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[perl #38385] _h2ph_pre.ph / $Config{cppsymbols} omits gcc-3.4+ cpp "predefined macros"
[perl5.git] / utils / h2ph.PL
CommitLineData
4633a7c4
LW
1#!/usr/local/bin/perl
2
3use Config;
ee580363 4use File::Basename qw(basename dirname);
8a5546a1 5use Cwd;
4633a7c4
LW
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: $archlibexp
14
15# This forces PL files to create target in same directory as PL file.
16# This is so that make depend always knows where to find PL derivatives.
8a5546a1 17$origdir = cwd;
44a8e56a
PP
18chdir dirname($0);
19$file = basename($0, '.PL');
774d564b 20$file .= '.com' if $^O eq 'VMS';
4633a7c4
LW
21
22open OUT,">$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 $Config{...} to use Configure variables.
28
29print OUT <<"!GROK!THIS!";
5f05dabc
PP
30$Config{startperl}
31 eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
32 if \$running_under_some_shell;
154e51a4
LW
33!GROK!THIS!
34
4633a7c4
LW
35# In the following, perl variables are not expanded during extraction.
36
37print OUT <<'!NO!SUBS!';
154e51a4 38
fc865b05
JH
39use strict;
40
2c2acf7e 41use Config;
b306bf39 42use File::Path qw(mkpath);
50f6e060
KS
43use Getopt::Std;
44
80d6dabb
SR
45# Make sure read permissions for all are set:
46if (defined umask && (umask() & 0444)) {
47 umask (umask() & ~0444);
48}
49
917244ce
AS
50getopts('Dd:rlhaQe');
51use vars qw($opt_D $opt_d $opt_r $opt_l $opt_h $opt_a $opt_Q $opt_e);
1d3434b8 52die "-r and -a options are mutually exclusive\n" if ($opt_r and $opt_a);
fc865b05 53my @inc_dirs = inc_dirs() if $opt_a;
2c2acf7e 54
b306bf39
RS
55my $Exit = 0;
56
50f6e060 57my $Dest_dir = $opt_d || $Config{installsitearch};
b306bf39
RS
58die "Destination directory $Dest_dir doesn't exist or isn't a directory\n"
59 unless -d $Dest_dir;
154e51a4 60
e77cf69f 61my @isatype = qw(
fe14fcc3
LW
62 char uchar u_char
63 short ushort u_short
64 int uint u_int
65 long ulong u_long
fb73857a 66 FILE key_t caddr_t
e77cf69f
RGS
67 float double size_t
68);
fe14fcc3 69
fc865b05 70my %isatype;
55204971 71@isatype{@isatype} = (1) x @isatype;
fc865b05
JH
72my $inif = 0;
73my %Is_converted;
917244ce 74my %bad_file = ();
fe14fcc3
LW
75
76@ARGV = ('-') unless @ARGV;
154e51a4 77
7f04632d
GS
78build_preamble_if_necessary();
79
917244ce
AS
80sub reindent($) {
81 my($text) = shift;
82 $text =~ s/\n/\n /g;
83 $text =~ s/ /\t/g;
84 $text;
85}
86
fc865b05 87my ($t, $tab, %curargs, $new, $eval_index, $dir, $name, $args, $outfile);
917244ce 88my ($incl, $incl_type, $next);
fc865b05 89while (defined (my $file = next_file())) {
50f6e060
KS
90 if (-l $file and -d $file) {
91 link_if_possible($file) if ($opt_l);
92 next;
93 }
94
5f05dabc
PP
95 # Recover from header files with unbalanced cpp directives
96 $t = '';
97 $tab = 0;
98
50f6e060
KS
99 # $eval_index goes into ``#line'' directives, to help locate syntax errors:
100 $eval_index = 1;
101
fe14fcc3
LW
102 if ($file eq '-') {
103 open(IN, "-");
104 open(OUT, ">-");
ee580363 105 } else {
fe14fcc3 106 ($outfile = $file) =~ s/\.h$/.ph/ || next;
625ca0ef 107 print "$file -> $outfile\n" unless $opt_Q;
fe14fcc3
LW
108 if ($file =~ m|^(.*)/|) {
109 $dir = $1;
b306bf39 110 mkpath "$Dest_dir/$dir";
154e51a4 111 }
1d3434b8
GS
112
113 if ($opt_a) { # automagic mode: locate header file in @inc_dirs
114 foreach (@inc_dirs) {
115 chdir $_;
116 last if -f $file;
117 }
118 }
119
b306bf39
RS
120 open(IN,"$file") || (($Exit = 1),(warn "Can't open $file: $!\n"),next);
121 open(OUT,">$Dest_dir/$outfile") || die "Can't create $outfile: $!\n";
154e51a4 122 }
7f04632d 123
ccfcdfed
JH
124 print OUT
125 "require '_h2ph_pre.ph';\n\n",
126 "no warnings 'redefine';\n\n";
dccff43d
JH
127
128 while (defined (local $_ = next_line($file))) {
