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.
25 # The meanings of the flags fields in embed.fnc and the source code is
26 # documented at the top of embed.fnc.
33 or die "Couldn't chdir to '$workdir': $!";
35 require './regen/regen_lib.pl';
36 require './regen/embed_lib.pl';
38 my @specialized_docs = sort qw( perlguts
44 my $other_places_api = join " ", map { "L<$_>" } sort @specialized_docs, 'perlintern';
45 my $other_places_intern = join " ", map { "L<$_>" } sort @specialized_docs, 'perlapi';
47 @specialized_docs = map { "L<$_>" } sort @specialized_docs;
48 $specialized_docs[-1] =~ s/^/and /;
49 my $specialized_docs = join ", ", @specialized_docs;
52 # See database of global and static function prototypes in embed.fnc
53 # This is used to generate prototype headers under various configurations,
54 # export symbols lists for different platforms, and macros to provide an
55 # implicit interpreter context argument.
62 my $curheader = "Unknown section";
64 sub autodoc ($$) { # parse a file and extract documentation info
66 my($in, $doc, $line, $header_doc);
69 my $get_next_line = sub { $line++; return <$fh> };
72 while (defined($in = $get_next_line->())) {
73 if ($in=~ /^=head1 (.*)/) {
76 # If the next non-space line begins with a word char, then it is
77 # the start of heading-level documentation.
78 if (defined($doc = $get_next_line->())) {
79 # Skip over empty lines
80 while ($doc =~ /^\s+$/) {
81 if (! defined($doc = $get_next_line->())) {
92 # Continue getting the heading-level documentation until read
93 # in any pod directive (or as a fail-safe, find a closing
94 # comment to this pod in a C language file
96 while (defined($doc = $get_next_line->())) {
102 if ($doc =~ m:^\s*\*/$:) {
103 warn "=cut missing? $file:$line:$doc";;
111 if ($in =~ /^=for\s+apidoc\s+(.*?)\s*\n/) {
112 my $proto_in_file = $1;
113 my $proto = $proto_in_file;
114 $proto = "||$proto" unless $proto =~ /\|/;
115 my($flags, $ret, $name, @args) = split /\s*\|\s*/, $proto;
117 Bad apidoc at $file line $.:
120 =for apidoc flags|returntype|name|arg|arg|...
121 =for apidoc flags|returntype|name
124 next FUNC if $flags =~ /h/;
126 warn ("'$name' not \\w+ in '$proto_in_file' in $file")
127 if $flags !~ /N/ && $name !~ / ^ [_[:alpha:]] \w* $ /x;
130 while (defined($doc = $get_next_line->())) {
132 # Other pod commands are considered part of the current
133 # function's docs, so can have lists, etc.
134 last DOC if $doc =~ /^=(cut|for\s+apidoc|head)/;
135 if ($doc =~ m:^\*/$:) {
136 warn "=cut missing? $file:$line:$doc";;
141 $docs = "\n$docs" if $docs and $docs !~ /^\n/;
143 # If the entry is also in embed.fnc, it should be defined
144 # completely there, but not here
145 my $embed_docref = delete $funcflags{$name};
146 if ($embed_docref and %$embed_docref) {
147 warn "embed.fnc entry overrides redundant information in"
148 . " '$proto_in_file' in $file" if $flags || $ret || @args;
149 $flags = $embed_docref->{'flags'};
150 warn "embed.fnc entry '$name' missing 'd' flag"
151 unless $flags =~ /d/;
152 next FUNC if $flags =~ /h/;
153 $ret = $embed_docref->{'retval'};
154 @args = @{$embed_docref->{args}};
155 } elsif ($flags !~ /m/) { # Not in embed.fnc, is missing if not a
157 $missing{$name} = $file;
160 my $inline_where = $flags =~ /A/ ? 'api' : 'guts';
162 if (exists $docs{$inline_where}{$curheader}{$name}) {
163 warn "$0: duplicate API entry for '$name' in $inline_where/$curheader\n";
166 $docs{$inline_where}{$curheader}{$name}
167 = [$flags, $docs, $ret, $file, @args];
169 # Create a special entry with an empty-string name for the
170 # heading-level documentation.
