1 package ExtUtils::ParseXS;
4 use 5.006; # We use /??{}/ in regexes
11 use ExtUtils::ParseXS::Constants ();
12 use ExtUtils::ParseXS::CountLines;
13 use ExtUtils::ParseXS::Utilities qw(
14 standard_typemap_locations
24 our @ISA = qw(Exporter);
30 $VERSION = eval $VERSION if $VERSION =~ /_/;
33 # The scalars in the line below remain as 'our' variables because pulling
34 # them into $self led to build problems. In most cases, strings being
35 # 'eval'-ed contain the variables' names hard-coded.
36 $FH, $Package, $func_name, $Full_func_name, $Packid, $pname, $ALIAS,
38 %IncludedFiles, %input_expr, %output_expr,
39 %type_kind, %proto_letter,
40 @line, %args_match, %defaults, %var_types, %arg_list, @proto_arg,
41 %argtype_seen, %in_out, %lengthof,
43 %XsubAliases, %XsubAliasValues, %Interfaces, @Attributes, %outargs,
46 our ($DoSetMagic, $newXS, $proto, $Module_cname, $XsubAliases, $Interfaces, $var_num, );
52 # Allow for $package->process_file(%hash) in the future
53 my ($pkg, %options) = @_ % 2 ? @_ : (__PACKAGE__, @_);
55 $self->{ProtoUsed} = exists $options{prototypes};
72 $args{except} = $args{except} ? ' TRY' : '';
76 my ($Is_VMS, $SymSet);
79 # Establish set of global symbols with max length 28, since xsubpp
80 # will later add the 'XS_' prefix.
81 require ExtUtils::XSSymSet;
82 $SymSet = new ExtUtils::XSSymSet 28;
84 @XSStack = ({type => 'none'});
86 my $cpp_next_tmp = 'XSubPPtmpAAAA';
87 @InitFileCode = @ExtUtils::ParseXS::Constants::InitFileCode;
88 $FH = $ExtUtils::ParseXS::Constants::FH;
89 $self->{Overload} = $ExtUtils::ParseXS::Constants::Overload;
90 $self->{errors} = $ExtUtils::ParseXS::Constants::errors;
91 $self->{Fallback} = $ExtUtils::ParseXS::Constants::Fallback;
93 # Most of the 1500 lines below uses these globals. We'll have to
94 # clean this up sometime, probably. For now, we just pull them out
97 $self->{hiertype} = $args{hiertype};
98 $self->{WantPrototypes} = $args{prototypes};
99 $self->{WantVersionChk} = $args{versioncheck};
100 $self->{WantLineNumbers} = $args{linenumbers};
102 for my $f ($args{filename}) {
103 die "Missing required parameter 'filename'" unless $f;
104 $self->{filepathname} = $f;
105 ($self->{dir}, $self->{filename}) = (dirname($f), basename($f));
106 $self->{filepathname} =~ s/\\/\\\\/g;
107 $IncludedFiles{$f}++;
110 # Open the output file if given as a string. If they provide some
111 # other kind of reference, trust them that we can print to it.
112 if (not ref $args{output}) {
113 open my($fh), "> $args{output}" or die "Can't create $args{output}: $!";
114 $args{outfile} = $args{output};
118 # Really, we shouldn't have to chdir() or select() in the first
119 # place. For now, just save & restore.
120 my $orig_cwd = cwd();
121 my $orig_fh = select();
125 my $csuffix = $args{csuffix};
127 if ($self->{WantLineNumbers}) {
129 if ( $args{outfile} ) {
130 $cfile = $args{outfile};
133 $cfile = $args{filename};
134 $cfile =~ s/\.xs$/$csuffix/i or $cfile .= $csuffix;
136 tie(*PSEUDO_STDOUT, 'ExtUtils::ParseXS::CountLines', $cfile, $args{output});
137 select PSEUDO_STDOUT;
140 select $args{output};
143 my ($type_kind_ref, $proto_letter_ref, $input_expr_ref, $output_expr_ref) =
144 process_typemaps( $args{typemap}, $pwd );
146 %type_kind = %{ $type_kind_ref };
147 %proto_letter = %{ $proto_letter_ref };
148 %input_expr = %{ $input_expr_ref };
149 %output_expr = %{ $output_expr_ref };
151 foreach my $value (values %input_expr) {
152 $value =~ s/;*\s+\z//;
153 # Move C pre-processor instructions to column 1 to be strictly ANSI
154 # conformant. Some pre-processors are fussy about this.
155 $value =~ s/^\s+#/#/mg;
157 foreach my $value (values %output_expr) {
159 $value =~ s/^\s+#/#/mg;
162 my %targetable = make_targetable(\%output_expr);
164 my $END = "!End!\n\n"; # "impossible" keyword (multiple newline)
166 # Match an XS keyword
167 $self->{BLOCK_re} = '\s*(' .
168 join('|' => @ExtUtils::ParseXS::Constants::keywords) .
171 our ($C_group_rex, $C_arg);
172 # Group in C (no support for comments or literals)
173 $C_group_rex = qr/ [({\[]
174 (?: (?> [^()\[\]{}]+ ) | (??{ $C_group_rex }) )*
176 # Chunk in C without comma at toplevel (no comments):
177 $C_arg = qr/ (?: (?> [^()\[\]{},"']+ )
178 | (??{ $C_group_rex })
179 | " (?: (?> [^\\"]+ )
181 )* " # String literal
182 | ' (?: (?> [^\\']+ ) | \\. )* ' # Char literal
185 # Identify the version of xsubpp used
188 * This file was generated automatically by ExtUtils::ParseXS version $VERSION from the
189 * contents of $self->{filename}. Do not edit this file, edit $self->{filename} instead.
191 * ANY CHANGES MADE HERE WILL BE LOST!
198 print("#line 1 \"$self->{filepathname}\"\n")
199 if $self->{WantLineNumbers};
201 # Open the input file (using $self->{filename} which
202 # is a basename'd $args{filename} due to chdir above)
203 open($FH, $self->{filename}) or die "cannot open $self->{filename}: $!\n";
208 my $podstartline = $.;
211 # We can't just write out a /* */ comment, as our embedded
212 # POD might itself be in a comment. We can't put a /**/
213 # comment inside #if 0, as the C standard says that the source
214 # file is decomposed into preprocessing characters in the stage
215 # before preprocessing commands are executed.
216 # I don't want to leave the text as barewords, because the spec
217 # isn't clear whether macros are expanded before or after
218 # preprocessing commands are executed, and someone pathological
219 # may just have defined one of the 3 words as a macro that does
220 # something strange. Multiline strings are illegal in C, so
221 # the "" we write must be a string literal. And they aren't
222 # concatenated until 2 steps later, so we are safe.
224 print("#if 0\n \"Skipped embedded POD.\"\n#endif\n");
225 printf("#line %d \"$self->{filepathname}\"\n", $. + 1)
226 if $self->{WantLineNumbers};
231 # At this point $. is at end of file so die won't state the start
232 # of the problem, and as we haven't yet read any lines &death won't
233 # show the correct line in the message either.
