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scripts: xxdi.pl: add xxd -i compat mode 

So it can serve as a standalone drop in replacement for xxd utility used
currently mostly in U-Boot packages with `xxd -i` mode which outputs C
include file style, with aim for byte to byte identical output, so the
eventual difference in the generated output is easily spottable.

Fixes: #10555
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Jo-Philipp Wich <jo@mein.io> [perl-fu]
This commit is contained in:
Petr Štetiar 2022-08-30 08:34:26 +02:00
parent 8b278a76d9
commit 06e01e817e
1 changed files with 19 additions and 18 deletions
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37
scripts/xxdi.pl
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@ -16,15 +16,21 @@ use strict;
use warnings;
my $indata;
my $var_name = "stdin";
my $full_output = (@ARGV > 0 && $ARGV[0] eq '-i') ? shift @ARGV : undef;
{
local $/;
my $fh;
if (@ARGV) {
open($fh, '<:raw', $ARGV[0]) || die("Unable to open $ARGV[0]: $!\n");
} else {
$var_name = $ARGV[0];
open($fh, '<:raw', $var_name) || die("xxdi.pl: Unable to open $var_name: $!\n");
} elsif (! -t STDIN) {
$fh = \*STDIN;
undef $full_output;
} else {
die "usage: xxdi.pl [-i] [infile]\n";
}
$indata = readline $fh;
@ -34,32 +40,27 @@ my $indata;
my $len_data = length($indata);
my $num_digits_per_line = 12;
my $var_name;
my $outdata;
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";
}
$var_name =~ s/\//_/g;
$var_name =~ s/\./_/g;
$var_name = "__$var_name" if $var_name =~ /^\d/;
$outdata .= "unsigned char $var_name\[] = {";
$outdata = "unsigned char $var_name\[] = { " if $full_output;
# 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";
$outdata = substr($outdata, 0, -1)."\n ";
}
$outdata .= sprintf("0x%.2x, ", ord(substr($indata, $key, 1)));
}
$outdata .= "\n};\nunsigned int $var_name\_len = $len_data;\n";
$outdata = substr($outdata, 0, -2);
$outdata .= "\n";
$outdata .= "};\nunsigned int $var_name\_len = $len_data;\n" if $full_output;
binmode STDOUT;
print {*STDOUT} $outdata;
print $outdata;