crypto/openssl-0.9.7d/util/pod2man.pl

   1 : #!/usr/bin/perl-5.005
   2     eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
   3         if $running_under_some_shell;
   4
   5 $DEF_PM_SECTION = '3pm' || '3';
   6
   7 =head1 NAME
   8
   9 pod2man - translate embedded Perl pod directives into man pages
  10
  11 =head1 SYNOPSIS
  12
  13 B<pod2man>
  14 [ B<--section=>I<manext> ]
  15 [ B<--release=>I<relpatch> ]
  16 [ B<--center=>I<string> ]
  17 [ B<--date=>I<string> ]
  18 [ B<--fixed=>I<font> ]
  19 [ B<--official> ]
  20 [ B<--lax> ]
  21 I<inputfile>
  22
  23 =head1 DESCRIPTION
  24
  25 B<pod2man> converts its input file containing embedded pod directives (see
  26 L<perlpod>) into nroff source suitable for viewing with nroff(1) or
  27 troff(1) using the man(7) macro set.
  28
  29 Besides the obvious pod conversions, B<pod2man> also takes care of
  30 func(), func(n), and simple variable references like $foo or @bar so
  31 you don't have to use code escapes for them; complex expressions like
  32 C<$fred{'stuff'}> will still need to be escaped, though.  Other nagging
  33 little roffish things that it catches include translating the minus in
  34 something like foo-bar, making a long dash--like this--into a real em
  35 dash, fixing up "paired quotes", putting a little space after the
  36 parens in something like func(), making C++ and PI look right, making
  37 double underbars have a little tiny space between them, making ALLCAPS
  38 a teeny bit smaller in troff(1), and escaping backslashes so you don't
  39 have to.
  40
  41 =head1 OPTIONS
  42
  43 =over 8
  44
  45 =item center
  46
  47 Set the centered header to a specific string.  The default is
  48 "User Contributed Perl Documentation", unless the C<--official> flag is
  49 given, in which case the default is "Perl Programmers Reference Guide".
  50
  51 =item date
  52
  53 Set the left-hand footer string to this value.  By default,
  54 the modification date of the input file will be used.
  55
  56 =item fixed
  57
  58 The fixed font to use for code refs.  Defaults to CW.
  59
  60 =item official
  61
  62 Set the default header to indicate that this page is of
  63 the standard release in case C<--center> is not given.
  64
  65 =item release
  66
  67 Set the centered footer.  By default, this is the current
  68 perl release.
  69
  70 =item section
  71
  72 Set the section for the C<.TH> macro.  The standard conventions on
  73 sections are to use 1 for user commands,  2 for system calls, 3 for
  74 functions, 4 for devices, 5 for file formats, 6 for games, 7 for
  75 miscellaneous information, and 8 for administrator commands.  This works
  76 best if you put your Perl man pages in a separate tree, like
  77 F</usr/local/perl/man/>.  By default, section 1 will be used
  78 unless the file ends in F<.pm> in which case section 3 will be selected.
  79
  80 =item lax
  81
  82 Don't complain when required sections aren't present.
  83
  84 =back
  85
  86 =head1 Anatomy of a Proper Man Page
  87
  88 For those not sure of the proper layout of a man page, here's
  89 an example of the skeleton of a proper man page.  Head of the
  90 major headers should be setout as a C<=head1> directive, and
  91 are historically written in the rather startling ALL UPPER CASE
  92 format, although this is not mandatory.
  93 Minor headers may be included using C<=head2>, and are
  94 typically in mixed case.
  95
  96 =over 10
  97
  98 =item NAME
  99
 100 Mandatory section; should be a comma-separated list of programs or
 101 functions documented by this podpage, such as:
 102
 103     foo, bar - programs to do something
 104
 105 =item SYNOPSIS
 106
 107 A short usage summary for programs and functions, which
 108 may someday be deemed mandatory.
 109
 110 =item DESCRIPTION
 111
 112 Long drawn out discussion of the program.  It's a good idea to break this
 113 up into subsections using the C<=head2> directives, like
 114
 115     =head2 A Sample Subection
 116
 117     =head2 Yet Another Sample Subection
 118
 119 =item OPTIONS
 120
 121 Some people make this separate from the description.
 122
 123 =item RETURN VALUE
 124
 125 What the program or function returns if successful.
 126
 127 =item ERRORS
 128
 129 Exceptions, return codes, exit stati, and errno settings.
 130
 131 =item EXAMPLES
 132
 133 Give some example uses of the program.
 134
 135 =item ENVIRONMENT
 136
 137 Envariables this program might care about.
 138
 139 =item FILES
 140
 141 All files used by the program.  You should probably use the FE<lt>E<gt>
 142 for these.
 143
 144 =item SEE ALSO
 145
 146 Other man pages to check out, like man(1), man(7), makewhatis(8), or catman(8).
 147
 148 =item NOTES
 149
 150 Miscellaneous commentary.
 151
 152 =item CAVEATS
 153
 154 Things to take special care with; sometimes called WARNINGS.
 155
 156 =item DIAGNOSTICS
 157
 158 All possible messages the program can print out--and
 159 what they mean.
 160
 161 =item BUGS
 162
 163 Things that are broken or just don't work quite right.
 164
 165 =item RESTRICTIONS
 166
 167 Bugs you don't plan to fix :-)
 168
 169 =item AUTHOR
 170
 171 Who wrote it (or AUTHORS if multiple).
 172
 173 =item HISTORY
 174
 175 Programs derived from other sources sometimes have this, or
 176 you might keep a modification log here.