234 die ("Error: Unterminated pod in $self->{filename}, line $podstartline\n")
235 unless $self->{lastline};
237 last if ($Package, $self->{Prefix}) =
238 /^MODULE\s*=\s*[\w:]+(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/;
242 unless (defined $_) {
243 warn "Didn't find a 'MODULE ... PACKAGE ... PREFIX' line\n";
244 exit 0; # Not a fatal error for the caller process
247 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $self->{WantLineNumbers};
250 #ifndef PERL_UNUSED_VAR
251 # define PERL_UNUSED_VAR(var) if (0) var = var
257 #ifndef PERL_ARGS_ASSERT_CROAK_XS_USAGE
258 #define PERL_ARGS_ASSERT_CROAK_XS_USAGE assert(cv); assert(params)
260 /* prototype to pass -Wmissing-prototypes */
262 S_croak_xs_usage(pTHX_ const CV *const cv, const char *const params);
265 S_croak_xs_usage(pTHX_ const CV *const cv, const char *const params)
267 const GV *const gv = CvGV(cv);
269 PERL_ARGS_ASSERT_CROAK_XS_USAGE;
272 const char *const gvname = GvNAME(gv);
273 const HV *const stash = GvSTASH(gv);
274 const char *const hvname = stash ? HvNAME(stash) : NULL;
277 Perl_croak(aTHX_ "Usage: %s::%s(%s)", hvname, gvname, params);
279 Perl_croak(aTHX_ "Usage: %s(%s)", gvname, params);
281 /* Pants. I don't think that it should be possible to get here. */
282 Perl_croak(aTHX_ "Usage: CODE(0x%"UVxf")(%s)", PTR2UV(cv), params);
285 #undef PERL_ARGS_ASSERT_CROAK_XS_USAGE
287 #ifdef PERL_IMPLICIT_CONTEXT
288 #define croak_xs_usage(a,b) S_croak_xs_usage(aTHX_ a,b)
290 #define croak_xs_usage S_croak_xs_usage
295 /* NOTE: the prototype of newXSproto() is different in versions of perls,
296 * so we define a portable version of newXSproto()
299 #define newXSproto_portable(name, c_impl, file, proto) newXS_flags(name, c_impl, file, proto, 0)
301 #define newXSproto_portable(name, c_impl, file, proto) (PL_Sv=(SV*)newXS(name, c_impl, file), sv_setpv(PL_Sv, proto), (CV*)PL_Sv)
302 #endif /* !defined(newXS_flags) */
306 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $self->{WantLineNumbers};
308 $self->{lastline} = $_;
309 $self->{lastline_no} = $.;
311 my (@BootCode, @outlist, $prepush_done, $xsreturn, $func_header, $orig_args, );
313 while (fetch_para()) {
314 # Print initial preprocessor statements and blank lines
315 while (@line && $line[0] !~ /^[^\#]/) {
316 my $ln = shift(@line);
318 next unless $ln =~ /^\#\s*((if)(?:n?def)?|elsif|else|endif)\b/;
320 if ($statement eq 'if') {
321 $XSS_work_idx = @XSStack;
322 push(@XSStack, {type => 'if'});
325 death ("Error: `$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");
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)} = ('', {});
339 my($tmp) = pop(@XSStack);
340 0 while (--$XSS_work_idx
341 && $XSStack[$XSS_work_idx]{type} ne 'if');
342 # Keep all new defined functions
343 push(@fns, keys %{$tmp->{other_functions}});
344 @{$XSStack[$XSS_work_idx]{functions}}{@fns} = (1) x @fns;
349 next PARAGRAPH unless @line;
351 if ($XSS_work_idx && !$XSStack[$XSS_work_idx]{varname}) {
352 # We are inside an #if, but have not yet #defined its xsubpp variable.
353 print "#define $cpp_next_tmp 1\n\n";
354 push(@InitFileCode, "#if $cpp_next_tmp\n");
355 push(@BootCode, "#if $cpp_next_tmp");
356 $XSStack[$XSS_work_idx]{varname} = $cpp_next_tmp++;
359 death ("Code is not inside a function"
360 ." (maybe last function was ended by a blank line "
361 ." followed by a statement on column one?)")
362 if $line[0] =~ /^\s/;
364 my ($class, $externC, $static, $ellipsis, $wantRETVAL, $RETVAL_no_return);
365 my (@fake_INPUT_pre); # For length(s) generated variables
368 # initialize info arrays
374 undef($self->{processing_arg_with_types});
375 undef(%argtype_seen);
379 undef($self->{proto_in_this_xsub});
380 undef($self->{scope_in_this_xsub});
381 undef($self->{interface});
382 undef($prepush_done);
383 $self->{interface_macro} = 'XSINTERFACE_FUNC';
384 $self->{interface_macro_set} = 'XSINTERFACE_FUNC_SET';
385 $self->{ProtoThisXSUB} = $self->{WantPrototypes};
386 $self->{ScopeThisXSUB} = 0;
390 while (my $kwd = check_keyword("REQUIRE|PROTOTYPES|FALLBACK|VERSIONCHECK|INCLUDE(?:_COMMAND)?|SCOPE")) {
392 &{"${kwd}_handler"}();
394 next PARAGRAPH unless @line;
398 if (check_keyword("BOOT")) {
400 push (@BootCode, "#line $line_no[@line_no - @line] \"$self->{filepathname}\"")
401 if $self->{WantLineNumbers} && $line[0] !~ /^\s*#\s*line\b/;
402 push (@BootCode, @line, "");
406 # extract return type, function name and arguments
407 ($self->{ret_type}) = tidy_type($_);
408 $RETVAL_no_return = 1 if $self->{ret_type} =~ s/^NO_OUTPUT\s+//;
410 # Allow one-line ANSI-like declaration
413 and $self->{ret_type} =~ s/^(.*?\w.*?)\s*\b(\w+\s*\(.*)/$1/s;
415 # a function definition needs at least 2 lines
416 blurt ("Error: Function definition too short '$self->{ret_type}'"), next PARAGRAPH
419 $externC = 1 if $self->{ret_type} =~ s/^extern "C"\s+//;
420 $static = 1 if $self->{ret_type} =~ s/^static\s+//;
422 $func_header = shift(@line);
423 blurt ("Error: Cannot parse function definition from '$func_header'"), next PARAGRAPH
424 unless $func_header =~ /^(?:([\w:]*)::)?(\w+)\s*\(\s*(.*?)\s*\)\s*(const)?\s*(;\s*)?$/s;
426 ($class, $func_name, $orig_args) = ($1, $2, $3);
427 $class = "$4 $class" if $4;
428 ($pname = $func_name) =~ s/^($self->{Prefix})?/$self->{Packprefix}/;
