq \"$incl\" } ",
202                                   "keys(\%INC));\n");
203		print OUT ($t,
204			           "\@REM = map { \"\$_/$incl\" } ",
205			   "(grep { not exists(\$INCD{\"\$_/$incl\"})",
206			           " and -f \"\$_/$incl\" } \@INC);\n");
207                    } else {
208                        print OUT ($t,
209                                   "\@REM = map { \"\$_/$incl\" } ",
210                                   "(grep {-r \"\$_/$incl\" } \@INC);\n");
211                    }
212		print OUT ($t,
213			   "require \"\$REM[0]\" if \@REM;\n");
214                $tab -= 4;
215                $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
216                print OUT ($t,
217			   "};\n");
218		print OUT ($t,
219			   "warn(\$\@) if \$\@;\n");
220                } else {
221                    $incl =~ s/\.h$/.ph/;
222		    print OUT $t,"require '$incl';\n";
223                }
224	    } elsif (/^ifdef\s+(\w+)/) {
225		print OUT $t,"if(defined(&$1)) {\n";
226		$tab += 4;
227		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
228	    } elsif (/^ifndef\s+(\w+)/) {
229		print OUT $t,"unless(defined(&$1)) {\n";
230		$tab += 4;
231		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
232	    } elsif (s/^if\s+//) {
233		$new = '';
234		$inif = 1;
235		expr();
236		$inif = 0;
237		print OUT $t,"if($new) {\n";
238		$tab += 4;
239		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
240	    } elsif (s/^elif\s+//) {
241		$new = '';
242		$inif = 1;
243		expr();
244		$inif = 0;
245		$tab -= 4;
246		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
247		print OUT $t,"}\n elsif($new) {\n";
248		$tab += 4;
249		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
250	    } elsif (/^else/) {
251		$tab -= 4;
252		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
253		print OUT $t,"} else {\n";
254		$tab += 4;
255		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
256	    } elsif (/^endif/) {
257		$tab -= 4;
258		$t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
259		print OUT $t,"}\n";
260	    } elsif(/^undef\s+(\w+)/) {
261		print OUT $t, "undef(&$1) if defined(&$1);\n";
262	    } elsif(/^error\s+(".*")/) {
263		print OUT $t, "die($1);\n";
264	    } elsif(/^error\s+(.*)/) {
265		print OUT $t, "die(\"", quotemeta($1), "\");\n";
266	    } elsif(/^warning\s+(.*)/) {
267		print OUT $t, "warn(\"", quotemeta($1), "\");\n";
268	    } elsif(/^ident\s+(.*)/) {
269		print OUT $t, "# $1\n";
270	    }
271	} elsif(/^\s*(typedef\s*)?enum\s*(\s+[a-zA-Z_]\w*\s*)?/) {
272	    until(/\{[^}]*\}.*;/ || /;/) {
273		last unless defined ($next = next_line($file));
274		chomp $next;
275		# drop "#define FOO FOO" in enums
276		$next =~ s/^\s*#\s*define\s+(\w+)\s+\1\s*$//;
277		$_ .= $next;
278		print OUT "# $next\n" if $opt_D;
279	    }
280	    s/#\s*if.*?#\s*endif//g; # drop #ifdefs
281	    s@/\*.*?\*/@@g;
282	    s/\s+/ /g;
283	    next unless /^\s?(typedef\s?)?enum\s?([a-zA-Z_]\w*)?\s?\{(.*)\}\s?([a-zA-Z_]\w*)?\s?;/;
284	    (my $enum_subs = $3) =~ s/\s//g;
285	    my @enum_subs = split(/,/, $enum_subs);
286	    my $enum_val = -1;
287	    foreach my $enum (@enum_subs) {
288		my ($enum_name, $enum_value) = $enum =~ /^([a-zA-Z_]\w*)(=.+)?$/;
289		$enum_value =~ s/^=//;
290		$enum_val = (length($enum_value) ? $enum_value : $enum_val + 1);
291		if ($opt_h) {
292		    print OUT ($t,
293			       "eval(\"\\n#line $eval_index $outfile\\n",
294			       "sub $enum_name () \{ $enum_val; \}\") ",
