From cf19586cfbe5aa379c8fdb046dc5a8c0fa1cebbb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Sat, 6 May 2017 18:35:59 +0300
Subject: common/bitutil: fix decompression corner cases; fuzz, test & bench

---
 common/bitutil/compress_fuzz.go | 56 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 common/bitutil/compress_fuzz.go

(limited to 'common/bitutil/compress_fuzz.go')

diff --git a/common/bitutil/compress_fuzz.go b/common/bitutil/compress_fuzz.go
new file mode 100644
index 000000000..2b7fe2977
--- /dev/null
+++ b/common/bitutil/compress_fuzz.go
@@ -0,0 +1,56 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// +build gofuzz
+
+package bitutil
+
+import "bytes"
+
+// Fuzz implements a go-fuzz fuzzer method to test various compression method
+// invocations.
+func Fuzz(data []byte) int {
+	if len(data) == 0 {
+		return -1
+	}
+	if data[0]%2 == 0 {
+		return fuzzCompress(data[1:])
+	}
+	return fuzzDecompress(data[1:])
+}
+
+// fuzzCompress implements a go-fuzz fuzzer method to test the bit compression and
+// decompression algorithm.
+func fuzzCompress(data []byte) int {
+	proc, _ := DecompressBytes(CompressBytes(data), len(data))
+	if !bytes.Equal(data, proc) {
+		panic("content mismatch")
+	}
+	return 0
+}
+
+// fuzzDecompress implements a go-fuzz fuzzer method to test the bit decompression
+// and recompression algorithm.
+func fuzzDecompress(data []byte) int {
+	blob, err := DecompressBytes(data, 1024)
+	if err != nil {
+		return 0
+	}
+	if comp := CompressBytes(blob); !bytes.Equal(comp, data) {
+		panic("content mismatch")
+	}
+	return 0
+}
-- 
cgit v1.2.3


From 82defe5c5663ca0c28563f8a111d327c87726267 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Mon, 8 May 2017 10:40:48 +0300
Subject: common/compress: internalize encoders, add length wrappers

---
 common/bitutil/compress_fuzz.go | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

(limited to 'common/bitutil/compress_fuzz.go')

diff --git a/common/bitutil/compress_fuzz.go b/common/bitutil/compress_fuzz.go
index 2b7fe2977..1b87f50ed 100644
--- a/common/bitutil/compress_fuzz.go
+++ b/common/bitutil/compress_fuzz.go
@@ -20,36 +20,36 @@ package bitutil
 
 import "bytes"
 
-// Fuzz implements a go-fuzz fuzzer method to test various compression method
+// Fuzz implements a go-fuzz fuzzer method to test various encoding method
 // invocations.
 func Fuzz(data []byte) int {
 	if len(data) == 0 {
 		return -1
 	}
 	if data[0]%2 == 0 {
-		return fuzzCompress(data[1:])
+		return fuzzEncode(data[1:])
 	}
-	return fuzzDecompress(data[1:])
+	return fuzzDecode(data[1:])
 }
 
-// fuzzCompress implements a go-fuzz fuzzer method to test the bit compression and
-// decompression algorithm.
-func fuzzCompress(data []byte) int {
-	proc, _ := DecompressBytes(CompressBytes(data), len(data))
+// fuzzEncode implements a go-fuzz fuzzer method to test the bitset encoding and
+// decoding algorithm.
+func fuzzEncode(data []byte) int {
+	proc, _ := bitsetDecodeBytes(bitsetEncodeBytes(data), len(data))
 	if !bytes.Equal(data, proc) {
 		panic("content mismatch")
 	}
 	return 0
 }
 
-// fuzzDecompress implements a go-fuzz fuzzer method to test the bit decompression
-// and recompression algorithm.
-func fuzzDecompress(data []byte) int {
-	blob, err := DecompressBytes(data, 1024)
+// fuzzDecode implements a go-fuzz fuzzer method to test the bit decoding and
+// reencoding algorithm.
+func fuzzDecode(data []byte) int {
+	blob, err := bitsetDecodeBytes(data, 1024)
 	if err != nil {
 		return 0
 	}
-	if comp := CompressBytes(blob); !bytes.Equal(comp, data) {
+	if comp := bitsetEncodeBytes(blob); !bytes.Equal(comp, data) {
 		panic("content mismatch")
 	}
 	return 0
-- 
cgit v1.2.3