1 files changed, 149 insertions, 0 deletions
diff --git a/third_party/wasm2c/src/tools/wasm2wat.cc b/third_party/wasm2c/src/tools/wasm2wat.cc
new file mode 100644
index 0000000000..58e89849fe
--- /dev/null
+++ b/third_party/wasm2c/src/tools/wasm2wat.cc
@@ -0,0 +1,149 @@
+/*
+ * 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 <cinttypes>
+#include <cstdio>
+#include <cstdlib>
+
+#include "src/apply-names.h"
+#include "src/binary-reader.h"
+#include "src/binary-reader-ir.h"
+#include "src/error-formatter.h"
+#include "src/feature.h"
+#include "src/generate-names.h"
+#include "src/ir.h"
+#include "src/option-parser.h"
+#include "src/stream.h"
+#include "src/validator.h"
+#include "src/wast-lexer.h"
+#include "src/wat-writer.h"
+
+using namespace wabt;
+
+static int s_verbose;
+static std::string s_infile;
+static std::string s_outfile;
+static Features s_features;
+static WriteWatOptions s_write_wat_options;
+static bool s_generate_names = false;
+static bool s_read_debug_names = true;
+static bool s_fail_on_custom_section_error = true;
+static std::unique_ptr<FileStream> s_log_stream;
+static bool s_validate = true;
+
+static const char s_description[] =
+R"(  Read a file in the WebAssembly binary format, and convert it to
+  the WebAssembly text format.
+
+examples:
+  # parse binary file test.wasm and write text file test.wast
+  $ wasm2wat test.wasm -o test.wat
+
+  # parse test.wasm, write test.wat, but ignore the debug names, if any
+  $ wasm2wat test.wasm --no-debug-names -o test.wat
+)";
+
+static void ParseOptions(int argc, char** argv) {
+  OptionParser parser("wasm2wat", s_description);
+
+  parser.AddOption('v', "verbose", "Use multiple times for more info", []() {
+    s_verbose++;
+    s_log_stream = FileStream::CreateStderr();
+  });
+  parser.AddOption(
+      'o', "output", "FILENAME",
+      "Output file for the generated wast file, by default use stdout",
+      [](const char* argument) {
+        s_outfile = argument;
+        ConvertBackslashToSlash(&s_outfile);
+      });
+  parser.AddOption('f', "fold-exprs", "Write folded expressions where possible",
+                   []() { s_write_wat_options.fold_exprs = true; });
+  s_features.AddOptions(&parser);
+  parser.AddOption("inline-exports", "Write all exports inline",
+                   []() { s_write_wat_options.inline_export = true; });
+  parser.AddOption("inline-imports", "Write all imports inline",
+                   []() { s_write_wat_options.inline_import = true; });
+  parser.AddOption("no-debug-names", "Ignore debug names in the binary file",
+                   []() { s_read_debug_names = false; });
+  parser.AddOption("ignore-custom-section-errors",
+                   "Ignore errors in custom sections",
+                   []() { s_fail_on_custom_section_error = false; });
+  parser.AddOption(
+      "generate-names",
+      "Give auto-generated names to non-named functions, types, etc.",
+      []() { s_generate_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;
+                       ConvertBackslashToSlash(&s_infile);
+                     });
+  parser.Parse(argc, argv);
+}
+
+int ProgramMain(int argc, char** argv) {
+  Result result;
+
+  InitStdio();
+  ParseOptions(argc, argv);
+
+  std::vector<uint8_t> file_data;
+  result = ReadFile(s_infile.c_str(), &file_data);
+  if (Succeeded(result)) {
+    Errors errors;
+    Module module;
+    const bool kStopOnFirstError = true;
+    ReadBinaryOptions options(s_features, s_log_stream.get(),
+                              s_read_debug_names, kStopOnFirstError,
+                              s_fail_on_custom_section_error);
+    result = ReadBinaryIr(s_infile.c_str(), file_data.data(), file_data.size(),
+                          options, &errors, &module);
+    if (Succeeded(result)) {
+      if (Succeeded(result) && s_validate) {
+        ValidateOptions options(s_features);
+        result = ValidateModule(&module, &errors, options);
+      }
+
+      if (s_generate_names) {
+        result = GenerateNames(&module);
+      }
+
+      if (Succeeded(result)) {
+        /* TODO(binji): This shouldn't fail; if a name can't be applied
+         * (because the index is invalid, say) it should just be skipped. */
+        Result dummy_result = ApplyNames(&module);
+        WABT_USE(dummy_result);
+      }
+
+      if (Succeeded(result)) {
+        FileStream stream(!s_outfile.empty() ? FileStream(s_outfile)
+                                             : FileStream(stdout));
+        result = WriteWat(&stream, &module, s_write_wat_options);
+      }
+    }
+    FormatErrorsToFile(errors, Location::Type::Binary);
+  }
+  return result != Result::Ok;
+}
+
+int main(int argc, char** argv) {
+  WABT_TRY
+  return ProgramMain(argc, argv);
+  WABT_CATCH_BAD_ALLOC_AND_EXIT
+}