From 25769288f62816d733004c9e8347c35dd0e4ce2a Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Wed, 27 Mar 2024 11:20:20 -0400
Subject: tests: New bfs_pcheck() macro to report xstrerror(errno)

---
 tests/tests.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'tests/tests.h')

diff --git a/tests/tests.h b/tests/tests.h
index 6629dcf..b644450 100644
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -51,4 +51,20 @@ static inline bool bfs_check(bool ret) {
 			: "Check failed: `%s`%s", \
 		str, __VA_ARGS__), false))
 
+/** Get a string description of the last error. */
+const char *bfs_errstr(void);
+
+/**
+ * Check a condition, logging the current error string on failure.
+ */
+#define bfs_pcheck(...) \
+	bfs_pcheck_(#__VA_ARGS__, __VA_ARGS__, "", "")
+
+#define bfs_pcheck_(str, cond, format, ...) \
+	((cond) ? true : (bfs_diag( \
+		sizeof(format) > 1 \
+			? "%.0s" format "%s%s: %s" \
+			: "Check failed: `%s`%s: %s", \
+		str, __VA_ARGS__, bfs_errstr()), false))
+
 #endif // BFS_TESTS_H
-- 
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