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[p5sagit/p5-mst-13.2.git] / lib / ExtUtils / ParseXS.pm
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6b09c160 1package ExtUtils::ParseXS;
2
3use 5.006; # We use /??{}/ in regexes
4use Cwd;
5use Config;
6use File::Basename;
7use File::Spec;
8
9require Exporter;
10
11@ISA = qw(Exporter);
12@EXPORT_OK = qw(process_file);
13
14# use strict; # One of these days...
15
16my(@XSStack); # Stack of conditionals and INCLUDEs
17my($XSS_work_idx, $cpp_next_tmp);
18
19use vars qw($VERSION);
da2b6f33 20$VERSION = '2.11_01';
6b09c160 21
22use vars qw(%input_expr %output_expr $ProtoUsed @InitFileCode $FH $proto_re $Overload $errors $Fallback
23 $cplusplus $hiertype $WantPrototypes $WantVersionChk $except $WantLineNumbers
24 $WantOptimize $process_inout $process_argtypes @tm
25 $dir $filename $filepathname %IncludedFiles
26 %type_kind %proto_letter
27 %targetable $BLOCK_re $lastline $lastline_no
28 $Package $Prefix @line @BootCode %args_match %defaults %var_types %arg_list @proto_arg
29 $processing_arg_with_types %argtype_seen @outlist %in_out %lengthof
30 $proto_in_this_xsub $scope_in_this_xsub $interface $prepush_done $interface_macro $interface_macro_set
31 $ProtoThisXSUB $ScopeThisXSUB $xsreturn
32 @line_no $ret_type $func_header $orig_args
33 ); # Add these just to get compilation to happen.
34
35
36sub process_file {
37
38 # Allow for $package->process_file(%hash) in the future
39 my ($pkg, %args) = @_ % 2 ? @_ : (__PACKAGE__, @_);
40
41 $ProtoUsed = exists $args{prototypes};
42
43 # Set defaults.
44 %args = (
45 # 'C++' => 0, # Doesn't seem to *do* anything...
46 hiertype => 0,
47 except => 0,
48 prototypes => 0,
49 versioncheck => 1,
50 linenumbers => 1,
51 optimize => 1,
52 prototypes => 0,
53 inout => 1,
54 argtypes => 1,
55 typemap => [],
56 output => \*STDOUT,
008fb49c 57 csuffix => '.c',
6b09c160 58 %args,
59 );
60
61 # Global Constants
62
63 my ($Is_VMS, $SymSet);
64 if ($^O eq 'VMS') {
65 $Is_VMS = 1;
66 # Establish set of global symbols with max length 28, since xsubpp
67 # will later add the 'XS_' prefix.
68 require ExtUtils::XSSymSet;
69 $SymSet = new ExtUtils::XSSymSet 28;
70 }
71 @XSStack = ({type => 'none'});
72 ($XSS_work_idx, $cpp_next_tmp) = (0, "XSubPPtmpAAAA");
73 @InitFileCode = ();
74 $FH = 'File0000' ;
75 $proto_re = "[" . quotemeta('\$%&*@;[]') . "]" ;
76 $Overload = 0;
77 $errors = 0;
78 $Fallback = 'PL_sv_undef';
79
80 # Most of the 1500 lines below uses these globals. We'll have to
81 # clean this up sometime, probably. For now, we just pull them out
82 # of %args. -Ken
83
84 $cplusplus = $args{'C++'};
85 $hiertype = $args{hiertype};
86 $WantPrototypes = $args{prototypes};
87 $WantVersionChk = $args{versioncheck};
88 $except = $args{except} ? ' TRY' : '';
89 $WantLineNumbers = $args{linenumbers};
90 $WantOptimize = $args{optimize};
91 $process_inout = $args{inout};
92 $process_argtypes = $args{argtypes};
93 @tm = ref $args{typemap} ? @{$args{typemap}} : ($args{typemap});
94
95 for ($args{filename}) {
96 die "Missing required parameter 'filename'" unless $_;
97 $filepathname = $_;
98 ($dir, $filename) = (dirname($_), basename($_));
99 $filepathname =~ s/\\/\\\\/g;
100 $IncludedFiles{$_}++;
101 }
102
103 # Open the input file
104 open($FH, $args{filename}) or die "cannot open $args{filename}: $!\n";
105
106 # Open the output file if given as a string. If they provide some
107 # other kind of reference, trust them that we can print to it.
108 if (not ref $args{output}) {
109 open my($fh), "> $args{output}" or die "Can't create $args{output}: $!";
110 $args{outfile} = $args{output};
111 $args{output} = $fh;
112 }
113
114 # Really, we shouldn't have to chdir() or select() in the first
115 # place. For now, just save & restore.
116 my $orig_cwd = cwd();
117 my $orig_fh = select();
118
119 chdir($dir);
120 my $pwd = cwd();
008fb49c 121 my $csuffix = $args{csuffix};
6b09c160 122
123 if ($WantLineNumbers) {
124 my $cfile;
125 if ( $args{outfile} ) {
126 $cfile = $args{outfile};
127 } else {
128 $cfile = $args{filename};
008fb49c 129 $cfile =~ s/\.xs$/$csuffix/i or $cfile .= $csuffix;
6b09c160 130 }
131 tie(*PSEUDO_STDOUT, 'ExtUtils::ParseXS::CountLines', $cfile, $args{output});
132 select PSEUDO_STDOUT;
133 } else {
134 select $args{output};
135 }
136
137 foreach my $typemap (@tm) {
138 die "Can't find $typemap in $pwd\n" unless -r $typemap;
139 }
140
141 push @tm, standard_typemap_locations();
142
143 foreach my $typemap (@tm) {
144 next unless -f $typemap ;
145 # skip directories, binary files etc.
146 warn("Warning: ignoring non-text typemap file '$typemap'\n"), next
147 unless -T $typemap ;
148 open(TYPEMAP, $typemap)
149 or warn ("Warning: could not open typemap file '$typemap': $!\n"), next;
150 my $mode = 'Typemap';
151 my $junk = "" ;
152 my $current = \$junk;
153 while (<TYPEMAP>) {
154 next if /^\s* #/;
155 my $line_no = $. + 1;
156 if (/^INPUT\s*$/) {
157 $mode = 'Input'; $current = \$junk; next;
158 }
159 if (/^OUTPUT\s*$/) {
160 $mode = 'Output'; $current = \$junk; next;
161 }
162 if (/^TYPEMAP\s*$/) {
163 $mode = 'Typemap'; $current = \$junk; next;
164 }
165 if ($mode eq 'Typemap') {
166 chomp;
167 my $line = $_ ;
168 TrimWhitespace($_) ;
169 # skip blank lines and comment lines
170 next if /^$/ or /^#/ ;
171 my($type,$kind, $proto) = /^\s*(.*?\S)\s+(\S+)\s*($proto_re*)\s*$/ or
172 warn("Warning: File '$typemap' Line $. '$line' TYPEMAP entry needs 2 or 3 columns\n"), next;
173 $type = TidyType($type) ;
174 $type_kind{$type} = $kind ;
175 # prototype defaults to '$'
176 $proto = "\$" unless $proto ;
177 warn("Warning: File '$typemap' Line $. '$line' Invalid prototype '$proto'\n")
178 unless ValidProtoString($proto) ;
179 $proto_letter{$type} = C_string($proto) ;
180 } elsif (/^\s/) {
181 $$current .= $_;
182 } elsif ($mode eq 'Input') {
183 s/\s+$//;
184 $input_expr{$_} = '';
185 $current = \$input_expr{$_};
186 } else {
187 s/\s+$//;
188 $output_expr{$_} = '';
189 $current = \$output_expr{$_};
190 }
191 }
192 close(TYPEMAP);
193 }
194
195 foreach my $key (keys %input_expr) {
196 $input_expr{$key} =~ s/;*\s+\z//;
197 }
198
a8adbc99 199 my ($cast, $size);
200 our $bal = qr[(?:(?>[^()]+)|\((??{ $bal })\))*]; # ()-balanced
6b09c160 201 $cast = qr[(?:\(\s*SV\s*\*\s*\)\s*)?]; # Optional (SV*) cast
202 $size = qr[,\s* (??{ $bal }) ]x; # Third arg (to setpvn)
203
204 foreach my $key (keys %output_expr) {
205 use re 'eval';
206
207 my ($t, $with_size, $arg, $sarg) =
208 ($output_expr{$key} =~
209 m[^ \s+ sv_set ( [iunp] ) v (n)? # Type, is_setpvn
210 \s* \( \s* $cast \$arg \s* ,
211 \s* ( (??{ $bal }) ) # Set from
212 ( (??{ $size }) )? # Possible sizeof set-from
213 \) \s* ; \s* $
214 ]x);
215 $targetable{$key} = [$t, $with_size, $arg, $sarg] if $t;
216 }
217
218 my $END = "!End!\n\n"; # "impossible" keyword (multiple newline)
219
220 # Match an XS keyword
221 $BLOCK_re= '\s*(' . join('|', qw(
222 REQUIRE BOOT CASE PREINIT INPUT INIT CODE PPCODE OUTPUT
223 CLEANUP ALIAS ATTRS PROTOTYPES PROTOTYPE VERSIONCHECK INCLUDE
224 SCOPE INTERFACE INTERFACE_MACRO C_ARGS POSTCALL OVERLOAD FALLBACK
225 )) . "|$END)\\s*:";
226
227
a8adbc99 228 our ($C_group_rex, $C_arg);
6b09c160 229 # Group in C (no support for comments or literals)
230 $C_group_rex = qr/ [({\[]
231 (?: (?> [^()\[\]{}]+ ) | (??{ $C_group_rex }) )*
232 [)}\]] /x ;
233 # Chunk in C without comma at toplevel (no comments):
234 $C_arg = qr/ (?: (?> [^()\[\]{},"']+ )
235 | (??{ $C_group_rex })
236 | " (?: (?> [^\\"]+ )
237 | \\.
