1 files changed, 403 insertions, 0 deletions
diff --git a/third_party/wasm2c/src/emscripten-helpers.cc b/third_party/wasm2c/src/emscripten-helpers.cc
new file mode 100644
index 0000000000..127a8c458d
--- /dev/null
+++ b/third_party/wasm2c/src/emscripten-helpers.cc
@@ -0,0 +1,403 @@
+/*
+ * 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.
+ */
+
+#ifndef WABT_EMSCRIPTEN_HELPERS_H_
+#define WABT_EMSCRIPTEN_HELPERS_H_
+
+#include <cstddef>
+
+#include <algorithm>
+#include <iterator>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "wabt/apply-names.h"
+#include "wabt/binary-reader-ir.h"
+#include "wabt/binary-reader.h"
+#include "wabt/binary-writer-spec.h"
+#include "wabt/binary-writer.h"
+#include "wabt/common.h"
+#include "wabt/error-formatter.h"
+#include "wabt/feature.h"
+#include "wabt/filenames.h"
+#include "wabt/generate-names.h"
+#include "wabt/ir.h"
+#include "wabt/stream.h"
+#include "wabt/validator.h"
+#include "wabt/wast-lexer.h"
+#include "wabt/wast-parser.h"
+#include "wabt/wat-writer.h"
+
+using WabtOutputBufferPtr = std::unique_ptr<wabt::OutputBuffer>;
+using WabtFilenameOutputBufferPair =
+    std::pair<std::string, WabtOutputBufferPtr>;
+
+struct WabtParseWatResult {
+  wabt::Result result;
+  std::unique_ptr<wabt::Module> module;
+};
+
+struct WabtReadBinaryResult {
+  wabt::Result result;
+  std::unique_ptr<wabt::Module> module;
+};
+
+struct WabtWriteModuleResult {
+  wabt::Result result;
+  WabtOutputBufferPtr buffer;
+  WabtOutputBufferPtr log_buffer;
+};
+
+struct WabtWriteScriptResult {
+  wabt::Result result;
+  WabtOutputBufferPtr json_buffer;
+  WabtOutputBufferPtr log_buffer;
+  std::vector<WabtFilenameOutputBufferPair> module_buffers;
+};
+
+struct WabtParseWastResult {
+  wabt::Result result;
+  std::unique_ptr<wabt::Script> script;
+};
+
+extern "C" {
+
+wabt::Features* wabt_new_features(void) {
+  return new wabt::Features();
+}
+
+void wabt_destroy_features(wabt::Features* f) {
+  delete f;
+}
+
+#define WABT_FEATURE(variable, flag, default_, help)                   \
+  bool wabt_##variable##_enabled(wabt::Features* f) {                  \
+    return f->variable##_enabled();                                    \
+  }                                                                    \
+  void wabt_set_##variable##_enabled(wabt::Features* f, int enabled) { \
+    f->set_##variable##_enabled(enabled);                              \
+  }
+#include "wabt/feature.def"
+#undef WABT_FEATURE
+
+wabt::WastLexer* wabt_new_wast_buffer_lexer(const char* filename,
+                                            const void* data,
+                                            size_t size,
+                                            wabt::Errors* errors) {
+  std::unique_ptr<wabt::WastLexer> lexer =
+      wabt::WastLexer::CreateBufferLexer(filename, data, size, errors);
+  return lexer.release();
+}
+
+WabtParseWatResult* wabt_parse_wat(wabt::WastLexer* lexer,
+                                   wabt::Features* features,
+                                   wabt::Errors* errors) {
+  wabt::WastParseOptions options(*features);
+  WabtParseWatResult* result = new WabtParseWatResult();
+  std::unique_ptr<wabt::Module> module;
+  result->result = wabt::ParseWatModule(lexer, &module, errors, &options);
+  result->module = std::move(module);
+  return result;
+}
+
+WabtParseWastResult* wabt_parse_wast(wabt::WastLexer* lexer,
+                                     wabt::Features* features,
+                                     wabt::Errors* errors) {
+  wabt::WastParseOptions options(*features);
+  WabtParseWastResult* result = new WabtParseWastResult();
+  std::unique_ptr<wabt::Script> script;
+  result->result = wabt::ParseWastScript(lexer, &script, errors, &options);
+  result->script = std::move(script);
+  return result;
+}
+
+WabtReadBinaryResult* wabt_read_binary(const void* data,
+                                       size_t size,
+                                       int read_debug_names,
+                                       wabt::Features* features,
+                                       wabt::Errors* errors) {
+  wabt::ReadBinaryOptions options;
+  options.features = *features;
+  options.read_debug_names = read_debug_names;
+
+  WabtReadBinaryResult* result = new WabtReadBinaryResult();
+  wabt::Module* module = new wabt::Module();
+  // TODO(binji): Pass through from wabt_read_binary parameter.