430 ($clean_func_name = $func_name) =~ s/^$self->{Prefix}//;
431 $Full_func_name = "${Packid}_$clean_func_name";
433 $Full_func_name = $SymSet->addsym($Full_func_name);
436 # Check for duplicate function definition
437 for my $tmp (@XSStack) {
438 next unless defined $tmp->{functions}{$Full_func_name};
439 Warn("Warning: duplicate function definition '$clean_func_name' detected");
442 $XSStack[$XSS_work_idx]{functions}{$Full_func_name}++;
443 %XsubAliases = %XsubAliasValues = %Interfaces = @Attributes = ();
446 $orig_args =~ s/\\\s*/ /g; # process line continuations
449 my %only_C_inlist; # Not in the signature of Perl function
450 if ($args{argtypes} and $orig_args =~ /\S/) {
451 my $args = "$orig_args ,";
452 if ($args =~ /^( (??{ $C_arg }) , )* $ /x) {
453 @args = ($args =~ /\G ( (??{ $C_arg }) ) , /xg);
457 my ($arg, $default) = ($_ =~ m/ ( [^=]* ) ( (?: = .* )? ) /x);
458 my ($pre, $len_name) = ($arg =~ /(.*?) \s*
459 \b ( \w+ | length\( \s*\w+\s* \) )
461 next unless defined($pre) && length($pre);
464 if ($args{inout} and s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\b\s*//) {
466 $out_type = $type if $type ne 'IN';
467 $arg =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\b\s*//;
468 $pre =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\b\s*//;
471 if ($len_name =~ /^length\( \s* (\w+) \s* \)\z/x) {
472 $len_name = "XSauto_length_of_$1";
474 die "Default value on length() argument: `$_'"
477 if (length $pre or $islength) { # Has a type
479 push @fake_INPUT_pre, $arg;
482 push @fake_INPUT, $arg;
484 # warn "pushing '$arg'\n";
485 $argtype_seen{$len_name}++;
486 $_ = "$len_name$default"; # Assigns to @args
488 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST" or $islength;
489 push @outlist, $len_name if $out_type =~ /OUTLIST$/;
490 $in_out{$len_name} = $out_type if $out_type;
494 @args = split(/\s*,\s*/, $orig_args);
495 Warn("Warning: cannot parse argument list '$orig_args', fallback to split");
499 @args = split(/\s*,\s*/, $orig_args);
501 if ($args{inout} and s/^(IN|IN_OUTLIST|OUTLIST|IN_OUT|OUT)\b\s*//) {
503 next if $out_type eq 'IN';
504 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST";
505 if ($out_type =~ /OUTLIST$/) {
506 push @outlist, undef;
508 $in_out{$_} = $out_type;
512 if (defined($class)) {
513 my $arg0 = ((defined($static) or $func_name eq 'new')
515 unshift(@args, $arg0);
520 my $report_args = '';
521 foreach my $i (0 .. $#args) {
522 if ($args[$i] =~ s/\.\.\.//) {
524 if ($args[$i] eq '' && $i == $#args) {
525 $report_args .= ", ...";
530 if ($only_C_inlist{$args[$i]}) {
531 push @args_num, undef;
534 push @args_num, ++$num_args;
535 $report_args .= ", $args[$i]";
537 if ($args[$i] =~ /^([^=]*[^\s=])\s*=\s*(.*)/s) {
540 $defaults{$args[$i]} = $2;
541 $defaults{$args[$i]} =~ s/"/\\"/g;
543 $proto_arg[$i+1] = '$';
545 my $min_args = $num_args - $extra_args;
546 $report_args =~ s/"/\\"/g;
547 $report_args =~ s/^,\s+//;
548 my @func_args = @args;
549 shift @func_args if defined($class);
552 s/^/&/ if $in_out{$_};
554 $self->{func_args} = join(", ", @func_args);
555 @args_match{@args} = @args_num;
557 my $PPCODE = grep(/^\s*PPCODE\s*:/, @line);
558 my $CODE = grep(/^\s*CODE\s*:/, @line);
559 # Detect CODE: blocks which use ST(n)= or XST_m*(n,v)
560 # to set explicit return values.
561 my $EXPLICIT_RETURN = ($CODE &&
562 ("@line" =~ /(\bST\s*\([^;]*=) | (\bXST_m\w+\s*\()/x ));
564 # The $ALIAS which follows is only explicitly called within the scope of
565 # process_file(). In principle, it ought to be a lexical, i.e., 'my
566 # $ALIAS' like the other nearby variables. However, implementing that
567 # change produced a slight difference in the resulting .c output in at
568 # least two distributions: B/BD/BDFOY/Crypt-Rijndael and
569 # G/GF/GFUJI/Hash-FieldHash. The difference is, arguably, an improvement
570 # in the resulting C code. Example:
572 # < GvNAME(CvGV(cv)),
574 # > "Crypt::Rijndael::encrypt",
575 # But at this point we're committed to generating the *same* C code that
576 # the current version of ParseXS.pm does. So we're declaring it as 'our'.
577 $ALIAS = grep(/^\s*ALIAS\s*:/, @line);
579 my $INTERFACE = grep(/^\s*INTERFACE\s*:/, @line);
581 $xsreturn = 1 if $EXPLICIT_RETURN;
583 $externC = $externC ? qq[extern "C"] : "";
585 # print function header
588 #XS(XS_${Full_func_name}); /* prototype to pass -Wmissing-prototypes */
589 #XS(XS_${Full_func_name})
597 print Q(<<"EOF") if $ALIAS;
600 print Q(<<"EOF") if $INTERFACE;
601 # dXSFUNCTION($self->{ret_type});
604 $self->{cond} = ($min_args ? qq(items < $min_args) : 0);
606 elsif ($min_args == $num_args) {
607 $self->{cond} = qq(items != $min_args);
610 $self->{cond} = qq(items < $min_args || items > $num_args);
613 print Q(<<"EOF") if $args{except};
621 # croak_xs_usage(cv, "$report_args");
625 # cv likely to be unused
627 # PERL_UNUSED_VAR(cv); /* -W */
631 #gcc -Wall: if an xsub has PPCODE is used
632 #it is possible none of ST, XSRETURN or XSprePUSH macros are used
633 #hence `ax' (setup by dXSARGS) is unused
634 #XXX: could breakup the dXSARGS; into dSP;dMARK;dITEMS
635 #but such a move could break third-party extensions
636 print Q(<<"EOF") if $PPCODE;
637 # PERL_UNUSED_VAR(ax); /* -Wall */
640 print Q(<<"EOF") if $PPCODE;
644 # Now do a block of some sort.
