3 # Unconditionally regenerate:
8 # from information stored in
11 # plus all the .c and .h files listed in MANIFEST
13 # Has an optional arg, which is the directory to chdir to before reading
14 # MANIFEST and *.[ch].
16 # This script is invoked as part of 'make all'
18 # '=head1' are the only headings looked for. If the first non-blank line after
19 # the heading begins with a word character, it is considered to be the first
20 # line of documentation that applies to the heading itself. That is, it is
21 # output immediately after the heading, before the first function, and not
22 # indented. The next input line that is a pod directive terminates this
23 # heading-level documentation.
30 or die "Couldn't chdir to '$workdir': $!";
32 require './regen/regen_lib.pl';
33 require './regen/embed_lib.pl';
36 # See database of global and static function prototypes in embed.fnc
37 # This is used to generate prototype headers under various configurations,
38 # export symbols lists for different platforms, and macros to provide an
39 # implicit interpreter context argument.
52 my $curheader = "Unknown section";
54 sub autodoc ($$) { # parse a file and extract documentation info
56 my($in, $doc, $line, $header_doc);
59 my $get_next_line = sub { $line++; return <$fh> };
62 while (defined($in = $get_next_line->())) {
63 if ($in =~ /^#\s*define\s+([A-Za-z_][A-Za-z_0-9]+)\(/ &&
64 ($file ne 'embed.h' || $file ne 'proto.h')) {
68 if ($in=~ /^=head1 (.*)/) {
71 # If the next non-space line begins with a word char, then it is
72 # the start of heading-ldevel documentation.
73 if (defined($doc = $get_next_line->())) {
74 # Skip over empty lines
75 while ($doc =~ /^\s+$/) {
76 if (! defined($doc = $get_next_line->())) {
87 # Continue getting the heading-level documentation until read
88 # in any pod directive (or as a fail-safe, find a closing
89 # comment to this pod in a C language file
91 while (defined($doc = $get_next_line->())) {
97 if ($doc =~ m:^\s*\*/$:) {
98 warn "=cut missing? $file:$line:$doc";;
106 if ($in =~ /^=for\s+apidoc\s+(.*?)\s*\n/) {
108 $proto = "||$proto" unless $proto =~ /\|/;
109 my($flags, $ret, $name, @args) = split /\|/, $proto;
112 while (defined($doc = $get_next_line->())) {
114 # Other pod commands are considered part of the current
115 # function's docs, so can have lists, etc.
116 last DOC if $doc =~ /^=(cut|for\s+apidoc|head)/;
117 if ($doc =~ m:^\*/$:) {
118 warn "=cut missing? $file:$line:$doc";;
123 $docs = "\n$docs" if $docs and $docs !~ /^\n/;
125 # Check the consistency of the flags
126 my ($embed_where, $inline_where);
127 my ($embed_may_change, $inline_may_change);
129 my $docref = delete $funcflags{$name};
130 if ($docref and %$docref) {
131 $embed_where = $docref->{flags} =~ /A/ ? 'api' : 'guts';
132 $embed_may_change = $docref->{flags} =~ /M/;
133 $flags .= 'D' if $docref->{flags} =~ /D/;
135 $missing{$name} = $file;
138 $inline_where = $flags =~ /A/ ? 'api' : 'guts';
139 $inline_may_change = $flags =~ /x/;
141 if (defined $embed_where && $inline_where ne $embed_where) {
142 warn "Function '$name' inconsistency: embed.fnc says $embed_where, Pod says $inline_where";
145 if (defined $embed_may_change
146 && $inline_may_change ne $embed_may_change) {
147 my $message = "Function '$name' inconsistency: ";
148 if ($embed_may_change) {
149 $message .= "embed.fnc says 'may change', Pod does not";
151 $message .= "Pod says 'may change', embed.fnc does not";
155 } elsif (!defined $embed_where) {
156 warn "Unable to place $name!\n";
159 $inline_where = $embed_where;
160 $flags .= 'x' if $embed_may_change;
161 @args = @{$docref->{args}};
162 $ret = $docref->{retval};
165 if (exists $docs{$inline_where}{$curheader}{$name}) {
166 warn "$0: duplicate API entry for '$name' in $inline_where/$curheader\n";
169 $docs{$inline_where}{$curheader}{$name}
170 = [$flags, $docs, $ret, $file, @args];
172 # Create a special entry with an empty-string name for the
173 # heading-level documentation.
