Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/tests/test_stream_flags.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       test_stream_flags.c
+/// \brief      Tests Stream Header and Stream Footer coders
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tests.h"
+
+
+static lzma_stream_flags known_flags;
+static lzma_stream_flags decoded_flags;
+static uint8_t buffer[LZMA_STREAM_HEADER_SIZE];
+
+
+static bool
+validate(void)
+{
+        // TODO: This could require the specific error type as an argument.
+        // We could also test that lzma_stream_flags_compare() gives
+        // the correct return values in different situations.
+        return lzma_stream_flags_compare(&known_flags, &decoded_flags)
+                        != LZMA_OK;
+}
+
+
+static bool
+test_header_decoder(lzma_ret expected_ret)
+{
+        memcrap(&decoded_flags, sizeof(decoded_flags));
+
+        if (lzma_stream_header_decode(&decoded_flags, buffer) != expected_ret)
+                return true;
+
+        if (expected_ret != LZMA_OK)
+                return false;
+
+        // Header doesn't have Backward Size, so make
+        // lzma_stream_flags_compare() ignore it.
+        decoded_flags.backward_size = LZMA_VLI_UNKNOWN;
+        return validate();
+}
+
+
+static void
+test_header(void)
+{
+        memcrap(buffer, sizeof(buffer));
+        expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
+        succeed(test_header_decoder(LZMA_OK));
+}
+
+
+static bool
+test_footer_decoder(lzma_ret expected_ret)
+{
+        memcrap(&decoded_flags, sizeof(decoded_flags));
+
+        if (lzma_stream_footer_decode(&decoded_flags, buffer) != expected_ret)
+                return true;
+
+        if (expected_ret != LZMA_OK)
+                return false;
+
+        return validate();
+}
+
+
+static void
+test_footer(void)
+{
+        memcrap(buffer, sizeof(buffer));
+        expect(lzma_stream_footer_encode(&known_flags, buffer) == LZMA_OK);
+        succeed(test_footer_decoder(LZMA_OK));
+}
+
+
+static void
+test_encode_invalid(void)
+{
+        known_flags.check = LZMA_CHECK_ID_MAX + 1;
+        known_flags.backward_size = 1024;
+
+        expect(lzma_stream_header_encode(&known_flags, buffer)
+                        == LZMA_PROG_ERROR);
+
+        expect(lzma_stream_footer_encode(&known_flags, buffer)
+                        == LZMA_PROG_ERROR);
+
+        known_flags.check = (lzma_check)(-1);
+
+        expect(lzma_stream_header_encode(&known_flags, buffer)
+                        == LZMA_PROG_ERROR);
+
+        expect(lzma_stream_footer_encode(&known_flags, buffer)
+                        == LZMA_PROG_ERROR);
+
+        known_flags.check = LZMA_CHECK_NONE;
+        known_flags.backward_size = 0;
+
+        // Header encoder ignores backward_size.
+        expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
+
+        expect(lzma_stream_footer_encode(&known_flags, buffer)
+                        == LZMA_PROG_ERROR);
+
+        known_flags.backward_size = LZMA_VLI_MAX;
+
+        expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
+
+        expect(lzma_stream_footer_encode(&known_flags, buffer)
+                        == LZMA_PROG_ERROR);
+}
+
+
+static void
+test_decode_invalid(void)
+{
+        known_flags.check = LZMA_CHECK_NONE;
+        known_flags.backward_size = 1024;
+
+        expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
+
+        // Test 1 (invalid Magic Bytes)
+        buffer[5] ^= 1;
+        succeed(test_header_decoder(LZMA_FORMAT_ERROR));
+        buffer[5] ^= 1;
+
+        // Test 2a (valid CRC32)
+        uint32_t crc = lzma_crc32(buffer + 6, 2, 0);
+        unaligned_write32le(buffer + 8, crc);
+        succeed(test_header_decoder(LZMA_OK));
+
+        // Test 2b (invalid Stream Flags with valid CRC32)
+        buffer[6] ^= 0x20;
+        crc = lzma_crc32(buffer + 6, 2, 0);
+        unaligned_write32le(buffer + 8, crc);
+        succeed(test_header_decoder(LZMA_OPTIONS_ERROR));
+
+        // Test 3 (invalid CRC32)
+        expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
+        buffer[9] ^= 1;
+        succeed(test_header_decoder(LZMA_DATA_ERROR));
+
+        // Test 4 (invalid Stream Flags with valid CRC32)
+        expect(lzma_stream_footer_encode(&known_flags, buffer) == LZMA_OK);
+        buffer[9] ^= 0x40;
+        crc = lzma_crc32(buffer + 4, 6, 0);
+        unaligned_write32le(buffer, crc);
+        succeed(test_footer_decoder(LZMA_OPTIONS_ERROR));
+
+        // Test 5 (invalid Magic Bytes)
+        expect(lzma_stream_footer_encode(&known_flags, buffer) == LZMA_OK);
+        buffer[11] ^= 1;
+        succeed(test_footer_decoder(LZMA_FORMAT_ERROR));
+}
+
+
+int
+main(void)
+{
+        // Valid headers
+        known_flags.backward_size = 1024;
+        for (lzma_check check = LZMA_CHECK_NONE;
+                        check <= LZMA_CHECK_ID_MAX; ++check) {
+                test_header();
+                test_footer();
+        }
+
+        // Invalid headers
+        test_encode_invalid();
+        test_decode_invalid();
+
+        return 0;
+}