diag: Unify diagnostic formatting

This adds a bfs: prefix to error/warning messages for consistency with
other command line tools, and leaves only the "error:"/"warning:" part
colored like GCC.  It also uniformly adds full stops after messages.

1 files changed, 6 insertions, 0 deletions

diff --git a/color.h b/color.h
index 419180c..a68378e 100644
--- a/color.h
+++ b/color.h
@@ -18,6 +18,7 @@
 #define BFS_COLOR_H
 
 #include "bftw.h"
+#include <stdarg.h>
 #include <stdbool.h>
 #include <stdio.h>
 
@@ -108,4 +109,9 @@ int cfclose(CFILE *cfile);
  */
 int cfprintf(CFILE *cfile, const char *format, ...);
 
+/**
+ * cfprintf() variant that takes a va_list.
+ */
+int cvfprintf(CFILE *cfile, const char *format, va_list args);
+
 #endif // BFS_COLOR_H