1d2dff63 129 if (s/^\s*\#\s*//) {
154e51a4
LW
130 if (s/^define\s+(\w+)//) {
131 $name = $1;
132 $new = '';
133 s/\s+$//;
1be505aa 134 s/\(\w+\s*\(\*\)\s*\(\w*\)\)\s*(-?\d+)/$1/; # (int (*)(foo_t))0
154e51a4
LW
135 if (s/^\(([\w,\s]*)\)//) {
136 $args = $1;
09f42789 137 my $proto = '() ';
154e51a4 138 if ($args ne '') {
09f42789 139 $proto = '';
fc865b05 140 foreach my $arg (split(/,\s*/,$args)) {
55204971 141 $arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/;
154e51a4
LW
142 $curargs{$arg} = 1;
143 }
144 $args =~ s/\b(\w)/\$$1/g;
d02b64de 145 $args = "my($args) = \@_;\n$t ";
154e51a4
LW
146 }
147 s/^\s+//;
5f05dabc 148 expr();
ee580363 149 $new =~ s/(["\\])/\\$1/g; #"]);
0e885527 150 EMIT:
ee580363
GS
151 $new = reindent($new);
152 $args = reindent($args);
154e51a4 153 if ($t ne '') {
ee580363 154 $new =~ s/(['\\])/\\$1/g; #']);
50f6e060
KS
155 if ($opt_h) {
156 print OUT $t,
ee580363 157 "eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n";
50f6e060
KS
158 $eval_index++;
159 } else {
160 print OUT $t,
ee580363 161 "eval 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n";
50f6e060 162 }
ee580363
GS
163 } else {
164 print OUT "unless(defined(\&$name)) {\n sub $name $proto\{\n\t${args}eval q($new);\n }\n}\n";
154e51a4
LW
165 }
166 %curargs = ();
ee580363 167 } else {
154e51a4 168 s/^\s+//;
5f05dabc 169 expr();
154e51a4 170 $new = 1 if $new eq '';
ee580363
GS
171 $new = reindent($new);
172 $args = reindent($args);
154e51a4 173 if ($t ne '') {
ee580363 174 $new =~ s/(['\\])/\\$1/g; #']);
7f04632d 175
50f6e060
KS
176 if ($opt_h) {
177 print OUT $t,"eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name () {",$new,";}' unless defined(\&$name);\n";
178 $eval_index++;
179 } else {
180 print OUT $t,"eval 'sub $name () {",$new,";}' unless defined(\&$name);\n";
181 }
ee580363 182 } else {
7f04632d
GS
183 # Shunt around such directives as `#define FOO FOO':
184 next if " \&$name" eq $new;
185
ee580363 186 print OUT $t,"unless(defined(\&$name)) {\n sub $name () {\t",$new,";}\n}\n";
154e51a4
LW
187 }
188 }
917244ce
AS
189 } elsif (/^(include|import|include_next)\s*[<\"](.*)[>\"]/) {
190 $incl_type = $1;
191 $incl = $2;
192 if (($incl_type eq 'include_next') ||
193 ($opt_e && exists($bad_file{$incl}))) {
194 $incl =~ s/\.h$/.ph/;
ee580363 195 print OUT ($t,
1d2dff63
GS
196 "eval {\n");
197 $tab += 4;
198 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
917244ce
AS
199 print OUT ($t, "my(\@REM);\n");
200 if ($incl_type eq 'include_next') {
1d2dff63
GS
201 print OUT ($t,
202 "my(\%INCD) = map { \$INC{\$_} => 1 } ",
917244ce
AS
203 "(grep { \$_ eq \"$incl\" } ",
204 "keys(\%INC));\n");
1d2dff63 205 print OUT ($t,
917244ce 206 "\@REM = map { \"\$_/$incl\" } ",
1d2dff63 207 "(grep { not exists(\$INCD{\"\$_/$incl\"})",
917244ce
AS
208 " and -f \"\$_/$incl\" } \@INC);\n");
209 } else {
210 print OUT ($t,
211 "\@REM = map { \"\$_/$incl\" } ",
212 "(grep {-r \"\$_/$incl\" } \@INC);\n");
213 }
1d2dff63
GS
214 print OUT ($t,
215 "require \"\$REM[0]\" if \@REM;\n");
216 $tab -= 4;
217 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
218 print OUT ($t,
219 "};\n");
220 print OUT ($t,
221 "warn(\$\@) if \$\@;\n");
917244ce
AS
222 } else {
223 $incl =~ s/\.h$/.ph/;
224 print OUT $t,"require '$incl';\n";
225 }
ee580363
GS
226 } elsif (/^ifdef\s+(\w+)/) {
227 print OUT $t,"if(defined(&$1)) {\n";
154e51a4
LW
228 $tab += 4;
229 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
ee580363
GS
230 } elsif (/^ifndef\s+(\w+)/) {
231 print OUT $t,"unless(defined(&$1)) {\n";
232 $tab += 4;
233 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
234 } elsif (s/^if\s+//) {
154e51a4 235 $new = '';
748a9306 236 $inif = 1;
5f05dabc 237 expr();
748a9306 238 $inif = 0;
ee580363 239 print OUT $t,"if($new) {\n";
