;# Usage: &look(*FILEHANDLE,$key,$dict,$fold)
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
# In particular, this should not be used as an example of modern Perl
# programming techniques.
;# Sets file position in FILEHANDLE to be first line greater than or equal
;# (stringwise) to $key. Pass flags for dictionary order and case folding.
local(*FH
,$key,$dict,$fold) = @_;
local($max,$min,$mid,$_);
local($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,
$blksize,$blocks) = stat(FH
);
$blksize = 8192 unless $blksize;
$key =~ s/[^\w\s]//g if $dict;
$max = int($size / $blksize);
while ($max - $min > 1) {
$mid = int(($max + $min) / 2);
seek(FH
,$mid * $blksize,0);
$_ = <FH
> if $mid; # probably a partial line