symbols for engine module are now generated into a header

Started to to use gencpp to codegen.

Now instead of loading the symbol table file made by the build script I can just have it get directly compiled.

.vscode/bookmarks.json

@@ -4,32 +4,32 @@
 			"path": "project/platform/win32_platform.cpp",
 			"bookmarks": [
 				{
-					"line": 57,
+					"line": 59,
 					"column": 0,
 					"label": "Struct Defs"
 				},
 				{
-					"line": 96,
+					"line": 98,
 					"column": 0,
 					"label": "Static Data"
 				},
 				{
-					"line": 629,
+					"line": 631,
 					"column": 0,
 					"label": "Timing"
 				},
 				{
-					"line": 1478,
+					"line": 1453,
 					"column": 4,
 					"label": "Main Loop : Audio Processing"
 				},
 				{
-					"line": 1597,
+					"line": 1572,
 					"column": 2,
 					"label": "Main Loop : Timing Update"
 				},
 				{
-					"line": 1681,
+					"line": 1656,
 					"column": 0,
 					"label": "Main Loop : End"
 				}

.vscode/launch.json

@@ -12,6 +12,15 @@
 			"args": [],
 			"cwd": "${workspaceFolder}/data/binaries/",
 			"visualizerFile": "${workspaceFolder}/scripts/handmade.natvis"
+		},
+		{
+			"type":"cppvsdbg",
+			"request": "launch",
+			"name" : "Debug handmade platform gen msvc",
+			"program": "${workspaceFolder}/build/handmade_platform_gen.exe",
+			"args": [],
+			"cwd": "${workspaceFolder}/build",
+			"visualizerFile": "${workspaceFolder}/scripts/handmade.natvis"
 		}
 	]
 }

data/binaries/handmade_engine.symbols

@@ -1,5 +0,0 @@
-?on_module_reload@engine@@YAXPEAUMemory@1@PEAUModuleAPI@platform@@@Z
-?startup@engine@@YAXPEAUMemory@1@PEAUModuleAPI@platform@@@Z
-?shutdown@engine@@YAXPEAUMemory@1@PEAUModuleAPI@platform@@@Z
-?update_and_render@engine@@YAXPEAUInputState@1@PEAUOffscreenBuffer@1@PEAUMemory@1@PEAUModuleAPI@platform@@@Z
-?update_audio@engine@@YAXPEAUAudioBuffer@1@PEAUMemory@1@PEAUModuleAPI@platform@@@Z

project/codegen/Readme.md

@@ -0,0 +1,4 @@
+# Project Code Generation
+
+This directory contains metaprograms that generate code for the project.
+Any code generated will be put into `*.gen.cpp` files within a gen folder for the respective module the metaprogram is generating for.

project/codegen/handmade_engine_gen.cpp

@@ -9,9 +9,11 @@ using namespace gen;
 int gen_main()
 {
 	gen::init();
-	log_fmt("Generating code for Handmade Hero\n");
+	log_fmt("Generating code for Handmade Hero: Engine Module\n");
 
-	log_fmt("Generaton finished for Handmade Hero\n");
+	
+
+	log_fmt("Generaton finished for Handmade Hero: Engine Module\n");
 	// gen::deinit();
 	return 0;
 }