154e51a4
LW
240 $tab += 4;
241 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
ee580363 242 } elsif (s/^elif\s+//) {
154e51a4 243 $new = '';
748a9306 244 $inif = 1;
5f05dabc 245 expr();
748a9306 246 $inif = 0;
154e51a4
LW
247 $tab -= 4;
248 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
ee580363 249 print OUT $t,"}\n elsif($new) {\n";
154e51a4
LW
250 $tab += 4;
251 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
ee580363 252 } elsif (/^else/) {
154e51a4
LW
253 $tab -= 4;
254 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
ee580363 255 print OUT $t,"} else {\n";
154e51a4
LW
256 $tab += 4;
257 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
ee580363 258 } elsif (/^endif/) {
154e51a4
LW
259 $tab -= 4;
260 $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
261 print OUT $t,"}\n";
ee580363
GS
262 } elsif(/^undef\s+(\w+)/) {
263 print OUT $t, "undef(&$1) if defined(&$1);\n";
d3e00f1c
SK
264 } elsif(/^error\s+(".*")/) {
265 print OUT $t, "die($1);\n";
ee580363 266 } elsif(/^error\s+(.*)/) {
5d42aa7b 267 print OUT $t, "die(\"", quotemeta($1), "\");\n";
ee580363 268 } elsif(/^warning\s+(.*)/) {
5d42aa7b 269 print OUT $t, "warn(\"", quotemeta($1), "\");\n";
ee580363
GS
270 } elsif(/^ident\s+(.*)/) {
271 print OUT $t, "# $1\n";
154e51a4 272 }
09f42789 273 } elsif (/^\s*(typedef\s*)?enum\s*(\s+[a-zA-Z_]\w*\s*)?/) { # { for vi
e7cba2ba 274 until(/\{[^}]*\}.*;/ || /;/) {
dccff43d 275 last unless defined ($next = next_line($file));
e7cba2ba
JH
276 chomp $next;
277 # drop "#define FOO FOO" in enums
278 $next =~ s/^\s*#\s*define\s+(\w+)\s+\1\s*$//;
9e3b9e5a
OT
279 # #defines in enums (aliases)
280 $next =~ s/^\s*#\s*define\s+(\w+)\s+(\w+)\s*$/$1 = $2,/;
1d2dff63
GS
281 $_ .= $next;
282 print OUT "# $next\n" if $opt_D;
283 }
e7cba2ba 284 s/#\s*if.*?#\s*endif//g; # drop #ifdefs
1d2dff63
GS
285 s@/\*.*?\*/@@g;
286 s/\s+/ /g;
e7cba2ba 287 next unless /^\s?(typedef\s?)?enum\s?([a-zA-Z_]\w*)?\s?\{(.*)\}\s?([a-zA-Z_]\w*)?\s?;/;
fc865b05
JH
288 (my $enum_subs = $3) =~ s/\s//g;
289 my @enum_subs = split(/,/, $enum_subs);
290 my $enum_val = -1;
291 foreach my $enum (@enum_subs) {
292 my ($enum_name, $enum_value) = $enum =~ /^([a-zA-Z_]\w*)(=.+)?$/;
9e3b9e5a 293 $enum_name or next;
1d2dff63
GS
294 $enum_value =~ s/^=//;
295 $enum_val = (length($enum_value) ? $enum_value : $enum_val + 1);
296 if ($opt_h) {
297 print OUT ($t,
298 "eval(\"\\n#line $eval_index $outfile\\n",
299 "sub $enum_name () \{ $enum_val; \}\") ",
300 "unless defined(\&$enum_name);\n");
301 ++ $eval_index;
302 } else {
303 print OUT ($t,
304 "eval(\"sub $enum_name () \{ $enum_val; \}\") ",
305 "unless defined(\&$enum_name);\n");
306 }
307 }
5fff27bd
RGS
308 } elsif (/^(?:__extension__\s+)?(?:extern|static)\s+(?:__)?inline(?:__)?\s+/
309 and !/;\s*$/ and !/{\s*}\s*$/)
310 { # { for vi
09f42789 311 # This is a hack to parse the inline functions in the glibc headers.
5fff27bd
RGS
312 # Warning: massive kludge ahead. We suppose inline functions
313 # are mainly constructed like macros.
09f42789
RGS
314 while (1) {
315 last unless defined ($next = next_line($file));
316 chomp $next;
5fff27bd
RGS
317 undef $_, last if $next =~ /__THROW\s*;/
318 or $next =~ /^(__extension__|extern|static)\b/;
09f42789
RGS
319 $_ .= " $next";
320 print OUT "# $next\n" if $opt_D;
321 last if $next =~ /^}|^{.*}\s*$/;
322 }
323 next if not defined; # because it's only a prototype
0e885527
RGS
324 s/\b(__extension__|extern|static|(?:__)?inline(?:__)?)\b//g;
325 # violently drop #ifdefs
326 s/#\s*if.*?#\s*endif//g
327 and print OUT "# some #ifdef were dropped here -- fill in the blanks\n";
09f42789
RGS
328 if (s/^(?:\w|\s|\*)*\s(\w+)\s*//) {
329 $name = $1;
330 } else {
331 warn "name not found"; next; # shouldn't occur...