 177
 178 =back
 179
 180 =head1 EXAMPLES
 181
 182     pod2man program > program.1
 183     pod2man some_module.pm > /usr/perl/man/man3/some_module.3
 184     pod2man --section=7 note.pod > note.7
 185
 186 =head1 DIAGNOSTICS
 187
 188 The following diagnostics are generated by B<pod2man>.  Items
 189 marked "(W)" are non-fatal, whereas the "(F)" errors will cause
 190 B<pod2man> to immediately exit with a non-zero status.
 191
 192 =over 4
 193
 194 =item bad option in paragraph %d of %s: ``%s'' should be [%s]<%s>
 195
 196 (W) If you start include an option, you should set it off
 197 as bold, italic, or code.
 198
 199 =item can't open %s: %s
 200
 201 (F) The input file wasn't available for the given reason.
 202
 203 =item Improper man page - no dash in NAME header in paragraph %d of %s
 204
 205 (W) The NAME header did not have an isolated dash in it.  This is
 206 considered important.
 207
 208 =item Invalid man page - no NAME line in %s
 209
 210 (F) You did not include a NAME header, which is essential.
 211
 212 =item roff font should be 1 or 2 chars, not `%s'  (F)
 213
 214 (F) The font specified with the C<--fixed> option was not
 215 a one- or two-digit roff font.
 216
 217 =item %s is missing required section: %s
 218
 219 (W) Required sections include NAME, DESCRIPTION, and if you're
 220 using a section starting with a 3, also a SYNOPSIS.  Actually,
 221 not having a NAME is a fatal.
 222
 223 =item Unknown escape: %s in %s
 224
 225 (W) An unknown HTML entity (probably for an 8-bit character) was given via
 226 a C<EE<lt>E<gt>> directive.  Besides amp, lt, gt, and quot, recognized
 227 entities are Aacute, aacute, Acirc, acirc, AElig, aelig, Agrave, agrave,
 228 Aring, aring, Atilde, atilde, Auml, auml, Ccedil, ccedil, Eacute, eacute,
 229 Ecirc, ecirc, Egrave, egrave, ETH, eth, Euml, euml, Iacute, iacute, Icirc,
 230 icirc, Igrave, igrave, Iuml, iuml, Ntilde, ntilde, Oacute, oacute, Ocirc,
 231 ocirc, Ograve, ograve, Oslash, oslash, Otilde, otilde, Ouml, ouml, szlig,
 232 THORN, thorn, Uacute, uacute, Ucirc, ucirc, Ugrave, ugrave, Uuml, uuml,
 233 Yacute, yacute, and yuml.
 234
 235 =item Unmatched =back
 236
 237 (W) You have a C<=back> without a corresponding C<=over>.
 238
 239 =item Unrecognized pod directive: %s
 240
 241 (W) You specified a pod directive that isn't in the known list of
 242 C<=head1>, C<=head2>, C<=item>, C<=over>, C<=back>, or C<=cut>.
 243
 244
 245 =back
 246
 247 =head1 NOTES
 248
 249 If you would like to print out a lot of man page continuously, you
 250 probably want to set the C and D registers to set contiguous page
 251 numbering and even/odd paging, at least on some versions of man(7).
 252 Settting the F register will get you some additional experimental
 253 indexing:
 254
 255     troff -man -rC1 -rD1 -rF1 perl.1 perldata.1 perlsyn.1 ...
 256
 257 The indexing merely outputs messages via C<.tm> for each
 258 major page, section, subsection, item, and any C<XE<lt>E<gt>>
 259 directives.
 260
 261
 262 =head1 RESTRICTIONS
 263
 264 None at this time.
 265
 266 =head1 BUGS
 267
 268 The =over and =back directives don't really work right.  They
 269 take absolute positions instead of offsets, don't nest well, and
 270 making people count is suboptimal in any event.
 271
 272 =head1 AUTHORS
 273
 274 Original prototype by Larry Wall, but so massively hacked over by
 275 Tom Christiansen such that Larry probably doesn't recognize it anymore.
 276
 277 =cut
 278
 279 $/ = "";
 280 $cutting = 1;
 281 @Indices = ();
 282
 283 # We try first to get the version number from a local binary, in case we're
 284 # running an installed version of Perl to produce documentation from an
 285 # uninstalled newer version's pod files.
 286 if ($^O ne 'plan9' and $^O ne 'dos' and $^O ne 'os2' and $^O ne 'MSWin32') {
 287   my $perl = (-x './perl' && -f './perl' ) ?
 288                  './perl' :
 289                  ((-x '../perl' && -f '../perl') ?
