From a228788769d7e3c71154606609a13eafb03a5fc2 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Thu, 29 Feb 2024 13:16:14 -0500
Subject: diag: New bfs_diag() macro

---
 src/diag.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src/diag.h')

diff --git a/src/diag.h b/src/diag.h
index 791c065..4054c48 100644
--- a/src/diag.h
+++ b/src/diag.h
@@ -41,6 +41,19 @@ struct bfs_loc {
 #  define bfs_location() (&(const struct bfs_loc)BFS_LOC_INIT)
 #endif
 
+/**
+ * Print a low-level diagnostic message to standard error, formatted like
+ *
+ *     bfs: func@src/file.c:0: Message
+ */
+attr(printf(2, 3))
+void bfs_diagf(const struct bfs_loc *loc, const char *format, ...);
+
+/**
+ * Unconditional diagnostic message.
+ */
+#define bfs_diag(...) bfs_diagf(bfs_location(), __VA_ARGS__)
+
 /**
  * Print a message to standard error and abort.
  */
-- 
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