646 $self->{condnum} = 0;
647 $self->{cond} = ''; # last CASE: condidional
648 push(@line, "$END:");
649 push(@line_no, $line_no[-1]);
653 &CASE_handler if check_keyword("CASE");
658 # do initialization of input variables
659 $self->{thisdone} = 0;
660 $self->{retvaldone} = 0;
661 $self->{deferred} = "";
663 $self->{gotRETVAL} = 0;
666 process_keyword("INPUT|PREINIT|INTERFACE_MACRO|C_ARGS|ALIAS|ATTRS|PROTOTYPE|SCOPE|OVERLOAD");
668 print Q(<<"EOF") if $self->{ScopeThisXSUB};
673 if (!$self->{thisdone} && defined($class)) {
674 if (defined($static) or $func_name eq 'new') {
676 $var_types{"CLASS"} = "char *";
681 printed_name => undef,
686 $var_types{"THIS"} = "$class *";
691 printed_name => undef,
697 if (/^\s*NOT_IMPLEMENTED_YET/) {
698 print "\n\tPerl_croak(aTHX_ \"$pname: not implemented yet\");\n";
702 if ($self->{ret_type} ne "void") {
703 print "\t" . &map_type($self->{ret_type}, 'RETVAL', $self->{hiertype}) . ";\n"
704 if !$self->{retvaldone};
705 $args_match{"RETVAL"} = 0;
706 $var_types{"RETVAL"} = $self->{ret_type};
708 if $args{optimize} and $targetable{$type_kind{$self->{ret_type}}};
711 if (@fake_INPUT or @fake_INPUT_pre) {
712 unshift @line, @fake_INPUT_pre, @fake_INPUT, $_;
714 $self->{processing_arg_with_types} = 1;
717 print $self->{deferred};
719 process_keyword("INIT|ALIAS|ATTRS|PROTOTYPE|INTERFACE_MACRO|INTERFACE|C_ARGS|OVERLOAD");
721 if (check_keyword("PPCODE")) {
723 death ("PPCODE must be last thing") if @line;
724 print "\tLEAVE;\n" if $self->{ScopeThisXSUB};
725 print "\tPUTBACK;\n\treturn;\n";
727 elsif (check_keyword("CODE")) {
730 elsif (defined($class) and $func_name eq "DESTROY") {
732 print "delete THIS;\n";
736 if ($self->{ret_type} ne "void") {
740 if (defined($static)) {
741 if ($func_name eq 'new') {
742 $func_name = "$class";
748 elsif (defined($class)) {
749 if ($func_name eq 'new') {
750 $func_name .= " $class";
756 $func_name =~ s/^\Q$args{'s'}//
757 if exists $args{'s'};
758 $func_name = 'XSFUNCTION' if $self->{interface};
759 print "$func_name($self->{func_args});\n";
763 # do output variables
764 $self->{gotRETVAL} = 0; # 1 if RETVAL seen in OUTPUT section;
765 undef $self->{RETVAL_code} ; # code to set RETVAL (from OUTPUT section);
766 # $wantRETVAL set if 'RETVAL =' autogenerated
767 ($wantRETVAL, $self->{ret_type}) = (0, 'void') if $RETVAL_no_return;
769 process_keyword("POSTCALL|OUTPUT|ALIAS|ATTRS|PROTOTYPE|OVERLOAD");
772 type => $var_types{$_},
773 num => $args_match{$_},
775 do_setmagic => $DoSetMagic,
777 } ) for grep $in_out{$_} =~ /OUT$/, keys %in_out;
779 # all OUTPUT done, so now push the return value on the stack
780 if ($self->{gotRETVAL} && $self->{RETVAL_code}) {
781 print "\t$self->{RETVAL_code}\n";
783 elsif ($self->{gotRETVAL} || $wantRETVAL) {
784 my $t = $args{optimize} && $targetable{$type_kind{$self->{ret_type}}};
785 # Although the '$var' declared in the next line is never explicitly
786 # used within this 'elsif' block, commenting it out leads to
787 # disaster, starting with the first 'eval qq' inside the 'elsif' block
789 # It appears that this is related to the fact that at this point the
790 # value of $t is a reference to an array whose [2] element includes
791 # '$var' as a substring:
794 my $type = $self->{ret_type};
796 # 0: type, 1: with_size, 2: how, 3: how_size
797 if ($t and not $t->[1] and $t->[0] eq 'p') {
798 # PUSHp corresponds to setpvn. Treate setpv directly
799 my $what = eval qq("$t->[2]");
802 print "\tsv_setpv(TARG, $what); XSprePUSH; PUSHTARG;\n";
806 my $what = eval qq("$t->[2]");
810 $tsize = '' unless defined $tsize;
811 $tsize = eval qq("$tsize");
813 print "\tXSprePUSH; PUSH$t->[0]($what$tsize);\n";
817 # RETVAL almost never needs SvSETMAGIC()
819 type => $self->{ret_type},
828 $xsreturn = 1 if $self->{ret_type} ne "void";
831 print "\tXSprePUSH;" if $c and not $prepush_done;
832 print "\tEXTEND(SP,$c);\n" if $c;
835 type => $var_types{$_},
843 process_keyword("CLEANUP|ALIAS|ATTRS|PROTOTYPE|OVERLOAD");
845 print Q(<<"EOF") if $self->{ScopeThisXSUB};
848 print Q(<<"EOF") if $self->{ScopeThisXSUB} and not $PPCODE;
852 # print function trailer
856 print Q(<<"EOF") if $args{except};
859 # sprintf(errbuf, "%s: %s\\tpropagated", Xname, Xreason);
862 if (check_keyword("CASE")) {
863 blurt ("Error: No `CASE:' at top of function")
864 unless $self->{condnum};
865 $_ = "CASE: $_"; # Restore CASE: label
868 last if $_ eq "$END:";
869 death(/^$self->{BLOCK_re}/o ? "Misplaced `$1:'" : "Junk at end of function ($_)");
872 print Q(<<"EOF") if $args{except};
874 # Perl_croak(aTHX_ errbuf);
878 print Q(<<"EOF") unless $PPCODE;
879 # XSRETURN($xsreturn);
883 print Q(<<"EOF") unless $PPCODE;
896 # Build the prototype string for the xsub
897 if ($self->{ProtoThisXSUB}) {
898 $newXS = "newXSproto_portable";
900 if ($self->{ProtoThisXSUB} eq 2) {
901 # User has specified empty prototype
903 elsif ($self->{ProtoThisXSUB} eq 1) {
905 if ($min_args < $num_args) {
907 $proto_arg[$min_args] .= ";";
909 push @proto_arg, "$s\@"
912 $proto = join ("", grep defined, @proto_arg);
915 # User has specified a prototype
916 $proto = $self->{ProtoThisXSUB};
918 $proto = qq{, "$proto"};
922 $XsubAliases{$pname} = 0
923 unless defined $XsubAliases{$pname};
924 while ( my ($xname, $value) = each %XsubAliases) {
925 push(@InitFileCode, Q(<<"EOF"));
926 # cv = ${newXS}(\"$xname\", XS_$Full_func_name, file$proto);
927 # XSANY.any_i32 = $value;
931 elsif (@Attributes) {
932 push(@InitFileCode, Q(<<"EOF"));
933 # cv = ${newXS}(\"$pname\", XS_$Full_func_name, file$proto);
934 # apply_attrs_string("$Package", cv, "@Attributes", 0);
937 elsif ($self->{interface}) {
938 while ( my ($yname, $value) = each %Interfaces) {
939 $yname = "$Package\::$yname" unless $yname =~ /::/;
940 push(@InitFileCode, Q(<<"EOF"));
941 # cv = ${newXS}(\"$yname\", XS_$Full_func_name, file$proto);
942 # $self->{interface_macro_set}(cv,$value);
946 elsif($newXS eq 'newXS'){ # work around P5NCI's empty newXS macro
948 " ${newXS}(\"$pname\", XS_$Full_func_name, file$proto);\n");
952 " (void)${newXS}(\"$pname\", XS_$Full_func_name, file$proto);\n");
954 } # END 'PARAGRAPH' 'while' loop
956 if ($self->{Overload}) { # make it findable with fetchmethod
958 #XS(XS_${Packid}_nil); /* prototype to pass -Wmissing-prototypes */
959 #XS(XS_${Packid}_nil)
966 unshift(@InitFileCode, <<"MAKE_FETCHMETHOD_WORK");
967 /* Making a sub named "${Package}::()" allows the package */
968 /* to be findable via fetchmethod(), and causes */
969 /* overload::Overloaded("${Package}") to return true. */
970 (void)${newXS}("${Package}::()", XS_${Packid}_nil, file$proto);
971 MAKE_FETCHMETHOD_WORK
974 # print initialization routine
983 #XS(boot_$Module_cname); /* prototype to pass -Wmissing-prototypes */
984 #XS(boot_$Module_cname)
996 #Under 5.8.x and lower, newXS is declared in proto.h as expecting a non-const
997 #file name argument. If the wrong qualifier is used, it causes breakage with
998 #C++ compilers and warnings with recent gcc.
