diff --git a/src/flatc.cpp b/src/flatc.cpp
new file mode 100644
index 0000000..e1236bd
--- /dev/null
+++ b/src/flatc.cpp
@@ -0,0 +1,489 @@
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * 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 "flatbuffers/flatc.h"
+
+#include <list>
+
+namespace flatbuffers {
+
+const char *FLATC_VERSION() { return FLATBUFFERS_VERSION(); }
+
+void FlatCompiler::ParseFile(
+    flatbuffers::Parser &parser, const std::string &filename,
+    const std::string &contents,
+    std::vector<const char *> &include_directories) const {
+  auto local_include_directory = flatbuffers::StripFileName(filename);
+  include_directories.push_back(local_include_directory.c_str());
+  include_directories.push_back(nullptr);
+  if (!parser.Parse(contents.c_str(), &include_directories[0],
+                    filename.c_str())) {
+    Error(parser.error_, false, false);
+  }
+  if (!parser.error_.empty()) { Warn(parser.error_, false); }
+  include_directories.pop_back();
+  include_directories.pop_back();
+}
+
+void FlatCompiler::LoadBinarySchema(flatbuffers::Parser &parser,
+                                    const std::string &filename,
+                                    const std::string &contents) {
+  if (!parser.Deserialize(reinterpret_cast<const uint8_t *>(contents.c_str()),
+      contents.size())) {
+    Error("failed to load binary schema: " + filename, false, false);
+  }
+}
+
+void FlatCompiler::Warn(const std::string &warn, bool show_exe_name) const {
+  params_.warn_fn(this, warn, show_exe_name);
+}
+
+void FlatCompiler::Error(const std::string &err, bool usage,
+                         bool show_exe_name) const {
+  params_.error_fn(this, err, usage, show_exe_name);
+}
+
+std::string FlatCompiler::GetUsageString(const char *program_name) const {
+  std::stringstream ss;
+  ss << "Usage: " << program_name << " [OPTION]... FILE... [-- FILE...]\n";
+  for (size_t i = 0; i < params_.num_generators; ++i) {
+    const Generator &g = params_.generators[i];
+
+    std::stringstream full_name;
+    full_name << std::setw(12) << std::left << g.generator_opt_long;
+    const char *name = g.generator_opt_short ? g.generator_opt_short : "  ";
+    const char *help = g.generator_help;
+
+    ss << "  " << full_name.str() << " " << name << "    " << help << ".\n";
+  }
+  // clang-format off
+  ss <<
+    "  -o PATH            Prefix PATH to all generated files.\n"
+    "  -I PATH            Search for includes in the specified path.\n"
+    "  -M                 Print make rules for generated files.\n"
+    "  --version          Print the version number of flatc and exit.\n"
+    "  --strict-json      Strict JSON: field names must be / will be quoted,\n"
+    "                     no trailing commas in tables/vectors.\n"
+    "  --allow-non-utf8   Pass non-UTF-8 input through parser and emit nonstandard\n"
+    "                     \\x escapes in JSON. (Default is to raise parse error on\n"
+    "                     non-UTF-8 input.)\n"
+    "  --natural-utf8     Output strings with UTF-8 as human-readable strings.\n"
+    "                     By default, UTF-8 characters are printed as \\uXXXX escapes.\n"
+    "  --defaults-json    Output fields whose value is the default when\n"
+    "                     writing JSON\n"
+    "  --unknown-json     Allow fields in JSON that are not defined in the\n"
+    "                     schema. These fields will be discared when generating\n"
+    "                     binaries.\n"
+    "  --no-prefix        Don\'t prefix enum values with the enum type in C++.\n"
+    "  --scoped-enums     Use C++11 style scoped and strongly typed enums.\n"
+    "                     also implies --no-prefix.\n"
+    "  --gen-includes     (deprecated), this is the default behavior.\n"
+    "                     If the original behavior is required (no include\n"
+    "                     statements) use --no-includes.\n"
+    "  --no-includes      Don\'t generate include statements for included\n"
+    "                     schemas the generated file depends on (C++).\n"
+    "  --gen-mutable      Generate accessors that can mutate buffers in-place.\n"
+    "  --gen-onefile      Generate single output file for C# and Go.\n"
+    "  --gen-name-strings Generate type name functions for C++.\n"
+    "  --gen-object-api   Generate an additional object-based API.\n"
+    "  --gen-compare      Generate operator== for object-based API types.\n"
+    "  --gen-nullable     Add Clang _Nullable for C++ pointer. or @Nullable for Java\n"
+    "  --gen-generated    Add @Generated annotation for Java\n"
+    "  --gen-all          Generate not just code for the current schema files,\n"
