Added binding to utf16 truncate

Author: SessionHero01

library/src/main/cpp/util.cpp

@@ -323,3 +323,18 @@ Java_network_loki_messenger_libsession_1util_Config_free(JNIEnv *env, jobject th
         delete config;
     }
 }
+
+extern "C"
+JNIEXPORT jint JNICALL
+Java_network_loki_messenger_libsession_1util_util_Util_lengthForCodepoints(JNIEnv *env,
+                                                                           jobject thiz,
+                                                                           jstring str,
+                                                                           jint max_codepoints) {
+    return jni_utils::run_catching_cxx_exception_or_throws<jint>(env, [=]() {
+        jni_utils::JavaCharsRef str_ref(env, str);
+        return session::utf16_len_for_codepoints(
+                { reinterpret_cast<const char16_t *>(str_ref.chars()), str_ref.size() },
+                max_codepoints
+        );
+    });
+}

library/src/main/java/network/loki/messenger/libsession_util/util/ConfigPush.kt

@@ -0,0 +1,3 @@
+package network.loki.messenger.libsession_util.util
+
+data class ConfigPush(val messages: List<Bytes>, val seqNo: Long, val obsoleteHashes: List<String>)

library/src/main/java/network/loki/messenger/libsession_util/util/KeyPair.kt

@@ -0,0 +1,9 @@
+package network.loki.messenger.libsession_util.util
+
+import androidx.annotation.Keep
+
+data class KeyPair(val pubKey: Bytes, val secretKey: Bytes) {
+    @Keep
+    constructor(pubKey: ByteArray, secretKey: ByteArray)
+        : this(Bytes(pubKey), Bytes(secretKey))
+}

…/messenger/libsession_util/util/Utils.kt …essenger/libsession_util/util/UserPic.ktlibrary/src/main/java/network/loki/messenger/libsession_util/util/Utils.kt renamed to library/src/main/java/network/loki/messenger/libsession_util/util/UserPic.kt library/src/main/java/network/loki/messenger/libsession_util/util/Utils.kt renamed to library/src/main/java/network/loki/messenger/libsession_util/util/UserPic.kt

@@ -1,7 +1,5 @@
 package network.loki.messenger.libsession_util.util
 
-data class ConfigPush(val messages: List<Bytes>, val seqNo: Long, val obsoleteHashes: List<String>)
-
 data class UserPic(val url: String, val key: Bytes) {
     constructor(url: String, key: ByteArray)
         :this(url, Bytes(key))
@@ -13,9 +11,4 @@ data class UserPic(val url: String, val key: Bytes) {
     // Convenience method to get the key as a ByteArray from native side
     val keyAsByteArray: ByteArray
         get() = key.data
-}
-
-data class KeyPair(val pubKey: Bytes, val secretKey: Bytes) {
-    constructor(pubKey: ByteArray, secretKey: ByteArray)
-        : this(Bytes(pubKey), Bytes(secretKey))
-}
+}

library/src/main/java/network/loki/messenger/libsession_util/util/Util.kt

@@ -0,0 +1,10 @@
+package network.loki.messenger.libsession_util.util
+
+import network.loki.messenger.libsession_util.LibSessionUtilCApi
+
+object Util : LibSessionUtilCApi() {
+    private external fun lengthForCodepoints(str: String, maxCodepoints: Int): Int
+
+    fun truncateCodepoints(str: String, maxCodepoints: Int): String =
+        str.take(lengthForCodepoints(str, maxCodepoints))
+}