238 )* " # String literal
239 | ' (?: (?> [^\\']+ ) | \\. )* ' # Char literal
240 )* /xs;
241
242 # Identify the version of xsubpp used
243 print <<EOM ;
244/*
245 * This file was generated automatically by ExtUtils::ParseXS version $VERSION from the
246 * contents of $filename. Do not edit this file, edit $filename instead.
247 *
248 * ANY CHANGES MADE HERE WILL BE LOST!
249 *
250 */
251
252EOM
253
254
255 print("#line 1 \"$filepathname\"\n")
256 if $WantLineNumbers;
257
258 firstmodule:
259 while (<$FH>) {
260 if (/^=/) {
261 my $podstartline = $.;
262 do {
263 if (/^=cut\s*$/) {
264 # We can't just write out a /* */ comment, as our embedded
265 # POD might itself be in a comment. We can't put a /**/
266 # comment inside #if 0, as the C standard says that the source
267 # file is decomposed into preprocessing characters in the stage
268 # before preprocessing commands are executed.
269 # I don't want to leave the text as barewords, because the spec
270 # isn't clear whether macros are expanded before or after
271 # preprocessing commands are executed, and someone pathological
272 # may just have defined one of the 3 words as a macro that does
273 # something strange. Multiline strings are illegal in C, so
274 # the "" we write must be a string literal. And they aren't
275 # concatenated until 2 steps later, so we are safe.
276 # - Nicholas Clark
277 print("#if 0\n \"Skipped embedded POD.\"\n#endif\n");
278 printf("#line %d \"$filepathname\"\n", $. + 1)
279 if $WantLineNumbers;
280 next firstmodule
281 }
282
283 } while (<$FH>);
284 # At this point $. is at end of file so die won't state the start
285 # of the problem, and as we haven't yet read any lines &death won't
286 # show the correct line in the message either.
287 die ("Error: Unterminated pod in $filename, line $podstartline\n")
288 unless $lastline;
289 }
290 last if ($Package, $Prefix) =
291 /^MODULE\s*=\s*[\w:]+(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/;
292
293 print $_;
294 }
295 unless (defined $_) {
296 warn "Didn't find a 'MODULE ... PACKAGE ... PREFIX' line\n";
297 exit 0; # Not a fatal error for the caller process
298 }
299
300 print <<"EOF";
301#ifndef PERL_UNUSED_VAR
302# define PERL_UNUSED_VAR(var) if (0) var = var
303#endif
304
305EOF
306
307 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $WantLineNumbers;
308
309 $lastline = $_;
310 $lastline_no = $.;
311
312 PARAGRAPH:
313 while (fetch_para()) {
314 # Print initial preprocessor statements and blank lines
315 while (@line && $line[0] !~ /^[^\#]/) {
316 my $line = shift(@line);
317 print $line, "\n";
318 next unless $line =~ /^\#\s*((if)(?:n?def)?|elsif|else|endif)\b/;
319 my $statement = $+;
320 if ($statement eq 'if') {
321 $XSS_work_idx = @XSStack;
322 push(@XSStack, {type => 'if'});
323 } else {
324 death ("Error: `$statement' with no matching `if'")
325 if $XSStack[-1]{type} ne 'if';
326 if ($XSStack[-1]{varname}) {
327 push(@InitFileCode, "#endif\n");
328 push(@BootCode, "#endif");
329 }
330
331 my(@fns) = keys %{$XSStack[-1]{functions}};
332 if ($statement ne 'endif') {
333 # Hide the functions defined in other #if branches, and reset.
334 @{$XSStack[-1]{other_functions}}{@fns} = (1) x @fns;
335 @{$XSStack[-1]}{qw(varname functions)} = ('', {});
336 } else {
337 my($tmp) = pop(@XSStack);
338 0 while (--$XSS_work_idx
339 && $XSStack[$XSS_work_idx]{type} ne 'if');
340 # Keep all new defined functions
341 push(@fns, keys %{$tmp->{other_functions}});
342 @{$XSStack[$XSS_work_idx]{functions}}{@fns} = (1) x @fns;
343 }
344 }
345 }
346
347 next PARAGRAPH unless @line;
348
349 if ($XSS_work_idx && !$XSStack[$XSS_work_idx]{varname}) {
350 # We are inside an #if, but have not yet #defined its xsubpp variable.
351 print "#define $cpp_next_tmp 1\n\n";
352 push(@InitFileCode, "#if $cpp_next_tmp\n");
353 push(@BootCode, "#if $cpp_next_tmp");
354 $XSStack[$XSS_work_idx]{varname} = $cpp_next_tmp++;
355 }
356
357 death ("Code is not inside a function"
358 ." (maybe last function was ended by a blank line "
359 ." followed by a statement on column one?)")
360 if $line[0] =~ /^\s/;
361
008fb49c 362 my ($class, $externC, $static, $elipsis, $wantRETVAL, $RETVAL_no_return);
6b09c160 363 my (@fake_INPUT_pre); # For length(s) generated variables
364 my (@fake_INPUT);
365
366 # initialize info arrays
367 undef(%args_match);
368 undef(%var_types);
369 undef(%defaults);
370 undef(%arg_list) ;
371 undef(@proto_arg) ;
372 undef($processing_arg_with_types) ;
373 undef(%argtype_seen) ;
374 undef(@outlist) ;
375 undef(%in_out) ;
376 undef(%lengthof) ;
377 undef($proto_in_this_xsub) ;
378 undef($scope_in_this_xsub) ;
379 undef($interface);
380 undef($prepush_done);
381 $interface_macro = 'XSINTERFACE_FUNC' ;
382 $interface_macro_set = 'XSINTERFACE_FUNC_SET' ;
383 $ProtoThisXSUB = $WantPrototypes ;
384 $ScopeThisXSUB = 0;
385 $xsreturn = 0;
386
387 $_ = shift(@line);
388 while (my $kwd = check_keyword("REQUIRE|PROTOTYPES|FALLBACK|VERSIONCHECK|INCLUDE")) {
389 &{"${kwd}_handler"}() ;
390 next PARAGRAPH unless @line ;
391 $_ = shift(@line);
392 }
393
394 if (check_keyword("BOOT")) {
395 &check_cpp;
396 push (@BootCode, "#line $line_no[@line_no - @line] \"$filepathname\"")
397 if $WantLineNumbers && $line[0] !~ /^\s*#\s*line\b/;
398 push (@BootCode, @line, "") ;
399 next PARAGRAPH ;
400 }
401
402
403 # extract return type, function name and arguments
404 ($ret_type) = TidyType($_);
405 $RETVAL_no_return = 1 if $ret_type =~ s/^NO_OUTPUT\s+//;
406
407 # Allow one-line ANSI-like declaration
408 unshift @line, $2
409 if $process_argtypes
410 and $ret_type =~ s/^(.*?\w.*?)\s*\b(\w+\s*\(.*)/$1/s;
411
412 # a function definition needs at least 2 lines
413 blurt ("Error: Function definition too short '$ret_type'"), next PARAGRAPH
414 unless @line ;
415
008fb49c 416 $externC = 1 if $ret_type =~ s/^extern "C"\s+//;
417 $static = 1 if $ret_type =~ s/^static\s+//;
6b09c160 418
419 $func_header = shift(@line);
420 blurt ("Error: Cannot parse function definition from '$func_header'"), next PARAGRAPH
421 unless $func_header =~ /^(?:([\w:]*)::)?(\w+)\s*\(\s*(.*?)\s*\)\s*(const)?\s*(;\s*)?$/s;
422
423 ($class, $func_name, $orig_args) = ($1, $2, $3) ;
424 $class = "$4 $class" if $4;
425 ($pname = $func_name) =~ s/^($Prefix)?/$Packprefix/;
426 ($clean_func_name = $func_name) =~ s/^$Prefix//;
427 $Full_func_name = "${Packid}_$clean_func_name";
428 if ($Is_VMS) {
429 $Full_func_name = $SymSet->addsym($Full_func_name);
430 }
431
432 # Check for duplicate function definition
433 for my $tmp (@XSStack) {
434 next unless defined $tmp->{functions}{$Full_func_name};
435 Warn("Warning: duplicate function definition '$clean_func_name' detected");
436 last;
437 }
438 $XSStack[$XSS_work_idx]{functions}{$Full_func_name} ++ ;
439 %XsubAliases = %XsubAliasValues = %Interfaces = @Attributes = ();
440 $DoSetMagic = 1;
441
442 $orig_args =~ s/\\\s*/ /g; # process line continuations
443 my @args;
444
445 my %only_C_inlist; # Not in the signature of Perl function
446 if ($process_argtypes and $orig_args =~ /\S/) {
447 my $args = "$orig_args ,";
448 if ($args =~ /^( (??{ $C_arg }) , )* $ /x) {
449 @args = ($args =~ /\G ( (??{ $C_arg }) ) , /xg);
450 for ( @args ) {
451 s/^\s+//;
452 s/\s+$//;
453 my ($arg, $default) = / ( [^=]* ) ( (?: = .* )? ) /x;
454 my ($pre, $name) = ($arg =~ /(.*?) \s*
455 \b ( \w+ | length\( \s*\w+\s* \) )
456 \s* $ /x);
457 next unless defined($pre) && length($pre);
458 my $out_type;
459 my $inout_var;
460 if ($process_inout and s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//) {
