Add new target for spirv-lint (#4446)

This PR adds a new executable spirv-lint with a simple "Hello, world!"
program, along with its associated library and a dummy unit test.

For now, only adds to CMake and Bazel; other build systems will be added
in a future PR.

Issue: #3196

1 files changed, 48 insertions, 0 deletions

diff --git a/include/spirv-tools/linter.hpp b/include/spirv-tools/linter.hpp
new file mode 100644
index 000000000..57d1b4e98
--- /dev/null
+++ b/include/spirv-tools/linter.hpp
@@ -0,0 +1,48 @@
+// Copyright (c) 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.
+
+#ifndef INCLUDE_SPIRV_TOOLS_LINTER_HPP_
+#define INCLUDE_SPIRV_TOOLS_LINTER_HPP_
+
+#include "libspirv.hpp"
+
+namespace spvtools {
+
+// C++ interface for SPIR-V linting functionalities. It wraps the context
+// (including target environment and the corresponding SPIR-V grammar) and
+// provides a method for linting.
+//
+// Instances of this class provides basic thread-safety guarantee.
+class Linter {
+ public:
+  explicit Linter(spv_target_env env);
+
+  ~Linter();
+
+  // Sets the message consumer to the given |consumer|. The |consumer| will be
+  // invoked once for each message communicated from the library.
+  void SetMessageConsumer(MessageConsumer consumer);
+
+  // Returns a reference to the registered message consumer.
+  const MessageConsumer& consumer() const;
+
+  bool Run(const uint32_t* binary, size_t binary_size);
+
+ private:
+  struct Impl;
+  std::unique_ptr<Impl> impl_;
+};
+}  // namespace spvtools
+
+#endif  // INCLUDE_SPIRV_TOOLS_LINTER_HPP_