tools

package main

import (

	"errors"

	"flag"

	"fmt"

	"io"

	"os"

	"strings"

)

var spaces, magiscule bool

var tabCount, tabWidth, width int

func main() {

	flag.BoolVar(&spaces, "spaces", false, "Use spaces instead of tabs for indentation")

	flag.IntVar(&tabCount, "tabs", 1, "Number of tabs to indent per line")

	flag.IntVar(&tabWidth, "tab-width", 4, "Number of spaces per tab")

	flag.IntVar(&width, "width", 120, "Number of characters per line, including indentation")

	flag.BoolVar(&magiscule, "magiscule", false, "Use uppercase hex digits")

	flag.Parse()

	if len(flag.Args()) < 1 {

		fmt.Println("Usage: binclude file...")

		os.Exit(-1)

	}

	for _, a := range flag.Args() {

		if err := binclude(a); err != nil {

			fmt.Println(err)

			os.Exit(-1)

		}

	}

}

func binclude(name string) error {

	file, err := os.Open(name)

	if err != nil {

		return err

	}

	defer file.Close()

	hexWidth := width - (tabCount * tabWidth)

	hexCount := ((hexWidth - 5) / 6) + 1

	buf := make([]byte, hexCount)

	for {

		n, err := file.Read(buf)

		if err != nil {

			if errors.Is(err, io.EOF) {

				break

			}

			return err

		}

		if n == 0 {

			break

		}

		if spaces {

			fmt.Print(strings.Repeat(" ", tabCount*tabWidth))

		} else {

			fmt.Print(strings.Repeat("\t", tabCount))

		}

		for i := range n {

			if magiscule {

				fmt.Printf("0x%02X, ", buf[i])

			} else {

				fmt.Printf("0x%02x, ", buf[i])

			}

		}

		fmt.Println()

	}

	return nil

}