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Silence new warning grep in void context warning in various modules and test files...
[perl5.git] / lib / ExtUtils / ParseXS.pm
CommitLineData
6b09c160
YST		 1package ExtUtils::ParseXS;
2
3use 5.006; # We use /??{}/ in regexes
4use Cwd;
5use Config;
6use File::Basename;
7use File::Spec;
907ce46c 8use Symbol;
6b09c160
YST		 9
10require Exporter;
11
12@ISA = qw(Exporter);
13@EXPORT_OK = qw(process_file);
14
15# use strict; # One of these days...
16
17my(@XSStack); # Stack of conditionals and INCLUDEs
18my($XSS_work_idx, $cpp_next_tmp);
19
20use vars qw($VERSION);
a396bf53 21$VERSION = '2.18_02';
6b09c160
YST		 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 $args{prototypes};
43
44 # Set defaults.
45 %args = (
46 # 'C++' => 0, # Doesn't seem to *do* anything...
47 hiertype => 0,
48 except => 0,
49 prototypes => 0,
50 versioncheck => 1,
51 linenumbers => 1,
52 optimize => 1,
53 prototypes => 0,
54 inout => 1,
55 argtypes => 1,
56 typemap => [],
57 output => \*STDOUT,
008fb49c 58 csuffix => '.c',
6b09c160
YST		 59 %args,
60 );
61
62 # Global Constants
63
64 my ($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 = ();
907ce46c 75 $FH = Symbol::gensym();
6b09c160
YST		 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 = $args{csuffix};
6b09c160
YST		 123
124 if ($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
YST		 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
fa81e4d3
NC		 196 foreach my $value (values %input_expr) {
197 $value =~ s/;*\s+\z//;
a396bf53
NC		 198 # Move C pre-processor instructions to column 1 to be strictly ANSI
199 # conformant. Some pre-processors are fussy about this.
200 $value =~ s/^\s+#/#/mg;
201 }
202 foreach my $value (values %output_expr) {
203 # And again.
204 $value =~ s/^\s+#/#/mg;
6b09c160
YST		 205 }
206
a8adbc99
RGS		 207 my ($cast, $size);
208 our $bal = qr[(?:(?>[^()]+)|\((??{ $bal })\))*]; # ()-balanced
6b09c160
YST		 209 $cast = qr[(?:\(\s*SV\s*\*\s*\)\s*)?]; # Optional (SV*) cast
210 $size = qr[,\s* (??{ $bal }) ]x; # Third arg (to setpvn)
211
212 foreach my $key (keys %output_expr) {
89345840 213 BEGIN { $^H |= 0x00200000 }; # Equivalent to: use re 'eval', but hardcoded so we can compile re.xs
6b09c160
YST		 214
215 my ($t, $with_size, $arg, $sarg) =
216 ($output_expr{$key} =~
217 m[^ \s+ sv_set ( [iunp] ) v (n)? # Type, is_setpvn
218 \s* \( \s* $cast \$arg \s* ,
219 \s* ( (??{ $bal }) ) # Set from
220 ( (??{ $size }) )? # Possible sizeof set-from
221 \) \s* ; \s* $
222 ]x);
223 $targetable{$key} = [$t, $with_size, $arg, $sarg] if $t;
224 }
225
226 my $END = "!End!\n\n"; # "impossible" keyword (multiple newline)
227
228 # Match an XS keyword
229 $BLOCK_re= '\s*(' . join('|', qw(
230 REQUIRE BOOT CASE PREINIT INPUT INIT CODE PPCODE OUTPUT
231 CLEANUP ALIAS ATTRS PROTOTYPES PROTOTYPE VERSIONCHECK INCLUDE
232 SCOPE INTERFACE INTERFACE_MACRO C_ARGS POSTCALL OVERLOAD FALLBACK
233 )) . "|$END)\\s*:";
234
235
a8adbc99 236 our ($C_group_rex, $C_arg);
6b09c160
YST		 237 # Group in C (no support for comments or literals)
238 $C_group_rex = qr/ [({\[]
239 (?: (?> [^()\[\]{}]+ ) | (??{ $C_group_rex }) )*
240 [)}\]] /x ;
241 # Chunk in C without comma at toplevel (no comments):
242 $C_arg = qr/ (?: (?> [^()\[\]{},"']+ )
243 | (??{ $C_group_rex })
244 | " (?: (?> [^\\"]+ )
245 | \\.
246 )* " # String literal
247 | ' (?: (?> [^\\']+ ) | \\. )* ' # Char literal
248 )* /xs;
249
250 # Identify the version of xsubpp used
251 print <<EOM ;
252/*
253 * This file was generated automatically by ExtUtils::ParseXS version $VERSION from the
254 * contents of $filename. Do not edit this file, edit $filename instead.
255 *
256 * ANY CHANGES MADE HERE WILL BE LOST!
257 *
258 */
259
260EOM
261
262
263 print("#line 1 \"$filepathname\"\n")
264 if $WantLineNumbers;
265
266 firstmodule:
267 while (<$FH>) {
268 if (/^=/) {
269 my $podstartline = $.;
270 do {
271 if (/^=cut\s*$/) {
272 # We can't just write out a /* */ comment, as our embedded
273 # POD might itself be in a comment. We can't put a /**/
274 # comment inside #if 0, as the C standard says that the source
275 # file is decomposed into preprocessing characters in the stage
276 # before preprocessing commands are executed.
277 # I don't want to leave the text as barewords, because the spec
278 # isn't clear whether macros are expanded before or after
279 # preprocessing commands are executed, and someone pathological
280 # may just have defined one of the 3 words as a macro that does
281 # something strange. Multiline strings are illegal in C, so
282 # the "" we write must be a string literal. And they aren't
283 # concatenated until 2 steps later, so we are safe.
284 # - Nicholas Clark
285 print("#if 0\n \"Skipped embedded POD.\"\n#endif\n");
286 printf("#line %d \"$filepathname\"\n", $. + 1)
287 if $WantLineNumbers;
288 next firstmodule
289 }
290
291 } while (<$FH>);
292 # At this point $. is at end of file so die won't state the start
293 # of the problem, and as we haven't yet read any lines &death won't
294 # show the correct line in the message either.
295 die ("Error: Unterminated pod in $filename, line $podstartline\n")
296 unless $lastline;
297 }
298 last if ($Package, $Prefix) =
299 /^MODULE\s*=\s*[\w:]+(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/;
300
301 print $_;
302 }
303 unless (defined $_) {
304 warn "Didn't find a 'MODULE ... PACKAGE ... PREFIX' line\n";
305 exit 0; # Not a fatal error for the caller process
306 }
307
308 print <<"EOF";
309#ifndef PERL_UNUSED_VAR
310# define PERL_UNUSED_VAR(var) if (0) var = var
311#endif
312
313EOF
314
315 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $WantLineNumbers;
316
317 $lastline = $_;
318 $lastline_no = $.;
319
320 PARAGRAPH:
321 while (fetch_para()) {
322 # Print initial preprocessor statements and blank lines
323 while (@line && $line[0] !~ /^[^\#]/) {
324 my $line = shift(@line);
325 print $line, "\n";
326 next unless $line =~ /^\#\s*((if)(?:n?def)?|elsif|else|endif)\b/;
327 my $statement = $+;
328 if ($statement eq 'if') {
329 $XSS_work_idx = @XSStack;
330 push(@XSStack, {type => 'if'});
331 } else {
332 death ("Error: `$statement' with no matching `if'")
333 if $XSStack[-1]{type} ne 'if';
334 if ($XSStack[-1]{varname}) {
335 push(@InitFileCode, "#endif\n");
336 push(@BootCode, "#endif");
337 }
338
339 my(@fns) = keys %{$XSStack[-1]{functions}};
340 if ($statement ne 'endif') {
341 # Hide the functions defined in other #if branches, and reset.
342 @{$XSStack[-1]{other_functions}}{@fns} = (1) x @fns;
343 @{$XSStack[-1]}{qw(varname functions)} = ('', {});
344 } else {
345 my($tmp) = pop(@XSStack);
346 0 while (--$XSS_work_idx
347 && $XSStack[$XSS_work_idx]{type} ne 'if');
348 # Keep all new defined functions
349 push(@fns, keys %{$tmp->{other_functions}});
350 @{$XSStack[$XSS_work_idx]{functions}}{@fns} = (1) x @fns;
351 }
352 }
353 }
354
355 next PARAGRAPH unless @line;
356
357 if ($XSS_work_idx && !$XSStack[$XSS_work_idx]{varname}) {
358 # We are inside an #if, but have not yet #defined its xsubpp variable.
359 print "#define $cpp_next_tmp 1\n\n";
360 push(@InitFileCode, "#if $cpp_next_tmp\n");
361 push(@BootCode, "#if $cpp_next_tmp");
362 $XSStack[$XSS_work_idx]{varname} = $cpp_next_tmp++;
363 }
364
365 death ("Code is not inside a function"
366 ." (maybe last function was ended by a blank line "
367 ." followed by a statement on column one?)")