295			       "unless defined(\&$enum_name);\n");
296		    ++ $eval_index;
297		} else {
298		    print OUT ($t,
299			       "eval(\"sub $enum_name () \{ $enum_val; \}\") ",
300			       "unless defined(\&$enum_name);\n");
301		}
302	    }
303	}
304    }
305    $Is_converted{$file} = 1;
306    if ($opt_e && exists($bad_file{$file})) {
307        unlink($Dest_dir . '/' . $outfile);
308        $next = '';
309    } else {
310        print OUT "1;\n";
311    queue_includes_from($file) if ($opt_a);
312    }
313}
314
315if ($opt_e && (scalar(keys %bad_file) > 0)) {
316    warn "Was unable to convert the following files:\n";
317    warn "\t" . join("\n\t",sort(keys %bad_file)) . "\n";
318}
319
320exit $Exit;
321
322sub expr {
323    my $joined_args;
324    if(keys(%curargs)) {
325	$joined_args = join('|', keys(%curargs));
326    }
327    while ($_ ne '') {
328	s/^\&\&// && do { $new .= " &&"; next;}; # handle && operator
329	s/^\&([\(a-z\)]+)/$1/i;	# hack for things that take the address of
330	s/^(\s+)//		&& do {$new .= ' '; next;};
331	s/^0X([0-9A-F]+)[UL]*//i
332	    && do {my $hex = $1;
333		   $hex =~ s/^0+//;
334		   if (length $hex > 8 && !$Config{use64bitint}) {
335		       # Croak if nv_preserves_uv_bits < 64 ?
336		       $new .=         hex(substr($hex, -8)) +
337			       2**32 * hex(substr($hex,  0, -8));
338		       # The above will produce "errorneus" code
339		       # if the hex constant was e.g. inside UINT64_C
340		       # macro, but then again, h2ph is an approximation.
341		   } else {
342		       $new .= lc("0x$hex");
343		   }
344		   next;};
345	s/^(-?\d+\.\d+E[-+]?\d+)[FL]?//i	&& do {$new .= $1; next;};
346	s/^(\d+)\s*[LU]*//i	&& do {$new .= $1; next;};
347	s/^("(\\"|[^"])*")//	&& do {$new .= $1; next;};
348	s/^'((\\"|[^"])*)'//	&& do {
349	    if ($curargs{$1}) {
350		$new .= "ord('\$$1')";
351	    } else {
352		$new .= "ord('$1')";
353	    }
354	    next;
355	};
356        # replace "sizeof(foo)" with "{foo}"
357        # also, remove * (C dereference operator) to avoid perl syntax
358        # problems.  Where the %sizeof array comes from is anyone's
359        # guess (c2ph?), but this at least avoids fatal syntax errors.
360        # Behavior is undefined if sizeof() delimiters are unbalanced.
361        # This code was modified to able to handle constructs like this:
362        #   sizeof(*(p)), which appear in the HP-UX 10.01 header files.
363        s/^sizeof\s*\(// && do {
364            $new .= '$sizeof';
365            my $lvl = 1;  # already saw one open paren
366            # tack { on the front, and skip it in the loop
367            $_ = "{" . "$_";
368            my $index = 1;
369            # find balanced closing paren
370            while ($index <= length($_) && $lvl > 0) {
371                $lvl++ if substr($_, $index, 1) eq "(";
372                $lvl-- if substr($_, $index, 1) eq ")";
373                $index++;
374            }
375            # tack } on the end, replacing )
376            substr($_, $index - 1, 1) = "}";
377            # remove pesky * operators within the sizeof argument
378            substr($_, 0, $index - 1) =~ s/\*//g;
379            next;
380        };
381	# Eliminate typedefs
382	/\(([\w\s]+)[\*\s]*\)\s*[\w\(]/ && do {
383	    foreach (split /\s+/, $1) {  # Make sure all the words are types,
384		last unless ($isatype{$_} or $_ eq 'struct' or $_ eq 'union');
385	    }
386	    s/\([\w\s]+[\*\s]*\)// && next;      # then eliminate them.
