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Quotes fixed, see also perl #36079
[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);
008fb49c 20$VERSION = '2.09_02';
6b09c160 21$VERSION = eval $VERSION;
22
23use vars qw(%input_expr %output_expr $ProtoUsed @InitFileCode $FH $proto_re $Overload $errors $Fallback
24 $cplusplus $hiertype $WantPrototypes $WantVersionChk $except $WantLineNumbers
25 $WantOptimize $process_inout $process_argtypes @tm
26 $dir $filename $filepathname %IncludedFiles
27 %type_kind %proto_letter
28 %targetable $BLOCK_re $lastline $lastline_no
29 $Package $Prefix @line @BootCode %args_match %defaults %var_types %arg_list @proto_arg
30 $processing_arg_with_types %argtype_seen @outlist %in_out %lengthof
31 $proto_in_this_xsub $scope_in_this_xsub $interface $prepush_done $interface_macro $interface_macro_set
32 $ProtoThisXSUB $ScopeThisXSUB $xsreturn
33 @line_no $ret_type $func_header $orig_args
34 ); # Add these just to get compilation to happen.
35
36
37sub process_file {
38
39 # Allow for $package->process_file(%hash) in the future
40 my ($pkg, %args) = @_ % 2 ? @_ : (__PACKAGE__, @_);
41
42 $ProtoUsed = exists $args{prototypes};
43
44 # Set defaults.
45 %args = (
46 # 'C++' => 0, # Doesn't seem to *do* anything...
47 hiertype => 0,
48 except => 0,
49 prototypes => 0,
50 versioncheck => 1,
51 linenumbers => 1,
52 optimize => 1,
53 prototypes => 0,
54 inout => 1,
55 argtypes => 1,
56 typemap => [],
57 output => \*STDOUT,
008fb49c 58 csuffix => '.c',
6b09c160 59 %args,
60 );
61
62 # Global Constants
63
64 my ($Is_VMS, $SymSet);
65 if ($^O eq 'VMS') {
66 $Is_VMS = 1;
67 # Establish set of global symbols with max length 28, since xsubpp
68 # will later add the 'XS_' prefix.
69 require ExtUtils::XSSymSet;
70 $SymSet = new ExtUtils::XSSymSet 28;
71 }
72 @XSStack = ({type => 'none'});
73 ($XSS_work_idx, $cpp_next_tmp) = (0, "XSubPPtmpAAAA");
74 @InitFileCode = ();
75 $FH = 'File0000' ;
76 $proto_re = "[" . quotemeta('\$%&*@;[]') . "]" ;
77 $Overload = 0;
78 $errors = 0;
79 $Fallback = 'PL_sv_undef';
80
81 # Most of the 1500 lines below uses these globals. We'll have to
82 # clean this up sometime, probably. For now, we just pull them out
83 # of %args. -Ken
84
85 $cplusplus = $args{'C++'};
86 $hiertype = $args{hiertype};
87 $WantPrototypes = $args{prototypes};
88 $WantVersionChk = $args{versioncheck};
89 $except = $args{except} ? ' TRY' : '';
90 $WantLineNumbers = $args{linenumbers};
91 $WantOptimize = $args{optimize};
92 $process_inout = $args{inout};
93 $process_argtypes = $args{argtypes};
94 @tm = ref $args{typemap} ? @{$args{typemap}} : ($args{typemap});
95
96 for ($args{filename}) {
97 die "Missing required parameter 'filename'" unless $_;
98 $filepathname = $_;
99 ($dir, $filename) = (dirname($_), basename($_));
100 $filepathname =~ s/\\/\\\\/g;
101 $IncludedFiles{$_}++;
102 }
103
104 # Open the input file
105 open($FH, $args{filename}) or die "cannot open $args{filename}: $!\n";
106
107 # Open the output file if given as a string. If they provide some
108 # other kind of reference, trust them that we can print to it.
109 if (not ref $args{output}) {
110 open my($fh), "> $args{output}" or die "Can't create $args{output}: $!";
111 $args{outfile} = $args{output};
112 $args{output} = $fh;
113 }
114
115 # Really, we shouldn't have to chdir() or select() in the first
116 # place. For now, just save & restore.
117 my $orig_cwd = cwd();
118 my $orig_fh = select();
119
120 chdir($dir);
121 my $pwd = cwd();
008fb49c 122 my $csuffix = $args{csuffix};
6b09c160 123
124 if ($WantLineNumbers) {
125 my $cfile;
126 if ( $args{outfile} ) {
127 $cfile = $args{outfile};
128 } else {
129 $cfile = $args{filename};
008fb49c 130 $cfile =~ s/\.xs$/$csuffix/i or $cfile .= $csuffix;
6b09c160 131 }
132 tie(*PSEUDO_STDOUT, 'ExtUtils::ParseXS::CountLines', $cfile, $args{output});
133 select PSEUDO_STDOUT;
134 } else {
135 select $args{output};
136 }
137
138 foreach my $typemap (@tm) {
139 die "Can't find $typemap in $pwd\n" unless -r $typemap;
140 }
141
142 push @tm, standard_typemap_locations();
143
144 foreach my $typemap (@tm) {
145 next unless -f $typemap ;
146 # skip directories, binary files etc.
147 warn("Warning: ignoring non-text typemap file '$typemap'\n"), next
148 unless -T $typemap ;
149 open(TYPEMAP, $typemap)
150 or warn ("Warning: could not open typemap file '$typemap': $!\n"), next;
151 my $mode = 'Typemap';
152 my $junk = "" ;
153 my $current = \$junk;
154 while (<TYPEMAP>) {
155 next if /^\s* #/;
156 my $line_no = $. + 1;
157 if (/^INPUT\s*$/) {
158 $mode = 'Input'; $current = \$junk; next;
159 }
160 if (/^OUTPUT\s*$/) {
161 $mode = 'Output'; $current = \$junk; next;
162 }
163 if (/^TYPEMAP\s*$/) {
164 $mode = 'Typemap'; $current = \$junk; next;
165 }
166 if ($mode eq 'Typemap') {
167 chomp;
168 my $line = $_ ;
169 TrimWhitespace($_) ;
170 # skip blank lines and comment lines
171 next if /^$/ or /^#/ ;
172 my($type,$kind, $proto) = /^\s*(.*?\S)\s+(\S+)\s*($proto_re*)\s*$/ or
173 warn("Warning: File '$typemap' Line $. '$line' TYPEMAP entry needs 2 or 3 columns\n"), next;
174 $type = TidyType($type) ;
175 $type_kind{$type} = $kind ;
176 # prototype defaults to '$'
177 $proto = "\$" unless $proto ;
178 warn("Warning: File '$typemap' Line $. '$line' Invalid prototype '$proto'\n")
179 unless ValidProtoString($proto) ;
180 $proto_letter{$type} = C_string($proto) ;
181 } elsif (/^\s/) {
182 $$current .= $_;
183 } elsif ($mode eq 'Input') {
184 s/\s+$//;
185 $input_expr{$_} = '';
186 $current = \$input_expr{$_};
187 } else {
188 s/\s+$//;
189 $output_expr{$_} = '';
190 $current = \$output_expr{$_};
191 }
192 }
193 close(TYPEMAP);
194 }
195
196 foreach my $key (keys %input_expr) {
197 $input_expr{$key} =~ s/;*\s+\z//;
198 }
199
200 my ($bal, $cast, $size);
201 $bal = qr[(?:(?>[^()]+)|\((??{ $bal })\))*]; # ()-balanced
202 $cast = qr[(?:\(\s*SV\s*\*\s*\)\s*)?]; # Optional (SV*) cast
203 $size = qr[,\s* (??{ $bal }) ]x; # Third arg (to setpvn)
204
205 foreach my $key (keys %output_expr) {
206 use re 'eval';
207
208 my ($t, $with_size, $arg, $sarg) =
209 ($output_expr{$key} =~
210 m[^ \s+ sv_set ( [iunp] ) v (n)? # Type, is_setpvn
211 \s* \( \s* $cast \$arg \s* ,
212 \s* ( (??{ $bal }) ) # Set from
213 ( (??{ $size }) )? # Possible sizeof set-from
214 \) \s* ; \s* $
215 ]x);
216 $targetable{$key} = [$t, $with_size, $arg, $sarg] if $t;
217 }
218
219 my $END = "!End!\n\n"; # "impossible" keyword (multiple newline)
220
221 # Match an XS keyword
222 $BLOCK_re= '\s*(' . join('|', qw(
223 REQUIRE BOOT CASE PREINIT INPUT INIT CODE PPCODE OUTPUT
224 CLEANUP ALIAS ATTRS PROTOTYPES PROTOTYPE VERSIONCHECK INCLUDE
225 SCOPE INTERFACE INTERFACE_MACRO C_ARGS POSTCALL OVERLOAD FALLBACK
226 )) . "|$END)\\s*:";
227
228
229 my ($C_group_rex, $C_arg);
230 # Group in C (no support for comments or literals)
231 $C_group_rex = qr/ [({\[]
232 (?: (?> [^()\[\]{}]+ ) | (??{ $C_group_rex }) )*
233 [)}\]] /x ;
234 # Chunk in C without comma at toplevel (no comments):
235 $C_arg = qr/ (?: (?> [^()\[\]{},"']+ )
236 | (??{ $C_group_rex })
237 | " (?: (?> [^\\"]+ )
238 | \\.
