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serial.go
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serial.go
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package psxserialnumber
import (
"errors"
"io"
"os"
"regexp"
"strings"
)
const serialRegex string = "((SLPS|SLES|SLUS|SCPS|SCUS|SCES|SIPS|SLPM|SLEH|SLED|SCED|ESPM|PBPX|LSP)[_P\\-])|(LSP9|907127)"
const serialCodeDotPosition int = 8
const serialCodeLength int = 11
const bufferSize int = 1024 * 1024
// ErrSerialNotFound returned when the serial can not be found
var ErrSerialNotFound = errors.New("Serial not found")
var serialExceptions = map[string]string{
"SLUSP": "SLUS_",
"LSP9": "LSP_9",
"907127": "LSP_907127",
}
var m = regexp.MustCompile(serialRegex)
// GetSerial returns the serial for the given PSX bin file
func GetSerial(filepath string) (serial string, err error) {
file, err := os.Open(filepath)
if err != nil {
return serial, err
}
defer file.Close()
buffer := make([]byte, bufferSize)
for {
bytesread, err := file.Read(buffer)
if err != nil {
if err != io.EOF {
return serial, err
}
break
}
serial = findSerial(string(buffer[:bytesread]))
if serial != "" {
serial = normalizeSerial(serial)
break
}
}
if serial == "" {
err = ErrSerialNotFound
}
return serial, err
}
func findSerial(s string) string {
serialPosition := m.FindStringIndex(s)
if len(serialPosition) > 0 {
return s[serialPosition[0] : serialPosition[0]+serialCodeLength]
}
return ""
}
func normalizeSerial(s string) string {
serial := strings.Replace(s, ".", "", 1)
serial = strings.Replace(serial, "-", "_", 1)
serial = strings.Replace(serial, "-", "", 1)
for key, value := range serialExceptions {
if strings.Contains(serial, key) {
serial = strings.Replace(serial, key, value, 1)
}
}
return serial[:serialCodeDotPosition] + "." + serial[serialCodeDotPosition:serialCodeLength-1]
}