+    "                     but for all files it includes as well.\n"
+    "                     If the language uses a single file for output (by default\n"
+    "                     the case for C++ and JS), all code will end up in this one\n"
+    "                     file.\n"
+    "  --cpp-include      Adds an #include in generated file.\n"
+    "  --cpp-ptr-type T   Set object API pointer type (default std::unique_ptr).\n"
+    "  --cpp-str-type T   Set object API string type (default std::string).\n"
+    "                     T::c_str(), T::length() and T::empty() must be supported.\n"
+    "                     The custom type also needs to be constructible from std::string\n"
+    "                     (see the --cpp-str-flex-ctor option to change this behavior).\n"
+    "  --cpp-str-flex-ctor Don't construct custom string types by passing std::string\n"
+    "                     from Flatbuffers, but (char* + length).\n"
+    "  --object-prefix    Customise class prefix for C++ object-based API.\n"
+    "  --object-suffix    Customise class suffix for C++ object-based API.\n"
+    "                     Default value is \"T\".\n"
+    "  --no-js-exports    Removes Node.js style export lines in JS.\n"
+    "  --goog-js-export   Uses goog.exports* for closure compiler exporting in JS.\n"
+    "  --es6-js-export    Uses ECMAScript 6 export style lines in JS.\n"
+    "  --go-namespace     Generate the overrided namespace in Golang.\n"
+    "  --go-import        Generate the overrided import for flatbuffers in Golang\n"
+    "                     (default is \"github.com/google/flatbuffers/go\").\n"
+    "  --raw-binary       Allow binaries without file_indentifier to be read.\n"
+    "                     This may crash flatc given a mismatched schema.\n"
+    "  --size-prefixed    Input binaries are size prefixed buffers.\n"
+    "  --proto            Input is a .proto, translate to .fbs.\n"
+    "  --oneof-union      Translate .proto oneofs to flatbuffer unions.\n"
+    "  --grpc             Generate GRPC interfaces for the specified languages.\n"
+    "  --schema           Serialize schemas instead of JSON (use with -b).\n"
+    "  --bfbs-comments    Add doc comments to the binary schema files.\n"
+    "  --bfbs-builtins    Add builtin attributes to the binary schema files.\n"
+    "  --conform FILE     Specify a schema the following schemas should be\n"
+    "                     an evolution of. Gives errors if not.\n"
+    "  --conform-includes Include path for the schema given with --conform PATH\n"
+    "  --include-prefix   Prefix this path to any generated include statements.\n"
+    "    PATH\n"
+    "  --keep-prefix      Keep original prefix of schema include statement.\n"
+    "  --no-fb-import     Don't include flatbuffers import statement for TypeScript.\n"
+    "  --no-ts-reexport   Don't re-export imported dependencies for TypeScript.\n"
+    "  --short-names      Use short function names for JS and TypeScript.\n"
+    "  --reflect-types    Add minimal type reflection to code generation.\n"
+    "  --reflect-names    Add minimal type/name reflection.\n"
+    "  --root-type T      Select or override the default root_type\n"
+    "  --force-defaults   Emit default values in binary output from JSON\n"
+    "  --force-empty      When serializing from object API representation,\n"
+    "                     force strings and vectors to empty rather than null.\n"
+    "FILEs may be schemas (must end in .fbs), binary schemas (must end in .bfbs),\n"
+    "or JSON files (conforming to preceding schema). FILEs after the -- must be\n"
+    "binary flatbuffer format files.\n"
+    "Output files are named using the base file name of the input,\n"
+    "and written to the current directory or the path given by -o.\n"
+    "example: " << program_name << " -c -b schema1.fbs schema2.fbs data.json\n";
+  // clang-format on
+  return ss.str();
+}
+
+int FlatCompiler::Compile(int argc, const char **argv) {
+  if (params_.generators == nullptr || params_.num_generators == 0) {
+    return 0;
+  }
+
+  flatbuffers::IDLOptions opts;
+  std::string output_path;
+
+  bool any_generator = false;
+  bool print_make_rules = false;
+  bool raw_binary = false;
+  bool schema_binary = false;
+  bool grpc_enabled = false;
+  std::vector<std::string> filenames;
+  std::list<std::string> include_directories_storage;
+  std::vector<const char *> include_directories;
+  std::vector<const char *> conform_include_directories;
+  std::vector<bool> generator_enabled(params_.num_generators, false);
+  size_t binary_files_from = std::numeric_limits<size_t>::max();
+  std::string conform_to_schema;
+
