#!/usr/bin/env perl

use warnings;

# For gzip compression

use IO::Compress::Gzip qw(gzip $GzipError);

# Incoming arguments

my $sourceFile = $ARGV[0];

my $destFile = $ARGV[1];

my $varName = $ARGV[2];

# Read in and compress the source file

my $compressed;

gzip $sourceFile => \$compressed, BinModeIn => 1

or die "Could not compress source data: $GzipError";

# Split into bytes

my @bytes = unpack('C*', $compressed);

# Convert to a list of uint8_t values appropriate for an array in C

my $cArray = "";

my $index;

my $length = scalar @bytes;

for ($index = 0; $index < $length; $index++)

{

$cArray .= sprintf("0x%02x, ", $bytes[$index]);

if ($index % 16 == 15)

{

$cArray .= "\n\t";

}

}

# Tidy up the output

if ($index % 16 == 0)

{

substr($cArray, -4) = "";

}

else

{

substr($cArray, -2) = "";

}

# Write to the output file

open OUTPUT, ">$destFile"

or die "Could not open output file \"$destFile\": $!";

print OUTPUT "unsigned char ${varName}[] = \n{\n\t$cArray\n};\n";

print OUTPUT "unsigned int ${varName}_length = $length;\n";

close OUTPUT;