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-rw-r--r--vendor/github.com/mschoch/smat/actionseq.go61
1 files changed, 61 insertions, 0 deletions
diff --git a/vendor/github.com/mschoch/smat/actionseq.go b/vendor/github.com/mschoch/smat/actionseq.go
new file mode 100644
index 0000000000..6c8297f891
--- /dev/null
+++ b/vendor/github.com/mschoch/smat/actionseq.go
@@ -0,0 +1,61 @@
+// Copyright (c) 2016 Marty Schoch
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the
+// License. You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an "AS
+// IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+// express or implied. See the License for the specific language
+// governing permissions and limitations under the License.
+
+package smat
+
+// ActionSeq represents a sequence of actions, used for populating a corpus
+// of byte sequences for the corresponding fuzz tests
+type ActionSeq []ActionID
+
+// ByteEncoding runs the FSM to produce a byte sequence to trigger the
+// desired action
+func (a ActionSeq) ByteEncoding(ctx Context, setup, teardown ActionID, actionMap ActionMap) ([]byte, error) {
+ setupFunc, teardownFunc, err := actionMap.findSetupTeardown(setup, teardown)
+ if err != nil {
+ return nil, err
+ }
+ state, err := setupFunc(ctx)
+ if err != nil {
+ return nil, err
+ }
+ defer func() {
+ _, _ = teardownFunc(ctx)
+ }()
+
+ var rv []byte
+ for _, actionID := range a {
+ b, err := probeStateForAction(state, actionID)
+ if err != nil {
+ return nil, err
+ }
+ rv = append(rv, b)
+ action, ok := actionMap[actionID]
+ if !ok {
+ continue
+ }
+ state, err = action(ctx)
+ if err != nil {
+ return nil, err
+ }
+ }
+ return rv, nil
+}
+
+func probeStateForAction(state State, actionID ActionID) (byte, error) {
+ for i := 0; i < 256; i++ {
+ nextActionID := state(byte(i))
+ if nextActionID == actionID {
+ return byte(i), nil
+ }
+ }
+ return 0, ErrActionNotPossible
+}