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 /\s*\|\s*/, $proto;
112 while (defined($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 $embed_docref = delete $funcflags{$name};
130 if ($embed_docref and %$embed_docref) {
131 $embed_where = $embed_docref->{flags} =~ /A/ ? 'api' : 'guts';
132 $embed_may_change = $embed_docref->{flags} =~ /x/;
133 $flags .= 'D' if $embed_docref->{flags} =~ /D/;
134 $flags .= 'O' if $embed_docref->{flags} =~ /O/;
135 $flags .= 'p' if $embed_docref->{flags} =~ /p/;
136 $flags .= 'M' if $embed_docref->{flags} =~ /M/;
137 $flags .= 'T' if $embed_docref->{flags} =~ /T/;
139 $missing{$name} = $file;
142 $inline_where = $flags =~ /A/ ? 'api' : 'guts';
143 $inline_may_change = $flags =~ /x/;
145 if (defined $embed_where && $inline_where ne $embed_where) {
146 warn "Function '$name' inconsistency: embed.fnc says $embed_where, Pod says $inline_where";
149 if (defined $embed_may_change
150 && $inline_may_change ne $embed_may_change) {
151 my $message = "Function '$name' inconsistency: ";
152 if ($embed_may_change) {
153 $message .= "embed.fnc says 'may change', Pod does not";
155 $message .= "Pod says 'may change', embed.fnc does not";
159 } elsif (!defined $embed_where) {
160 warn "Unable to place $name!\n";
163 $inline_where = $embed_where;
164 $flags .= 'x' if $embed_may_change;
165 @args = @{$embed_docref->{args}};
166 $ret = $embed_docref->{retval};
169 if (exists $docs{$inline_where}{$curheader}{$name}) {
170 warn "$0: duplicate API entry for '$name' in $inline_where/$curheader\n";
173 $docs{$inline_where}{$curheader}{$name}
174 = [$flags, $docs, $ret, $file, @args];
176 # Create a special entry with an empty-string name for the
177 # heading-level documentation.
178 if (defined $header_doc) {
179 $docs{$inline_where}{$curheader}{""} = $header_doc;
184 if ($doc =~ /^=(?:for|head)/) {
189 warn "$file:$line:$in";
195 sub docout ($$$) { # output the docs for one function
196 my($fh, $name, $docref) = @_;
197 my($flags, $docs, $ret, $file, @args) = @$docref;
201 $docs = "\n\nDEPRECATED! It is planned to remove this function from a
202 future release of Perl. Do not use it for new code; remove it from
203 existing code.\n\n$docs";
206 $docs = "\n\nNOTE: this function is experimental and may change or be
207 removed without notice.\n\n$docs" if $flags =~ /x/;
210 # Is Perl_, but no #define foo # Perl_foo
211 my $p = $flags =~ /p/ && $flags =~ /o/ && $flags !~ /M/;
213 $docs .= "NOTE: the perl_ form of this function is deprecated.\n\n"
216 $docs .= "NOTE: this function must be explicitly called as Perl_$name";
217 $docs .= " with an aTHX_ parameter" if $flags !~ /T/;
221 print $fh "=item $name\nX<$name>\n$docs";
223 if ($flags =~ /U/) { # no usage
224 warn("U and s flags are incompatible") if $flags =~ /s/;
227 if ($flags =~ /n/) { # no args
228 print $fh "\t$ret\t$name";
229 } else { # full usage
230 my $n = "Perl_"x$p . $name;
231 my $large_ret = length $ret > 7;
232 my $indent_size = 7+8 # nroff: 7 under =head + 8 under =item
233 +8+($large_ret ? 1 + length $ret : 8)
236 print $fh "\t$ret" . ($large_ret ? ' ' : "\t") . "$n(";
239 if ($indent_size + 2 + length > 79) {
241 $indent_size -= length($n) - 3;
246 if ($p && $flags !~ /T/) {
247 $args = @args ? "pTHX_ " : "pTHX";
248 if ($long_args) { print $fh $args; $args = '' }
250 $long_args and print $fh "\n";
251 my $first = !$long_args;
255 && $indent_size + 3 + length($args[0]) + length $args > 79
260 "\t".($large_ret ? " " x (1+length $ret) : "\t")
261 ." "x($long_args ? 4 : 1 + length $n)
263 $args, (","x($args ne 'pTHX_ ') . "\n")x!!@args;
267 $args .= ", "x!!(length $args && $args ne 'pTHX_ ')
270 if ($long_args) { print $fh "\n", substr $indent, 0, -4 }
273 print $fh ";" if $flags =~ /s/; # semicolon "dTHR;"
276 print $fh "=for hackers\nFound in file $file\n\n";
280 # Do a case-insensitive dictionary sort, with only alphabetics
281 # significant, falling back to using everything for determinancy
282 return (uc($a =~ s/[[:^alpha:]]//r) cmp uc($b =~ s/[[:^alpha:]]//r))
288 my ($podname, $header, $dochash, $missing, $footer) = @_;
290 # strip leading '|' from each line which had been used to hide
291 # pod from pod checkers.
