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 normally invoked as part of 'make all', but is also
17 # called from from regen.pl.
22 # See database of global and static function prototypes in embed.fnc
23 # This is used to generate prototype headers under various configurations,
24 # export symbols lists for different platforms, and macros to provide an
25 # implicit interpreter context argument.
33 my $curheader = "Unknown section";
35 sub autodoc ($$) { # parse a file and extract documentation info
39 while (defined($in = <$fh>)) {
40 if ($in=~ /^=head1 (.*)/) {
45 if ($in =~ /^=for\s+apidoc\s+(.*?)\s*\n/) {
47 $proto = "||$proto" unless $proto =~ /\|/;
48 my($flags, $ret, $name, @args) = split /\|/, $proto;
51 while (defined($doc = <$fh>)) {
53 last DOC if $doc =~ /^=\w+/;
54 if ($doc =~ m:^\*/$:) {
55 warn "=cut missing? $file:$line:$doc";;
60 $docs = "\n$docs" if $docs and $docs !~ /^\n/;
63 $apidocs{$curheader}{$name} = [$flags, $docs, $ret, $file, @args];
66 $gutsdocs{$curheader}{$name} = [$flags, $docs, $ret, $file, @args];
70 $docfuncs{$name} = [$flags, $docs, $ret, $file, $curheader, @args];
72 $seenfuncs{$name} = 1;
74 if ($doc =~ /^=(?:for|head)/) {
79 warn "$file:$line:$in";
85 sub docout ($$$) { # output the docs for one function
86 my($fh, $name, $docref) = @_;
87 my($flags, $docs, $ret, $file, @args) = @$docref;
90 $docs .= "NOTE: this function is experimental and may change or be
91 removed without notice.\n\n" if $flags =~ /x/;
92 $docs .= "NOTE: the perl_ form of this function is deprecated.\n\n"
95 print $fh "=item $name\nX<$name>\n$docs";
97 if ($flags =~ /U/) { # no usage
99 } elsif ($flags =~ /s/) { # semicolon ("dTHR;")
100 print $fh "\t\t$name;\n\n";
101 } elsif ($flags =~ /n/) { # no args
102 print $fh "\t$ret\t$name\n\n";
103 } else { # full usage
104 print $fh "\t$ret\t$name";
105 print $fh "(" . join(", ", @args) . ")";
108 print $fh "=for hackers\nFound in file $file\n\n";
112 my ($podname, $header, $dochash, $footer) = @_;
113 my $filename = "pod/$podname.pod";
114 open my $fh, '>', $filename or die "Can't open $filename: $!";
116 print $fh <<"_EOH_", $header;
117 -*- buffer-read-only: t -*-
119 !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
120 This file is built by $0 extracting documentation from the C source
126 # case insensitive sort, with fallback for determinacy
127 for $key (sort { uc($a) cmp uc($b) || $a cmp $b } keys %$dochash) {
128 my $section = $dochash->{$key};
129 print $fh "\n=head1 $key\n\n=over 8\n\n";
130 # Again, fallback for determinacy
131 for my $key (sort { uc($a) cmp uc($b) || $a cmp $b } keys %$section) {
132 docout($fh, $key, $section->{$key});
134 print $fh "\n=back\n";
137 print $fh $footer, <<'_EOF_';
143 close $fh or die "Can't close $filename: $!";
149 or die "Couldn't chdir to '$workdir': $!";
153 # glob() picks up docs from extra .c or .h files that may be in unclean
157 open FH, "MANIFEST" or die "Can't open MANIFEST: $!";
161 for $file (($MANIFEST =~ /^(\S+\.c)\t/gm), ($MANIFEST =~ /^(\S+\.h)\t/gm)) {
162 open F, "< $file" or die "Cannot open $file for docs: $!\n";
163 $curheader = "Functions in file $file\n";
165 close F or die "Error closing $file: $!\n";
168 open IN, "embed.fnc" or die $!;
170 # walk table providing an array of components in each line to
171 # subroutine, printing the result
183 my ($flags, $retval, $func, @args) = split /\s*\|\s*/, $_;
185 next unless $flags =~ /d/;
188 s/\b(NN|NULLOK)\b\s+//g for @args;
189 $func =~ s/\t//g; # clean up fields from embed.pl
192 my $docref = delete $docfuncs{$func};
193 if ($docref and @$docref) {
195 $docref->[0].="x" if $flags =~ /M/;
196 $apidocs{$docref->[4]}{$func} =
197 [$docref->[0] . 'A', $docref->[1], $retval, $docref->[3],
200 $gutsdocs{$docref->[4]}{$func} =
201 [$docref->[0], $docref->[1], $retval, $docref->[3], @args];
205 warn "no docs for $func\n" unless $seenfuncs{$func};
209 for (sort keys %docfuncs) {
210 # Have you used a full for apidoc or just a func name?
