Aegisub/traydict/unicodereplace.pl

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#!/usr/bin/perl
#############################
# unicodereplace.pl - replaces high codepoints in infile with \uHEX escapes
####
# Usage: unicodereplace.pl infile outfile
#############################
use warnings;
use strict;
use utf8;
my ($infile, $outfile) = @ARGV; # get arguments
open(INFILE, "<:utf8", $infile) or die("Can't open $infile: $!");
open(OUTFILE, ">:utf8", $outfile) or die("Can't open $outfile: $!");
# loop over lines in the infile
while (<INFILE>) {
for (split('', $_)) { # loop over characters in the line
my $cp = ord;
if ($cp < 127 or $cp == 0xFFFE or $cp == 0xFEFF) { # is it a normal ASCII codepoint or a BOM?
print OUTFILE $_; # then pass through unchanged
}
else {
print OUTFILE "\\u", sprintf("%04x", $cp); # otherwise print as \uHEX
}
}
}