368 if $line[0] =~ /^\s/;
369
95b611b0 370 my ($class, $externC, $static, $ellipsis, $wantRETVAL, $RETVAL_no_return);
6b09c160
YST		 371 my (@fake_INPUT_pre); # For length(s) generated variables
372 my (@fake_INPUT);
373
374 # initialize info arrays
375 undef(%args_match);
376 undef(%var_types);
377 undef(%defaults);
378 undef(%arg_list) ;
379 undef(@proto_arg) ;
380 undef($processing_arg_with_types) ;
381 undef(%argtype_seen) ;
382 undef(@outlist) ;
383 undef(%in_out) ;
384 undef(%lengthof) ;
385 undef($proto_in_this_xsub) ;
386 undef($scope_in_this_xsub) ;
387 undef($interface);
388 undef($prepush_done);
389 $interface_macro = 'XSINTERFACE_FUNC' ;
390 $interface_macro_set = 'XSINTERFACE_FUNC_SET' ;
391 $ProtoThisXSUB = $WantPrototypes ;
392 $ScopeThisXSUB = 0;
393 $xsreturn = 0;
394
395 $_ = shift(@line);
396 while (my $kwd = check_keyword("REQUIRE|PROTOTYPES|FALLBACK|VERSIONCHECK|INCLUDE")) {
397 &{"${kwd}_handler"}() ;
398 next PARAGRAPH unless @line ;
399 $_ = shift(@line);
400 }
401
402 if (check_keyword("BOOT")) {
403 &check_cpp;
404 push (@BootCode, "#line $line_no[@line_no - @line] \"$filepathname\"")
405 if $WantLineNumbers && $line[0] !~ /^\s*#\s*line\b/;
406 push (@BootCode, @line, "") ;
407 next PARAGRAPH ;
408 }
409
410
411 # extract return type, function name and arguments
412 ($ret_type) = TidyType($_);
413 $RETVAL_no_return = 1 if $ret_type =~ s/^NO_OUTPUT\s+//;
414
415 # Allow one-line ANSI-like declaration
416 unshift @line, $2
417 if $process_argtypes
418 and $ret_type =~ s/^(.*?\w.*?)\s*\b(\w+\s*\(.*)/$1/s;
419
420 # a function definition needs at least 2 lines
421 blurt ("Error: Function definition too short '$ret_type'"), next PARAGRAPH
422 unless @line ;
423
008fb49c
JH		 424 $externC = 1 if $ret_type =~ s/^extern "C"\s+//;
425 $static = 1 if $ret_type =~ s/^static\s+//;
6b09c160
YST		 426
427 $func_header = shift(@line);
428 blurt ("Error: Cannot parse function definition from '$func_header'"), next PARAGRAPH
429 unless $func_header =~ /^(?:([\w:]*)::)?(\w+)\s*\(\s*(.*?)\s*\)\s*(const)?\s*(;\s*)?$/s;
430
431 ($class, $func_name, $orig_args) = ($1, $2, $3) ;
432 $class = "$4 $class" if $4;
433 ($pname = $func_name) =~ s/^($Prefix)?/$Packprefix/;
434 ($clean_func_name = $func_name) =~ s/^$Prefix//;
435 $Full_func_name = "${Packid}_$clean_func_name";
436 if ($Is_VMS) {
437 $Full_func_name = $SymSet->addsym($Full_func_name);
438 }
439
440 # Check for duplicate function definition
441 for my $tmp (@XSStack) {
442 next unless defined $tmp->{functions}{$Full_func_name};
443 Warn("Warning: duplicate function definition '$clean_func_name' detected");
444 last;
445 }
446 $XSStack[$XSS_work_idx]{functions}{$Full_func_name} ++ ;
447 %XsubAliases = %XsubAliasValues = %Interfaces = @Attributes = ();
448 $DoSetMagic = 1;
449
450 $orig_args =~ s/\\\s*/ /g; # process line continuations
451 my @args;
452
453 my %only_C_inlist; # Not in the signature of Perl function
454 if ($process_argtypes and $orig_args =~ /\S/) {
455 my $args = "$orig_args ,";
456 if ($args =~ /^( (??{ $C_arg }) , )* $ /x) {
457 @args = ($args =~ /\G ( (??{ $C_arg }) ) , /xg);
458 for ( @args ) {
459 s/^\s+//;
460 s/\s+$//;
461 my ($arg, $default) = / ( [^=]* ) ( (?: = .* )? ) /x;
462 my ($pre, $name) = ($arg =~ /(.*?) \s*
463 \b ( \w+ | length\( \s*\w+\s* \) )
464 \s* $ /x);
465 next unless defined($pre) && length($pre);
89345840 466 my $out_type = '';
6b09c160
YST		 467 my $inout_var;
468 if ($process_inout and s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//) {
469 my $type = $1;
470 $out_type = $type if $type ne 'IN';
471 $arg =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//;
472 $pre =~ s/^(IN|IN_OUTLIST|OUTLIST|OUT|IN_OUT)\s+//;
473 }
474 my $islength;
475 if ($name =~ /^length\( \s* (\w+) \s* \)\z/x) {
476 $name = "XSauto_length_of_$1";
477 $islength = 1;
478 die "Default value on length() argument: `$_'"
479 if length $default;
480 }
481 if (length $pre or $islength) { # Has a type
482 if ($islength) {
483 push @fake_INPUT_pre, $arg;
484 } else {
485 push @fake_INPUT, $arg;
486 }
487 # warn "pushing '$arg'\n";
488 $argtype_seen{$name}++;
489 $_ = "$name$default"; # Assigns to @args
490 }
491 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST" or $islength;
492 push @outlist, $name if $out_type =~ /OUTLIST$/;
493 $in_out{$name} = $out_type if $out_type;
494 }
495 } else {
496 @args = split(/\s*,\s*/, $orig_args);
497 Warn("Warning: cannot parse argument list '$orig_args', fallback to split");
498 }
499 } else {
500 @args = split(/\s*,\s*/, $orig_args);
501 for (@args) {
502 if ($process_inout and s/^(IN|IN_OUTLIST|OUTLIST|IN_OUT|OUT)\s+//) {
503 my $out_type = $1;
504 next if $out_type eq 'IN';
505 $only_C_inlist{$_} = 1 if $out_type eq "OUTLIST";
506 push @outlist, $name if $out_type =~ /OUTLIST$/;
507 $in_out{$_} = $out_type;
508 }
509 }
510 }
511 if (defined($class)) {
512 my $arg0 = ((defined($static) or $func_name eq 'new')
513 ? "CLASS" : "THIS");
514 unshift(@args, $arg0);
515 ($report_args = "$arg0, $report_args") =~ s/^\w+, $/$arg0/;
516 }
517 my $extra_args = 0;
518 @args_num = ();
519 $num_args = 0;
520 my $report_args = '';
521 foreach my $i (0 .. $#args) {
522 if ($args[$i] =~ s/\.\.\.//) {
95b611b0 523 $ellipsis = 1;
6b09c160
YST		 524 if ($args[$i] eq '' && $i == $#args) {
525 $report_args .= ", ...";
526 pop(@args);
527 last;
528 }
529 }
530 if ($only_C_inlist{$args[$i]}) {
531 push @args_num, undef;
532 } else {
533 push @args_num, ++$num_args;
534 $report_args .= ", $args[$i]";
535 }
536 if ($args[$i] =~ /^([^=]*[^\s=])\s*=\s*(.*)/s) {
537 $extra_args++;
538 $args[$i] = $1;
539 $defaults{$args[$i]} = $2;
540 $defaults{$args[$i]} =~ s/"/\\"/g;
541 }
542 $proto_arg[$i+1] = '$' ;
543 }
544 $min_args = $num_args - $extra_args;
545 $report_args =~ s/"/\\"/g;
546 $report_args =~ s/^,\s+//;
547 my @func_args = @args;
548 shift @func_args if defined($class);
549
550 for (@func_args) {
551 s/^/&/ if $in_out{$_};
552 }
553 $func_args = join(", ", @func_args);
554 @args_match{@args} = @args_num;
555
556 $PPCODE = grep(/^\s*PPCODE\s*:/, @line);
557 $CODE = grep(/^\s*CODE\s*:/, @line);
558 # Detect CODE: blocks which use ST(n)= or XST_m*(n,v)
559 # to set explicit return values.