999 #-Wall: if there is no $Full_func_name there are no xsubs in this .xs
1000 #so `file' is unused
1001 print Q(<<"EOF") if $Full_func_name;
1002 ##if (PERL_REVISION == 5 && PERL_VERSION < 9)
1003 # char* file = __FILE__;
1005 # const char* file = __FILE__;
1012 # PERL_UNUSED_VAR(cv); /* -W */
1013 # PERL_UNUSED_VAR(items); /* -W */
1016 print Q(<<"EOF") if $self->{WantVersionChk};
1017 # XS_VERSION_BOOTCHECK;
1021 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces;
1027 print Q(<<"EOF") if ($self->{Overload});
1028 # /* register the overloading (type 'A') magic */
1029 # PL_amagic_generation++;
1030 # /* The magic for overload gets a GV* via gv_fetchmeth as */
1031 # /* mentioned above, and looks in the SV* slot of it for */
1032 # /* the "fallback" status. */
1034 # get_sv( "${Package}::()", TRUE ),
1039 print @InitFileCode;
1041 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces;
1046 print "\n /* Initialisation Section */\n\n";
1049 print "\n /* End of Initialisation Section */\n\n";
1053 ##if (PERL_REVISION == 5 && PERL_VERSION >= 9)
1054 # if (PL_unitcheckav)
1055 # call_list(PL_scopestack_ix, PL_unitcheckav);
1065 warn("Please specify prototyping behavior for $self->{filename} (see perlxs manual)\n")
1066 unless $self->{ProtoUsed};
1070 untie *PSEUDO_STDOUT if tied *PSEUDO_STDOUT;
1076 sub report_error_count { $self->{errors} }
1078 # Input: ($_, @line) == unparsed input.
1079 # Output: ($_, @line) == (rest of line, following lines).
1080 # Return: the matched keyword if found, otherwise 0
1082 $_ = shift(@line) while !/\S/ && @line;
1083 s/^(\s*)($_[0])\s*:\s*(?:#.*)?/$1/s && $2;
1087 # the "do" is required for right semantics
1088 do { $_ = shift(@line) } while !/\S/ && @line;
1090 print("#line ", $line_no[@line_no - @line -1], " \"$self->{filepathname}\"\n")
1091 if $self->{WantLineNumbers} && !/^\s*#\s*line\b/ && !/^#if XSubPPtmp/;
1092 for (; defined($_) && !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1095 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $self->{WantLineNumbers};
1101 while (!/\S/ && @line) {
1105 for (; defined($_) && !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1112 sub process_keyword($) {
1117 &{"${kwd}_handler"}()
1118 while $kwd = check_keyword($pattern);
1123 blurt ("Error: `CASE:' after unconditional `CASE:'")
1124 if $self->{condnum} && $self->{cond} eq '';
1126 trim_whitespace($self->{cond});
1127 print " ", ($self->{condnum}++ ? " else" : ""), ($self->{cond} ? " if ($self->{cond})\n" : "\n");
1132 for (; !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1133 last if /^\s*NOT_IMPLEMENTED_YET/;
1134 next unless /\S/; # skip blank lines
1136 trim_whitespace($_);
1139 # remove trailing semicolon if no initialisation
1140 s/\s*;$//g unless /[=;+].*\S/;
1142 # Process the length(foo) declarations
1143 if (s/^([^=]*)\blength\(\s*(\w+)\s*\)\s*$/$1 XSauto_length_of_$2=NO_INIT/x) {
1144 print "\tSTRLEN\tSTRLEN_length_of_$2;\n";
1145 $lengthof{$2} = undef;
1146 $self->{deferred} .= "\n\tXSauto_length_of_$2 = STRLEN_length_of_$2;\n";
1149 # check for optional initialisation code
1151 $var_init = $1 if s/\s*([=;+].*)$//s;
1152 $var_init =~ s/"/\\"/g;
1155 my ($var_type, $var_addr, $var_name) = /^(.*?[^&\s])\s*(\&?)\s*\b(\w+)$/s
1156 or blurt("Error: invalid argument declaration '$ln'"), next;
1158 # Check for duplicate definitions
1159 blurt ("Error: duplicate definition of argument '$var_name' ignored"), next
1160 if $arg_list{$var_name}++
1161 or defined $argtype_seen{$var_name} and not $self->{processing_arg_with_types};
1163 $self->{thisdone} |= $var_name eq "THIS";
1164 $self->{retvaldone} |= $var_name eq "RETVAL";
1165 $var_types{$var_name} = $var_type;
1166 # XXXX This check is a safeguard against the unfinished conversion of
1167 # generate_init(). When generate_init() is fixed,
1168 # one can use 2-args map_type() unconditionally.
1170 if ($var_type =~ / \( \s* \* \s* \) /x) {
1171 # Function pointers are not yet supported with &output_init!
