C# bindings generator cleanup

- Normal log messages are no longer warnings.
- BindingsGenerator is no longer a singleton.
- Added a log function.

7 files changed, 138 insertions, 107 deletions

diff --git a/modules/mono/csharp_script.cpp b/modules/mono/csharp_script.cpp
index 3c9644127c..e12a3651c7 100644
--- a/modules/mono/csharp_script.cpp
+++ b/modules/mono/csharp_script.cpp
@@ -131,14 +131,6 @@ void CSharpLanguage::finish() {
 
 	finalizing = true;
 
-#ifdef TOOLS_ENABLED
-	// Must be here, to avoid StringName leaks
-	if (BindingsGenerator::singleton) {
-		memdelete(BindingsGenerator::singleton);
-		BindingsGenerator::singleton = NULL;
-	}
-#endif
-
 	// Make sure all script binding gchandles are released before finalizing GDMono
 	for (Map<Object *, CSharpScriptBinding>::Element *E = script_bindings.front(); E; E = E->next()) {
 		CSharpScriptBinding &script_binding = E->value();
diff --git a/modules/mono/editor/bindings_generator.cpp b/modules/mono/editor/bindings_generator.cpp
index 259c0ffece..b97bcb6e77 100644
--- a/modules/mono/editor/bindings_generator.cpp
+++ b/modules/mono/editor/bindings_generator.cpp
@@ -101,10 +101,6 @@
 
 const char *BindingsGenerator::TypeInterface::DEFAULT_VARARG_C_IN("\t%0 %1_in = %1;\n");
 
-bool BindingsGenerator::verbose_output = false;
-
-BindingsGenerator *BindingsGenerator::singleton = NULL;
-
 static String fix_doc_description(const String &p_bbcode) {
 
 	// This seems to be the correct way to do this. It's the same EditorHelp does.
@@ -816,9 +812,7 @@ void BindingsGenerator::_generate_global_constants(StringBuilder &p_output) {
 
 			CRASH_COND(enum_class_name != "Variant"); // Hard-coded...
 
-			if (verbose_output) {
-				WARN_PRINTS("Declaring global enum `" + enum_proxy_name + "` inside static class `" + enum_class_name + "`");
-			}
+			_log("Declaring global enum `%s` inside static class `%s`\n", enum_proxy_name.utf8().get_data(), enum_class_name.utf8().get_data());
 
 			p_output.append("\n" INDENT1 "public static partial class ");
 			p_output.append(enum_class_name);
@@ -867,9 +861,7 @@ void BindingsGenerator::_generate_global_constants(StringBuilder &p_output) {
 	p_output.append("\n#pragma warning restore CS1591\n");
 }
 
-Error BindingsGenerator::generate_cs_core_project(const String &p_solution_dir, DotNetSolution &r_solution, bool p_verbose_output) {
-
-	verbose_output = p_verbose_output;
+Error BindingsGenerator::generate_cs_core_project(const String &p_solution_dir, DotNetSolution &r_solution) {
 
 	String proj_dir = p_solution_dir.plus_file(CORE_API_ASSEMBLY_NAME);
 
@@ -1001,15 +993,12 @@ Error BindingsGenerator::generate_cs_core_project(const String &p_solution_dir,
 
 	r_solution.add_new_project(CORE_API_ASSEMBLY_NAME, proj_info);
 
-	if (verbose_output)
-		OS::get_singleton()->print("The solution and C# project for the Core API was generated successfully\n");
+	_log("The solution and C# project for the Core API was generated successfully\n");
 
 	return OK;
 }
 
-Error BindingsGenerator::generate_cs_editor_project(const String &p_solution_dir, DotNetSolution &r_solution, bool p_verbose_output) {
-
-	verbose_output = p_verbose_output;
+Error BindingsGenerator::generate_cs_editor_project(const String &p_solution_dir, DotNetSolution &r_solution) {
 
