3 files changed, 58 insertions, 0 deletions

diff --git a/src/common/fs/fs_android.cpp b/src/common/fs/fs_android.cpp
index 298a79bac..1dd826a4a 100644
--- a/src/common/fs/fs_android.cpp
+++ b/src/common/fs/fs_android.cpp
@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/fs/fs_android.h"
+#include "common/string_util.h"
 
 namespace Common::FS::Android {
 
@@ -28,28 +29,35 @@ void RegisterCallbacks(JNIEnv* env, jclass clazz) {
     env->GetJavaVM(&g_jvm);
     native_library = clazz;
 
+#define FH(FunctionName, JMethodID, Caller, JMethodName, Signature)                                \
+    F(JMethodID, JMethodName, Signature)
 #define FR(FunctionName, ReturnValue, JMethodID, Caller, JMethodName, Signature)                   \
     F(JMethodID, JMethodName, Signature)
 #define FS(FunctionName, ReturnValue, Parameters, JMethodID, JMethodName, Signature)               \
     F(JMethodID, JMethodName, Signature)
 #define F(JMethodID, JMethodName, Signature)                                                       \
     JMethodID = env->GetStaticMethodID(native_library, JMethodName, Signature);
+    ANDROID_SINGLE_PATH_HELPER_FUNCTIONS(FH)
     ANDROID_SINGLE_PATH_DETERMINE_FUNCTIONS(FR)
     ANDROID_STORAGE_FUNCTIONS(FS)
 #undef F
 #undef FS
 #undef FR
+#undef FH
 }
 
 void UnRegisterCallbacks() {
+#define FH(FunctionName, JMethodID, Caller, JMethodName, Signature) F(JMethodID)
 #define FR(FunctionName, ReturnValue, JMethodID, Caller, JMethodName, Signature) F(JMethodID)
 #define FS(FunctionName, ReturnValue, Parameters, JMethodID, JMethodName, Signature) F(JMethodID)
 #define F(JMethodID) JMethodID = nullptr;
+    ANDROID_SINGLE_PATH_HELPER_FUNCTIONS(FH)
     ANDROID_SINGLE_PATH_DETERMINE_FUNCTIONS(FR)
     ANDROID_STORAGE_FUNCTIONS(FS)
 #undef F
 #undef FS
 #undef FR
+#undef FH
 }
 
 bool IsContentUri(const std::string& path) {
@@ -95,4 +103,29 @@ ANDROID_SINGLE_PATH_DETERMINE_FUNCTIONS(FR)
 #undef F
 #undef FR
 
+#define FH(FunctionName, JMethodID, Caller, JMethodName, Signature)                                \
+    F(FunctionName, JMethodID, Caller)
+#define F(FunctionName, JMethodID, Caller)                                                         \
+    std::string FunctionName(const std::string& filepath) {                                        \
+        if (JMethodID == nullptr) {                                                                \
+            return 0;                                                                              \
+        }                                                                                          \
+        auto env = GetEnvForThread();                                                              \
+        jstring j_filepath = env->NewStringUTF(filepath.c_str());                                  \
+        jstring j_return =                                                                         \
+            static_cast<jstring>(env->Caller(native_library, JMethodID, j_filepath));              \
+        if (!j_return) {                                                                           \
+            return {};                                                                             \
+        }                                                                                          \
+        const jchar* jchars = env->GetStringChars(j_return, nullptr);                              \
+        const jsize length = env->GetStringLength(j_return);                                       \
+        const std::u16string_view string_view(reinterpret_cast<const char16_t*>(jchars), length);  \
+        const std::string converted_string = Common::UTF16ToUTF8(string_view);                     \
+        env->ReleaseStringChars(j_return, jchars);                                                 \
+        return converted_string;                                                                   \
+    }
+ANDROID_SINGLE_PATH_HELPER_FUNCTIONS(FH)
+#undef F
+#undef FH
+
 } // namespace Common::FS::Android
diff --git a/src/common/fs/fs_android.h b/src/common/fs/fs_android.h
index b441c2a12..2c9234313 100644
--- a/src/common/fs/fs_android.h
+++ b/src/common/fs/fs_android.h
@@ -17,19 +17,28 @@
       "(Ljava/lang/String;)Z")                                                                     \
     V(Exists, bool, file_exists, CallStaticBooleanMethod, "exists", "(Ljava/lang/String;)Z")
 
+#define ANDROID_SINGLE_PATH_HELPER_FUNCTIONS(V)                                                    \
+    V(GetParentDirectory, get_parent_directory, CallStaticObjectMethod, "getParentDirectory",      \
+      "(Ljava/lang/String;)Ljava/lang/String;")                                                    \
+    V(GetFilename, get_filename, CallStaticObjectMethod, "getFilename",                            \
+      "(Ljava/lang/String;)Ljava/lang/String;")
+
 namespace Common::FS::Android {
 
 static JavaVM* g_jvm = nullptr;
 static jclass native_library = nullptr;
 
+#define FH(FunctionName, JMethodID, Caller, JMethodName, Signature) F(JMethodID)
 #define FR(FunctionName, ReturnValue, JMethodID, Caller, JMethodName, Signature) F(JMethodID)
 #define FS(FunctionName, ReturnValue, Parameters, JMethodID, JMethodName, Signature) F(JMethodID)
 #define F(JMethodID) static jmethodID JMethodID = nullptr;
+ANDROID_SINGLE_PATH_HELPER_FUNCTIONS(FH)
 ANDROID_SINGLE_PATH_DETERMINE_FUNCTIONS(FR)
 ANDROID_STORAGE_FUNCTIONS(FS)
 #undef F
 #undef FS
 #undef FR
+#undef FH
 
 enum class OpenMode {
     Read,
@@ -62,4 +71,10 @@ ANDROID_SINGLE_PATH_DETERMINE_FUNCTIONS(FR)
 #undef F
 #undef FR
 
+#define FH(FunctionName, JMethodID, Caller, JMethodName, Signature) F(FunctionName)
+#define F(FunctionName) std::string FunctionName(const std::string& filepath);
+ANDROID_SINGLE_PATH_HELPER_FUNCTIONS(FH)
+#undef F
+#undef FH
+
 } // namespace Common::FS::Android
diff --git a/src/common/fs/path_util.cpp b/src/common/fs/path_util.cpp
index 0c4c88cde..c3a81f9a9 100644
--- a/src/common/fs/path_util.cpp
+++ b/src/common/fs/path_util.cpp
@@ -401,6 +401,16 @@ std::string SanitizePath(std::string_view path_, DirectorySeparator directory_se
 }
 
 std::string_view GetParentPath(std::string_view path) {
+    if (path.empty()) {
+        return path;
+    }
+
+#ifdef ANDROID
+    if (path[0] != '/') {
+        std::string path_string{path};
+        return FS::Android::GetParentDirectory(path_string);
+    }
+#endif
     const auto name_bck_index = path.rfind('\\');
     const auto name_fwd_index = path.rfind('/');
     std::size_t name_index;