387	};
388	# struct/union member, including arrays:
389	s/^([_A-Z]\w*(\[[^\]]+\])?((\.|->)[_A-Z]\w*(\[[^\]]+\])?)+)//i && do {
390	    my $id = $1;
391	    $id =~ s/(\.|(->))([^\.\-]*)/->\{$3\}/g;
392	    $id =~ s/\b([^\$])($joined_args)/$1\$$2/g if length($joined_args);
393	    while($id =~ /\[\s*([^\$\&\d\]]+)\]/) {
394		my($index) = $1;
395		$index =~ s/\s//g;
396		if(exists($curargs{$index})) {
397		    $index = "\$$index";
398		} else {
399		    $index = "&$index";
400		}
401		$id =~ s/\[\s*([^\$\&\d\]]+)\]/[$index]/;
402	    }
403	    $new .= " (\$$id)";
404	};
405	s/^([_a-zA-Z]\w*)//	&& do {
406	    my $id = $1;
407	    if ($id eq 'struct' || $id eq 'union') {
408		s/^\s+(\w+)//;
409		$id .= ' ' . $1;
410		$isatype{$id} = 1;
411	    } elsif ($id =~ /^((un)?signed)|(long)|(short)$/) {
412		while (s/^\s+(\w+)//) { $id .= ' ' . $1; }
413		$isatype{$id} = 1;
414	    }
415	    if ($curargs{$id}) {
416		$new .= "\$$id";
417		$new .= '->' if /^[\[\{]/;
418	    } elsif ($id eq 'defined') {
419		$new .= 'defined';
420	    } elsif (/^\s*\(/) {
421		s/^\s*\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i;	# cheat
422		$new .= " &$id";
423	    } elsif ($isatype{$id}) {
424		if ($new =~ /{\s*$/) {
425		    $new .= "'$id'";
426		} elsif ($new =~ /\(\s*$/ && /^[\s*]*\)/) {
427		    $new =~ s/\(\s*$//;
428		    s/^[\s*]*\)//;
429		} else {
430		    $new .= q(').$id.q(');
431		}
432	    } else {
433		if ($inif && $new !~ /defined\s*\($/) {
434		    $new .= '(defined(&' . $id . ') ? &' . $id . ' : 0)';
435		} elsif (/^\[/) {
436		    $new .= " \$$id";
437		} else {
438		    $new .= ' &' . $id;
439		}
440	    }
441	    next;
442	};
443	s/^(.)// && do { if ($1 ne '#') { $new .= $1; } next;};
444    }
445}
446
447
448sub next_line
449{
450    my $file = shift;
451    my ($in, $out);
452    my $pre_sub_tri_graphs = 1;
453
454    READ: while (not eof IN) {
455        $in  .= <IN>;
456        chomp $in;
457        next unless length $in;
458
459        while (length $in) {
460            if ($pre_sub_tri_graphs) {
461                # Preprocess all tri-graphs
462                # including things stuck in quoted string constants.
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;                       # | ??/|  \|
470                $in =~ s/\?\?</{/g;                         # | ??<|  {|
471                $in =~ s/\?\?>/}/g;                         # | ??>|  }|
472            }
473	    if ($in =~ /^\#ifdef __LANGUAGE_PASCAL__/) {
474                # Tru64 disassembler.h evilness: mixed C and Pascal.
475		while (<IN>) {
476		    last if /^\#endif/;
477		}
478		next READ;
479	    }
480	    if ($in =~ /^extern inline / && # Inlined assembler.
481		$^O eq 'linux' && $file =~ m!(?:^|/)asm/[^/]+\.h$!) {
482 		while (<IN>) {
483		    last if /^}/;
484		}
485		next READ;
486	    }
487            if ($in =~ s/\\$//) {                           # \-newline
488                $out    .= ' ';
489                next READ;
490            } elsif ($in =~ s/^([^"'\\\/]+)//) {            # Passthrough
491                $out    .= $1;
492            } elsif ($in =~ s/^(\\.)//) {                   # \...