+  for (int argi = 0; argi < argc; argi++) {
+    std::string arg = argv[argi];
+    if (arg[0] == '-') {
+      if (filenames.size() && arg[1] != '-')
+        Error("invalid option location: " + arg, true);
+      if (arg == "-o") {
+        if (++argi >= argc) Error("missing path following: " + arg, true);
+        output_path = flatbuffers::ConCatPathFileName(
+            flatbuffers::PosixPath(argv[argi]), "");
+      } else if (arg == "-I") {
+        if (++argi >= argc) Error("missing path following" + arg, true);
+        include_directories_storage.push_back(
+            flatbuffers::PosixPath(argv[argi]));
+        include_directories.push_back(
+            include_directories_storage.back().c_str());
+      } else if (arg == "--conform") {
+        if (++argi >= argc) Error("missing path following" + arg, true);
+        conform_to_schema = flatbuffers::PosixPath(argv[argi]);
+      } else if (arg == "--conform-includes") {
+        if (++argi >= argc) Error("missing path following" + arg, true);
+        include_directories_storage.push_back(
+            flatbuffers::PosixPath(argv[argi]));
+        conform_include_directories.push_back(
+            include_directories_storage.back().c_str());
+      } else if (arg == "--include-prefix") {
+        if (++argi >= argc) Error("missing path following" + arg, true);
+        opts.include_prefix = flatbuffers::ConCatPathFileName(
+            flatbuffers::PosixPath(argv[argi]), "");
+      } else if (arg == "--keep-prefix") {
+        opts.keep_include_path = true;
+      } else if (arg == "--strict-json") {
+        opts.strict_json = true;
+      } else if (arg == "--allow-non-utf8") {
+        opts.allow_non_utf8 = true;
+      } else if (arg == "--natural-utf8") {
+        opts.natural_utf8 = true;
+      } else if (arg == "--no-js-exports") {
+        opts.skip_js_exports = true;
+      } else if (arg == "--goog-js-export") {
+        opts.use_goog_js_export_format = true;
+        opts.use_ES6_js_export_format = false;
+      } else if (arg == "--es6-js-export") {
+        opts.use_goog_js_export_format = false;
+        opts.use_ES6_js_export_format = true;
+      } else if (arg == "--go-namespace") {
+        if (++argi >= argc) Error("missing golang namespace" + arg, true);
+        opts.go_namespace = argv[argi];
+      } else if (arg == "--go-import") {
+        if (++argi >= argc) Error("missing golang import" + arg, true);
+        opts.go_import = argv[argi];
+      } else if (arg == "--defaults-json") {
+        opts.output_default_scalars_in_json = true;
+      } else if (arg == "--unknown-json") {
+        opts.skip_unexpected_fields_in_json = true;
+      } else if (arg == "--no-prefix") {
+        opts.prefixed_enums = false;
+      } else if (arg == "--scoped-enums") {
+        opts.prefixed_enums = false;
+        opts.scoped_enums = true;
+      } else if (arg == "--no-union-value-namespacing") {
+        opts.union_value_namespacing = false;
+      } else if (arg == "--gen-mutable") {
+        opts.mutable_buffer = true;
+      } else if (arg == "--gen-name-strings") {
+        opts.generate_name_strings = true;
+      } else if (arg == "--gen-object-api") {
+        opts.generate_object_based_api = true;
+      } else if (arg == "--gen-compare") {
+        opts.gen_compare = true;
+      } else if (arg == "--cpp-include") {
+        if (++argi >= argc) Error("missing include following" + arg, true);
+        opts.cpp_includes.push_back(argv[argi]);
+      } else if (arg == "--cpp-ptr-type") {
+        if (++argi >= argc) Error("missing type following" + arg, true);
+        opts.cpp_object_api_pointer_type = argv[argi];
+      } else if (arg == "--cpp-str-type") {
+        if (++argi >= argc) Error("missing type following" + arg, true);
+        opts.cpp_object_api_string_type = argv[argi];
+      } else if (arg == "--cpp-str-flex-ctor") {
+        opts.cpp_object_api_string_flexible_constructor = true;
+      } else if (arg == "--gen-nullable") {
+        opts.gen_nullable = true;
+      } else if (arg == "--gen-generated") {
+        opts.gen_generated = true;
+      } else if (arg == "--object-prefix") {
+        if (++argi >= argc) Error("missing prefix following" + arg, true);
+        opts.object_prefix = argv[argi];
+      } else if (arg == "--object-suffix") {
+        if (++argi >= argc) Error("missing suffix following" + arg, true);
+        opts.object_suffix = argv[argi];
+      } else if (arg == "--gen-all") {
+        opts.generate_all = true;
+        opts.include_dependence_headers = false;
+      } else if (arg == "--gen-includes") {
+        // Deprecated, remove this option some time in the future.