560 $EXPLICIT_RETURN = ($CODE &&
561 ("@line" =~ /(\bST\s*\([^;]*=) | (\bXST_m\w+\s*\()/x ));
562 $ALIAS = grep(/^\s*ALIAS\s*:/, @line);
563 $INTERFACE = grep(/^\s*INTERFACE\s*:/, @line);
564
565 $xsreturn = 1 if $EXPLICIT_RETURN;
566
008fb49c
JH		 567 $externC = $externC ? qq[extern "C"] : "";
568
6b09c160
YST		 569 # print function header
570 print Q(<<"EOF");
008fb49c 571#$externC
6b09c160
YST		 572#XS(XS_${Full_func_name}); /* prototype to pass -Wmissing-prototypes */
573#XS(XS_${Full_func_name})
574#[[
97aff369
JH		 575##ifdef dVAR
576# dVAR; dXSARGS;
577##else
6b09c160 578# dXSARGS;
97aff369 579##endif
6b09c160
YST		 580EOF
581 print Q(<<"EOF") if $ALIAS ;
582# dXSI32;
583EOF
584 print Q(<<"EOF") if $INTERFACE ;
585# dXSFUNCTION($ret_type);
586EOF
95b611b0 587 if ($ellipsis) {
6b09c160
YST		 588 $cond = ($min_args ? qq(items < $min_args) : 0);
589 } elsif ($min_args == $num_args) {
590 $cond = qq(items != $min_args);
591 } else {
592 $cond = qq(items < $min_args || items > $num_args);
593 }
594
595 print Q(<<"EOF") if $except;
596# char errbuf[1024];
597# *errbuf = '\0';
598EOF
599
600 if ($ALIAS)
601 { print Q(<<"EOF") if $cond }
602# if ($cond)
bfb0b58a 603# Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "$report_args");
6b09c160
YST		 604EOF
605 else
606 { print Q(<<"EOF") if $cond }
607# if ($cond)
bfb0b58a 608# Perl_croak(aTHX_ "Usage: %s(%s)", "$pname", "$report_args");
6b09c160
YST		 609EOF
610
611 # cv doesn't seem to be used, in most cases unless we go in
612 # the if of this else
613 print Q(<<"EOF");
614# PERL_UNUSED_VAR(cv); /* -W */
615EOF
616
617 #gcc -Wall: if an xsub has PPCODE is used
618 #it is possible none of ST, XSRETURN or XSprePUSH macros are used
619 #hence `ax' (setup by dXSARGS) is unused
620 #XXX: could breakup the dXSARGS; into dSP;dMARK;dITEMS
621 #but such a move could break third-party extensions
622 print Q(<<"EOF") if $PPCODE;
623# PERL_UNUSED_VAR(ax); /* -Wall */
624EOF
625
626 print Q(<<"EOF") if $PPCODE;
627# SP -= items;
628EOF
629
630 # Now do a block of some sort.
631
632 $condnum = 0;
633 $cond = ''; # last CASE: condidional
634 push(@line, "$END:");
635 push(@line_no, $line_no[-1]);
636 $_ = '';
637 &check_cpp;
638 while (@line) {
639 &CASE_handler if check_keyword("CASE");
640 print Q(<<"EOF");
641# $except [[
642EOF
643
644 # do initialization of input variables
645 $thisdone = 0;
646 $retvaldone = 0;
647 $deferred = "";
648 %arg_list = () ;
649 $gotRETVAL = 0;
650
651 INPUT_handler() ;
652 process_keyword("INPUT|PREINIT|INTERFACE_MACRO|C_ARGS|ALIAS|ATTRS|PROTOTYPE|SCOPE|OVERLOAD") ;
653
654 print Q(<<"EOF") if $ScopeThisXSUB;
655# ENTER;
656# [[
657EOF
658
659 if (!$thisdone && defined($class)) {
660 if (defined($static) or $func_name eq 'new') {
661 print "\tchar *";
662 $var_types{"CLASS"} = "char *";
663 &generate_init("char *", 1, "CLASS");
664 }
665 else {
666 print "\t$class *";
667 $var_types{"THIS"} = "$class *";
668 &generate_init("$class *", 1, "THIS");
669 }
670 }
671
672 # do code
673 if (/^\s*NOT_IMPLEMENTED_YET/) {
674 print "\n\tPerl_croak(aTHX_ \"$pname: not implemented yet\");\n";
675 $_ = '' ;
676 } else {
677 if ($ret_type ne "void") {
678 print "\t" . &map_type($ret_type, 'RETVAL') . ";\n"
679 if !$retvaldone;
680 $args_match{"RETVAL"} = 0;
681 $var_types{"RETVAL"} = $ret_type;
682 print "\tdXSTARG;\n"
683 if $WantOptimize and $targetable{$type_kind{$ret_type}};
684 }
685
686 if (@fake_INPUT or @fake_INPUT_pre) {
687 unshift @line, @fake_INPUT_pre, @fake_INPUT, $_;
688 $_ = "";
689 $processing_arg_with_types = 1;
690 INPUT_handler() ;
691 }
692 print $deferred;
693
694 process_keyword("INIT|ALIAS|ATTRS|PROTOTYPE|INTERFACE_MACRO|INTERFACE|C_ARGS|OVERLOAD") ;
695
696 if (check_keyword("PPCODE")) {
697 print_section();
698 death ("PPCODE must be last thing") if @line;
699 print "\tLEAVE;\n" if $ScopeThisXSUB;
700 print "\tPUTBACK;\n\treturn;\n";
701 } elsif (check_keyword("CODE")) {
702 print_section() ;
703 } elsif (defined($class) and $func_name eq "DESTROY") {
704 print "\n\t";
705 print "delete THIS;\n";
706 } else {
707 print "\n\t";
708 if ($ret_type ne "void") {
709 print "RETVAL = ";
710 $wantRETVAL = 1;
711 }
712 if (defined($static)) {
713 if ($func_name eq 'new') {
714 $func_name = "$class";
715 } else {
716 print "${class}::";
717 }
718 } elsif (defined($class)) {
719 if ($func_name eq 'new') {
720 $func_name .= " $class";
721 } else {
722 print "THIS->";
723 }
724 }
725 $func_name =~ s/^\Q$args{'s'}//
726 if exists $args{'s'};
727 $func_name = 'XSFUNCTION' if $interface;
728 print "$func_name($func_args);\n";
729 }
730 }
731
732 # do output variables
733 $gotRETVAL = 0; # 1 if RETVAL seen in OUTPUT section;
734 undef $RETVAL_code ; # code to set RETVAL (from OUTPUT section);
735 # $wantRETVAL set if 'RETVAL =' autogenerated
736 ($wantRETVAL, $ret_type) = (0, 'void') if $RETVAL_no_return;
737 undef %outargs ;
738 process_keyword("POSTCALL|OUTPUT|ALIAS|ATTRS|PROTOTYPE|OVERLOAD");
739
740 &generate_output($var_types{$_}, $args_match{$_}, $_, $DoSetMagic)
741 for grep $in_out{$_} =~ /OUT$/, keys %in_out;
742
743 # all OUTPUT done, so now push the return value on the stack
744 if ($gotRETVAL && $RETVAL_code) {
745 print "\t$RETVAL_code\n";
746 } elsif ($gotRETVAL || $wantRETVAL) {
747 my $t = $WantOptimize && $targetable{$type_kind{$ret_type}};
748 my $var = 'RETVAL';
749 my $type = $ret_type;
750
751 # 0: type, 1: with_size, 2: how, 3: how_size
752 if ($t and not $t->[1] and $t->[0] eq 'p') {
753 # PUSHp corresponds to setpvn. Treate setpv directly
754 my $what = eval qq("$t->[2]");
755 warn $@ if $@;
756
757 print "\tsv_setpv(TARG, $what); XSprePUSH; PUSHTARG;\n";
758 $prepush_done = 1;
759 }
760 elsif ($t) {
761 my $what = eval qq("$t->[2]");
762 warn $@ if $@;
763
764 my $size = $t->[3];
765 $size = '' unless defined $size;
766 $size = eval qq("$size");
767 warn $@ if $@;
768 print "\tXSprePUSH; PUSH$t->[0]($what$size);\n";
769 $prepush_done = 1;
770 }
771 else {
772 # RETVAL almost never needs SvSETMAGIC()
773 &generate_output($ret_type, 0, 'RETVAL', 0);
774 }
775 }
776
777 $xsreturn = 1 if $ret_type ne "void";
778 my $num = $xsreturn;
779 my $c = @outlist;
780 print "\tXSprePUSH;" if $c and not $prepush_done;
781 print "\tEXTEND(SP,$c);\n" if $c;
782 $xsreturn += $c;
783 generate_output($var_types{$_}, $num++, $_, 0, 1) for @outlist;
784
785 # do cleanup
786 process_keyword("CLEANUP|ALIAS|ATTRS|PROTOTYPE|OVERLOAD") ;
787
788 print Q(<<"EOF") if $ScopeThisXSUB;