461 my $type = $1;
462 $out_type = $type if $type ne 'IN';
463 $arg =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//;
464 $pre =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//;
465 }
466 my $islength;
467 if ($name =~ /^length\( \s* (\w+) \s* \)\z/x) {
468 $name = "XSauto_length_of_$1";
469 $islength = 1;
470 die "Default value on length() argument: `$_'"
471 if length $default;
472 }
473 if (length $pre or $islength) { # Has a type
474 if ($islength) {
475 push @fake_INPUT_pre, $arg;
476 } else {
477 push @fake_INPUT, $arg;
478 }
479 # warn "pushing '$arg'\n";
480 $argtype_seen{$name}++;
481 $_ = "$name$default"; # Assigns to @args
482 }
483 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST" or $islength;
484 push @outlist, $name if $out_type =~ /OUTLIST$/;
485 $in_out{$name} = $out_type if $out_type;
486 }
487 } else {
488 @args = split(/\s*,\s*/, $orig_args);
489 Warn("Warning: cannot parse argument list '$orig_args', fallback to split");
490 }
491 } else {
492 @args = split(/\s*,\s*/, $orig_args);
493 for (@args) {
494 if ($process_inout and s/^(IN|IN_OUTLIST|OUTLIST|IN_OUT|OUT)\s+//) {
495 my $out_type = $1;
496 next if $out_type eq 'IN';
497 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST";
498 push @outlist, $name if $out_type =~ /OUTLIST$/;
499 $in_out{$_} = $out_type;
500 }
501 }
502 }
503 if (defined($class)) {
504 my $arg0 = ((defined($static) or $func_name eq 'new')
505 ? "CLASS" : "THIS");
506 unshift(@args, $arg0);
507 ($report_args = "$arg0, $report_args") =~ s/^\w+, $/$arg0/;
508 }
509 my $extra_args = 0;
510 @args_num = ();
511 $num_args = 0;
512 my $report_args = '';
513 foreach my $i (0 .. $#args) {
514 if ($args[$i] =~ s/\.\.\.//) {
515 $elipsis = 1;
516 if ($args[$i] eq '' && $i == $#args) {
517 $report_args .= ", ...";
518 pop(@args);
519 last;
520 }
521 }
522 if ($only_C_inlist{$args[$i]}) {
523 push @args_num, undef;
524 } else {
525 push @args_num, ++$num_args;
526 $report_args .= ", $args[$i]";
527 }
528 if ($args[$i] =~ /^([^=]*[^\s=])\s*=\s*(.*)/s) {
529 $extra_args++;
530 $args[$i] = $1;
531 $defaults{$args[$i]} = $2;
532 $defaults{$args[$i]} =~ s/"/\\"/g;
533 }
534 $proto_arg[$i+1] = '$' ;
535 }
536 $min_args = $num_args - $extra_args;
537 $report_args =~ s/"/\\"/g;
538 $report_args =~ s/^,\s+//;
539 my @func_args = @args;
540 shift @func_args if defined($class);
541
542 for (@func_args) {
543 s/^/&/ if $in_out{$_};
544 }
545 $func_args = join(", ", @func_args);
546 @args_match{@args} = @args_num;
547
548 $PPCODE = grep(/^\s*PPCODE\s*:/, @line);
549 $CODE = grep(/^\s*CODE\s*:/, @line);
550 # Detect CODE: blocks which use ST(n)= or XST_m*(n,v)
551 # to set explicit return values.
552 $EXPLICIT_RETURN = ($CODE &&
553 ("@line" =~ /(\bST\s*\([^;]*=) | (\bXST_m\w+\s*\()/x ));
554 $ALIAS = grep(/^\s*ALIAS\s*:/, @line);
555 $INTERFACE = grep(/^\s*INTERFACE\s*:/, @line);
556
557 $xsreturn = 1 if $EXPLICIT_RETURN;
558
008fb49c 559 $externC = $externC ? qq[extern "C"] : "";
560
6b09c160 561 # print function header
562 print Q(<<"EOF");
008fb49c 563#$externC
6b09c160 564#XS(XS_${Full_func_name}); /* prototype to pass -Wmissing-prototypes */
565#XS(XS_${Full_func_name})
566#[[
567# dXSARGS;
568EOF
569 print Q(<<"EOF") if $ALIAS ;
570# dXSI32;
571EOF
572 print Q(<<"EOF") if $INTERFACE ;
573# dXSFUNCTION($ret_type);
574EOF
575 if ($elipsis) {
576 $cond = ($min_args ? qq(items < $min_args) : 0);
577 } elsif ($min_args == $num_args) {
578 $cond = qq(items != $min_args);
579 } else {
580 $cond = qq(items < $min_args || items > $num_args);
581 }
582
583 print Q(<<"EOF") if $except;
584# char errbuf[1024];
585# *errbuf = '\0';
586EOF
587
588 if ($ALIAS)
589 { print Q(<<"EOF") if $cond }
590# if ($cond)
591# Perl_croak(aTHX_ "Usage: %s($report_args)", GvNAME(CvGV(cv)));
592EOF
593 else
594 { print Q(<<"EOF") if $cond }
595# if ($cond)
596# Perl_croak(aTHX_ "Usage: $pname($report_args)");
597EOF
598
599 # cv doesn't seem to be used, in most cases unless we go in
600 # the if of this else
601 print Q(<<"EOF");
602# PERL_UNUSED_VAR(cv); /* -W */
603EOF
604
605 #gcc -Wall: if an xsub has PPCODE is used
606 #it is possible none of ST, XSRETURN or XSprePUSH macros are used
607 #hence `ax' (setup by dXSARGS) is unused
608 #XXX: could breakup the dXSARGS; into dSP;dMARK;dITEMS
609 #but such a move could break third-party extensions
610 print Q(<<"EOF") if $PPCODE;
611# PERL_UNUSED_VAR(ax); /* -Wall */
612EOF
613
614 print Q(<<"EOF") if $PPCODE;
615# SP -= items;
616EOF
617
618 # Now do a block of some sort.
619
620 $condnum = 0;
621 $cond = ''; # last CASE: condidional
622 push(@line, "$END:");
623 push(@line_no, $line_no[-1]);
624 $_ = '';
625 &check_cpp;
626 while (@line) {
627 &CASE_handler if check_keyword("CASE");
628 print Q(<<"EOF");
629# $except [[
630EOF
631
632 # do initialization of input variables
633 $thisdone = 0;
634 $retvaldone = 0;
635 $deferred = "";
636 %arg_list = () ;
637 $gotRETVAL = 0;
638
639 INPUT_handler() ;
640 process_keyword("INPUT|PREINIT|INTERFACE_MACRO|C_ARGS|ALIAS|ATTRS|PROTOTYPE|SCOPE|OVERLOAD") ;
641
642 print Q(<<"EOF") if $ScopeThisXSUB;
643# ENTER;
644# [[
645EOF
646
647 if (!$thisdone && defined($class)) {
648 if (defined($static) or $func_name eq 'new') {
649 print "\tchar *";
650 $var_types{"CLASS"} = "char *";
651 &generate_init("char *", 1, "CLASS");
652 }
653 else {
654 print "\t$class *";
655 $var_types{"THIS"} = "$class *";
656 &generate_init("$class *", 1, "THIS");
657 }
658 }
659
660 # do code
661 if (/^\s*NOT_IMPLEMENTED_YET/) {
662 print "\n\tPerl_croak(aTHX_ \"$pname: not implemented yet\");\n";
663 $_ = '' ;
664 } else {
665 if ($ret_type ne "void") {
666 print "\t" . &map_type($ret_type, 'RETVAL') . ";\n"
667 if !$retvaldone;
668 $args_match{"RETVAL"} = 0;
669 $var_types{"RETVAL"} = $ret_type;
670 print "\tdXSTARG;\n"
671 if $WantOptimize and $targetable{$type_kind{$ret_type}};
672 }
673
674 if (@fake_INPUT or @fake_INPUT_pre) {
675 unshift @line, @fake_INPUT_pre, @fake_INPUT, $_;
676 $_ = "";
677 $processing_arg_with_types = 1;
678 INPUT_handler() ;
679 }
680 print $deferred;
681
682 process_keyword("INIT|ALIAS|ATTRS|PROTOTYPE|INTERFACE_MACRO|INTERFACE|C_ARGS|OVERLOAD") ;
683
684 if (check_keyword("PPCODE")) {
685 print_section();
686 death ("PPCODE must be last thing") if @line;
687 print "\tLEAVE;\n" if $ScopeThisXSUB;
688 print "\tPUTBACK;\n\treturn;\n";
689 } elsif (check_keyword("CODE")) {
690 print_section() ;
691 } elsif (defined($class) and $func_name eq "DESTROY") {
692 print "\n\t";
693 print "delete THIS;\n";
694 } else {
695 print "\n\t";
696 if ($ret_type ne "void") {
697 print "RETVAL = ";
698 $wantRETVAL = 1;
699 }
700 if (defined($static)) {
701 if ($func_name eq 'new') {
702 $func_name = "$class";
703 } else {
704 print "${class}::";
705 }
706 } elsif (defined($class)) {
707 if ($func_name eq 'new') {
708 $func_name .= " $class";
709 } else {
710 print "THIS->";
711 }
712 }
713 $func_name =~ s/^\Q$args{'s'}//
714 if exists $args{'s'};
715 $func_name = 'XSFUNCTION' if $interface;
716 print "$func_name($func_args);\n";
717 }
718 }
719
720 # do output variables
721 $gotRETVAL = 0; # 1 if RETVAL seen in OUTPUT section;
722 undef $RETVAL_code ; # code to set RETVAL (from OUTPUT section);
723 # $wantRETVAL set if 'RETVAL =' autogenerated
724 ($wantRETVAL, $ret_type) = (0, 'void') if $RETVAL_no_return;
725 undef %outargs ;
726 process_keyword("POSTCALL|OUTPUT|ALIAS|ATTRS|PROTOTYPE|OVERLOAD");
727