+        printf("warning: --gen-includes is deprecated (it is now default)\n");
+      } else if (arg == "--no-includes") {
+        opts.include_dependence_headers = false;
+      } else if (arg == "--gen-onefile") {
+        opts.one_file = true;
+      } else if (arg == "--raw-binary") {
+        raw_binary = true;
+      } else if (arg == "--size-prefixed") {
+        opts.size_prefixed = true;
+      } else if (arg == "--") {  // Separator between text and binary inputs.
+        binary_files_from = filenames.size();
+      } else if (arg == "--proto") {
+        opts.proto_mode = true;
+      } else if (arg == "--oneof-union") {
+        opts.proto_oneof_union = true;
+      } else if (arg == "--schema") {
+        schema_binary = true;
+      } else if (arg == "-M") {
+        print_make_rules = true;
+      } else if (arg == "--version") {
+        printf("flatc version %s\n", FLATC_VERSION());
+        exit(0);
+      } else if (arg == "--grpc") {
+        grpc_enabled = true;
+      } else if (arg == "--bfbs-comments") {
+        opts.binary_schema_comments = true;
+      } else if (arg == "--bfbs-builtins") {
+        opts.binary_schema_builtins = true;
+      } else if (arg == "--no-fb-import") {
+        opts.skip_flatbuffers_import = true;
+      } else if (arg == "--no-ts-reexport") {
+        opts.reexport_ts_modules = false;
+      } else if (arg == "--short-names") {
+        opts.js_ts_short_names = true;
+      } else if (arg == "--reflect-types") {
+        opts.mini_reflect = IDLOptions::kTypes;
+      } else if (arg == "--reflect-names") {
+        opts.mini_reflect = IDLOptions::kTypesAndNames;
+      } else if (arg == "--root-type") {
+        if (++argi >= argc) Error("missing type following" + arg, true);
+        opts.root_type = argv[argi];
+      } else if (arg == "--force-defaults") {
+        opts.force_defaults = true;
+      } else if (arg == "--force-empty") {
+        opts.set_empty_to_null = false;
+      } else {
+        for (size_t i = 0; i < params_.num_generators; ++i) {
+          if (arg == params_.generators[i].generator_opt_long ||
+              (params_.generators[i].generator_opt_short &&
+               arg == params_.generators[i].generator_opt_short)) {
+            generator_enabled[i] = true;
+            any_generator = true;
+            opts.lang_to_generate |= params_.generators[i].lang;
+            goto found;
+          }
+        }
+        Error("unknown commandline argument: " + arg, true);
+      found:;
+      }
+    } else {
+      filenames.push_back(flatbuffers::PosixPath(argv[argi]));
+    }
+  }
+
+  if (!filenames.size()) Error("missing input files", false, true);
+
+  if (opts.proto_mode) {
+    if (any_generator)
+      Error("cannot generate code directly from .proto files", true);
+  } else if (!any_generator && conform_to_schema.empty()) {
+    Error("no options: specify at least one generator.", true);
+  }
+
+  flatbuffers::Parser conform_parser;
+  if (!conform_to_schema.empty()) {
+    std::string contents;
+    if (!flatbuffers::LoadFile(conform_to_schema.c_str(), true, &contents))
+      Error("unable to load schema: " + conform_to_schema);
+
+    if (flatbuffers::GetExtension(conform_to_schema) ==
+        reflection::SchemaExtension()) {
+      LoadBinarySchema(conform_parser, conform_to_schema, contents);
+    } else {
+      ParseFile(conform_parser, conform_to_schema, contents,
+                conform_include_directories);
+    }
+  }
+
+  std::unique_ptr<flatbuffers::Parser> parser(new flatbuffers::Parser(opts));
+
+  for (auto file_it = filenames.begin(); file_it != filenames.end();
+       ++file_it) {
+    auto &filename = *file_it;
+    std::string contents;
+    if (!flatbuffers::LoadFile(filename.c_str(), true, &contents))
+      Error("unable to load file: " + filename);
+
+    bool is_binary =
+        static_cast<size_t>(file_it - filenames.begin()) >= binary_files_from;
+    auto ext = flatbuffers::GetExtension(filename);
+    auto is_schema = ext == "fbs" || ext == "proto";
+    auto is_binary_schema = ext == reflection::SchemaExtension();
+    if (is_binary) {
+      parser->builder_.Clear();
+      parser->builder_.PushFlatBuffer(
+          reinterpret_cast<const uint8_t *>(contents.c_str()),
+          contents.length());
+      if (!raw_binary) {
+        // Generally reading binaries that do not correspond to the schema
+        // will crash, and sadly there's no way around that when the binary
+        // does not contain a file identifier.
