GLK: ALAN3: Add loading savegame from launcher

engines/glk/alan3/alan3.cpp

@@ -41,8 +41,7 @@ namespace Alan3 {
 
 Alan3 *g_vm = nullptr;
 
-Alan3::Alan3(OSystem *syst, const GlkGameDescription &gameDesc) : GlkIO(syst, gameDesc),
-	vm_exited_cleanly(false), _pendingLook(false) {
+Alan3::Alan3(OSystem *syst, const GlkGameDescription &gameDesc) : GlkIO(syst, gameDesc) {
 	g_vm = this;
 
 	// main

engines/glk/alan3/alan3.h

@@ -33,9 +33,7 @@ namespace Alan3 {
  */
 class Alan3 : public GlkIO {
 public:
-	bool vm_exited_cleanly;
 	Common::String _advName;
-	bool _pendingLook;
 private:
 	/**
 	 * Initialization
@@ -73,7 +71,7 @@ class Alan3 : public GlkIO {
 	 * Save the game. The passed write stream represents access to the UMem chunk
 	 * in the Quetzal save file that will be created
 	 */
-	virtual Common::Error writeGameData(Common::WriteStream *ws) override;
+	virtual Common::Error writeGameData(Common::WriteStream *ws) override;;
 };
 
 extern Alan3 *g_vm;

engines/glk/alan3/glkio.cpp

@@ -62,21 +62,21 @@ void GlkIO::print(const char *fmt, ...) {
 
 	va_list argp;
 	va_start(argp, fmt);
+	Common::String str = Common::String::vformat(fmt, argp);
+	va_end(argp);
+
 	if (glkMainWin) {
-		char buf[1024]; /* FIXME: buf size should be foolproof */
-		vsprintf(buf, fmt, argp);
-		glk_put_string(buf);
+		glk_put_string(str.c_str());
 	} else {
 		// assume stdio is available in this case only
-		Common::String str = Common::String::vformat(fmt, argp);
-		warning(fmt, argp);
+		warning("%s", str.c_str());
 	}
-
-	va_end(argp);
 }
 
 void GlkIO::showImage(int image, int align) {
 	uint ecode;
+	if (_saveSlot != -1)
+		return;
 
 	if ((glk_gestalt(gestalt_Graphics, 0) == 1) &&
 		(glk_gestalt(gestalt_DrawImage, wintype_TextBuffer) == 1)) {
@@ -88,6 +88,9 @@ void GlkIO::showImage(int image, int align) {
 }
 
 void GlkIO::playSound(int sound) {
+	if (_saveSlot != -1)
+		return;
+
 #ifdef GLK_MODULE_SOUND
 	static schanid_t soundChannel = NULL;
 
@@ -127,8 +130,7 @@ void GlkIO::statusLine(CONTEXT) {
 	char line[100];
 	int pcol = col;
 
-	if (!statusLineOption) return;
-	if (glkStatusWin == NULL)
+	if (!statusLineOption || _saveSlot != -1 || glkStatusWin == nullptr)
 		return;
 
 	glk_set_window(glkStatusWin);
@@ -171,7 +173,13 @@ bool GlkIO::readLine(CONTEXT, char *buffer, size_t maxLen) {
 	static frefid_t commandFileRef;
 	static strid_t commandFile;
 
-	if (readingCommands) {
+	if (_saveSlot != -1) {
+		// Return a "restore" command
+		forcePrint("> ");
+		forcePrint("restore\n");
+		strcpy(buffer, "restore");
+
+	} else if (readingCommands) {
 		if (glk_get_line_stream(commandFile, buffer, maxLen) == 0) {
 			glk_stream_close(commandFile, NULL);
 			readingCommands = FALSE;
@@ -180,6 +188,7 @@ bool GlkIO::readLine(CONTEXT, char *buffer, size_t maxLen) {
 			printf(buffer);
 			glk_set_style(style_Normal);
 		}
+
 	} else {
 		glk_request_line_event(glkMainWin, buffer, maxLen, 0);
 
@@ -214,5 +223,15 @@ bool GlkIO::readLine(CONTEXT, char *buffer, size_t maxLen) {
 	return TRUE;
 }
 
+Common::Error GlkIO::loadGame() {
+	if (_saveSlot != -1) {
+		int saveSlot = _saveSlot;
+		_saveSlot = -1;
+		return loadGameState(saveSlot);
+	} else {
+		return GlkAPI::loadGame();
+	}
+}
+
 } // End of namespace Alan3
 } // End of namespace Glk

engines/glk/alan3/glkio.h

@@ -48,7 +48,17 @@ class GlkIO : public GlkAPI {
 	 */
 	GlkIO(OSystem *syst, const GlkGameDescription &gameDesc);
 
-	void print(const char *, ...);
+	/**
+	 * Print a string to the window
+	 */
+	void print(const char *fmt, ...);
+
+	/**
+	 * Outputs a string to the window, even during startup
+	 */
+	void forcePrint(const char *str) {
+		glk_put_string(str);
+	}
 
 	void showImage(int image, int align);
 
@@ -66,9 +76,15 @@ class GlkIO : public GlkAPI {
 
 	void flowBreak() {
 		/* Make a new paragraph, i.e one empty line (one or two newlines). */
-		if (glk_gestalt(gestalt_Graphics, 0) == 1)
+		if (_saveSlot == -1 && glk_gestalt(gestalt_Graphics, 0) == 1)
 			glk_window_flow_break(glkMainWin);
 	}
+
+	/**
+	 * If a savegame was selected to be loaded from the launcher, then load it.
+	 * Otherwise, prompt the user for a savegame to load, and then load it
+	 */
+	Common::Error loadGame();
 };
 
 extern GlkIO *g_io;

engines/glk/alan3/inter.cpp

@@ -21,6 +21,7 @@
  */
 
 #include "glk/alan3/inter.h"
+#include "glk/alan3/alan3.h"
 #include "glk/alan3/current.h"
 #include "glk/alan3/exe.h"
 #include "glk/alan3/syserr.h"