332 }
333 my @args;
334 if (s/^\(([^()]*)\)\s*(\w+\s*)*//) {
335 for my $arg (split /,/, $1) {
336 if ($arg =~ /(\w+)\s*$/) {
337 $curargs{$1} = 1;
338 push @args, $1;
339 }
340 }
341 }
342 $args = (
343 @args
d02b64de 344 ? "my(" . (join ',', map "\$$_", @args) . ") = \@_;\n$t "
09f42789
RGS
345 : ""
346 );
347 my $proto = @args ? '' : '() ';
348 $new = '';
349 s/\breturn\b//g; # "return" doesn't occur in macros usually...
350 expr();
0e885527
RGS
351 # try to find and perlify local C variables
352 our @local_variables = (); # needs to be a our(): (?{...}) bug workaround
e77cf69f
RGS
353 {
354 use re "eval";
355 my $typelist = join '|', keys %isatype;
356 $new =~ s['
90851df9 357 (?:(?:__)?const(?:__)?\s+)?
e77cf69f
RGS
358 (?:(?:un)?signed\s+)?
359 (?:long\s+)?
360 (?:$typelist)\s+
361 (\w+)
362 (?{ push @local_variables, $1 })
363 ']
364 [my \$$1]gx;
365 $new =~ s['
90851df9 366 (?:(?:__)?const(?:__)?\s+)?
e77cf69f
RGS
367 (?:(?:un)?signed\s+)?
368 (?:long\s+)?
369 (?:$typelist)\s+
370 ' \s+ &(\w+) \s* ;
371 (?{ push @local_variables, $1 })
372 ]
373 [my \$$1;]gx;
374 }
0e885527 375 $new =~ s/&$_\b/\$$_/g for @local_variables;
09f42789 376 $new =~ s/(["\\])/\\$1/g; #"]);
0e885527
RGS
377 # now that's almost like a macro (we hope)
378 goto EMIT;
154e51a4
LW
379 }
380 }
fc865b05 381 $Is_converted{$file} = 1;
917244ce
AS
382 if ($opt_e && exists($bad_file{$file})) {
383 unlink($Dest_dir . '/' . $outfile);
384 $next = '';
385 } else {
386 print OUT "1;\n";
09f42789 387 queue_includes_from($file) if $opt_a;
917244ce 388 }
154e51a4
LW
389}
390
917244ce
AS
391if ($opt_e && (scalar(keys %bad_file) > 0)) {
392 warn "Was unable to convert the following files:\n";
393 warn "\t" . join("\n\t",sort(keys %bad_file)) . "\n";
ee580363
GS
394}
395
917244ce 396exit $Exit;
fc865b05 397
154e51a4 398sub expr {
32aeac00 399 $new = '"(assembly code)"' and return if /\b__asm__\b/; # freak out.
fc865b05 400 my $joined_args;
ee580363 401 if(keys(%curargs)) {
fc865b05 402 $joined_args = join('|', keys(%curargs));
ee580363 403 }
154e51a4 404 while ($_ ne '') {
ee580363
GS
405 s/^\&\&// && do { $new .= " &&"; next;}; # handle && operator
406 s/^\&([\(a-z\)]+)/$1/i; # hack for things that take the address of
154e51a4 407 s/^(\s+)// && do {$new .= ' '; next;};
bf076876 408 s/^0X([0-9A-F]+)[UL]*//i
25146a1a
JH
409 && do {my $hex = $1;
410 $hex =~ s/^0+//;
411 if (length $hex > 8 && !$Config{use64bitint}) {
412 # Croak if nv_preserves_uv_bits < 64 ?
413 $new .= hex(substr($hex, -8)) +
414 2**32 * hex(substr($hex, 0, -8));
415 # The above will produce "errorneus" code
416 # if the hex constant was e.g. inside UINT64_C
417 # macro, but then again, h2ph is an approximation.
418 } else {
419 $new .= lc("0x$hex");
420 }
421 next;};
fd3f0aff 422 s/^(-?\d+\.\d+E[-+]?\d+)[FL]?//i && do {$new .= $1; next;};
50f6e060 423 s/^(\d+)\s*[LU]*//i && do {$new .= $1; next;};
154e51a4
LW
424 s/^("(\\"|[^"])*")// && do {$new .= $1; next;};
425 s/^'((\\"|[^"])*)'// && do {
426 if ($curargs{$1}) {
427 $new .= "ord('\$$1')";
ee580363 428 } else {
154e51a4
LW
429 $new .= "ord('$1')";
430 }
431 next;
432 };
5f05dabc
PP
433 # replace "sizeof(foo)" with "{foo}"
434 # also, remove * (C dereference operator) to avoid perl syntax
435 # problems. Where the %sizeof array comes from is anyone's
436 # guess (c2ph?), but this at least avoids fatal syntax errors.
437 # Behavior is undefined if sizeof() delimiters are unbalanced.
438 # This code was modified to able to handle constructs like this:
439 # sizeof(*(p)), which appear in the HP-UX 10.01 header files.