789# ]]
790EOF
791 print Q(<<"EOF") if $ScopeThisXSUB and not $PPCODE;
792# LEAVE;
793EOF
794
795 # print function trailer
796 print Q(<<"EOF");
797# ]]
798EOF
799 print Q(<<"EOF") if $except;
800# BEGHANDLERS
801# CATCHALL
802# sprintf(errbuf, "%s: %s\\tpropagated", Xname, Xreason);
803# ENDHANDLERS
804EOF
805 if (check_keyword("CASE")) {
806 blurt ("Error: No `CASE:' at top of function")
807 unless $condnum;
808 $_ = "CASE: $_"; # Restore CASE: label
809 next;
810 }
811 last if $_ eq "$END:";
812 death(/^$BLOCK_re/o ? "Misplaced `$1:'" : "Junk at end of function");
813 }
814
815 print Q(<<"EOF") if $except;
816# if (errbuf[0])
817# Perl_croak(aTHX_ errbuf);
818EOF
819
820 if ($xsreturn) {
821 print Q(<<"EOF") unless $PPCODE;
822# XSRETURN($xsreturn);
823EOF
824 } else {
825 print Q(<<"EOF") unless $PPCODE;
826# XSRETURN_EMPTY;
827EOF
828 }
829
830 print Q(<<"EOF");
831#]]
832#
833EOF
834
835 my $newXS = "newXS" ;
836 my $proto = "" ;
837
838 # Build the prototype string for the xsub
839 if ($ProtoThisXSUB) {
840 $newXS = "newXSproto";
841
842 if ($ProtoThisXSUB eq 2) {
843 # User has specified empty prototype
844 }
845 elsif ($ProtoThisXSUB eq 1) {
846 my $s = ';';
847 if ($min_args < $num_args) {
848 $s = '';
849 $proto_arg[$min_args] .= ";" ;
850 }
851 push @proto_arg, "$s\@"
95b611b0 852 if $ellipsis ;
6b09c160
YST		 853
854 $proto = join ("", grep defined, @proto_arg);
855 }
856 else {
857 # User has specified a prototype
858 $proto = $ProtoThisXSUB;
859 }
860 $proto = qq{, "$proto"};
861 }
862
863 if (%XsubAliases) {
864 $XsubAliases{$pname} = 0
865 unless defined $XsubAliases{$pname} ;
866 while ( ($name, $value) = each %XsubAliases) {
867 push(@InitFileCode, Q(<<"EOF"));
868# cv = newXS(\"$name\", XS_$Full_func_name, file);
869# XSANY.any_i32 = $value ;
870EOF
871 push(@InitFileCode, Q(<<"EOF")) if $proto;
872# sv_setpv((SV*)cv$proto) ;
873EOF
874 }
875 }
876 elsif (@Attributes) {
877 push(@InitFileCode, Q(<<"EOF"));
878# cv = newXS(\"$pname\", XS_$Full_func_name, file);
879# apply_attrs_string("$Package", cv, "@Attributes", 0);
880EOF
881 }
882 elsif ($interface) {
883 while ( ($name, $value) = each %Interfaces) {
884 $name = "$Package\::$name" unless $name =~ /::/;
885 push(@InitFileCode, Q(<<"EOF"));
886# cv = newXS(\"$name\", XS_$Full_func_name, file);
887# $interface_macro_set(cv,$value) ;
888EOF
889 push(@InitFileCode, Q(<<"EOF")) if $proto;
890# sv_setpv((SV*)cv$proto) ;
891EOF
892 }
893 }
894 else {
895 push(@InitFileCode,
896 " ${newXS}(\"$pname\", XS_$Full_func_name, file$proto);\n");
897 }
898 }
899
900 if ($Overload) # make it findable with fetchmethod
901 {
902 print Q(<<"EOF");
903#XS(XS_${Packid}_nil); /* prototype to pass -Wmissing-prototypes */
904#XS(XS_${Packid}_nil)
905#{
906# XSRETURN_EMPTY;
907#}
908#
909EOF
910 unshift(@InitFileCode, <<"MAKE_FETCHMETHOD_WORK");
911 /* Making a sub named "${Package}::()" allows the package */
912 /* to be findable via fetchmethod(), and causes */
913 /* overload::Overloaded("${Package}") to return true. */
914 newXS("${Package}::()", XS_${Packid}_nil, file$proto);
915MAKE_FETCHMETHOD_WORK
916 }
917
918 # print initialization routine
919
920 print Q(<<"EOF");
921##ifdef __cplusplus
922#extern "C"
923##endif
924EOF
925
926 print Q(<<"EOF");
927#XS(boot_$Module_cname); /* prototype to pass -Wmissing-prototypes */
928#XS(boot_$Module_cname)
929EOF
930
931 print Q(<<"EOF");
932#[[
97aff369
JH		 933##ifdef dVAR
934# dVAR; dXSARGS;
935##else
6b09c160 936# dXSARGS;
97aff369 937##endif
6b09c160
YST		 938EOF
939
940 #-Wall: if there is no $Full_func_name there are no xsubs in this .xs
941 #so `file' is unused
942 print Q(<<"EOF") if $Full_func_name;
f05ddbb8 943# const char* file = __FILE__;
6b09c160
YST		 944EOF
945
946 print Q("#\n");
947
948 print Q(<<"EOF");
949# PERL_UNUSED_VAR(cv); /* -W */
950# PERL_UNUSED_VAR(items); /* -W */
951EOF
952
953 print Q(<<"EOF") if $WantVersionChk ;
954# XS_VERSION_BOOTCHECK ;
955#
956EOF
957
958 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces ;
959# {
960# CV * cv ;
961#
962EOF
963
964 print Q(<<"EOF") if ($Overload);
965# /* register the overloading (type 'A') magic */
966# PL_amagic_generation++;
967# /* The magic for overload gets a GV* via gv_fetchmeth as */
968# /* mentioned above, and looks in the SV* slot of it for */
969# /* the "fallback" status. */
970# sv_setsv(
971# get_sv( "${Package}::()", TRUE ),
972# $Fallback
973# );
974EOF
975
976 print @InitFileCode;
977
978 print Q(<<"EOF") if defined $XsubAliases or defined $Interfaces ;
979# }
980EOF
981
982 if (@BootCode)
983 {
984 print "\n /* Initialisation Section */\n\n" ;
985 @line = @BootCode;
986 print_section();
987 print "\n /* End of Initialisation Section */\n\n" ;
988 }
989
0932863f
NC		 990 if ($] >= 5.009) {
991 print <<'EOF';
992 if (PL_unitcheckav)
993 call_list(PL_scopestack_ix, PL_unitcheckav);
994EOF
995 }
89345840 996
6b09c160
YST		 997 print Q(<<"EOF");
998# XSRETURN_YES;
999#]]
1000#
1001EOF
1002
1003 warn("Please specify prototyping behavior for $filename (see perlxs manual)\n")
1004 unless $ProtoUsed ;
1005
1006 chdir($orig_cwd);
1007 select($orig_fh);
1008 untie *PSEUDO_STDOUT if tied *PSEUDO_STDOUT;
907ce46c 1009 close $FH;
6b09c160
YST		 1010
1011 return 1;
1012}
1013
1014sub errors { $errors }
1015
1016sub standard_typemap_locations {
1017 # Add all the default typemap locations to the search path
1018 my @tm = qw(typemap);
1019
1020 my $updir = File::Spec->updir;
1021 foreach my $dir (File::Spec->catdir(($updir) x 1), File::Spec->catdir(($updir) x 2),
1022 File::Spec->catdir(($updir) x 3), File::Spec->catdir(($updir) x 4)) {
1023
1024 unshift @tm, File::Spec->catfile($dir, 'typemap');
1025 unshift @tm, File::Spec->catfile($dir, lib => ExtUtils => 'typemap');
1026 }
1027 foreach my $dir (@INC) {
1028 my $file = File::Spec->catfile($dir, ExtUtils => 'typemap');
1029 unshift @tm, $file if -e $file;
1030 }
1031 return @tm;
1032}
1033
1034sub TrimWhitespace
1035{
1036 $_[0] =~ s/^\s+|\s+$//go ;
1037}
1038
1039sub TidyType
1040 {
1041 local ($_) = @_ ;
1042
1043 # rationalise any '*' by joining them into bunches and removing whitespace
1044 s#\s*(\*+)\s*#$1#g;
1045 s#(\*+)# $1 #g ;
1046
1047 # change multiple whitespace into a single space
1048 s/\s+/ /g ;
1049
1050 # trim leading & trailing whitespace
1051 TrimWhitespace($_) ;
1052
1053 $_ ;
1054}
1055
1056# Input: ($_, @line) == unparsed input.
1057# Output: ($_, @line) == (rest of line, following lines).
