sanchayanmaity/xv6-cs450
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

better page breaks

Browse source
This commit is contained in:
rsc 2006-09-07 13:07:29 +00:00
parent 44e6909a6d
commit 7678a19ecf
1 changed files with 89 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

95
runoff
View file

@ -16,13 +16,94 @@ files=`grep -v '^#' runoff.list | awk '{print $1}'`
n=99
for i in $files
do
awk -v 'n='$n '
BEGIN{n=int((n+49)/50)*50-1; nb=0; nr=0}
NF==0 { nb++; next }
{for(i=0; i<nb; i++) printf("%04d\n", n+ ++nr); nb=0; printf("%04d %s\n", n+ ++nr, $0)}
END{for(nr++; nr%50 != 1; nr++) printf("%04d\n", n+nr);}
perl -e '$n='$n';' -e '
$n = int(($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;
}
}
' $i >fmt/$i
n=`tail -1 fmt/$i | awk '{print $1}'`
nn=`tail -1 fmt/$i | sed 's/ .*//; s/^0*//'`
if [ "x$nn" != x ]; then
n=$nn
fi
done
# create table of contents
@ -117,7 +198,7 @@ awk '
# format the whole thing
(
pr -l60 -e8 README
pr -l60 -e8 -2 toc
pr -l60 -h "table of contents" -e8 -2 toc
pr -l60 -h "definitions" -2 t.defs | pad
pr -l60 -h "cross-references" -2 refs | pad
for i in $files