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.
32 my $curheader = "Unknown section";
34 sub autodoc ($$) { # parse a file and extract documentation info
38 while (defined($in = <$fh>)) {
39 if ($in=~ /^=head1 (.*)/) {
44 if ($in =~ /^=for\s+apidoc\s+(.*?)\s*\n/) {
46 $proto = "||$proto" unless $proto =~ /\|/;
47 my($flags, $ret, $name, @args) = split /\|/, $proto;
50 while (defined($doc = <$fh>)) {
52 last DOC if $doc =~ /^=\w+/;
53 if ($doc =~ m:^\*/$:) {
54 warn "=cut missing? $file:$line:$doc";;
59 $docs = "\n$docs" if $docs and $docs !~ /^\n/;
62 $docs{api}{$curheader}{$name} = [$flags, $docs, $ret, $file, @args];
65 $docs{guts}{$curheader}{$name} = [$flags, $docs, $ret, $file, @args];
69 $docfuncs{$name} = [$flags, $docs, $ret, $file, $curheader, @args];
71 $seenfuncs{$name} = 1;
73 if ($doc =~ /^=(?:for|head)/) {
78 warn "$file:$line:$in";
84 sub docout ($$$) { # output the docs for one function
85 my($fh, $name, $docref) = @_;
86 my($flags, $docs, $ret, $file, @args) = @$docref;
89 $docs .= "NOTE: this function is experimental and may change or be
90 removed without notice.\n\n" if $flags =~ /x/;
91 $docs .= "NOTE: the perl_ form of this function is deprecated.\n\n"
94 print $fh "=item $name\nX<$name>\n$docs";
96 if ($flags =~ /U/) { # no usage
98 } elsif ($flags =~ /s/) { # semicolon ("dTHR;")
99 print $fh "\t\t$name;\n\n";
100 } elsif ($flags =~ /n/) { # no args
101 print $fh "\t$ret\t$name\n\n";
102 } else { # full usage
103 print $fh "\t$ret\t$name";
104 print $fh "(" . join(", ", @args) . ")";
107 print $fh "=for hackers\nFound in file $file\n\n";
111 my ($podname, $header, $dochash, $footer) = @_;
112 my $filename = "pod/$podname.pod";
113 open my $fh, '>', $filename or die "Can't open $filename: $!";
115 print $fh <<"_EOH_", $header;
116 -*- buffer-read-only: t -*-
118 !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
119 This file is built by $0 extracting documentation from the C source
125 # case insensitive sort, with fallback for determinacy
126 for $key (sort { uc($a) cmp uc($b) || $a cmp $b } keys %$dochash) {
127 my $section = $dochash->{$key};
128 print $fh "\n=head1 $key\n\n=over 8\n\n";
129 # Again, fallback for determinacy
130 for my $key (sort { uc($a) cmp uc($b) || $a cmp $b } keys %$section) {
131 docout($fh, $key, $section->{$key});
133 print $fh "\n=back\n";
136 print $fh $footer, <<'_EOF_';
142 close $fh or die "Can't close $filename: $!";
148 or die "Couldn't chdir to '$workdir': $!";
152 # glob() picks up docs from extra .c or .h files that may be in unclean
156 open FH, "MANIFEST" or die "Can't open MANIFEST: $!";
160 for $file (($MANIFEST =~ /^(\S+\.c)\t/gm), ($MANIFEST =~ /^(\S+\.h)\t/gm)) {
161 open F, "< $file" or die "Cannot open $file for docs: $!\n";
162 $curheader = "Functions in file $file\n";
164 close F or die "Error closing $file: $!\n";
167 open IN, "embed.fnc" or die $!;
169 # walk table providing an array of components in each line to
170 # subroutine, printing the result
182 my ($flags, $retval, $func, @args) = split /\s*\|\s*/, $_;
184 next unless $flags =~ /d/;
187 s/\b(NN|NULLOK)\b\s+//g for @args;
188 $func =~ s/\t//g; # clean up fields from embed.pl
191 my $docref = delete $docfuncs{$func};
192 if ($docref and @$docref) {
194 $docref->[0].="x" if $flags =~ /M/;
195 $docs{api}{$docref->[4]}{$func} =
196 [$docref->[0] . 'A', $docref->[1], $retval, $docref->[3],
199 $docs{guts}{$docref->[4]}{$func} =
200 [$docref->[0], $docref->[1], $retval, $docref->[3], @args];
204 warn "no docs for $func\n" unless $seenfuncs{$func};
208 for (sort keys %docfuncs) {
209 # Have you used a full for apidoc or just a func name?