 290                       '../perl' :
 291                       '');
 292   ($version,$patch) = `$perl -e 'print $]'` =~ /^(\d\.\d{3})(\d{2})?/ if $perl;
 293 }
 294 # No luck; we'll just go with the running Perl's version
 295 ($version,$patch) = $] =~ /^(.{5})(\d{2})?/ unless $version;
 296 $DEF_RELEASE  = "perl $version";
 297 $DEF_RELEASE .= ", patch $patch" if $patch;
 298
 299
 300 sub makedate {
 301     my $secs = shift;
 302     my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($secs);
 303     my $mname = (qw{Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec})[$mon];
 304     $year += 1900;
 305     return "$mday/$mname/$year";
 306 }
 307
 308 use Getopt::Long;
 309
 310 $DEF_SECTION = 1;
 311 $DEF_CENTER = "User Contributed Perl Documentation";
 312 $STD_CENTER = "Perl Programmers Reference Guide";
 313 $DEF_FIXED = 'CW';
 314 $DEF_LAX = 0;
 315
 316 sub usage {
 317     warn "$0: @_\n" if @_;
 318     die <<EOF;
 319 usage: $0 [options] podpage
 320 Options are:
 321         --section=manext      (default "$DEF_SECTION")
 322         --release=relpatch    (default "$DEF_RELEASE")
 323         --center=string       (default "$DEF_CENTER")
 324         --date=string         (default "$DEF_DATE")
 325         --fixed=font          (default "$DEF_FIXED")
 326         --official            (default NOT)
 327         --lax                 (default NOT)
 328 EOF
 329 }
 330
 331 $uok = GetOptions( qw(
 332         section=s
 333         release=s
 334         center=s
 335         date=s
 336         fixed=s
 337         official
 338         lax
 339         help));
 340
 341 $DEF_DATE = makedate((stat($ARGV[0]))[9] || time());
 342
 343 usage("Usage error!") unless $uok;
 344 usage() if $opt_help;
 345 usage("Need one and only one podpage argument") unless @ARGV == 1;
 346
 347 $section = $opt_section || ($ARGV[0] =~ /\.pm$/
 348                                 ? $DEF_PM_SECTION : $DEF_SECTION);
 349 $RP = $opt_release || $DEF_RELEASE;
 350 $center = $opt_center || ($opt_official ? $STD_CENTER : $DEF_CENTER);
 351 $lax = $opt_lax || $DEF_LAX;
 352
 353 $CFont = $opt_fixed || $DEF_FIXED;
 354
 355 if (length($CFont) == 2) {
 356     $CFont_embed = "\\f($CFont";
 357 }
 358 elsif (length($CFont) == 1) {
 359     $CFont_embed = "\\f$CFont";
 360 }
 361 else {
 362     die "roff font should be 1 or 2 chars, not `$CFont_embed'";
 363 }
 364
 365 $date = $opt_date || $DEF_DATE;
 366
 367 for (qw{NAME DESCRIPTION}) {
 368 # for (qw{NAME DESCRIPTION AUTHOR}) {
 369     $wanna_see{$_}++;
 370 }
 371 $wanna_see{SYNOPSIS}++ if $section =~ /^3/;
 372
 373
 374 $name = @ARGV ? $ARGV[0] : "<STDIN>";
 375 $Filename = $name;
 376 if ($section =~ /^1/) {
 377     require File::Basename;
 378     $name = uc File::Basename::basename($name);
 379 }
 380 $name =~ s/\.(pod|p[lm])$//i;
 381
 382 # Lose everything up to the first of
 383 #     */lib/*perl*      standard or site_perl module
 384 #     */*perl*/lib      from -D prefix=/opt/perl
 385 #     */*perl*/         random module hierarchy
 386 # which works.
 387 $name =~ s-//+-/-g;
 388 if ($name =~ s-^.*?/lib/[^/]*perl[^/]*/--i
 389         or $name =~ s-^.*?/[^/]*perl[^/]*/lib/--i
 390         or $name =~ s-^.*?/[^/]*perl[^/]*/--i) {
 391     # Lose ^site(_perl)?/.
 392     $name =~ s-^site(_perl)?/--;
 393     # Lose ^arch/.      (XXX should we use Config? Just for archname?)
 394     $name =~ s~^(.*-$^O|$^O-.*)/~~o;
 395     # Lose ^version/.
 396     $name =~ s-^\d+\.\d+/--;
 397 }
 398
 399 # Translate Getopt/Long to Getopt::Long, etc.
 400 $name =~ s(/)(::)g;
 401
 402 if ($name ne 'something') {
 403     FCHECK: {
 404         open(F, "< $ARGV[0]") || die "can't open $ARGV[0]: $!";
 405         while (<F>) {
 406             next unless /^=\b/;
 407             if (/^=head1\s+NAME\s*$/) {  # an /m would forgive mistakes
 408                 $_ = <F>;
 409                 unless (/\s*-+\s+/) {
 410                     $oops++;
 411                     warn "$0: Improper man page - no dash in NAME header in paragraph $. of $ARGV[0]\n"
 412                 } else {
 413                     my @n = split /\s+-+\s+/;
 414                     if (@n != 2) {
 415                         $oops++;
 416                         warn "$0: Improper man page - malformed NAME header in paragraph $. of $ARGV[0]\n"
 417                     }
 418                     else {
 419                         $n[0] =~ s/\n/ /g;
 420                         $n[1] =~ s/\n/ /g;
 421                         %namedesc = @n;
 422                     }
 423                 }
 424                 last FCHECK;
 425             }
 426             next if /^=cut\b/;  # DB_File and Net::Ping have =cut before NAME
 427             next if /^=pod\b/;  # It is OK to have =pod before NAME
 428             die "$0: Invalid man page - 1st pod line is not NAME in $ARGV[0]\n" unless $lax;
 429         }
 430         die "$0: Invalid man page - no documentation in $ARGV[0]\n" unless $lax;
 431     }
 432     close F;
 433 }
 434
 435 print <<"END";
 436 .rn '' }`
 437 ''' \$RCSfile\$\$Revision\$\$Date\$
 438 '''
 439 ''' \$Log\$
 440 '''
 441 .de Sh
 442 .br
 443 .if t .Sp
 444 .ne 5
 445 .PP
 446 \\fB\\\\\$1\\fR
 447 .PP
 448 ..
 449 .de Sp
 450 .if t .sp .5v
 451 .if n .sp
 452 ..
