pae2xml.pl

   1 #!/usr/bin/perl
   2
   3
   4 # Copyright (C) 2003 Rainer Typke
   5 #pae2xml is licensed under the terms of the GNU General Public License Version
   6 #2 as published by the <a href="http://www.fsf.org/" target="_top">Free Software Foundation</a>.
   7 #This gives you legal permission to copy, distribute and/or modify <em>pae2xml</em> under
   8 #certain conditions. Read
   9 #the <a href="http://www.gnu.org/copyleft/gpl.html" target="_top">online version of the license</a>
  10 #for more details. pae2xml is provided AS IS with NO WARRANTY OF ANY KIND,
  11 #INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
  12
  13
  14
  15 $divisions = 960;
  16 $old_duration = $divisions;
  17 $old_octave = 4;
  18
  19 ($mday, $mon, $year) = (localtime()) [3..5];
  20 $encoding_date = sprintf("%4d-%02d-%02d", $year + 1900, $mon+1, $mday);
  21
  22 $TIE = 0;
  23
  24 foreach $a (@ARGV) {
  25   $p = read_file($a);
  26   $toprint = "";
  27   $p =~ s/\s*\=\=+\s*(.*?)\s*\=\=+\s*/$1/sg;
  28   $p =~ s/\s*included.*?-------------*\s*(.*?)\s*/$1/s;
  29
  30   ($q, $r) = ($p, $p);
  31   if ($q !~ /^.*1\.1\.1.*$/gsx && $r =~ /^.*plain.*$/gsx) {
  32     print_error("$a contains 'plain', but not 1.1.1!\n");
  33   } else {
  34     if ($p =~ /^\s*([^\n]+)\n(.*?)\n((\d+\.\d+\.\d.*?plain.*?\n)+)(.*?)\n?([^\n]+)\n([^\n]+)\s*$/gs)    {
  35       my ($comp, $title, $incipits, $sonst, $libsig, $rismsig) = ($1, $2, $3, $5, $6, $7);
  36
  37       $toprint .= "
  38 COMPOSER:   $comp
  39 TITLE:      $title
  40 INCIPIT(S): $incipits
  41 OTHER INFO: $sonst
  42 LIB. SIGN.: $libsig
  43 RISM SIGN.: $rismsig\n\n";
  44       parse_incipits($incipits, $comp, $title, $sonst, $libsig, $rismsig);
  45     }
  46     else {
  47       if (index($p,"plain&easy") > -1) {
  48         print_error("Ignoring the following text:\n\n\n$p\n\n\n");
  49       }
  50     }
  51   }
  52 }
  53
  54
  55
  56 sub parse_incipits {
  57   my ($incipits, $comp, $title, $sonst, $libsig, $rismsig) = @_;
  58
  59   $toprint .= "parsing:   $incipits\n";
  60
  61   while ($incipits =~ /^(\d+\.\d+\..+?)(\d+\.\d+\..*)$/gs) {
  62     my ($inc1) = $1;
  63     $incipits = $2;
  64     parse_pe($inc1, $comp, $title, $sonst, $libsig, $rismsig);
  65   }
  66   parse_pe($incipits, $comp, $title, $sonst, $libsig, $rismsig);
  67 }
  68
  69 sub parse_pe {
  70   my ($pe, $comp, $title, $sonst, $libsig, $rismsig) = @_;
  71
  72   $pe =~ s/@ü/@0ü/gs; # make missing time signature explicit
  73   while ($pe =~ s/([^\-])(\d+)(\'|\,)(A|B|C|D|E|F|G)/$1$3$2$4/gs) {};  # octave first, then duration. Truly global.
  74
  75   if ($pe =~ /^\s*(\d+\.\d+\.\d)(\.|:)\s*(.*?)\nplain&easy:\s*(%([\w\-\d]+))?(@([\d\w\/]+))?\s*&?\s*(\$([^ü]+))?ü(.*)$/gs) {
  76     my ($inr, $instr, $clef, $timesig, $keysig, $rest) = ($1, $3, $5, $7, $9, $10);
  77
  78     my $filename="$rismsig-$inr.xml";
  79     $filename =~ s/RISM\s*A\/II\s*:?\s*//gs;
  80     print "Writing $filename...\n";
  81
  82     open(OUT, ">$filename");
  83
  84     if ($clef =~ /^(\w)\-(\d)$/) {
  85       ($clefsign, $clefline) = ($1, $2);
  86     } else {
  87       ($clefsign, $clefline) = ("G", 2);
  88     }
  89
  90     $timesig = timesignature($timesig);
  91
  92     my %fif=("", 0, "xF", 1, "xFC", 2, "xFCG",3, "xFCGD",4, "xFCGDA",5, "xFCGDAE",6, "xFCGDAEB",7, "bB",-1, "bBE",-2, "bBEA",-3, "bBEAD",-4, "bBEADG",-5, "bBEADGC",-6, "bBEADGCF",-7);
  93     $keysig =~ s/(\s+)|&//gs;  # it is unclear what the & means, so we'll ignore it for now.