493                $out    .= $1;
494            } elsif ($in =~ /^'/) {                         # '...
495                if ($in =~ s/^('(\\.|[^'\\])*')//) {
496                    $out    .= $1;
497                } else {
498                    next READ;
499                }
500            } elsif ($in =~ /^"/) {                         # "...
501                if ($in =~ s/^("(\\.|[^"\\])*")//) {
502                    $out    .= $1;
503                } else {
504                    next READ;
505                }
506            } elsif ($in =~ s/^\/\/.*//) {                  # //...
507                # fall through
508            } elsif ($in =~ m/^\/\*/) {                     # /*...
509                # C comment removal adapted from perlfaq6:
510                if ($in =~ s/^\/\*[^*]*\*+([^\/*][^*]*\*+)*\///) {
511                    $out    .= ' ';
512                } else {                                    # Incomplete /* */
513                    next READ;
514                }
515            } elsif ($in =~ s/^(\/)//) {                    # /...
516                $out    .= $1;
517            } elsif ($in =~ s/^([^\'\"\\\/]+)//) {
518                $out    .= $1;
519            } elsif ($^O eq 'linux' &&
520                     $file =~ m!(?:^|/)linux/byteorder/pdp_endian\.h$! &&
521                     $in   =~ s!\'T KNOW!!) {
522                $out    =~ s!I DON$!I_DO_NOT_KNOW!;
523            } else {
524                if ($opt_e) {
525                    warn "Cannot parse $file:\n$in\n";
526                    $bad_file{$file} = 1;
527                    $in = '';
528                    $out = undef;
529                    last READ;
530                } else {
531		die "Cannot parse:\n$in\n";
532                }
533            }
534        }
535
536        last READ if $out =~ /\S/;
537    }
538
539    return $out;
540}
541
542
543# Handle recursive subdirectories without getting a grotesquely big stack.
544# Could this be implemented using File::Find?
545sub next_file
546{
547    my $file;
548
549    while (@ARGV) {
550        $file = shift @ARGV;
551
552        if ($file eq '-' or -f $file or -l $file) {
553            return $file;
554        } elsif (-d $file) {
555            if ($opt_r) {
556                expand_glob($file);
557            } else {
558                print STDERR "Skipping directory `$file'\n";
559            }
560        } elsif ($opt_a) {
561            return $file;
562        } else {
563            print STDERR "Skipping `$file':  not a file or directory\n";
564        }
565    }
566
567    return undef;
568}
569
570
571# Put all the files in $directory into @ARGV for processing.
572sub expand_glob
573{
574    my ($directory)  = @_;
575
576    $directory =~ s:/$::;
577
578    opendir DIR, $directory;
579        foreach (readdir DIR) {
580            next if ($_ eq '.' or $_ eq '..');
581
582            # expand_glob() is going to be called until $ARGV[0] isn't a
583            # directory; so push directories, and unshift everything else.
584            if (-d "$directory/$_") { push    @ARGV, "$directory/$_" }
585            else                    { unshift @ARGV, "$directory/$_" }
586        }
587    closedir DIR;
588}
589
590
591# Given $file, a symbolic link to a directory in the C include directory,
592# make an equivalent symbolic link in $Dest_dir, if we can figure out how.
593# Otherwise, just duplicate the file or directory.
594sub link_if_possible
595{
596    my ($dirlink)  = @_;
597    my $target  = eval 'readlink($dirlink)';
598
599    if ($target =~ m:^\.\./: or $target =~ m:^/:) {
600        # The target of a parent or absolute link could leave the $Dest_dir
601        # hierarchy, so let's put all of the contents of $dirlink (actually,
602        # the contents of $target) into @ARGV; as a side effect down the
603        # line, $dirlink will get created as an _actual_ directory.