440 s/^sizeof\s*\(// && do {
441 $new .= '$sizeof';
442 my $lvl = 1; # already saw one open paren
443 # tack { on the front, and skip it in the loop
444 $_ = "{" . "$_";
445 my $index = 1;
446 # find balanced closing paren
447 while ($index <= length($_) && $lvl > 0) {
448 $lvl++ if substr($_, $index, 1) eq "(";
449 $lvl-- if substr($_, $index, 1) eq ")";
450 $index++;
451 }
452 # tack } on the end, replacing )
453 substr($_, $index - 1, 1) = "}";
454 # remove pesky * operators within the sizeof argument
455 substr($_, 0, $index - 1) =~ s/\*//g;
456 next;
457 };
50f6e060
KS
458 # Eliminate typedefs
459 /\(([\w\s]+)[\*\s]*\)\s*[\w\(]/ && do {
55c8af0d 460 my $doit = 1;
50f6e060 461 foreach (split /\s+/, $1) { # Make sure all the words are types,
55c8af0d 462 unless($isatype{$_} or $_ eq 'struct' or $_ eq 'union'){
463 $doit = 0;
464 last;
465 }
466 }
467 if( $doit ){
468 s/\([\w\s]+[\*\s]*\)// && next; # then eliminate them.
50f6e060 469 }
50f6e060 470 };
ee580363
GS
471 # struct/union member, including arrays:
472 s/^([_A-Z]\w*(\[[^\]]+\])?((\.|->)[_A-Z]\w*(\[[^\]]+\])?)+)//i && do {
fc865b05 473 my $id = $1;
ee580363
GS
474 $id =~ s/(\.|(->))([^\.\-]*)/->\{$3\}/g;
475 $id =~ s/\b([^\$])($joined_args)/$1\$$2/g if length($joined_args);
476 while($id =~ /\[\s*([^\$\&\d\]]+)\]/) {
477 my($index) = $1;
478 $index =~ s/\s//g;
479 if(exists($curargs{$index})) {
480 $index = "\$$index";
481 } else {
482 $index = "&$index";
483 }
484 $id =~ s/\[\s*([^\$\&\d\]]+)\]/[$index]/;
485 }
486 $new .= " (\$$id)";
50f6e060 487 };
154e51a4 488 s/^([_a-zA-Z]\w*)// && do {
fc865b05 489 my $id = $1;
99ed927b 490 if ($id eq 'struct' || $id eq 'union') {
fe14fcc3
LW
491 s/^\s+(\w+)//;
492 $id .= ' ' . $1;
493 $isatype{$id} = 1;
ee580363 494 } elsif ($id =~ /^((un)?signed)|(long)|(short)$/) {
50f6e060 495 while (s/^\s+(\w+)//) { $id .= ' ' . $1; }
fe14fcc3
LW
496 $isatype{$id} = 1;
497 }
154e51a4 498 if ($curargs{$id}) {
ee580363
GS
499 $new .= "\$$id";
500 $new .= '->' if /^[\[\{]/;
501 } elsif ($id eq 'defined') {
154e51a4 502 $new .= 'defined';
cd4e1efa
MS
503 } elsif (/^\s*\(/) {
504 s/^\s*\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i; # cheat
154e51a4 505 $new .= " &$id";
ee580363 506 } elsif ($isatype{$id}) {
fe14fcc3
LW
507 if ($new =~ /{\s*$/) {
508 $new .= "'$id'";
ee580363 509 } elsif ($new =~ /\(\s*$/ && /^[\s*]*\)/) {
fe14fcc3
LW
510 $new =~ s/\(\s*$//;
511 s/^[\s*]*\)//;
ee580363 512 } else {
b276c83d 513 $new .= q(').$id.q(');
fe14fcc3 514 }
ee580363 515 } else {
c07a80fd 516 if ($inif && $new !~ /defined\s*\($/) {
748a9306 517 $new .= '(defined(&' . $id . ') ? &' . $id . ' : 0)';
ee580363
GS
518 } elsif (/^\[/) {
519 $new .= " \$$id";
520 } else {
748a9306
LW
521 $new .= ' &' . $id;
522 }
154e51a4
LW
523 }
524 next;
525 };
fb21d8eb 526 s/^(.)// && do { if ($1 ne '#') { $new .= $1; } next;};
154e51a4
LW
527 }
528}
50f6e060
KS
529
530
79c1b905
KS
531sub next_line
532{
dccff43d 533 my $file = shift;
79c1b905 534 my ($in, $out);
b7bcf494 535 my $pre_sub_tri_graphs = 1;
79c1b905
KS
536
537 READ: while (not eof IN) {
538 $in .= <IN>;
539 chomp $in;
540 next unless length $in;
541
542 while (length $in) {
b7bcf494 543 if ($pre_sub_tri_graphs) {
bf076876 544 # Preprocess all tri-graphs
b7bcf494
PP
545 # including things stuck in quoted string constants.
546 $in =~ s/\?\?=/#/g; # | ??=| #|
547 $in =~ s/\?\?\!/|/g; # | ??!| ||
548 $in =~ s/\?\?'/^/g; # | ??'| ^|
549 $in =~ s/\?\?\(/[/g; # | ??(| [|
550 $in =~ s/\?\?\)/]/g; # | ??)| ]|
551 $in =~ s/\?\?\-/~/g; # | ??-| ~|
552 $in =~ s/\?\?\//\\/g; # | ??/| \|
553 $in =~ s/\?\?</{/g; # | ??<| {|
554 $in =~ s/\?\?>/}/g; # | ??>| }|
555 }
9efe82d3 556 if ($in =~ /^\#ifdef __LANGUAGE_PASCAL__/) {
bf076876 557 # Tru64 disassembler.h evilness: mixed C and Pascal.
