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

xz/tests/test_filter_flags.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       test_filter_flags.c
+/// \brief      Tests Filter Flags 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 uint8_t buffer[4096];
+static lzma_filter known_flags;
+static lzma_filter decoded_flags;
+static lzma_stream strm = LZMA_STREAM_INIT;
+
+
+static bool
+encode(uint32_t known_size)
+{
+        memcrap(buffer, sizeof(buffer));
+
+        uint32_t tmp;
+        if (lzma_filter_flags_size(&tmp, &known_flags) != LZMA_OK)
+                return true;
+
+        if (tmp != known_size)
+                return true;
+
+        size_t out_pos = 0;
+        if (lzma_filter_flags_encode(&known_flags,
+                        buffer, &out_pos, known_size) != LZMA_OK)
+                return true;
+
+        if (out_pos != known_size)
+                return true;
+
+        return false;
+}
+
+
+static bool
+decode_ret(uint32_t known_size, lzma_ret expected_ret)
+{
+        memcrap(&decoded_flags, sizeof(decoded_flags));
+
+        size_t pos = 0;
+        if (lzma_filter_flags_decode(&decoded_flags, NULL,
+                                buffer, &pos, known_size) != expected_ret
+                        || pos != known_size)
+                return true;
+
+        return false;
+}
+
+
+static bool
+decode(uint32_t known_size)
+{
+        if (decode_ret(known_size, LZMA_OK))
+                return true;
+
+        if (known_flags.id != decoded_flags.id)
+                return true;
+
+        return false;
+}
+
+
+#if defined(HAVE_ENCODER_X86) && defined(HAVE_DECODER_X86)
+static void
+test_bcj(void)
+{
+        // Test 1
+        known_flags.id = LZMA_FILTER_X86;
+        known_flags.options = NULL;
+
+        expect(!encode(2));
+        expect(!decode(2));
+        expect(decoded_flags.options == NULL);
+
+        // Test 2
+        lzma_options_bcj options;
+        options.start_offset = 0;
+        known_flags.options = &options;
+        expect(!encode(2));
+        expect(!decode(2));
+        expect(decoded_flags.options == NULL);
+
+        // Test 3
+        options.start_offset = 123456;
+        known_flags.options = &options;
+        expect(!encode(6));
+        expect(!decode(6));
+        expect(decoded_flags.options != NULL);
+
+        lzma_options_bcj *decoded = decoded_flags.options;
+        expect(decoded->start_offset == options.start_offset);
+
+        free(decoded);
+}
+#endif
+
+
+#if defined(HAVE_ENCODER_DELTA) && defined(HAVE_DECODER_DELTA)
+static void
+test_delta(void)
+{
+        // Test 1
+        known_flags.id = LZMA_FILTER_DELTA;
+        known_flags.options = NULL;
+        expect(encode(99));
+
+        // Test 2
+        lzma_options_delta options = {
+                .type = LZMA_DELTA_TYPE_BYTE,
+                .dist = 0
+        };
+        known_flags.options = &options;
+        expect(encode(99));
+
+        // Test 3
+        options.dist = LZMA_DELTA_DIST_MIN;
+        expect(!encode(3));
+        expect(!decode(3));
+        expect(((lzma_options_delta *)(decoded_flags.options))->dist
+                        == options.dist);
+
+        free(decoded_flags.options);
+
+        // Test 4
+        options.dist = LZMA_DELTA_DIST_MAX;
+        expect(!encode(3));
+        expect(!decode(3));
+        expect(((lzma_options_delta *)(decoded_flags.options))->dist
+                        == options.dist);
+
+        free(decoded_flags.options);
+
+        // Test 5
+        options.dist = LZMA_DELTA_DIST_MAX + 1;
+        expect(encode(99));
+}
+#endif
+
+/*
+#ifdef HAVE_FILTER_LZMA
+static void
+validate_lzma(void)
+{
+        const lzma_options_lzma *known = known_flags.options;
+        const lzma_options_lzma *decoded = decoded_flags.options;
+
+        expect(known->dictionary_size <= decoded->dictionary_size);
+
+        if (known->dictionary_size == 1)
+                expect(decoded->dictionary_size == 1);
+        else
+                expect(known->dictionary_size + known->dictionary_size / 2
+                                > decoded->dictionary_size);
+
+        expect(known->literal_context_bits == decoded->literal_context_bits);
+        expect(known->literal_pos_bits == decoded->literal_pos_bits);
+        expect(known->pos_bits == decoded->pos_bits);
+}
+
+
+static void
+test_lzma(void)
+{
+        // Test 1
+        known_flags.id = LZMA_FILTER_LZMA1;
+        known_flags.options = NULL;
+        expect(encode(99));
+
+        // Test 2
+        lzma_options_lzma options = {
+                .dictionary_size = 0,
+                .literal_context_bits = 0,
+                .literal_pos_bits = 0,
+                .pos_bits = 0,
+                .preset_dictionary = NULL,
+                .preset_dictionary_size = 0,
+                .mode = LZMA_MODE_INVALID,
+                .fast_bytes = 0,
+                .match_finder = LZMA_MF_INVALID,
+                .match_finder_cycles = 0,
+        };
+
+        // Test 3 (empty dictionary not allowed)
+        known_flags.options = &options;
+        expect(encode(99));
+
+        // Test 4 (brute-force test some valid dictionary sizes)
+        options.dictionary_size = LZMA_DICTIONARY_SIZE_MIN;
+        while (options.dictionary_size != LZMA_DICTIONARY_SIZE_MAX) {
+                if (++options.dictionary_size == 5000)
+                        options.dictionary_size = LZMA_DICTIONARY_SIZE_MAX - 5;
+
+                expect(!encode(4));
+                expect(!decode(4));
+                validate_lzma();
+
+                free(decoded_flags.options);
+        }
+
+        // Test 5 (too big dictionary size)
+        options.dictionary_size = LZMA_DICTIONARY_SIZE_MAX + 1;
+        expect(encode(99));
+
+        // Test 6 (brute-force test lc/lp/pb)
+        options.dictionary_size = LZMA_DICTIONARY_SIZE_MIN;
+        for (uint32_t lc = LZMA_LITERAL_CONTEXT_BITS_MIN;
+                        lc <= LZMA_LITERAL_CONTEXT_BITS_MAX; ++lc) {
+                for (uint32_t lp = LZMA_LITERAL_POS_BITS_MIN;
+                                lp <= LZMA_LITERAL_POS_BITS_MAX; ++lp) {
+                        for (uint32_t pb = LZMA_POS_BITS_MIN;
+                                        pb <= LZMA_POS_BITS_MAX; ++pb) {
+                                if (lc + lp > LZMA_LITERAL_BITS_MAX)
+                                        continue;
+
+                                options.literal_context_bits = lc;
+                                options.literal_pos_bits = lp;
+                                options.pos_bits = pb;
+
+                                expect(!encode(4));
+                                expect(!decode(4));
+                                validate_lzma();
+
+                                free(decoded_flags.options);
+                        }
+                }
+        }
+}
+#endif
+*/
+
+int
+main(void)
+{
+#if defined(HAVE_ENCODER_X86) && defined(HAVE_DECODER_X86)
+        test_bcj();
+#endif
+#if defined(HAVE_ENCODER_DELTA) && defined(HAVE_DECODER_DELTA)
+        test_delta();
+#endif
+// #ifdef HAVE_FILTER_LZMA
+//      test_lzma();
+// #endif
+
+        lzma_end(&strm);
+
+        return 0;
+}