optimized line printing

myprint.sh

@@ -21,6 +21,14 @@ function myprint {
     printf "${GRAY}$@${GRAY}\n"
 }
 
+function myprint_quiet {
+    local quiet=$1
+    local text="$2"
+    if [ "$quiet" != true ]; then
+        myprint "$text"
+    fi
+}
+
 # print message and exit
 function error {
     myprint "${RED}$@"
@@ -36,6 +44,16 @@ function ask_yn {
     return $([[ "$answ" = [Yy] ]]); 
 }
 
+function char_multiply {
+    local character="$1"
+    local length="$2"
+    i=0
+    while [ $i -lt $length ]; do
+        printf $character
+        i=$((i+1))
+    done
+}
+
 # prints horizontal line occupying whole terminal row
 # https://en.wikipedia.org/wiki/Box-drawing_characters
 function print_hline {
@@ -47,7 +65,10 @@ function print_hline {
     if [ -z "$character" ]; then
         character="-";
     fi
-    printf "${color}%.s${character}" $(seq 2 $(tput cols))
+    local term_width=$(tput cols)
+    local line_length=$((term_width - 1))
+    printf "${color}"
+    char_multiply "$character" $line_length
     printf "${GRAY}\n"
 }
 
@@ -65,10 +86,11 @@ function print_header {
     local term_width=$(tput cols)
     local label_length=${#label}
     local line_characters_count=$((term_width - label_length - 2))
-    local letf_line_length=$(( line_characters_count / 2 ))
-    local right_line_length=$(( letf_line_length + line_characters_count % 2 ))
-    printf "${color}%.s${character}" $(seq 1 $letf_line_length)
-    printf "[${label}]"
-    printf "${color}%.s${character}" $(seq 2 $right_line_length)
+    local left_line_length=$(( line_characters_count / 2 ))
+    local right_line_length=$(( left_line_length - 1 + line_characters_count % 2 ))
+    printf "${color}"
+    char_multiply "$character" $left_line_length
+    printf "[${label}]${color}"
+    char_multiply "$character" $right_line_length
     printf "${GRAY}\n"
 }