GBA: Add "super-minimal" core configuration, useful for cores-as-plugins, e.g. for libretro

CMakeLists.txt

@@ -37,7 +37,7 @@ file(GLOB GUI_SRC ${CMAKE_SOURCE_DIR}/src/util/gui/*.c ${CMAKE_SOURCE_DIR}/src/g
 file(GLOB RENDERER_SRC ${CMAKE_SOURCE_DIR}/src/gba/renderers/*.c)
 file(GLOB SIO_SRC ${CMAKE_SOURCE_DIR}/src/gba/sio/lockstep.c)
 file(GLOB THIRD_PARTY_SRC ${CMAKE_SOURCE_DIR}/src/third-party/inih/*.c)
-list(APPEND UTIL_SRC ${CMAKE_SOURCE_DIR}/src/platform/commandline.c)
+list(APPEND GBA_SV_SRC ${CMAKE_SOURCE_DIR}/src/platform/commandline.c)
 set(CORE_VFS_SRC ${CMAKE_SOURCE_DIR}/src/util/vfs/vfs-mem.c)
 set(VFS_SRC)
 source_group("ARM core" FILES ${ARM_SRC})
@@ -553,7 +553,7 @@ endif()
 if(BUILD_LIBRETRO)
 	file(GLOB RETRO_SRC ${CMAKE_SOURCE_DIR}/src/platform/libretro/*.c)
 	add_library(${BINARY_NAME}_libretro SHARED ${CORE_SRC} ${RETRO_SRC})
-	set_target_properties(${BINARY_NAME}_libretro PROPERTIES PREFIX "" COMPILE_DEFINITIONS "COLOR_16_BIT;COLOR_5_6_5;DISABLE_THREADING;${OS_DEFINES};${FUNCTION_DEFINES}")
+	set_target_properties(${BINARY_NAME}_libretro PROPERTIES PREFIX "" COMPILE_DEFINITIONS "COLOR_16_BIT;COLOR_5_6_5;DISABLE_THREADING;${OS_DEFINES};${FUNCTION_DEFINES};MINIMAL_CORE=2")
 	target_link_libraries(${BINARY_NAME}_libretro ${OS_LIB})
 	install(TARGETS ${BINARY_NAME}_libretro LIBRARY DESTINATION ${LIBDIR} COMPONENT ${BINARY_NAME}_libretro NAMELINK_SKIP)
 endif()

src/gba/context/config.c

@@ -132,6 +132,7 @@ void GBAConfigDeinit(struct GBAConfig* config) {
 	free(config->port);
 }
 
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 bool GBAConfigLoad(struct GBAConfig* config) {
 	char path[PATH_MAX];
 	GBAConfigDirectory(path, PATH_MAX);
@@ -231,6 +232,7 @@ void GBAConfigDirectory(char* out, size_t outLength) {
 	mkdir(out, 0755);
 #endif
 }
+#endif
 
 const char* GBAConfigGetValue(const struct GBAConfig* config, const char* key) {
 	return _lookupValue(config, key);

src/gba/context/config.h

@@ -52,6 +52,7 @@ struct GBAOptions {
 void GBAConfigInit(struct GBAConfig*, const char* port);
 void GBAConfigDeinit(struct GBAConfig*);
 
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 bool GBAConfigLoad(struct GBAConfig*);
 bool GBAConfigSave(const struct GBAConfig*);
 bool GBAConfigLoadPath(struct GBAConfig*, const char* path);
@@ -59,6 +60,7 @@ bool GBAConfigSavePath(const struct GBAConfig*, const char* path);
 
 void GBAConfigMakePortable(const struct GBAConfig*);
 void GBAConfigDirectory(char* out, size_t outLength);
+#endif
 
 const char* GBAConfigGetValue(const struct GBAConfig*, const char* key);
 bool GBAConfigGetIntValue(const struct GBAConfig*, const char* key, int* value);

src/gba/context/context.c

@@ -38,6 +38,7 @@ bool GBAContextInit(struct GBAContext* context, const char* port) {
 	ARMInit(context->cpu);
 
 	GBAConfigInit(&context->config, port);
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 	if (port) {
 		if (!_logFile) {
 			char logPath[PATH_MAX];
@@ -60,6 +61,9 @@ bool GBAContextInit(struct GBAContext* context, const char* port) {
 		GBAConfigLoad(&context->config);
 		GBAConfigLoadDefaults(&context->config, &opts);
 	}
+#else
+	UNUSED(port);
+#endif
 
 	context->gba->sync = 0;
 	return true;
@@ -70,7 +74,9 @@ void GBAContextDeinit(struct GBAContext* context) {
 	GBADestroy(context->gba);
 	mappedMemoryFree(context->gba, 0);
 	mappedMemoryFree(context->cpu, 0);
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 	GBAConfigDeinit(&context->config);
+#endif
 	GBADirectorySetDeinit(&context->dirs);
 }
 
@@ -81,15 +87,18 @@ bool GBAContextLoadROM(struct GBAContext* context, const char* path, bool autolo
 	}
 
 	context->fname = path;
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 	if (autoloadSave) {
 		char dirname[PATH_MAX];
 		char basename[PATH_MAX];
 		separatePath(context->fname, dirname, basename, 0);
-		// TODO: Remove autoloadSave
 		GBADirectorySetAttachBase(&context->dirs, VDirOpen(dirname));
 		strncat(basename, ".sav", PATH_MAX - strlen(basename) - 1);
 		context->save = context->dirs.save->openFile(context->dirs.save, basename, O_RDWR | O_CREAT);
 	}
+#else
+	UNUSED(autoloadSave);
+#endif
 	return true;
 }
 
@@ -154,7 +163,9 @@ bool GBAContextStart(struct GBAContext* context) {
 		return false;
 	}
 
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 	GBAConfigMap(&context->config, &opts);
+#endif
 
 	if (!context->bios && opts.bios) {
 		GBAContextLoadBIOS(context, opts.bios);
@@ -175,10 +186,14 @@ bool GBAContextStart(struct GBAContext* context) {
 	struct GBACartridgeOverride override;
 	const struct GBACartridge* cart = (const struct GBACartridge*) context->gba->memory.rom;
 	memcpy(override.id, &cart->id, sizeof(override.id));
-	if (GBAOverrideFind(GBAConfigGetOverrides(&context->config), &override)) {
+	struct Configuration* overrides = 0;
+#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
+	overrides = GBAConfigGetOverrides(&context->config);
+	GBAConfigFreeOpts(&opts);
+#endif
+	if (GBAOverrideFind(overrides, &override)) {
 		GBAOverrideApply(context->gba, &override);
 	}
-	GBAConfigFreeOpts(&opts);
 	return true;
 }