 	String proj_dir = p_solution_dir.plus_file(EDITOR_API_ASSEMBLY_NAME);
 
@@ -1100,13 +1089,12 @@ Error BindingsGenerator::generate_cs_editor_project(const String &p_solution_dir
 
 	r_solution.add_new_project(EDITOR_API_ASSEMBLY_NAME, proj_info);
 
-	if (verbose_output)
-		OS::get_singleton()->print("The solution and C# project for the Editor API was generated successfully\n");
+	_log("The solution and C# project for the Editor API was generated successfully\n");
 
 	return OK;
 }
 
-Error BindingsGenerator::generate_cs_api(const String &p_output_dir, bool p_verbose_output) {
+Error BindingsGenerator::generate_cs_api(const String &p_output_dir) {
 
 	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
 	ERR_FAIL_COND_V(!da, ERR_CANT_CREATE);
@@ -1123,13 +1111,13 @@ Error BindingsGenerator::generate_cs_api(const String &p_output_dir, bool p_verb
 
 	Error proj_err;
 
-	proj_err = generate_cs_core_project(p_output_dir, solution, p_verbose_output);
+	proj_err = generate_cs_core_project(p_output_dir, solution);
 	if (proj_err != OK) {
 		ERR_PRINT("Generation of the Core API C# project failed");
 		return proj_err;
 	}
 
-	proj_err = generate_cs_editor_project(p_output_dir, solution, p_verbose_output);
+	proj_err = generate_cs_editor_project(p_output_dir, solution);
 	if (proj_err != OK) {
 		ERR_PRINT("Generation of the Editor API C# project failed");
 		return proj_err;
@@ -1168,8 +1156,7 @@ Error BindingsGenerator::_generate_cs_type(const TypeInterface &itype, const Str
 
 	List<InternalCall> &custom_icalls = itype.api_type == ClassDB::API_EDITOR ? editor_custom_icalls : core_custom_icalls;
 
-	if (verbose_output)
-		OS::get_singleton()->print("Generating %s.cs...\n", itype.proxy_name.utf8().get_data());
+	_log("Generating %s.cs...\n", itype.proxy_name.utf8().get_data());
 
 	String ctor_method(ICALL_PREFIX + itype.proxy_name + "_Ctor"); // Used only for derived types
 
@@ -1710,8 +1697,6 @@ Error BindingsGenerator::_generate_cs_method(const BindingsGenerator::TypeInterf
 
 Error BindingsGenerator::generate_glue(const String &p_output_dir) {
 
-	verbose_output = true;
-
 	bool dir_exists = DirAccess::exists(p_output_dir);
 	ERR_EXPLAIN("The output directory does not exist.");
 	ERR_FAIL_COND_V(!dir_exists, ERR_FILE_BAD_PATH);
@@ -2128,15 +2113,13 @@ void BindingsGenerator::_populate_object_type_interfaces() {
 		}
 
 		if (!ClassDB::is_class_exposed(type_cname)) {
-			if (verbose_output)
-				WARN_PRINTS("Ignoring type " + type_cname.operator String() + " because it's not exposed");
+			_log("Ignoring type `%s` because it's not exposed\n", String(type_cname).utf8().get_data());
 			class_list.pop_front();
 			continue;
 		}
 
 		if (!ClassDB::is_class_enabled(type_cname)) {
-			if (verbose_output)
-				WARN_PRINTS("Ignoring type " + type_cname.operator String() + " because it's not enabled");
+			_log("Ignoring type `%s` because it's not enabled\n", String(type_cname).utf8().get_data());
 			class_list.pop_front();
 			continue;
 		}
@@ -2186,12 +2169,10 @@ void BindingsGenerator::_populate_object_type_interfaces() {
 
 			iprop.proxy_name = escape_csharp_keyword(snake_to_pascal_case(iprop.cname));
 