604        expand_glob($dirlink);
605    } else {
606        if (-l "$Dest_dir/$dirlink") {
607            unlink "$Dest_dir/$dirlink" or
608                print STDERR "Could not remove link $Dest_dir/$dirlink:  $!\n";
609        }
610
611        if (eval 'symlink($target, "$Dest_dir/$dirlink")') {
612            print "Linking $target -> $Dest_dir/$dirlink\n";
613
614            # Make sure that the link _links_ to something:
615            if (! -e "$Dest_dir/$target") {
616                mkpath("$Dest_dir/$target", 0755) or
617                    print STDERR "Could not create $Dest_dir/$target/\n";
618            }
619        } else {
620            print STDERR "Could not symlink $target -> $Dest_dir/$dirlink:  $!\n";
621        }
622    }
623}
624
625
626# Push all #included files in $file onto our stack, except for STDIN
627# and files we've already processed.
628sub queue_includes_from
629{
630    my ($file)    = @_;
631    my $line;
632
633    return if ($file eq "-");
634
635    open HEADER, $file or return;
636        while (defined($line = <HEADER>)) {
637            while (/\\$/) { # Handle continuation lines
638                chop $line;
639                $line .= <HEADER>;
640            }
641
642            if ($line =~ /^#\s*include\s+<(.*?)>/) {
643                push(@ARGV, $1) unless $Is_converted{$1};
644            }
645        }
646    close HEADER;
647}
648
649
650# Determine include directories; $Config{usrinc} should be enough for (all
651# non-GCC?) C compilers, but gcc uses an additional include directory.
652sub inc_dirs
653{
654    my $from_gcc    = `$Config{cc} -v 2>&1`;
655    $from_gcc       =~ s:^Reading specs from (.*?)/specs\b.*:$1/include:s;
656
657    length($from_gcc) ? ($from_gcc, $Config{usrinc}) : ($Config{usrinc});
658}
659
660
661# Create "_h2ph_pre.ph", if it doesn't exist or was built by a different
662# version of h2ph.
663sub build_preamble_if_necessary
664{
665    # Increment $VERSION every time this function is modified:
666    my $VERSION     = 2;
667    my $preamble    = "$Dest_dir/_h2ph_pre.ph";
668
669    # Can we skip building the preamble file?
670    if (-r $preamble) {
671        # Extract version number from first line of preamble:
672        open  PREAMBLE, $preamble or die "Cannot open $preamble:  $!";
673            my $line = <PREAMBLE>;
674            $line =~ /(\b\d+\b)/;
675        close PREAMBLE            or die "Cannot close $preamble:  $!";
676
677        # Don't build preamble if a compatible preamble exists:
678        return if $1 == $VERSION;
679    }
680
681    my (%define) = _extract_cc_defines();
682
683    open  PREAMBLE, ">$preamble" or die "Cannot open $preamble:  $!";
684        print PREAMBLE "# This file was created by h2ph version $VERSION\n";
685
686        foreach (sort keys %define) {
687            if ($opt_D) {
688                print PREAMBLE "# $_=$define{$_}\n";
689            }
690
691            if ($define{$_} =~ /^(\d+)U?L{0,2}$/i) {
692                print PREAMBLE
693                    "unless (defined &$_) { sub $_() { $1 } }\n\n";
694            } elsif ($define{$_} =~ /^\w+$/) {
695                print PREAMBLE
696                    "unless (defined &$_) { sub $_() { &$define{$_} } }\n\n";
697            } else {
698                print PREAMBLE
699                    "unless (defined &$_) { sub $_() { \"",
700                    quotemeta($define{$_}), "\" } }\n\n";
701            }
702        }
703    close PREAMBLE               or die "Cannot close $preamble:  $!";
704}
705
706
707# %Config contains information on macros that are pre-defined by the
708# system's compiler.  We need this information to make the .ph files
709# function with perl as the .h files do with cc.
