update

2 files changed, 28 insertions, 6 deletions

diff --git a/colour_test b/colour_test
index 57831f5..cbcd390 100755
--- a/colour_test
+++ b/colour_test
@@ -5,3 +5,7 @@
 source ./pb
 
 printf %b "$(pb_bg 196)$(pb_fg 254) RED $(pb_nc)\n"
+
+printf %b "$(pb_bg ABC)$(pb_fg 254) RED $(pb_nc)\n"
+
+printf %b "$(pb_bg )$(pb_fg 254) RED $(pb_nc)\n"
diff --git a/pb b/pb
index cc91933..3bbfe66 100755
--- a/pb
+++ b/pb
@@ -1,21 +1,39 @@
 #!/usr/bin/env bash
 
+# is int
+pb_isint() { 
+  if [[ $1 =~ ^[0-9]+$ ]] ; then
+    return 0
+  else
+    return 1
+  fi
+}
+
+# is number
+pb_isnum() { 
+  if [[ $1 =~ ^[+-]?([0-9]+([.][0-9]*)?|\.[0-9]+)$ ]] ; then
+    return 0
+  else
+    return 1
+  fi
+}
+
 # 256 colour functions 
 # usage:
 #  source ./pb
 #  printf %b "$(pb_bg 196)$(pb_fg 254) RED $(pb_nc)\n"
 
-pb_nc () {
+pb_nc() {
   printf '\033[0;0m';
   exit;	
 }
 
-pb_fg () {
+pb_fg() {
 
-  if [ -z "$1" ] || ! [ "$1" -eq "$1" ] >/dev/null 2>&1; then
+  if [ -z "$1" ] || ! pb_isint "$1" ; then
     return 1
   fi
-
+  
   local x
   x=$(tput colors)
 
@@ -27,9 +45,9 @@ pb_fg () {
 
 }
 
-pb_bg () {
+pb_bg() {
 
-  if [ -z "$1" ] || ! [ "$1" -eq "$1" ] >/dev/null 2>&1; then
+  if [ -z "$1" ] || ! pb_isint $1 ; then
     return 1
   fi