-			// Prevent property and enclosing type from sharing the same name
+			// Prevent the property and its enclosing type from sharing the same name
 			if (iprop.proxy_name == itype.proxy_name) {
-				if (verbose_output) {
-					WARN_PRINTS("Name of property `" + iprop.proxy_name + "` is ambiguous with the name of its class `" +
-								itype.proxy_name + "`. Renaming property to `" + iprop.proxy_name + "_`");
-				}
+				_log("Name of property `%s` is ambiguous with the name of its enclosing class `%s`. Renaming property to `%s_`\n",
+						iprop.proxy_name.utf8().get_data(), itype.proxy_name.utf8().get_data(), iprop.proxy_name.utf8().get_data());
 
 				iprop.proxy_name += "_";
 			}
@@ -2258,14 +2239,13 @@ void BindingsGenerator::_populate_object_type_interfaces() {
 					// which could actually will return something different.
 					// Let's put this to notify us if that ever happens.
 					if (itype.cname != name_cache.type_Object || imethod.name != "free") {
-						if (verbose_output) {
-							WARN_PRINTS("Notification: New unexpected virtual non-overridable method found.\n"
-										"We only expected Object.free, but found " +
-										itype.name + "." + imethod.name);
-						}
+						ERR_PRINTS("Notification: New unexpected virtual non-overridable method found.\n"
+								   "We only expected Object.free, but found " +
+								   itype.name + "." + imethod.name);
 					}
 				} else {
-					ERR_PRINTS("Missing MethodBind for non-virtual method: " + itype.name + "." + imethod.name);
+					ERR_EXPLAIN("Missing MethodBind for non-virtual method: " + itype.name + "." + imethod.name);
+					ERR_FAIL();
 				}
 			} else if (return_info.type == Variant::INT && return_info.usage & PROPERTY_USAGE_CLASS_IS_ENUM) {
 				imethod.return_type.cname = return_info.class_name;
@@ -2319,12 +2299,10 @@ void BindingsGenerator::_populate_object_type_interfaces() {
 
 			imethod.proxy_name = escape_csharp_keyword(snake_to_pascal_case(imethod.name));
 
-			// Prevent naming the property and its enclosing type from sharing the same name
+			// Prevent the method and its enclosing type from sharing the same name
 			if (imethod.proxy_name == itype.proxy_name) {
-				if (verbose_output) {
-					WARN_PRINTS("Name of method `" + imethod.proxy_name + "` is ambiguous with the name of its class `" +
-								itype.proxy_name + "`. Renaming method to `" + imethod.proxy_name + "_`");
-				}
+				_log("Name of method `%s` is ambiguous with the name of its enclosing class `%s`. Renaming method to `%s_`\n",
+						imethod.proxy_name.utf8().get_data(), itype.proxy_name.utf8().get_data(), imethod.proxy_name.utf8().get_data());
 
 				imethod.proxy_name += "_";
 			}
@@ -2858,7 +2836,18 @@ void BindingsGenerator::_populate_global_constants() {
 	}
 }
 
-void BindingsGenerator::initialize() {
+void BindingsGenerator::_log(const char *p_format, ...) {
+
+	if (log_print_enabled) {
+		va_list list;
+
+		va_start(list, p_format);
+		OS::get_singleton()->print("%s", str_format(p_format, list).utf8().get_data());
+		va_end(list);
+	}
+}
+
+void BindingsGenerator::_initialize() {
 
 	EditorHelp::generate_doc();
 
@@ -2881,12 +2870,13 @@ void BindingsGenerator::initialize() {
 void BindingsGenerator::handle_cmdline_args(const List<String> &p_cmdline_args) {
 
 	const int NUM_OPTIONS = 2;
-	int options_left = NUM_OPTIONS;
-
 	String mono_glue_option = "--generate-mono-glue";
 	String cs_api_option = "--generate-cs-api";
 
-	verbose_output = true;
+	String mono_glue_path;
+	String cs_api_path;
+
+	int options_left = NUM_OPTIONS;
 
 	const List<String>::Element *elem = p_cmdline_args.front();
 
