1 files changed, 86 insertions, 0 deletions
diff --git a/src/wasm/wasm-io.cpp b/src/wasm/wasm-io.cpp
new file mode 100644
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+++ b/src/wasm/wasm-io.cpp
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+/*
+ * Copyright 2017 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.
+ */
+
+//
+// Abstracts reading and writing, supporting both text and binary
+// depending on the suffix.
+//
+// When the suffix is unclear, writing defaults to text (this
+// allows odd suffixes, which we use in the test suite), while
+// reading will check the magic number and default to text if not
+// binary.
+//
+
+#include "wasm-io.h"
+#include "wasm-s-parser.h"
+#include "wasm-binary.h"
+#include "support/file.h"
+
+namespace wasm {
+
+void ModuleReader::readText(std::string filename, Module& wasm) {
+  if (debug) std::cerr << "reading text from " << filename << "\n";
+  auto input(read_file<std::string>(filename, Flags::Text, debug ? Flags::Debug : Flags::Release));
+  SExpressionParser parser(const_cast<char*>(input.c_str()));
+  Element& root = *parser.root;
+  SExpressionWasmBuilder builder(wasm, *root[0]);
+}
+
+void ModuleReader::readBinary(std::string filename, Module& wasm) {
+  if (debug) std::cerr << "reading binary from " << filename << "\n";
+  auto input(read_file<std::vector<char>>(filename, Flags::Binary, debug ? Flags::Debug : Flags::Release));
+  WasmBinaryBuilder parser(wasm, input, debug);
+  parser.read();
+}
+
+void ModuleReader::read(std::string filename, Module& wasm) {
+  // see if this is a binary
+  auto contents = read_file<std::vector<char>>(filename, Flags::Binary, debug ? Flags::Debug : Flags::Release);
+  if (contents.size() >= 4 && contents[0] == '\0' && contents[1] == 'a' && contents[2] == 's' && contents[3] == 'm') {
+    readBinary(filename, wasm);
+  } else {
+    // default to text
+    readText(filename, wasm);
+  }
+}
+
+void ModuleWriter::writeText(Module& wasm, std::string filename) {
+  if (debug) std::cerr << "writing text to " << filename << "\n";
+  Output output(filename, Flags::Text, debug ? Flags::Debug : Flags::Release);
+  WasmPrinter::printModule(&wasm, output.getStream());
+}
+
+void ModuleWriter::writeBinary(Module& wasm, std::string filename) {
+  if (debug) std::cerr << "writing binary to " << filename << "\n";
+  BufferWithRandomAccess buffer(debug);
+  WasmBinaryWriter writer(&wasm, buffer, debug);
+  writer.setDebugInfo(debugInfo);
+  if (symbolMap.size() > 0) writer.setSymbolMap(symbolMap);
+  writer.write();
+  Output output(filename, Flags::Binary, debug ? Flags::Debug : Flags::Release);
+  buffer.writeTo(output);
+}
+
+void ModuleWriter::write(Module& wasm, std::string filename) {
+  if (binary && filename.size() > 0) {
+    writeBinary(wasm, filename);
+  } else {
+    writeText(wasm, filename);
+  }
+}
+
+}
+