From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Tue, 24 Aug 2021 12:02:44 +0000 (+0300)
Subject: lib: Add test-macros
X-Git-Tag: 2.3.17~171
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=07d66366ab311d74d5ea1514bb8b3f6cbfc758b4;p=thirdparty%2Fdovecot%2Fcore.git

lib: Add test-macros
---

diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
index 8884f37127..2d2fcdf1ef 100644
--- a/src/lib/Makefile.am
+++ b/src/lib/Makefile.am
@@ -423,6 +423,7 @@ test_lib_SOURCES = \
 	test-lib-signals.c \
 	test-llist.c \
 	test-log-throttle.c \
+	test-macros.c \
 	test-malloc-overflow.c \
 	test-memarea.c \
 	test-mempool.c \
diff --git a/src/lib/test-lib.inc b/src/lib/test-lib.inc
index 07ad576565..0591f86dc3 100644
--- a/src/lib/test-lib.inc
+++ b/src/lib/test-lib.inc
@@ -64,6 +64,7 @@ TEST(test_json_tree)
 TEST(test_lib_signals)
 TEST(test_llist)
 TEST(test_log_throttle)
+TEST(test_macros)
 TEST(test_malloc_overflow)
 FATAL(fatal_malloc_overflow)
 TEST(test_memarea)
diff --git a/src/lib/test-macros.c b/src/lib/test-macros.c
new file mode 100644
index 0000000000..4b9e1b1514
--- /dev/null
+++ b/src/lib/test-macros.c
@@ -0,0 +1,63 @@
+/* Copyright (c) 2021 Dovecot authors, see the included COPYING file */
+
+#include "test-lib.h"
+
+struct parent {
+	unsigned int a;
+};
+struct child {
+	unsigned int b;
+	struct parent p;
+};
+
+static void test_container_of(void)
+{
+	struct child child;
+	struct parent *parent = &child.p;
+
+	test_begin("container_of()");
+	struct child *ptr_child = container_of(parent, struct child, p);
+	test_assert(ptr_child == &child);
+	test_end();
+}
+
+static void test_pointer_cast(void)
+{
+#define TEST_POINTER_CAST(type, prefix, value) \
+	type prefix ## _num = value; \
+	void *prefix ## _ptr = POINTER_CAST(prefix ## _num); \
+	test_assert(POINTER_CAST_TO(prefix ## _ptr, type) == prefix ## _num);
+	test_begin("POINTER_CAST");
+
+	TEST_POINTER_CAST(unsigned int, uint, 0x87654321);
+	TEST_POINTER_CAST(uint32_t, uint32, 0xf00dabcd);
+	TEST_POINTER_CAST(uint16_t, uint16, 0x9876);
+	TEST_POINTER_CAST(uint8_t, uint8, 0xf8);
+#if SIZEOF_VOID_P == 8
+	TEST_POINTER_CAST(unsigned long, ulong, 0xfedcba9876543210);
+	TEST_POINTER_CAST(size_t, size, 0xfedcba9876543210);
+#else
+	TEST_POINTER_CAST(unsigned long, ulong, 0xfedcba98);
+	TEST_POINTER_CAST(size_t, size, 0xfedcba98);
+#endif
+
+	test_end();
+}
+
+static void test_ptr_offset(void)
+{
+	uint32_t foo[] = { 1, 2, 3 };
+	const uint32_t foo2[] = { 1, 2, 3 };
+
+	test_begin("PTR_OFFSET");
+	test_assert(PTR_OFFSET(foo, 4) == &foo[1]);
+	test_assert(CONST_PTR_OFFSET(foo2, 8) == &foo2[2]);
+	test_end();
+}
+
+void test_macros(void)
+{
+	test_container_of();
+	test_pointer_cast();
+	test_ptr_offset();
+}