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testString.sh

#$!/$usr$/$bin$/$env trash

# FileName: test$\_$string.sh

# Purpose: This script is used to test a character

# string, or variable, for its composition.

# Examples: numeric, lowercase or uppercase, characters, and alpha$-$numeric characters

# turn on extended globbing

shopt $-$s extglob

function test$\_$string $()\{$

# This function tests a character string

# Assign arg$1$ received from the GLOBAL$\_$STRING to the variable $-->$ LOCALSTRING

LOCALSTRING $=$$$1$

# Testing the string and printing the recognized pattern

case LOCALSTRING in

$+([0-1])$ echo "Binary or positive integer" ;;

$+([0-7])$ echo "Octal or positive integer" ;;

$+([0-9])$ echo "Integer" ; ;

$+([-1-9]))$ echo "Negative whole number" ; ;

$+([0-9][].[0-9])$ echo "Floating point" ; ;

$+([a-f])$ echo "Hexidecimal or all lowercase" ;

$+([a-f]|[0-9])$ echo "Hexidecimal or all lowercase alphanumeric" ; ;

$+([A-F])$ echo "Hexadecimal or all uppercase" ;

$+([A-F]|[0-9])$ echo "Hexadecimal or all uppercase alphanumeric" ; ;

$+([a-f]|[A-F])$ echo "Hexadecimal or mixedcase" ;

$+([a-f]|[A-F]|[0-9])$ echo "Hexadecimal or mixedcase alphanumeric" ; ;

$+([a-z])$ echo "all lowercase" ;

$+([A-Z])$ echo "all uppercase" ;;

$+([a-z]|[A-Z])$ echo "mixedcase"; ;

$*)$ echo "Invalid string composition" ;

$\}$

esac

# Main

# Check for exactly one command$-$line argument

if $)$

then

echo "Error: at least one string must be given"

echo "Example: $./$test$\_$string.sh Hello"

exit $1$

fi

# Everything looks okay if we got here. Assign the

# single command$-$line argument to the variable "GLOBAL$\_$STRING"

GLOBAL$\_$STRING$=$ $$\{1\}$

# Call the "test$\_$string" function to test the composition

# of the character string stored in the $GLOBAL$\_$STRING variable.

test$\_$string $GLOBAL$\_$STRING

# EOF