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hashing.go
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/
hashing.go
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package rom
import (
"crypto/md5"
"crypto/sha1"
"encoding/hex"
"hash"
"io"
"os"
)
func FileMD5(path string) (string, error) {
return hashToHex(path, md5.New())
}
func FileSHA1(path string) (string, error) {
return hashToHex(path, sha1.New())
}
func hashToHex(path string, hasher hash.Hash) (string, error) {
var hexHash string
file, err := os.Open(path)
if err != nil {
return hexHash, err
}
defer file.Close()
if _, err := io.Copy(hasher, file); err != nil {
return hexHash, err
}
hashBytes := hasher.Sum(nil)
return hex.EncodeToString(hashBytes), nil
}
func (romfile *RomFile) AddMD5() error {
md5hex, err := FileMD5(romfile.File.Path)
if err != nil {
return err
}
romfile.File.MD5 = md5hex
return nil
}
func (romfile *RomFile) AddSHA1() error {
sha1hex, err := FileSHA1(romfile.File.Path)
if err != nil {
return err
}
romfile.File.SHA1 = sha1hex
return nil
}
func (romfile *RomFile) AddHashes() error {
md5res := make(chan error)
sha1res := make(chan error)
go func(errs chan error) {
errs <- romfile.AddMD5()
}(md5res)
go func(errs chan error) {
errs <- romfile.AddSHA1()
}(sha1res)
if err := <-md5res; err != nil {
return err
}
if err := <-sha1res; err != nil {
return err
}
return nil
}