+  const char* filename = "<binary>";
+  result->result =
+      wabt::ReadBinaryIr(filename, data, size, options, errors, module);
+  result->module.reset(module);
+  return result;
+}
+
+wabt::Result::Enum wabt_validate_module(wabt::Module* module,
+                                        wabt::Features* features,
+                                        wabt::Errors* errors) {
+  wabt::ValidateOptions options;
+  options.features = *features;
+  return ValidateModule(module, errors, options);
+}
+
+wabt::Result::Enum wabt_validate_script(wabt::Script* script,
+                                        wabt::Features* features,
+                                        wabt::Errors* errors) {
+  wabt::ValidateOptions options;
+  options.features = *features;
+  return ValidateScript(script, errors, options);
+}
+
+WabtWriteScriptResult* wabt_write_binary_spec_script(
+    wabt::Script* script,
+    const char* source_filename,
+    const char* out_filename,
+    int log,
+    int canonicalize_lebs,
+    int relocatable,
+    int write_debug_names) {
+  wabt::MemoryStream log_stream;
+  wabt::MemoryStream* log_stream_p = log ? &log_stream : nullptr;
+
+  wabt::WriteBinaryOptions options;
+  options.canonicalize_lebs = canonicalize_lebs;
+  options.relocatable = relocatable;
+  options.write_debug_names = write_debug_names;
+
+  std::vector<wabt::FilenameMemoryStreamPair> module_streams;
+  wabt::MemoryStream json_stream(log_stream_p);
+
+  std::string module_filename_noext(
+      wabt::StripExtension(out_filename ? out_filename : source_filename));
+
+  WabtWriteScriptResult* result = new WabtWriteScriptResult();
+  result->result = WriteBinarySpecScript(&json_stream, script, source_filename,
+                                         module_filename_noext, options,
+                                         &module_streams, log_stream_p);
+
+  if (result->result == wabt::Result::Ok) {
+    result->json_buffer = json_stream.ReleaseOutputBuffer();
+    result->log_buffer = log ? log_stream.ReleaseOutputBuffer() : nullptr;
+    std::transform(module_streams.begin(), module_streams.end(),
+                   std::back_inserter(result->module_buffers),
+                   [](wabt::FilenameMemoryStreamPair& pair) {
+                     return WabtFilenameOutputBufferPair(
+                         pair.filename, pair.stream->ReleaseOutputBuffer());
+                   });
+  }
+  return result;
+}
+
+wabt::Result::Enum wabt_apply_names_module(wabt::Module* module) {
+  return ApplyNames(module);
+}
+
+wabt::Result::Enum wabt_generate_names_module(wabt::Module* module) {
+  return GenerateNames(module);
+}
+
+WabtWriteModuleResult* wabt_write_binary_module(wabt::Module* module,
+                                                int log,
+                                                int canonicalize_lebs,
+                                                int relocatable,
+                                                int write_debug_names) {
+  wabt::MemoryStream log_stream;
+  wabt::WriteBinaryOptions options;
+  options.canonicalize_lebs = canonicalize_lebs;
+  options.relocatable = relocatable;
+  options.write_debug_names = write_debug_names;
+
+  wabt::MemoryStream stream(log ? &log_stream : nullptr);
+  WabtWriteModuleResult* result = new WabtWriteModuleResult();
+  result->result = WriteBinaryModule(&stream, module, options);
+  if (result->result == wabt::Result::Ok) {
+    result->buffer = stream.ReleaseOutputBuffer();
+    result->log_buffer = log ? log_stream.ReleaseOutputBuffer() : nullptr;
+  }
+  return result;
+}
+
+WabtWriteModuleResult* wabt_write_text_module(wabt::Module* module,
+                                              int fold_exprs,
+                                              int inline_export) {
+  wabt::WriteWatOptions options;
+  options.fold_exprs = fold_exprs;
+  options.inline_export = inline_export;
+
+  wabt::MemoryStream stream;
+  WabtWriteModuleResult* result = new WabtWriteModuleResult();
+  result->result = WriteWat(&stream, module, options);
+  if (result->result == wabt::Result::Ok) {
+    result->buffer = stream.ReleaseOutputBuffer();
+  }
+  return result;
+}
+
+void wabt_destroy_module(wabt::Module* module) {