1172 print "\t" . &map_type($var_type, $var_name, $self->{hiertype});
1176 print "\t" . &map_type($var_type, undef, $self->{hiertype});
1179 $var_num = $args_match{$var_name};
1182 $proto_arg[$var_num] = $proto_letter{$var_type} || "\$";
1184 $self->{func_args} =~ s/\b($var_name)\b/&$1/ if $var_addr;
1185 if ($var_init =~ /^[=;]\s*NO_INIT\s*;?\s*$/
1186 or $in_out{$var_name} and $in_out{$var_name} =~ /^OUT/
1187 and $var_init !~ /\S/) {
1188 if ($printed_name) {
1192 print "\t$var_name;\n";
1195 elsif ($var_init =~ /\S/) {
1201 printed_name => $printed_name,
1209 printed_name => $printed_name,
1218 sub OUTPUT_handler {
1219 for (; !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1221 if (/^\s*SETMAGIC\s*:\s*(ENABLE|DISABLE)\s*/) {
1222 $DoSetMagic = ($1 eq "ENABLE" ? 1 : 0);
1225 my ($outarg, $outcode) = /^\s*(\S+)\s*(.*?)\s*$/s;
1226 blurt ("Error: duplicate OUTPUT argument '$outarg' ignored"), next
1227 if $outargs{$outarg}++;
1228 if (!$self->{gotRETVAL} and $outarg eq 'RETVAL') {
1229 # deal with RETVAL last
1230 $self->{RETVAL_code} = $outcode;
1231 $self->{gotRETVAL} = 1;
1234 blurt ("Error: OUTPUT $outarg not an argument"), next
1235 unless defined($args_match{$outarg});
1236 blurt("Error: No input definition for OUTPUT argument '$outarg' - ignored"), next
1237 unless defined $var_types{$outarg};
1238 $var_num = $args_match{$outarg};
1240 print "\t$outcode\n";
1241 print "\tSvSETMAGIC(ST(" , $var_num-1 , "));\n" if $DoSetMagic;
1245 type => $var_types{$outarg},
1248 do_setmagic => $DoSetMagic,
1252 delete $in_out{$outarg} # No need to auto-OUTPUT
1253 if exists $in_out{$outarg} and $in_out{$outarg} =~ /OUT$/;
1257 sub C_ARGS_handler() {
1258 my $in = merge_section();
1260 trim_whitespace($in);
1261 $self->{func_args} = $in;
1264 sub INTERFACE_MACRO_handler() {
1265 my $in = merge_section();
1267 trim_whitespace($in);
1268 if ($in =~ /\s/) { # two
1269 ($self->{interface_macro}, $self->{interface_macro_set}) = split ' ', $in;
1272 $self->{interface_macro} = $in;
1273 $self->{interface_macro_set} = 'UNKNOWN_CVT'; # catch later
1275 $self->{interface} = 1; # local
1276 $Interfaces = 1; # global
1279 sub INTERFACE_handler() {
1280 my $in = merge_section();
1282 trim_whitespace($in);
1284 foreach (split /[\s,]+/, $in) {
1285 my $iface_name = $_;
1286 $iface_name =~ s/^$self->{Prefix}//;
1287 $Interfaces{$iface_name} = $_;
1290 # XSFUNCTION = $self->{interface_macro}($self->{ret_type},cv,XSANY.any_dptr);
1292 $self->{interface} = 1; # local
1293 $Interfaces = 1; # global
1296 sub CLEANUP_handler() { print_section() }
1297 sub PREINIT_handler() { print_section() }
1298 sub POSTCALL_handler() { print_section() }
1299 sub INIT_handler() { print_section() }
1305 # Parse alias definitions
1307 # alias = value alias = value ...
1309 while ($line =~ s/^\s*([\w:]+)\s*=\s*(\w+)\s*//) {
1310 my ($alias, $value) = ($1, $2);
1311 my $orig_alias = $alias;
1313 # check for optional package definition in the alias
1314 $alias = $self->{Packprefix} . $alias if $alias !~ /::/;
1316 # check for duplicate alias name & duplicate value
1317 Warn("Warning: Ignoring duplicate alias '$orig_alias'")
1318 if defined $XsubAliases{$alias};
1320 Warn("Warning: Aliases '$orig_alias' and '$XsubAliasValues{$value}' have identical values")
1321 if $XsubAliasValues{$value};
1324 $XsubAliases{$alias} = $value;
1325 $XsubAliasValues{$value} = $orig_alias;
1328 blurt("Error: Cannot parse ALIAS definitions from '$orig'")
1332 sub ATTRS_handler () {
1333 for (; !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1335 trim_whitespace($_);
1336 push @Attributes, $_;
1340 sub ALIAS_handler () {
1341 for (; !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1343 trim_whitespace($_);
1344 GetAliases($_) if $_;
1348 sub OVERLOAD_handler() {
1349 for (; !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1351 trim_whitespace($_);
1352 while ( s/^\s*([\w:"\\)\+\-\*\/\%\<\>\.\&\|\^\!\~\{\}\=]+)\s*//) {
1353 $self->{Overload} = 1 unless $self->{Overload};
1354 my $overload = "$Package\::(".$1;
1356 " (void)${newXS}(\"$overload\", XS_$Full_func_name, file$proto);\n");
1361 sub FALLBACK_handler() {
1362 # the rest of the current line should contain either TRUE,
1365 trim_whitespace($_);
1367 TRUE => "&PL_sv_yes", 1 => "&PL_sv_yes",
1368 FALSE => "&PL_sv_no", 0 => "&PL_sv_no",
1369 UNDEF => "&PL_sv_undef",
1372 # check for valid FALLBACK value
1373 death ("Error: FALLBACK: TRUE/FALSE/UNDEF") unless exists $map{uc $_};
1375 $self->{Fallback} = $map{uc $_};
1379 sub REQUIRE_handler () {
1380 # the rest of the current line should contain a version number
1383 trim_whitespace($Ver);
1385 death ("Error: REQUIRE expects a version number")
1388 # check that the version number is of the form n.n
1389 death ("Error: REQUIRE: expected a number, got '$Ver'")
1390 unless $Ver =~ /^\d+(\.\d*)?/;
1392 death ("Error: xsubpp $Ver (or better) required--this is only $VERSION.")
1393 unless $VERSION >= $Ver;
1396 sub VERSIONCHECK_handler () {
1397 # the rest of the current line should contain either ENABLE or
1400 trim_whitespace($_);
1402 # check for ENABLE/DISABLE
1403 death ("Error: VERSIONCHECK: ENABLE/DISABLE")
1404 unless /^(ENABLE|DISABLE)/i;
1406 $self->{WantVersionChk} = 1 if $1 eq 'ENABLE';
1407 $self->{WantVersionChk} = 0 if $1 eq 'DISABLE';
1411 sub PROTOTYPE_handler () {
1414 death("Error: Only 1 PROTOTYPE definition allowed per xsub")
1415 if $self->{proto_in_this_xsub}++;
1417 for (; !/^$self->{BLOCK_re}/o; $_ = shift(@line)) {
1420 trim_whitespace($_);
1421 if ($_ eq 'DISABLE') {
1422 $self->{ProtoThisXSUB} = 0;
1424 elsif ($_ eq 'ENABLE') {
1425 $self->{ProtoThisXSUB} = 1;
1428 # remove any whitespace
1430 death("Error: Invalid prototype '$_'")
1431 unless valid_proto_string($_);
1432 $self->{ProtoThisXSUB} = C_string($_);
1436 # If no prototype specified, then assume empty prototype ""
1437 $self->{ProtoThisXSUB} = 2 unless $specified;
1439 $self->{ProtoUsed} = 1;
1442 sub SCOPE_handler () {
1443 death("Error: Only 1 SCOPE declaration allowed per xsub")
1444 if $self->{scope_in_this_xsub}++;
1446 trim_whitespace($_);
1447 death ("Error: SCOPE: ENABLE/DISABLE")
1448 unless /^(ENABLE|DISABLE)\b/i;
1449 $self->{ScopeThisXSUB} = ( uc($1) eq 'ENABLE' );
1452 sub PROTOTYPES_handler () {
1453 # the rest of the current line should contain either ENABLE or
1456 trim_whitespace($_);
1458 # check for ENABLE/DISABLE
1459 death ("Error: PROTOTYPES: ENABLE/DISABLE")
1460 unless /^(ENABLE|DISABLE)/i;
1462 $self->{WantPrototypes} = 1 if $1 eq 'ENABLE';
1463 $self->{WantPrototypes} = 0 if $1 eq 'DISABLE';
1464 $self->{ProtoUsed} = 1;
1470 # Save the current file context.
