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 next line after the
19 # heading begins with a word character, it is considered to be the first line
20 # of documentation that applies to the heading itself. That is, it is output
21 # immediately after the heading, before the first function, and not indented.
22 # The next input line that is a pod directive terminates this heading-level
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, $header_doc);
58 while (defined($in = <$fh>)) {
59 if ($in =~ /^#\s*define\s+([A-Za-z_][A-Za-z_0-9]+)\(/ &&
60 ($file ne 'embed.h' || $file ne 'proto.h')) {
64 if ($in=~ /^=head1 (.*)/) {
67 # If the next line begins with a word char, then is the start of
68 # heading-level documentation.
69 if (defined($doc = <$fh>)) {
77 # Continue getting the heading-level documentation until read
78 # in any pod directive (or as a fail-safe, find a closing
79 # comment to this pod in a C language file
81 while (defined($doc = <$fh>)) {
88 if ($doc =~ m:^\s*\*/$:) {
89 warn "=cut missing? $file:$line:$doc";;
98 if ($in =~ /^=for\s+apidoc\s+(.*?)\s*\n/) {
100 $proto = "||$proto" unless $proto =~ /\|/;
101 my($flags, $ret, $name, @args) = split /\|/, $proto;
104 while (defined($doc = <$fh>)) {
106 last DOC if $doc =~ /^=\w+/;
107 if ($doc =~ m:^\*/$:) {
108 warn "=cut missing? $file:$line:$doc";;
113 $docs = "\n$docs" if $docs and $docs !~ /^\n/;
115 # Check the consistency of the flags
116 my ($embed_where, $inline_where);
117 my ($embed_may_change, $inline_may_change);
119 my $docref = delete $funcflags{$name};
120 if ($docref and %$docref) {
121 $embed_where = $docref->{flags} =~ /A/ ? 'api' : 'guts';
122 $embed_may_change = $docref->{flags} =~ /M/;
123 $flags .= 'D' if $docref->{flags} =~ /D/;
125 $missing{$name} = $file;
128 $inline_where = $flags =~ /A/ ? 'api' : 'guts';
129 $inline_may_change = $flags =~ /x/;
131 if (defined $embed_where && $inline_where ne $embed_where) {
132 warn "Function '$name' inconsistency: embed.fnc says $embed_where, Pod says $inline_where";
135 if (defined $embed_may_change
136 && $inline_may_change ne $embed_may_change) {
137 my $message = "Function '$name' inconsistency: ";
138 if ($embed_may_change) {
139 $message .= "embed.fnc says 'may change', Pod does not";
141 $message .= "Pod says 'may change', embed.fnc does not";
145 } elsif (!defined $embed_where) {
146 warn "Unable to place $name!\n";
149 $inline_where = $embed_where;
150 $flags .= 'x' if $embed_may_change;
151 @args = @{$docref->{args}};
152 $ret = $docref->{retval};
155 $docs{$inline_where}{$curheader}{$name}
156 = [$flags, $docs, $ret, $file, @args];
158 # Create a special entry with an empty-string name for the
159 # heading-level documentation.
