awkbin

bin2hex

#!/bin/sh

export LANG=C LC_ALL=C
LF=$(printf '\\\n_'); LF=${LF%_}
od -A n -t x1 -v                  |
tr -Cd '0123456789accdefABCDEF\n' |
tr 'abcdef' 'ABCDEF'              |
sed "s/../&$LF/g"                 |
grep -v '^$'

dec2bin

#!/bin/sh

export LANG=C LC_ALL=C

awk '
  BEGIN {
    MAXLENFMTSTR = 2048 - length("printf ");
    for (i=1; i<256; i++) {
      fmt[i] = sprintf

hex2dec

#!/bin/sh

export LANG=C LC_ALL=C

bcrc=$(mktemp)
echo 'obase=10;ibase=16;' >$bcrc

tr 'abcdef' 'ABCDEF'    |
bc $bcrc

rm $bcrc