project/codegen/handmade_platform_gen.cpp

@@ -0,0 +1,101 @@
+#if GEN_TIME
+#define GEN_DEFINE_LIBRARY_CODE_CONSTANTS
+#define GEN_IMPLEMENTATION
+#define GEN_BENCHMARK
+#define GEN_ENFORCE_STRONG_CODE_TYPES
+#include "dependencies/gen.hpp"
+using namespace gen;
+
+#include "platform/platform_engine_api.hpp"
+constexpr StrC fname_handmade_engine_symbols = txt("handmade_engine.symbols");
+
+String get_symbol_from_module_table( FileContents symbol_table, u32 symbol_ID )
+{
+	struct Token
+	{
+		char const* Ptr;
+		u32         Len;
+	};
+
+	Token tokens[256] = {};
+
+	char const* scanner = rcast( char const*, symbol_table.data );
+	u32 left = symbol_table.size;
+	u32 line = 0;
+	while ( left )
+	{
+		if ( *scanner == '\n' || *scanner == '\r' )
+		{
+			++ scanner;
+			-- left;
+		}
+		else
+		{
+			tokens[line].Ptr = scanner;
+			while ( left && *scanner != '\r' && *scanner != '\n' )
+			{
+				-- left;
+				++ scanner;
+				++ tokens[line].Len;
+			}
+
+			if ( line == symbol_ID )
+			{
+				String result = String::make_length( GlobalAllocator, tokens[line].Ptr, tokens[line].Len );
+				return result;
+			}
+			++ line;
+		}
+	}
+	return {};
+}
+
+int gen_main()
+{
+	gen::init();
+	log_fmt("Generating code for Handmade Hero: Platfom Module\n");
+
+	FileContents symbol_table = file_read_contents( GlobalAllocator, true, fname_handmade_engine_symbols );
+
+#pragma push_macro("str_ascii")
+#undef str_ascii
+	Builder builder = Builder::open( "engine_symbol_table.hpp" );
+	builder.print( pragma_once );
+	builder.print( def_include( txt("platform/platform.hpp") ) );
+	builder.print( fmt_newline );
+	builder.print_fmt( "NS_ENGINE_BEGIN\n\n" );
+
+	StrC symbol_on_module_load    = get_symbol_from_module_table( symbol_table, engine::ModuleAPI::Sym_OnModuleReload );
+	StrC symbol_startup           = get_symbol_from_module_table( symbol_table, engine::ModuleAPI::Sym_Startup );
+	StrC symbol_shutdown          = get_symbol_from_module_table( symbol_table, engine::ModuleAPI::Sym_Shutdown );
+	StrC symbol_update_and_render = get_symbol_from_module_table( symbol_table, engine::ModuleAPI::Sym_UpdateAndRender );
+	StrC symbol_update_audio      = get_symbol_from_module_table( symbol_table, engine::ModuleAPI::Sym_UpdateAudio );
+
+
+	builder.print( parse_variable( token_fmt( "symbol", symbol_on_module_load, stringize(
+		constexpr const Str symbol_on_module_load = str_ascii("<symbol>");
+	))));
+	builder.print( parse_variable( token_fmt( "symbol", symbol_startup, stringize(
+		constexpr const Str symbol_startup = str_ascii("<symbol>");
+	))));
+	builder.print( parse_variable( token_fmt( "symbol", symbol_shutdown, stringize(
+		constexpr const Str symbol_shutdown = str_ascii("<symbol>");
+	))));
+	builder.print( parse_variable( token_fmt( "symbol", symbol_update_and_render, stringize(
+		constexpr const Str symbol_update_and_render = str_ascii("<symbol>");
+	))));
+	builder.print( parse_variable( token_fmt( "symbol", symbol_update_audio, stringize(
+		constexpr const Str symbol_update_audio = str_ascii("<symbol>");
+	))));
+
+	builder.print_fmt( "\nNS_ENGINE_END" );
+	builder.print( fmt_newline );
+	builder.write();
+#pragma pop_macro("str_ascii")
+
+	log_fmt("Generaton finished for Handmade Hero: Platform Module\n");
+	// gen::deinit();
+	return 0;
+}
+#endif
+

project/dependencies/gen.hpp

@@ -23056,7 +23056,7 @@ internal CodeVar parse_variable()
 
 		// Ignore const specifiers, they're handled by the type
 		if ( spec == ESpecifier::Const )
-			continue;
+			break;
 
 		specs_found[ NumSpecifiers ] = spec;
 		NumSpecifiers++;

project/gen/Readme.md

@@ -0,0 +1,3 @@
+# Universal Generated Code
+
+This is for generated code used for multiple modules.