1473 LastLine => $self->{lastline},
1474 LastLineNo => $self->{lastline_no},
1476 LineNo => \@line_no,
1477 Filename => $self->{filename},
1478 Filepathname => $self->{filepathname},
1480 IsPipe => scalar($self->{filename} =~ /\|\s*$/),
1486 sub INCLUDE_handler () {
1487 # the rest of the current line should contain a valid filename
1489 trim_whitespace($_);
1491 death("INCLUDE: filename missing")
1494 death("INCLUDE: output pipe is illegal")
1497 # simple minded recursion detector
1498 death("INCLUDE loop detected")
1499 if $IncludedFiles{$_};
1501 ++$IncludedFiles{$_} unless /\|\s*$/;
1503 if (/\|\s*$/ && /^\s*perl\s/) {
1504 Warn("The INCLUDE directive with a command is discouraged." .
1505 " Use INCLUDE_COMMAND instead! In particular using 'perl'" .
1506 " in an 'INCLUDE: ... |' directive is not guaranteed to pick" .
1507 " up the correct perl. The INCLUDE_COMMAND directive allows" .
1508 " the use of \$^X as the currently running perl, see" .
1509 " 'perldoc perlxs' for details.");
1514 $FH = Symbol::gensym();
1517 open ($FH, "$_") or death("Cannot open '$_': $!");
1521 #/* INCLUDE: Including '$_' from '$self->{filename}' */
1525 $self->{filename} = $_;
1526 $self->{filepathname} = File::Spec->catfile($self->{dir}, $self->{filename});
1528 # Prime the pump by reading the first
1531 # skip leading blank lines
1533 last unless /^\s*$/;
1536 $self->{lastline} = $_;
1537 $self->{lastline_no} = $.;
1542 my @args = split /\s+/, $cmd;
1545 $_ = q(").$_.q(") if !/^\"/ && length($_) > 0;
1547 return join (' ', ($cmd, @args));
1550 sub INCLUDE_COMMAND_handler () {
1551 # the rest of the current line should contain a valid command
1553 trim_whitespace($_);
1555 $_ = QuoteArgs($_) if $^O eq 'VMS';
1557 death("INCLUDE_COMMAND: command missing")
1560 death("INCLUDE_COMMAND: pipes are illegal")
1561 if /^\s*\|/ or /\|\s*$/;
1563 PushXSStack( IsPipe => 1 );
1565 $FH = Symbol::gensym();
1567 # If $^X is used in INCLUDE_COMMAND, we know it's supposed to be
1568 # the same perl interpreter as we're currently running
1572 open ($FH, "-|", "$_")
1573 or death("Cannot run command '$_' to include its output: $!");
1577 #/* INCLUDE_COMMAND: Including output of '$_' from '$self->{filename}' */
1581 $self->{filename} = $_;
1582 $self->{filepathname} = $self->{filename};
1583 $self->{filepathname} =~ s/\"/\\"/g;
1585 # Prime the pump by reading the first
1588 # skip leading blank lines
1590 last unless /^\s*$/;
1593 $self->{lastline} = $_;
1594 $self->{lastline_no} = $.;
1598 return 0 unless $XSStack[-1]{type} eq 'file';
1600 my $data = pop @XSStack;
1601 my $ThisFile = $self->{filename};
1602 my $isPipe = $data->{IsPipe};
1604 --$IncludedFiles{$self->{filename}}
1609 $FH = $data->{Handle};
1610 # $filename is the leafname, which for some reason isused for diagnostic
1611 # messages, whereas $filepathname is the full pathname, and is used for
1613 $self->{filename} = $data->{Filename};
1614 $self->{filepathname} = $data->{Filepathname};
1615 $self->{lastline} = $data->{LastLine};
1616 $self->{lastline_no} = $data->{LastLineNo};
1617 @line = @{ $data->{Line} };
1618 @line_no = @{ $data->{LineNo} };
1620 if ($isPipe and $? ) {
1621 --$self->{lastline_no};
1622 print STDERR "Error reading from pipe '$ThisFile': $! in $self->{filename}, line $self->{lastline_no}\n" ;
1628 #/* INCLUDE: Returning to '$self->{filename}' from '$ThisFile' */
1636 my @cpp = grep(/^\#\s*(?:if|e\w+)/, @line);
1638 my ($cpp, $cpplevel);
1640 if ($cpp =~ /^\#\s*if/) {
1643 elsif (!$cpplevel) {
1644 Warn("Warning: #else/elif/endif without #if in this function");
1645 print STDERR " (precede it with a blank line if the matching #if is outside the function)\n"
1646 if $XSStack[-1]{type} eq 'if';
1649 elsif ($cpp =~ /^\#\s*endif/) {
1653 Warn("Warning: #if without #endif in this function") if $cpplevel;
1661 $text =~ s/\[\[/{/g;
1662 $text =~ s/\]\]/}/g;
1666 # Read next xsub into @line from ($lastline, <$FH>).
