Initial WASM C API implementation. (#1250)

All tests except `threads` pass.

1 files changed, 74 insertions, 0 deletions

diff --git a/src/interp/binary-reader-metadata.cc b/src/interp/binary-reader-metadata.cc
new file mode 100644
index 00000000..8cbed78e
--- /dev/null
+++ b/src/interp/binary-reader-metadata.cc
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2020 WebAssembly Community Group participants
+ *
+ * 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 "src/interp/binary-reader-metadata.h"
+
+#include "src/binary-reader-nop.h"
+#include "src/binary-reader.h"
+#include "src/interp/interp.h"
+#include "src/string-view.h"
+
+namespace wabt {
+
+using namespace interp;
+
+namespace {
+
+class BinaryReaderMetadata : public BinaryReaderNop {
+ public:
+  BinaryReaderMetadata(ModuleMetadata* metadata,
+                       Errors* errors,
+                       const Features& features)
+      : metadata_(metadata) {}
+  wabt::Result OnImport(Index index,
+                        ExternalKind kind,
+                        string_view module_name,
+                        string_view field_name) override {
+    metadata_->imports.emplace_back(kind, module_name, field_name);
+    return wabt::Result::Ok;
+  }
+
+  wabt::Result OnExport(Index index,
+                        ExternalKind kind,
+                        Index item_index,
+                        string_view name) override {
+    metadata_->exports.emplace_back(name, kind, item_index);
+    return wabt::Result::Ok;
+  }
+
+ private:
+  ModuleMetadata* metadata_;
+};
+
+}  // end anonymous namespace
+
+wabt::Result ReadBinaryMetadata(const void* data,
+                                size_t size,
+                                const ReadBinaryOptions& options,
+                                Errors* errors,
+                                ModuleMetadata** out_metadata) {
+  ModuleMetadata* metadata = new ModuleMetadata();
+  BinaryReaderMetadata reader(metadata, errors, options.features);
+  wabt::Result result = ReadBinary(data, size, &reader, options);
+  if (!Succeeded(result)) {
+    delete metadata;
+    return result;
+  }
+  *out_metadata = metadata;
+  return result;
+}
+
+}  // namespace wabt