Debug: Prefer runtime to compile-time check for logging

This is more convenient for both the developer and the user, especially
when it comes to providing logs in a bug report. As for the loss in
terms of performance, it is minimal, and this is normally not an issue
where these functions are used.

2 files changed, 22 insertions, 0 deletions

diff --git a/tumbler/tumbler-util.c b/tumbler/tumbler-util.c
index 9d6fad0..c7be630 100644
--- a/tumbler/tumbler-util.c
+++ b/tumbler/tumbler-util.c
@@ -39,6 +39,26 @@
 #define TUMBLER_STAT_BLKSIZE 512.
 
 
+
+/* that's what `! g_log_writer_default_would_drop (G_LOG_LEVEL_DEBUG, log_domain)` leads to:
+ * it is defined only from GLib 2.68, and it might be better to keep this anyway */
+gboolean
+tumbler_util_is_debug_logging_enabled (const gchar *log_domain)
+{
+  const gchar *domains;
+
+  domains = g_getenv ("G_MESSAGES_DEBUG");
+  if (domains == NULL)
+    return FALSE;
+
+  if (strcmp (domains, "all") == 0 || (log_domain != NULL && strstr (domains, log_domain)))
+    return TRUE;
+
+  return FALSE;
+}
+
+
+
 gchar **
 tumbler_util_get_supported_uri_schemes (void)
 {
diff --git a/tumbler/tumbler-util.h b/tumbler/tumbler-util.h
index be030cc..037bcf3 100644
--- a/tumbler/tumbler-util.h
+++ b/tumbler/tumbler-util.h
@@ -28,6 +28,8 @@
 
 G_BEGIN_DECLS
 
+gboolean tumbler_util_is_debug_logging_enabled (const gchar *log_domain);
+
 gchar **tumbler_util_get_supported_uri_schemes (void) G_GNUC_MALLOC;
 
 GKeyFile *tumbler_util_get_settings (void) G_GNUC_MALLOC;