[zlib] Add support for zlib archive images

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/tests/tests.c

@@ -73,3 +73,4 @@ REQUIRE_OBJECT ( bitops_test );
 REQUIRE_OBJECT ( der_test );
 REQUIRE_OBJECT ( pem_test );
 REQUIRE_OBJECT ( ntlm_test );
+REQUIRE_OBJECT ( zlib_test );

src/tests/zlib_test.c

@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2021 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 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.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+/** @file
+ *
+ * zlib image tests
+ *
+ */
+
+/* Forcibly enable assertions */
+#undef NDEBUG
+
+#include <stdint.h>
+#include <ipxe/image.h>
+#include <ipxe/zlib.h>
+#include <ipxe/test.h>
+
+/** A zlib test */
+struct zlib_test {
+	/** Compressed filename */
+	const char *compressed_name;
+	/** Compressed data */
+	const void *compressed;
+	/** Length of compressed data */
+	size_t compressed_len;
+	/** Expected uncompressed name */
+	const char *expected_name;
+	/** Expected uncompressed data */
+	const void *expected;
+	/** Length of expected uncompressed data */
+	size_t expected_len;
+};
+
+/** Define inline data */
+#define DATA(...) { __VA_ARGS__ }
+
+/** Define a zlib test */
+#define ZLIB( name, COMPRESSED, EXPECTED )				\
+	static const uint8_t name ## _compressed[] = COMPRESSED;	\
+	static const uint8_t name ## _expected[] = EXPECTED;		\
+	static struct zlib_test name = {				\
+		.compressed_name = #name ".z",				\
+		.compressed = name ## _compressed,			\
+		.compressed_len = sizeof ( name ## _compressed ),	\
+		.expected_name = #name,					\
+		.expected = name ## _expected,				\
+		.expected_len = sizeof ( name ## _expected ),		\
+	};
+
+/** "Hello world" */
+ZLIB ( hello_world,
+       DATA ( 0x78, 0x9c, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf,
+	      0x2f, 0xca, 0x49, 0x01, 0x00, 0x18, 0xab, 0x04, 0x3d ),
+       DATA ( 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c,
+	      0x64 ) );
+
+/**
+ * Report zlib test result
+ *
+ * @v test		zlib test
+ * @v file		Test code file
+ * @v line		Test code line
+ */
+static void zlib_okx ( struct zlib_test *test, const char *file,
+		       unsigned int line ) {
+	struct image *image;
+	struct image *extracted;
+
+	/* Construct compressed image */
+	image = image_memory ( test->compressed_name,
+			       virt_to_user ( test->compressed ),
+			       test->compressed_len );
+	okx ( image != NULL, file, line );
+	okx ( image->len == test->compressed_len, file, line );
+
+	/* Check type detection */
+	okx ( image->type == &zlib_image_type, file, line );
+
+	/* Extract archive image */
+	okx ( image_extract ( image, NULL, &extracted ) == 0, file, line );
+
+	/* Verify extracted image content */
+	okx ( extracted->len == test->expected_len, file, line );
+	okx ( memcmp_user ( extracted->data, 0,
+			    virt_to_user ( test->expected ), 0,
+			    test->expected_len ) == 0, file, line );
+
+	/* Verify extracted image name */
+	okx ( strcmp ( extracted->name, test->expected_name ) == 0,
+	      file, line );
+
+	/* Unregister images */
+	unregister_image ( extracted );
+	unregister_image ( image );
+}
+#define zlib_ok( test ) zlib_okx ( test, __FILE__, __LINE__ )
+
+/**
+ * Perform zlib self-test
+ *
+ */
+static void zlib_test_exec ( void ) {
+
+	zlib_ok ( &hello_world );
+}
+
+/** zlib self-test */
+struct self_test zlib_test __self_test = {
+	.name = "zlib",
+	.exec = zlib_test_exec,
+};