292 s/^\|//gm for $header, $footer;
294 my $fh = open_new("pod/$podname.pod", undef,
295 {by => "$0 extracting documentation",
296 from => 'the C source files'}, 1);
301 for $key (sort sort_helper keys %$dochash) {
302 my $section = $dochash->{$key};
303 print $fh "\n=head1 $key\n\n";
305 # Output any heading-level documentation and delete so won't get in
307 if (exists $section->{""}) {
308 print $fh $section->{""} . "\n";
309 delete $section->{""};
311 print $fh "=over 8\n\n";
313 for my $key (sort sort_helper keys %$section) {
314 docout($fh, $key, $section->{$key});
316 print $fh "\n=back\n";
320 print $fh "\n=head1 Undocumented functions\n\n";
321 print $fh $podname eq 'perlapi' ? <<'_EOB_' : <<'_EOB_';
322 The following functions have been flagged as part of the public API,
323 but are currently undocumented. Use them at your own risk, as the
324 interfaces are subject to change. Functions that are not listed in this
325 document are not intended for public use, and should NOT be used under any
328 If you feel you need to use one of these functions, first send email to
329 L<perl5-porters@perl.org|mailto:perl5-porters@perl.org>. It may be
330 that there is a good reason for the function not being documented, and it
331 should be removed from this list; or it may just be that no one has gotten
332 around to documenting it. In the latter case, you will be asked to submit a
333 patch to document the function. Once your patch is accepted, it will indicate
334 that the interface is stable (unless it is explicitly marked otherwise) and
337 The following functions are currently undocumented. If you use one of
338 them, you may wish to consider creating and submitting documentation for
341 print $fh "\n=over\n\n";
343 for my $missing (sort @$missing) {
344 print $fh "=item $missing\nX<$missing>\n\n";
346 print $fh "=back\n\n";
348 print $fh $footer, "=cut\n";
350 read_only_bottom_close_and_rename($fh);
353 foreach (@{(setup_embed())[0]}) {
355 my ($flags, $retval, $func, @args) = @$_;
356 s/\b(?:NN|NULLOK)\b\s+//g for @args;
358 $funcflags{$func} = {
365 # glob() picks up docs from extra .c or .h files that may be in unclean
367 open my $fh, '<', 'MANIFEST'
368 or die "Can't open MANIFEST: $!";
369 while (my $line = <$fh>) {
370 next unless my ($file) = $line =~ /^(\S+\.[ch])\t/;
372 open F, '<', $file or die "Cannot open $file for docs: $!\n";
373 $curheader = "Functions in file $file\n";
375 close F or die "Error closing $file: $!\n";
377 close $fh or die "Error whilst reading MANIFEST: $!";
379 for (sort keys %funcflags) {
380 next unless $funcflags{$_}{flags} =~ /d/;
381 warn "no docs for $_\n"
384 foreach (sort keys %missing) {
386 # Heuristics for known not-a-function macros:
390 warn "Function '$_', documented in $missing{$_}, not listed in embed.fnc";
393 # walk table providing an array of components in each line to
394 # subroutine, printing the result
396 # List of funcs in the public API that aren't also marked as experimental nor
398 my @missing_api = grep $funcflags{$_}{flags} =~ /A/ && $funcflags{$_}{flags} !~ /[xD]/ && !$docs{api}{$_}, keys %funcflags;
399 output('perlapi', <<'_EOB_', $docs{api}, \@missing_api, <<'_EOE_');
404 |perlapi - autogenerated documentation for the perl public API
407 |X<Perl API> X<API> X<api>
409 |This file contains the documentation of the perl public API generated by
410 |F<embed.pl>, specifically a listing of functions, macros, flags, and variables
411 |that may be used by extension writers. L<At the end|/Undocumented functions>
412 |is a list of functions which have yet to be documented. The interfaces of
413 |those are subject to change without notice. Anything not listed here is
414 |not part of the public API, and should not be used by extension writers at
415 |all. For these reasons, blindly using functions listed in proto.h is to be
416 |avoided when writing extensions.