728 &generate_output($var_types{$_}, $args_match{$_}, $_, $DoSetMagic)
729 for grep $in_out{$_} =~ /OUT$/, keys %in_out;
730
731 # all OUTPUT done, so now push the return value on the stack
732 if ($gotRETVAL && $RETVAL_code) {
733 print "\t$RETVAL_code\n";
734 } elsif ($gotRETVAL || $wantRETVAL) {
735 my $t = $WantOptimize && $targetable{$type_kind{$ret_type}};
736 my $var = 'RETVAL';
737 my $type = $ret_type;
738
739 # 0: type, 1: with_size, 2: how, 3: how_size
740 if ($t and not $t->[1] and $t->[0] eq 'p') {
741 # PUSHp corresponds to setpvn. Treate setpv directly
742 my $what = eval qq("$t->[2]");
743 warn $@ if $@;
744
745 print "\tsv_setpv(TARG, $what); XSprePUSH; PUSHTARG;\n";
746 $prepush_done = 1;
747 }
748 elsif ($t) {
749 my $what = eval qq("$t->[2]");
750 warn $@ if $@;
751
752 my $size = $t->[3];
753 $size = '' unless defined $size;
754 $size = eval qq("$size");
755 warn $@ if $@;
756 print "\tXSprePUSH; PUSH$t->[0]($what$size);\n";
757 $prepush_done = 1;
758 }
759 else {
760 # RETVAL almost never needs SvSETMAGIC()
761 &generate_output($ret_type, 0, 'RETVAL', 0);
762 }
763 }
764
765 $xsreturn = 1 if $ret_type ne "void";
766 my $num = $xsreturn;
767 my $c = @outlist;
768 print "\tXSprePUSH;" if $c and not $prepush_done;
769 print "\tEXTEND(SP,$c);\n" if $c;
770 $xsreturn += $c;
771 generate_output($var_types{$_}, $num++, $_, 0, 1) for @outlist;
772
773 # do cleanup
774 process_keyword("CLEANUP|ALIAS|ATTRS|PROTOTYPE|OVERLOAD") ;
775
776 print Q(<<"EOF") if $ScopeThisXSUB;
777# ]]
778EOF
779 print Q(<<"EOF") if $ScopeThisXSUB and not $PPCODE;
780# LEAVE;
781EOF
782
783 # print function trailer
784 print Q(<<"EOF");
785# ]]
786EOF
787 print Q(<<"EOF") if $except;
788# BEGHANDLERS
789# CATCHALL
790# sprintf(errbuf, "%s: %s\\tpropagated", Xname, Xreason);
791# ENDHANDLERS
792EOF
793 if (check_keyword("CASE")) {
794 blurt ("Error: No `CASE:' at top of function")
795 unless $condnum;
796 $_ = "CASE: $_"; # Restore CASE: label
797 next;
798 }
799 last if $_ eq "$END:";
800 death(/^$BLOCK_re/o ? "Misplaced `$1:'" : "Junk at end of function");
801 }
802
803 print Q(<<"EOF") if $except;
804# if (errbuf[0])
805# Perl_croak(aTHX_ errbuf);
806EOF
807
808 if ($xsreturn) {
809 print Q(<<"EOF") unless $PPCODE;
810# XSRETURN($xsreturn);
811EOF
812 } else {
813 print Q(<<"EOF") unless $PPCODE;
814# XSRETURN_EMPTY;
815EOF
816 }
817
818 print Q(<<"EOF");
819#]]
820#
821EOF
822
823 my $newXS = "newXS" ;
824 my $proto = "" ;
825
826 # Build the prototype string for the xsub
827 if ($ProtoThisXSUB) {
828 $newXS = "newXSproto";
829
830 if ($ProtoThisXSUB eq 2) {
831 # User has specified empty prototype
832 }
833 elsif ($ProtoThisXSUB eq 1) {
834 my $s = ';';
835 if ($min_args < $num_args) {
836 $s = '';
837 $proto_arg[$min_args] .= ";" ;
838 }
839 push @proto_arg, "$s\@"
840 if $elipsis ;
841
842 $proto = join ("", grep defined, @proto_arg);
843 }
844 else {
845 # User has specified a prototype
846 $proto = $ProtoThisXSUB;
847 }
848 $proto = qq{, "$proto"};
849 }
850
851 if (%XsubAliases) {
852 $XsubAliases{$pname} = 0
853 unless defined $XsubAliases{$pname} ;
854 while ( ($name, $value) = each %XsubAliases) {
855 push(@InitFileCode, Q(<<"EOF"));
856# cv = newXS(\"$name\", XS_$Full_func_name, file);
857# XSANY.any_i32 = $value ;
858EOF
859 push(@InitFileCode, Q(<<"EOF")) if $proto;
860# sv_setpv((SV*)cv$proto) ;
861EOF
862 }
863 }
864 elsif (@Attributes) {
865 push(@InitFileCode, Q(<<"EOF"));
866# cv = newXS(\"$pname\", XS_$Full_func_name, file);
867# apply_attrs_string("$Package", cv, "@Attributes", 0);
868EOF
869 }
870 elsif ($interface) {
871 while ( ($name, $value) = each %Interfaces) {
872 $name = "$Package\::$name" unless $name =~ /::/;
873 push(@InitFileCode, Q(<<"EOF"));
874# cv = newXS(\"$name\", XS_$Full_func_name, file);
875# $interface_macro_set(cv,$value) ;
876EOF
877 push(@InitFileCode, Q(<<"EOF")) if $proto;
878# sv_setpv((SV*)cv$proto) ;
879EOF
880 }
881 }
882 else {
883 push(@InitFileCode,
884 " ${newXS}(\"$pname\", XS_$Full_func_name, file$proto);\n");
885 }
886 }
887
888 if ($Overload) # make it findable with fetchmethod
889 {
890 print Q(<<"EOF");
891#XS(XS_${Packid}_nil); /* prototype to pass -Wmissing-prototypes */
892#XS(XS_${Packid}_nil)
893#{
894# XSRETURN_EMPTY;
895#}
896#
897EOF
898 unshift(@InitFileCode, <<"MAKE_FETCHMETHOD_WORK");
899 /* Making a sub named "${Package}::()" allows the package */
900 /* to be findable via fetchmethod(), and causes */
901 /* overload::Overloaded("${Package}") to return true. */
902 newXS("${Package}::()", XS_${Packid}_nil, file$proto);
903MAKE_FETCHMETHOD_WORK
904 }
905
906 # print initialization routine
907
908 print Q(<<"EOF");
909##ifdef __cplusplus
910#extern "C"
911##endif
912EOF
913
914 print Q(<<"EOF");
915#XS(boot_$Module_cname); /* prototype to pass -Wmissing-prototypes */
916#XS(boot_$Module_cname)
917EOF
918
919 print Q(<<"EOF");
920#[[
921# dXSARGS;
922EOF
923
924 #-Wall: if there is no $Full_func_name there are no xsubs in this .xs
925 #so `file' is unused
926 print Q(<<"EOF") if $Full_func_name;
927# char* file = __FILE__;
928EOF
929
930 print Q("#\n");
931
932 print Q(<<"EOF");
933# PERL_UNUSED_VAR(cv); /* -W */
934# PERL_UNUSED_VAR(items); /* -W */
935EOF
936
937 print Q(<<"EOF") if $WantVersionChk ;
938# XS_VERSION_BOOTCHECK ;
939#
940EOF
941
942 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces ;
943# {
944# CV * cv ;
945#
946EOF
947
948 print Q(<<"EOF") if ($Overload);
949# /* register the overloading (type 'A') magic */
950# PL_amagic_generation++;
951# /* The magic for overload gets a GV* via gv_fetchmeth as */
952# /* mentioned above, and looks in the SV* slot of it for */
953# /* the "fallback" status. */
954# sv_setsv(
955# get_sv( "${Package}::()", TRUE ),
956# $Fallback
957# );
958EOF
959
960 print @InitFileCode;
961
962 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces ;
963# }
964EOF
965
966 if (@BootCode)
967 {
968 print "\n /* Initialisation Section */\n\n" ;
969 @line = @BootCode;
970 print_section();
971 print "\n /* End of Initialisation Section */\n\n" ;
972 }
973
974 print Q(<<"EOF");
975# XSRETURN_YES;
976#]]
977#
978EOF
979
980 warn("Please specify prototyping behavior for $filename (see perlxs manual)\n")
981 unless $ProtoUsed ;
982
983 chdir($orig_cwd);
984 select($orig_fh);
985 untie *PSEUDO_STDOUT if tied *PSEUDO_STDOUT;
986
987 return 1;
988}
989
990sub errors { $errors }
991
992sub standard_typemap_locations {
993 # Add all the default typemap locations to the search path
994 my @tm = qw(typemap);
995
996 my $updir = File::Spec->updir;
997 foreach my $dir (File::Spec->catdir(($updir) x 1), File::Spec->catdir(($updir) x 2),
998 File::Spec->catdir(($updir) x 3), File::Spec->catdir(($updir) x 4)) {
999
1000 unshift @tm, File::Spec->catfile($dir, 'typemap');
1001 unshift @tm, File::Spec->catfile($dir, lib => ExtUtils => 'typemap');
1002 }
1003 foreach my $dir (@INC) {
1004 my $file = File::Spec->catfile($dir, ExtUtils => 'typemap');
1005 unshift @tm, $file if -e $file;
1006 }
1007 return @tm;
1008}
1009
1010sub TrimWhitespace
1011{
1012 $_[0] =~ s/^\s+|\s+$//go ;
1013}
1014
1015sub TidyType
1016 {
1017 local ($_) = @_ ;
1018
1019 # rationalise any '*' by joining them into bunches and removing whitespace
1020 s#\s*(\*+)\s*#$1#g;
1021 s#(\*+)# $1 #g ;
1022
1023 # change multiple whitespace into a single space
1024 s/\s+/ /g ;
1025
1026 # trim leading & trailing whitespace
1027 TrimWhitespace($_) ;
1028
1029 $_ ;
1030}
1031
1032# Input: ($_, @line) == unparsed input.