@@ -2895,8 +2885,7 @@ void BindingsGenerator::handle_cmdline_args(const List<String> &p_cmdline_args)
 			const List<String>::Element *path_elem = elem->next();
 
 			if (path_elem) {
-				if (get_singleton()->generate_glue(path_elem->get()) != OK)
-					ERR_PRINTS(mono_glue_option + ": Failed to generate mono glue");
+				mono_glue_path = path_elem->get();
 				elem = elem->next();
 			} else {
 				ERR_PRINTS(mono_glue_option + ": No output directory specified");
@@ -2907,8 +2896,7 @@ void BindingsGenerator::handle_cmdline_args(const List<String> &p_cmdline_args)
 			const List<String>::Element *path_elem = elem->next();
 
 			if (path_elem) {
-				if (get_singleton()->generate_cs_api(path_elem->get()) != OK)
-					ERR_PRINTS(cs_api_option + ": Failed to generate the C# API");
+				cs_api_path = path_elem->get();
 				elem = elem->next();
 			} else {
 				ERR_PRINTS(cs_api_option + ": No output directory specified");
@@ -2920,10 +2908,23 @@ void BindingsGenerator::handle_cmdline_args(const List<String> &p_cmdline_args)
 		elem = elem->next();
 	}
 
-	verbose_output = false;
+	if (mono_glue_path.length() || cs_api_path.length()) {
+		BindingsGenerator bindings_generator;
+		bindings_generator.set_log_print_enabled(true);
 
-	if (options_left != NUM_OPTIONS)
+		if (mono_glue_path.length()) {
+			if (bindings_generator.generate_glue(mono_glue_path) != OK)
+				ERR_PRINTS(mono_glue_option + ": Failed to generate mono glue");
+		}
+
+		if (cs_api_path.length()) {
+			if (bindings_generator.generate_cs_api(cs_api_path) != OK)
+				ERR_PRINTS(cs_api_option + ": Failed to generate the C# API");
+		}
+
+		// Exit once done
 		::exit(0);
+	}
 }
 
 #endif
diff --git a/modules/mono/editor/bindings_generator.h b/modules/mono/editor/bindings_generator.h
index a073c09910..7599c6edee 100644
--- a/modules/mono/editor/bindings_generator.h
+++ b/modules/mono/editor/bindings_generator.h
@@ -164,7 +164,6 @@ class BindingsGenerator {
 		}
 
 		MethodInterface() {
-			return_type.cname = BindingsGenerator::get_singleton()->name_cache.type_void;
 			is_vararg = false;
 			is_virtual = false;
 			requires_object_call = false;
@@ -469,7 +468,7 @@ class BindingsGenerator {
 		}
 	};
 
-	static bool verbose_output;
+	bool log_print_enabled;
 
 	OrderedHashMap<StringName, TypeInterface> obj_types;
 
@@ -515,6 +514,7 @@ class BindingsGenerator {
 			enum_Error = StaticCString::create("Error");
 		}
 
+	private:
 		NameCache(const NameCache &);
 		NameCache &operator=(const NameCache &);
 	};
@@ -578,33 +578,26 @@ class BindingsGenerator {
 
 	Error _save_file(const String &p_path, const StringBuilder &p_content);
 
-	BindingsGenerator() {}
-
-	BindingsGenerator(const BindingsGenerator &);
-	BindingsGenerator &operator=(const BindingsGenerator &);
+	void _log(const char *p_format, ...) _PRINTF_FORMAT_ATTRIBUTE_2_3;
 
-	friend class CSharpLanguage;
-	static BindingsGenerator *singleton;
+	void _initialize();
 
 public:
-	Error generate_cs_core_project(const String &p_solution_dir, DotNetSolution &r_solution, bool p_verbose_output = true);
-	Error generate_cs_editor_project(const String &p_solution_dir, DotNetSolution &r_solution, bool p_verbose_output = true);
-	Error generate_cs_api(const String &p_output_dir, bool p_verbose_output = true);
+	Error generate_cs_core_project(const String &p_solution_dir, DotNetSolution &r_solution);
+	Error generate_cs_editor_project(const String &p_solution_dir, DotNetSolution &r_solution);
+	Error generate_cs_api(const String &p_output_dir);
 	Error generate_glue(const String &p_output_dir);
 