239 )* " # String literal
240 | ' (?: (?> [^\\']+ ) | \\. )* ' # Char literal
241 )* /xs;
242
243 # Identify the version of xsubpp used
244 print <<EOM ;
245/*
246 * This file was generated automatically by ExtUtils::ParseXS version $VERSION from the
247 * contents of $filename. Do not edit this file, edit $filename instead.
248 *
249 * ANY CHANGES MADE HERE WILL BE LOST!
250 *
251 */
252
253EOM
254
255
256 print("#line 1 \"$filepathname\"\n")
257 if $WantLineNumbers;
258
259 firstmodule:
260 while (<$FH>) {
261 if (/^=/) {
262 my $podstartline = $.;
263 do {
264 if (/^=cut\s*$/) {
265 # We can't just write out a /* */ comment, as our embedded
266 # POD might itself be in a comment. We can't put a /**/
267 # comment inside #if 0, as the C standard says that the source
268 # file is decomposed into preprocessing characters in the stage
269 # before preprocessing commands are executed.
270 # I don't want to leave the text as barewords, because the spec
271 # isn't clear whether macros are expanded before or after
272 # preprocessing commands are executed, and someone pathological
273 # may just have defined one of the 3 words as a macro that does
274 # something strange. Multiline strings are illegal in C, so
275 # the "" we write must be a string literal. And they aren't
276 # concatenated until 2 steps later, so we are safe.
277 # - Nicholas Clark
278 print("#if 0\n \"Skipped embedded POD.\"\n#endif\n");
279 printf("#line %d \"$filepathname\"\n", $. + 1)
280 if $WantLineNumbers;
281 next firstmodule
282 }
283
284 } while (<$FH>);
285 # At this point $. is at end of file so die won't state the start
286 # of the problem, and as we haven't yet read any lines &death won't
287 # show the correct line in the message either.
288 die ("Error: Unterminated pod in $filename, line $podstartline\n")
289 unless $lastline;
290 }
291 last if ($Package, $Prefix) =
292 /^MODULE\s*=\s*[\w:]+(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/;
293
294 print $_;
295 }
296 unless (defined $_) {
297 warn "Didn't find a 'MODULE ... PACKAGE ... PREFIX' line\n";
298 exit 0; # Not a fatal error for the caller process
299 }
300
301 print <<"EOF";
302#ifndef PERL_UNUSED_VAR
303# define PERL_UNUSED_VAR(var) if (0) var = var
304#endif
305
306EOF
307
308 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $WantLineNumbers;
309
310 $lastline = $_;
311 $lastline_no = $.;
312
313 PARAGRAPH:
314 while (fetch_para()) {
315 # Print initial preprocessor statements and blank lines
316 while (@line && $line[0] !~ /^[^\#]/) {
317 my $line = shift(@line);
318 print $line, "\n";
319 next unless $line =~ /^\#\s*((if)(?:n?def)?|elsif|else|endif)\b/;
320 my $statement = $+;
321 if ($statement eq 'if') {
322 $XSS_work_idx = @XSStack;
323 push(@XSStack, {type => 'if'});
324 } else {
325 death ("Error: `$statement' with no matching `if'")
326 if $XSStack[-1]{type} ne 'if';
327 if ($XSStack[-1]{varname}) {
328 push(@InitFileCode, "#endif\n");
329 push(@BootCode, "#endif");
330 }
331
332 my(@fns) = keys %{$XSStack[-1]{functions}};
333 if ($statement ne 'endif') {
334 # Hide the functions defined in other #if branches, and reset.
335 @{$XSStack[-1]{other_functions}}{@fns} = (1) x @fns;
336 @{$XSStack[-1]}{qw(varname functions)} = ('', {});
337 } else {
338 my($tmp) = pop(@XSStack);
339 0 while (--$XSS_work_idx
340 && $XSStack[$XSS_work_idx]{type} ne 'if');
341 # Keep all new defined functions
342 push(@fns, keys %{$tmp->{other_functions}});
343 @{$XSStack[$XSS_work_idx]{functions}}{@fns} = (1) x @fns;
344 }
345 }
346 }
347
348 next PARAGRAPH unless @line;
349
350 if ($XSS_work_idx && !$XSStack[$XSS_work_idx]{varname}) {
351 # We are inside an #if, but have not yet #defined its xsubpp variable.
352 print "#define $cpp_next_tmp 1\n\n";
353 push(@InitFileCode, "#if $cpp_next_tmp\n");
354 push(@BootCode, "#if $cpp_next_tmp");
355 $XSStack[$XSS_work_idx]{varname} = $cpp_next_tmp++;
356 }
357
358 death ("Code is not inside a function"
359 ." (maybe last function was ended by a blank line "
360 ." followed by a statement on column one?)")
361 if $line[0] =~ /^\s/;
362
008fb49c 363 my ($class, $externC, $static, $elipsis, $wantRETVAL, $RETVAL_no_return);
6b09c160 364 my (@fake_INPUT_pre); # For length(s) generated variables
365 my (@fake_INPUT);
366
367 # initialize info arrays
368 undef(%args_match);
369 undef(%var_types);
370 undef(%defaults);
371 undef(%arg_list) ;
372 undef(@proto_arg) ;
373 undef($processing_arg_with_types) ;
374 undef(%argtype_seen) ;
375 undef(@outlist) ;
376 undef(%in_out) ;
377 undef(%lengthof) ;
378 undef($proto_in_this_xsub) ;
379 undef($scope_in_this_xsub) ;
380 undef($interface);
381 undef($prepush_done);
382 $interface_macro = 'XSINTERFACE_FUNC' ;
383 $interface_macro_set = 'XSINTERFACE_FUNC_SET' ;
384 $ProtoThisXSUB = $WantPrototypes ;
385 $ScopeThisXSUB = 0;
386 $xsreturn = 0;
387
388 $_ = shift(@line);
389 while (my $kwd = check_keyword("REQUIRE|PROTOTYPES|FALLBACK|VERSIONCHECK|INCLUDE")) {
390 &{"${kwd}_handler"}() ;
391 next PARAGRAPH unless @line ;
392 $_ = shift(@line);
393 }
394
395 if (check_keyword("BOOT")) {
396 &check_cpp;
397 push (@BootCode, "#line $line_no[@line_no - @line] \"$filepathname\"")
398 if $WantLineNumbers && $line[0] !~ /^\s*#\s*line\b/;
399 push (@BootCode, @line, "") ;
400 next PARAGRAPH ;
401 }
402
403
404 # extract return type, function name and arguments
405 ($ret_type) = TidyType($_);
406 $RETVAL_no_return = 1 if $ret_type =~ s/^NO_OUTPUT\s+//;
407
408 # Allow one-line ANSI-like declaration
409 unshift @line, $2
410 if $process_argtypes
411 and $ret_type =~ s/^(.*?\w.*?)\s*\b(\w+\s*\(.*)/$1/s;
412
413 # a function definition needs at least 2 lines
414 blurt ("Error: Function definition too short '$ret_type'"), next PARAGRAPH
415 unless @line ;
416
008fb49c 417 $externC = 1 if $ret_type =~ s/^extern "C"\s+//;
418 $static = 1 if $ret_type =~ s/^static\s+//;
6b09c160 419
420 $func_header = shift(@line);
421 blurt ("Error: Cannot parse function definition from '$func_header'"), next PARAGRAPH
422 unless $func_header =~ /^(?:([\w:]*)::)?(\w+)\s*\(\s*(.*?)\s*\)\s*(const)?\s*(;\s*)?$/s;
423
424 ($class, $func_name, $orig_args) = ($1, $2, $3) ;
425 $class = "$4 $class" if $4;
426 ($pname = $func_name) =~ s/^($Prefix)?/$Packprefix/;
427 ($clean_func_name = $func_name) =~ s/^$Prefix//;
428 $Full_func_name = "${Packid}_$clean_func_name";
429 if ($Is_VMS) {
430 $Full_func_name = $SymSet->addsym($Full_func_name);
431 }
432
433 # Check for duplicate function definition
434 for my $tmp (@XSStack) {
435 next unless defined $tmp->{functions}{$Full_func_name};
436 Warn("Warning: duplicate function definition '$clean_func_name' detected");
437 last;
438 }
439 $XSStack[$XSS_work_idx]{functions}{$Full_func_name} ++ ;
440 %XsubAliases = %XsubAliasValues = %Interfaces = @Attributes = ();
441 $DoSetMagic = 1;
442
443 $orig_args =~ s/\\\s*/ /g; # process line continuations
444 my @args;
445
446 my %only_C_inlist; # Not in the signature of Perl function
447 if ($process_argtypes and $orig_args =~ /\S/) {
448 my $args = "$orig_args ,";
449 if ($args =~ /^( (??{ $C_arg }) , )* $ /x) {
450 @args = ($args =~ /\G ( (??{ $C_arg }) ) , /xg);
451 for ( @args ) {
452 s/^\s+//;
453 s/\s+$//;
454 my ($arg, $default) = / ( [^=]* ) ( (?: = .* )? ) /x;
455 my ($pre, $name) = ($arg =~ /(.*?) \s*
456 \b ( \w+ | length\( \s*\w+\s* \) )
457 \s* $ /x);
458 next unless defined($pre) && length($pre);
459 my $out_type;
460 my $inout_var;
461 if ($process_inout and s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//) {