171 if (defined $header_doc) {
172 $docs{$inline_where}{$curheader}{""} = $header_doc;
177 if ($doc =~ /^=(?:for|head)/) {
182 warn "$file:$line:$in";
188 sub docout ($$$) { # output the docs for one function
189 my($fh, $name, $docref) = @_;
190 my($flags, $docs, $ret, $file, @args) = @$docref;
194 $docs = "\n\nDEPRECATED! It is planned to remove this function from a
195 future release of Perl. Do not use it for new code; remove it from
196 existing code.\n\n$docs";
199 $docs = "\n\nNOTE: this function is experimental and may change or be
200 removed without notice.\n\n$docs" if $flags =~ /x/;
203 # Is Perl_, but no #define foo # Perl_foo
204 my $p = $flags =~ /p/ && $flags =~ /o/ && $flags !~ /M/;
206 $docs .= "NOTE: the perl_ form of this function is deprecated.\n\n"
209 $docs .= "NOTE: this function must be explicitly called as Perl_$name";
210 $docs .= " with an aTHX_ parameter" if $flags !~ /T/;
214 print $fh "=item $name\nX<$name>\n$docs";
216 if ($flags =~ /U/) { # no usage
217 warn("U and s flags are incompatible") if $flags =~ /s/;
220 if ($flags =~ /n/) { # no args
221 warn("n flag without m") unless $flags =~ /m/;
222 warn("n flag but apparently has args") if @args;
223 print $fh "\t$ret\t$name";
224 } else { # full usage
225 my $n = "Perl_"x$p . $name;
226 my $large_ret = length $ret > 7;
227 my $indent_size = 7+8 # nroff: 7 under =head + 8 under =item
228 +8+($large_ret ? 1 + length $ret : 8)
231 print $fh "\t$ret" . ($large_ret ? ' ' : "\t") . "$n(";
234 if ($indent_size + 2 + length > 79) {
236 $indent_size -= length($n) - 3;
241 if ($p && $flags !~ /T/) {
242 $args = @args ? "pTHX_ " : "pTHX";
243 if ($long_args) { print $fh $args; $args = '' }
245 $long_args and print $fh "\n";
246 my $first = !$long_args;
250 && $indent_size + 3 + length($args[0]) + length $args > 79
255 "\t".($large_ret ? " " x (1+length $ret) : "\t")
256 ." "x($long_args ? 4 : 1 + length $n)
258 $args, (","x($args ne 'pTHX_ ') . "\n")x!!@args;
262 $args .= ", "x!!(length $args && $args ne 'pTHX_ ')
265 if ($long_args) { print $fh "\n", substr $indent, 0, -4 }
268 print $fh ";" if $flags =~ /s/; # semicolon "dTHR;"
271 print $fh "=for hackers\nFound in file $file\n\n";
275 # Do a case-insensitive dictionary sort, with only alphabetics
276 # significant, falling back to using everything for determinancy
277 return (uc($a =~ s/[[:^alpha:]]//r) cmp uc($b =~ s/[[:^alpha:]]//r))
283 my ($podname, $header, $dochash, $missing, $footer) = @_;
285 # strip leading '|' from each line which had been used to hide
286 # pod from pod checkers.
287 s/^\|//gm for $header, $footer;
289 my $fh = open_new("pod/$podname.pod", undef,
290 {by => "$0 extracting documentation",
291 from => 'the C source files'}, 1);
296 for $key (sort sort_helper keys %$dochash) {
297 my $section = $dochash->{$key};
298 print $fh "\n=head1 $key\n\n";
300 # Output any heading-level documentation and delete so won't get in
302 if (exists $section->{""}) {
303 print $fh $section->{""} . "\n";
304 delete $section->{""};
306 print $fh "=over 8\n\n";
308 for my $key (sort sort_helper keys %$section) {
309 docout($fh, $key, $section->{$key});
311 print $fh "\n=back\n";
315 print $fh "\n=head1 Undocumented functions\n\n";
316 print $fh $podname eq 'perlapi' ? <<'_EOB_' : <<'_EOB_';
317 The following functions have been flagged as part of the public API,
318 but are currently undocumented. Use them at your own risk, as the
319 interfaces are subject to change. Functions that are not listed in this
320 document are not intended for public use, and should NOT be used under any
323 If you feel you need to use one of these functions, first send email to
324 L<perl5-porters@perl.org|mailto:perl5-porters@perl.org>. It may be
325 that there is a good reason for the function not being documented, and it
326 should be removed from this list; or it may just be that no one has gotten
327 around to documenting it. In the latter case, you will be asked to submit a
328 patch to document the function. Once your patch is accepted, it will indicate
329 that the interface is stable (unless it is explicitly marked otherwise) and
332 The following functions are currently undocumented. If you use one of
333 them, you may wish to consider creating and submitting documentation for
336 print $fh "\n=over\n\n";
338 for my $missing (sort @$missing) {
339 print $fh "=item $missing\nX<$missing>\n\n";
341 print $fh "=back\n\n";
343 print $fh $footer, "=cut\n";
345 read_only_bottom_close_and_rename($fh);
348 foreach (@{(setup_embed())[0]}) {
350 my ($flags, $retval, $func, @args) = @$_;
351 s/\b(?:NN|NULLOK)\b\s+//g for @args;
353 $funcflags{$func} = {
360 # glob() picks up docs from extra .c or .h files that may be in unclean
362 open my $fh, '<', 'MANIFEST'
363 or die "Can't open MANIFEST: $!";
364 while (my $line = <$fh>) {
365 next unless my ($file) = $line =~ /^(\S+\.(?:[ch]|pod))\t/;
367 open F, '<', $file or die "Cannot open $file for docs: $!\n";
368 $curheader = "Functions in file $file\n";
370 close F or die "Error closing $file: $!\n";
372 close $fh or die "Error whilst reading MANIFEST: $!";
374 for (sort keys %funcflags) {
375 next unless $funcflags{$_}{flags} =~ /d/;
376 next if $funcflags{$_}{flags} =~ /h/;
377 warn "no docs for $_\n"
380 foreach (sort keys %missing) {
381 warn "Function '$_', documented in $missing{$_}, not listed in embed.fnc";
384 # walk table providing an array of components in each line to
385 # subroutine, printing the result
387 # List of funcs in the public API that aren't also marked as experimental nor
389 my @missing_api = grep $funcflags{$_}{flags} =~ /A/
390 && $funcflags{$_}{flags} !~ /[xD]/
391 && !$docs{api}{$_}, keys %funcflags;
392 output('perlapi', <<"_EOB_", $docs{api}, \@missing_api, <<"_EOE_");
397 |perlapi - autogenerated documentation for the perl public API
400 |X<Perl API> X<API> X<api>
402 |This file contains most of the documentation of the perl public API, as
403 |generated by F<embed.pl>. Specifically, it is a listing of functions,
404 |macros, flags, and variables that may be used by extension writers. Some
405 |specialized items are instead documented in $specialized_docs.
