Appendix R. ASCII Table

In a book of this sort it is traditional to have an ASCII table appendix. This book does not. Instead, here is a short shell script that generates a complete ASCII table and writes it to the file ASCII.txt.

Example R-1. A script that generates an ASCII table

#!/bin/bash # ascii.sh # Script by Sebastian Arming. # Lightly modified by ABS Guide author. # Used with permission (thanks!). exec >ASCII.txt # Save stdout to file, #+ as in the example scripts #+ reassign-stdout.sh and upperconv.sh. MAXNUM=256 COLUMNS=5 OCT=8 OCTSQU=64 LITTLESPACE=-3 BIGSPACE=-5 i=1 # Decimal counter o=1 # Octal counter while [ "$i" -lt "$MAXNUM" ]; do paddi=" $i" echo -n "${paddi: $BIGSPACE} " # Column spacing. paddo="00$o" echo -ne "\\${paddo: $LITTLESPACE}" echo -n " " if (( i % $COLUMNS == 0)); then # New line. echo fi ((i++, o++)) # The octal notation for 8 is 10 and 80 -> 100. (( i % $OCT == 0)) && ((o+=2)) (( i % $OCTSQU == 0)) && ((o+=20)) # We don't have to count past 0777. done exit 0