462 my $type = $1;
463 $out_type = $type if $type ne 'IN';
464 $arg =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//;
465 $pre =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//;
466 }
467 my $islength;
468 if ($name =~ /^length\( \s* (\w+) \s* \)\z/x) {
469 $name = "XSauto_length_of_$1";
470 $islength = 1;
471 die "Default value on length() argument: `$_'"
472 if length $default;
473 }
474 if (length $pre or $islength) { # Has a type
475 if ($islength) {
476 push @fake_INPUT_pre, $arg;
477 } else {
478 push @fake_INPUT, $arg;
479 }
480 # warn "pushing '$arg'\n";
481 $argtype_seen{$name}++;
482 $_ = "$name$default"; # Assigns to @args
483 }
484 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST" or $islength;
485 push @outlist, $name if $out_type =~ /OUTLIST$/;
486 $in_out{$name} = $out_type if $out_type;
487 }
488 } else {
489 @args = split(/\s*,\s*/, $orig_args);
490 Warn("Warning: cannot parse argument list '$orig_args', fallback to split");
491 }
492 } else {
493 @args = split(/\s*,\s*/, $orig_args);
494 for (@args) {
495 if ($process_inout and s/^(IN|IN_OUTLIST|OUTLIST|IN_OUT|OUT)\s+//) {
496 my $out_type = $1;
497 next if $out_type eq 'IN';
498 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST";
499 push @outlist, $name if $out_type =~ /OUTLIST$/;
500 $in_out{$_} = $out_type;
501 }
502 }
503 }
504 if (defined($class)) {
505 my $arg0 = ((defined($static) or $func_name eq 'new')
506 ? "CLASS" : "THIS");
507 unshift(@args, $arg0);
508 ($report_args = "$arg0, $report_args") =~ s/^\w+, $/$arg0/;
509 }
510 my $extra_args = 0;
511 @args_num = ();
512 $num_args = 0;
513 my $report_args = '';
514 foreach my $i (0 .. $#args) {
515 if ($args[$i] =~ s/\.\.\.//) {
516 $elipsis = 1;
517 if ($args[$i] eq '' && $i == $#args) {
518 $report_args .= ", ...";
519 pop(@args);
520 last;
521 }
522 }
523 if ($only_C_inlist{$args[$i]}) {
524 push @args_num, undef;
525 } else {
526 push @args_num, ++$num_args;
527 $report_args .= ", $args[$i]";
528 }
529 if ($args[$i] =~ /^([^=]*[^\s=])\s*=\s*(.*)/s) {
530 $extra_args++;
531 $args[$i] = $1;
532 $defaults{$args[$i]} = $2;
533 $defaults{$args[$i]} =~ s/"/\\"/g;
534 }
535 $proto_arg[$i+1] = '$' ;
536 }
537 $min_args = $num_args - $extra_args;
538 $report_args =~ s/"/\\"/g;
539 $report_args =~ s/^,\s+//;
540 my @func_args = @args;
541 shift @func_args if defined($class);
542
543 for (@func_args) {
544 s/^/&/ if $in_out{$_};
545 }
546 $func_args = join(", ", @func_args);
547 @args_match{@args} = @args_num;
548
549 $PPCODE = grep(/^\s*PPCODE\s*:/, @line);
550 $CODE = grep(/^\s*CODE\s*:/, @line);
551 # Detect CODE: blocks which use ST(n)= or XST_m*(n,v)
552 # to set explicit return values.
553 $EXPLICIT_RETURN = ($CODE &&
554 ("@line" =~ /(\bST\s*\([^;]*=) | (\bXST_m\w+\s*\()/x ));
555 $ALIAS = grep(/^\s*ALIAS\s*:/, @line);
556 $INTERFACE = grep(/^\s*INTERFACE\s*:/, @line);
557
558 $xsreturn = 1 if $EXPLICIT_RETURN;
559
008fb49c 560 $externC = $externC ? qq[extern "C"] : "";
561
6b09c160 562 # print function header
563 print Q(<<"EOF");
008fb49c 564#$externC
6b09c160 565#XS(XS_${Full_func_name}); /* prototype to pass -Wmissing-prototypes */
566#XS(XS_${Full_func_name})
567#[[
568# dXSARGS;
569EOF
570 print Q(<<"EOF") if $ALIAS ;
571# dXSI32;
572EOF
573 print Q(<<"EOF") if $INTERFACE ;
574# dXSFUNCTION($ret_type);
575EOF
576 if ($elipsis) {
577 $cond = ($min_args ? qq(items < $min_args) : 0);
578 } elsif ($min_args == $num_args) {
579 $cond = qq(items != $min_args);
580 } else {
581 $cond = qq(items < $min_args || items > $num_args);
582 }
583
584 print Q(<<"EOF") if $except;
585# char errbuf[1024];
586# *errbuf = '\0';
587EOF
588
589 if ($ALIAS)
590 { print Q(<<"EOF") if $cond }
591# if ($cond)
592# Perl_croak(aTHX_ "Usage: %s($report_args)", GvNAME(CvGV(cv)));
593EOF
594 else
595 { print Q(<<"EOF") if $cond }
596# if ($cond)
597# Perl_croak(aTHX_ "Usage: $pname($report_args)");
598EOF
599
600 # cv doesn't seem to be used, in most cases unless we go in
601 # the if of this else
602 print Q(<<"EOF");
603# PERL_UNUSED_VAR(cv); /* -W */
604EOF
605
606 #gcc -Wall: if an xsub has PPCODE is used
607 #it is possible none of ST, XSRETURN or XSprePUSH macros are used
608 #hence `ax' (setup by dXSARGS) is unused
609 #XXX: could breakup the dXSARGS; into dSP;dMARK;dITEMS
610 #but such a move could break third-party extensions
611 print Q(<<"EOF") if $PPCODE;
612# PERL_UNUSED_VAR(ax); /* -Wall */
613EOF
614
615 print Q(<<"EOF") if $PPCODE;
616# SP -= items;
617EOF
618
619 # Now do a block of some sort.
620
621 $condnum = 0;
622 $cond = ''; # last CASE: condidional
623 push(@line, "$END:");
624 push(@line_no, $line_no[-1]);
625 $_ = '';
626 &check_cpp;
627 while (@line) {
628 &CASE_handler if check_keyword("CASE");
629 print Q(<<"EOF");
630# $except [[
631EOF
632
633 # do initialization of input variables
634 $thisdone = 0;
635 $retvaldone = 0;
636 $deferred = "";
637 %arg_list = () ;
638 $gotRETVAL = 0;
639
640 INPUT_handler() ;
641 process_keyword("INPUT|PREINIT|INTERFACE_MACRO|C_ARGS|ALIAS|ATTRS|PROTOTYPE|SCOPE|OVERLOAD") ;
642
643 print Q(<<"EOF") if $ScopeThisXSUB;
644# ENTER;
645# [[
646EOF
647
648 if (!$thisdone && defined($class)) {
649 if (defined($static) or $func_name eq 'new') {
650 print "\tchar *";
651 $var_types{"CLASS"} = "char *";
652 &generate_init("char *", 1, "CLASS");
653 }
654 else {
655 print "\t$class *";
656 $var_types{"THIS"} = "$class *";
657 &generate_init("$class *", 1, "THIS");
658 }
659 }
660
661 # do code
662 if (/^\s*NOT_IMPLEMENTED_YET/) {
663 print "\n\tPerl_croak(aTHX_ \"$pname: not implemented yet\");\n";
664 $_ = '' ;
665 } else {
666 if ($ret_type ne "void") {
667 print "\t" . &map_type($ret_type, 'RETVAL') . ";\n"
668 if !$retvaldone;
669 $args_match{"RETVAL"} = 0;
670 $var_types{"RETVAL"} = $ret_type;
671 print "\tdXSTARG;\n"
672 if $WantOptimize and $targetable{$type_kind{$ret_type}};
673 }
674
675 if (@fake_INPUT or @fake_INPUT_pre) {
676 unshift @line, @fake_INPUT_pre, @fake_INPUT, $_;
677 $_ = "";
678 $processing_arg_with_types = 1;
679 INPUT_handler() ;
680 }
681 print $deferred;
682
683 process_keyword("INIT|ALIAS|ATTRS|PROTOTYPE|INTERFACE_MACRO|INTERFACE|C_ARGS|OVERLOAD") ;
684
685 if (check_keyword("PPCODE")) {
686 print_section();
687 death ("PPCODE must be last thing") if @line;
688 print "\tLEAVE;\n" if $ScopeThisXSUB;
689 print "\tPUTBACK;\n\treturn;\n";
690 } elsif (check_keyword("CODE")) {
691 print_section() ;
692 } elsif (defined($class) and $func_name eq "DESTROY") {
693 print "\n\t";
694 print "delete THIS;\n";
695 } else {
696 print "\n\t";
697 if ($ret_type ne "void") {
698 print "RETVAL = ";
699 $wantRETVAL = 1;
700 }
701 if (defined($static)) {
702 if ($func_name eq 'new') {
703 $func_name = "$class";
704 } else {
705 print "${class}::";
706 }
707 } elsif (defined($class)) {
708 if ($func_name eq 'new') {
709 $func_name .= " $class";
710 } else {
711 print "THIS->";
712 }
713 }
714 $func_name =~ s/^\Q$args{'s'}//
715 if exists $args{'s'};
716 $func_name = 'XSFUNCTION' if $interface;
717 print "$func_name($func_args);\n";
718 }
719 }
720
721 # do output variables
722 $gotRETVAL = 0; # 1 if RETVAL seen in OUTPUT section;
723 undef $RETVAL_code ; # code to set RETVAL (from OUTPUT section);
724 # $wantRETVAL set if 'RETVAL =' autogenerated
725 ($wantRETVAL, $ret_type) = (0, 'void') if $RETVAL_no_return;
726 undef %outargs ;
727 process_keyword("POSTCALL|OUTPUT|ALIAS|ATTRS|PROTOTYPE|OVERLOAD");
728
