--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/booker.pl	Mon May 31 18:25:22 2004 +0000
@@ -0,0 +1,261 @@
+#!/bin/perl
+#
+#Used to prepare the book "tommath.src" for LaTeX by pre-processing it into a .tex file
+#
+#Essentially you write the "tommath.src" as normal LaTex except where you want code snippets you put
+#
+#EXAM,file
+#
+#This preprocessor will then open "file" and insert it as a verbatim copy.
+#
+#Tom St Denis
+
+#get graphics type
+if (shift =~ /PDF/) {
+   $graph = "";
+} else {
+   $graph = ".ps";
+}   
+
+open(IN,"<tommath.src") or die "Can't open source file";
+open(OUT,">tommath.tex") or die "Can't open destination file";
+
+print "Scanning for sections\n";
+$chapter = $section = $subsection = 0;
+$x = 0;
+while (<IN>) {
+   print ".";
+   if (!(++$x % 80)) { print "\n"; }
+   #update the headings 
+   if (~($_ =~ /\*/)) {
+      if ($_ =~ /\\chapter{.+}/) {
+          ++$chapter;
+          $section = $subsection = 0;
+      } elsif ($_ =~ /\\section{.+}/) {
+          ++$section;
+          $subsection = 0;
+      } elsif ($_ =~ /\\subsection{.+}/) {
+          ++$subsection;
+      }
+   }      
+
+   if ($_ =~ m/MARK/) {
+      @m = split(",",$_);
+      chomp(@m[1]);
+      $index1{@m[1]} = $chapter;
+      $index2{@m[1]} = $section;
+      $index3{@m[1]} = $subsection;
+   }
+}
+close(IN);
+
+open(IN,"<tommath.src") or die "Can't open source file";
+$readline = $wroteline = 0;
+$srcline = 0;
+
+while (<IN>) {
+   ++$readline;
+   ++$srcline;
+   
+   if ($_ =~ m/MARK/) {
+   } elsif ($_ =~ m/EXAM/ || $_ =~ m/LIST/) {
+      if ($_ =~ m/EXAM/) {
+         $skipheader = 1;
+      } else {
+         $skipheader = 0;
+      }
+      
+      # EXAM,file
+      chomp($_);
+      @m = split(",",$_);
+      open(SRC,"<$m[1]") or die "Error:$srcline:Can't open source file $m[1]";
+      
+      print "$srcline:Inserting $m[1]:";
+      
+      $line = 0;
+      $tmp = $m[1];
+      $tmp =~ s/_/"\\_"/ge;
+      print OUT "\\vspace{+3mm}\\begin{small}\n\\hspace{-5.1mm}{\\bf File}: $tmp\n\\vspace{-3mm}\n\\begin{alltt}\n";
+      $wroteline += 5;
+      
+      if ($skipheader == 1) {
+         # scan till next end of comment, e.g. skip license 
+         while (<SRC>) {
+            $text[$line++] = $_;
+            last if ($_ =~ /tommath\.h/);
+         }
+      }
+      
+      $inline = 0;
+      while (<SRC>) {
+         $text[$line++] = $_;
+         ++$inline;
+         chomp($_);
+         $_ =~ s/\t/"    "/ge;
+         $_ =~ s/{/"^{"/ge;
+         $_ =~ s/}/"^}"/ge;
+         $_ =~ s/\\/'\symbol{92}'/ge;
+         $_ =~ s/\^/"\\"/ge;
+           
+         printf OUT ("%03d   ", $line);
+         for ($x = 0; $x < length($_); $x++) {
+             print OUT chr(vec($_, $x, 8));
+             if ($x == 75) { 
+                 print OUT "\n      ";
+                 ++$wroteline;
+             }
+         }
+         print OUT "\n";
+         ++$wroteline;
+      }
+      $totlines = $line;
+      print OUT "\\end{alltt}\n\\end{small}\n";
+      close(SRC);
+      print "$inline lines\n";
+      $wroteline += 2;
+   } elsif ($_ =~ m/@\d+,.+@/) {
+     # line contains [number,text]
+     # e.g. @14,for (ix = 0)@
+     $txt = $_;
+     while ($txt =~ m/@\d+,.+@/) {
+        @m = split("@",$txt);      # splits into text, one, two
+        @parms = split(",",$m[1]);  # splits one,two into two elements 
+                
+        # now search from $parms[0] down for $parms[1] 
+        $found1 = 0;
+        $found2 = 0;
+        for ($i = $parms[0]; $i < $totlines && $found1 == 0; $i++) {
+           if ($text[$i] =~ m/\Q$parms[1]\E/) {
+              $foundline1 = $i + 1;
+              $found1 = 1;
+           }
+        }
+        
+        # now search backwards
+        for ($i = $parms[0] - 1; $i >= 0 && $found2 == 0; $i--) {
+           if ($text[$i] =~ m/\Q$parms[1]\E/) {
+              $foundline2 = $i + 1;
+              $found2 = 1;
+           }
+        }
+        
+        # now use the closest match or the first if tied
+        if ($found1 == 1 && $found2 == 0) {