1058# Return: the matched keyword if found, otherwise 0
1059sub check_keyword {
1060 $_ = shift(@line) while !/\S/ && @line;
1061 s/^(\s*)($_[0])\s*:\s*(?:#.*)?/$1/s && $2;
1062}
1063
1064sub print_section {
1065 # the "do" is required for right semantics
1066 do { $_ = shift(@line) } while !/\S/ && @line;
1067
1068 print("#line ", $line_no[@line_no - @line -1], " \"$filepathname\"\n")
1069 if $WantLineNumbers && !/^\s*#\s*line\b/ && !/^#if XSubPPtmp/;
1070 for (; defined($_) && !/^$BLOCK_re/o; $_ = shift(@line)) {
1071 print "$_\n";
1072 }
1073 print 'ExtUtils::ParseXS::CountLines'->end_marker, "\n" if $WantLineNumbers;
1074}
1075
1076sub merge_section {
1077 my $in = '';
1078
1079 while (!/\S/ && @line) {
1080 $_ = shift(@line);
1081 }
1082
1083 for (; defined($_) && !/^$BLOCK_re/o; $_ = shift(@line)) {
1084 $in .= "$_\n";
1085 }
1086 chomp $in;
1087 return $in;
1088 }
1089
1090sub process_keyword($)
1091 {
1092 my($pattern) = @_ ;
1093 my $kwd ;
1094
1095 &{"${kwd}_handler"}()
1096 while $kwd = check_keyword($pattern) ;
1097 }
1098
1099sub CASE_handler {
1100 blurt ("Error: `CASE:' after unconditional `CASE:'")
1101 if $condnum && $cond eq '';
1102 $cond = $_;
1103 TrimWhitespace($cond);
1104 print " ", ($condnum++ ? " else" : ""), ($cond ? " if ($cond)\n" : "\n");
1105 $_ = '' ;
1106}
1107
1108sub INPUT_handler {
1109 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1110 last if /^\s*NOT_IMPLEMENTED_YET/;
1111 next unless /\S/; # skip blank lines
1112
1113 TrimWhitespace($_) ;
1114 my $line = $_ ;
1115
1116 # remove trailing semicolon if no initialisation
1117 s/\s*;$//g unless /[=;+].*\S/ ;
1118
1119 # Process the length(foo) declarations
1120 if (s/^([^=]*)\blength\(\s*(\w+)\s*\)\s*$/$1 XSauto_length_of_$2=NO_INIT/x) {
1121 print "\tSTRLEN\tSTRLEN_length_of_$2;\n";
1122 $lengthof{$2} = $name;
1123 # $islengthof{$name} = $1;
1124 $deferred .= "\n\tXSauto_length_of_$2 = STRLEN_length_of_$2;";
1125 }
1126
1127 # check for optional initialisation code
1128 my $var_init = '' ;
1129 $var_init = $1 if s/\s*([=;+].*)$//s ;
1130 $var_init =~ s/"/\\"/g;
1131
1132 s/\s+/ /g;
1133 my ($var_type, $var_addr, $var_name) = /^(.*?[^&\s])\s*(\&?)\s*\b(\w+)$/s
1134 or blurt("Error: invalid argument declaration '$line'"), next;
1135
1136 # Check for duplicate definitions
1137 blurt ("Error: duplicate definition of argument '$var_name' ignored"), next
1138 if $arg_list{$var_name}++
1139 or defined $argtype_seen{$var_name} and not $processing_arg_with_types;
1140
1141 $thisdone |= $var_name eq "THIS";
1142 $retvaldone |= $var_name eq "RETVAL";
1143 $var_types{$var_name} = $var_type;
1144 # XXXX This check is a safeguard against the unfinished conversion of
1145 # generate_init(). When generate_init() is fixed,
1146 # one can use 2-args map_type() unconditionally.
1147 if ($var_type =~ / \( \s* \* \s* \) /x) {
1148 # Function pointers are not yet supported with &output_init!
1149 print "\t" . &map_type($var_type, $var_name);
1150 $name_printed = 1;
1151 } else {
1152 print "\t" . &map_type($var_type);
1153 $name_printed = 0;
1154 }
1155 $var_num = $args_match{$var_name};
1156
1157 $proto_arg[$var_num] = ProtoString($var_type)
1158 if $var_num ;
1159 $func_args =~ s/\b($var_name)\b/&$1/ if $var_addr;
1160 if ($var_init =~ /^[=;]\s*NO_INIT\s*;?\s*$/
1161 or $in_out{$var_name} and $in_out{$var_name} =~ /^OUT/
1162 and $var_init !~ /\S/) {
1163 if ($name_printed) {
1164 print ";\n";
1165 } else {
1166 print "\t$var_name;\n";
1167 }
1168 } elsif ($var_init =~ /\S/) {
1169 &output_init($var_type, $var_num, $var_name, $var_init, $name_printed);
1170 } elsif ($var_num) {
1171 # generate initialization code
1172 &generate_init($var_type, $var_num, $var_name, $name_printed);
1173 } else {
1174 print ";\n";
1175 }
1176 }
1177}
1178
1179sub OUTPUT_handler {
1180 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1181 next unless /\S/;
1182 if (/^\s*SETMAGIC\s*:\s*(ENABLE|DISABLE)\s*/) {
1183 $DoSetMagic = ($1 eq "ENABLE" ? 1 : 0);
1184 next;
1185 }
1186 my ($outarg, $outcode) = /^\s*(\S+)\s*(.*?)\s*$/s ;
1187 blurt ("Error: duplicate OUTPUT argument '$outarg' ignored"), next
1188 if $outargs{$outarg} ++ ;
1189 if (!$gotRETVAL and $outarg eq 'RETVAL') {
1190 # deal with RETVAL last
1191 $RETVAL_code = $outcode ;
1192 $gotRETVAL = 1 ;
1193 next ;
1194 }
1195 blurt ("Error: OUTPUT $outarg not an argument"), next
1196 unless defined($args_match{$outarg});
1197 blurt("Error: No input definition for OUTPUT argument '$outarg' - ignored"), next
1198 unless defined $var_types{$outarg} ;
1199 $var_num = $args_match{$outarg};
1200 if ($outcode) {
1201 print "\t$outcode\n";
1202 print "\tSvSETMAGIC(ST(" , $var_num-1 , "));\n" if $DoSetMagic;
1203 } else {
1204 &generate_output($var_types{$outarg}, $var_num, $outarg, $DoSetMagic);
1205 }
1206 delete $in_out{$outarg} # No need to auto-OUTPUT
1207 if exists $in_out{$outarg} and $in_out{$outarg} =~ /OUT$/;
1208 }
1209}
1210
1211sub C_ARGS_handler() {
1212 my $in = merge_section();
1213
1214 TrimWhitespace($in);
1215 $func_args = $in;
1216}
1217
1218sub INTERFACE_MACRO_handler() {
1219 my $in = merge_section();
1220
1221 TrimWhitespace($in);
1222 if ($in =~ /\s/) { # two
1223 ($interface_macro, $interface_macro_set) = split ' ', $in;
1224 } else {
1225 $interface_macro = $in;
1226 $interface_macro_set = 'UNKNOWN_CVT'; # catch later
1227 }
1228 $interface = 1; # local
1229 $Interfaces = 1; # global
1230}
1231
1232sub INTERFACE_handler() {
1233 my $in = merge_section();
1234
1235 TrimWhitespace($in);
1236
1237 foreach (split /[\s,]+/, $in) {
5331dc36
SP		 1238 my $name = $_;
1239 $name =~ s/^$Prefix//;
1240 $Interfaces{$name} = $_;
6b09c160
YST		 1241 }
1242 print Q(<<"EOF");
1243# XSFUNCTION = $interface_macro($ret_type,cv,XSANY.any_dptr);
1244EOF
1245 $interface = 1; # local
1246 $Interfaces = 1; # global
1247}
1248
1249sub CLEANUP_handler() { print_section() }
1250sub PREINIT_handler() { print_section() }
1251sub POSTCALL_handler() { print_section() }
1252sub INIT_handler() { print_section() }
1253
1254sub GetAliases
1255 {
1256 my ($line) = @_ ;
1257 my ($orig) = $line ;
1258 my ($alias) ;
1259 my ($value) ;
1260
1261 # Parse alias definitions
1262 # format is
1263 # alias = value alias = value ...
