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subroutine to print a hexdump of a string. I saw some discussion in the CB about needing such a thing.

Update: Also see HexView by OeufMayo.

sub hdump { my $offset = 0; my(@array,$format); foreach my $data (unpack("a16"x(length($_[0])/16)."a*",$_[0])) { my($len)=length($data); if ($len == 16) { @array = unpack('N4', $data); $format="0x%08x (%05d) %08x %08x %08x %08x %s\n"; } else { @array = unpack('C*', $data); $_ = sprintf "%2.2x", $_ for @array; push(@array, ' ') while $len++ < 16; $format="0x%08x (%05d)" . " %s%s%s%s %s%s%s%s %s%s%s%s %s%s%s%s %s\n"; } $data =~ tr/\0-\37\177-\377/./; printf $format,$offset,$offset,@array,$data; $offset += 16; } }
Update: Fixed the map() in a void context problem. Thanks merlyn. For the curious, it sort of evolved into a void context as I cleaned up the subroutine before posting it to perlmonks.

In reply to Hex dump by kschwab

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