[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/klauspost/compress/zstd/decoder_options.go b/vendor/github.com/klauspost/compress/zstd/decoder_options.go
new file mode 100644
index 0000000..c0fd058
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/zstd/decoder_options.go
@@ -0,0 +1,83 @@
+// Copyright 2019+ Klaus Post. All rights reserved.
+// License information can be found in the LICENSE file.
+// Based on work by Yann Collet, released under BSD License.
+
+package zstd
+
+import (
+ "errors"
+ "runtime"
+)
+
+// DOption is an option for creating a decoder.
+type DOption func(*decoderOptions) error
+
+// options retains accumulated state of multiple options.
+type decoderOptions struct {
+ lowMem bool
+ concurrent int
+ maxDecodedSize uint64
+ dicts []dict
+}
+
+func (o *decoderOptions) setDefault() {
+ *o = decoderOptions{
+ // use less ram: true for now, but may change.
+ lowMem: true,
+ concurrent: runtime.GOMAXPROCS(0),
+ }
+ o.maxDecodedSize = 1 << 63
+}
+
+// WithDecoderLowmem will set whether to use a lower amount of memory,
+// but possibly have to allocate more while running.
+func WithDecoderLowmem(b bool) DOption {
+ return func(o *decoderOptions) error { o.lowMem = b; return nil }
+}
+
+// WithDecoderConcurrency will set the concurrency,
+// meaning the maximum number of decoders to run concurrently.
+// The value supplied must be at least 1.
+// By default this will be set to GOMAXPROCS.
+func WithDecoderConcurrency(n int) DOption {
+ return func(o *decoderOptions) error {
+ if n <= 0 {
+ return errors.New("concurrency must be at least 1")
+ }
+ o.concurrent = n
+ return nil
+ }
+}
+
+// WithDecoderMaxMemory allows to set a maximum decoded size for in-memory
+// non-streaming operations or maximum window size for streaming operations.
+// This can be used to control memory usage of potentially hostile content.
+// For streaming operations, the maximum window size is capped at 1<<30 bytes.
+// Maximum and default is 1 << 63 bytes.
+func WithDecoderMaxMemory(n uint64) DOption {
+ return func(o *decoderOptions) error {
+ if n == 0 {
+ return errors.New("WithDecoderMaxMemory must be at least 1")
+ }
+ if n > 1<<63 {
+ return errors.New("WithDecoderMaxmemory must be less than 1 << 63")
+ }
+ o.maxDecodedSize = n
+ return nil
+ }
+}
+
+// WithDecoderDicts allows to register one or more dictionaries for the decoder.
+// If several dictionaries with the same ID is provided the last one will be used.
+func WithDecoderDicts(dicts ...[]byte) DOption {
+ return func(o *decoderOptions) error {
+ for _, b := range dicts {
+ d, err := loadDict(b)
+ if err != nil {
+ return err
+ }
+ o.dicts = append(o.dicts, *d)
+ }
+ return nil
+ }
+}