liblzma/tests/test_index_hash.c
Jia Tan 3959162bae Tests: Creates test_index_hash.c
Tests all API functions exported from index_hash.h. Does not have a
dedicated test for lzma_index_hash_end.
2023-01-02 22:20:04 +08:00

380 lines
11 KiB
C

///////////////////////////////////////////////////////////////////////////////
//
/// \file test_index_hash.c
/// \brief Tests src/liblzma/common/index_hash.c API functions
///
/// \note No test included for lzma_index_hash_end since it
/// would be trivial unless tested for memory leaks
/// with something like valgrind
//
// Author: Jia Tan
//
// This file has been put into the public domain.
// You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////
#include "tests.h"
// Needed for UNPADDED_SIZE_MIN and UNPADDED_SIZE_MAX macro definitions
// and index_size and vli_ceil4 helper functions
#include "common/index.h"
static void
test_lzma_index_hash_init(void)
{
#ifndef HAVE_DECODERS
assert_skip("Decoder support disabled");
#else
// First test with NULL index hash
// This should create a fresh index hash
lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL);
assert_true(index_hash != NULL);
// Next test with non-NULL index hash
lzma_index_hash *second_hash = lzma_index_hash_init(index_hash, NULL);
// Should not create a new index_hash pointer
// Instead must just re-init the first index hash
assert_true(index_hash == second_hash);
lzma_index_hash_end(index_hash, NULL);
#endif
}
static void
test_lzma_index_hash_append(void)
{
#ifndef HAVE_DECODERS
assert_skip("Decoder support disabled");
#else
// Test all invalid parameters
assert_lzma_ret(lzma_index_hash_append(NULL, 0, 0),
LZMA_PROG_ERROR);
// Test NULL index_hash
assert_lzma_ret(lzma_index_hash_append(NULL, UNPADDED_SIZE_MIN,
LZMA_VLI_MAX), LZMA_PROG_ERROR);
// Test with invalid unpadded size
lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL);
assert_true(index_hash);
assert_lzma_ret(lzma_index_hash_append(index_hash,
UNPADDED_SIZE_MIN - 1, LZMA_VLI_MAX),
LZMA_PROG_ERROR);
// Test with invalid uncompressed size
assert_lzma_ret(lzma_index_hash_append(index_hash,
UNPADDED_SIZE_MIN, LZMA_VLI_MAX + 1),
LZMA_PROG_ERROR);
// Append first a small "block" to the index, which should succeed
assert_lzma_ret(lzma_index_hash_append(index_hash,
UNPADDED_SIZE_MIN, 1), LZMA_OK);
// Append another small "block"
assert_lzma_ret(lzma_index_hash_append(index_hash,
UNPADDED_SIZE_MIN, 1), LZMA_OK);
// Append a block that would cause the compressed size to grow
// too big
assert_lzma_ret(lzma_index_hash_append(index_hash,
UNPADDED_SIZE_MAX, 1), LZMA_DATA_ERROR);
lzma_index_hash_end(index_hash, NULL);
#endif
}
#ifdef HAVE_DECODERS
// Fill an index_hash with unpadded and uncompressed VLIs
// by calling lzma_index_hash_append
static void
fill_index_hash(lzma_index_hash *index_hash, const lzma_vli *unpadded_sizes,
const lzma_vli *uncomp_sizes, uint32_t block_count)
{
for(uint32_t i = 0; i < block_count; i++)
assert_lzma_ret(lzma_index_hash_append(index_hash,
unpadded_sizes[i], uncomp_sizes[i]), LZMA_OK);
}
#ifdef HAVE_ENCODERS
// Set the index parameter to the expected index based on the
// xz specification. Needs the unpadded and uncompressed VLIs
// to correctly create the index
static void
generate_index(uint8_t *index, const lzma_vli *unpadded_sizes,
const lzma_vli *uncomp_sizes, uint32_t block_count,
size_t index_max_size)
{
size_t in_pos = 0;
size_t out_pos = 0;
// First set index indicator
index[out_pos++] = 0;
// Next write out Number of Records
assert_lzma_ret(lzma_vli_encode(block_count, &in_pos, index,
&out_pos, index_max_size), LZMA_STREAM_END);
