Add dlt_user_is_logLevel_enabled API

This function allows an application developer to check if the DLT
LogLevel is enabled before starting any log string creation. It can be
used in application specific logging wrapper functions.

Signed-off-by: Christoph Lipka <clipka@jp.adit-jv.com>

Change-Id: I4c269b12bfdeae29a4e795385cdbc54a579ba621

2 files changed, 51 insertions, 1 deletions

diff --git a/src/lib/dlt_user.c b/src/lib/dlt_user.c
index ef0f36f..ca7a56d 100644
--- a/src/lib/dlt_user.c
+++ b/src/lib/dlt_user.c
@@ -1371,7 +1371,7 @@ DltReturnValue dlt_user_log_write_start_id(DltContext *handle, DltContextData *l
     log->size = 0;
 
     /* check log levels */
-    if (handle->log_level_ptr != NULL && (loglevel <= (int) *(handle->log_level_ptr)) && (loglevel != DLT_LOG_OFF))
+    if (dlt_user_is_logLevel_enabled(handle, loglevel) == DLT_RETURN_TRUE)
     {
         /* In non-verbose mode, insert message id */
         if (dlt_user.verbose_mode == 0)
diff --git a/src/tests/dlt-test-user.c b/src/tests/dlt-test-user.c
index 16479a2..9a57573 100644
--- a/src/tests/dlt-test-user.c
+++ b/src/tests/dlt-test-user.c
@@ -78,6 +78,18 @@
 
 #define DLT_TEST_NUM_CONTEXT 9
 
+/* LogLevel string representation */
+static const char *loglevelstr[DLT_LOG_MAX] =
+{
+        "DLT_LOG_OFF",
+        "DLT_LOG_FATAL",
+        "DLT_LOG_ERROR",
+        "DLT_LOG_WARN",
+        "DLT_LOG_INFO",
+        "DLT_LOG_DEBUG",
+        "DLT_LOG_VERBOSE"
+};
+
 /* Test functions... */
 
 /* for macro interface */
@@ -478,6 +490,7 @@ int test5m(void)
 {
     char buffer[32];
     int num;
+    int i;
 
     void *ptr = malloc(sizeof(int));
 
@@ -510,6 +523,26 @@ int test5m(void)
 
     DLT_LOG(context_macro_test[4],DLT_LOG_INFO,DLT_STRING("Next line: DLT_LOG_PTR"));
     DLT_LOG(context_macro_test[4],DLT_LOG_INFO,DLT_PTR(ptr));
+
+    DLT_LOG(context_macro_test[4],DLT_LOG_INFO,DLT_STRING("Next lines: DLT_IS_LOG_LEVEL_ENABLED"));
+    for (i = DLT_LOG_FATAL; i < DLT_LOG_MAX; i++)
+    {
+        if (DLT_IS_LOG_LEVEL_ENABLED(context_macro_test[4],i))
+        {
+            DLT_LOG(context_info,
+                    DLT_LOG_INFO,
+                    DLT_STRING("Loglevel is enabled: "),
+                    DLT_STRING(loglevelstr[i]));
+        }
+        else
+        {
+            DLT_LOG(context_info,
+                    DLT_LOG_INFO,
+                    DLT_STRING("Loglevel is disabled: "),
+                    DLT_STRING(loglevelstr[i]));
+        }
+    }
+
     /* wait 2 second before next test */
     sleep(2);
     DLT_LOG(context_info,DLT_LOG_INFO,DLT_STRING("Test5: (Macro IF) finished"));
@@ -990,6 +1023,8 @@ int test5f(void)
 {
     char buffer[32];
     int num;
+    int i;
+    char log[DLT_USER_BUF_MAX_SIZE];
 
     for(num=0;num<32;num++)
     {
@@ -1018,6 +1053,21 @@ int test5f(void)
     dlt_log_string(&(context_function_test[4]),DLT_LOG_INFO,"Next line: dlt_log_string_uint()");
     dlt_log_string_uint(&(context_function_test[4]), DLT_LOG_INFO,"String output: ", 42);
 
+    dlt_log_string(&(context_function_test[4]),DLT_LOG_INFO, "Next lines: dlt_user_is_logLevel_enabled");
+    for (i = DLT_LOG_FATAL; i < DLT_LOG_MAX; i++)
+    {
+        if (dlt_user_is_logLevel_enabled(&(context_function_test[4]),i) == DLT_RETURN_TRUE)
+        {
+            snprintf(log, DLT_USER_BUF_MAX_SIZE, "Loglevel is enabled: %s", loglevelstr[i]);
+            dlt_log_string(&(context_function_test[4]),DLT_LOG_INFO, log);
+        }
+        else
+        {
+            snprintf(log, DLT_USER_BUF_MAX_SIZE, "Loglevel is disabled: %s", loglevelstr[i]);
+            dlt_log_string(&(context_function_test[4]),DLT_LOG_INFO, log);
+        }
+    }
+
     /* wait 2 second before next test */
     sleep(2);
     dlt_log_string(&context_info,DLT_LOG_INFO,"Test5: (Function IF) finished");