Banner.go

package main

import (
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	printBanner()
}

func printBanner() {
	chCodes := []int{
		0, 0, 0, 0, 0, 0,
		12, 18, 33, 63, 33, 33,
		62, 32, 62, 33, 33, 62,
		30, 33, 32, 32, 33, 30,
		62, 33, 33, 33, 33, 62,
		63, 32, 62, 32, 32, 63,
		63, 32, 62, 32, 32, 32,
		30, 33, 32, 39, 33, 30,
		33, 33, 63, 33, 33, 33,
		4, 4, 4, 4, 4, 4,
		1, 1, 1, 1, 33, 30,
		33, 34, 60, 36, 34, 33,
		32, 32, 32, 32, 32, 63,
		33, 51, 45, 33, 33, 33,
		33, 49, 41, 37, 35, 33,
		30, 33, 33, 33, 33, 30,
		62, 33, 33, 62, 32, 32,
		30, 33, 33, 37, 34, 29,
		62, 33, 33, 62, 34, 33,
		30, 32, 30, 1, 33, 30,
		31, 4, 4, 4, 4, 4,
		33, 33, 33, 33, 33, 30,
		33, 33, 33, 33, 18, 12,
		33, 33, 33, 45, 51, 33,
		33, 18, 12, 12, 18, 33,
		17, 10, 4, 4, 4, 4,
		63, 2, 4, 8, 16, 63}

	if len(os.Args) < 2 {
		fmt.Println("Enter a text")
		return
	}
	if _, err := strconv.Atoi(os.Args[1]); err == nil {
		fmt.Println("Only text")
		return
	}

	entry := strings.ToUpper(os.Args[1])

	for j := 0; j < 6; j++ {
		for i := 0; len(entry) > i; i++ {
			chTemp := chCodes[int(rune(entry[i])-rune('A'))*6+6+j]

			for count := 6; count > 0; count-- {
				chTemp = chTemp << 1
				if (64 & chTemp) > 0 {
					fmt.Printf("#")
				} else {
					fmt.Printf(" ")
				}
			}
			fmt.Printf("\t")
		}
		fmt.Printf("\n")
	}
}