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authorLuke Shumaker <lukeshu@lukeshu.com>2022-07-10 13:18:30 -0600
committerLuke Shumaker <lukeshu@lukeshu.com>2022-07-10 13:35:20 -0600
commit27401b6ea459921a6152ab1744da1618358465f4 (patch)
tree2c4f9c096f1a593e65d7f824901e815ca48bfaf0 /pkg/util/ref.go
parent42f6f78e0a32ba0eda707154f8e1ffb4579604ee (diff)
Rename the module, mv pkg lib
Diffstat (limited to 'pkg/util/ref.go')
-rw-r--r--pkg/util/ref.go54
1 files changed, 0 insertions, 54 deletions
diff --git a/pkg/util/ref.go b/pkg/util/ref.go
deleted file mode 100644
index aecfb9f..0000000
--- a/pkg/util/ref.go
+++ /dev/null
@@ -1,54 +0,0 @@
-package util
-
-import (
- "fmt"
- "io"
-
- "lukeshu.com/btrfs-tools/pkg/binstruct"
-)
-
-type File[A ~int64] interface {
- Name() string
- Size() (A, error)
- ReadAt(p []byte, off A) (n int, err error)
- WriteAt(p []byte, off A) (n int, err error)
-}
-
-var (
- _ io.WriterAt = File[int64](nil)
- _ io.ReaderAt = File[int64](nil)
-)
-
-type Ref[A ~int64, T any] struct {
- File File[A]
- Addr A
- Data T
-}
-
-func (r *Ref[A, T]) Read() error {
- size := binstruct.StaticSize(r.Data)
- buf := make([]byte, size)
- if _, err := r.File.ReadAt(buf, r.Addr); err != nil {
- return err
- }
- n, err := binstruct.Unmarshal(buf, &r.Data)
- if err != nil {
- return err
- }
- if n != size {
- return fmt.Errorf("util.Ref[%T].Read: left over data: read %v bytes but only consumed %v",
- r.Data, size, n)
- }
- return nil
-}
-
-func (r *Ref[A, T]) Write() error {
- buf, err := binstruct.Marshal(r.Data)
- if err != nil {
- return err
- }
- if _, err = r.File.WriteAt(buf, r.Addr); err != nil {
- return err
- }
- return nil
-}