729 &generate_output($var_types{$_}, $args_match{$_}, $_, $DoSetMagic)
730 for grep $in_out{$_} =~ /OUT$/, keys %in_out;
731
732 # all OUTPUT done, so now push the return value on the stack
733 if ($gotRETVAL && $RETVAL_code) {
734 print "\t$RETVAL_code\n";
735 } elsif ($gotRETVAL || $wantRETVAL) {
736 my $t = $WantOptimize && $targetable{$type_kind{$ret_type}};
737 my $var = 'RETVAL';
738 my $type = $ret_type;
739
740 # 0: type, 1: with_size, 2: how, 3: how_size
741 if ($t and not $t->[1] and $t->[0] eq 'p') {
742 # PUSHp corresponds to setpvn. Treate setpv directly
743 my $what = eval qq("$t->[2]");
744 warn $@ if $@;
745
746 print "\tsv_setpv(TARG, $what); XSprePUSH; PUSHTARG;\n";
747 $prepush_done = 1;
748 }
749 elsif ($t) {
750 my $what = eval qq("$t->[2]");
751 warn $@ if $@;
752
753 my $size = $t->[3];
754 $size = '' unless defined $size;
755 $size = eval qq("$size");
756 warn $@ if $@;
757 print "\tXSprePUSH; PUSH$t->[0]($what$size);\n";
758 $prepush_done = 1;
759 }
760 else {
761 # RETVAL almost never needs SvSETMAGIC()
762 &generate_output($ret_type, 0, 'RETVAL', 0);
763 }
764 }
765
766 $xsreturn = 1 if $ret_type ne "void";
767 my $num = $xsreturn;
768 my $c = @outlist;
769 print "\tXSprePUSH;" if $c and not $prepush_done;
770 print "\tEXTEND(SP,$c);\n" if $c;
771 $xsreturn += $c;
772 generate_output($var_types{$_}, $num++, $_, 0, 1) for @outlist;
773
774 # do cleanup
775 process_keyword("CLEANUP|ALIAS|ATTRS|PROTOTYPE|OVERLOAD") ;
776
777 print Q(<<"EOF") if $ScopeThisXSUB;
778# ]]
779EOF
780 print Q(<<"EOF") if $ScopeThisXSUB and not $PPCODE;
781# LEAVE;
782EOF
783
784 # print function trailer
785 print Q(<<"EOF");
786# ]]
787EOF
788 print Q(<<"EOF") if $except;
789# BEGHANDLERS
790# CATCHALL
791# sprintf(errbuf, "%s: %s\\tpropagated", Xname, Xreason);
792# ENDHANDLERS
793EOF
794 if (check_keyword("CASE")) {
795 blurt ("Error: No `CASE:' at top of function")
796 unless $condnum;
797 $_ = "CASE: $_"; # Restore CASE: label
798 next;
799 }
800 last if $_ eq "$END:";
801 death(/^$BLOCK_re/o ? "Misplaced `$1:'" : "Junk at end of function");
802 }
803
804 print Q(<<"EOF") if $except;
805# if (errbuf[0])
806# Perl_croak(aTHX_ errbuf);
807EOF
808
809 if ($xsreturn) {
810 print Q(<<"EOF") unless $PPCODE;
811# XSRETURN($xsreturn);
812EOF
813 } else {
814 print Q(<<"EOF") unless $PPCODE;
815# XSRETURN_EMPTY;
816EOF
817 }
818
819 print Q(<<"EOF");
820#]]
821#
822EOF
823
824 my $newXS = "newXS" ;
825 my $proto = "" ;
826
827 # Build the prototype string for the xsub
828 if ($ProtoThisXSUB) {
829 $newXS = "newXSproto";
830
831 if ($ProtoThisXSUB eq 2) {
832 # User has specified empty prototype
833 }
834 elsif ($ProtoThisXSUB eq 1) {
835 my $s = ';';
836 if ($min_args < $num_args) {
837 $s = '';
838 $proto_arg[$min_args] .= ";" ;
839 }
840 push @proto_arg, "$s\@"
841 if $elipsis ;
842
843 $proto = join ("", grep defined, @proto_arg);
844 }
845 else {
846 # User has specified a prototype
847 $proto = $ProtoThisXSUB;
848 }
849 $proto = qq{, "$proto"};
850 }
851
852 if (%XsubAliases) {
853 $XsubAliases{$pname} = 0
854 unless defined $XsubAliases{$pname} ;
855 while ( ($name, $value) = each %XsubAliases) {
856 push(@InitFileCode, Q(<<"EOF"));
857# cv = newXS(\"$name\", XS_$Full_func_name, file);
858# XSANY.any_i32 = $value ;
859EOF
860 push(@InitFileCode, Q(<<"EOF")) if $proto;
861# sv_setpv((SV*)cv$proto) ;
862EOF
863 }
864 }
865 elsif (@Attributes) {
866 push(@InitFileCode, Q(<<"EOF"));
867# cv = newXS(\"$pname\", XS_$Full_func_name, file);
868# apply_attrs_string("$Package", cv, "@Attributes", 0);
869EOF
870 }
871 elsif ($interface) {
872 while ( ($name, $value) = each %Interfaces) {
873 $name = "$Package\::$name" unless $name =~ /::/;
874 push(@InitFileCode, Q(<<"EOF"));
875# cv = newXS(\"$name\", XS_$Full_func_name, file);
876# $interface_macro_set(cv,$value) ;
877EOF
878 push(@InitFileCode, Q(<<"EOF")) if $proto;
879# sv_setpv((SV*)cv$proto) ;
880EOF
881 }
882 }
883 else {
884 push(@InitFileCode,
885 " ${newXS}(\"$pname\", XS_$Full_func_name, file$proto);\n");
886 }
887 }
888
889 if ($Overload) # make it findable with fetchmethod
890 {
891 print Q(<<"EOF");
892#XS(XS_${Packid}_nil); /* prototype to pass -Wmissing-prototypes */
893#XS(XS_${Packid}_nil)
894#{
895# XSRETURN_EMPTY;
896#}
897#
898EOF
899 unshift(@InitFileCode, <<"MAKE_FETCHMETHOD_WORK");
900 /* Making a sub named "${Package}::()" allows the package */
901 /* to be findable via fetchmethod(), and causes */
902 /* overload::Overloaded("${Package}") to return true. */
903 newXS("${Package}::()", XS_${Packid}_nil, file$proto);
904MAKE_FETCHMETHOD_WORK
905 }
906
907 # print initialization routine
908
909 print Q(<<"EOF");
910##ifdef __cplusplus
911#extern "C"
912##endif
913EOF
914
915 print Q(<<"EOF");
916#XS(boot_$Module_cname); /* prototype to pass -Wmissing-prototypes */
917#XS(boot_$Module_cname)
918EOF
919
920 print Q(<<"EOF");
921#[[
922# dXSARGS;
923EOF
924
925 #-Wall: if there is no $Full_func_name there are no xsubs in this .xs
926 #so `file' is unused
927 print Q(<<"EOF") if $Full_func_name;
928# char* file = __FILE__;
929EOF
930
931 print Q("#\n");
932
933 print Q(<<"EOF");
934# PERL_UNUSED_VAR(cv); /* -W */
935# PERL_UNUSED_VAR(items); /* -W */
936EOF
937
938 print Q(<<"EOF") if $WantVersionChk ;
939# XS_VERSION_BOOTCHECK ;
940#
941EOF
942
943 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces ;
944# {
945# CV * cv ;
946#
947EOF
948
949 print Q(<<"EOF") if ($Overload);
950# /* register the overloading (type 'A') magic */
951# PL_amagic_generation++;
952# /* The magic for overload gets a GV* via gv_fetchmeth as */
953# /* mentioned above, and looks in the SV* slot of it for */
954# /* the "fallback" status. */
955# sv_setsv(
956# get_sv( "${Package}::()", TRUE ),
957# $Fallback
958# );
959EOF
960
961 print @InitFileCode;
962
963 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces ;
964# }
965EOF
966
967 if (@BootCode)
968 {
969 print "\n /* Initialisation Section */\n\n" ;
970 @line = @BootCode;
971 print_section();
972 print "\n /* End of Initialisation Section */\n\n" ;
973 }
974
975 print Q(<<"EOF");
976# XSRETURN_YES;
977#]]
978#
979EOF
980
981 warn("Please specify prototyping behavior for $filename (see perlxs manual)\n")
982 unless $ProtoUsed ;
983
984 chdir($orig_cwd);
985 select($orig_fh);
986 untie *PSEUDO_STDOUT if tied *PSEUDO_STDOUT;
987
988 return 1;
989}
990
991sub errors { $errors }
992
993sub standard_typemap_locations {
994 # Add all the default typemap locations to the search path
995 my @tm = qw(typemap);
996
997 my $updir = File::Spec->updir;
998 foreach my $dir (File::Spec->catdir(($updir) x 1), File::Spec->catdir(($updir) x 2),
999 File::Spec->catdir(($updir) x 3), File::Spec->catdir(($updir) x 4)) {
1000
1001 unshift @tm, File::Spec->catfile($dir, 'typemap');
1002 unshift @tm, File::Spec->catfile($dir, lib => ExtUtils => 'typemap');
1003 }
1004 foreach my $dir (@INC) {
1005 my $file = File::Spec->catfile($dir, ExtUtils => 'typemap');
1006 unshift @tm, $file if -e $file;
1007 }
1008 return @tm;
1009}
1010
1011sub TrimWhitespace
1012{
1013 $_[0] =~ s/^\s+|\s+$//go ;
1014}
1015
1016sub TidyType
1017 {
1018 local ($_) = @_ ;
1019
1020 # rationalise any '*' by joining them into bunches and removing whitespace
1021 s#\s*(\*+)\s*#$1#g;
1022 s#(\*+)# $1 #g ;
1023
1024 # change multiple whitespace into a single space
1025 s/\s+/ /g ;
1026
1027 # trim leading & trailing whitespace
1028 TrimWhitespace($_) ;
1029
1030 $_ ;
1031}
1032
1033# Input: ($_, @line) == unparsed input.