  94     $keysig =~ s/\[|\]//gs; # IGNORING brackets around a key sig.
  95     $fifths = $fif{$keysig};
  96     if ($fifths eq "") { $fifths = "0";
  97                        print_error("Strange key signature '$keysig'.\n");}
  98
  99     foreach $_ ($rismsig,$title,$inr,$instr,$comp,$encoding_date,$libsig,$sonst)
 100     {
 101         s/
 102 //;
 103     }
 104     print OUT '<?xml version="1.0" encoding="iso-8859-1" standalone="no"?>
 105 <!DOCTYPE score-partwise PUBLIC "-//Recordare//DTD MusicXML 0.6 Partwise//EN" "file:/c:/Program Files/MusicXML/partwise.dtd">
 106 <score-partwise>
 107         <work>
 108                 <work-number>'.$rismsig.'</work-number>
 109                 <work-title>'.$title.'</work-title>
 110         </work>
 111         <movement-number>'.$inr.'</movement-number>
 112         <movement-title>'.$instr.'</movement-title>
 113         <identification>
 114                 <creator type="composer">'.$comp.'</creator>
 115                 <encoding>
 116                         <software>pae2xml by R. Typke</software>
 117                         <encoding-date>'.$encoding_date.'</encoding-date>
 118                 </encoding>
 119                 <source>'.$libsig.'</source>
 120         </identification>
 121         <part-list>
 122                 <score-part id="P1">
 123                         <part-name>'.$sonst.'</part-name>
 124                 </score-part>
 125         </part-list>
 126         <part id="P1">
 127                 <measure number="1">
 128                         <attributes>
 129                                 <divisions>'.$divisions.'</divisions>
 130                                 <key>
 131                                         <fifths>'.$fifths.'</fifths>
 132                                 </key>
 133                                 '.$timesig.'
 134                                 <clef>
 135                                         <sign>'.$clefsign.'</sign>
 136                                         <line>'.$clefline.'</line>
 137                                 </clef>
 138                         </attributes>
 139 ';
 140
 141
 142     $toprint .= "
 143 INCIPIT NO.:  $inr
 144 INSTR.:       $instr
 145 CLEF:         $clef
 146 KEY SIG.:     $keysig
 147 TIME SIG.:    $timesig
 148 REST:         $rest\n";
 149     parse_notes($rest, $keysig);
 150   }
 151   else { print_error("could not parse $pe\n"); }
 152   print OUT "   </part>
 153 </score-partwise>\n";
 154   close OUT;
 155 }
 156
 157
 158 sub parse_notes {
 159   my ($notes, $keysig) = @_;
 160   my $qq = 0; # in group of cue notes
 161
 162   my $meas = 2;   # measure number
 163   my $mopen = 1;  # measure tag still open
 164
 165   if ($notes =~ /^\s*(.*?)\s*$/) {
 166     $notes = $1;
 167   }
 168
 169   $notes =~ s/!([^!]*)!/$1$1/gs;  # write out repetitions
 170   $notes =~ s/\{([^\}]*)\}/$1/gs; # ignore beamings
 171   while ( $notes =~ s/(:?\/+:?|^)([^\/:]*)(:?\/+:?)i(:?\/+:?)/$1$2$3$2$4/gs) {}; # replace whole-measure repeats (i notation)
 172
 173   $notes =~ s/(\d+)\(([^;]+\))/\($1$2/gs;       # pull note lengths into fermatas or triplets
 174   $notes =~ s/(xx|x|bb|b|n)\(/\($1/gs;       # pull accidentals into tuplets or fermatas:
 175   $notes =~ s/(\d+)(xx|x|bb|b|n)(A|B|C|D|E|F|G)/$2$1$3/gs;  # accidentals first, then duration
 176
 177 #  $notes =~ s/x\(/\(x/gs;       # pull accidentals into tuplets or fermatas
 178 #  $notes =~ s/bb\(/\(bb/gs;       # pull accidentals into tuplets or fermatas
 179 #  $notes =~ s/b\(/\(b/gs;       # pull accidentals into tuplets or fermatas
 180 #  $notes =~ s/n\(/\(n/gs;       # pull accidentals into tuplets or fermatas
 181   #  $notes =~ s/(\'+|\,+)\(/\($1/g;       # pull octave marks into tuplets or fermatas
 182
 183   $notes =~ s/(\.|\d|\,|\')qq/qq$1/gs; # pull beginning mark of group of grace notes in front of corresponding notes
 184   $notes =~ s/(xx|x|bb|b|n)qq/qq$1/gs;  # qq first, then parts of notes
 185