1669 death ("Error: Unterminated `#if/#ifdef/#ifndef'")
1670 if !defined $self->{lastline} && $XSStack[-1]{type} eq 'if';
1673 return PopFile() if !defined $self->{lastline};
1675 if ($self->{lastline} =~
1676 /^MODULE\s*=\s*([\w:]+)(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/) {
1678 $Package = defined($2) ? $2 : ''; # keep -w happy
1679 $self->{Prefix} = defined($3) ? $3 : ''; # keep -w happy
1680 $self->{Prefix} = quotemeta $self->{Prefix};
1681 ($Module_cname = $Module) =~ s/\W/_/g;
1682 ($Packid = $Package) =~ tr/:/_/;
1683 $self->{Packprefix} = $Package;
1684 $self->{Packprefix} .= "::" if $self->{Packprefix} ne "";
1685 $self->{lastline} = "";
1689 # Skip embedded PODs
1690 while ($self->{lastline} =~ /^=/) {
1691 while ($self->{lastline} = <$FH>) {
1692 last if ($self->{lastline} =~ /^=cut\s*$/);
1694 death ("Error: Unterminated pod") unless $self->{lastline};
1695 $self->{lastline} = <$FH>;
1696 chomp $self->{lastline};
1697 $self->{lastline} =~ s/^\s+$//;
1699 if ($self->{lastline} !~ /^\s*#/ ||
1701 # ANSI: if ifdef ifndef elif else endif define undef
1703 # gcc: warning include_next
1705 # others: ident (gcc notes that some cpps have this one)
1706 $self->{lastline} =~ /^#[ \t]*(?:(?:if|ifn?def|elif|else|endif|define|undef|pragma|error|warning|line\s+\d+|ident)\b|(?:include(?:_next)?|import)\s*["<].*[>"])/) {
1707 last if $self->{lastline} =~ /^\S/ && @line && $line[-1] eq "";
1708 push(@line, $self->{lastline});
1709 push(@line_no, $self->{lastline_no});
1712 # Read next line and continuation lines
1713 last unless defined($self->{lastline} = <$FH>);
1714 $self->{lastline_no} = $.;
1716 $self->{lastline} .= $tmp_line
1717 while ($self->{lastline} =~ /\\$/ && defined($tmp_line = <$FH>));
1719 chomp $self->{lastline};
1720 $self->{lastline} =~ s/^\s+$//;
1722 pop(@line), pop(@line_no) while @line && $line[-1] eq "";
1727 my $argsref = shift;
1728 my ($type, $num, $var, $init, $printed_name) = (
1733 $argsref->{printed_name}
1735 my $arg = "ST(" . ($num - 1) . ")";
1737 if ( $init =~ /^=/ ) {
1738 if ($printed_name) {
1739 eval qq/print " $init\\n"/;
1742 eval qq/print "\\t$var $init\\n"/;
1747 if ( $init =~ s/^\+// && $num ) {
1752 printed_name => $printed_name,
1755 elsif ($printed_name) {
1760 eval qq/print "\\t$var;\\n"/;
1764 $self->{deferred} .= eval qq/"\\n\\t$init\\n"/;
1770 my $argsref = shift;
1771 my ($type, $num, $var, $printed_name) = (
1775 $argsref->{printed_name},
1777 my $arg = "ST(" . ($num - 1) . ")";
1778 my ($argoff, $ntype, $tk);
1781 $type = tidy_type($type);
1782 blurt("Error: '$type' not in typemap"), return
1783 unless defined($type_kind{$type});
1785 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1787 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1788 $tk = $type_kind{$type};
1789 $tk =~ s/OBJ$/REF/ if $func_name =~ /DESTROY$/;
1790 if ($tk eq 'T_PV' and exists $lengthof{$var}) {
1791 print "\t$var" unless $printed_name;
1792 print " = ($type)SvPV($arg, STRLEN_length_of_$var);\n";
1793 die "default value not supported with length(NAME) supplied"
1794 if defined $defaults{$var};
1797 $type =~ tr/:/_/ unless $self->{hiertype};
1798 blurt("Error: No INPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1799 unless defined $input_expr{$tk};
1800 my $expr = $input_expr{$tk};
1801 if ($expr =~ /DO_ARRAY_ELEM/) {
1802 blurt("Error: '$subtype' not in typemap"), return
1803 unless defined($type_kind{$subtype});
1804 blurt("Error: No INPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1805 unless defined $input_expr{$type_kind{$subtype}};
1806 my $subexpr = $input_expr{$type_kind{$subtype}};
1807 $subexpr =~ s/\$type/\$subtype/g;
1808 $subexpr =~ s/ntype/subtype/g;
1809 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1810 $subexpr =~ s/\n\t/\n\t\t/g;
1811 $subexpr =~ s/is not of (.*\")/[arg %d] is not of $1, ix_$var + 1/g;
1812 $subexpr =~ s/\$var/${var}[ix_$var - $argoff]/;
1813 $expr =~ s/DO_ARRAY_ELEM/$subexpr/;
1815 if ($expr =~ m#/\*.*scope.*\*/#i) { # "scope" in C comments
1816 $self->{ScopeThisXSUB} = 1;
1818 if (defined($defaults{$var})) {
1819 $expr =~ s/(\t+)/$1 /g;
1821 if ($printed_name) {
1825 eval qq/print "\\t$var;\\n"/;
1828 if ($defaults{$var} eq 'NO_INIT') {
1829 $self->{deferred} .= eval qq/"\\n\\tif (items >= $num) {\\n$expr;\\n\\t}\\n"/;
1832 $self->{deferred} .= eval qq/"\\n\\tif (items < $num)\\n\\t $var = $defaults{$var};\\n\\telse {\\n$expr;\\n\\t}\\n"/;
1836 elsif ($self->{ScopeThisXSUB} or $expr !~ /^\s*\$var =/) {
1837 if ($printed_name) {
1841 eval qq/print "\\t$var;\\n"/;
1844 $self->{deferred} .= eval qq/"\\n$expr;\\n"/;
1848 die "panic: do not know how to handle this branch for function pointers"
1850 eval qq/print "$expr;\\n"/;
1855 sub generate_output {
1856 my $argsref = shift;
1857 my ($type, $num, $var, $do_setmagic, $do_push) = (
1861 $argsref->{do_setmagic},
1864 my $arg = "ST(" . ($num - ($num != 0)) . ")";
1867 $type = tidy_type($type);
1868 if ($type =~ /^array\(([^,]*),(.*)\)/) {
1869 print "\t$arg = sv_newmortal();\n";
1870 print "\tsv_setpvn($arg, (char *)$var, $2 * sizeof($1));\n";
1871 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1874 blurt("Error: '$type' not in typemap"), return
1875 unless defined($type_kind{$type});
1876 blurt("Error: No OUTPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1877 unless defined $output_expr{$type_kind{$type}};
1878 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1879 $ntype =~ s/\(\)//g;
1881 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1882 my $expr = $output_expr{$type_kind{$type}};
1883 if ($expr =~ /DO_ARRAY_ELEM/) {
1884 blurt("Error: '$subtype' not in typemap"), return
1885 unless defined($type_kind{$subtype});
1886 blurt("Error: No OUTPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1887 unless defined $output_expr{$type_kind{$subtype}};
1888 my $subexpr = $output_expr{$type_kind{$subtype}};
1889 $subexpr =~ s/ntype/subtype/g;
1890 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1891 $subexpr =~ s/\$var/${var}[ix_$var]/g;
1892 $subexpr =~ s/\n\t/\n\t\t/g;
1893 $expr =~ s/DO_ARRAY_ELEM\n/$subexpr/;
1894 eval "print qq\a$expr\a";
1896 print "\t\tSvSETMAGIC(ST(ix_$var));\n" if $do_setmagic;
1898 elsif ($var eq 'RETVAL') {
1899 if ($expr =~ /^\t\$arg = new/) {
1900 # We expect that $arg has refcnt 1, so we need to
1902 eval "print qq\a$expr\a";
1904 print "\tsv_2mortal(ST($num));\n";
1905 print "\tSvSETMAGIC(ST($num));\n" if $do_setmagic;
1907 elsif ($expr =~ /^\s*\$arg\s*=/) {
1908 # We expect that $arg has refcnt >=1, so we need
1910 eval "print qq\a$expr\a";
1912 print "\tsv_2mortal(ST(0));\n";
1913 print "\tSvSETMAGIC(ST(0));\n" if $do_setmagic;
1916 # Just hope that the entry would safely write it
1917 # over an already mortalized value. By
1918 # coincidence, something like $arg = &sv_undef
1920 print "\tST(0) = sv_newmortal();\n";
1921 eval "print qq\a$expr\a";
1923 # new mortals don't have set magic
1927 print "\tPUSHs(sv_newmortal());\n";
1929 eval "print qq\a$expr\a";
1931 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1933 elsif ($arg =~ /^ST\(\d+\)$/) {
1934 eval "print qq\a$expr\a";
1936 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1942 # work out the line number
1943 my $warn_line_number = $line_no[@line_no - @line -1];
1945 print STDERR "@_ in $self->{filename}, line $warn_line_number\n";