runoff changes

runoff1

@@ -0,0 +1,90 @@
+#!/usr/bin/perl
+
+$n = 0;
+if($ARGV[0] eq "-n") {
+	$n = $ARGV[1];
+	shift @ARGV;
+	shift @ARGV;
+}
+$n = int(($n+49)/50)*50 - 1;
+
+@lines = <>;
+foreach (@lines) {
+	chomp;
+	s/\s+$//;
+	if(length() >= 75){
+		print "$ARGV[0]:$.: line too long";
+	}
+}
+@outlines = ();
+$nextout = 0;
+
+for($i=0; $i<@lines; ){
+	# Skip leading blank lines.
+	$i++ while $i<@lines && $lines[$i] =~ /^$/;
+	last if $i>=@lines;
+
+	# If the rest of the file fits, use the whole thing.
+	if(@lines <= $i+50){
+		$breakbefore = @lines;
+	}else{
+		# Find a good next page break;
+		# Hope for end of function.
+		# but settle for a blank line (but not first blank line
+		# in function, which comes after variable declarations).
+		$breakbefore = $i;
+		$lastblank = $i;
+		$sawbrace = 0;
+		$breaksize = 15;  # 15 lines to get to function
+		for($j=$i; $j<$i+50 && $j < @lines; $j++){
+			if($lines[$j] =~ /PAGEBREAK:\s*([0-9]+)/){
+				$breaksize = int($2);
+				$breakbefore = $j;
+				$lines[$j] = "";
+			}
+			if($lines[$j] =~ /^}$/){
+				$breakbefore = $j+1;
+			}
+			if($lines[$j] =~ /^{$/){
+				$sawbrace = 1;
+			}
+			if($lines[$j] =~ /^$/){
+				if($sawbrace){
+					$sawbrace = 0;
+				}else{
+					$lastblank = $j;
+				}
+			}
+		}
+		if($j<@lines && $lines[$j] =~ /^$/){
+			$lastblank = $j;
+		}
+		
+		# If we are not putting enough on a page, try a blank line.
+		if($breakbefore - $i < 50 - $breaksize && $lastblank > $breakbefore && $lastblank >= $i+50 - 5){
+			$breakbefore = $lastblank;
+			$breaksize = 5;  # only 5 lines to get to blank line
+		}
+
+		# If we are not putting enough on a page, force a full page.
+		if($breakbefore - $i < 50 - $breaksize && $breakbefore != @lines){
+			$breakbefore = $i + 50;
+			$breakbefore = @lines if @lines < $breakbefore;
+		}
+
+		if($breakbefore < $i+2){
+			$breakbefore = $i+2;
+		}
+	}
+
+	# Emit the page.
+	$i50 = $i + 50;
+	for(; $i<$breakbefore; $i++){
+		printf "%04d %s\n", ++$n, $lines[$i];
+	}
+
+	# Finish page
+	for($j=$i; $j<$i50; $j++){
+		printf "%04d \n", ++$n;
+	}
+}