160 if (defined $header_doc) {
161 $docs{$inline_where}{$curheader}{""} = $header_doc;
166 if ($doc =~ /^=(?:for|head)/) {
171 warn "$file:$line:$in";
177 sub docout ($$$) { # output the docs for one function
178 my($fh, $name, $docref) = @_;
179 my($flags, $docs, $ret, $file, @args) = @$docref;
183 $docs = "\n\nDEPRECATED! It is planned to remove this function from a
184 future release of Perl. Do not use it for new code; remove it from
185 existing code.\n\n$docs";
188 $docs = "\n\nNOTE: this function is experimental and may change or be
189 removed without notice.\n\n$docs" if $flags =~ /x/;
191 $docs .= "NOTE: the perl_ form of this function is deprecated.\n\n"
193 $docs .= "NOTE: this function must be explicitly called as Perl_$name with an aTHX_ parameter.\n\n"
196 print $fh "=item $name\nX<$name>\n$docs";
198 if ($flags =~ /U/) { # no usage
200 } elsif ($flags =~ /s/) { # semicolon ("dTHR;")
201 print $fh "\t\t$name;\n\n";
202 } elsif ($flags =~ /n/) { # no args
203 print $fh "\t$ret\t$name\n\n";
204 } else { # full usage
205 my $p = $flags =~ /o/; # no #define foo Perl_foo
206 my $n = "Perl_"x$p . $name;
207 my $large_ret = length $ret > 7;
208 my $indent_size = 7+8 # nroff: 7 under =head + 8 under =item
209 +8+($large_ret ? 1 + length $ret : 8)
212 print $fh "\t$ret" . ($large_ret ? ' ' : "\t") . "$n(";
215 if ($indent_size + 2 + length > 79) {
217 $indent_size -= length($n) - 3;
223 $args = @args ? "pTHX_ " : "pTHX";
224 if ($long_args) { print $fh $args; $args = '' }
226 $long_args and print $fh "\n";
227 my $first = !$long_args;
231 && $indent_size + 3 + length($args[0]) + length $args > 79
236 "\t".($large_ret ? " " x (1+length $ret) : "\t")
237 ." "x($long_args ? 4 : 1 + length $n)
239 $args, (","x($args ne 'pTHX_ ') . "\n")x!!@args;
243 $args .= ", "x!!(length $args && $args ne 'pTHX_ ')
246 if ($long_args) { print $fh "\n", substr $indent, 0, -4 }
249 print $fh "=for hackers\nFound in file $file\n\n";
253 my ($podname, $header, $dochash, $missing, $footer) = @_;
254 my $fh = open_new("pod/$podname.pod", undef,
255 {by => "$0 extracting documentation",
256 from => 'the C source files'}, 1);
261 # case insensitive sort, with fallback for determinacy
262 for $key (sort { uc($a) cmp uc($b) || $a cmp $b } keys %$dochash) {
263 my $section = $dochash->{$key};
264 print $fh "\n=head1 $key\n\n";
266 # Output any heading-level documentation and delete so won't get in
268 if (exists $section->{""}) {
269 print $fh $section->{""} . "\n";
270 delete $section->{""};
272 print $fh "=over 8\n\n";
274 # Again, fallback for determinacy
275 for my $key (sort { uc($a) cmp uc($b) || $a cmp $b } keys %$section) {
276 docout($fh, $key, $section->{$key});
278 print $fh "\n=back\n";
282 print $fh "\n=head1 Undocumented functions\n\n";
283 print $fh $podname eq 'perlapi' ? <<'_EOB_' : <<'_EOB_';
284 The following functions have been flagged as part of the public API,
285 but are currently undocumented. Use them at your own risk, as the
286 interfaces are subject to change. Functions that are not listed in this
287 document are not intended for public use, and should NOT be used under any
290 If you use one of the undocumented functions below, you may wish to consider
291 creating and submitting documentation for it. If your patch is accepted, this
292 will indicate that the interface is stable (unless it is explicitly marked
298 The following functions are currently undocumented. If you use one of
299 them, you may wish to consider creating and submitting documentation for
305 for my $missing (sort @$missing) {
306 print $fh "=item $missing\nX<$missing>\n\n";
308 print $fh "=back\n\n";
310 print $fh $footer, "=cut\n";
312 read_only_bottom_close_and_rename($fh);
315 foreach (@{(setup_embed())[0]}) {
317 my ($flags, $retval, $func, @args) = @$_;
318 s/\b(?:NN|NULLOK)\b\s+//g for @args;
320 $funcflags{$func} = {
327 # glob() picks up docs from extra .c or .h files that may be in unclean
329 open my $fh, '<', 'MANIFEST'
330 or die "Can't open MANIFEST: $!";
331 while (my $line = <$fh>) {
332 next unless my ($file) = $line =~ /^(\S+\.[ch])\t/;
