cctz: initial integration. (#4806)

* cctz: initial integration.

* Update fuzz_cctz.cc

Co-authored-by: Abhishek Arya <inferno@chromium.org>

projects/cctz/Dockerfile

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+# Copyright 2020 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.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder
+RUN apt-get update && apt-get install -y make autoconf libgtest-dev
+RUN git clone --depth 1 https://github.com/google/cctz
+WORKDIR $SRC/cctz
+
+COPY build.sh $SRC/
+COPY fuzz_* $SRC/
+

projects/cctz/build.sh

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+# Copyright 2020 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.
+#
+################################################################################
+mkdir build && cd build
+cmake -DBUILD_TESTING=OFF ../
+make
+
+# Compile fuzzers
+cp $SRC/fuzz* .
+$CXX $CXXFLAGS $LIB_FUZZING_ENGINE ./fuzz_cctz.cc ./libcctz.a  -I../include/ -o $OUT/fuzz_cctz

projects/cctz/fuzz_cctz.cc

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+/* Copyright 2020 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 <fuzzer/FuzzedDataProvider.h>
+
+#include <iostream>
+#include <string>
+
+#include "cctz/civil_time.h"
+#include "cctz/time_zone.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+	FuzzedDataProvider fuzzed_data(data, size);
+
+	cctz::time_zone lax;
+	std::string tz = fuzzed_data.ConsumeRandomLengthString();
+	if (load_time_zone(tz, &lax)) {
+		std::chrono::system_clock::time_point tp;
+		std::string date_format = fuzzed_data.ConsumeRandomLengthString();
+		std::string parse_format = fuzzed_data.ConsumeRandomLengthString();
+		cctz::parse(parse_format, date_format, lax, &tp);
+
+		const auto t1 = cctz::convert(cctz::civil_second(
+				fuzzed_data.ConsumeIntegral<uint32_t>(),
+				fuzzed_data.ConsumeIntegral<uint32_t>(),
+				fuzzed_data.ConsumeIntegral<uint32_t>(),
+				fuzzed_data.ConsumeIntegral<uint32_t>(),
+				fuzzed_data.ConsumeIntegral<uint32_t>(),
+				fuzzed_data.ConsumeIntegral<uint32_t>()), lax);
+		std::string format = fuzzed_data.ConsumeRandomLengthString();
+		cctz::format(format, t1, lax);
+	}
+
+	return 0;
+}

projects/cctz/project.yaml

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+homepage: "https://github.com/google/cctz"
+language: c++
+primary_contact: "david@adalogics.com"