project/gen/engine_symbol_table.hpp

@@ -0,0 +1,17 @@
+#pragma once
+#include "platform/platform.hpp"
+
+NS_ENGINE_BEGIN
+
+constexpr 
+Str const  symbol_on_module_load = str_ascii("?on_module_reload@engine@@YAXPEAUMemory@1@PEAUModuleAPI@platform@@@Z");
+constexpr 
+Str const  symbol_startup = str_ascii("?startup@engine@@YAXPEAUMemory@1@PEAUModuleAPI@platform@@@Z");
+constexpr 
+Str const  symbol_shutdown = str_ascii("?shutdown@engine@@YAXPEAUMemory@1@PEAUModuleAPI@platform@@@Z");
+constexpr 
+Str const  symbol_update_and_render = str_ascii("?update_and_render@engine@@YAXPEAUInputState@1@PEAUOffscreenBuffer@1@PEAUMemory@1@PEAUModuleAPI@platform@@@Z");
+constexpr 
+Str const  symbol_update_audio = str_ascii("?update_audio@engine@@YAXPEAUAudioBuffer@1@PEAUMemory@1@PEAUModuleAPI@platform@@@Z");
+
+NS_ENGINE_END

project/platform/platform.hpp

@@ -53,51 +53,6 @@ struct File
 	u32   Size;
 };
 
-// TODO(Ed): This also assumes the symbol name is always within size of the provided buffer, needs to fail if not.
-// Note: This is a temporary solution until there is more infrastructure for the engine to use.
-void get_symbol_from_module_table( File symbol_table, u32 symbol_ID, char* symbol_name )
-{
-	struct Token
-	{
-		char const* Ptr;
-		u32         Len;
-	};
-
-	Token tokens[256] = {};
-	s32 idx = 0;
-
-	char const* scanner = rcast( char const*, symbol_table.Data );
-	u32 left = symbol_table.Size;
-	while ( left )
-	{
-		if ( *scanner == '\n' || *scanner == '\r' )
-		{
-			++ scanner;
-			-- left;
-		}
-		else
-		{
-			tokens[idx].Ptr = scanner;
-			while ( left && *scanner != '\r' && *scanner != '\n' )
-			{
-				-- left;
-				++ scanner;
-				++ tokens[idx].Len;
-			}
-			++ idx;
-		}
-	}
-
-	Token& token = tokens[symbol_ID];
-	while ( token.Len -- )
-	{
-		*symbol_name = *token.Ptr;
-		++ symbol_name;
-		++ token.Ptr;
-	}
-	*symbol_name = '\0';
-}
-
 #pragma region Settings Exposure
 // Exposing specific properties for user configuration in settings
 

project/platform/win32_platform.cpp

@@ -26,6 +26,8 @@
 #include "engine/engine.hpp"
 #include "platform_engine_api.hpp"
 
+#include "gen/engine_symbol_table.hpp"
+
 #if 1
 // TODO(Ed): Redo these macros properly later.
 
@@ -1086,39 +1088,12 @@ engine::ModuleAPI load_engine_module_api()
 		return {};
 	}
 