1034# Output: ($_, @line) == (rest of line, following lines).
1035# Return: the matched keyword if found, otherwise 0
1036sub check_keyword {
1037 $_ = shift(@line) while !/\S/ && @line;
1038 s/^(\s*)($_[0])\s*:\s*(?:#.*)?/$1/s && $2;
1039}
1040
1041sub print_section {
1042 # the "do" is required for right semantics
1043 do { $_ = shift(@line) } while !/\S/ && @line;
1044
1045 print("#line ", $line_no[@line_no - @line -1], " \"$filepathname\"\n")
1046 if $WantLineNumbers && !/^\s*#\s*line\b/ && !/^#if XSubPPtmp/;
1047 for (; defined($_) && !/^$BLOCK_re/o; $_ = shift(@line)) {
1048 print "$_\n";
1049 }
1050 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $WantLineNumbers;
1051}
1052
1053sub merge_section {
1054 my $in = '';
1055
1056 while (!/\S/ && @line) {
1057 $_ = shift(@line);
1058 }
1059
1060 for (; defined($_) && !/^$BLOCK_re/o; $_ = shift(@line)) {
1061 $in .= "$_\n";
1062 }
1063 chomp $in;
1064 return $in;
1065 }
1066
1067sub process_keyword($)
1068 {
1069 my($pattern) = @_ ;
1070 my $kwd ;
1071
1072 &{"${kwd}_handler"}()
1073 while $kwd = check_keyword($pattern) ;
1074 }
1075
1076sub CASE_handler {
1077 blurt ("Error: `CASE:' after unconditional `CASE:'")
1078 if $condnum && $cond eq '';
1079 $cond = $_;
1080 TrimWhitespace($cond);
1081 print " ", ($condnum++ ? " else" : ""), ($cond ? " if ($cond)\n" : "\n");
1082 $_ = '' ;
1083}
1084
1085sub INPUT_handler {
1086 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1087 last if /^\s*NOT_IMPLEMENTED_YET/;
1088 next unless /\S/; # skip blank lines
1089
1090 TrimWhitespace($_) ;
1091 my $line = $_ ;
1092
1093 # remove trailing semicolon if no initialisation
1094 s/\s*;$//g unless /[=;+].*\S/ ;
1095
1096 # Process the length(foo) declarations
1097 if (s/^([^=]*)\blength\(\s*(\w+)\s*\)\s*$/$1 XSauto_length_of_$2=NO_INIT/x) {
1098 print "\tSTRLEN\tSTRLEN_length_of_$2;\n";
1099 $lengthof{$2} = $name;
1100 # $islengthof{$name} = $1;
1101 $deferred .= "\n\tXSauto_length_of_$2 = STRLEN_length_of_$2;";
1102 }
1103
1104 # check for optional initialisation code
1105 my $var_init = '' ;
1106 $var_init = $1 if s/\s*([=;+].*)$//s ;
1107 $var_init =~ s/"/\\"/g;
1108
1109 s/\s+/ /g;
1110 my ($var_type, $var_addr, $var_name) = /^(.*?[^&\s])\s*(\&?)\s*\b(\w+)$/s
1111 or blurt("Error: invalid argument declaration '$line'"), next;
1112
1113 # Check for duplicate definitions
1114 blurt ("Error: duplicate definition of argument '$var_name' ignored"), next
1115 if $arg_list{$var_name}++
1116 or defined $argtype_seen{$var_name} and not $processing_arg_with_types;
1117
1118 $thisdone |= $var_name eq "THIS";
1119 $retvaldone |= $var_name eq "RETVAL";
1120 $var_types{$var_name} = $var_type;
1121 # XXXX This check is a safeguard against the unfinished conversion of
1122 # generate_init(). When generate_init() is fixed,
1123 # one can use 2-args map_type() unconditionally.
1124 if ($var_type =~ / \( \s* \* \s* \) /x) {
1125 # Function pointers are not yet supported with &output_init!
1126 print "\t" . &map_type($var_type, $var_name);
1127 $name_printed = 1;
1128 } else {
1129 print "\t" . &map_type($var_type);
1130 $name_printed = 0;
1131 }
1132 $var_num = $args_match{$var_name};
1133
1134 $proto_arg[$var_num] = ProtoString($var_type)
1135 if $var_num ;
1136 $func_args =~ s/\b($var_name)\b/&$1/ if $var_addr;
1137 if ($var_init =~ /^[=;]\s*NO_INIT\s*;?\s*$/
1138 or $in_out{$var_name} and $in_out{$var_name} =~ /^OUT/
1139 and $var_init !~ /\S/) {
1140 if ($name_printed) {
1141 print ";\n";
1142 } else {
1143 print "\t$var_name;\n";
1144 }
1145 } elsif ($var_init =~ /\S/) {
1146 &output_init($var_type, $var_num, $var_name, $var_init, $name_printed);
1147 } elsif ($var_num) {
1148 # generate initialization code
1149 &generate_init($var_type, $var_num, $var_name, $name_printed);
1150 } else {
1151 print ";\n";
1152 }
1153 }
1154}
1155
1156sub OUTPUT_handler {
1157 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1158 next unless /\S/;
1159 if (/^\s*SETMAGIC\s*:\s*(ENABLE|DISABLE)\s*/) {
1160 $DoSetMagic = ($1 eq "ENABLE" ? 1 : 0);
1161 next;
1162 }
1163 my ($outarg, $outcode) = /^\s*(\S+)\s*(.*?)\s*$/s ;
1164 blurt ("Error: duplicate OUTPUT argument '$outarg' ignored"), next
1165 if $outargs{$outarg} ++ ;
1166 if (!$gotRETVAL and $outarg eq 'RETVAL') {
1167 # deal with RETVAL last
1168 $RETVAL_code = $outcode ;
1169 $gotRETVAL = 1 ;
1170 next ;
1171 }
1172 blurt ("Error: OUTPUT $outarg not an argument"), next
1173 unless defined($args_match{$outarg});
1174 blurt("Error: No input definition for OUTPUT argument '$outarg' - ignored"), next
1175 unless defined $var_types{$outarg} ;
1176 $var_num = $args_match{$outarg};
1177 if ($outcode) {
1178 print "\t$outcode\n";
1179 print "\tSvSETMAGIC(ST(" , $var_num-1 , "));\n" if $DoSetMagic;
1180 } else {
1181 &generate_output($var_types{$outarg}, $var_num, $outarg, $DoSetMagic);
1182 }
1183 delete $in_out{$outarg} # No need to auto-OUTPUT
1184 if exists $in_out{$outarg} and $in_out{$outarg} =~ /OUT$/;
1185 }
1186}
1187
1188sub C_ARGS_handler() {
1189 my $in = merge_section();
1190
1191 TrimWhitespace($in);
1192 $func_args = $in;
1193}
1194
1195sub INTERFACE_MACRO_handler() {
1196 my $in = merge_section();
1197
1198 TrimWhitespace($in);
1199 if ($in =~ /\s/) { # two
1200 ($interface_macro, $interface_macro_set) = split ' ', $in;
1201 } else {
1202 $interface_macro = $in;
1203 $interface_macro_set = 'UNKNOWN_CVT'; # catch later
1204 }
1205 $interface = 1; # local
1206 $Interfaces = 1; # global
1207}
1208
1209sub INTERFACE_handler() {
1210 my $in = merge_section();
1211
1212 TrimWhitespace($in);
1213
1214 foreach (split /[\s,]+/, $in) {
1215 $Interfaces{$_} = $_;
1216 }
1217 print Q(<<"EOF");
1218# XSFUNCTION = $interface_macro($ret_type,cv,XSANY.any_dptr);
1219EOF
1220 $interface = 1; # local
1221 $Interfaces = 1; # global
1222}
1223
1224sub CLEANUP_handler() { print_section() }
1225sub PREINIT_handler() { print_section() }
1226sub POSTCALL_handler() { print_section() }
1227sub INIT_handler() { print_section() }
1228
1229sub GetAliases
1230 {
1231 my ($line) = @_ ;
1232 my ($orig) = $line ;
1233 my ($alias) ;
1234 my ($value) ;
1235
1236 # Parse alias definitions
1237 # format is
1238 # alias = value alias = value ...