+	void set_log_print_enabled(bool p_enabled) { log_print_enabled = p_enabled; }
+
 	static uint32_t get_version();
 
-	void initialize();
+	static void handle_cmdline_args(const List<String> &p_cmdline_args);
 
-	_FORCE_INLINE_ static BindingsGenerator *get_singleton() {
-		if (!singleton) {
-			singleton = memnew(BindingsGenerator);
-			singleton->initialize();
-		}
-		return singleton;
+	BindingsGenerator() :
+			log_print_enabled(true) {
+		_initialize();
 	}
-
-	static void handle_cmdline_args(const List<String> &p_cmdline_args);
 };
 
 #endif
diff --git a/modules/mono/editor/godotsharp_builds.cpp b/modules/mono/editor/godotsharp_builds.cpp
index 00c780d1b7..de3fd91223 100644
--- a/modules/mono/editor/godotsharp_builds.cpp
+++ b/modules/mono/editor/godotsharp_builds.cpp
@@ -323,10 +323,13 @@ bool GodotSharpBuilds::make_api_assembly(APIAssembly::Type p_api_type) {
 	String api_sln_file = api_sln_dir.plus_file(API_SOLUTION_NAME ".sln");
 
 	if (!DirAccess::exists(api_sln_dir) || !FileAccess::exists(api_sln_file)) {
-		BindingsGenerator *gen = BindingsGenerator::get_singleton();
-		bool gen_verbose = OS::get_singleton()->is_stdout_verbose();
+		BindingsGenerator bindings_generator;
 
-		Error err = gen->generate_cs_api(api_sln_dir, gen_verbose);
+		if (!OS::get_singleton()->is_stdout_verbose()) {
+			bindings_generator.set_log_print_enabled(false);
+		}
+
+		Error err = bindings_generator.generate_cs_api(api_sln_dir);
 		if (err != OK) {
 			show_build_error_dialog("Failed to generate " API_SOLUTION_NAME " solution. Error: " + itos(err));
 			return false;
diff --git a/modules/mono/mono_gd/gd_mono_log.cpp b/modules/mono/mono_gd/gd_mono_log.cpp
index 087a7a2e5c..a6e04e561d 100644
--- a/modules/mono/mono_gd/gd_mono_log.cpp
+++ b/modules/mono/mono_gd/gd_mono_log.cpp
@@ -37,6 +37,7 @@
 #include "core/os/os.h"
 
 #include "../godotsharp_dirs.h"
+#include "../utils/string_utils.h"
 
 static int log_level_get_id(const char *p_log_level) {
 
@@ -125,27 +126,6 @@ void GDMonoLog::_delete_old_log_files(const String &p_logs_dir) {
 	da->list_dir_end();
 }
 
-static String format(const char *p_fmt, ...) {
-	va_list args;
-
-	va_start(args, p_fmt);
-	int len = vsnprintf(NULL, 0, p_fmt, args);
-	va_end(args);
-
-	len += 1; // for the trailing '/0'
-
-	char *buffer(memnew_arr(char, len));
-
-	va_start(args, p_fmt);
-	vsnprintf(buffer, len, p_fmt, args);
-	va_end(args);
-
-	String res(buffer);
-	memdelete_arr(buffer);
-
-	return res;
-}
-
 void GDMonoLog::initialize() {
 
 	CharString log_level = OS::get_singleton()->get_environment("GODOT_MONO_LOG_LEVEL").utf8();
@@ -172,7 +152,7 @@ void GDMonoLog::initialize() {
 		OS::Time time_now = OS::get_singleton()->get_time();
 		int pid = OS::get_singleton()->get_process_id();
 
