Added fuzzers to be run with OSS-Fuzz.

fuzz_decode.cc

@@ -0,0 +1,36 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+#include <cassert>
+#include <fstream>
+#include <sstream>
+
+#include <stdint.h>
+
+#include "jpeg_data.h"
+#include "jpeg_data_decoder.h"
+#include "jpeg_data_reader.h"
+
+using knusperli::JPEGData;
+using knusperli::JPEG_READ_ALL;
+using knusperli::ReadJpeg;
+
+extern "C" 
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+	std::string input(reinterpret_cast<const char*>(data), size);
+	JPEGData jpg;
+	ReadJpeg(input, JPEG_READ_ALL, &jpg);
+
+	return 0;
+}