1033# Output: ($_, @line) == (rest of line, following lines).
1034# Return: the matched keyword if found, otherwise 0
1035sub check_keyword {
1036 $_ = shift(@line) while !/\S/ && @line;
1037 s/^(\s*)($_[0])\s*:\s*(?:#.*)?/$1/s && $2;
1038}
1039
1040sub print_section {
1041 # the "do" is required for right semantics
1042 do { $_ = shift(@line) } while !/\S/ && @line;
1043
1044 print("#line ", $line_no[@line_no - @line -1], " \"$filepathname\"\n")
1045 if $WantLineNumbers && !/^\s*#\s*line\b/ && !/^#if XSubPPtmp/;
1046 for (; defined($_) && !/^$BLOCK_re/o; $_ = shift(@line)) {
1047 print "$_\n";
1048 }
1049 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $WantLineNumbers;
1050}
1051
1052sub merge_section {
1053 my $in = '';
1054
1055 while (!/\S/ && @line) {
1056 $_ = shift(@line);
1057 }
1058
1059 for (; defined($_) && !/^$BLOCK_re/o; $_ = shift(@line)) {
1060 $in .= "$_\n";
1061 }
1062 chomp $in;
1063 return $in;
1064 }
1065
1066sub process_keyword($)
1067 {
1068 my($pattern) = @_ ;
1069 my $kwd ;
1070
1071 &{"${kwd}_handler"}()
1072 while $kwd = check_keyword($pattern) ;
1073 }
1074
1075sub CASE_handler {
1076 blurt ("Error: `CASE:' after unconditional `CASE:'")
1077 if $condnum && $cond eq '';
1078 $cond = $_;
1079 TrimWhitespace($cond);
1080 print " ", ($condnum++ ? " else" : ""), ($cond ? " if ($cond)\n" : "\n");
1081 $_ = '' ;
1082}
1083
1084sub INPUT_handler {
1085 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1086 last if /^\s*NOT_IMPLEMENTED_YET/;
1087 next unless /\S/; # skip blank lines
1088
1089 TrimWhitespace($_) ;
1090 my $line = $_ ;
1091
1092 # remove trailing semicolon if no initialisation
1093 s/\s*;$//g unless /[=;+].*\S/ ;
1094
1095 # Process the length(foo) declarations
1096 if (s/^([^=]*)\blength\(\s*(\w+)\s*\)\s*$/$1 XSauto_length_of_$2=NO_INIT/x) {
1097 print "\tSTRLEN\tSTRLEN_length_of_$2;\n";
1098 $lengthof{$2} = $name;
1099 # $islengthof{$name} = $1;
1100 $deferred .= "\n\tXSauto_length_of_$2 = STRLEN_length_of_$2;";
1101 }
1102
1103 # check for optional initialisation code
1104 my $var_init = '' ;
1105 $var_init = $1 if s/\s*([=;+].*)$//s ;
1106 $var_init =~ s/"/\\"/g;
1107
1108 s/\s+/ /g;
1109 my ($var_type, $var_addr, $var_name) = /^(.*?[^&\s])\s*(\&?)\s*\b(\w+)$/s
1110 or blurt("Error: invalid argument declaration '$line'"), next;
1111
1112 # Check for duplicate definitions
1113 blurt ("Error: duplicate definition of argument '$var_name' ignored"), next
1114 if $arg_list{$var_name}++
1115 or defined $argtype_seen{$var_name} and not $processing_arg_with_types;
1116
1117 $thisdone |= $var_name eq "THIS";
1118 $retvaldone |= $var_name eq "RETVAL";
1119 $var_types{$var_name} = $var_type;
1120 # XXXX This check is a safeguard against the unfinished conversion of
1121 # generate_init(). When generate_init() is fixed,
1122 # one can use 2-args map_type() unconditionally.
1123 if ($var_type =~ / \( \s* \* \s* \) /x) {
1124 # Function pointers are not yet supported with &output_init!
1125 print "\t" . &map_type($var_type, $var_name);
1126 $name_printed = 1;
1127 } else {
1128 print "\t" . &map_type($var_type);
1129 $name_printed = 0;
1130 }
1131 $var_num = $args_match{$var_name};
1132
1133 $proto_arg[$var_num] = ProtoString($var_type)
1134 if $var_num ;
1135 $func_args =~ s/\b($var_name)\b/&$1/ if $var_addr;
1136 if ($var_init =~ /^[=;]\s*NO_INIT\s*;?\s*$/
1137 or $in_out{$var_name} and $in_out{$var_name} =~ /^OUT/
1138 and $var_init !~ /\S/) {
1139 if ($name_printed) {
1140 print ";\n";
1141 } else {
1142 print "\t$var_name;\n";
1143 }
1144 } elsif ($var_init =~ /\S/) {
1145 &output_init($var_type, $var_num, $var_name, $var_init, $name_printed);
1146 } elsif ($var_num) {
1147 # generate initialization code
1148 &generate_init($var_type, $var_num, $var_name, $name_printed);
1149 } else {
1150 print ";\n";
1151 }
1152 }
1153}
1154
1155sub OUTPUT_handler {
1156 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1157 next unless /\S/;
1158 if (/^\s*SETMAGIC\s*:\s*(ENABLE|DISABLE)\s*/) {
1159 $DoSetMagic = ($1 eq "ENABLE" ? 1 : 0);
1160 next;
1161 }
1162 my ($outarg, $outcode) = /^\s*(\S+)\s*(.*?)\s*$/s ;
1163 blurt ("Error: duplicate OUTPUT argument '$outarg' ignored"), next
1164 if $outargs{$outarg} ++ ;
1165 if (!$gotRETVAL and $outarg eq 'RETVAL') {
1166 # deal with RETVAL last
1167 $RETVAL_code = $outcode ;
1168 $gotRETVAL = 1 ;
1169 next ;
1170 }
1171 blurt ("Error: OUTPUT $outarg not an argument"), next
1172 unless defined($args_match{$outarg});
1173 blurt("Error: No input definition for OUTPUT argument '$outarg' - ignored"), next
1174 unless defined $var_types{$outarg} ;
1175 $var_num = $args_match{$outarg};
1176 if ($outcode) {
1177 print "\t$outcode\n";
1178 print "\tSvSETMAGIC(ST(" , $var_num-1 , "));\n" if $DoSetMagic;
1179 } else {
1180 &generate_output($var_types{$outarg}, $var_num, $outarg, $DoSetMagic);
1181 }
1182 delete $in_out{$outarg} # No need to auto-OUTPUT
1183 if exists $in_out{$outarg} and $in_out{$outarg} =~ /OUT$/;
1184 }
1185}
1186
1187sub C_ARGS_handler() {
1188 my $in = merge_section();
1189
1190 TrimWhitespace($in);
1191 $func_args = $in;
1192}
1193
1194sub INTERFACE_MACRO_handler() {
1195 my $in = merge_section();
1196
1197 TrimWhitespace($in);
1198 if ($in =~ /\s/) { # two
1199 ($interface_macro, $interface_macro_set) = split ' ', $in;
1200 } else {
1201 $interface_macro = $in;
1202 $interface_macro_set = 'UNKNOWN_CVT'; # catch later
1203 }
1204 $interface = 1; # local
1205 $Interfaces = 1; # global
1206}
1207
1208sub INTERFACE_handler() {
1209 my $in = merge_section();
1210
1211 TrimWhitespace($in);
1212
1213 foreach (split /[\s,]+/, $in) {
1214 $Interfaces{$_} = $_;
1215 }
1216 print Q(<<"EOF");
1217# XSFUNCTION = $interface_macro($ret_type,cv,XSANY.any_dptr);
1218EOF
1219 $interface = 1; # local
1220 $Interfaces = 1; # global
1221}
1222
1223sub CLEANUP_handler() { print_section() }
1224sub PREINIT_handler() { print_section() }
1225sub POSTCALL_handler() { print_section() }
1226sub INIT_handler() { print_section() }
1227
1228sub GetAliases
1229 {
1230 my ($line) = @_ ;
1231 my ($orig) = $line ;
1232 my ($alias) ;
1233 my ($value) ;
1234
1235 # Parse alias definitions
1236 # format is
1237 # alias = value alias = value ...
