JNI write

app/src/main/java/eu/faircode/email/Helper.java

@@ -2649,7 +2649,7 @@ public class Helper {
         }
 
         // CASA: External storage as well
-        if (!dir.exists() && !dir.mkdirs()) // TODO CASA
+        if (!dir.exists() && Log.jni_safe_mkdirs(dir))
             throw new IllegalArgumentException("Failed to create directory");
 
         return dir;
@@ -2745,8 +2745,7 @@ public class Helper {
 
     static void writeText(File file, String content) throws IOException {
         try (FileOutputStream out = new FileOutputStream(file)) {
-            if (content != null)
-                out.write(content.getBytes()); // TODO CASA
+            Log.write(out, content);
         }
     }
 

app/src/main/java/eu/faircode/email/Log.java

@@ -243,6 +243,10 @@ public class Log {
 
     public static native int jni_safe_log(int prio, String tag, String msg);
 
+    public static native boolean jni_safe_mkdirs(File file);
+
+    public static native void jni_safe_write(OutputStream os, byte[] data);
+
     public static native Process jni_safe_runtime_exec(Runtime runtime, String[] cmd);
 
     public static native long[] jni_safe_runtime_stats();
@@ -3813,9 +3817,9 @@ public class Log {
         return ssb;
     }
 
-    private static int write(OutputStream os, String text) throws IOException {
-        byte[] bytes = text.getBytes();
-        os.write(bytes); // TODO CASA
+    static int write(OutputStream os, String text) throws IOException {
+        byte[] bytes = (text == null ? new byte[0] : text.getBytes());
+        jni_safe_write(os, bytes);
         return bytes.length;
     }
 

app/src/main/jni/fairemail.cc

@@ -65,6 +65,24 @@ Java_eu_faircode_email_ThrowableWrapper_jni_1get_1safe_1stack_1trace_1string(
     return (jstring) env->CallStaticObjectMethod(cls, mid, ex);
 }
 
+extern "C"
+JNIEXPORT jboolean JNICALL
+Java_eu_faircode_email_Log_jni_1safe_1mkdirs(JNIEnv *env, jclass clazz,
+                                             jobject file) {
+    jclass cls = env->FindClass("java/io/File");
+    jmethodID mid = env->GetMethodID(cls, "mkdirs", "()Z");
+    return (jboolean) env->CallBooleanMethod(file, mid);
+}
+
+extern "C"
+JNIEXPORT void JNICALL
+Java_eu_faircode_email_Log_jni_1safe_1write(JNIEnv *env, jclass clazz,
+                                            jobject os, jbyteArray data) {
+    jclass cls = env->FindClass("java/io/OutputStream");
+    jmethodID mid = env->GetMethodID(cls, "write", "([B)V");
+    env->CallVoidMethod(os, mid, data);
+}
+
 extern "C"
 JNIEXPORT jobject JNICALL
 Java_eu_faircode_email_Log_jni_1safe_1runtime_1exec(JNIEnv *env, jclass clazz,
@@ -122,7 +140,8 @@ Java_eu_faircode_email_DB_jni_1safe_1support_1query(JNIEnv *env, jclass clazz,
 
 extern "C"
 JNIEXPORT jobject JNICALL
-Java_eu_faircode_email_DB_jni_1safe_1sqlite_1query(JNIEnv *env, jclass clazz, jobject db, jstring table, jobjectArray columns,
+Java_eu_faircode_email_DB_jni_1safe_1sqlite_1query(JNIEnv *env, jclass clazz, jobject db,
+                                                   jstring table, jobjectArray columns,
                                                    jstring selection, jobjectArray selection_args, jstring group_by,
                                                    jstring having, jstring order_by, jstring limit) {
     jclass cls = env->FindClass("android/database/sqlite/SQLiteDatabase");