 186   $notes =~ s/\=(\d)/$1/gs; # replace multibar rests #n with just n
 187
 188   while ($notes ne "") {
 189     if ($notes =~ /^(\'+|\,+)(.*)$/) {  # Octave marks
 190       ($oct, $notes) = ($1, $2);
 191       octave($oct);
 192     } elsif ($notes =~ /^qq(.*)$/) {  # Begin grace
 193       $notes = $1;
 194       $qq = 1;
 195     } elsif ($notes =~ /^r(.*)$/) {  # End grace
 196       $notes = $1;
 197       $qq = 0;
 198     } elsif ($notes =~ /^(\d+|\=)(\/.*)$/) {  # normal and multi-measure rests
 199       $measrest = $1;
 200       $notes = $2;
 201       if ($measrest eq '=') {
 202         $measrest = 1;
 203       }
 204       $toprint .= "$measrest measures of rest.\n";
 205       for $n (1..$measrest) {
 206         print OUT '                     <note>
 207                                 <rest />
 208                                 <duration>'.($beats*$divisions*4/$beattype).'</duration>
 209 '.#                             <type>quarter</type>
 210 '
 211                         </note>
 212 ';
 213         if ($n < $measrest) {
 214           print OUT "           </measure>\n";
 215           if ($notes ne "") {
 216             print OUT '         <measure number="'.$meas.'">
 217 ';
 218             $meas++;
 219           } else {
 220             $mopen = 0;
 221           }
 222         }
 223       }
 224     } elsif ($notes =~ /^((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?)(.*)$/) {  # a note
 225       ($note, $notes) = ($1,$6);
 226       parse_note($note, $keysig, "", "", $qq);
 227     } elsif ($notes =~ /^(\((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?\))(.*)$/) {  # one note with a fermata
 228       ($note, $notes) = ($1,$6);
 229       parse_note($note, $keysig, "", "", $qq);
 230     } elsif ($notes =~ /^(\(((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?){3}\))(.*)$/) {  # a triplet
 231       ($triplet, $notes) = ($1,$7);
 232       #      print "TRIPLET: ".$triplet." -> ";
 233       $triplet =~ /^\(((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?)(.*)\)$/gs;
 234       ($note, $triplet) = ($1,$6);
 235       #print "$note $triplet\n";
 236       parse_note($note, $keysig, '<tuplet type="start"/>', '                            <time-modification>
 237                                         <actual-notes>3</actual-notes>
 238                                         <normal-notes>2</normal-notes>
 239                                 </time-modification>', $qq);
 240       $triplet =~ /^((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?)(.*)$/gs;
 241       ($note, $triplet) = ($1,$6);
 242       #print "$note $triplet\n";
 243       parse_note($note, $keysig,  '', '                         <time-modification>
 244                                         <actual-notes>3</actual-notes>
 245                                         <normal-notes>2</normal-notes>
 246                                 </time-modification>', $qq);
 247       parse_note($triplet,  $keysig, '<tuplet type="stop"/>',  '                                <time-modification>
 248                                         <actual-notes>3</actual-notes>
 249                                         <normal-notes>2</normal-notes>
 250                                 </time-modification>', $qq);
 251     } elsif ($notes =~ /^((\d+)\(((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?)+\;(\d+)\))(.*)$/)  {  # an n-tuplet
 252       ($tuplet, $notes) = ($1,$9);
 253       #      print "N-TUPLET: ".$tuplet." -> ";
 254       $tuplet =~ /^(\d+)\(((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?)(.*);(\d)\)$/gs;
 255       ($combdur, $note, $tuplet, $numval) = ($1,$2,$7,$8);
 256       #print "i=$combdur, n=$numval; $note / $tuplet\n";
 257       my $ind_dur = duration($combdur)/$numval;
 258       # my $norm_notes =
 259       my $act_notes = $numval;
 260       parse_note($note, $keysig, '<tuplet type="start"/>', '                            <time-modification>