1239
1240 while ($line =~ s/^\s*([\w:]+)\s*=\s*(\w+)\s*//) {
1241 $alias = $1 ;
1242 $orig_alias = $alias ;
1243 $value = $2 ;
1244
1245 # check for optional package definition in the alias
1246 $alias = $Packprefix . $alias if $alias !~ /::/ ;
1247
1248 # check for duplicate alias name & duplicate value
1249 Warn("Warning: Ignoring duplicate alias '$orig_alias'")
1250 if defined $XsubAliases{$alias} ;
1251
1252 Warn("Warning: Aliases '$orig_alias' and '$XsubAliasValues{$value}' have identical values")
1253 if $XsubAliasValues{$value} ;
1254
1255 $XsubAliases = 1;
1256 $XsubAliases{$alias} = $value ;
1257 $XsubAliasValues{$value} = $orig_alias ;
1258 }
1259
1260 blurt("Error: Cannot parse ALIAS definitions from '$orig'")
1261 if $line ;
1262 }
1263
1264sub ATTRS_handler ()
1265 {
1266 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1267 next unless /\S/;
1268 TrimWhitespace($_) ;
1269 push @Attributes, $_;
1270 }
1271 }
1272
1273sub ALIAS_handler ()
1274 {
1275 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1276 next unless /\S/;
1277 TrimWhitespace($_) ;
1278 GetAliases($_) if $_ ;
1279 }
1280 }
1281
1282sub OVERLOAD_handler()
1283{
1284 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1285 next unless /\S/;
1286 TrimWhitespace($_) ;
1287 while ( s/^\s*([\w:"\\)\+\-\*\/\%\<\>\.\&\|\^\!\~\{\}\=]+)\s*//) {
1288 $Overload = 1 unless $Overload;
1289 my $overload = "$Package\::(".$1 ;
1290 push(@InitFileCode,
1291 " newXS(\"$overload\", XS_$Full_func_name, file$proto);\n");
1292 }
1293 }
1294}
1295
1296sub FALLBACK_handler()
1297{
1298 # the rest of the current line should contain either TRUE,
1299 # FALSE or UNDEF
1300
1301 TrimWhitespace($_) ;
1302 my %map = (
1303 TRUE => "PL_sv_yes", 1 => "PL_sv_yes",
1304 FALSE => "PL_sv_no", 0 => "PL_sv_no",
1305 UNDEF => "PL_sv_undef",
1306 ) ;
1307
1308 # check for valid FALLBACK value
1309 death ("Error: FALLBACK: TRUE/FALSE/UNDEF") unless exists $map{uc $_} ;
1310
1311 $Fallback = $map{uc $_} ;
1312}
1313
1314
1315sub REQUIRE_handler ()
1316 {
1317 # the rest of the current line should contain a version number
1318 my ($Ver) = $_ ;
1319
1320 TrimWhitespace($Ver) ;
1321
1322 death ("Error: REQUIRE expects a version number")
1323 unless $Ver ;
1324
1325 # check that the version number is of the form n.n
1326 death ("Error: REQUIRE: expected a number, got '$Ver'")
1327 unless $Ver =~ /^\d+(\.\d*)?/ ;
1328
1329 death ("Error: xsubpp $Ver (or better) required--this is only $VERSION.")
1330 unless $VERSION >= $Ver ;
1331 }
1332
1333sub VERSIONCHECK_handler ()
1334 {
1335 # the rest of the current line should contain either ENABLE or
1336 # DISABLE
1337
1338 TrimWhitespace($_) ;
1339
1340 # check for ENABLE/DISABLE
1341 death ("Error: VERSIONCHECK: ENABLE/DISABLE")
1342 unless /^(ENABLE|DISABLE)/i ;
1343
1344 $WantVersionChk = 1 if $1 eq 'ENABLE' ;
1345 $WantVersionChk = 0 if $1 eq 'DISABLE' ;
1346
1347 }
1348
1349sub PROTOTYPE_handler ()
1350 {
1351 my $specified ;
1352
1353 death("Error: Only 1 PROTOTYPE definition allowed per xsub")
1354 if $proto_in_this_xsub ++ ;
1355
1356 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1357 next unless /\S/;
1358 $specified = 1 ;
1359 TrimWhitespace($_) ;
1360 if ($_ eq 'DISABLE') {
1361 $ProtoThisXSUB = 0
1362 } elsif ($_ eq 'ENABLE') {
1363 $ProtoThisXSUB = 1
1364 } else {
1365 # remove any whitespace
1366 s/\s+//g ;
1367 death("Error: Invalid prototype '$_'")
1368 unless ValidProtoString($_) ;
1369 $ProtoThisXSUB = C_string($_) ;
1370 }
1371 }
1372
1373 # If no prototype specified, then assume empty prototype ""
1374 $ProtoThisXSUB = 2 unless $specified ;
1375
1376 $ProtoUsed = 1 ;
1377
1378 }
1379
1380sub SCOPE_handler ()
1381 {
1382 death("Error: Only 1 SCOPE declaration allowed per xsub")
1383 if $scope_in_this_xsub ++ ;
1384
1385 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1386 next unless /\S/;
1387 TrimWhitespace($_) ;
1388 if ($_ =~ /^DISABLE/i) {
1389 $ScopeThisXSUB = 0
1390 } elsif ($_ =~ /^ENABLE/i) {
1391 $ScopeThisXSUB = 1
1392 }
1393 }
1394
1395 }
1396
1397sub PROTOTYPES_handler ()
1398 {
1399 # the rest of the current line should contain either ENABLE or
1400 # DISABLE
1401
1402 TrimWhitespace($_) ;
1403
1404 # check for ENABLE/DISABLE
1405 death ("Error: PROTOTYPES: ENABLE/DISABLE")
1406 unless /^(ENABLE|DISABLE)/i ;
1407
1408 $WantPrototypes = 1 if $1 eq 'ENABLE' ;
1409 $WantPrototypes = 0 if $1 eq 'DISABLE' ;
1410 $ProtoUsed = 1 ;
1411
1412 }
1413
1414sub INCLUDE_handler ()
1415 {
1416 # the rest of the current line should contain a valid filename
1417
1418 TrimWhitespace($_) ;
1419
1420 death("INCLUDE: filename missing")
1421 unless $_ ;
1422
1423 death("INCLUDE: output pipe is illegal")
1424 if /^\s*\|/ ;
1425
1426 # simple minded recursion detector
1427 death("INCLUDE loop detected")
1428 if $IncludedFiles{$_} ;
1429
1430 ++ $IncludedFiles{$_} unless /\|\s*$/ ;
1431
1432 # Save the current file context.
1433 push(@XSStack, {
1434 type => 'file',
1435 LastLine => $lastline,
1436 LastLineNo => $lastline_no,
1437 Line => \@line,
1438 LineNo => \@line_no,
1439 Filename => $filename,
1440 Handle => $FH,
1441 }) ;
1442
1443 ++ $FH ;
1444
1445 # open the new file
1446 open ($FH, "$_") or death("Cannot open '$_': $!") ;
1447
1448 print Q(<<"EOF");
1449#
1450#/* INCLUDE: Including '$_' from '$filename' */
1451#
1452EOF
1453
1454 $filename = $_ ;
1455
1456 # Prime the pump by reading the first
1457 # non-blank line
1458
1459 # skip leading blank lines
1460 while (<$FH>) {
1461 last unless /^\s*$/ ;
1462 }
1463
1464 $lastline = $_ ;
1465 $lastline_no = $. ;
1466
1467 }
1468
1469sub PopFile()
1470 {
1471 return 0 unless $XSStack[-1]{type} eq 'file' ;
1472
1473 my $data = pop @XSStack ;
1474 my $ThisFile = $filename ;
1475 my $isPipe = ($filename =~ /\|\s*$/) ;
1476
1477 -- $IncludedFiles{$filename}
1478 unless $isPipe ;
1479
1480 close $FH ;
1481
1482 $FH = $data->{Handle} ;
1483 $filename = $data->{Filename} ;
1484 $lastline = $data->{LastLine} ;
1485 $lastline_no = $data->{LastLineNo} ;
1486 @line = @{ $data->{Line} } ;
1487 @line_no = @{ $data->{LineNo} } ;
1488
1489 if ($isPipe and $? ) {
1490 -- $lastline_no ;
1491 print STDERR "Error reading from pipe '$ThisFile': $! in $filename, line $lastline_no\n" ;
1492 exit 1 ;
1493 }
1494
1495 print Q(<<"EOF");
1496#
1497#/* INCLUDE: Returning to '$filename' from '$ThisFile' */
1498#
1499EOF
1500
1501 return 1 ;
1502 }
1503
1504sub ValidProtoString ($)
1505 {
1506 my($string) = @_ ;
1507
1508 if ( $string =~ /^$proto_re+$/ ) {
1509 return $string ;
1510 }
1511
1512 return 0 ;
1513 }
1514
1515sub C_string ($)
1516 {
1517 my($string) = @_ ;
1518
1519 $string =~ s[\\][\\\\]g ;
1520 $string ;
1521 }
1522
1523sub ProtoString ($)
1524 {
1525 my ($type) = @_ ;
1526
1527 $proto_letter{$type} or "\$" ;
1528 }
1529
1530sub check_cpp {
1531 my @cpp = grep(/^\#\s*(?:if|e\w+)/, @line);
1532 if (@cpp) {
1533 my ($cpp, $cpplevel);
1534 for $cpp (@cpp) {
1535 if ($cpp =~ /^\#\s*if/) {
1536 $cpplevel++;
1537 } elsif (!$cpplevel) {
1538 Warn("Warning: #else/elif/endif without #if in this function");
1539 print STDERR " (precede it with a blank line if the matching #if is outside the function)\n"
1540 if $XSStack[-1]{type} eq 'if';
1541 return;
1542 } elsif ($cpp =~ /^\#\s*endif/) {
1543 $cpplevel--;
1544 }
1545 }
1546 Warn("Warning: #if without #endif in this function") if $cpplevel;
1547 }
1548}
1549
1550
1551sub Q {
1552 my($text) = @_;
1553 $text =~ s/^#//gm;
1554 $text =~ s/\[\[/{/g;
1555 $text =~ s/\]\]/}/g;
1556 $text;
1557}
1558
1559# Read next xsub into @line from ($lastline, <$FH>).