334 open F, "< $file" or die "Cannot open $file for docs: $!\n";
335 $curheader = "Functions in file $file\n";
337 close F or die "Error closing $file: $!\n";
339 close $fh or die "Error whilst reading MANIFEST: $!";
341 for (sort keys %funcflags) {
342 next unless $funcflags{$_}{flags} =~ /d/;
343 warn "no docs for $_\n"
346 foreach (sort keys %missing) {
348 # Heuristics for known not-a-function macros:
352 warn "Function '$_', documented in $missing{$_}, not listed in embed.fnc";
355 # walk table providing an array of components in each line to
356 # subroutine, printing the result
358 # List of funcs in the public API that aren't also marked as experimental nor
360 my @missing_api = grep $funcflags{$_}{flags} =~ /A/ && $funcflags{$_}{flags} !~ /[MD]/ && !$docs{api}{$_}, keys %funcflags;
361 output('perlapi', <<'_EOB_', $docs{api}, \@missing_api, <<'_EOE_');
364 perlapi - autogenerated documentation for the perl public API
367 X<Perl API> X<API> X<api>
369 This file contains the documentation of the perl public API generated by
370 F<embed.pl>, specifically a listing of functions, macros, flags, and variables
371 that may be used by extension writers. L<At the end|/Undocumented functions>
372 is a list of functions which have yet to be documented. The interfaces of
373 those are subject to change without notice. Any functions not listed here are
374 not part of the public API, and should not be used by extension writers at
375 all. For these reasons, blindly using functions listed in proto.h is to be
376 avoided when writing extensions.
378 Note that all Perl API global variables must be referenced with the C<PL_>
379 prefix. Some macros are provided for compatibility with the older,
380 unadorned names, but this support may be disabled in a future release.
382 Perl was originally written to handle US-ASCII only (that is characters
383 whose ordinal numbers are in the range 0 - 127).
384 And documentation and comments may still use the term ASCII, when
385 sometimes in fact the entire range from 0 - 255 is meant.
387 Note that Perl can be compiled and run under EBCDIC (See L<perlebcdic>)
388 or ASCII. Most of the documentation (and even comments in the code)
389 ignore the EBCDIC possibility.
390 For almost all purposes the differences are transparent.
391 As an example, under EBCDIC,
392 instead of UTF-8, UTF-EBCDIC is used to encode Unicode strings, and so
393 whenever this documentation refers to C<utf8>
394 (and variants of that name, including in function names),
395 it also (essentially transparently) means C<UTF-EBCDIC>.
396 But the ordinals of characters differ between ASCII, EBCDIC, and
397 the UTF- encodings, and a string encoded in UTF-EBCDIC may occupy more bytes
400 The listing below is alphabetical, case insensitive.
406 Until May 1997, this document was maintained by Jeff Okamoto
407 <okamoto@corp.hp.com>. It is now maintained as part of Perl itself.
409 With lots of help and suggestions from Dean Roehrich, Malcolm Beattie,
410 Andreas Koenig, Paul Hudson, Ilya Zakharevich, Paul Marquess, Neil
411 Bowers, Matthew Green, Tim Bunce, Spider Boardman, Ulrich Pfeifer,
412 Stephen McCamant, and Gurusamy Sarathy.
414 API Listing originally by Dean Roehrich <roehrich@cray.com>.
416 Updated to be autogenerated from comments in the source by Benjamin Stuhl.
420 L<perlguts>, L<perlxs>, L<perlxstut>, L<perlintern>
424 # List of non-static internal functions
426 grep $funcflags{$_}{flags} !~ /[As]/ && !$docs{guts}{$_}, keys %funcflags;
428 output('perlintern', <<'END', $docs{guts}, \@missing_guts, <<'END');
431 perlintern - autogenerated documentation of purely B<internal>
435 X<internal Perl functions> X<interpreter functions>
437 This file is the autogenerated documentation of functions in the
438 Perl interpreter that are documented using Perl's internal documentation
439 format but are not marked as part of the Perl API. In other words,
440 B<they are not for use in extensions>!
446 The autodocumentation system was originally added to the Perl core by
447 Benjamin Stuhl. Documentation is by whoever was kind enough to
448 document their functions.
452 L<perlguts>, L<perlapi>