-	constexpr Str fname_handmade_engine_symbols = str_ascii("handmade_engine.symbols");
-
-	StrFixed< S16_MAX > path_handmade_engine_symbols { 0, {} };
-	path_handmade_engine_symbols.concat( Path_Binaries, fname_handmade_engine_symbols );
-
-	File symbol_table {};
-	symbol_table.Path = path_handmade_engine_symbols;
-	if ( file_read_content( & symbol_table ), symbol_table.Size == 0 )
-	{
-		fatal( "Failed to load symbol table for handmade engine module!" );
-		return {};
-	}
-
-	// TODO(Ed) : Clean this up later when Casey makes strings. (If he doesn't we'll do it)
-	char symbol_on_module_reload[256];
-	char symboL_startup[256];
-	char symboL_shutdown[256];
-	char symboL_update_and_render[256];
-	char symbol_update_audio[256];
-	get_symbol_from_module_table( symbol_table, ModuleAPI::Sym_OnModuleReload,  symbol_on_module_reload );
-	get_symbol_from_module_table( symbol_table, ModuleAPI::Sym_Startup,         symboL_startup );
-	get_symbol_from_module_table( symbol_table, ModuleAPI::Sym_Shutdown,        symboL_shutdown );
-	get_symbol_from_module_table( symbol_table, ModuleAPI::Sym_UpdateAndRender, symboL_update_and_render );
-	get_symbol_from_module_table( symbol_table, ModuleAPI::Sym_UpdateAudio,     symbol_update_audio );
-
-	file_close( & symbol_table );
-
 	engine::ModuleAPI engine_api {};
-	engine_api.on_module_reload  = get_procedure_from_library< engine::OnModuleRelaodFn > ( Lib_Handmade_Engine, symbol_on_module_reload );
-	engine_api.startup           = get_procedure_from_library< engine::StartupFn >        ( Lib_Handmade_Engine, symboL_startup );
-	engine_api.shutdown          = get_procedure_from_library< engine::ShutdownFn >       ( Lib_Handmade_Engine, symboL_shutdown );
-	engine_api.update_and_render = get_procedure_from_library< engine::UpdateAndRenderFn >( Lib_Handmade_Engine, symboL_update_and_render );
-	engine_api.update_audio      = get_procedure_from_library< engine::UpdateAudioFn >    ( Lib_Handmade_Engine, symbol_update_audio );
+	engine_api.on_module_reload  = get_procedure_from_library< engine::OnModuleRelaodFn > ( Lib_Handmade_Engine, engine::symbol_on_module_load );
+	engine_api.startup           = get_procedure_from_library< engine::StartupFn >        ( Lib_Handmade_Engine, engine::symbol_startup );
+	engine_api.shutdown          = get_procedure_from_library< engine::ShutdownFn >       ( Lib_Handmade_Engine, engine::symbol_shutdown );
+	engine_api.update_and_render = get_procedure_from_library< engine::UpdateAndRenderFn >( Lib_Handmade_Engine, engine::symbol_update_and_render );
+	engine_api.update_audio      = get_procedure_from_library< engine::UpdateAudioFn >    ( Lib_Handmade_Engine, engine::symbol_update_audio );
 
 	engine_api.IsValid =
 			engine_api.on_module_reload

scripts/build.ps1

@@ -3,6 +3,7 @@ Clear-Host
 $target_arch = Join-Path $PSScriptRoot 'helpers/target_arch.psm1'
 $devshell    = Join-Path $PSScriptRoot 'helpers/devshell.ps1'
 $path_root   = git rev-parse --show-toplevel
+$path_build  = Join-Path $path_root    'build'
 
 Import-Module $target_arch
 
@@ -196,6 +197,8 @@ if ( $vendor -match "clang" )
 
 		$object = $unit -replace '\.cpp', '.obj'
 		$map    = $unit -replace '\.cpp', '.map'
+		$object = join-path $path_build (split-path $object -Leaf)
+		$map    = join-path $path_build (split-path $map    -Leaf)
 
 		# The PDB file has to also be time-stamped so that we can reload the DLL at runtime
 		$timestamp = Get-Date -Format "yyyy-MM-dd_HH-mm-ss"
@@ -315,8 +318,8 @@ if ( $vendor -match "msvc" )
 
 		$object = $unit -replace '\.(cpp)$', '.obj'
 		$map    = $unit -replace '\.(cpp)$', '.map'
-		$object = $object -replace '\bproject\b', 'build'
-		$map    = $map    -replace '\bproject\b', 'build'
+		$object = join-path $path_build (split-path $object -Leaf)
+		$map    = join-path $path_build (split-path $map    -Leaf)
 
