tests/src/utils/test-log.c: add example for aubio_log_set_function

diff --git a/tests/src/utils/test-log.c b/tests/src/utils/test-log.c
new file mode 100644 (file)
index 0000000..9839066
--- /dev/null
+++ b/tests/src/utils/test-log.c
@@ -0,0 +1,56 @@
+#include <aubio.h>
+#include <stdio.h>
+#include "aubio_priv.h"
+
+const char_t *hdr = "CUSTOM HEADER: ";
+const char_t *hdr2 = "OTHER HEADER: ";
+
+/* an example of logging function that adds a custom header and prints
+ * aubio debug messages on stdout instead of stderr */
+void logging(int level, const char_t *message, void *data) {
+  FILE *out;
+  fprintf(stdout, "using custom logging function\n");
+  if (level == AUBIO_LOG_ERR) {
+    out = stderr;
+  } else {
+    out = stdout;
+  }
+  if ((level >= 0) && (data != NULL)) {
+    fprintf(out, "%s", (const char_t *)data);
+  }
+  fprintf(out, "%s", message);
+}
+
+int main (void)
+{
+  fprintf(stdout, "### testing normal logging\n");
+  AUBIO_ERR("testing normal AUBIO_LOG_ERR\n");
+  AUBIO_WRN("testing normal AUBIO_LOG_WRN\n");
+  AUBIO_MSG("testing normal AUBIO_LOG_MSG\n");
+  AUBIO_DBG("testing normal AUBIO_LOG_DBG\n");
+
+  fprintf(stdout, "### testing with one custom function\n");
+  aubio_log_set_function(logging, (void *)hdr);
+  AUBIO_ERR("testing recustom AUBIO_LOG_ERR\n");
+  AUBIO_WRN("testing recustom AUBIO_LOG_WRN\n");
+  AUBIO_MSG("testing recustom AUBIO_LOG_MSG\n");
+  AUBIO_DBG("testing recustom AUBIO_LOG_DBG\n");
+
+  fprintf(stdout, "### testing resetted logging\n");
+  aubio_log_reset();
+  AUBIO_ERR("testing uncustom AUBIO_LOG_ERR\n");
+  AUBIO_WRN("testing uncustom AUBIO_LOG_WRN\n");
+  AUBIO_MSG("testing uncustom AUBIO_LOG_MSG\n");
+  AUBIO_DBG("testing uncustom AUBIO_LOG_DBG\n");
+
+  fprintf(stdout, "### testing per level customization\n");
+  aubio_log_set_level_function(AUBIO_LOG_ERR, logging, (void *)hdr2);
+  aubio_log_set_level_function(AUBIO_LOG_WRN, logging, NULL);
+  aubio_log_set_level_function(AUBIO_LOG_MSG, logging, (void *)hdr);
+  AUBIO_ERR("testing custom AUBIO_LOG_ERR\n");
+  AUBIO_WRN("testing custom AUBIO_LOG_WRN with data=NULL\n");
+  AUBIO_MSG("testing custom AUBIO_LOG_MSG\n");
+  AUBIO_DBG("testing uncustomized AUBIO_LOG_DBG\n");
+
+  return 0;
+}