1264
1265 while ($line =~ s/^\s*([\w:]+)\s*=\s*(\w+)\s*//) {
1266 $alias = $1 ;
1267 $orig_alias = $alias ;
1268 $value = $2 ;
1269
1270 # check for optional package definition in the alias
1271 $alias = $Packprefix . $alias if $alias !~ /::/ ;
1272
1273 # check for duplicate alias name & duplicate value
1274 Warn("Warning: Ignoring duplicate alias '$orig_alias'")
1275 if defined $XsubAliases{$alias} ;
1276
1277 Warn("Warning: Aliases '$orig_alias' and '$XsubAliasValues{$value}' have identical values")
1278 if $XsubAliasValues{$value} ;
1279
1280 $XsubAliases = 1;
1281 $XsubAliases{$alias} = $value ;
1282 $XsubAliasValues{$value} = $orig_alias ;
1283 }
1284
1285 blurt("Error: Cannot parse ALIAS definitions from '$orig'")
1286 if $line ;
1287 }
1288
1289sub ATTRS_handler ()
1290 {
1291 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1292 next unless /\S/;
1293 TrimWhitespace($_) ;
1294 push @Attributes, $_;
1295 }
1296 }
1297
1298sub ALIAS_handler ()
1299 {
1300 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1301 next unless /\S/;
1302 TrimWhitespace($_) ;
1303 GetAliases($_) if $_ ;
1304 }
1305 }
1306
1307sub OVERLOAD_handler()
1308{
1309 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1310 next unless /\S/;
1311 TrimWhitespace($_) ;
1312 while ( s/^\s*([\w:"\\)\+\-\*\/\%\<\>\.\&\|\^\!\~\{\}\=]+)\s*//) {
1313 $Overload = 1 unless $Overload;
1314 my $overload = "$Package\::(".$1 ;
1315 push(@InitFileCode,
1316 " newXS(\"$overload\", XS_$Full_func_name, file$proto);\n");
1317 }
1318 }
1319}
1320
1321sub FALLBACK_handler()
1322{
1323 # the rest of the current line should contain either TRUE,
1324 # FALSE or UNDEF
1325
1326 TrimWhitespace($_) ;
1327 my %map = (
1328 TRUE => "PL_sv_yes", 1 => "PL_sv_yes",
1329 FALSE => "PL_sv_no", 0 => "PL_sv_no",
1330 UNDEF => "PL_sv_undef",
1331 ) ;
1332
1333 # check for valid FALLBACK value
1334 death ("Error: FALLBACK: TRUE/FALSE/UNDEF") unless exists $map{uc $_} ;
1335
1336 $Fallback = $map{uc $_} ;
1337}
1338
1339
1340sub REQUIRE_handler ()
1341 {
1342 # the rest of the current line should contain a version number
1343 my ($Ver) = $_ ;
1344
1345 TrimWhitespace($Ver) ;
1346
1347 death ("Error: REQUIRE expects a version number")
1348 unless $Ver ;
1349
1350 # check that the version number is of the form n.n
1351 death ("Error: REQUIRE: expected a number, got '$Ver'")
1352 unless $Ver =~ /^\d+(\.\d*)?/ ;
1353
1354 death ("Error: xsubpp $Ver (or better) required--this is only $VERSION.")
1355 unless $VERSION >= $Ver ;
1356 }
1357
1358sub VERSIONCHECK_handler ()
1359 {
1360 # the rest of the current line should contain either ENABLE or
1361 # DISABLE
1362
1363 TrimWhitespace($_) ;
1364
1365 # check for ENABLE/DISABLE
1366 death ("Error: VERSIONCHECK: ENABLE/DISABLE")
1367 unless /^(ENABLE|DISABLE)/i ;
1368
1369 $WantVersionChk = 1 if $1 eq 'ENABLE' ;
1370 $WantVersionChk = 0 if $1 eq 'DISABLE' ;
1371
1372 }
1373
1374sub PROTOTYPE_handler ()
1375 {
1376 my $specified ;
1377
1378 death("Error: Only 1 PROTOTYPE definition allowed per xsub")
1379 if $proto_in_this_xsub ++ ;
1380
1381 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1382 next unless /\S/;
1383 $specified = 1 ;
1384 TrimWhitespace($_) ;
1385 if ($_ eq 'DISABLE') {
1386 $ProtoThisXSUB = 0
1387 } elsif ($_ eq 'ENABLE') {
1388 $ProtoThisXSUB = 1
1389 } else {
1390 # remove any whitespace
1391 s/\s+//g ;
1392 death("Error: Invalid prototype '$_'")
1393 unless ValidProtoString($_) ;
1394 $ProtoThisXSUB = C_string($_) ;
1395 }
1396 }
1397
1398 # If no prototype specified, then assume empty prototype ""
1399 $ProtoThisXSUB = 2 unless $specified ;
1400
1401 $ProtoUsed = 1 ;
1402
1403 }
1404
1405sub SCOPE_handler ()
1406 {
1407 death("Error: Only 1 SCOPE declaration allowed per xsub")
1408 if $scope_in_this_xsub ++ ;
1409
1410 for (; !/^$BLOCK_re/o; $_ = shift(@line)) {
1411 next unless /\S/;
1412 TrimWhitespace($_) ;
1413 if ($_ =~ /^DISABLE/i) {
1414 $ScopeThisXSUB = 0
1415 } elsif ($_ =~ /^ENABLE/i) {
1416 $ScopeThisXSUB = 1
1417 }
1418 }
1419
1420 }
1421
1422sub PROTOTYPES_handler ()
1423 {
1424 # the rest of the current line should contain either ENABLE or
1425 # DISABLE
1426
1427 TrimWhitespace($_) ;
1428
1429 # check for ENABLE/DISABLE
1430 death ("Error: PROTOTYPES: ENABLE/DISABLE")
1431 unless /^(ENABLE|DISABLE)/i ;
1432
1433 $WantPrototypes = 1 if $1 eq 'ENABLE' ;
1434 $WantPrototypes = 0 if $1 eq 'DISABLE' ;
1435 $ProtoUsed = 1 ;
1436
1437 }
1438
1439sub INCLUDE_handler ()
1440 {
1441 # the rest of the current line should contain a valid filename
1442
1443 TrimWhitespace($_) ;
1444
1445 death("INCLUDE: filename missing")
1446 unless $_ ;
1447
1448 death("INCLUDE: output pipe is illegal")
1449 if /^\s*\|/ ;
1450
1451 # simple minded recursion detector
1452 death("INCLUDE loop detected")
1453 if $IncludedFiles{$_} ;
1454
1455 ++ $IncludedFiles{$_} unless /\|\s*$/ ;
1456
1457 # Save the current file context.
1458 push(@XSStack, {
1459 type => 'file',
1460 LastLine => $lastline,
1461 LastLineNo => $lastline_no,
1462 Line => \@line,
1463 LineNo => \@line_no,
1464 Filename => $filename,
d724ebe1 1465 Filepathname => $filepathname,
6b09c160
YST		 1466 Handle => $FH,
1467 }) ;
1468
907ce46c 1469 $FH = Symbol::gensym();
6b09c160
YST		 1470
1471 # open the new file
1472 open ($FH, "$_") or death("Cannot open '$_': $!") ;
1473
1474 print Q(<<"EOF");
1475#
1476#/* INCLUDE: Including '$_' from '$filename' */
1477#
1478EOF
1479
d724ebe1 1480 $filepathname = $filename = $_ ;
6b09c160
YST		 1481
1482 # Prime the pump by reading the first
1483 # non-blank line
1484
1485 # skip leading blank lines
1486 while (<$FH>) {
1487 last unless /^\s*$/ ;
1488 }
1489
1490 $lastline = $_ ;
1491 $lastline_no = $. ;
1492
1493 }
1494
1495sub PopFile()
1496 {
1497 return 0 unless $XSStack[-1]{type} eq 'file' ;
1498
1499 my $data = pop @XSStack ;
1500 my $ThisFile = $filename ;
1501 my $isPipe = ($filename =~ /\|\s*$/) ;
1502
1503 -- $IncludedFiles{$filename}
1504 unless $isPipe ;
1505
1506 close $FH ;
1507
1508 $FH = $data->{Handle} ;
d724ebe1
NC		 1509 # $filename is the leafname, which for some reason isused for diagnostic
1510 # messages, whereas $filepathname is the full pathname, and is used for
1511 # #line directives.
6b09c160 1512 $filename = $data->{Filename} ;
d724ebe1 1513 $filepathname = $data->{Filepathname} ;
6b09c160
YST		 1514 $lastline = $data->{LastLine} ;
1515 $lastline_no = $data->{LastLineNo} ;
1516 @line = @{ $data->{Line} } ;
1517 @line_no = @{ $data->{LineNo} } ;
1518
1519 if ($isPipe and $? ) {
1520 -- $lastline_no ;
1521 print STDERR "Error reading from pipe '$ThisFile': $! in $filename, line $lastline_no\n" ;
1522 exit 1 ;
1523 }
1524
1525 print Q(<<"EOF");
1526#
1527#/* INCLUDE: Returning to '$filename' from '$ThisFile' */
1528#
1529EOF
1530
1531 return 1 ;
1532 }
1533
1534sub ValidProtoString ($)
1535 {
1536 my($string) = @_ ;
1537
1538 if ( $string =~ /^$proto_re+$/ ) {
1539 return $string ;
1540 }
1541
1542 return 0 ;
1543 }
1544
1545sub C_string ($)
1546 {
1547 my($string) = @_ ;
1548
1549 $string =~ s[\\][\\\\]g ;
1550 $string ;
1551 }
1552
1553sub ProtoString ($)
1554 {
1555 my ($type) = @_ ;
1556
1557 $proto_letter{$type} or "\$" ;
1558 }
1559
1560sub check_cpp {
1561 my @cpp = grep(/^\#\s*(?:if|e\w+)/, @line);
1562 if (@cpp) {
1563 my ($cpp, $cpplevel);
1564 for $cpp (@cpp) {
1565 if ($cpp =~ /^\#\s*if/) {
1566 $cpplevel++;
1567 } elsif (!$cpplevel) {
1568 Warn("Warning: #else/elif/endif without #if in this function");
1569 print STDERR " (precede it with a blank line if the matching #if is outside the function)\n"
1570 if $XSStack[-1]{type} eq 'if';
1571 return;
1572 } elsif ($cpp =~ /^\#\s*endif/) {
1573 $cpplevel--;
1574 }
1575 }
1576 Warn("Warning: #if without #endif in this function") if $cpplevel;
1577 }
1578}
1579
1580
1581sub Q {
1582 my($text) = @_;
1583 $text =~ s/^#//gm;
1584 $text =~ s/\[\[/{/g;
1585 $text =~ s/\]\]/}/g;
1586 $text;
1587}
1588
1589# Read next xsub into @line from ($lastline, <$FH>).