 261                                         <actual-notes>'.$act_notes.'</actual-notes>
 262                                         <normal-notes>1</normal-notes>
 263                                 </time-modification>', $qq);
 264       while ($tuplet =~ /^((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?)(.+)$/gs) {
 265         ($note, $tuplet) = ($1,$6);
 266         #print "$note / $tuplet\n";
 267         parse_note($note, $keysig,  '', '                               <time-modification>
 268                                         <actual-notes>'.$act_notes.'</actual-notes>
 269                                         <normal-notes>1</normal-notes>
 270                                 </time-modification>', $qq);
 271       }
 272       parse_note($tuplet,  $keysig, '<tuplet type="stop"/>',  '                         <time-modification>
 273                                         <actual-notes>'.$act_notes.'</actual-notes>
 274                                         <normal-notes>1</normal-notes>
 275                                 </time-modification>', $qq);
 276     } elsif ($notes =~ /^(%\w-\d)(.*)$/) {  # Clef change
 277       ($clef,$notes) = ($1,$2);
 278       $clef =~ /^%(\w)\-(\d)$/;
 279       ($clefsign, $clefline) = ($1, $2);
 280       print OUT '                       <attributes>
 281                                 <clef>
 282                                         <sign>'.$clefsign.'</sign>
 283                                         <line>'.$clefline.'</line>
 284                                 </clef>
 285                         </attributes>
 286 ';
 287     } elsif ($notes =~ /^@(\d\/\d|c\/?)\s*(.*)$/) {  # time signatue change
 288       # print "$notes\n";
 289       ($timesig,$notes) = ($1,$2);
 290       #print "-> $timesig / $notes\n"; exit;
 291       $timesig = timesignature($timesig);
 292       print OUT "                       <attributes>\n$timesig
 293                         </attributes>\n";
 294     } elsif ($notes =~ /^(:?\/+:?)(.*)$/) {  # Barline (and repeats)
 295       $barline = $1;
 296       $notes = $2;
 297       if ($barline =~ /^:\/\/:/) {
 298         print OUT '                     <barline location="right">
 299                                 <bar-style>light-light</bar-style>
 300                                 <repeat direction="backward"/>
 301                         </barline>
 302 ';
 303       } elsif ($barline =~ /^:\/\/$/ ) {
 304           print OUT '                   <barline location="right">
 305                                 <bar-style>light-heavy</bar-style>
 306                                 <repeat direction="backward"/>
 307                         </barline>
 308 ';
 309       } elsif ($barline =~ /^\/\/$/) {
 310         print OUT '                     <barline location="right">
 311                                 <bar-style>light-light</bar-style>
 312                                 <repeat direction="backward"/>
 313                         </barline>
 314 ';
 315       }
 316       print OUT "               </measure>\n";
 317       if ($notes ne "") {
 318         print OUT '             <measure number="'.$meas.'">
 319 ';
 320         if ($barline =~ /^\/\/:$/) {
 321           print OUT '                   <barline location="left">
 322                                 <bar-style>heavy-light</bar-style>
 323                                 <repeat direction="forward"/>
 324                         </barline>
 325 ';
 326         } elsif ($barline =~ /^:\/\/:$/) {
 327           print OUT '                   <barline location="left">
 328                                 <repeat direction="forward"/>
 329                         </barline>
 330 ';
 331         }
 332         print OUT $clefattr;
 333         $meas++;
 334       } else {
 335         $mopen = 0;
 336       }
 337       $toprint .= "bar line\n";
 338     } #elsif ($notes =~ /^(\d*\.*\-)(.*)$/) {
 339       #($rst, $notes) = ($1, $2);