174 if (defined $header_doc) {
175 $docs{$inline_where}{$curheader}{""} = $header_doc;
180 if ($doc =~ /^=(?:for|head)/) {
185 warn "$file:$line:$in";
191 sub docout ($$$) { # output the docs for one function
192 my($fh, $name, $docref) = @_;
193 my($flags, $docs, $ret, $file, @args) = @$docref;
197 $docs = "\n\nDEPRECATED! It is planned to remove this function from a
198 future release of Perl. Do not use it for new code; remove it from
199 existing code.\n\n$docs";
202 $docs = "\n\nNOTE: this function is experimental and may change or be
203 removed without notice.\n\n$docs" if $flags =~ /x/;
205 $docs .= "NOTE: the perl_ form of this function is deprecated.\n\n"
207 $docs .= "NOTE: this function must be explicitly called as Perl_$name with an aTHX_ parameter.\n\n"
210 print $fh "=item $name\nX<$name>\n$docs";
212 if ($flags =~ /U/) { # no usage
214 } elsif ($flags =~ /s/) { # semicolon ("dTHR;")
215 print $fh "\t\t$name;\n\n";
216 } elsif ($flags =~ /n/) { # no args
217 print $fh "\t$ret\t$name\n\n";
218 } else { # full usage
219 my $p = $flags =~ /o/; # no #define foo Perl_foo
220 my $n = "Perl_"x$p . $name;
221 my $large_ret = length $ret > 7;
222 my $indent_size = 7+8 # nroff: 7 under =head + 8 under =item
223 +8+($large_ret ? 1 + length $ret : 8)
226 print $fh "\t$ret" . ($large_ret ? ' ' : "\t") . "$n(";
229 if ($indent_size + 2 + length > 79) {
231 $indent_size -= length($n) - 3;
237 $args = @args ? "pTHX_ " : "pTHX";
238 if ($long_args) { print $fh $args; $args = '' }
240 $long_args and print $fh "\n";
241 my $first = !$long_args;
245 && $indent_size + 3 + length($args[0]) + length $args > 79
250 "\t".($large_ret ? " " x (1+length $ret) : "\t")
251 ." "x($long_args ? 4 : 1 + length $n)
253 $args, (","x($args ne 'pTHX_ ') . "\n")x!!@args;
257 $args .= ", "x!!(length $args && $args ne 'pTHX_ ')
260 if ($long_args) { print $fh "\n", substr $indent, 0, -4 }
263 print $fh "=for hackers\nFound in file $file\n\n";
267 # Do a case-insensitive dictionary sort, with only alphabetics
268 # significant, falling back to using everything for determinancy
269 return (uc($a =~ s/[[:^alpha:]]//r) cmp uc($b =~ s/[[:^alpha:]]//r))
275 my ($podname, $header, $dochash, $missing, $footer) = @_;
276 my $fh = open_new("pod/$podname.pod", undef,
277 {by => "$0 extracting documentation",
278 from => 'the C source files'}, 1);
283 for $key (sort sort_helper keys %$dochash) {
284 my $section = $dochash->{$key};
285 print $fh "\n=head1 $key\n\n";
287 # Output any heading-level documentation and delete so won't get in
289 if (exists $section->{""}) {
290 print $fh $section->{""} . "\n";
291 delete $section->{""};
293 print $fh "=over 8\n\n";
295 for my $key (sort sort_helper keys %$section) {
296 docout($fh, $key, $section->{$key});
298 print $fh "\n=back\n";
302 print $fh "\n=head1 Undocumented functions\n\n";
303 print $fh $podname eq 'perlapi' ? <<'_EOB_' : <<'_EOB_';
304 The following functions have been flagged as part of the public API,
305 but are currently undocumented. Use them at your own risk, as the
306 interfaces are subject to change. Functions that are not listed in this
307 document are not intended for public use, and should NOT be used under any
310 If you feel you need to use one of these functions, first send email to
311 L<perl5-porters@perl.org|mailto:perl5-porters@perl.org>. It may be
312 that there is a good reason for the function not being documented, and it
313 should be removed from this list; or it may just be that no one has gotten
314 around to documenting it. In the latter case, you will be asked to submit a
315 patch to document the function. Once your patch is accepted, it will indicate
316 that the interface is stable (unless it is explicitly marked otherwise) and
322 The following functions are currently undocumented. If you use one of
323 them, you may wish to consider creating and submitting documentation for
329 for my $missing (sort @$missing) {
330 print $fh "=item $missing\nX<$missing>\n\n";
332 print $fh "=back\n\n";
334 print $fh $footer, "=cut\n";
336 read_only_bottom_close_and_rename($fh);
339 foreach (@{(setup_embed())[0]}) {
341 my ($flags, $retval, $func, @args) = @$_;
342 s/\b(?:NN|NULLOK)\b\s+//g for @args;
344 $funcflags{$func} = {
351 # glob() picks up docs from extra .c or .h files that may be in unclean
353 open my $fh, '<', 'MANIFEST'
354 or die "Can't open MANIFEST: $!";
355 while (my $line = <$fh>) {
356 next unless my ($file) = $line =~ /^(\S+\.[ch])\t/;
358 open F, '<', $file or die "Cannot open $file for docs: $!\n";
359 $curheader = "Functions in file $file\n";
361 close F or die "Error closing $file: $!\n";
363 close $fh or die "Error whilst reading MANIFEST: $!";
365 for (sort keys %funcflags) {
366 next unless $funcflags{$_}{flags} =~ /d/;
367 warn "no docs for $_\n"
370 foreach (sort keys %missing) {
372 # Heuristics for known not-a-function macros:
376 warn "Function '$_', documented in $missing{$_}, not listed in embed.fnc";
379 # walk table providing an array of components in each line to
380 # subroutine, printing the result
382 # List of funcs in the public API that aren't also marked as experimental nor
384 my @missing_api = grep $funcflags{$_}{flags} =~ /A/ && $funcflags{$_}{flags} !~ /[MD]/ && !$docs{api}{$_}, keys %funcflags;
385 output('perlapi', <<'_EOB_', $docs{api}, \@missing_api, <<'_EOE_');
390 perlapi - autogenerated documentation for the perl public API
393 X<Perl API> X<API> X<api>
395 This file contains the documentation of the perl public API generated by
396 F<embed.pl>, specifically a listing of functions, macros, flags, and variables
397 that may be used by extension writers. L<At the end|/Undocumented functions>
398 is a list of functions which have yet to be documented. The interfaces of
399 those are subject to change without notice. Anything not listed here is
400 not part of the public API, and should not be used by extension writers at
401 all. For these reasons, blindly using functions listed in proto.h is to be
402 avoided when writing extensions.
