Initial import of libdpf.

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

thirdparty/hedley/test/non-null.c

@@ -0,0 +1,35 @@
+#include "../hedley.h"
+
+#if defined(_MSC_VER)
+  HEDLEY_DIAGNOSTIC_PUSH
+  #pragma warning(disable:4255 4668)
+  #include <stdlib.h>
+  HEDLEY_DIAGNOSTIC_POP
+#else
+  #include <stdlib.h>
+#endif
+
+#if HEDLEY_PGI_VERSION_CHECK(20,7,0)
+#  pragma diag_remark 1622,1623
+#elif defined(HEDLEY_PGI_VERSION)
+#  pragma diag_remark 1622
+#elif HEDLEY_SUNPRO_VERSION_CHECK(5,15,0) && defined(__cplusplus)
+#  pragma error_messages(off,nonnullarg)
+#elif HEDLEY_GCC_HAS_WARNING("-Wnonnull",3,3,0)
+#  pragma GCC diagnostic warning "-Wnonnull"
+#elif HEDLEY_INTEL_VERSION_CHECK(19,0,0)
+#  pragma warning(disable:2193)
+#elif HEDLEY_MCST_LCC_VERSION_CHECK(1,25,10)
+#  pragma diag_suppress 1622
+#endif
+
+HEDLEY_NON_NULL(1)
+static const char* non_null(const char* msg) {
+  return msg;
+}
+
+int main (void) {
+  non_null(HEDLEY_STATIC_CAST(const char*, HEDLEY_NULL));
+
+  return 0;
+}