 340       #$toprint .= "rest: $rst\n";
 341       #$rst =~ /^(\d*)(\.*)\-$/;
 342       #($rst, $dots) =($1,$2);
 343       #print OUT '                      <note>
 344         #                       <rest />
 345         #                       <duration>'.duration($rst, $dots).'</duration>
 346 #'.#                            <type>quarter</type>
 347 #'
 348 #                       </note>
 349 #';
 350     elsif ($notes =~ /^\((\=)\)(.*)$/) {  # a bar of rest with a fermata
 351       ($rst, $notes) = ($1, $2);
 352       $toprint .= "rest: $rst\n";
 353       print OUT '                       <note>
 354                                 <rest />
 355                                 <duration>'.($beats*$divisions*4/$beattype).'</duration>
 356 '.#                             <type>quarter</type>
 357 '                               <notations>
 358                                         <fermata type="upright"/>
 359                                 </notations>
 360                         </note>
 361 ';
 362     }
 363     elsif ($notes =~ s/(\d+\.*)\(((\,|\')*(x|xx|b|bb|n)?\d*\.*(g|q)?(\-|A|B|C|D|E|F|G)t?\+?)\)/\($1$2\)/gs) { # pull duration into fermata parentheses
 364       #      print "after replacement: $notes\n"; exit;
 365     }
 366     else {
 367       print_error("got stuck with $notes\n");
 368       $notes = "";
 369     }
 370   }
 371   if ($mopen) {
 372     print OUT "         </measure>\n";
 373   }
 374 }
 375
 376
 377 sub parse_note {
 378   my($note, $keysig, $notation, $addition, $in_qq_group) = @_;
 379
 380   my ($fermata) = (0);
 381   my ($actualnotes, $normalnotes) = (1,1);
 382
 383   if ($addition =~ /^\s*<time-modification>\s*<actual-notes>\s*(\d+)\s*<\/actual-notes>\s*<normal-notes>\s*(\d+)\s*<\/normal-notes>\s*<\/time-modification>\s*$/) {
 384     ($actualnotes, $normalnotes) = ($1, $2);
 385   }
 386
 387   if ($note =~ /^\((.*)\)$/) {
 388     $note = $1;
 389     $fermata = 1;
 390   }
 391
 392   $note =~ /^((\,|\')*)(x|xx|b|bb|n)?(\d*)(\.*)(g|q)?(\-|A|B|C|D|E|F|G)(t?)(\+?)$/;
 393   my ($oct, $acc, $dur, $dot, $gracecue, $pitch, $trill, $tie) = ($1, $3, $4, $5, $6, $7, $8, $9);
 394
 395   print OUT '                   <note>
 396 ';
 397   if ($gracecue eq "g") {
 398     print OUT '         <grace steal-time-following="33"/>
 399 ';
 400   }
 401   if ($gracecue eq "q" || $in_qq_group) {
 402     print OUT '         <cue/>
 403 ';
 404   }
 405   if ($pitch eq "-") {
 406     print OUT "                 <rest />\n";
 407   } else {
 408     print OUT '                         <pitch>
 409                                         <step>'.$pitch.'</step>
 410 '.
 411    alter($pitch, $acc, $keysig).'
 412                                         <octave>'.octave($oct).'</octave>
 413                                 </pitch>
 414 ';
 415   }
 416   if ($gracecue ne "g") {
 417     print OUT '                         <duration>'.(duration($dur, $dot)*$normalnotes/$actualnotes).'</duration>
 418 ';
 419   }
 420 #                               <type>quarter</type>
 421
 422   if ($tie eq "+") {
 423     if (!$TIE) {
 424       $TIE = 1;
 425       print OUT '<tie type="start"/>
 426 ';
 427     }
 428   } else {
 429     if ($TIE) {
 430       print OUT '<tie type="stop"/>
 431 ';
 432       $TIE = 0;
 433     }
 434   }
 435
 436   print OUT $addition;
 437
 438   my $notationbracket = $fermata || ($trill eq "t") || ($notation ne "");
 439   if ($notationbracket) {
 440     print OUT "                         <notations>\n";
 441   }
 442   if ($fermata) { print OUT '
 443                                         <fermata type="upright"/>'."\n"; }
 444   if ($trill eq "t") { print OUT '                                      <ornaments>
 445                                                 <trill-mark/>
 446                                         </ornaments>
 447 ';
 448                      }
 449   if ($notation ne "") {
 450     print OUT "                         $notation\n";
