1 files changed, 13 insertions, 1 deletions
diff --git a/lib/lz4.c b/lib/lz4.c
index 93de1e5..87ec6ab 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -280,10 +280,22 @@ static const int LZ4_minLength = (MFLIMIT+1);
 
 
 /*-************************************
-*  Common Utils
+*  Error detection
 **************************************/
 #define LZ4_STATIC_ASSERT(c)    { enum { LZ4_static_assert = 1/(int)(!!(c)) }; }   /* use only *after* variable declarations */
 
+#if defined(LZ4_DEBUG) && (LZ4_DEBUG>=2)
+#  include <stdio.h>
+#  define DEBUGLOG(l, ...) {                          \
+                if (l<=LZ4_DEBUG) {                   \
+                    fprintf(stderr, __FILE__ ": ");   \
+                    fprintf(stderr, __VA_ARGS__);     \
+                    fprintf(stderr, " \n");           \
+            }   }
+#else
+#  define DEBUGLOG(l, ...)      {}    /* disabled */
+#endif
+
 
 /*-************************************
 *  Common functions