9efe82d3 558 while (<IN>) {
bf076876 559 last if /^\#endif/;
9efe82d3 560 }
bf076876 561 $in = "";
9efe82d3
JH
562 next READ;
563 }
37723803 564 if ($in =~ /^extern inline / && # Inlined assembler.
dccff43d 565 $^O eq 'linux' && $file =~ m!(?:^|/)asm/[^/]+\.h$!) {
bf076876
AT
566 while (<IN>) {
567 last if /^}/;
dccff43d 568 }
bf076876 569 $in = "";
dccff43d
JH
570 next READ;
571 }
79c1b905
KS
572 if ($in =~ s/\\$//) { # \-newline
573 $out .= ' ';
574 next READ;
575 } elsif ($in =~ s/^([^"'\\\/]+)//) { # Passthrough
576 $out .= $1;
577 } elsif ($in =~ s/^(\\.)//) { # \...
578 $out .= $1;
ab5fe4d6
KS
579 } elsif ($in =~ /^'/) { # '...
580 if ($in =~ s/^('(\\.|[^'\\])*')//) {
581 $out .= $1;
582 } else {
583 next READ;
584 }
585 } elsif ($in =~ /^"/) { # "...
586 if ($in =~ s/^("(\\.|[^"\\])*")//) {
587 $out .= $1;
588 } else {
589 next READ;
590 }
79c1b905 591 } elsif ($in =~ s/^\/\/.*//) { # //...
edf6e4ec 592 # fall through
79c1b905
KS
593 } elsif ($in =~ m/^\/\*/) { # /*...
594 # C comment removal adapted from perlfaq6:
595 if ($in =~ s/^\/\*[^*]*\*+([^\/*][^*]*\*+)*\///) {
596 $out .= ' ';
597 } else { # Incomplete /* */
598 next READ;
599 }
600 } elsif ($in =~ s/^(\/)//) { # /...
601 $out .= $1;
602 } elsif ($in =~ s/^([^\'\"\\\/]+)//) {
603 $out .= $1;
889e303a
JH
604 } elsif ($^O eq 'linux' &&
605 $file =~ m!(?:^|/)linux/byteorder/pdp_endian\.h$! &&
606 $in =~ s!\'T KNOW!!) {
607 $out =~ s!I DON$!I_DO_NOT_KNOW!;
79c1b905 608 } else {
917244ce
AS
609 if ($opt_e) {
610 warn "Cannot parse $file:\n$in\n";
611 $bad_file{$file} = 1;
612 $in = '';
613 $out = undef;
614 last READ;
615 } else {
dccff43d 616 die "Cannot parse:\n$in\n";
917244ce 617 }
79c1b905
KS
618 }
619 }
620
edf6e4ec 621 last READ if $out =~ /\S/;
79c1b905
KS
622 }
623
624 return $out;
625}
626
627
50f6e060
KS
628# Handle recursive subdirectories without getting a grotesquely big stack.
629# Could this be implemented using File::Find?
630sub next_file
631{
632 my $file;
633
634 while (@ARGV) {
635 $file = shift @ARGV;
636
637 if ($file eq '-' or -f $file or -l $file) {
638 return $file;
639 } elsif (-d $file) {
640 if ($opt_r) {
641 expand_glob($file);
642 } else {
643 print STDERR "Skipping directory `$file'\n";
644 }
1d3434b8
GS
645 } elsif ($opt_a) {
646 return $file;
647 } else {
50f6e060
KS
648 print STDERR "Skipping `$file': not a file or directory\n";
649 }
650 }
651
652 return undef;
653}
654
655
656# Put all the files in $directory into @ARGV for processing.
657sub expand_glob
658{
659 my ($directory) = @_;
660
661 $directory =~ s:/$::;
662
663 opendir DIR, $directory;
664 foreach (readdir DIR) {
665 next if ($_ eq '.' or $_ eq '..');
666
667 # expand_glob() is going to be called until $ARGV[0] isn't a
668 # directory; so push directories, and unshift everything else.
1d3434b8
GS
669 if (-d "$directory/$_") { push @ARGV, "$directory/$_" }
670 else { unshift @ARGV, "$directory/$_" }
50f6e060
KS
671 }
672 closedir DIR;
673}
674
675
676# Given $file, a symbolic link to a directory in the C include directory,
677# make an equivalent symbolic link in $Dest_dir, if we can figure out how.
678# Otherwise, just duplicate the file or directory.
679sub link_if_possible
680{
681 my ($dirlink) = @_;
682 my $target = eval 'readlink($dirlink)';
683
684 if ($target =~ m:^\.\./: or $target =~ m:^/:) {
685 # The target of a parent or absolute link could leave the $Dest_dir
686 # hierarchy, so let's put all of the contents of $dirlink (actually,
687 # the contents of $target) into @ARGV; as a side effect down the
688 # line, $dirlink will get created as an _actual_ directory.