1590sub fetch_para {
1591 # parse paragraph
1592 death ("Error: Unterminated `#if/#ifdef/#ifndef'")
1593 if !defined $lastline && $XSStack[-1]{type} eq 'if';
1594 @line = ();
1595 @line_no = () ;
1596 return PopFile() if !defined $lastline;
1597
1598 if ($lastline =~
1599 /^MODULE\s*=\s*([\w:]+)(?:\s+PACKAGE\s*=\s*([\w:]+))?(?:\s+PREFIX\s*=\s*(\S+))?\s*$/) {
1600 $Module = $1;
1601 $Package = defined($2) ? $2 : ''; # keep -w happy
1602 $Prefix = defined($3) ? $3 : ''; # keep -w happy
1603 $Prefix = quotemeta $Prefix ;
1604 ($Module_cname = $Module) =~ s/\W/_/g;
1605 ($Packid = $Package) =~ tr/:/_/;
1606 $Packprefix = $Package;
1607 $Packprefix .= "::" if $Packprefix ne "";
1608 $lastline = "";
1609 }
1610
1611 for (;;) {
1612 # Skip embedded PODs
1613 while ($lastline =~ /^=/) {
1614 while ($lastline = <$FH>) {
1615 last if ($lastline =~ /^=cut\s*$/);
1616 }
1617 death ("Error: Unterminated pod") unless $lastline;
1618 $lastline = <$FH>;
1619 chomp $lastline;
1620 $lastline =~ s/^\s+$//;
1621 }
1622 if ($lastline !~ /^\s*#/ ||
1623 # CPP directives:
1624 # ANSI: if ifdef ifndef elif else endif define undef
1625 # line error pragma
1626 # gcc: warning include_next
1627 # obj-c: import
1628 # others: ident (gcc notes that some cpps have this one)
1629 $lastline =~ /^#[ \t]*(?:(?:if|ifn?def|elif|else|endif|define|undef|pragma|error|warning|line\s+\d+|ident)\b|(?:include(?:_next)?|import)\s*["<].*[>"])/) {
1630 last if $lastline =~ /^\S/ && @line && $line[-1] eq "";
1631 push(@line, $lastline);
1632 push(@line_no, $lastline_no) ;
1633 }
1634
1635 # Read next line and continuation lines
1636 last unless defined($lastline = <$FH>);
1637 $lastline_no = $.;
1638 my $tmp_line;
1639 $lastline .= $tmp_line
1640 while ($lastline =~ /\\$/ && defined($tmp_line = <$FH>));
1641
1642 chomp $lastline;
1643 $lastline =~ s/^\s+$//;
1644 }
1645 pop(@line), pop(@line_no) while @line && $line[-1] eq "";
1646 1;
1647}
1648
1649sub output_init {
1650 local($type, $num, $var, $init, $name_printed) = @_;
1651 local($arg) = "ST(" . ($num - 1) . ")";
1652
1653 if ( $init =~ /^=/ ) {
1654 if ($name_printed) {
1655 eval qq/print " $init\\n"/;
1656 } else {
1657 eval qq/print "\\t$var $init\\n"/;
1658 }
1659 warn $@ if $@;
1660 } else {
1661 if ( $init =~ s/^\+// && $num ) {
1662 &generate_init($type, $num, $var, $name_printed);
1663 } elsif ($name_printed) {
1664 print ";\n";
1665 $init =~ s/^;//;
1666 } else {
1667 eval qq/print "\\t$var;\\n"/;
1668 warn $@ if $@;
1669 $init =~ s/^;//;
1670 }
1671 $deferred .= eval qq/"\\n\\t$init\\n"/;
1672 warn $@ if $@;
1673 }
1674}
1675
1676sub Warn
1677 {
1678 # work out the line number
1679 my $line_no = $line_no[@line_no - @line -1] ;
1680
1681 print STDERR "@_ in $filename, line $line_no\n" ;
1682 }
1683
1684sub blurt
1685 {
1686 Warn @_ ;
1687 $errors ++
1688 }
1689
1690sub death
1691 {
1692 Warn @_ ;
1693 exit 1 ;
1694 }
1695
1696sub generate_init {
1697 local($type, $num, $var) = @_;
1698 local($arg) = "ST(" . ($num - 1) . ")";
1699 local($argoff) = $num - 1;
1700 local($ntype);
1701 local($tk);
1702
1703 $type = TidyType($type) ;
1704 blurt("Error: '$type' not in typemap"), return
1705 unless defined($type_kind{$type});
1706
1707 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1708 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1709 $tk = $type_kind{$type};
1710 $tk =~ s/OBJ$/REF/ if $func_name =~ /DESTROY$/;
1711 if ($tk eq 'T_PV' and exists $lengthof{$var}) {
1712 print "\t$var" unless $name_printed;
1713 print " = ($type)SvPV($arg, STRLEN_length_of_$var);\n";
1714 die "default value not supported with length(NAME) supplied"
1715 if defined $defaults{$var};
1716 return;
1717 }
1718 $type =~ tr/:/_/ unless $hiertype;
1719 blurt("Error: No INPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1720 unless defined $input_expr{$tk} ;
1721 $expr = $input_expr{$tk};
1722 if ($expr =~ /DO_ARRAY_ELEM/) {
1723 blurt("Error: '$subtype' not in typemap"), return
1724 unless defined($type_kind{$subtype});
1725 blurt("Error: No INPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1726 unless defined $input_expr{$type_kind{$subtype}} ;
1727 $subexpr = $input_expr{$type_kind{$subtype}};
1728 $subexpr =~ s/\$type/\$subtype/g;
1729 $subexpr =~ s/ntype/subtype/g;
1730 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1731 $subexpr =~ s/\n\t/\n\t\t/g;
1732 $subexpr =~ s/is not of (.*\")/[arg %d] is not of $1, ix_$var + 1/g;
1733 $subexpr =~ s/\$var/${var}[ix_$var - $argoff]/;
1734 $expr =~ s/DO_ARRAY_ELEM/$subexpr/;
1735 }
1736 if ($expr =~ m#/\*.*scope.*\*/#i) { # "scope" in C comments
1737 $ScopeThisXSUB = 1;
1738 }
1739 if (defined($defaults{$var})) {
1740 $expr =~ s/(\t+)/$1 /g;
1741 $expr =~ s/ /\t/g;
1742 if ($name_printed) {
1743 print ";\n";
1744 } else {
1745 eval qq/print "\\t$var;\\n"/;
1746 warn $@ if $@;
1747 }
1748 if ($defaults{$var} eq 'NO_INIT') {
1749 $deferred .= eval qq/"\\n\\tif (items >= $num) {\\n$expr;\\n\\t}\\n"/;
1750 } else {
1751 $deferred .= eval qq/"\\n\\tif (items < $num)\\n\\t $var = $defaults{$var};\\n\\telse {\\n$expr;\\n\\t}\\n"/;
1752 }
1753 warn $@ if $@;
1754 } elsif ($ScopeThisXSUB or $expr !~ /^\s*\$var =/) {
1755 if ($name_printed) {
1756 print ";\n";
1757 } else {
1758 eval qq/print "\\t$var;\\n"/;
1759 warn $@ if $@;
1760 }
1761 $deferred .= eval qq/"\\n$expr;\\n"/;
1762 warn $@ if $@;
1763 } else {
1764 die "panic: do not know how to handle this branch for function pointers"
1765 if $name_printed;
1766 eval qq/print "$expr;\\n"/;
1767 warn $@ if $@;
1768 }
1769}
1770
1771sub generate_output {
1772 local($type, $num, $var, $do_setmagic, $do_push) = @_;
1773 local($arg) = "ST(" . ($num - ($num != 0)) . ")";
1774 local($argoff) = $num - 1;
1775 local($ntype);
1776
1777 $type = TidyType($type) ;
1778 if ($type =~ /^array\(([^,]*),(.*)\)/) {
1779 print "\t$arg = sv_newmortal();\n";
1780 print "\tsv_setpvn($arg, (char *)$var, $2 * sizeof($1));\n";
1781 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1782 } else {
1783 blurt("Error: '$type' not in typemap"), return
1784 unless defined($type_kind{$type});
1785 blurt("Error: No OUTPUT definition for type '$type', typekind '$type_kind{$type}' found"), return
1786 unless defined $output_expr{$type_kind{$type}} ;
1787 ($ntype = $type) =~ s/\s*\*/Ptr/g;
1788 $ntype =~ s/\(\)//g;
1789 ($subtype = $ntype) =~ s/(?:Array)?(?:Ptr)?$//;
1790 $expr = $output_expr{$type_kind{$type}};
1791 if ($expr =~ /DO_ARRAY_ELEM/) {
1792 blurt("Error: '$subtype' not in typemap"), return
1793 unless defined($type_kind{$subtype});
1794 blurt("Error: No OUTPUT definition for type '$subtype', typekind '$type_kind{$subtype}' found"), return
1795 unless defined $output_expr{$type_kind{$subtype}} ;
1796 $subexpr = $output_expr{$type_kind{$subtype}};
1797 $subexpr =~ s/ntype/subtype/g;
1798 $subexpr =~ s/\$arg/ST(ix_$var)/g;
1799 $subexpr =~ s/\$var/${var}[ix_$var]/g;
1800 $subexpr =~ s/\n\t/\n\t\t/g;
1801 $expr =~ s/DO_ARRAY_ELEM\n/$subexpr/;
1802 eval "print qq\a$expr\a";
1803 warn $@ if $@;
1804 print "\t\tSvSETMAGIC(ST(ix_$var));\n" if $do_setmagic;
1805 } elsif ($var eq 'RETVAL') {
1806 if ($expr =~ /^\t\$arg = new/) {
1807 # We expect that $arg has refcnt 1, so we need to
1808 # mortalize it.