 		# The PDB file has to also be time-stamped so that we can reload the DLL at runtime
 		$timestamp = Get-Date -Format "yyyy-MM-dd_HH-mm-ss"
@@ -391,10 +394,10 @@ if ( $vendor -match "msvc" )
 
 #region Building
 $path_project  = Join-Path $path_root    'project'
-$path_build    = Join-Path $path_root    'build'
 $path_data     = Join-Path $path_root	 'data'
 $path_binaries = Join-Path $path_data    'binaries'
 $path_deps     = Join-Path $path_project 'dependencies'
+$path_codegen  = Join-Path $path_project 'codegen'
 $path_gen      = Join-Path $path_project 'gen'
 $path_platform = Join-Path $path_project 'platform'
 $path_engine   = Join-Path $path_project 'engine'
@@ -413,36 +416,6 @@ if ( (Test-Path $path_binaries) -eq $false ) {
 	New-Item $path_binaries -ItemType Directory
 }
 
-#region Handmade Generate
-if ( $false ) {
-	$includes = @(
-		$path_project,
-		$path_gen,
-		# $path_deps,
-		$path_platform
-	)
-	$compiler_args = @()
-	$compiler_args += ( $flag_define + 'GEN_TIME' )
-
-	$linker_args = @(
-		$flag_link_win_subsystem_console
-	)
-
-	$unit       = Join-Path $path_gen   'handmade_gen.cpp'
-	$executable = Join-Path $path_build 'handmade_gen.exe'
-
-	build-simple $includes $compiler_args $linker_args $unit $executable
-	write-host
-
-	& $executable
-	write-host
-
-	if ( $false ) {
-		Remove-Item (Get-ChildItem -Path $path_build -Recurse -Force)
-	}
-}
-#endregion Handmade Generate
-
 #region Handmade Runtime
 $includes = @(
 	$path_project
@@ -576,7 +549,7 @@ if ( $engine )
 		}
 
 		# Write the symbol table to a file
-		$path_engine_symbols = Join-Path $path_binaries 'handmade_engine.symbols'
+		$path_engine_symbols = Join-Path $path_build 'handmade_engine.symbols'
 		$engine_symbols.Values | Out-File -Path $path_engine_symbols
 	}
 
@@ -585,6 +558,32 @@ if ( $engine )
 
 if ( $platform )
 {
+
+	#region CodeGen
+	if ( $true ) {
+		$engine_codegen_compiler_args = @()
+		$engine_codegen_compiler_args += ( $flag_define + 'GEN_TIME' )
+
+		$engine_codegen_linker_args = @(
+			$flag_link_win_subsystem_console
+		)
+
+		$unit       = Join-Path $path_codegen 'handmade_platform_gen.cpp'
+		$executable = Join-Path $path_build   'handmade_platform_gen.exe'
+
+		build-simple $includes $engine_codegen_compiler_args $engine_codegen_linker_args $unit $executable
+		write-host
+
+		Push-Location $path_build
+		& $executable
+		Pop-Location
+		write-host
+
+		$path_generated_file = Join-Path $path_build 'engine_symbol_table.hpp'
+		move-item $path_generated_file (join-path $path_gen (split-path $path_generated_file -leaf)) -Force
+	}
+	#endregion CodeGen
+
 	# Delete old PDBs 
 	$pdb_files = Get-ChildItem -Path $path_binaries -Filter "handmade_win32_*.pdb"
 	foreach ($file in $pdb_files) {
@@ -604,7 +603,7 @@ if ( $platform )
 		$lib_jsl,
 
 		$flag_link_win_subsystem_windows
-		# $flag_link_optimize_references
+		$flag_link_optimize_references
 	)
 
 	$unit       = Join-Path $path_project  'handmade_win32.cpp'

scripts/clean.ps1

@@ -13,3 +13,4 @@ if ( Test-Path $path_build ) {
 if ( Test-Path $path_binaries ) {
 	Remove-Item -verbose $path_binaries -Recurse
 }
+