1560sub fetch_para {
1561 # parse paragraph
1562 death ("Error: Unterminated `#if/#ifdef/#ifndef'")
1563 if !defined $lastline && $XSStack[-1]{type} eq 'if';
1564 @line = ();
1565 @line_no = () ;
1566 return PopFile() if !defined $lastline;
1567
1568 if ($lastline =~
1569 /^MODULE\s*=\s*([\w:]+)(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/) {
1570 $Module = $1;
1571 $Package = defined($2) ? $2 : ''; # keep -w happy
1572 $Prefix = defined($3) ? $3 : ''; # keep -w happy
1573 $Prefix = quotemeta $Prefix ;
1574 ($Module_cname = $Module) =~ s/\W/_/g;
1575 ($Packid = $Package) =~ tr/:/_/;
1576 $Packprefix = $Package;
1577 $Packprefix .= "::" if $Packprefix ne "";
1578 $lastline = "";
1579 }
1580
1581 for (;;) {
1582 # Skip embedded PODs
1583 while ($lastline =~ /^=/) {
1584 while ($lastline = <$FH>) {
1585 last if ($lastline =~ /^=cut\s*$/);
1586 }
1587 death ("Error: Unterminated pod") unless $lastline;
1588 $lastline = <$FH>;
1589 chomp $lastline;
1590 $lastline =~ s/^\s+$//;
1591 }
1592 if ($lastline !~ /^\s*#/ ||
1593 # CPP directives:
1594 # ANSI: if ifdef ifndef elif else endif define undef
1595 # line error pragma
1596 # gcc: warning include_next
1597 # obj-c: import
1598 # others: ident (gcc notes that some cpps have this one)
1599 $lastline =~ /^#[ \t]*(?:(?:if|ifn?def|elif|else|endif|define|undef|pragma|error|warning|line\s+\d+|ident)\b|(?:include(?:_next)?|import)\s*["<].*[>"])/) {
1600 last if $lastline =~ /^\S/ && @line && $line[-1] eq "";
1601 push(@line, $lastline);
1602 push(@line_no, $lastline_no) ;
1603 }
1604
1605 # Read next line and continuation lines
1606 last unless defined($lastline = <$FH>);
1607 $lastline_no = $.;
1608 my $tmp_line;
1609 $lastline .= $tmp_line
1610 while ($lastline =~ /\\$/ && defined($tmp_line = <$FH>));
1611
1612 chomp $lastline;
1613 $lastline =~ s/^\s+$//;
1614 }
1615 pop(@line), pop(@line_no) while @line && $line[-1] eq "";
1616 1;
1617}
1618
1619sub output_init {
1620 local($type, $num, $var, $init, $name_printed) = @_;
1621 local($arg) = "ST(" . ($num - 1) . ")";
1622
1623 if ( $init =~ /^=/ ) {
1624 if ($name_printed) {
1625 eval qq/print " $init\\n"/;
1626 } else {
1627 eval qq/print "\\t$var $init\\n"/;
1628 }
1629 warn $@ if $@;
1630 } else {
1631 if ( $init =~ s/^\+// && $num ) {
1632 &generate_init($type, $num, $var, $name_printed);
1633 } elsif ($name_printed) {
1634 print ";\n";
1635 $init =~ s/^;//;
1636 } else {
1637 eval qq/print "\\t$var;\\n"/;
1638 warn $@ if $@;
1639 $init =~ s/^;//;
1640 }
1641 $deferred .= eval qq/"\\n\\t$init\\n"/;
1642 warn $@ if $@;
1643 }
1644}
1645
1646sub Warn
1647 {
1648 # work out the line number
1649 my $line_no = $line_no[@line_no - @line -1] ;
1650
1651 print STDERR "@_ in $filename, line $line_no\n" ;
1652 }
1653
1654sub blurt
1655 {
1656 Warn @_ ;
1657 $errors ++
1658 }
1659
1660sub death
1661 {
1662 Warn @_ ;
1663 exit 1 ;
1664 }
1665
1666sub generate_init {
1667 local($type, $num, $var) = @_;
1668 local($arg) = "ST(" . ($num - 1) . ")";
1669 local($argoff) = $num - 1;
1670 local($ntype);
1671 local($tk);
1672
1673 $type = TidyType($type) ;
1674 blurt("Error: '$type' not in typemap"), return
1675 unless defined($type_kind{$type});
1676
1677 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1678 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1679 $tk = $type_kind{$type};
1680 $tk =~ s/OBJ$/REF/ if $func_name =~ /DESTROY$/;
1681 if ($tk eq 'T_PV' and exists $lengthof{$var}) {
1682 print "\t$var" unless $name_printed;
1683 print " = ($type)SvPV($arg, STRLEN_length_of_$var);\n";
1684 die "default value not supported with length(NAME) supplied"
1685 if defined $defaults{$var};
1686 return;
1687 }
1688 $type =~ tr/:/_/ unless $hiertype;
1689 blurt("Error: No INPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1690 unless defined $input_expr{$tk} ;
1691 $expr = $input_expr{$tk};
1692 if ($expr =~ /DO_ARRAY_ELEM/) {
1693 blurt("Error: '$subtype' not in typemap"), return
1694 unless defined($type_kind{$subtype});
1695 blurt("Error: No INPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1696 unless defined $input_expr{$type_kind{$subtype}} ;
1697 $subexpr = $input_expr{$type_kind{$subtype}};
1698 $subexpr =~ s/\$type/\$subtype/g;
1699 $subexpr =~ s/ntype/subtype/g;
1700 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1701 $subexpr =~ s/\n\t/\n\t\t/g;
1702 $subexpr =~ s/is not of (.*\")/[arg %d] is not of $1, ix_$var + 1/g;
1703 $subexpr =~ s/\$var/${var}[ix_$var - $argoff]/;
1704 $expr =~ s/DO_ARRAY_ELEM/$subexpr/;
1705 }
1706 if ($expr =~ m#/\*.*scope.*\*/#i) { # "scope" in C comments
1707 $ScopeThisXSUB = 1;
1708 }
1709 if (defined($defaults{$var})) {
1710 $expr =~ s/(\t+)/$1 /g;
1711 $expr =~ s/ /\t/g;
1712 if ($name_printed) {
1713 print ";\n";
1714 } else {
1715 eval qq/print "\\t$var;\\n"/;
1716 warn $@ if $@;
1717 }
1718 if ($defaults{$var} eq 'NO_INIT') {
1719 $deferred .= eval qq/"\\n\\tif (items >= $num) {\\n$expr;\\n\\t}\\n"/;
1720 } else {
1721 $deferred .= eval qq/"\\n\\tif (items < $num)\\n\\t $var = $defaults{$var};\\n\\telse {\\n$expr;\\n\\t}\\n"/;
1722 }
1723 warn $@ if $@;
1724 } elsif ($ScopeThisXSUB or $expr !~ /^\s*\$var =/) {
1725 if ($name_printed) {
1726 print ";\n";
1727 } else {
1728 eval qq/print "\\t$var;\\n"/;
1729 warn $@ if $@;
1730 }
1731 $deferred .= eval qq/"\\n$expr;\\n"/;
1732 warn $@ if $@;
1733 } else {
1734 die "panic: do not know how to handle this branch for function pointers"
1735 if $name_printed;
1736 eval qq/print "$expr;\\n"/;
1737 warn $@ if $@;
1738 }
1739}
1740
1741sub generate_output {
1742 local($type, $num, $var, $do_setmagic, $do_push) = @_;
1743 local($arg) = "ST(" . ($num - ($num != 0)) . ")";
1744 local($argoff) = $num - 1;
1745 local($ntype);
1746
1747 $type = TidyType($type) ;
1748 if ($type =~ /^array\(([^,]*),(.*)\)/) {
1749 print "\t$arg = sv_newmortal();\n";
1750 print "\tsv_setpvn($arg, (char *)$var, $2 * sizeof($1));\n";
1751 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1752 } else {
1753 blurt("Error: '$type' not in typemap"), return
1754 unless defined($type_kind{$type});
1755 blurt("Error: No OUTPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1756 unless defined $output_expr{$type_kind{$type}} ;
1757 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1758 $ntype =~ s/\(\)//g;
1759 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1760 $expr = $output_expr{$type_kind{$type}};
1761 if ($expr =~ /DO_ARRAY_ELEM/) {
1762 blurt("Error: '$subtype' not in typemap"), return
1763 unless defined($type_kind{$subtype});
1764 blurt("Error: No OUTPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1765 unless defined $output_expr{$type_kind{$subtype}} ;
1766 $subexpr = $output_expr{$type_kind{$subtype}};
1767 $subexpr =~ s/ntype/subtype/g;
1768 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1769 $subexpr =~ s/\$var/${var}[ix_$var]/g;
1770 $subexpr =~ s/\n\t/\n\t\t/g;
1771 $expr =~ s/DO_ARRAY_ELEM\n/$subexpr/;
1772 eval "print qq\a$expr\a";
1773 warn $@ if $@;
1774 print "\t\tSvSETMAGIC(ST(ix_$var));\n" if $do_setmagic;
1775 } elsif ($var eq 'RETVAL') {
1776 if ($expr =~ /^\t\$arg = new/) {
1777 # We expect that $arg has refcnt 1, so we need to
1778 # mortalize it.
