[test] Add self-tests for crc32_le()

Add self-tests for crc32_le() using test vectors generated with Perl's Digest::CRC. Signed-off-by: Michael Brown <mcb30@ipxe.org>
ipxe · May 7, 2012 · e844297 · e844297
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diff --git a/src/tests/crc32_test.c b/src/tests/crc32_test.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * CRC32 tests
+ *
+ *
+ * Test vectors generated using Perl's Digest::CRC:
+ *
+ *    use Digest::CRC qw ( crc );
+ *
+ *    printf "%#08x", crc ( $data, 32, $seed, 0, 1, 0x04c11db7, 1 );
+ *
+ */
+
+/* Forcibly enable assertions */
+#undef NDEBUG
+
+#include <stdint.h>
+#include <ipxe/crc32.h>
+#include <ipxe/test.h>
+
+/** Define inline data */
+#define DATA(...) { __VA_ARGS__ }
+
+/** A CRC32 test */
+struct crc32_test {
+	/** Test data */
+	const void *data;
+	/** Length of test data */
+	size_t len;
+	/** Seed */
+	uint32_t seed;
+	/** Expected CRC32 */
+	uint32_t crc32;
+};
+
+/**
+ * Define a CRC32 test
+ *
+ * @v name		Test name
+ * @v DATA		Test data
+ * @v SEED		Seed
+ * @v CRC32		Expected CRC32
+ * @ret test		CRC32 test
+ */
+#define CRC32_TEST( name, DATA, SEED, CRC32 )				\
+	static const uint8_t name ## _data[] = DATA;			\
+	static struct crc32_test name = {				\
+		.data = name ## _data,					\
+		.len = sizeof ( name ## _data ),			\
+		.seed = SEED,						\
+		.crc32 = CRC32,						\
+	};
+
+/**
+ * Report a CRC32 test result
+ *
+ * @v test		CRC32 test
+ */
+#define crc32_ok( test ) do {						\
+	uint32_t crc32;							\
+	crc32 = crc32_le ( (test)->seed, (test)->data, (test)->len );	\
+	ok ( crc32 == (test)->crc32 );					\
+	} while ( 0 )
+
+/* CRC32 tests */
+CRC32_TEST ( empty_test,
+	     DATA ( ),
+	     0x12345678UL, 0x12345678UL );
+CRC32_TEST ( hw_test,
+	     DATA ( 'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd' ),
+	     0xffffffffUL, 0xf2b5ee7aUL );
+CRC32_TEST ( hw_split_part1_test,
+	     DATA ( 'h', 'e', 'l', 'l', 'o' ),
+	     0xffffffffUL, 0xc9ef5979UL );
+CRC32_TEST ( hw_split_part2_test,
+	     DATA ( ' ', 'w', 'o', 'r', 'l', 'd' ),
+	     0xc9ef5979UL, 0xf2b5ee7aUL );
+
+/**
+ * Perform CRC32 self-tests
+ *
+ */
+static void crc32_test_exec ( void ) {
+
+	crc32_ok ( &empty_test );
+	crc32_ok ( &hw_test );
+	crc32_ok ( &hw_split_part1_test );
+	crc32_ok ( &hw_split_part2_test );
+}
+
+/** CRC32 self-test */
+struct self_test crc32_test __self_test = {
+	.name = "crc32",
+	.exec = crc32_test_exec,
+};
diff --git a/src/tests/tests.c b/src/tests/tests.c
@@ -29,6 +29,7 @@ REQUIRE_OBJECT ( list_test );
 REQUIRE_OBJECT ( byteswap_test );
 REQUIRE_OBJECT ( settings_test );
 REQUIRE_OBJECT ( time_test );
+REQUIRE_OBJECT ( crc32_test );
 REQUIRE_OBJECT ( md5_test );
 REQUIRE_OBJECT ( sha1_test );
 REQUIRE_OBJECT ( sha256_test );