211 # Have you used Ap instead of Am in the for apidoc?
212 warn "Unable to place $_!\n";
215 output('perlapi', <<'_EOB_', \%apidocs, <<'_EOE_');
218 perlapi - autogenerated documentation for the perl public API
221 X<Perl API> X<API> X<api>
223 This file contains the documentation of the perl public API generated by
224 embed.pl, specifically a listing of functions, macros, flags, and variables
225 that may be used by extension writers. The interfaces of any functions that
226 are not listed here are subject to change without notice. For this reason,
227 blindly using functions listed in proto.h is to be avoided when writing
230 Note that all Perl API global variables must be referenced with the C<PL_>
231 prefix. Some macros are provided for compatibility with the older,
232 unadorned names, but this support may be disabled in a future release.
234 Perl was originally written to handle US-ASCII only (that is characters
235 whose ordinal numbers are in the range 0 - 127).
236 And documentation and comments may still use the term ASCII, when
237 sometimes in fact the entire range from 0 - 255 is meant.
239 Note that Perl can be compiled and run under EBCDIC (See L<perlebcdic>)
240 or ASCII. Most of the documentation (and even comments in the code)
241 ignore the EBCDIC possibility.
242 For almost all purposes the differences are transparent.
243 As an example, under EBCDIC,
244 instead of UTF-8, UTF-EBCDIC is used to encode Unicode strings, and so
245 whenever this documentation refers to C<utf8>
246 (and variants of that name, including in function names),
247 it also (essentially transparently) means C<UTF-EBCDIC>.
248 But the ordinals of characters differ between ASCII, EBCDIC, and
249 the UTF- encodings, and a string encoded in UTF-EBCDIC may occupy more bytes
252 Also, on some EBCDIC machines, functions that are documented as operating on
253 US-ASCII (or Basic Latin in Unicode terminology) may in fact operate on all
254 256 characters in the EBCDIC range, not just the subset corresponding to
257 The listing below is alphabetical, case insensitive.
263 Until May 1997, this document was maintained by Jeff Okamoto
264 <okamoto@corp.hp.com>. It is now maintained as part of Perl itself.
266 With lots of help and suggestions from Dean Roehrich, Malcolm Beattie,
267 Andreas Koenig, Paul Hudson, Ilya Zakharevich, Paul Marquess, Neil
268 Bowers, Matthew Green, Tim Bunce, Spider Boardman, Ulrich Pfeifer,
269 Stephen McCamant, and Gurusamy Sarathy.
271 API Listing originally by Dean Roehrich <roehrich@cray.com>.
273 Updated to be autogenerated from comments in the source by Benjamin Stuhl.
277 perlguts(1), perlxs(1), perlxstut(1), perlintern(1)
281 output('perlintern', <<'END', \%gutsdocs, <<'END');
284 perlintern - autogenerated documentation of purely B<internal>
288 X<internal Perl functions> X<interpreter functions>
290 This file is the autogenerated documentation of functions in the
291 Perl interpreter that are documented using Perl's internal documentation
292 format but are not marked as part of the Perl API. In other words,
293 B<they are not for use in extensions>!
299 The autodocumentation system was originally added to the Perl core by
300 Benjamin Stuhl. Documentation is by whoever was kind enough to
301 document their functions.
305 perlguts(1), perlapi(1)