1779 eval "print qq\a$expr\a";
1780 warn $@ if $@;
1781 print "\tsv_2mortal(ST($num));\n";
1782 print "\tSvSETMAGIC(ST($num));\n" if $do_setmagic;
1783 } elsif ($expr =~ /^\s*\$arg\s*=/) {
1784 # We expect that $arg has refcnt >=1, so we need
1785 # to mortalize it!
1786 eval "print qq\a$expr\a";
1787 warn $@ if $@;
1788 print "\tsv_2mortal(ST(0));\n";
1789 print "\tSvSETMAGIC(ST(0));\n" if $do_setmagic;
1790 } else {
1791 # Just hope that the entry would safely write it
1792 # over an already mortalized value. By
1793 # coincidence, something like $arg = &sv_undef
1794 # works too.
1795 print "\tST(0) = sv_newmortal();\n";
1796 eval "print qq\a$expr\a";
1797 warn $@ if $@;
1798 # new mortals don't have set magic
1799 }
1800 } elsif ($do_push) {
1801 print "\tPUSHs(sv_newmortal());\n";
1802 $arg = "ST($num)";
1803 eval "print qq\a$expr\a";
1804 warn $@ if $@;
1805 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1806 } elsif ($arg =~ /^ST\(\d+\)$/) {
1807 eval "print qq\a$expr\a";
1808 warn $@ if $@;
1809 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1810 }
1811 }
1812}
1813
1814sub map_type {
1815 my($type, $varname) = @_;
1816
1817 # C++ has :: in types too so skip this
1818 $type =~ tr/:/_/ unless $hiertype;
1819 $type =~ s/^array\(([^,]*),(.*)\).*/$1 */s;
1820 if ($varname) {
1821 if ($varname && $type =~ / \( \s* \* (?= \s* \) ) /xg) {
1822 (substr $type, pos $type, 0) = " $varname ";
1823 } else {
1824 $type .= "\t$varname";
1825 }
1826 }
1827 $type;
1828}
1829
1830
1831#########################################################
1832package
1833 ExtUtils::ParseXS::CountLines;
1834use strict;
1835use vars qw($SECTION_END_MARKER);
1836
1837sub TIEHANDLE {
1838 my ($class, $cfile, $fh) = @_;
1839 $cfile =~ s/\\/\\\\/g;
1840 $SECTION_END_MARKER = qq{#line --- "$cfile"};
1841
1842 return bless {buffer => '',
1843 fh => $fh,
1844 line_no => 1,
1845 }, $class;
1846}
1847
1848sub PRINT {
1849 my $self = shift;
1850 for (@_) {
1851 $self->{buffer} .= $_;
1852 while ($self->{buffer} =~ s/^([^\n]*\n)//) {
1853 my $line = $1;
1854 ++ $self->{line_no};
1855 $line =~ s|^\#line\s+---(?=\s)|#line $self->{line_no}|;
1856 print {$self->{fh}} $line;
1857 }
1858 }
1859}
1860
1861sub PRINTF {
1862 my $self = shift;
1863 my $fmt = shift;
1864 $self->PRINT(sprintf($fmt, @_));
1865}
1866
1867sub DESTROY {
1868 # Not necessary if we're careful to end with a "\n"
1869 my $self = shift;
1870 print {$self->{fh}} $self->{buffer};
1871}
1872
1873sub UNTIE {
1874 # This sub does nothing, but is neccessary for references to be released.
1875}
1876
1877sub end_marker {
1878 return $SECTION_END_MARKER;
1879}
1880
1881
18821;
1883__END__
1884
1885=head1 NAME
1886
1887ExtUtils::ParseXS - converts Perl XS code into C code
1888
1889=head1 SYNOPSIS
1890
1891 use ExtUtils::ParseXS qw(process_file);
1892
1893 process_file( filename => 'foo.xs' );
1894
1895 process_file( filename => 'foo.xs',
1896 output => 'bar.c',
1897 'C++' => 1,
1898 typemap => 'path/to/typemap',
1899 hiertype => 1,
1900 except => 1,
1901 prototypes => 1,
1902 versioncheck => 1,
1903 linenumbers => 1,
1904 optimize => 1,
1905 prototypes => 1,
1906 );
1907=head1 DESCRIPTION
1908
1909C<ExtUtils::ParseXS> will compile XS code into C code by embedding the constructs
1910necessary to let C functions manipulate Perl values and creates the glue
1911necessary to let Perl access those functions. The compiler uses typemaps to
1912determine how to map C function parameters and variables to Perl values.
1913
1914The compiler will search for typemap files called I<typemap>. It will use
1915the following search path to find default typemaps, with the rightmost
1916typemap taking precedence.
1917
1918 ../../../typemap:../../typemap:../typemap:typemap
1919
1920=head1 EXPORT
1921
1922None by default. C<process_file()> may be exported upon request.
1923
1924
1925=head1 FUNCTIONS
1926
1927=over 4
1928
1929=item process_xs()
1930
1931This function processes an XS file and sends output to a C file.
1932Named parameters control how the processing is done. The following
1933parameters are accepted:
1934
1935=over 4
1936
1937=item B<C++>
1938
1939Adds C<extern "C"> to the C code. Default is false.
1940
1941=item B<hiertype>
1942
1943Retains C<::> in type names so that C++ hierachical types can be
1944mapped. Default is false.
1945
1946=item B<except>
1947
1948Adds exception handling stubs to the C code. Default is false.
1949
1950=item B<typemap>
1951
1952Indicates that a user-supplied typemap should take precedence over the
1953default typemaps. A single typemap may be specified as a string, or
1954multiple typemaps can be specified in an array reference, with the
1955last typemap having the highest precedence.
1956
1957=item B<prototypes>
1958
1959Generates prototype code for all xsubs. Default is false.
1960
1961=item B<versioncheck>
1962
1963Makes sure at run time that the object file (derived from the C<.xs>
1964file) and the C<.pm> files have the same version number. Default is
1965true.
1966
1967=item B<linenumbers>
1968
1969Adds C<#line> directives to the C output so error messages will look
1970like they came from the original XS file. Default is true.
1971
1972=item B<optimize>
1973
1974Enables certain optimizations. The only optimization that is currently
1975affected is the use of I<target>s by the output C code (see L<perlguts>).
1976Not optimizing may significantly slow down the generated code, but this is the way
1977B<xsubpp> of 5.005 and earlier operated. Default is to optimize.
1978
1979=item B<inout>
1980
1981Enable recognition of C<IN>, C<OUT_LIST> and C<INOUT_LIST>
1982declarations. Default is true.
1983
1984=item B<argtypes>
1985
1986Enable recognition of ANSI-like descriptions of function signature.
1987Default is true.
1988
1989=item B<s>
1990
1991I have no clue what this does. Strips function prefixes?
1992
1993=back
1994
1995=item errors()
1996
1997This function returns the number of [a certain kind of] errors
1998encountered during processing of the XS file.
1999
2000=back
2001
2002=head1 AUTHOR
2003
2004Based on xsubpp code, written by Larry Wall.
2005
2006Maintained by Ken Williams, <ken@mathforum.org>
2007
2008=head1 COPYRIGHT
2009
2010Copyright 2002-2003 Ken Williams. All rights reserved.
2011
2012This library is free software; you can redistribute it and/or
2013modify it under the same terms as Perl itself.
2014
2015Based on the ExtUtils::xsubpp code by Larry Wall and the Perl 5
2016Porters, which was released under the same license terms.
2017
2018=head1 SEE ALSO
2019
2020L<perl>, ExtUtils::xsubpp, ExtUtils::MakeMaker, L<perlxs>, L<perlxstut>.
2021
2022=cut
Unnamed repository; edit this file to name it for gitweb.