data path support for ios

Author: lucylq

extension/apple/ExecuTorch/Exported/ExecuTorchModule.h

@@ -123,6 +123,21 @@ NS_SWIFT_NAME(Module)
 __attribute__((deprecated("This API is experimental.")))
 @interface ExecuTorchModule : NSObject
 
+/**
+ * Initializes a module with a file path, data path and a specified load mode.
+ *
+ * @param filePath A string representing the path to the ExecuTorch program file.
+ * @param dataFilePath A string representing the path to a .ptd file with
+ * external tensors and external data.
+ * @param loadMode A value from ExecuTorchModuleLoadMode that determines the
+ * file loading behavior.
+ * @return An initialized ExecuTorchModule instance.
+ */
+- (instancetype)initWithFilePath:(NSString *)filePath
+                        dataFilePath:(NSString *)dataPath
+                        loadMode:(ExecuTorchModuleLoadMode)loadMode
+    NS_DESIGNATED_INITIALIZER;
+
 /**
  * Initializes a module with a file path and a specified load mode.
  *

extension/apple/ExecuTorch/Exported/ExecuTorchModule.mm

@@ -249,6 +249,22 @@ @implementation ExecuTorchModule {
   NSMutableDictionary<NSString *, NSMutableArray<ExecuTorchValue *> *> *_outputs;
 }
 
+- (instancetype)initWithFilePath:(NSString *)filePath
+                    dataFilePath:(NSString *)dataFilePath
+                        loadMode:(ExecuTorchModuleLoadMode)loadMode {
+  self = [super init];
+  if (self) {
+    _module = std::make_unique<Module>(
+      filePath.UTF8String,
+      dataFilePath.UTF8String,
+      static_cast<Module::LoadMode>(loadMode)
+    );
+    _inputs = [NSMutableDictionary new];
+    _outputs = [NSMutableDictionary new];
+  }
+  return self;
+}
+
 - (instancetype)initWithFilePath:(NSString *)filePath
                         loadMode:(ExecuTorchModuleLoadMode)loadMode {
   self = [super init];