210 # Have you used Ap instead of Am in the for apidoc?
211 warn "Unable to place $_!\n";
214 output('perlapi', <<'_EOB_', $docs{api}, <<'_EOE_');
217 perlapi - autogenerated documentation for the perl public API
220 X<Perl API> X<API> X<api>
222 This file contains the documentation of the perl public API generated by
223 embed.pl, specifically a listing of functions, macros, flags, and variables
224 that may be used by extension writers. The interfaces of any functions that
225 are not listed here are subject to change without notice. For this reason,
226 blindly using functions listed in proto.h is to be avoided when writing
229 Note that all Perl API global variables must be referenced with the C<PL_>
230 prefix. Some macros are provided for compatibility with the older,
231 unadorned names, but this support may be disabled in a future release.
233 Perl was originally written to handle US-ASCII only (that is characters
234 whose ordinal numbers are in the range 0 - 127).
235 And documentation and comments may still use the term ASCII, when
236 sometimes in fact the entire range from 0 - 255 is meant.
238 Note that Perl can be compiled and run under EBCDIC (See L<perlebcdic>)
239 or ASCII. Most of the documentation (and even comments in the code)
240 ignore the EBCDIC possibility.
241 For almost all purposes the differences are transparent.
242 As an example, under EBCDIC,
243 instead of UTF-8, UTF-EBCDIC is used to encode Unicode strings, and so
244 whenever this documentation refers to C<utf8>
245 (and variants of that name, including in function names),
246 it also (essentially transparently) means C<UTF-EBCDIC>.
247 But the ordinals of characters differ between ASCII, EBCDIC, and
248 the UTF- encodings, and a string encoded in UTF-EBCDIC may occupy more bytes
251 Also, on some EBCDIC machines, functions that are documented as operating on
252 US-ASCII (or Basic Latin in Unicode terminology) may in fact operate on all
253 256 characters in the EBCDIC range, not just the subset corresponding to
256 The listing below is alphabetical, case insensitive.
262 Until May 1997, this document was maintained by Jeff Okamoto
263 <okamoto@corp.hp.com>. It is now maintained as part of Perl itself.
265 With lots of help and suggestions from Dean Roehrich, Malcolm Beattie,
266 Andreas Koenig, Paul Hudson, Ilya Zakharevich, Paul Marquess, Neil
267 Bowers, Matthew Green, Tim Bunce, Spider Boardman, Ulrich Pfeifer,
268 Stephen McCamant, and Gurusamy Sarathy.
270 API Listing originally by Dean Roehrich <roehrich@cray.com>.
272 Updated to be autogenerated from comments in the source by Benjamin Stuhl.
276 perlguts(1), perlxs(1), perlxstut(1), perlintern(1)
280 output('perlintern', <<'END', $docs{guts}, <<'END');
283 perlintern - autogenerated documentation of purely B<internal>
287 X<internal Perl functions> X<interpreter functions>
289 This file is the autogenerated documentation of functions in the
290 Perl interpreter that are documented using Perl's internal documentation
291 format but are not marked as part of the Perl API. In other words,
292 B<they are not for use in extensions>!
298 The autodocumentation system was originally added to the Perl core by
299 Benjamin Stuhl. Documentation is by whoever was kind enough to
300 document their functions.
304 perlguts(1), perlapi(1)