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Open existing db #76

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merged 3 commits into from
Jun 6, 2024
Merged

Open existing db #76

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69f0915
Create factory func for existing database.
cabrador May 9, 2024
4d7c62a
Remove duplicate func
cabrador May 9, 2024
8c0338c
Merge branch 'develop' into petr/open-existing-db
cabrador May 20, 2024
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12 changes: 12 additions & 0 deletions db/base_db.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ package db
import (
"fmt"
"io"
"os"

"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
Expand Down Expand Up @@ -87,6 +88,17 @@ func MakeDefaultBaseDBFromBaseDB(db BaseDB) BaseDB {
func NewReadOnlyBaseDB(path string) (BaseDB, error) {
return newBaseDB(path, &opt.Options{ReadOnly: true}, nil, nil)
}

// OpenBaseDB opens existing database. If it does not exists error is returned instead.
func OpenBaseDB(path string) (BaseDB, error) {
_, err := os.Stat(path)
if err != nil {
return nil, err
}

return NewDefaultBaseDB(path)
}

func newBaseDB(path string, o *opt.Options, wo *opt.WriteOptions, ro *opt.ReadOptions) (*baseDB, error) {
b, err := leveldb.OpenFile(path, o)
if err != nil {
Expand Down
3 changes: 0 additions & 3 deletions types/hash.go
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Expand Up @@ -41,9 +41,6 @@ func (h Hash) Big() *big.Int { return new(big.Int).SetBytes(h[:]) }
// Bytes gets the byte representation of the underlying hash.
func (h Hash) Bytes() []byte { return h[:] }

// Big converts a hash to a big integer.
func (h Hash) Big() *big.Int { return new(big.Int).SetBytes(h[:]) }

// Compare two big int representations of h and h2.
func (h Hash) Compare(h2 Hash) int {
b1 := new(big.Int).SetBytes(h[:])
Expand Down
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