1238
1239 while ($line =~ s/^\s*([\w:]+)\s*=\s*(\w+)\s*//) {
1240 $alias = $1 ;
1241 $orig_alias = $alias ;
1242 $value = $2 ;
1243
1244 # check for optional package definition in the alias
1245 $alias = $Packprefix . $alias if $alias !~ /::/ ;
1246
1247 # check for duplicate alias name & duplicate value
1248 Warn("Warning: Ignoring duplicate alias '$orig_alias'")
1249 if defined $XsubAliases{$alias} ;
1250
1251 Warn("Warning: Aliases '$orig_alias' and '$XsubAliasValues{$value}' have identical values")
1252 if $XsubAliasValues{$value} ;
1253
1254 $XsubAliases = 1;
1255 $XsubAliases{$alias} = $value ;
1256 $XsubAliasValues{$value} = $orig_alias ;
1257 }
1258
1259 blurt("Error: Cannot parse ALIAS definitions from '$orig'")
1260 if $line ;
1261 }
1262
1263sub ATTRS_handler ()
1264 {
1265 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1266 next unless /\S/;
1267 TrimWhitespace($_) ;
1268 push @Attributes, $_;
1269 }
1270 }
1271
1272sub ALIAS_handler ()
1273 {
1274 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1275 next unless /\S/;
1276 TrimWhitespace($_) ;
1277 GetAliases($_) if $_ ;
1278 }
1279 }
1280
1281sub OVERLOAD_handler()
1282{
1283 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1284 next unless /\S/;
1285 TrimWhitespace($_) ;
1286 while ( s/^\s*([\w:"\\)\+\-\*\/\%\<\>\.\&\|\^\!\~\{\}\=]+)\s*//) {
1287 $Overload = 1 unless $Overload;
1288 my $overload = "$Package\::(".$1 ;
1289 push(@InitFileCode,
1290 " newXS(\"$overload\", XS_$Full_func_name, file$proto);\n");
1291 }
1292 }
1293}
1294
1295sub FALLBACK_handler()
1296{
1297 # the rest of the current line should contain either TRUE,
1298 # FALSE or UNDEF
1299
1300 TrimWhitespace($_) ;
1301 my %map = (
1302 TRUE => "PL_sv_yes", 1 => "PL_sv_yes",
1303 FALSE => "PL_sv_no", 0 => "PL_sv_no",
1304 UNDEF => "PL_sv_undef",
1305 ) ;
1306
1307 # check for valid FALLBACK value
1308 death ("Error: FALLBACK: TRUE/FALSE/UNDEF") unless exists $map{uc $_} ;
1309
1310 $Fallback = $map{uc $_} ;
1311}
1312
1313
1314sub REQUIRE_handler ()
1315 {
1316 # the rest of the current line should contain a version number
1317 my ($Ver) = $_ ;
1318
1319 TrimWhitespace($Ver) ;
1320
1321 death ("Error: REQUIRE expects a version number")
1322 unless $Ver ;
1323
1324 # check that the version number is of the form n.n
1325 death ("Error: REQUIRE: expected a number, got '$Ver'")
1326 unless $Ver =~ /^\d+(\.\d*)?/ ;
1327
1328 death ("Error: xsubpp $Ver (or better) required--this is only $VERSION.")
1329 unless $VERSION >= $Ver ;
1330 }
1331
1332sub VERSIONCHECK_handler ()
1333 {
1334 # the rest of the current line should contain either ENABLE or
1335 # DISABLE
1336
1337 TrimWhitespace($_) ;
1338
1339 # check for ENABLE/DISABLE
1340 death ("Error: VERSIONCHECK: ENABLE/DISABLE")
1341 unless /^(ENABLE|DISABLE)/i ;
1342
1343 $WantVersionChk = 1 if $1 eq 'ENABLE' ;
1344 $WantVersionChk = 0 if $1 eq 'DISABLE' ;
1345
1346 }
1347
1348sub PROTOTYPE_handler ()
1349 {
1350 my $specified ;
1351
1352 death("Error: Only 1 PROTOTYPE definition allowed per xsub")
1353 if $proto_in_this_xsub ++ ;
1354
1355 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1356 next unless /\S/;
1357 $specified = 1 ;
1358 TrimWhitespace($_) ;
1359 if ($_ eq 'DISABLE') {
1360 $ProtoThisXSUB = 0
1361 } elsif ($_ eq 'ENABLE') {
1362 $ProtoThisXSUB = 1
1363 } else {
1364 # remove any whitespace
1365 s/\s+//g ;
1366 death("Error: Invalid prototype '$_'")
1367 unless ValidProtoString($_) ;
1368 $ProtoThisXSUB = C_string($_) ;
1369 }
1370 }
1371
1372 # If no prototype specified, then assume empty prototype ""
1373 $ProtoThisXSUB = 2 unless $specified ;
1374
1375 $ProtoUsed = 1 ;
1376
1377 }
1378
1379sub SCOPE_handler ()
1380 {
1381 death("Error: Only 1 SCOPE declaration allowed per xsub")
1382 if $scope_in_this_xsub ++ ;
1383
1384 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1385 next unless /\S/;
1386 TrimWhitespace($_) ;
1387 if ($_ =~ /^DISABLE/i) {
1388 $ScopeThisXSUB = 0
1389 } elsif ($_ =~ /^ENABLE/i) {
1390 $ScopeThisXSUB = 1
1391 }
1392 }
1393
1394 }
1395
1396sub PROTOTYPES_handler ()
1397 {
1398 # the rest of the current line should contain either ENABLE or
1399 # DISABLE
1400
1401 TrimWhitespace($_) ;
1402
1403 # check for ENABLE/DISABLE
1404 death ("Error: PROTOTYPES: ENABLE/DISABLE")
1405 unless /^(ENABLE|DISABLE)/i ;
1406
1407 $WantPrototypes = 1 if $1 eq 'ENABLE' ;
1408 $WantPrototypes = 0 if $1 eq 'DISABLE' ;
1409 $ProtoUsed = 1 ;
1410
1411 }
1412
1413sub INCLUDE_handler ()
1414 {
1415 # the rest of the current line should contain a valid filename
1416
1417 TrimWhitespace($_) ;
1418
1419 death("INCLUDE: filename missing")
1420 unless $_ ;
1421
1422 death("INCLUDE: output pipe is illegal")
1423 if /^\s*\|/ ;
1424
1425 # simple minded recursion detector
1426 death("INCLUDE loop detected")
1427 if $IncludedFiles{$_} ;
1428
1429 ++ $IncludedFiles{$_} unless /\|\s*$/ ;
1430
1431 # Save the current file context.
1432 push(@XSStack, {
1433 type => 'file',
1434 LastLine => $lastline,
1435 LastLineNo => $lastline_no,
1436 Line => \@line,
1437 LineNo => \@line_no,
1438 Filename => $filename,
1439 Handle => $FH,
1440 }) ;
1441
1442 ++ $FH ;
1443
1444 # open the new file
1445 open ($FH, "$_") or death("Cannot open '$_': $!") ;
1446
1447 print Q(<<"EOF");
1448#
1449#/* INCLUDE: Including '$_' from '$filename' */
1450#
1451EOF
1452
1453 $filename = $_ ;
1454
1455 # Prime the pump by reading the first
1456 # non-blank line
1457
1458 # skip leading blank lines
1459 while (<$FH>) {
1460 last unless /^\s*$/ ;
1461 }
1462
1463 $lastline = $_ ;
1464 $lastline_no = $. ;
1465
1466 }
1467
1468sub PopFile()
1469 {
1470 return 0 unless $XSStack[-1]{type} eq 'file' ;
1471
1472 my $data = pop @XSStack ;
1473 my $ThisFile = $filename ;
1474 my $isPipe = ($filename =~ /\|\s*$/) ;
1475
1476 -- $IncludedFiles{$filename}
1477 unless $isPipe ;
1478
1479 close $FH ;
1480
1481 $FH = $data->{Handle} ;
1482 $filename = $data->{Filename} ;
1483 $lastline = $data->{LastLine} ;
1484 $lastline_no = $data->{LastLineNo} ;
1485 @line = @{ $data->{Line} } ;
1486 @line_no = @{ $data->{LineNo} } ;
1487
1488 if ($isPipe and $? ) {
1489 -- $lastline_no ;
1490 print STDERR "Error reading from pipe '$ThisFile': $! in $filename, line $lastline_no\n" ;
1491 exit 1 ;
1492 }
1493
1494 print Q(<<"EOF");
1495#
1496#/* INCLUDE: Returning to '$filename' from '$ThisFile' */
1497#
1498EOF
1499
1500 return 1 ;
1501 }
1502
1503sub ValidProtoString ($)
1504 {
1505 my($string) = @_ ;
1506
1507 if ( $string =~ /^$proto_re+$/ ) {
1508 return $string ;
1509 }
1510
1511 return 0 ;
1512 }
1513
1514sub C_string ($)
1515 {
1516 my($string) = @_ ;
1517
1518 $string =~ s[\\][\\\\]g ;
1519 $string ;
1520 }
1521
1522sub ProtoString ($)
1523 {
1524 my ($type) = @_ ;
1525
1526 $proto_letter{$type} or "\$" ;
1527 }
1528
1529sub check_cpp {
1530 my @cpp = grep(/^\#\s*(?:if|e\w+)/, @line);
1531 if (@cpp) {
1532 my ($cpp, $cpplevel);
1533 for $cpp (@cpp) {
1534 if ($cpp =~ /^\#\s*if/) {
1535 $cpplevel++;
1536 } elsif (!$cpplevel) {
1537 Warn("Warning: #else/elif/endif without #if in this function");
1538 print STDERR " (precede it with a blank line if the matching #if is outside the function)\n"
1539 if $XSStack[-1]{type} eq 'if';
1540 return;
1541 } elsif ($cpp =~ /^\#\s*endif/) {
1542 $cpplevel--;
1543 }
1544 }
1545 Warn("Warning: #if without #endif in this function") if $cpplevel;
1546 }
1547}
1548
1549
1550sub Q {
1551 my($text) = @_;
1552 $text =~ s/^#//gm;
1553 $text =~ s/\[\[/{/g;
1554 $text =~ s/\]\]/}/g;
1555 $text;
1556}
1557
1558# Read next xsub into @line from ($lastline, <$FH>).
