pkg: add generated core package
and internal qgo tool to generate them
Change-Id: Ic03dc27262d8769f3dc3cd56fa11d77ee0b68dc8
diff --git a/pkg/encoding/hex/hex.go b/pkg/encoding/hex/hex.go
new file mode 100644
index 0000000..478632a
--- /dev/null
+++ b/pkg/encoding/hex/hex.go
@@ -0,0 +1,51 @@
+// Copyright 2018 The CUE Authors
+//
+// 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.
+
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:generate qgo -stripstr -exclude=Decode$,Encode$,EncodeToString,Dumper extract encoding/hex
+
+package hex
+
+import "encoding/hex"
+
+// EncodedLen returns the length of an encoding of n source bytes.
+// Specifically, it returns n * 2.
+func EncodedLen(n int) int {
+ return hex.EncodedLen(n)
+}
+
+// DecodedLen returns the length of a decoding of x source bytes.
+// Specifically, it returns x / 2.
+func DecodedLen(x int) int {
+ return hex.DecodedLen(x)
+}
+
+// Decode returns the bytes represented by the hexadecimal string s.
+//
+// Decode expects that src contains only hexadecimal
+// characters and that src has even length.
+// If the input is malformed, Decode returns
+// the bytes decoded before the error.
+func Decode(s string) ([]byte, error) {
+ return hex.DecodeString(s)
+}
+
+// Dump returns a string that contains a hex dump of the given data. The format
+// of the hex dump matches the output of `hexdump -C` on the command line.
+func Dump(data []byte) string {
+ return hex.Dump(data)
+}