// Next write out each record
// A record consists of unpadded size and uncompressed size
// written next to each other as VLIs
for (uint32_t i = 0; i < block_count; i++) {
in_pos = 0;
assert_lzma_ret(lzma_vli_encode(unpadded_sizes[i], &in_pos,
index, &out_pos, index_max_size), LZMA_STREAM_END);
in_pos = 0;
assert_lzma_ret(lzma_vli_encode(uncomp_sizes[i], &in_pos,
index, &out_pos, index_max_size), LZMA_STREAM_END);
}
// Add index padding
lzma_vli rounded_out_pos = vli_ceil4(out_pos);
memzero(index + out_pos, rounded_out_pos - out_pos);
out_pos = rounded_out_pos;
// Add the CRC32
write32le(index + out_pos, lzma_crc32(index, out_pos, 0));
}
#endif
#endif
static void
test_lzma_index_hash_decode(void)
{
#if !defined(HAVE_ENCODERS) || !defined(HAVE_DECODERS)
assert_skip("Encoder or decoder support disabled");
#else
lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL);
assert_true(index_hash);
size_t in_pos = 0;
// Six valid sizes for unpadded data sizes
const lzma_vli unpadded_sizes[6] = {
UNPADDED_SIZE_MIN,
1000,
4000,
8000,
16000,
32000
};
// Six valid sizes for uncompressed data sizes
const lzma_vli uncomp_sizes[6] = {
1,
500,
8000,
20,
1,
500
};
// Add two entries to a index hash
fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 2);
const lzma_vli size_two_entries = lzma_index_hash_size(index_hash);
assert_uint(size_two_entries, >, 0);
uint8_t *index_two_entries = tuktest_malloc(size_two_entries);
generate_index(index_two_entries, unpadded_sizes, uncomp_sizes, 2,
size_two_entries);
// First test for basic buffer size error
in_pos = size_two_entries + 1;
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_two_entries, &in_pos,
size_two_entries), LZMA_BUF_ERROR);
// Next test for invalid index indicator
in_pos = 0;
index_two_entries[0] ^= 1;
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_two_entries, &in_pos,
size_two_entries), LZMA_DATA_ERROR);
index_two_entries[0] ^= 1;
// Next verify the index_hash as expected
in_pos = 0;
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_two_entries, &in_pos,
size_two_entries), LZMA_STREAM_END);
// Next test a three entry index hash
index_hash = lzma_index_hash_init(index_hash, NULL);
fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 3);
const lzma_vli size_three_entries = lzma_index_hash_size(
index_hash);
assert_uint(size_three_entries, >, 0);
uint8_t *index_three_entries = tuktest_malloc(size_three_entries);
generate_index(index_three_entries, unpadded_sizes, uncomp_sizes,
3, size_three_entries);
in_pos = 0;
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_three_entries, &in_pos,
size_three_entries), LZMA_STREAM_END);
// Next test a five entry index hash
index_hash = lzma_index_hash_init(index_hash, NULL);
fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 5);
const lzma_vli size_five_entries = lzma_index_hash_size(
index_hash);
assert_uint(size_five_entries, >, 0);
uint8_t *index_five_entries = tuktest_malloc(size_five_entries);
generate_index(index_five_entries, unpadded_sizes, uncomp_sizes, 5,
size_five_entries);
// Instead of testing all input at once, give input
// one byte at a time
in_pos = 0;
for (lzma_vli i = 0; i < size_five_entries - 1; i++) {
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_five_entries, &in_pos, in_pos + 1),
LZMA_OK);
}
// Last byte should return LZMA_STREAM_END
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_five_entries, &in_pos,
in_pos + 1), LZMA_STREAM_END);
// Next test if the index hash is given an incorrect unpadded
// size. Should detect and report LZMA_DATA_ERROR