1559sub fetch_para {
1560 # parse paragraph
1561 death ("Error: Unterminated `#if/#ifdef/#ifndef'")
1562 if !defined $lastline && $XSStack[-1]{type} eq 'if';
1563 @line = ();
1564 @line_no = () ;
1565 return PopFile() if !defined $lastline;
1566
1567 if ($lastline =~
1568 /^MODULE\s*=\s*([\w:]+)(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/) {
1569 $Module = $1;
1570 $Package = defined($2) ? $2 : ''; # keep -w happy
1571 $Prefix = defined($3) ? $3 : ''; # keep -w happy
1572 $Prefix = quotemeta $Prefix ;
1573 ($Module_cname = $Module) =~ s/\W/_/g;
1574 ($Packid = $Package) =~ tr/:/_/;
1575 $Packprefix = $Package;
1576 $Packprefix .= "::" if $Packprefix ne "";
1577 $lastline = "";
1578 }
1579
1580 for (;;) {
1581 # Skip embedded PODs
1582 while ($lastline =~ /^=/) {
1583 while ($lastline = <$FH>) {
1584 last if ($lastline =~ /^=cut\s*$/);
1585 }
1586 death ("Error: Unterminated pod") unless $lastline;
1587 $lastline = <$FH>;
1588 chomp $lastline;
1589 $lastline =~ s/^\s+$//;
1590 }
1591 if ($lastline !~ /^\s*#/ ||
1592 # CPP directives:
1593 # ANSI: if ifdef ifndef elif else endif define undef
1594 # line error pragma
1595 # gcc: warning include_next
1596 # obj-c: import
1597 # others: ident (gcc notes that some cpps have this one)
1598 $lastline =~ /^#[ \t]*(?:(?:if|ifn?def|elif|else|endif|define|undef|pragma|error|warning|line\s+\d+|ident)\b|(?:include(?:_next)?|import)\s*["<].*[>"])/) {
1599 last if $lastline =~ /^\S/ && @line && $line[-1] eq "";
1600 push(@line, $lastline);
1601 push(@line_no, $lastline_no) ;
1602 }
1603
1604 # Read next line and continuation lines
1605 last unless defined($lastline = <$FH>);
1606 $lastline_no = $.;
1607 my $tmp_line;
1608 $lastline .= $tmp_line
1609 while ($lastline =~ /\\$/ && defined($tmp_line = <$FH>));
1610
1611 chomp $lastline;
1612 $lastline =~ s/^\s+$//;
1613 }
1614 pop(@line), pop(@line_no) while @line && $line[-1] eq "";
1615 1;
1616}
1617
1618sub output_init {
1619 local($type, $num, $var, $init, $name_printed) = @_;
1620 local($arg) = "ST(" . ($num - 1) . ")";
1621
1622 if ( $init =~ /^=/ ) {
1623 if ($name_printed) {
1624 eval qq/print " $init\\n"/;
1625 } else {
1626 eval qq/print "\\t$var $init\\n"/;
1627 }
1628 warn $@ if $@;
1629 } else {
1630 if ( $init =~ s/^\+// && $num ) {
1631 &generate_init($type, $num, $var, $name_printed);
1632 } elsif ($name_printed) {
1633 print ";\n";
1634 $init =~ s/^;//;
1635 } else {
1636 eval qq/print "\\t$var;\\n"/;
1637 warn $@ if $@;
1638 $init =~ s/^;//;
1639 }
1640 $deferred .= eval qq/"\\n\\t$init\\n"/;
1641 warn $@ if $@;
1642 }
1643}
1644
1645sub Warn
1646 {
1647 # work out the line number
1648 my $line_no = $line_no[@line_no - @line -1] ;
1649
1650 print STDERR "@_ in $filename, line $line_no\n" ;
1651 }
1652
1653sub blurt
1654 {
1655 Warn @_ ;
1656 $errors ++
1657 }
1658
1659sub death
1660 {
1661 Warn @_ ;
1662 exit 1 ;
1663 }
1664
1665sub generate_init {
1666 local($type, $num, $var) = @_;
1667 local($arg) = "ST(" . ($num - 1) . ")";
1668 local($argoff) = $num - 1;
1669 local($ntype);
1670 local($tk);
1671
1672 $type = TidyType($type) ;
1673 blurt("Error: '$type' not in typemap"), return
1674 unless defined($type_kind{$type});
1675
1676 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1677 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1678 $tk = $type_kind{$type};
1679 $tk =~ s/OBJ$/REF/ if $func_name =~ /DESTROY$/;
1680 if ($tk eq 'T_PV' and exists $lengthof{$var}) {
1681 print "\t$var" unless $name_printed;
1682 print " = ($type)SvPV($arg, STRLEN_length_of_$var);\n";
1683 die "default value not supported with length(NAME) supplied"
1684 if defined $defaults{$var};
1685 return;
1686 }
1687 $type =~ tr/:/_/ unless $hiertype;
1688 blurt("Error: No INPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1689 unless defined $input_expr{$tk} ;
1690 $expr = $input_expr{$tk};
1691 if ($expr =~ /DO_ARRAY_ELEM/) {
1692 blurt("Error: '$subtype' not in typemap"), return
1693 unless defined($type_kind{$subtype});
1694 blurt("Error: No INPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1695 unless defined $input_expr{$type_kind{$subtype}} ;
1696 $subexpr = $input_expr{$type_kind{$subtype}};
1697 $subexpr =~ s/\$type/\$subtype/g;
1698 $subexpr =~ s/ntype/subtype/g;
1699 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1700 $subexpr =~ s/\n\t/\n\t\t/g;
1701 $subexpr =~ s/is not of (.*\")/[arg %d] is not of $1, ix_$var + 1/g;
1702 $subexpr =~ s/\$var/${var}[ix_$var - $argoff]/;
1703 $expr =~ s/DO_ARRAY_ELEM/$subexpr/;
1704 }
1705 if ($expr =~ m#/\*.*scope.*\*/#i) { # "scope" in C comments
1706 $ScopeThisXSUB = 1;
1707 }
1708 if (defined($defaults{$var})) {
1709 $expr =~ s/(\t+)/$1 /g;
1710 $expr =~ s/ /\t/g;
1711 if ($name_printed) {
1712 print ";\n";
1713 } else {
1714 eval qq/print "\\t$var;\\n"/;
1715 warn $@ if $@;
1716 }
1717 if ($defaults{$var} eq 'NO_INIT') {
1718 $deferred .= eval qq/"\\n\\tif (items >= $num) {\\n$expr;\\n\\t}\\n"/;
1719 } else {
1720 $deferred .= eval qq/"\\n\\tif (items < $num)\\n\\t $var = $defaults{$var};\\n\\telse {\\n$expr;\\n\\t}\\n"/;
1721 }
1722 warn $@ if $@;
1723 } elsif ($ScopeThisXSUB or $expr !~ /^\s*\$var =/) {
1724 if ($name_printed) {
1725 print ";\n";
1726 } else {
1727 eval qq/print "\\t$var;\\n"/;
1728 warn $@ if $@;
1729 }
1730 $deferred .= eval qq/"\\n$expr;\\n"/;
1731 warn $@ if $@;
1732 } else {
1733 die "panic: do not know how to handle this branch for function pointers"
1734 if $name_printed;
1735 eval qq/print "$expr;\\n"/;
1736 warn $@ if $@;
1737 }
1738}
1739
1740sub generate_output {
1741 local($type, $num, $var, $do_setmagic, $do_push) = @_;
1742 local($arg) = "ST(" . ($num - ($num != 0)) . ")";
1743 local($argoff) = $num - 1;
1744 local($ntype);
1745
1746 $type = TidyType($type) ;
1747 if ($type =~ /^array\(([^,]*),(.*)\)/) {
1748 print "\t$arg = sv_newmortal();\n";
1749 print "\tsv_setpvn($arg, (char *)$var, $2 * sizeof($1));\n";
1750 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1751 } else {
1752 blurt("Error: '$type' not in typemap"), return
1753 unless defined($type_kind{$type});
1754 blurt("Error: No OUTPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1755 unless defined $output_expr{$type_kind{$type}} ;
1756 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1757 $ntype =~ s/\(\)//g;
1758 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1759 $expr = $output_expr{$type_kind{$type}};
1760 if ($expr =~ /DO_ARRAY_ELEM/) {
1761 blurt("Error: '$subtype' not in typemap"), return
1762 unless defined($type_kind{$subtype});
1763 blurt("Error: No OUTPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1764 unless defined $output_expr{$type_kind{$subtype}} ;
1765 $subexpr = $output_expr{$type_kind{$subtype}};
1766 $subexpr =~ s/ntype/subtype/g;
1767 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1768 $subexpr =~ s/\$var/${var}[ix_$var]/g;
1769 $subexpr =~ s/\n\t/\n\t\t/g;
1770 $expr =~ s/DO_ARRAY_ELEM\n/$subexpr/;
1771 eval "print qq\a$expr\a";
1772 warn $@ if $@;
1773 print "\t\tSvSETMAGIC(ST(ix_$var));\n" if $do_setmagic;
1774 } elsif ($var eq 'RETVAL') {
1775 if ($expr =~ /^\t\$arg = new/) {
1776 # We expect that $arg has refcnt 1, so we need to
1777 # mortalize it.
