feat(unitproc/bktemp-checkInt):Add integer check function

diff --git a/unitproc/bktemp-checkInt b/unitproc/bktemp-checkInt
new file mode 100644 (file)
index 0000000..cfe396e
--- /dev/null
+++ b/unitproc/bktemp-checkInt
@@ -0,0 +1,53 @@
+#!/bin/bash
+# Desc: Checks if arg is an integer
+
+#==BEGIN Define script parameters==
+#===BEGIN Declare local script functions===
+yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
+die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
+try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
+checkInt() {
+    # Desc: Checks if arg is integer
+    # Usage: checkInt arg
+    # Input: arg: integer
+    # Output: - return code 0 (if arg is integer)
+    #         - return code 1 (if arg is not integer)
+    # Example: if ! checkInt $arg; then echo "not int"; fi;
+    # Version: 0.0.1
+    local returnState
+
+    #===Process Arg===
+    if [[ $# -ne 1 ]]; then
+       die "ERROR:Invalid number of arguments:$#";
+    fi;
+    
+    RETEST1='^[0-9]+$'; # Regular Expression to test
+    if [[ ! $1 =~ $RETEST1 ]] ; then
+       returnState="false";
+    else
+       returnState="true";
+    fi;
+
+    #===Determine function return code===
+    if [ "$returnState" = "true" ]; then
+       return 0;
+    else
+       return 1;
+    fi;
+} # Checks if arg is integer
+
+#===END Declare local script functions===
+#==END Define script parameters==
+
+#==BEGIN test code==
+if checkInt 4; then yell "success"; fi;
+sleep 1;
+if checkInt "foo"; then yell "success"; else yell "fail"; fi;
+sleep 1;
+if checkInt "foo" "bar" "baz" 1; then yell "success"; else yell "fail"; fi;
+sleep 1;
+if checkInt; then yell "success"; else yell "fail"; fi;
+#==END test code==
+
+# Author: Steven Baltakatei Sandoval
+# License: GPLv3+