 451   }
 452   if ($notationbracket) {
 453     print OUT "                         </notations>\n";
 454   }
 455
 456   print OUT '                   </note>
 457 ';
 458
 459   $toprint .= "note: oct. $oct/acc. $acc/dur. $dur/dots $dot/grace,cue $gracecue/pitch $pitch\n";
 460 }
 461
 462 sub alter {
 463   my ($pitch, $acc, $keysig) = @_;
 464
 465   my $alt = 0;
 466
 467   if (index ($keysig,$pitch) > -1) {
 468     $keysig =~ /^(.).*$/gs;
 469     if ($1 eq 'x') {
 470       $alt = 1;
 471     } else {$alt = -1;}
 472   }
 473
 474   my %acc_alt = ("n", 0, "b", -1, "bb", -2, "x", 1, "xx", 2);
 475   if ($acc_alt{$acc} ne "") {
 476     $alt = $acc_alt{$acc};
 477   }
 478
 479   if ($alt != 0) {
 480     return "<alter>$alt</alter>\n";
 481   }
 482   return "";
 483 }
 484
 485 sub duration {
 486   my ($duration, $dots) = @_;
 487
 488   if ($duration.$dots ne "") {
 489     my %du=("1",4*$divisions,"2",2*$divisions,"4",$divisions,
 490             "8",$divisions/2,"6",$divisions/4,"3",$divisions/8,
 491             "5",$divisions/16,"7",$divisions/32,
 492             "9",$divisions*8,"0",$divisions*16); # breve/long
 493     $old_duration = $du{$duration};
 494     if ($old_duration eq "") {
 495       print_error("strange duration '$duration'\n");
 496     }
 497     my $add = $old_duration;
 498     while ($dots ne "") {
 499       $add /= 2;
 500       $old_duration += $add;
 501       $dots =~ /^.(.*)$/gs;
 502       $dots = $1;
 503     }
 504   }
 505   return $old_duration;
 506 }
 507
 508 sub octave {
 509   my ($octave) = @_;
 510
 511   if ($octave ne "") {
 512     $octave =~ /^(.)(.*)$/gs;
 513     if ($1 eq ",") {
 514       $old_octave = 4 - length $octave;
 515     } else {
 516       $old_octave = 3 + length $octave;
 517     }
 518   }
 519   return $old_octave;
 520 }
 521
 522 sub timesignature {
 523   my ($timesig) = @_;
 524
 525   if ($timesig eq "c3") {
 526     $timesig = "3/2";  # it would be better to display it as "C". Example: 451.023.814
 527   }
 528   if ($timesig =~ /^c(\d+)\/(\d+)$/gs) {
 529     $timesig = "$1/$2";  # it would be better to show the "C"
 530   }
 531
 532   if ($timesig eq "0" || $timesig eq "") {  # unclear how to handle absence of time signature.
 533     $timesig ='<time symbol="common">
 534       <beats>4</beats>
 535       <beat-type>4</beat-type>
 536     </time>
 537 ';  # using 4/4 for now.
 538     ($beats, $beattype) = (4,4);
 539   } elsif ($timesig =~ /^c(\/?)$/gi) {
 540     if ($1 eq "/") {
 541       $timesig = '<time symbol="cut">
 542       <beats>2</beats>
 543       <beat-type>2</beat-type>
 544     </time>
 545 ';
 546       ($beats, $beattype) = (2,2);
 547     } else {
 548       $timesig = '<time symbol="common">
 549       <beats>4</beats>
 550       <beat-type>4</beat-type>
 551     </time>
 552 ';
 553       ($beats, $beattype) = (4,4);
 554     }
 555   } elsif ($timesig =~ /^(\d+)\/(\d+)$/gs) {
 556     ($beats, $beattype) = ($1, $2);
 557     $timesig = '<time>
 558       <beats>'.$beats.'</beats>
 559       <beat-type>'.$beattype.'</beat-type>
 560     </time>
 561 ';
 562   } else {
 563     print_error("Time signature '$timesig' looks strange.\n");
 564     #   $timesig = "";   we assume 4/4 just to  get something legible:
 565     ($beats, $beattype) = (4,4);
 566     $timesig = '<time>
 567       <beats>'.$beats.'</beats>
 568       <beat-type>'.$beattype.'</beat-type>
 569     </time>
 570 ';
 571   }
 572   return $timesig;
 573 }
 574
 575 sub print_error {
 576   my ($msg) = @_;
 577
 578   print "\nAn error occurred; context:\n\n$toprint\n
 579 Error: $msg\n";
 580 }
 581
 582 sub read_file {
 583   my ($fn) = @_;
 584   my $res = "";
 585   if ($fn eq "-") {
 586       while (<STDIN>) { $res .= $_; } # read all lines
 587   } else {
 588     if (!(open FH, $fn)) {
 589       return "";
 590     }
 591     while (<FH>) { $res .= $_; } # read all lines
 592     close (FH);
 593   }
 594   return $res;
 595 }