-		String log_file_name = format("%d_%02d_%02d %02d.%02d.%02d (%d).txt",
+		String log_file_name = str_format("%d_%02d_%02d %02d.%02d.%02d (%d).txt",
 				date_now.year, date_now.month, date_now.day,
 				time_now.hour, time_now.min, time_now.sec, pid);
 
diff --git a/modules/mono/utils/string_utils.cpp b/modules/mono/utils/string_utils.cpp
index c390f8b9c2..0ef66577fe 100644
--- a/modules/mono/utils/string_utils.cpp
+++ b/modules/mono/utils/string_utils.cpp
@@ -32,6 +32,8 @@
 
 #include "core/os/file_access.h"
 
+#include <stdio.h>
+
 namespace {
 
 int sfind(const String &p_text, int p_from) {
@@ -184,3 +186,50 @@ Error read_all_file_utf8(const String &p_path, String &r_content) {
 	r_content = source;
 	return OK;
 }
+
+// TODO: Move to variadic templates once we upgrade to C++11
+
+String str_format(const char *p_format, ...) {
+	va_list list;
+
+	va_start(list, p_format);
+	String res = str_format(p_format, list);
+	va_end(list);
+
+	return res;
+}
+// va_copy was defined in the C99, but not in C++ standards before C++11.
+// When you compile C++ without --std=c++<XX> option, compilers still define
+// va_copy, otherwise you have to use the internal version (__va_copy).
+#if !defined(va_copy)
+#if defined(__GNUC__)
+#define va_copy(d, s) __va_copy((d), (s))
+#else
+#define va_copy(d, s) ((d) = (s))
+#endif
+#endif
+
+#if defined(MINGW_ENABLED) || defined(_MSC_VER)
+#define vsnprintf vsnprintf_s
+#endif
+
+String str_format(const char *p_format, va_list p_list) {
+	va_list list;
+
+	va_copy(list, p_list);
+	int len = vsnprintf(NULL, 0, p_format, list);
+	va_end(list);
+
+	len += 1; // for the trailing '/0'
+
+	char *buffer(memnew_arr(char, len));
+
+	va_copy(list, p_list);
+	vsnprintf(buffer, len, p_format, list);
+	va_end(list);
+
+	String res(buffer);
+	memdelete_arr(buffer);
+
+	return res;
+}
diff --git a/modules/mono/utils/string_utils.h b/modules/mono/utils/string_utils.h
index 61765ccfd8..565b9bb644 100644
--- a/modules/mono/utils/string_utils.h
+++ b/modules/mono/utils/string_utils.h
@@ -34,6 +34,8 @@
 #include "core/ustring.h"
 #include "core/variant.h"
 
+#include <stdarg.h>
+
 String sformat(const String &p_text, const Variant &p1 = Variant(), const Variant &p2 = Variant(), const Variant &p3 = Variant(), const Variant &p4 = Variant(), const Variant &p5 = Variant());
 
 #ifdef TOOLS_ENABLED
@@ -44,4 +46,15 @@ String escape_csharp_keyword(const String &p_name);
 
 Error read_all_file_utf8(const String &p_path, String &r_content);
 
+#if defined(__GNUC__)
+#define _PRINTF_FORMAT_ATTRIBUTE_1_0 __attribute__((format(printf, 1, 0)))
+#define _PRINTF_FORMAT_ATTRIBUTE_1_2 __attribute__((format(printf, 1, 2)))
+#else
+#define _PRINTF_FORMAT_ATTRIBUTE_1_0
+#define _PRINTF_FORMAT_ATTRIBUTE_1_2
+#endif
+
+String str_format(const char *p_format, ...) _PRINTF_FORMAT_ATTRIBUTE_1_2;
+String str_format(const char *p_format, va_list p_list) _PRINTF_FORMAT_ATTRIBUTE_1_0;
+
 #endif // STRING_FORMAT_H