 453 .de Ip
 454 .br
 455 .ie \\\\n(.\$>=3 .ne \\\\\$3
 456 .el .ne 3
 457 .IP "\\\\\$1" \\\\\$2
 458 ..
 459 .de Vb
 460 .ft $CFont
 461 .nf
 462 .ne \\\\\$1
 463 ..
 464 .de Ve
 465 .ft R
 466
 467 .fi
 468 ..
 469 '''
 470 '''
 471 '''     Set up \\*(-- to give an unbreakable dash;
 472 '''     string Tr holds user defined translation string.
 473 '''     Bell System Logo is used as a dummy character.
 474 '''
 475 .tr \\(*W-|\\(bv\\*(Tr
 476 .ie n \\{\\
 477 .ds -- \\(*W-
 478 .ds PI pi
 479 .if (\\n(.H=4u)&(1m=24u) .ds -- \\(*W\\h'-12u'\\(*W\\h'-12u'-\\" diablo 10 pitch
 480 .if (\\n(.H=4u)&(1m=20u) .ds -- \\(*W\\h'-12u'\\(*W\\h'-8u'-\\" diablo 12 pitch
 481 .ds L" ""
 482 .ds R" ""
 483 '''   \\*(M", \\*(S", \\*(N" and \\*(T" are the equivalent of
 484 '''   \\*(L" and \\*(R", except that they are used on ".xx" lines,
 485 '''   such as .IP and .SH, which do another additional levels of
 486 '''   double-quote interpretation
 487 .ds M" """
 488 .ds S" """
 489 .ds N" """""
 490 .ds T" """""
 491 .ds L' '
 492 .ds R' '
 493 .ds M' '
 494 .ds S' '
 495 .ds N' '
 496 .ds T' '
 497 'br\\}
 498 .el\\{\\
 499 .ds -- \\(em\\|
 500 .tr \\*(Tr
 501 .ds L" ``
 502 .ds R" ''
 503 .ds M" ``
 504 .ds S" ''
 505 .ds N" ``
 506 .ds T" ''
 507 .ds L' `
 508 .ds R' '
 509 .ds M' `
 510 .ds S' '
 511 .ds N' `
 512 .ds T' '
 513 .ds PI \\(*p
 514 'br\\}
 515 END
 516
 517 print <<'END';
 518 .\"     If the F register is turned on, we'll generate
 519 .\"     index entries out stderr for the following things:
 520 .\"             TH      Title
 521 .\"             SH      Header
 522 .\"             Sh      Subsection
 523 .\"             Ip      Item
 524 .\"             X<>     Xref  (embedded
 525 .\"     Of course, you have to process the output yourself
 526 .\"     in some meaninful fashion.
 527 .if \nF \{
 528 .de IX
 529 .tm Index:\\$1\t\\n%\t"\\$2"
 530 ..
 531 .nr % 0
 532 .rr F
 533 .\}
 534 END
 535
 536 print <<"END";
 537 .TH $name $section "$RP" "$date" "$center"
 538 .UC
 539 END
 540
 541 push(@Indices, qq{.IX Title "$name $section"});
 542
 543 while (($name, $desc) = each %namedesc) {
 544     for ($name, $desc) { s/^\s+//; s/\s+$//; }
 545     push(@Indices, qq(.IX Name "$name - $desc"\n));
 546 }
 547
 548 print <<'END';
 549 .if n .hy 0
 550 .if n .na
 551 .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
 552 .de CQ          \" put $1 in typewriter font
 553 END
 554 print ".ft $CFont\n";
 555 print <<'END';
 556 'if n "\c
 557 'if t \\&\\$1\c
 558 'if n \\&\\$1\c
 559 'if n \&"
 560 \\&\\$2 \\$3 \\$4 \\$5 \\$6 \\$7
 561 '.ft R
 562 ..
 563 .\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2
 564 .       \" AM - accent mark definitions
 565 .bd B 3
 566 .       \" fudge factors for nroff and troff
 567 .if n \{\
 568 .       ds #H 0
 569 .       ds #V .8m
 570 .       ds #F .3m
 571 .       ds #[ \f1
 572 .       ds #] \fP
 573 .\}
 574 .if t \{\
 575 .       ds #H ((1u-(\\\\n(.fu%2u))*.13m)
 576 .       ds #V .6m
 577 .       ds #F 0
 578 .       ds #[ \&
 579 .       ds #] \&
 580 .\}
 581 .       \" simple accents for nroff and troff
 582 .if n \{\
 583 .       ds ' \&
 584 .       ds ` \&
 585 .       ds ^ \&
 586 .       ds , \&
 587 .       ds ~ ~
 588 .       ds ? ?
 589 .       ds ! !
 590 .       ds /
 591 .       ds q
 592 .\}
 593 .if t \{\
 594 .       ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
 595 .       ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
 596 .       ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
 597 .       ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
 598 .       ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
 599 .       ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10'
 600 .       ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m'
 601 .       ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
 602 .       ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10'
 603 .\}
 604 .       \" troff and (daisy-wheel) nroff accents
 605 .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
 606 .ds 8 \h'\*(#H'\(*b\h'-\*(#H'
 607 .ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#]
 608 .ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u'
 609 .ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u'
 610 .ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#]
 611 .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
 612 .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
 613 .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
 614 .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
 615 .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
 616 .ds ae a\h'-(\w'a'u*4/10)'e
 617 .ds Ae A\h'-(\w'A'u*4/10)'E
 618 .ds oe o\h'-(\w'o'u*4/10)'e
 619 .ds Oe O\h'-(\w'O'u*4/10)'E
 620 .       \" corrections for vroff
 621 .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
 622 .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
 623 .       \" for low resolution devices (crt and lpr)
 624 .if \n(.H>23 .if \n(.V>19 \
 625 \{\
 626 .       ds : e
 627 .       ds 8 ss
 628 .       ds v \h'-1'\o'\(aa\(ga'
 629 .       ds _ \h'-1'^
 630 .       ds . \h'-1'.
