2 files changed, 21 insertions, 4 deletions

diff --git a/src/utils/dbg_log.h b/src/utils/dbg_log.h
index f9b1d8a..c30993a 100644
--- a/src/utils/dbg_log.h
+++ b/src/utils/dbg_log.h
@@ -1,6 +1,23 @@
-void (*nissy_log)(const char *, ...);
+#include <stdio.h>
 
-#define LOG(...) if (nissy_log != NULL) nissy_log(__VA_ARGS__);
+void (*nissy_log)(const char *);
+void write_wrapper(void (*)(const char *), const char *, ...);
+
+void
+write_wrapper(void (*write)(const char *), const char *str, ...)
+{
+        static const size_t len = 1000;
+        char message[len];
+        va_list args;
+
+        va_start(args, str);
+        sprintf(message, str, args);
+        va_end(args);
+
+        write(message);
+}
+
+#define LOG(...) if (nissy_log != NULL) write_wrapper(nissy_log, __VA_ARGS__);
 
 #ifdef DEBUG
 #define STATIC
diff --git a/src/utils/math.h b/src/utils/math.h
index a9d9b85..1ae4013 100644
--- a/src/utils/math.h
+++ b/src/utils/math.h
@@ -168,8 +168,8 @@ sumzerotodigits(int64_t d, size_t n, uint8_t b, uint8_t a[n])
         size_t i;
 
         if (!((n == 8 && b == 3 ) || (n == 12 && b == 2))) {
-                LOG("Won't compute 'digits' for n=%" PRIu8 "and b=%" PRIu8
-                    " (use n=8 b=3 or n=12 b=2)\n");
+                LOG("Won't compute 'digits' for n=%zu and b=%" PRIu8
+                    " (use n=8 b=3 or n=12 b=2)\n", n, b);
                 goto sumzerotodigits_error;
         }