1809 eval "print qq\a$expr\a";
1810 warn $@ if $@;
1811 print "\tsv_2mortal(ST($num));\n";
1812 print "\tSvSETMAGIC(ST($num));\n" if $do_setmagic;
1813 } elsif ($expr =~ /^\s*\$arg\s*=/) {
1814 # We expect that $arg has refcnt >=1, so we need
1815 # to mortalize it!
1816 eval "print qq\a$expr\a";
1817 warn $@ if $@;
1818 print "\tsv_2mortal(ST(0));\n";
1819 print "\tSvSETMAGIC(ST(0));\n" if $do_setmagic;
1820 } else {
1821 # Just hope that the entry would safely write it
1822 # over an already mortalized value. By
1823 # coincidence, something like $arg = &sv_undef
1824 # works too.
1825 print "\tST(0) = sv_newmortal();\n";
1826 eval "print qq\a$expr\a";
1827 warn $@ if $@;
1828 # new mortals don't have set magic
1829 }
1830 } elsif ($do_push) {
1831 print "\tPUSHs(sv_newmortal());\n";
1832 $arg = "ST($num)";
1833 eval "print qq\a$expr\a";
1834 warn $@ if $@;
1835 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1836 } elsif ($arg =~ /^ST\(\d+\)$/) {
1837 eval "print qq\a$expr\a";
1838 warn $@ if $@;
1839 print "\tSvSETMAGIC($arg);\n" if $do_setmagic;
1840 }
1841 }
1842}
1843
1844sub map_type {
1845 my($type, $varname) = @_;
1846
1847 # C++ has :: in types too so skip this
1848 $type =~ tr/:/_/ unless $hiertype;
1849 $type =~ s/^array\(([^,]*),(.*)\).*/$1 */s;
1850 if ($varname) {
1851 if ($varname && $type =~ / \( \s* \* (?= \s* \) ) /xg) {
1852 (substr $type, pos $type, 0) = " $varname ";
1853 } else {
1854 $type .= "\t$varname";
1855 }
1856 }
1857 $type;
1858}
1859
1860
1861#########################################################
1862package
1863 ExtUtils::ParseXS::CountLines;
1864use strict;
1865use vars qw($SECTION_END_MARKER);
1866
1867sub TIEHANDLE {
1868 my ($class, $cfile, $fh) = @_;
1869 $cfile =~ s/\\/\\\\/g;
1870 $SECTION_END_MARKER = qq{#line --- "$cfile"};
1871
1872 return bless {buffer => '',
1873 fh => $fh,
1874 line_no => 1,
1875 }, $class;
1876}
1877
1878sub PRINT {
1879 my $self = shift;
1880 for (@_) {
1881 $self->{buffer} .= $_;
1882 while ($self->{buffer} =~ s/^([^\n]*\n)//) {
1883 my $line = $1;
1884 ++ $self->{line_no};
1885 $line =~ s|^\#line\s+---(?=\s)|#line $self->{line_no}|;
1886 print {$self->{fh}} $line;
1887 }
1888 }
1889}
1890
1891sub PRINTF {
1892 my $self = shift;
1893 my $fmt = shift;
1894 $self->PRINT(sprintf($fmt, @_));
1895}
1896
1897sub DESTROY {
1898 # Not necessary if we're careful to end with a "\n"
1899 my $self = shift;
1900 print {$self->{fh}} $self->{buffer};
1901}
1902
1903sub UNTIE {
2f47ab8e 1904 # This sub does nothing, but is neccessary for references to be released.
6b09c160
YST		 1905}
1906
1907sub end_marker {
1908 return $SECTION_END_MARKER;
1909}
1910
1911
19121;
1913__END__
1914
1915=head1 NAME
1916
1917ExtUtils::ParseXS - converts Perl XS code into C code
1918
1919=head1 SYNOPSIS
1920
1921 use ExtUtils::ParseXS qw(process_file);
1922
1923 process_file( filename => 'foo.xs' );
1924
1925 process_file( filename => 'foo.xs',
1926 output => 'bar.c',
1927 'C++' => 1,
1928 typemap => 'path/to/typemap',
1929 hiertype => 1,
1930 except => 1,
1931 prototypes => 1,
1932 versioncheck => 1,
1933 linenumbers => 1,
1934 optimize => 1,
1935 prototypes => 1,
1936 );
1937=head1 DESCRIPTION
1938
1939C<ExtUtils::ParseXS> will compile XS code into C code by embedding the constructs
1940necessary to let C functions manipulate Perl values and creates the glue
1941necessary to let Perl access those functions. The compiler uses typemaps to
1942determine how to map C function parameters and variables to Perl values.
1943
1944The compiler will search for typemap files called I<typemap>. It will use
1945the following search path to find default typemaps, with the rightmost
1946typemap taking precedence.
1947
1948 ../../../typemap:../../typemap:../typemap:typemap
1949
1950=head1 EXPORT
1951
1952None by default. C<process_file()> may be exported upon request.
1953
1954
1955=head1 FUNCTIONS
1956
1957=over 4
1958
1959=item process_xs()
1960
1961This function processes an XS file and sends output to a C file.
1962Named parameters control how the processing is done. The following
1963parameters are accepted:
1964
1965=over 4
1966
1967=item B<C++>
1968
1969Adds C<extern "C"> to the C code. Default is false.
1970
1971=item B<hiertype>
1972
2f47ab8e 1973Retains C<::> in type names so that C++ hierachical types can be
6b09c160
YST		 1974mapped. Default is false.
1975
1976=item B<except>
1977
1978Adds exception handling stubs to the C code. Default is false.
1979
1980=item B<typemap>
1981
1982Indicates that a user-supplied typemap should take precedence over the
1983default typemaps. A single typemap may be specified as a string, or
1984multiple typemaps can be specified in an array reference, with the
1985last typemap having the highest precedence.
1986
1987=item B<prototypes>
1988
1989Generates prototype code for all xsubs. Default is false.
1990
1991=item B<versioncheck>
1992
1993Makes sure at run time that the object file (derived from the C<.xs>
1994file) and the C<.pm> files have the same version number. Default is
1995true.
1996
1997=item B<linenumbers>
1998
1999Adds C<#line> directives to the C output so error messages will look
2000like they came from the original XS file. Default is true.
2001
2002=item B<optimize>
2003
2004Enables certain optimizations. The only optimization that is currently
2005affected is the use of I<target>s by the output C code (see L<perlguts>).
2006Not optimizing may significantly slow down the generated code, but this is the way
2007B<xsubpp> of 5.005 and earlier operated. Default is to optimize.
2008
2009=item B<inout>
2010
2011Enable recognition of C<IN>, C<OUT_LIST> and C<INOUT_LIST>
2012declarations. Default is true.
2013
2014=item B<argtypes>
2015
2016Enable recognition of ANSI-like descriptions of function signature.
2017Default is true.
2018
2019=item B<s>
2020
2021I have no clue what this does. Strips function prefixes?
2022
2023=back
2024
2025=item errors()
2026
2027This function returns the number of [a certain kind of] errors
2028encountered during processing of the XS file.
2029
2030=back
2031
2032=head1 AUTHOR
2033
2034Based on xsubpp code, written by Larry Wall.
2035
2036Maintained by Ken Williams, <ken@mathforum.org>
2037
2038=head1 COPYRIGHT
2039
2040Copyright 2002-2003 Ken Williams. All rights reserved.
2041
2042This library is free software; you can redistribute it and/or
2043modify it under the same terms as Perl itself.
2044
2045Based on the ExtUtils::xsubpp code by Larry Wall and the Perl 5
2046Porters, which was released under the same license terms.
2047
2048=head1 SEE ALSO
2049
2050L<perl>, ExtUtils::xsubpp, ExtUtils::MakeMaker, L<perlxs>, L<perlxstut>.
2051
2052=cut
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