1778 eval "print qq\a$expr\a";
1779 warn $@ if $@;
1780 print "\tsv_2mortal(ST($num));\n";
1781 print "\tSvSETMAGIC(ST($num));\n" if $do_setmagic;
1782 } elsif ($expr =~ /^\s*\$arg\s*=/) {
1783 # We expect that $arg has refcnt >=1, so we need
1784 # to mortalize it!
1785 eval "print qq\a$expr\a";
1786 warn $@ if $@;
1787 print "\tsv_2mortal(ST(0));\n";
1788 print "\tSvSETMAGIC(ST(0));\n" if $do_setmagic;
1789 } else {
1790 # Just hope that the entry would safely write it
1791 # over an already mortalized value. By
1792 # coincidence, something like $arg = &sv_undef
1793 # works too.
1794 print "\tST(0) = sv_newmortal();\n";
1795 eval "print qq\a$expr\a";
1796 warn $@ if $@;
1797 # new mortals don't have set magic
1798 }
1799 } elsif ($do_push) {
1800 print "\tPUSHs(sv_newmortal());\n";
1801 $arg = "ST($num)";
1802 eval "print qq\a$expr\a";
1803 warn $@ if $@;
1804 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1805 } elsif ($arg =~ /^ST\(\d+\)$/) {
1806 eval "print qq\a$expr\a";
1807 warn $@ if $@;
1808 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1809 }
1810 }
1811}
1812
1813sub map_type {
1814 my($type, $varname) = @_;
1815
1816 # C++ has :: in types too so skip this
1817 $type =~ tr/:/_/ unless $hiertype;
1818 $type =~ s/^array\(([^,]*),(.*)\).*/$1 */s;
1819 if ($varname) {
1820 if ($varname && $type =~ / \( \s* \* (?= \s* \) ) /xg) {
1821 (substr $type, pos $type, 0) = " $varname ";
1822 } else {
1823 $type .= "\t$varname";
1824 }
1825 }
1826 $type;
1827}
1828
1829
1830#########################################################
1831package
1832 ExtUtils::ParseXS::CountLines;
1833use strict;
1834use vars qw($SECTION_END_MARKER);
1835
1836sub TIEHANDLE {
1837 my ($class, $cfile, $fh) = @_;
1838 $cfile =~ s/\\/\\\\/g;
1839 $SECTION_END_MARKER = qq{#line --- "$cfile"};
1840
1841 return bless {buffer => '',
1842 fh => $fh,
1843 line_no => 1,
1844 }, $class;
1845}
1846
1847sub PRINT {
1848 my $self = shift;
1849 for (@_) {
1850 $self->{buffer} .= $_;
1851 while ($self->{buffer} =~ s/^([^\n]*\n)//) {
1852 my $line = $1;
1853 ++ $self->{line_no};
1854 $line =~ s|^\#line\s+---(?=\s)|#line $self->{line_no}|;
1855 print {$self->{fh}} $line;
1856 }
1857 }
1858}
1859
1860sub PRINTF {
1861 my $self = shift;
1862 my $fmt = shift;
1863 $self->PRINT(sprintf($fmt, @_));
1864}
1865
1866sub DESTROY {
1867 # Not necessary if we're careful to end with a "\n"
1868 my $self = shift;
1869 print {$self->{fh}} $self->{buffer};
1870}
1871
1872sub UNTIE {
3c4b39be 1873 # This sub does nothing, but is necessary for references to be released.
6b09c160 1874}
1875
1876sub end_marker {
1877 return $SECTION_END_MARKER;
1878}
1879
1880
18811;
1882__END__
1883
1884=head1 NAME
1885
1886ExtUtils::ParseXS - converts Perl XS code into C code
1887
1888=head1 SYNOPSIS
1889
1890 use ExtUtils::ParseXS qw(process_file);
1891
1892 process_file( filename => 'foo.xs' );
1893
1894 process_file( filename => 'foo.xs',
1895 output => 'bar.c',
1896 'C++' => 1,
1897 typemap => 'path/to/typemap',
1898 hiertype => 1,
1899 except => 1,
1900 prototypes => 1,
1901 versioncheck => 1,
1902 linenumbers => 1,
1903 optimize => 1,
1904 prototypes => 1,
1905 );
1906=head1 DESCRIPTION
1907
1908C<ExtUtils::ParseXS> will compile XS code into C code by embedding the constructs
1909necessary to let C functions manipulate Perl values and creates the glue
1910necessary to let Perl access those functions. The compiler uses typemaps to
1911determine how to map C function parameters and variables to Perl values.
1912
1913The compiler will search for typemap files called I<typemap>. It will use
1914the following search path to find default typemaps, with the rightmost
1915typemap taking precedence.
1916
1917 ../../../typemap:../../typemap:../typemap:typemap
1918
1919=head1 EXPORT
1920
1921None by default. C<process_file()> may be exported upon request.
1922
1923
1924=head1 FUNCTIONS
1925
1926=over 4
1927
1928=item process_xs()
1929
1930This function processes an XS file and sends output to a C file.
1931Named parameters control how the processing is done. The following
1932parameters are accepted:
1933
1934=over 4
1935
1936=item B<C++>
1937
1938Adds C<extern "C"> to the C code. Default is false.
1939
1940=item B<hiertype>
1941
3c4b39be 1942Retains C<::> in type names so that C++ hierarchical types can be
6b09c160 1943mapped. Default is false.
1944
1945=item B<except>
1946
1947Adds exception handling stubs to the C code. Default is false.
1948
1949=item B<typemap>
1950
1951Indicates that a user-supplied typemap should take precedence over the
1952default typemaps. A single typemap may be specified as a string, or
1953multiple typemaps can be specified in an array reference, with the
1954last typemap having the highest precedence.
1955
1956=item B<prototypes>
1957
1958Generates prototype code for all xsubs. Default is false.
1959
1960=item B<versioncheck>
1961
1962Makes sure at run time that the object file (derived from the C<.xs>
1963file) and the C<.pm> files have the same version number. Default is
1964true.
1965
1966=item B<linenumbers>
1967
1968Adds C<#line> directives to the C output so error messages will look
1969like they came from the original XS file. Default is true.
1970
1971=item B<optimize>
1972
1973Enables certain optimizations. The only optimization that is currently
1974affected is the use of I<target>s by the output C code (see L<perlguts>).
1975Not optimizing may significantly slow down the generated code, but this is the way
1976B<xsubpp> of 5.005 and earlier operated. Default is to optimize.
1977
1978=item B<inout>
1979
1980Enable recognition of C<IN>, C<OUT_LIST> and C<INOUT_LIST>
1981declarations. Default is true.
1982
1983=item B<argtypes>
1984
1985Enable recognition of ANSI-like descriptions of function signature.
1986Default is true.
1987
1988=item B<s>
1989
1990I have no clue what this does. Strips function prefixes?
1991
1992=back
1993
1994=item errors()
1995
1996This function returns the number of [a certain kind of] errors
1997encountered during processing of the XS file.
1998
1999=back
2000
2001=head1 AUTHOR
2002
2003Based on xsubpp code, written by Larry Wall.
2004
2005Maintained by Ken Williams, <ken@mathforum.org>
2006
2007=head1 COPYRIGHT
2008
2009Copyright 2002-2003 Ken Williams. All rights reserved.
2010
2011This library is free software; you can redistribute it and/or
2012modify it under the same terms as Perl itself.
2013
2014Based on the ExtUtils::xsubpp code by Larry Wall and the Perl 5
2015Porters, which was released under the same license terms.
2016
2017=head1 SEE ALSO
2018
2019L<perl>, ExtUtils::xsubpp, ExtUtils::MakeMaker, L<perlxs>, L<perlxstut>.
2020
2021=cut
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