+        // We'd expect that typically any binary used as a file would have
+        // such an identifier, so by default we require them to match.
+        if (!parser->file_identifier_.length()) {
+          Error("current schema has no file_identifier: cannot test if \"" +
+                filename +
+                "\" matches the schema, use --raw-binary to read this file"
+                " anyway.");
+        } else if (!flatbuffers::BufferHasIdentifier(
+                       contents.c_str(), parser->file_identifier_.c_str(), opts.size_prefixed)) {
+          Error("binary \"" + filename +
+                "\" does not have expected file_identifier \"" +
+                parser->file_identifier_ +
+                "\", use --raw-binary to read this file anyway.");
+        }
+      }
+    } else {
+      // Check if file contains 0 bytes.
+      if (!is_binary_schema && contents.length() != strlen(contents.c_str())) {
+        Error("input file appears to be binary: " + filename, true);
+      }
+      if (is_schema) {
+        // If we're processing multiple schemas, make sure to start each
+        // one from scratch. If it depends on previous schemas it must do
+        // so explicitly using an include.
+        parser.reset(new flatbuffers::Parser(opts));
+      }
+      if (is_binary_schema) {
+        LoadBinarySchema(*parser.get(), filename, contents);
+      } else {
+        ParseFile(*parser.get(), filename, contents, include_directories);
+        if (!is_schema && !parser->builder_.GetSize()) {
+          // If a file doesn't end in .fbs, it must be json/binary. Ensure we
+          // didn't just parse a schema with a different extension.
+          Error("input file is neither json nor a .fbs (schema) file: " +
+                    filename,
+                true);
+        }
+      }
+      if ((is_schema || is_binary_schema) && !conform_to_schema.empty()) {
+        auto err = parser->ConformTo(conform_parser);
+        if (!err.empty()) Error("schemas don\'t conform: " + err);
+      }
+      if (schema_binary) {
+        parser->Serialize();
+        parser->file_extension_ = reflection::SchemaExtension();
+      }
+    }
+
+    std::string filebase =
+        flatbuffers::StripPath(flatbuffers::StripExtension(filename));
+
+    for (size_t i = 0; i < params_.num_generators; ++i) {
+      parser->opts.lang = params_.generators[i].lang;
+      if (generator_enabled[i]) {
+        if (!print_make_rules) {
+          flatbuffers::EnsureDirExists(output_path);
+          if ((!params_.generators[i].schema_only ||
+               (is_schema || is_binary_schema)) &&
+              !params_.generators[i].generate(*parser.get(), output_path,
+                                              filebase)) {
+            Error(std::string("Unable to generate ") +
+                  params_.generators[i].lang_name + " for " + filebase);
+          }
+        } else {
+          std::string make_rule = params_.generators[i].make_rule(
+              *parser.get(), output_path, filename);
+          if (!make_rule.empty())
+            printf("%s\n",
+                   flatbuffers::WordWrap(make_rule, 80, " ", " \\").c_str());
+        }
+        if (grpc_enabled) {
+          if (params_.generators[i].generateGRPC != nullptr) {
+            if (!params_.generators[i].generateGRPC(*parser.get(), output_path,
+                                                    filebase)) {
+              Error(std::string("Unable to generate GRPC interface for") +
+                    params_.generators[i].lang_name);
+            }
+          } else {
+            Warn(std::string("GRPC interface generator not implemented for ") +
+                 params_.generators[i].lang_name);
+          }
+        }
+      }
+    }
+
+    if (!opts.root_type.empty()) {
+      if (!parser->SetRootType(opts.root_type.c_str()))
+        Error("unknown root type: " + opts.root_type);
+      else if (parser->root_struct_def_->fixed)
+        Error("root type must be a table");
+    }
+
+    if (opts.proto_mode) GenerateFBS(*parser.get(), output_path, filebase);
+
+    // We do not want to generate code for the definitions in this file
+    // in any files coming up next.
+    parser->MarkGenerated();
+  }
+  return 0;
+}
+
+}  // namespace flatbuffers