index_hash = lzma_index_hash_init(index_hash, NULL);
fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 5);
// The sixth entry will have invalid unpadded size
assert_lzma_ret(lzma_index_hash_append(index_hash,
unpadded_sizes[5] + 1,
uncomp_sizes[5]), LZMA_OK);
const lzma_vli size_six_entries = lzma_index_hash_size(
index_hash);
assert_uint(size_six_entries, >, 0);
uint8_t *index_six_entries = tuktest_malloc(size_six_entries);
generate_index(index_six_entries, unpadded_sizes, uncomp_sizes, 6,
size_six_entries);
in_pos = 0;
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_six_entries, &in_pos,
size_six_entries), LZMA_DATA_ERROR);
// Next test if the index is corrupt (invalid CRC)
// Should detect and report LZMA_DATA_ERROR
index_hash = lzma_index_hash_init(index_hash, NULL);
fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 2);
index_two_entries[size_two_entries - 1] ^= 1;
in_pos = 0;
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_two_entries, &in_pos,
size_two_entries), LZMA_DATA_ERROR);
// Next test with index and index_hash struct not matching
// an entry
index_hash = lzma_index_hash_init(index_hash, NULL);
fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 2);
// Recalculate index with invalid unpadded size
const lzma_vli unpadded_sizes_invalid[2] = {
unpadded_sizes[0],
unpadded_sizes[1] + 1
};
generate_index(index_two_entries, unpadded_sizes_invalid,
uncomp_sizes, 2, size_two_entries);
in_pos = 0;
assert_lzma_ret(lzma_index_hash_decode(index_hash,
index_two_entries, &in_pos,
size_two_entries), LZMA_DATA_ERROR);
lzma_index_hash_end(index_hash, NULL);
#endif
}
static void
test_lzma_index_hash_size(void)
{
#ifndef HAVE_DECODERS
assert_skip("Decoder support disabled");
#else
lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL);
assert_true(index_hash);
// First test empty index hash
// Expected size should be:
// Index Indicator - 1 byte
// Number of Records - 1 byte
// List of Records - 0 bytes
// Index Padding - 2 bytes
// CRC32 - 4 bytes
// Total - 8 bytes
assert_uint_eq(lzma_index_hash_size(index_hash), 8);
// Append a small block to the index hash
assert_lzma_ret(lzma_index_hash_append(index_hash,
UNPADDED_SIZE_MIN, 1), LZMA_OK);
// Expected size should be:
// Index Indicator - 1 byte
// Number of Records - 1 byte
// List of Records - 2 bytes
// Index Padding - 0 bytes
// CRC32 - 4 bytes
// Total - 8 bytes
lzma_vli expected_size = 8;
assert_uint_eq(lzma_index_hash_size(index_hash), expected_size);
// Append additional small block
assert_lzma_ret(lzma_index_hash_append(index_hash,
UNPADDED_SIZE_MIN, 1), LZMA_OK);
// Expected size should be:
// Index Indicator - 1 byte
// Number of Records - 1 byte
// List of Records - 4 bytes
// Index Padding - 2 bytes
// CRC32 - 4 bytes
// Total - 12 bytes
expected_size = 12;
assert_uint_eq(lzma_index_hash_size(index_hash), expected_size);
// Append a larger block to the index hash (3 bytes for each vli)
const lzma_vli three_byte_vli = 0x10000;
assert_lzma_ret(lzma_index_hash_append(index_hash,
three_byte_vli, three_byte_vli), LZMA_OK);
// Expected size should be:
// Index Indicator - 1 byte
// Number of Records - 1 byte
// List of Records - 10 bytes
// Index Padding - 0 bytes
// CRC32 - 4 bytes
// Total - 16 bytes
expected_size = 16;
assert_uint_eq(lzma_index_hash_size(index_hash), expected_size);
#endif
}
extern int
main(int argc, char **argv)
{
tuktest_start(argc, argv);
tuktest_run(test_lzma_index_hash_init);
tuktest_run(test_lzma_index_hash_append);
tuktest_run(test_lzma_index_hash_decode);
tuktest_run(test_lzma_index_hash_size);
return tuktest_end();
}