 631 .       ds 3 3
 632 .       ds o a
 633 .       ds d- d\h'-1'\(ga
 634 .       ds D- D\h'-1'\(hy
 635 .       ds th \o'bp'
 636 .       ds Th \o'LP'
 637 .       ds ae ae
 638 .       ds Ae AE
 639 .       ds oe oe
 640 .       ds Oe OE
 641 .\}
 642 .rm #[ #] #H #V #F C
 643 END
 644
 645 $indent = 0;
 646
 647 $begun = "";
 648
 649 # Unrolling [^A-Z>]|[A-Z](?!<) gives:    // MRE pp 165.
 650 my $nonest = '(?:[^A-Z>]*(?:[A-Z](?!<)[^A-Z>]*)*)';
 651
 652 while (<>) {
 653     if ($cutting) {
 654         next unless /^=/;
 655         $cutting = 0;
 656     }
 657     if ($begun) {
 658         if (/^=end\s+$begun/) {
 659             $begun = "";
 660         }
 661         elsif ($begun =~ /^(roff|man)$/) {
 662             print STDOUT $_;
 663         }
 664         next;
 665     }
 666     chomp;
 667
 668     # Translate verbatim paragraph
 669
 670     if (/^\s/) {
 671         @lines = split(/\n/);
 672         for (@lines) {
 673             1 while s
 674                 {^( [^\t]* ) \t ( \t* ) }
 675                 { $1 . ' ' x (8 - (length($1)%8) + 8 * (length($2))) }ex;
 676             s/\\/\\e/g;
 677             s/\A/\\&/s;
 678         }
 679         $lines = @lines;
 680         makespace() unless $verbatim++;
 681         print ".Vb $lines\n";
 682         print join("\n", @lines), "\n";
 683         print ".Ve\n";
 684         $needspace = 0;
 685         next;
 686     }
 687
 688     $verbatim = 0;
 689
 690     if (/^=for\s+(\S+)\s*/s) {
 691         if ($1 eq "man" or $1 eq "roff") {
 692             print STDOUT $',"\n\n";
 693         } else {
 694             # ignore unknown for
 695         }
 696         next;
 697     }
 698     elsif (/^=begin\s+(\S+)\s*/s) {
 699         $begun = $1;
 700         if ($1 eq "man" or $1 eq "roff") {
 701             print STDOUT $'."\n\n";
 702         }
 703         next;
 704     }
 705
 706     # check for things that'll hosed our noremap scheme; affects $_
 707     init_noremap();
 708
 709     if (!/^=item/) {
 710
 711         # trofficate backslashes; must do it before what happens below
 712         s/\\/noremap('\\e')/ge;
 713
 714         # protect leading periods and quotes against *roff
 715         # mistaking them for directives
 716         s/^(?:[A-Z]<)?[.']/\\&$&/gm;
 717
 718         # first hide the escapes in case we need to
 719         # intuit something and get it wrong due to fmting
 720
 721         1 while s/([A-Z]<$nonest>)/noremap($1)/ge;
 722
 723         # func() is a reference to a perl function
 724         s{
 725             \b
 726             (
 727                 [:\w]+ \(\)
 728             )
 729         } {I<$1>}gx;
 730
 731         # func(n) is a reference to a perl function or a man page
 732         s{
 733             ([:\w]+)
 734             (
 735                 \( [^\051]+ \)
 736             )
 737         } {I<$1>\\|$2}gx;
 738
 739         # convert simple variable references
 740         s/(\s+)([\$\@%][\w:]+)(?!\()/${1}C<$2>/g;
 741
 742         if (m{ (
 743                     [\-\w]+
 744                     \(
 745                         [^\051]*?
 746                         [\@\$,]
 747                         [^\051]*?
 748                     \)
 749                 )
 750             }x && $` !~ /([LCI]<[^<>]*|-)$/ && !/^=\w/)
 751         {
 752             warn "$0: bad option in paragraph $. of $ARGV: ``$1'' should be [LCI]<$1>\n";
 753             $oops++;
 754         }
 755
 756         while (/(-[a-zA-Z])\b/g && $` !~ /[\w\-]$/) {
 757             warn "$0: bad option in paragraph $. of $ARGV: ``$1'' should be [CB]<$1>\n";
 758             $oops++;
 759         }
 760
 761         # put it back so we get the <> processed again;
 762         clear_noremap(0); # 0 means leave the E's
 763
 764     } else {
 765         # trofficate backslashes
 766         s/\\/noremap('\\e')/ge;
 767
 768     }
 769
 770     # need to hide E<> first; they're processed in clear_noremap
 771     s/(E<[^<>]+>)/noremap($1)/ge;
 772
 773
 774     $maxnest = 10;
 775     while ($maxnest-- && /[A-Z]</) {
 776
 777         # can't do C font here
 778         s/([BI])<($nonest)>/font($1) . $2 . font('R')/eg;
 779
 780         # files and filelike refs in italics
 781         s/F<($nonest)>/I<$1>/g;
 782
 783         # no break -- usually we want C<> for this
 784         s/S<($nonest)>/nobreak($1)/eg;
 785
 786         # LREF: a la HREF L<show this text|man/section>
 787         s:L<([^|>]+)\|[^>]+>:$1:g;
 788
 789         # LREF: a manpage(3f)
 790         s:L<([a-zA-Z][^\s\/]+)(\([^\)]+\))?>:the I<$1>$2 manpage:g;
 791
 792         # LREF: an =item on another manpage
 793         s{
 794             L<
 795                 ([^/]+)
 796                 /
 797                 (
 798                     [:\w]+
 799                     (\(\))?