689 expand_glob($dirlink);
690 } else {
691 if (-l "$Dest_dir/$dirlink") {
692 unlink "$Dest_dir/$dirlink" or
693 print STDERR "Could not remove link $Dest_dir/$dirlink: $!\n";
694 }
1d3434b8 695
50f6e060
KS
696 if (eval 'symlink($target, "$Dest_dir/$dirlink")') {
697 print "Linking $target -> $Dest_dir/$dirlink\n";
698
699 # Make sure that the link _links_ to something:
700 if (! -e "$Dest_dir/$target") {
1d3434b8 701 mkpath("$Dest_dir/$target", 0755) or
50f6e060
KS
702 print STDERR "Could not create $Dest_dir/$target/\n";
703 }
704 } else {
705 print STDERR "Could not symlink $target -> $Dest_dir/$dirlink: $!\n";
706 }
707 }
708}
709
710
1d3434b8
GS
711# Push all #included files in $file onto our stack, except for STDIN
712# and files we've already processed.
713sub queue_includes_from
714{
715 my ($file) = @_;
716 my $line;
717
718 return if ($file eq "-");
719
720 open HEADER, $file or return;
721 while (defined($line = <HEADER>)) {
722 while (/\\$/) { # Handle continuation lines
723 chop $line;
724 $line .= <HEADER>;
725 }
726
727 if ($line =~ /^#\s*include\s+<(.*?)>/) {
fc865b05 728 push(@ARGV, $1) unless $Is_converted{$1};
1d3434b8
GS
729 }
730 }
731 close HEADER;
732}
733
734
735# Determine include directories; $Config{usrinc} should be enough for (all
736# non-GCC?) C compilers, but gcc uses an additional include directory.
737sub inc_dirs
738{
11d31e40
JVD
739 my $from_gcc = `LC_ALL=C $Config{cc} -v 2>&1`;
740 if( !( $from_gcc =~ s:^Reading specs from (.*?)/specs\b.*:$1/include:s ) )
741 { # gcc-4+ :
742 $from_gcc = `LC_ALL=C $Config{cc} -print-search-dirs 2>&1`;
743 if ( !($from_gcc =~ s/^install:\s*([^\s]+[^\s\/])([\s\/]*).*$/$1\/include/s) )
744 {
745 $from_gcc = '';
746 };
747 };
1d3434b8
GS
748 length($from_gcc) ? ($from_gcc, $Config{usrinc}) : ($Config{usrinc});
749}
750
751
7f04632d
GS
752# Create "_h2ph_pre.ph", if it doesn't exist or was built by a different
753# version of h2ph.
754sub build_preamble_if_necessary
755{
756 # Increment $VERSION every time this function is modified:
00f0ad8c 757 my $VERSION = 2;
7f04632d
GS
758 my $preamble = "$Dest_dir/_h2ph_pre.ph";
759
760 # Can we skip building the preamble file?
761 if (-r $preamble) {
762 # Extract version number from first line of preamble:
763 open PREAMBLE, $preamble or die "Cannot open $preamble: $!";
764 my $line = <PREAMBLE>;
765 $line =~ /(\b\d+\b)/;
766 close PREAMBLE or die "Cannot close $preamble: $!";
767
768 # Don't build preamble if a compatible preamble exists:
769 return if $1 == $VERSION;
770 }
771
772 my (%define) = _extract_cc_defines();
773
774 open PREAMBLE, ">$preamble" or die "Cannot open $preamble: $!";
ddfca5da 775 print PREAMBLE "# This file was created by h2ph version $VERSION\n";
7f04632d 776
ddfca5da
JVD
777 foreach (sort keys %define) {
778 if ($opt_D) {
779 print PREAMBLE "# $_=$define{$_}\n";
780 }
781 if ($define{$_} =~ /^\((.*)\)$/) {
782 # parenthesized value: d=(v)
783 $define{$_} = $1;
784 }
785 if ($define{$_} =~ /^([+-]?(\d+)?\.\d+([eE][+-]?\d+)?)[FL]?$/) {
786 # float:
787 print PREAMBLE
788 "unless (defined &$_) { sub $_() { $1 } }\n\n";
789 } elsif ($define{$_} =~ /^([+-]?\d+)U?L{0,2}$/i) {
790 # integer:
791 print PREAMBLE
792 "unless (defined &$_) { sub $_() { $1 } }\n\n";
793 } elsif ($define{$_} =~ /^\w+$/) {
794 print PREAMBLE
795 "unless (defined &$_) { sub $_() { &$define{$_} } }\n\n";
796 } else {
797 print PREAMBLE
798 "unless (defined &$_) { sub $_() { \"",
799 quotemeta($define{$_}), "\" } }\n\n";
800 }
801 }
7f04632d
GS
802 close PREAMBLE or die "Cannot close $preamble: $!";
803}
804
805
806# %Config contains information on macros that are pre-defined by the
807# system's compiler. We need this information to make the .ph files
808# function with perl as the .h files do with cc.