404 In Perl, unlike C, a string of characters may generally contain embedded
405 C<NUL> characters. Sometimes in the documentation a Perl string is referred
406 to as a "buffer" to distinguish it from a C string, but sometimes they are
407 both just referred to as strings.
409 Note that all Perl API global variables must be referenced with the C<PL_>
410 prefix. Again, those not listed here are not to be used by extension writers,
411 and can be changed or removed without notice; same with macros.
412 Some macros are provided for compatibility with the older,
413 unadorned names, but this support may be disabled in a future release.
415 Perl was originally written to handle US-ASCII only (that is characters
416 whose ordinal numbers are in the range 0 - 127).
417 And documentation and comments may still use the term ASCII, when
418 sometimes in fact the entire range from 0 - 255 is meant.
420 The non-ASCII characters below 256 can have various meanings, depending on
421 various things. (See, most notably, L<perllocale>.) But usually the whole
422 range can be referred to as ISO-8859-1. Often, the term "Latin-1" (or
423 "Latin1") is used as an equivalent for ISO-8859-1. But some people treat
424 "Latin1" as referring just to the characters in the range 128 through 255, or
425 somethimes from 160 through 255.
426 This documentation uses "Latin1" and "Latin-1" to refer to all 256 characters.
428 Note that Perl can be compiled and run under either ASCII or EBCDIC (See
429 L<perlebcdic>). Most of the documentation (and even comments in the code)
430 ignore the EBCDIC possibility.
431 For almost all purposes the differences are transparent.
432 As an example, under EBCDIC,
433 instead of UTF-8, UTF-EBCDIC is used to encode Unicode strings, and so
434 whenever this documentation refers to C<utf8>
435 (and variants of that name, including in function names),
436 it also (essentially transparently) means C<UTF-EBCDIC>.
437 But the ordinals of characters differ between ASCII, EBCDIC, and
438 the UTF- encodings, and a string encoded in UTF-EBCDIC may occupy a different
439 number of bytes than in UTF-8.
441 The listing below is alphabetical, case insensitive.
447 Until May 1997, this document was maintained by Jeff Okamoto
448 <okamoto@corp.hp.com>. It is now maintained as part of Perl itself.
450 With lots of help and suggestions from Dean Roehrich, Malcolm Beattie,
451 Andreas Koenig, Paul Hudson, Ilya Zakharevich, Paul Marquess, Neil
452 Bowers, Matthew Green, Tim Bunce, Spider Boardman, Ulrich Pfeifer,
453 Stephen McCamant, and Gurusamy Sarathy.
455 API Listing originally by Dean Roehrich <roehrich@cray.com>.
457 Updated to be autogenerated from comments in the source by Benjamin Stuhl.
461 L<perlguts>, L<perlxs>, L<perlxstut>, L<perlintern>
465 # List of non-static internal functions
467 grep $funcflags{$_}{flags} !~ /[As]/ && !$docs{guts}{$_}, keys %funcflags;
469 output('perlintern', <<'END', $docs{guts}, \@missing_guts, <<'END');
472 perlintern - autogenerated documentation of purely B<internal>
476 X<internal Perl functions> X<interpreter functions>
478 This file is the autogenerated documentation of functions in the
479 Perl interpreter that are documented using Perl's internal documentation
480 format but are not marked as part of the Perl API. In other words,
481 B<they are not for use in extensions>!
487 The autodocumentation system was originally added to the Perl core by
488 Benjamin Stuhl. Documentation is by whoever was kind enough to
489 document their functions.
493 L<perlguts>, L<perlapi>