 800                 )
 801             >
 802         } {the C<$2> entry in the I<$1> manpage}gx;
 803
 804         # LREF: an =item on this manpage
 805         s{
 806            ((?:
 807             L<
 808                 /
 809                 (
 810                     [:\w]+
 811                     (\(\))?
 812                 )
 813             >
 814             (,?\s+(and\s+)?)?
 815           )+)
 816         } { internal_lrefs($1) }gex;
 817
 818         # LREF: a =head2 (head1?), maybe on a manpage, maybe right here
 819         # the "func" can disambiguate
 820         s{
 821             L<
 822                 (?:
 823                     ([a-zA-Z]\S+?) /
 824                 )?
 825                 "?(.*?)"?
 826             >
 827         }{
 828             do {
 829                 $1      # if no $1, assume it means on this page.
 830                     ?  "the section on I<$2> in the I<$1> manpage"
 831                     :  "the section on I<$2>"
 832             }
 833         }gesx; # s in case it goes over multiple lines, so . matches \n
 834
 835         s/Z<>/\\&/g;
 836
 837         # comes last because not subject to reprocessing
 838         s/C<($nonest)>/noremap("${CFont_embed}${1}\\fR")/eg;
 839     }
 840
 841     if (s/^=//) {
 842         $needspace = 0;         # Assume this.
 843
 844         s/\n/ /g;
 845
 846         ($Cmd, $_) = split(' ', $_, 2);
 847
 848         $dotlevel = 1;
 849         if ($Cmd eq 'head1') {
 850            $dotlevel = 1;
 851         }
 852         elsif ($Cmd eq 'head2') {
 853            $dotlevel = 1;
 854         }
 855         elsif ($Cmd eq 'item') {
 856            $dotlevel = 2;
 857         }
 858
 859         if (defined $_) {
 860             &escapes($dotlevel);
 861             s/"/""/g;
 862         }
 863
 864         clear_noremap(1);
 865
 866         if ($Cmd eq 'cut') {
 867             $cutting = 1;
 868         }
 869         elsif ($Cmd eq 'head1') {
 870             s/\s+$//;
 871             delete $wanna_see{$_} if exists $wanna_see{$_};
 872             print qq{.SH "$_"\n};
 873       push(@Indices, qq{.IX Header "$_"\n});
 874         }
 875         elsif ($Cmd eq 'head2') {
 876             print qq{.Sh "$_"\n};
 877       push(@Indices, qq{.IX Subsection "$_"\n});
 878         }
 879         elsif ($Cmd eq 'over') {
 880             push(@indent,$indent);
 881             $indent += ($_ + 0) || 5;
 882         }
 883         elsif ($Cmd eq 'back') {
 884             $indent = pop(@indent);
 885             warn "$0: Unmatched =back in paragraph $. of $ARGV\n" unless defined $indent;
 886             $needspace = 1;
 887         }
 888         elsif ($Cmd eq 'item') {
 889             s/^\*( |$)/\\(bu$1/g;
 890             # if you know how to get ":s please do
 891             s/\\\*\(L"([^"]+?)\\\*\(R"/'$1'/g;
 892             s/\\\*\(L"([^"]+?)""/'$1'/g;
 893             s/[^"]""([^"]+?)""[^"]/'$1'/g;
 894             # here do something about the $" in perlvar?
 895             print STDOUT qq{.Ip "$_" $indent\n};
 896       push(@Indices, qq{.IX Item "$_"\n});
 897         }
 898         elsif ($Cmd eq 'pod') {
 899             # this is just a comment
 900         }
 901         else {
 902             warn "$0: Unrecognized pod directive in paragraph $. of $ARGV: $Cmd\n";
 903         }
 904     }
 905     else {
 906         if ($needspace) {
 907             &makespace;
 908         }
 909         &escapes(0);
 910         clear_noremap(1);
 911         print $_, "\n";
 912         $needspace = 1;
 913     }
 914 }
 915
 916 print <<"END";
 917
 918 .rn }` ''
 919 END
 920
 921 if (%wanna_see && !$lax) {
 922     @missing = keys %wanna_see;
 923     warn "$0: $Filename is missing required section"
 924         .  (@missing > 1 && "s")
 925         .  ": @missing\n";
 926     $oops++;
 927 }
 928
 929 foreach (@Indices) { print "$_\n"; }
 930
 931 exit;
 932 #exit ($oops != 0);
 933
 934 #########################################################################
 935
 936 sub nobreak {
 937     my $string = shift;
 938     $string =~ s/ /\\ /g;
 939     $string;
 940 }
 941
 942 sub escapes {
 943     my $indot = shift;
 944
 945     s/X<(.*?)>/mkindex($1)/ge;
 946
 947     # translate the minus in foo-bar into foo\-bar for roff
 948     s/([^0-9a-z-])-([^-])/$1\\-$2/g;
 949
 950     # make -- into the string version \*(-- (defined above)
 951     s/\b--\b/\\*(--/g;
 952     s/"--([^"])/"\\*(--$1/g;  # should be a better way
 953     s/([^"])--"/$1\\*(--"/g;
 954
 955     # fix up quotes; this is somewhat tricky
 956     my $dotmacroL = 'L';
 957     my $dotmacroR = 'R';
