Initial import of libdpf.

Co-authored-by: Cursor <cursoragent@cursor.com>

thirdparty/hedley/test/sentinel.c

@@ -0,0 +1,36 @@
+#include "../hedley.h"
+
+#if HEDLEY_HAS_WARNING("-Wsentinel")
+#  pragma clang diagnostic warning "-Wsentinel"
+#elif defined(HEDLEY_INTEL_VERSION)
+#  pragma warning(disable:1881)
+#elif HEDLEY_PGI_VERSION_CHECK(20,7,0)
+#  pragma diag_remark 1546,1547
+#elif defined(HEDLEY_PGI_VERSION) || HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+#  pragma diag_remark 1546
+#elif defined(HEDLEY_GNUC_VERSION)
+#  pragma GCC diagnostic warning "-Wformat"
+#endif
+
+#if defined(_MSC_VER)
+  HEDLEY_DIAGNOSTIC_PUSH
+  #pragma warning(disable:4668)
+  #include <assert.h>
+  HEDLEY_DIAGNOSTIC_POP
+#else
+  #include <assert.h>
+#endif
+
+HEDLEY_SENTINEL(0)
+static int test_sentinel(void* ptr, ...) {
+  assert(ptr == HEDLEY_NULL);
+
+  return 42;
+}
+
+int main(void) {
+  test_sentinel(HEDLEY_NULL, 1, HEDLEY_NULL);
+  test_sentinel(HEDLEY_NULL, 1);
+
+  return 0;
+}