From: Phil Sutter <phil@nwl.cc>
Date: Wed, 22 Oct 2025 13:26:36 +0000 (+0200)
Subject: utils: Introduce expr_print_debug()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=858f5614b737067d21ae646f45ddc971a9a87909;p=thirdparty%2Fnftables.git

utils: Introduce expr_print_debug()

A simple function to call in random places when debugging
expression-related code.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---

diff --git a/include/utils.h b/include/utils.h
index 6a0e4946..1c227f68 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -27,6 +27,15 @@
 #define pr_gmp_debug(fmt, arg...) ({ if (false) {}; 0; })
 #endif
 
+#define expr_print_debug(expr)					\
+{								\
+	struct output_ctx octx = { .output_fp = stdout };	\
+	printf("%s:%d: ", __FILE__, __LINE__);			\
+	printf("'" #expr "' type %s: ", expr_name(expr));	\
+	expr_print((expr), &octx);				\
+	printf("\n");						\
+}
+
 #define __fmtstring(x, y)	__attribute__((format(printf, x, y)))
 
 #define __must_check		__attribute__((warn_unused_result))