 958     if ( $indot == 1 ) {
 959         $dotmacroL = 'M';
 960         $dotmacroR = 'S';
 961     }
 962     elsif ( $indot >= 2 ) {
 963         $dotmacroL = 'N';
 964         $dotmacroR = 'T';
 965     }
 966     if (!/""/) {
 967         s/(^|\s)(['"])/noremap("$1\\*($dotmacroL$2")/ge;
 968         s/(['"])($|[\-\s,;\\!?.])/noremap("\\*($dotmacroR$1$2")/ge;
 969     }
 970
 971     #s/(?!")(?:.)--(?!")(?:.)/\\*(--/g;
 972     #s/(?:(?!")(?:.)--(?:"))|(?:(?:")--(?!")(?:.))/\\*(--/g;
 973
 974
 975     # make sure that func() keeps a bit a space tween the parens
 976     ### s/\b\(\)/\\|()/g;
 977     ### s/\b\(\)/(\\|)/g;
 978
 979     # make C++ into \*C+, which is a squinched version (defined above)
 980     s/\bC\+\+/\\*(C+/g;
 981
 982     # make double underbars have a little tiny space between them
 983     s/__/_\\|_/g;
 984
 985     # PI goes to \*(PI (defined above)
 986     s/\bPI\b/noremap('\\*(PI')/ge;
 987
 988     # make all caps a teeny bit smaller, but don't muck with embedded code literals
 989     my $hidCFont = font('C');
 990     if ($Cmd !~ /^head1/) { # SH already makes smaller
 991         # /g isn't enough; 1 while or we'll be off
 992
 993 #       1 while s{
 994 #           (?!$hidCFont)(..|^.|^)
 995 #           \b
 996 #           (
 997 #               [A-Z][\/A-Z+:\-\d_$.]+
 998 #           )
 999 #           (s?)
1000 #           \b
1001 #       } {$1\\s-1$2\\s0}gmox;
1002
1003         1 while s{
1004             (?!$hidCFont)(..|^.|^)
1005             (
1006                 \b[A-Z]{2,}[\/A-Z+:\-\d_\$]*\b
1007             )
1008         } {
1009             $1 . noremap( '\\s-1' .  $2 . '\\s0' )
1010         }egmox;
1011
1012     }
1013 }
1014
1015 # make troff just be normal, but make small nroff get quoted
1016 # decided to just put the quotes in the text; sigh;
1017 sub ccvt {
1018     local($_,$prev) = @_;
1019     noremap(qq{.CQ "$_" \n\\&});
1020 }
1021
1022 sub makespace {
1023     if ($indent) {
1024         print ".Sp\n";
1025     }
1026     else {
1027         print ".PP\n";
1028     }
1029 }
1030
1031 sub mkindex {
1032     my ($entry) = @_;
1033     my @entries = split m:\s*/\s*:, $entry;
1034     push @Indices, ".IX Xref " . join ' ', map {qq("$_")} @entries;
1035     return '';
1036 }
1037
1038 sub font {
1039     local($font) = shift;
1040     return '\\f' . noremap($font);
1041 }
1042
1043 sub noremap {
1044     local($thing_to_hide) = shift;
1045     $thing_to_hide =~ tr/\000-\177/\200-\377/;
1046     return $thing_to_hide;
1047 }
1048
1049 sub init_noremap {
1050         # escape high bit characters in input stream
1051         s/([\200-\377])/"E<".ord($1).">"/ge;
1052 }
1053
1054 sub clear_noremap {
1055     my $ready_to_print = $_[0];
1056
1057     tr/\200-\377/\000-\177/;
1058
1059     # trofficate backslashes
1060     # s/(?!\\e)(?:..|^.|^)\\/\\e/g;
1061
1062     # now for the E<>s, which have been hidden until now
1063     # otherwise the interative \w<> processing would have
1064     # been hosed by the E<gt>
1065     s {
1066             E<
1067             (
1068                 ( \d + )
1069                 | ( [A-Za-z]+ )
1070             )
1071             >
1072     } {
1073          do {
1074              defined $2
1075                 ? chr($2)
1076                 :
1077              exists $HTML_Escapes{$3}
1078                 ? do { $HTML_Escapes{$3} }
1079                 : do {
1080                     warn "$0: Unknown escape in paragraph $. of $ARGV: ``$&''\n";
1081                     "E<$1>";
1082                 }
1083          }
1084     }egx if $ready_to_print;
1085 }
1086
1087 sub internal_lrefs {
1088     local($_) = shift;
1089     local $trailing_and = s/and\s+$// ? "and " : "";
1090
1091     s{L</([^>]+)>}{$1}g;
1092     my(@items) = split( /(?:,?\s+(?:and\s+)?)/ );
1093     my $retstr = "the ";
1094     my $i;
1095     for ($i = 0; $i <= $#items; $i++) {
1096         $retstr .= "C<$items[$i]>";
1097         $retstr .= ", " if @items > 2 && $i != $#items;
1098         $retstr .= " and " if $i+2 == @items;
1099     }
1100
1101     $retstr .= " entr" . ( @items > 1  ? "ies" : "y" )
1102             .  " elsewhere in this document";
1103     # terminal space to avoid words running together (pattern used
1104     # strips terminal spaces)
1105     $retstr .= " " if length $trailing_and;
1106     $retstr .=  $trailing_and;
1107
1108     return $retstr;
1109
1110 }
1111
1112 BEGIN {
1113 %HTML_Escapes = (
1114     'amp'       =>      '&',    #   ampersand
1115     'lt'        =>      '<',    #   left chevron, less-than
1116     'gt'        =>      '>',    #   right chevron, greater-than
