From d4c257d1f98eca0370a67dadc3a8575e3b6e424b Mon Sep 17 00:00:00 2001
From: devojony <61173062+devojony@users.noreply.github.com>
Date: Mon, 22 Jul 2024 13:20:06 +0800
Subject: [PATCH] fix: Android example cannot be generated continuously

When generation ends `completion_loop()` should return a NULL, not the empty string
---
 examples/llama.android/llama/src/main/cpp/llama-android.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/llama.android/llama/src/main/cpp/llama-android.cpp b/examples/llama.android/llama/src/main/cpp/llama-android.cpp
index 92a6b16b1..2aafe2316 100644
--- a/examples/llama.android/llama/src/main/cpp/llama-android.cpp
+++ b/examples/llama.android/llama/src/main/cpp/llama-android.cpp
@@ -409,7 +409,7 @@ Java_android_llama_cpp_LLamaAndroid_completion_1loop(
 
     const auto n_cur = env->CallIntMethod(intvar_ncur, la_int_var_value);
     if (llama_token_is_eog(model, new_token_id) || n_cur == n_len) {
-        return env->NewStringUTF("");
+        return nullptr;
     }
 
     auto new_token_chars = llama_token_to_piece(context, new_token_id);