407 |L<At the end|/Undocumented functions> is a list of functions which have yet
408 |to be documented. Patches welcome! The interfaces of these are subject to
409 |change without notice.
411 |Anything not listed here is not part of the public API, and should not be
412 |used by extension writers at all. For these reasons, blindly using functions
413 |listed in proto.h is to be avoided when writing extensions.
415 |In Perl, unlike C, a string of characters may generally contain embedded
416 |C<NUL> characters. Sometimes in the documentation a Perl string is referred
417 |to as a "buffer" to distinguish it from a C string, but sometimes they are
418 |both just referred to as strings.
420 |Note that all Perl API global variables must be referenced with the C<PL_>
421 |prefix. Again, those not listed here are not to be used by extension writers,
422 |and can be changed or removed without notice; same with macros.
423 |Some macros are provided for compatibility with the older,
424 |unadorned names, but this support may be disabled in a future release.
426 |Perl was originally written to handle US-ASCII only (that is characters
427 |whose ordinal numbers are in the range 0 - 127).
428 |And documentation and comments may still use the term ASCII, when
429 |sometimes in fact the entire range from 0 - 255 is meant.
431 |The non-ASCII characters below 256 can have various meanings, depending on
432 |various things. (See, most notably, L<perllocale>.) But usually the whole
433 |range can be referred to as ISO-8859-1. Often, the term "Latin-1" (or
434 |"Latin1") is used as an equivalent for ISO-8859-1. But some people treat
435 |"Latin1" as referring just to the characters in the range 128 through 255, or
436 |somethimes from 160 through 255.
437 |This documentation uses "Latin1" and "Latin-1" to refer to all 256 characters.
439 |Note that Perl can be compiled and run under either ASCII or EBCDIC (See
440 |L<perlebcdic>). Most of the documentation (and even comments in the code)
441 |ignore the EBCDIC possibility.
442 |For almost all purposes the differences are transparent.
443 |As an example, under EBCDIC,
444 |instead of UTF-8, UTF-EBCDIC is used to encode Unicode strings, and so
445 |whenever this documentation refers to C<utf8>
446 |(and variants of that name, including in function names),
447 |it also (essentially transparently) means C<UTF-EBCDIC>.
448 |But the ordinals of characters differ between ASCII, EBCDIC, and
449 |the UTF- encodings, and a string encoded in UTF-EBCDIC may occupy a different
450 |number of bytes than in UTF-8.
452 |The listing below is alphabetical, case insensitive.
458 |Until May 1997, this document was maintained by Jeff Okamoto
459 |<okamoto\@corp.hp.com>. It is now maintained as part of Perl itself.
461 |With lots of help and suggestions from Dean Roehrich, Malcolm Beattie,
462 |Andreas Koenig, Paul Hudson, Ilya Zakharevich, Paul Marquess, Neil
463 |Bowers, Matthew Green, Tim Bunce, Spider Boardman, Ulrich Pfeifer,
464 |Stephen McCamant, and Gurusamy Sarathy.
466 |API Listing originally by Dean Roehrich <roehrich\@cray.com>.
468 |Updated to be autogenerated from comments in the source by Benjamin Stuhl.
475 # List of non-static internal functions
477 grep $funcflags{$_}{flags} !~ /[AS]/ && !$docs{guts}{$_}, keys %funcflags;
479 output('perlintern', <<'_EOB_', $docs{guts}, \@missing_guts, <<"_EOE_");
482 |perlintern - autogenerated documentation of purely B<internal>
486 |X<internal Perl functions> X<interpreter functions>
488 |This file is the autogenerated documentation of functions in the
489 |Perl interpreter that are documented using Perl's internal documentation
490 |format but are not marked as part of the Perl API. In other words,
491 |B<they are not for use in extensions>!
497 |The autodocumentation system was originally added to the Perl core by
498 |Benjamin Stuhl. Documentation is by whoever was kind enough to
499 |document their functions.