1117     'quot'      =>      '"',    #   double quote
1118
1119     "Aacute"    =>      "A\\*'",        #   capital A, acute accent
1120     "aacute"    =>      "a\\*'",        #   small a, acute accent
1121     "Acirc"     =>      "A\\*^",        #   capital A, circumflex accent
1122     "acirc"     =>      "a\\*^",        #   small a, circumflex accent
1123     "AElig"     =>      '\*(AE',        #   capital AE diphthong (ligature)
1124     "aelig"     =>      '\*(ae',        #   small ae diphthong (ligature)
1125     "Agrave"    =>      "A\\*`",        #   capital A, grave accent
1126     "agrave"    =>      "A\\*`",        #   small a, grave accent
1127     "Aring"     =>      'A\\*o',        #   capital A, ring
1128     "aring"     =>      'a\\*o',        #   small a, ring
1129     "Atilde"    =>      'A\\*~',        #   capital A, tilde
1130     "atilde"    =>      'a\\*~',        #   small a, tilde
1131     "Auml"      =>      'A\\*:',        #   capital A, dieresis or umlaut mark
1132     "auml"      =>      'a\\*:',        #   small a, dieresis or umlaut mark
1133     "Ccedil"    =>      'C\\*,',        #   capital C, cedilla
1134     "ccedil"    =>      'c\\*,',        #   small c, cedilla
1135     "Eacute"    =>      "E\\*'",        #   capital E, acute accent
1136     "eacute"    =>      "e\\*'",        #   small e, acute accent
1137     "Ecirc"     =>      "E\\*^",        #   capital E, circumflex accent
1138     "ecirc"     =>      "e\\*^",        #   small e, circumflex accent
1139     "Egrave"    =>      "E\\*`",        #   capital E, grave accent
1140     "egrave"    =>      "e\\*`",        #   small e, grave accent
1141     "ETH"       =>      '\\*(D-',       #   capital Eth, Icelandic
1142     "eth"       =>      '\\*(d-',       #   small eth, Icelandic
1143     "Euml"      =>      "E\\*:",        #   capital E, dieresis or umlaut mark
1144     "euml"      =>      "e\\*:",        #   small e, dieresis or umlaut mark
1145     "Iacute"    =>      "I\\*'",        #   capital I, acute accent
1146     "iacute"    =>      "i\\*'",        #   small i, acute accent
1147     "Icirc"     =>      "I\\*^",        #   capital I, circumflex accent
1148     "icirc"     =>      "i\\*^",        #   small i, circumflex accent
1149     "Igrave"    =>      "I\\*`",        #   capital I, grave accent
1150     "igrave"    =>      "i\\*`",        #   small i, grave accent
1151     "Iuml"      =>      "I\\*:",        #   capital I, dieresis or umlaut mark
1152     "iuml"      =>      "i\\*:",        #   small i, dieresis or umlaut mark
1153     "Ntilde"    =>      'N\*~',         #   capital N, tilde
1154     "ntilde"    =>      'n\*~',         #   small n, tilde
1155     "Oacute"    =>      "O\\*'",        #   capital O, acute accent
1156     "oacute"    =>      "o\\*'",        #   small o, acute accent
1157     "Ocirc"     =>      "O\\*^",        #   capital O, circumflex accent
1158     "ocirc"     =>      "o\\*^",        #   small o, circumflex accent
1159     "Ograve"    =>      "O\\*`",        #   capital O, grave accent
1160     "ograve"    =>      "o\\*`",        #   small o, grave accent
1161     "Oslash"    =>      "O\\*/",        #   capital O, slash
1162     "oslash"    =>      "o\\*/",        #   small o, slash
1163     "Otilde"    =>      "O\\*~",        #   capital O, tilde
1164     "otilde"    =>      "o\\*~",        #   small o, tilde
1165     "Ouml"      =>      "O\\*:",        #   capital O, dieresis or umlaut mark
1166     "ouml"      =>      "o\\*:",        #   small o, dieresis or umlaut mark
1167     "szlig"     =>      '\*8',          #   small sharp s, German (sz ligature)
1168     "THORN"     =>      '\\*(Th',       #   capital THORN, Icelandic
1169     "thorn"     =>      '\\*(th',,      #   small thorn, Icelandic
1170     "Uacute"    =>      "U\\*'",        #   capital U, acute accent
1171     "uacute"    =>      "u\\*'",        #   small u, acute accent
1172     "Ucirc"     =>      "U\\*^",        #   capital U, circumflex accent
1173     "ucirc"     =>      "u\\*^",        #   small u, circumflex accent
1174     "Ugrave"    =>      "U\\*`",        #   capital U, grave accent
1175     "ugrave"    =>      "u\\*`",        #   small u, grave accent
1176     "Uuml"      =>      "U\\*:",        #   capital U, dieresis or umlaut mark
1177     "uuml"      =>      "u\\*:",        #   small u, dieresis or umlaut mark
1178     "Yacute"    =>      "Y\\*'",        #   capital Y, acute accent
1179     "yacute"    =>      "y\\*'",        #   small y, acute accent
1180     "yuml"      =>      "y\\*:",        #   small y, dieresis or umlaut mark
1181 );
1182 }
1183