710sub _extract_cc_defines
711{
712    my %define;
713    my $allsymbols  = join " ",
714        @Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'};
715
716    # Split compiler pre-definitions into `key=value' pairs:
717    foreach (split /\s+/, $allsymbols) {
718        /(.+?)=(.+)/ and $define{$1} = $2;
719
720        if ($opt_D) {
721            print STDERR "$_:  $1 -> $2\n";
722        }
723    }
724
725    return %define;
726}
727
728
7291;
730
731##############################################################################
732__END__
733
734=head1 NAME
735
736h2ph - convert .h C header files to .ph Perl header files
737
738=head1 SYNOPSIS
739
740B<h2ph [-d destination directory] [-r | -a] [-l] [headerfiles]>
741
742=head1 DESCRIPTION
743
744I<h2ph>
745converts any C header files specified to the corresponding Perl header file
746format.
747It is most easily run while in /usr/include:
748
749	cd /usr/include; h2ph * sys/*
750
751or
752
753	cd /usr/include; h2ph * sys/* arpa/* netinet/*
754
755or
756
757	cd /usr/include; h2ph -r -l .
758
759The output files are placed in the hierarchy rooted at Perl's
760architecture dependent library directory.  You can specify a different
761hierarchy with a B<-d> switch.
762
763If run with no arguments, filters standard input to standard output.
764
765=head1 OPTIONS
766
767=over 4
768
769=item -d destination_dir
770
771Put the resulting B<.ph> files beneath B<destination_dir>, instead of
772beneath the default Perl library location (C<$Config{'installsitsearch'}>).
773
774=item -r
775
776Run recursively; if any of B<headerfiles> are directories, then run I<h2ph>
777on all files in those directories (and their subdirectories, etc.).  B<-r>
778and B<-a> are mutually exclusive.
779
780=item -a
781
782Run automagically; convert B<headerfiles>, as well as any B<.h> files
783which they include.  This option will search for B<.h> files in all
784directories which your C compiler ordinarily uses.  B<-a> and B<-r> are
785mutually exclusive.
786
787=item -l
788
789Symbolic links will be replicated in the destination directory.  If B<-l>
790is not specified, then links are skipped over.
791
792=item -h
793
794Put ``hints'' in the .ph files which will help in locating problems with
795I<h2ph>.  In those cases when you B<require> a B<.ph> file containing syntax
796errors, instead of the cryptic
797
798	[ some error condition ] at (eval mmm) line nnn
799
800you will see the slightly more helpful
801
802	[ some error condition ] at filename.ph line nnn
803
804However, the B<.ph> files almost double in size when built using B<-h>.
805
806=item -D
807
808Include the code from the B<.h> file as a comment in the B<.ph> file.
809This is primarily used for debugging I<h2ph>.
810
811=item -Q
812
813``Quiet'' mode; don't print out the names of the files being converted.
814
815=back
816
817=head1 ENVIRONMENT
818
819No environment variables are used.
820
821=head1 FILES
822
823 /usr/include/*.h
824 /usr/include/sys/*.h
825
826etc.
827
828=head1 AUTHOR
829
830Larry Wall
831
832=head1 SEE ALSO
833
834perl(1)
835
836=head1 DIAGNOSTICS
837
838The usual warnings if it can't read or write the files involved.
839
840=head1 BUGS
841
842Doesn't construct the %sizeof array for you.
843
844It doesn't handle all C constructs, but it does attempt to isolate
845definitions inside evals so that you can get at the definitions
846that it can translate.
847
848It's only intended as a rough tool.
849You may need to dicker with the files produced.
850
851You have to run this program by hand; it's not run as part of the Perl
852installation.
853
854Doesn't handle complicated expressions built piecemeal, a la:
855
856    enum {
857        FIRST_VALUE,
858        SECOND_VALUE,
859    #ifdef ABC
860        THIRD_VALUE
861    #endif
862    };
863
864Doesn't necessarily locate all of your C compiler's internally-defined
865symbols.
866
867=cut
868
869!NO!SUBS!
870
871close OUT or die "Can't close $file: $!";
872chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
873exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';
874chdir $origdir;
875