SCI: FileIO subop 19 checks for directory validity

This is used in Torin's Passage and LSL7 when autosaving

2 files changed, 9 insertions, 2 deletions

diff --git a/engines/sci/engine/kernel_tables.h b/engines/sci/engine/kernel_tables.h
index 322d82ea08..69baa1cf47 100644
--- a/engines/sci/engine/kernel_tables.h
+++ b/engines/sci/engine/kernel_tables.h
@@ -240,7 +240,7 @@ static const SciKernelMapSubEntry kFileIO_subops[] = {
 	{ SIG_SCI32,          16, MAP_CALL(FileIOWriteWord),           "ii",                   NULL },
 	{ SIG_SCI32,          17, MAP_CALL(FileIOCreateSaveSlot),      "ir",                   NULL },
 	{ SIG_SCI32,          18, MAP_EMPTY(FileIOChangeDirectory),    "r",                    NULL }, // for SQ6, when changing the savegame directory in the save/load dialog
-	{ SIG_SCI32,          19, MAP_CALL(Stub),                      "r",                    NULL }, // for Torin / Torin demo
+	{ SIG_SCI32,          19, MAP_CALL(FileIOIsValidDirectory),    "r",                    NULL }, // for Torin / Torin demo
 #endif
 	SCI_SUBOPENTRY_TERMINATOR
 };
diff --git a/engines/sci/engine/kfile.cpp b/engines/sci/engine/kfile.cpp
index a21e19802d..786276221c 100644
--- a/engines/sci/engine/kfile.cpp
+++ b/engines/sci/engine/kfile.cpp
@@ -688,6 +688,13 @@ reg_t kFileIOCreateSaveSlot(EngineState *s, int argc, reg_t *argv) {
 	return TRUE_REG;	// slot creation was successful
 }
 
+reg_t kFileIOIsValidDirectory(EngineState *s, int argc, reg_t *argv) {
+	// Used in Torin's Passage and LSL7 to determine if the directory passed as
+	// a parameter (usually the save directory) is valid. We always return true
+	// here.
+	return TRUE_REG;
+}
+
 #endif
 
 // ---- Save operations -------------------------------------------------------
@@ -1002,7 +1009,7 @@ reg_t kAutoSave(EngineState *s, int argc, reg_t *argv) {
 	// the elapsed time from the timer object)
 
 	// This function has to return something other than 0 to proceed
-	return s->r_acc;
+	return TRUE_REG;
 }
 
 #endif