goapple2/a2/charrom.go
2014-05-10 15:10:48 -07:00

51 lines
1.0 KiB
Go

package main
import (
"io/ioutil"
"github.com/gonuts/commander"
"github.com/zellyn/goapple2/videoscan"
)
var cmdCharROM = &commander.Command{
Run: runCharROM,
UsageLine: "charrom infile outfile",
Short: "convert apple II character ROMs to text and back",
Long: `
CharROM is a simple character ROM conversion utility.
`,
}
var decompile bool
var reverse bool
func init() {
cmdCharROM.Flag.BoolVar(&decompile, "d", false, "decompile: convert from ROM to text.")
cmdCharROM.Flag.BoolVar(&reverse, "r", false, "reverse: put bits in opposite order.")
}
func runCharROM(cmd *commander.Command, args []string) error {
if len(args) != 2 {
cmd.Usage()
return nil
}
in, err := ioutil.ReadFile(args[0])
if err != nil {
panic("Cannot read file: " + args[0])
}
if decompile {
out := videoscan.BytesToText(in, reverse)
err := ioutil.WriteFile(args[1], out, 0644)
return err
}
out, err := videoscan.TextToBytes(in, reverse)
if err != nil {
return err
}
err = ioutil.WriteFile(args[1], out, 0644)
return err
}