+           $found = 1;
+           $foundline = $foundline1;
+        } elsif ($found1 == 0 && $found2 == 1) {
+           $found = 1;
+           $foundline = $foundline2;
+        } elsif ($found1 == 1 && $found2 == 1) {
+           $found = 1;
+           if (($foundline1 - $parms[0]) <= ($parms[0] - $foundline2)) {
+              $foundline = $foundline1;
+           } else {
+              $foundline = $foundline2;
+           }
+        } else {
+           $found = 0;
+        }
+                      
+        # if found replace 
+        if ($found == 1) {
+           $delta = $parms[0] - $foundline;
+           print "Found replacement tag for \"$parms[1]\" on line $srcline which refers to line $foundline (delta $delta)\n";
+           $_ =~ s/@\Q$m[1]\E@/$foundline/;
+        } else {
+           print "ERROR:  The tag \"$parms[1]\" on line $srcline was not found in the most recently parsed source!\n";
+        }
+        
+        # remake the rest of the line 
+        $cnt = @m;
+        $txt = "";
+        for ($i = 2; $i < $cnt; $i++) {
+            $txt = $txt . $m[$i] . "@";
+        }
+     }
+     print OUT $_;
+     ++$wroteline;
+   } elsif ($_ =~ /~.+~/) {
+      # line contains a ~text~ pair used to refer to indexing :-)
+      $txt = $_;
+      while ($txt =~ /~.+~/) {
+         @m = split("~", $txt);
+         
+         # word is the second position
+         $word = @m[1];
+         $a = $index1{$word};
+         $b = $index2{$word};
+         $c = $index3{$word};
+         
+         # if chapter (a) is zero it wasn't found
+         if ($a == 0) {
+            print "ERROR: the tag \"$word\" on line $srcline was not found previously marked.\n";
+         } else {
+            # format the tag as x, x.y or x.y.z depending on the values
+            $str = $a;
+            $str = $str . ".$b" if ($b != 0);
+            $str = $str . ".$c" if ($c != 0);
+            
+            if ($b == 0 && $c == 0) {
+               # its a chapter
+               if ($a <= 10) {
+                  if ($a == 1) {
+                     $str = "chapter one";
+                  } elsif ($a == 2) {
+                     $str = "chapter two";
+                  } elsif ($a == 3) {
+                     $str = "chapter three";
+                  } elsif ($a == 4) {
+                     $str = "chapter four";
+                  } elsif ($a == 5) {
+                     $str = "chapter five";
+                  } elsif ($a == 6) {
+                     $str = "chapter six";
+                  } elsif ($a == 7) {
+                     $str = "chapter seven";
+                  } elsif ($a == 8) {
+                     $str = "chapter eight";
+                  } elsif ($a == 9) {
+                     $str = "chapter nine";
+                  } elsif ($a == 2) {
+                     $str = "chapter ten";
+                  }
+               } else {
+                  $str = "chapter " . $str;
+               }
+            } else {
+               $str = "section " . $str     if ($b != 0 && $c == 0);            
+               $str = "sub-section " . $str if ($b != 0 && $c != 0);
+            }
+            
+            #substitute
+            $_ =~ s/~\Q$word\E~/$str/;
+            
+            print "Found replacement tag for marker \"$word\" on line $srcline which refers to $str\n";
+         }
+         
+         # remake rest of the line
+         $cnt = @m;
+         $txt = "";
+         for ($i = 2; $i < $cnt; $i++) {
+             $txt = $txt . $m[$i] . "~";
+         }
+      }
+      print OUT $_;
+      ++$wroteline;
+   } elsif ($_ =~ m/FIGU/) {
+      # FIGU,file,caption
+      chomp($_);
+      @m = split(",", $_);
+      print OUT "\\begin{center}\n\\begin{figure}[here]\n\\includegraphics{pics/$m[1]$graph}\n";
+      print OUT "\\caption{$m[2]}\n\\label{pic:$m[1]}\n\\end{figure}\n\\end{center}\n";
+      $wroteline += 4;
+   } else {
+      print OUT $_;
+      ++$wroteline;
+   }
+}
+print "Read $readline lines, wrote $wroteline lines\n";
+
+close (OUT);
+close (IN);