418 |In Perl, unlike C, a string of characters may generally contain embedded
419 |C<NUL> characters. Sometimes in the documentation a Perl string is referred
420 |to as a "buffer" to distinguish it from a C string, but sometimes they are
421 |both just referred to as strings.
423 |Note that all Perl API global variables must be referenced with the C<PL_>
424 |prefix. Again, those not listed here are not to be used by extension writers,
425 |and can be changed or removed without notice; same with macros.
426 |Some macros are provided for compatibility with the older,
427 |unadorned names, but this support may be disabled in a future release.
429 |Perl was originally written to handle US-ASCII only (that is characters
430 |whose ordinal numbers are in the range 0 - 127).
431 |And documentation and comments may still use the term ASCII, when
432 |sometimes in fact the entire range from 0 - 255 is meant.
434 |The non-ASCII characters below 256 can have various meanings, depending on
435 |various things. (See, most notably, L<perllocale>.) But usually the whole
436 |range can be referred to as ISO-8859-1. Often, the term "Latin-1" (or
437 |"Latin1") is used as an equivalent for ISO-8859-1. But some people treat
438 |"Latin1" as referring just to the characters in the range 128 through 255, or
439 |somethimes from 160 through 255.
440 |This documentation uses "Latin1" and "Latin-1" to refer to all 256 characters.
442 |Note that Perl can be compiled and run under either ASCII or EBCDIC (See
443 |L<perlebcdic>). Most of the documentation (and even comments in the code)
444 |ignore the EBCDIC possibility.
445 |For almost all purposes the differences are transparent.
446 |As an example, under EBCDIC,
447 |instead of UTF-8, UTF-EBCDIC is used to encode Unicode strings, and so
448 |whenever this documentation refers to C<utf8>
449 |(and variants of that name, including in function names),
450 |it also (essentially transparently) means C<UTF-EBCDIC>.
451 |But the ordinals of characters differ between ASCII, EBCDIC, and
452 |the UTF- encodings, and a string encoded in UTF-EBCDIC may occupy a different
453 |number of bytes than in UTF-8.
455 |The listing below is alphabetical, case insensitive.
461 |Until May 1997, this document was maintained by Jeff Okamoto
462 |<okamoto@corp.hp.com>. It is now maintained as part of Perl itself.
464 |With lots of help and suggestions from Dean Roehrich, Malcolm Beattie,
465 |Andreas Koenig, Paul Hudson, Ilya Zakharevich, Paul Marquess, Neil
466 |Bowers, Matthew Green, Tim Bunce, Spider Boardman, Ulrich Pfeifer,
467 |Stephen McCamant, and Gurusamy Sarathy.
469 |API Listing originally by Dean Roehrich <roehrich@cray.com>.
471 |Updated to be autogenerated from comments in the source by Benjamin Stuhl.
475 |L<perlguts>, L<perlxs>, L<perlxstut>, L<perlintern>
479 # List of non-static internal functions
481 grep $funcflags{$_}{flags} !~ /[AS]/ && !$docs{guts}{$_}, keys %funcflags;
483 output('perlintern', <<'END', $docs{guts}, \@missing_guts, <<'END');
486 |perlintern - autogenerated documentation of purely B<internal>
490 |X<internal Perl functions> X<interpreter functions>
492 |This file is the autogenerated documentation of functions in the
493 |Perl interpreter that are documented using Perl's internal documentation
494 |format but are not marked as part of the Perl API. In other words,
495 |B<they are not for use in extensions>!
501 |The autodocumentation system was originally added to the Perl core by
502 |Benjamin Stuhl. Documentation is by whoever was kind enough to
503 |document their functions.
507 |L<perlguts>, L<perlapi>