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#!/usr/bin/env perl
#
# xxdi.pl - perl implementation of 'xxd -i' mode
#
# Copyright 2013 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Copyright 2013 Linux Foundation
#
# Released under the GPLv2.
#
# Implements the "basic" functionality of 'xxd -i' in perl to keep build
# systems from having to build/install/rely on vim-core, which not all
# distros want to do. But everyone has perl, so use it instead.
#
use strict;
use warnings;
use File::Slurp qw(slurp);
my $indata = slurp(@ARGV ? $ARGV[0] : \*STDIN);
my $len_data = length($indata);
my $num_digits_per_line = 12;
my $var_name;
my $outdata;
# Use the variable name of the file we read from, converting '/' and '.
# to '_', or, if this is stdin, just use "stdin" as the name.
if (@ARGV) {
$var_name = $ARGV[0];
$var_name =~ s/\//_/g;
$var_name =~ s/\./_/g;
} else {
$var_name = "stdin";
}
$outdata .= "unsigned char $var_name\[] = {";
# trailing ',' is acceptable, so instead of duplicating the logic for
# just the last character, live with the extra ','.
for (my $key= 0; $key < $len_data; $key++) {
if ($key % $num_digits_per_line == 0) {
$outdata .= "\n\t";
}
$outdata .= sprintf("0x%.2x, ", ord(substr($indata, $key, 1)));
}
$outdata .= "\n};\nunsigned int $var_name\_len = $len_data;\n";
binmode STDOUT;
print {*STDOUT} $outdata;
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