1 files changed, 170 insertions, 0 deletions
diff --git a/third_party/wasm2c/src/tools/wat2wasm.cc b/third_party/wasm2c/src/tools/wat2wasm.cc
new file mode 100644
index 0000000000..f77dad2778
--- /dev/null
+++ b/third_party/wasm2c/src/tools/wat2wasm.cc
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2016 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 <cassert>
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <cstdio>
+#include <string>
+
+#include "config.h"
+
+#include "src/binary-writer.h"
+#include "src/common.h"
+#include "src/error-formatter.h"
+#include "src/feature.h"
+#include "src/filenames.h"
+#include "src/ir.h"
+#include "src/option-parser.h"
+#include "src/resolve-names.h"
+#include "src/stream.h"
+#include "src/validator.h"
+#include "src/wast-parser.h"
+
+using namespace wabt;
+
+static const char* s_infile;
+static std::string s_outfile;
+static bool s_dump_module;
+static int s_verbose;
+static WriteBinaryOptions s_write_binary_options;
+static bool s_validate = true;
+static bool s_debug_parsing;
+static Features s_features;
+
+static std::unique_ptr<FileStream> s_log_stream;
+
+static const char s_description[] =
+R"(  read a file in the wasm text format, check it for errors, and
+  convert it to the wasm binary format.
+
+examples:
+  # parse and typecheck test.wat
+  $ wat2wasm test.wat
+
+  # parse test.wat and write to binary file test.wasm
+  $ wat2wasm test.wat -o test.wasm
+
+  # parse spec-test.wast, and write verbose output to stdout (including
+  # the meaning of every byte)
+  $ wat2wasm spec-test.wast -v
+)";
+
+static void ParseOptions(int argc, char* argv[]) {
+  OptionParser parser("wat2wasm", s_description);
+
+  parser.AddOption('v', "verbose", "Use multiple times for more info", []() {
+    s_verbose++;
+    s_log_stream = FileStream::CreateStderr();
+  });
+  parser.AddOption("debug-parser", "Turn on debugging the parser of wat files",
+                   []() { s_debug_parsing = true; });
+  parser.AddOption('d', "dump-module",
+                   "Print a hexdump of the module to stdout",
+                   []() { s_dump_module = true; });
+  s_features.AddOptions(&parser);
+  parser.AddOption('o', "output", "FILE", "output wasm binary file",
+                   [](const char* argument) { s_outfile = argument; });
+  parser.AddOption(
+      'r', "relocatable",
+      "Create a relocatable wasm binary (suitable for linking with e.g. lld)",
+      []() { s_write_binary_options.relocatable = true; });
+  parser.AddOption(
+      "no-canonicalize-leb128s",
+      "Write all LEB128 sizes as 5-bytes instead of their minimal size",
+      []() { s_write_binary_options.canonicalize_lebs = false; });
+  parser.AddOption("debug-names",
+                   "Write debug names to the generated binary file",
+                   []() { s_write_binary_options.write_debug_names = true; });
+  parser.AddOption("no-check", "Don't check for invalid modules",
+                   []() { s_validate = false; });
+  parser.AddArgument("filename", OptionParser::ArgumentCount::One,
+                     [](const char* argument) { s_infile = argument; });
+
+  parser.Parse(argc, argv);
+}
+
+static void WriteBufferToFile(string_view filename,
+                              const OutputBuffer& buffer) {
+  if (s_dump_module) {
+    std::unique_ptr<FileStream> stream = FileStream::CreateStdout();
+    if (s_verbose) {
+      stream->Writef(";; dump\n");
+    }
+    if (!buffer.data.empty()) {
+      stream->WriteMemoryDump(buffer.data.data(), buffer.data.size());
+    }
+  }
+
+  buffer.WriteToFile(filename);
+}
+
+static std::string DefaultOuputName(string_view input_name) {
+  // Strip existing extension and add .wasm
+  std::string result(StripExtension(GetBasename(input_name)));
+  result += kWasmExtension;
+
+  return result;
+}
+
+int ProgramMain(int argc, char** argv) {
+  InitStdio();
+
+  ParseOptions(argc, argv);
+
+  std::vector<uint8_t> file_data;
+  Result result = ReadFile(s_infile, &file_data);
+  std::unique_ptr<WastLexer> lexer = WastLexer::CreateBufferLexer(
+      s_infile, file_data.data(), file_data.size());
+  if (Failed(result)) {
+    WABT_FATAL("unable to read file: %s\n", s_infile);
+  }
+
+  Errors errors;
+  std::unique_ptr<Module> module;
+  WastParseOptions parse_wast_options(s_features);
+  result = ParseWatModule(lexer.get(), &module, &errors, &parse_wast_options);
+
+  if (Succeeded(result) && s_validate) {
+    ValidateOptions options(s_features);
+    result = ValidateModule(module.get(), &errors, options);
+  }
+
+  if (Succeeded(result)) {
+    MemoryStream stream(s_log_stream.get());
+    s_write_binary_options.features = s_features;
+    result = WriteBinaryModule(&stream, module.get(), s_write_binary_options);
+
+    if (Succeeded(result)) {
+      if (s_outfile.empty()) {
+        s_outfile = DefaultOuputName(s_infile);
+      }
+      WriteBufferToFile(s_outfile.c_str(), stream.output_buffer());
+    }
+  }
+
+  auto line_finder = lexer->MakeLineFinder();
+  FormatErrorsToFile(errors, Location::Type::Text, line_finder.get());
+
+  return result != Result::Ok;
+}
+
+int main(int argc, char** argv) {
+  WABT_TRY
+  return ProgramMain(argc, argv);
+  WABT_CATCH_BAD_ALLOC_AND_EXIT
+}