+  delete module;
+}
+
+void wabt_destroy_wast_lexer(wabt::WastLexer* lexer) {
+  delete lexer;
+}
+
+// Errors
+wabt::Errors* wabt_new_errors(void) {
+  return new wabt::Errors();
+}
+
+wabt::OutputBuffer* wabt_format_text_errors(wabt::Errors* errors,
+                                            wabt::WastLexer* lexer) {
+  auto line_finder = lexer->MakeLineFinder();
+  std::string string_result = FormatErrorsToString(
+      *errors, wabt::Location::Type::Text, line_finder.get());
+
+  wabt::OutputBuffer* result = new wabt::OutputBuffer();
+  std::copy(string_result.begin(), string_result.end(),
+            std::back_inserter(result->data));
+  return result;
+}
+
+wabt::OutputBuffer* wabt_format_binary_errors(wabt::Errors* errors) {
+  std::string string_result =
+      FormatErrorsToString(*errors, wabt::Location::Type::Binary);
+
+  wabt::OutputBuffer* result = new wabt::OutputBuffer();
+  std::copy(string_result.begin(), string_result.end(),
+            std::back_inserter(result->data));
+  return result;
+}
+
+void wabt_destroy_errors(wabt::Errors* errors) {
+  delete errors;
+}
+
+// WabtParseWatResult
+wabt::Result::Enum wabt_parse_wat_result_get_result(
+    WabtParseWatResult* result) {
+  return result->result;
+}
+
+wabt::Module* wabt_parse_wat_result_release_module(WabtParseWatResult* result) {
+  return result->module.release();
+}
+
+void wabt_destroy_parse_wat_result(WabtParseWatResult* result) {
+  delete result;
+}
+
+// WabtParseWastResult
+wabt::Result::Enum wabt_parse_wast_result_get_result(
+    WabtParseWastResult* result) {
+  return result->result;
+}
+
+wabt::Script* wabt_parse_wast_result_release_module(
+    WabtParseWastResult* result) {
+  return result->script.release();
+}
+
+void wabt_destroy_parse_wast_result(WabtParseWastResult* result) {
+  delete result;
+}
+
+// WabtReadBinaryResult
+wabt::Result::Enum wabt_read_binary_result_get_result(
+    WabtReadBinaryResult* result) {
+  return result->result;
+}
+
+wabt::Module* wabt_read_binary_result_release_module(
+    WabtReadBinaryResult* result) {
+  return result->module.release();
+}
+
+void wabt_destroy_read_binary_result(WabtReadBinaryResult* result) {
+  delete result;
+}
+
+// WabtWriteModuleResult
+wabt::Result::Enum wabt_write_module_result_get_result(
+    WabtWriteModuleResult* result) {
+  return result->result;
+}
+
+wabt::OutputBuffer* wabt_write_module_result_release_output_buffer(
+    WabtWriteModuleResult* result) {
+  return result->buffer.release();
+}
+
+wabt::OutputBuffer* wabt_write_module_result_release_log_output_buffer(
+    WabtWriteModuleResult* result) {
+  return result->log_buffer.release();
+}
+
+void wabt_destroy_write_module_result(WabtWriteModuleResult* result) {
+  delete result;
+}
+
+// WabtWriteScriptResult
+wabt::Result::Enum wabt_write_script_result_get_result(
+    WabtWriteScriptResult* result) {
+  return result->result;
+}
+
+wabt::OutputBuffer* wabt_write_script_result_release_json_output_buffer(
+    WabtWriteScriptResult* result) {
+  return result->json_buffer.release();
+}
+
+wabt::OutputBuffer* wabt_write_script_result_release_log_output_buffer(
+    WabtWriteScriptResult* result) {
+  return result->log_buffer.release();
+}
+
+size_t wabt_write_script_result_get_module_count(
+    WabtWriteScriptResult* result) {
+  return result->module_buffers.size();
+}
+
+const char* wabt_write_script_result_get_module_filename(
+    WabtWriteScriptResult* result,
+    size_t index) {
+  return result->module_buffers[index].first.c_str();
+}
+
+wabt::OutputBuffer* wabt_write_script_result_release_module_output_buffer(
+    WabtWriteScriptResult* result,
+    size_t index) {
+  return result->module_buffers[index].second.release();
+}
+
+void wabt_destroy_write_script_result(WabtWriteScriptResult* result) {
+  delete result;
+}
+
+// wabt::OutputBuffer*
+const void* wabt_output_buffer_get_data(wabt::OutputBuffer* output_buffer) {
+  return output_buffer->data.data();
+}
+
+size_t wabt_output_buffer_get_size(wabt::OutputBuffer* output_buffer) {
+  return output_buffer->data.size();
+}
+
+void wabt_destroy_output_buffer(wabt::OutputBuffer* output_buffer) {
+  delete output_buffer;
+}
+
+}  // extern "C"
+
+#endif /* WABT_EMSCRIPTEN_HELPERS_H_ */