809sub _extract_cc_defines
810{
811 my %define;
fc865b05 812 my $allsymbols = join " ",
ddfca5da 813 @Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'};
7f04632d
GS
814
815 # Split compiler pre-definitions into `key=value' pairs:
ddfca5da
JVD
816 while ($allsymbols =~ /([^\s]+)=((\\\s|[^\s])+)/g) {
817 $define{$1} = $2;
818 if ($opt_D) {
819 print STDERR "$_: $1 -> $2\n";
820 }
7f04632d
GS
821 }
822
823 return %define;
824}
825
826
50f6e060
KS
8271;
828
154e51a4 829##############################################################################
1fef88e7
JM
830__END__
831
832=head1 NAME
833
834h2ph - convert .h C header files to .ph Perl header files
835
836=head1 SYNOPSIS
837
1d3434b8 838B<h2ph [-d destination directory] [-r | -a] [-l] [headerfiles]>
1fef88e7
JM
839
840=head1 DESCRIPTION
154e51a4 841
1fef88e7 842I<h2ph>
154e51a4
LW
843converts any C header files specified to the corresponding Perl header file
844format.
845It is most easily run while in /usr/include:
154e51a4
LW
846
847 cd /usr/include; h2ph * sys/*
848
50f6e060
KS
849or
850
ef0ae776
JH
851 cd /usr/include; h2ph * sys/* arpa/* netinet/*
852
853or
854
50f6e060
KS
855 cd /usr/include; h2ph -r -l .
856
b306bf39
RS
857The output files are placed in the hierarchy rooted at Perl's
858architecture dependent library directory. You can specify a different
859hierarchy with a B<-d> switch.
860
fe14fcc3 861If run with no arguments, filters standard input to standard output.
1fef88e7 862
50f6e060
KS
863=head1 OPTIONS
864
865=over 4
866
867=item -d destination_dir
868
869Put the resulting B<.ph> files beneath B<destination_dir>, instead of
870beneath the default Perl library location (C<$Config{'installsitsearch'}>).
871
872=item -r
873
874Run recursively; if any of B<headerfiles> are directories, then run I<h2ph>
1d3434b8
GS
875on all files in those directories (and their subdirectories, etc.). B<-r>
876and B<-a> are mutually exclusive.
877
878=item -a
879
880Run automagically; convert B<headerfiles>, as well as any B<.h> files
881which they include. This option will search for B<.h> files in all
882directories which your C compiler ordinarily uses. B<-a> and B<-r> are
883mutually exclusive.
50f6e060
KS
884
885=item -l
886
887Symbolic links will be replicated in the destination directory. If B<-l>
888is not specified, then links are skipped over.
889
890=item -h
891
892Put ``hints'' in the .ph files which will help in locating problems with
893I<h2ph>. In those cases when you B<require> a B<.ph> file containing syntax
894errors, instead of the cryptic
895
896 [ some error condition ] at (eval mmm) line nnn
897
898you will see the slightly more helpful
899
900 [ some error condition ] at filename.ph line nnn
901
902However, the B<.ph> files almost double in size when built using B<-h>.
903
1d3434b8
GS
904=item -D
905
906Include the code from the B<.h> file as a comment in the B<.ph> file.
907This is primarily used for debugging I<h2ph>.
908
7f04632d
GS
909=item -Q
910
911``Quiet'' mode; don't print out the names of the files being converted.
912
50f6e060
KS
913=back
914
1fef88e7
JM
915=head1 ENVIRONMENT
916
154e51a4 917No environment variables are used.
1fef88e7
JM
918
919=head1 FILES
920
921 /usr/include/*.h
922 /usr/include/sys/*.h
923
154e51a4 924etc.
1fef88e7
JM
925
926=head1 AUTHOR
927
154e51a4 928Larry Wall
1fef88e7
JM
929
930=head1 SEE ALSO
931
154e51a4 932perl(1)
1fef88e7
JM
933
934=head1 DIAGNOSTICS
935
154e51a4 936The usual warnings if it can't read or write the files involved.
1fef88e7
JM
937
938=head1 BUGS
939
154e51a4 940Doesn't construct the %sizeof array for you.
1fef88e7 941
154e51a4
LW
942It doesn't handle all C constructs, but it does attempt to isolate
943definitions inside evals so that you can get at the definitions
944that it can translate.
1fef88e7 945
154e51a4
LW
946It's only intended as a rough tool.
947You may need to dicker with the files produced.
1fef88e7 948
7f04632d
GS
949You have to run this program by hand; it's not run as part of the Perl
950installation.
951
952Doesn't handle complicated expressions built piecemeal, a la:
953
954 enum {
ddfca5da
JVD
955 FIRST_VALUE,
956 SECOND_VALUE,
7f04632d 957 #ifdef ABC
ddfca5da 958 THIRD_VALUE
7f04632d
GS
959 #endif
960 };
961
962Doesn't necessarily locate all of your C compiler's internally-defined
963symbols.
964
1fef88e7
JM
965=cut
966
154e51a4 967!NO!SUBS!
4633a7c4
LW
968
969close OUT or die "Can't close $file: $!";
970chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
971exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';
8a5546a1 972chdir $origdir;