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Add []byte to repo.LoadAndDecrypt and utils.LoadAll

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This commit changes the signatures for repository.LoadAndDecrypt and
utils.LoadAll to allow passing in a []byte as the buffer to use. This
buffer is enlarged as needed, and returned back to the caller for
further use.

In later commits, this allows reducing allocations by reusing a buffer
for multiple calls, e.g. in a worker function.
This commit is contained in:
Alexander Neumann
2019-04-13 13:38:39 +02:00
parent e046428c94
commit d51e9d1b98
10 changed files with 112 additions and 71 deletions
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internal/restic/repository.go
+5 -2
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@@ -39,8 +39,11 @@ type Repository interface {
SaveUnpacked(context.Context, FileType, []byte) (ID, error)
SaveJSONUnpacked(context.Context, FileType, interface{}) (ID, error)
LoadJSONUnpacked(context.Context, FileType, ID, interface{}) error
LoadAndDecrypt(context.Context, FileType, ID) ([]byte, error)
LoadJSONUnpacked(ctx context.Context, t FileType, id ID, dest interface{}) error
// LoadAndDecrypt loads and decrypts the file with the given type and ID,
// using the supplied buffer (which must be empty). If the buffer is nil, a
// new buffer will be allocated and returned.
LoadAndDecrypt(ctx context.Context, buf []byte, t FileType, id ID) (data []byte, err error)
LoadBlob(context.Context, BlobType, ID, []byte) (int, error)
SaveBlob(context.Context, BlobType, []byte, ID) (ID, error)