add cluster support to gen-data.rb, show centroids on generated png

1 files changed, 6 insertions, 0 deletions

diff --git a/util.h b/util.h
index d13dfae..eeda5a7 100644
--- a/util.h
+++ b/util.h
@@ -7,6 +7,12 @@
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define UNUSED(a) ((void) (a))
 
+#define D(...) do { \
+  fprintf(stderr, "DEBUG: %s(): ", __func__); \
+  fprintf(stderr, __VA_ARGS__); \
+  fputs("\n", stderr); \
+} while (0)
+
 #define die(...) do { \
   fputs("FATAL: ", stderr); \
   fprintf(stderr, __VA_ARGS__); \