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liblzma/tests/test_index.c
Lasse Collin 1a7ec87c8e Revised the Index handling code. 
This breaks API and ABI but most apps are not affected
since most apps don't use this part of the API. You will
get a compile error if you are using anything that got
broken.

Summary of changes:

  - Ability to store Stream Flags, which are needed
    for random-access reading in multi-Stream files.

  - Separate function to set size of Stream Padding.

  - Iterator structure makes it possible to read the same
    lzma_index from multiple threads at the same time.

  - A lot faster code to locate Blocks.

  - Removed lzma_index_equal() without adding anything
    to replace it. I don't know what it should do exactly
    with the new features and what actually needs this
    function in the first place other than test_index.c,
    which now has its own code to compare lzma_indexes.
2009-12-31 22:45:53 +02:00

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///////////////////////////////////////////////////////////////////////////////
//
/// \file test_index.c
/// \brief Tests functions handling the lzma_index structure
//
// Author: Lasse Collin
//
// This file has been put into the public domain.
// You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////
#include "tests.h"
#define MEMLIMIT (LZMA_VLI_C(1) << 20)
#define SMALL_COUNT 3
#define BIG_COUNT 5555
static lzma_index *
create_empty(void)
{
lzma_index *i = lzma_index_init(NULL);
expect(i != NULL);
return i;
}
static lzma_index *
create_small(void)
{
lzma_index *i = lzma_index_init(NULL);
expect(i != NULL);
expect(lzma_index_append(i, NULL, 101, 555) == LZMA_OK);
expect(lzma_index_append(i, NULL, 602, 777) == LZMA_OK);
expect(lzma_index_append(i, NULL, 804, 999) == LZMA_OK);
return i;
}
static lzma_index *
create_big(void)
{
lzma_index *i = lzma_index_init(NULL);
expect(i != NULL);
lzma_vli total_size = 0;
lzma_vli uncompressed_size = 0;
// Add pseudo-random sizes (but always the same size values).
uint32_t n = 11;
for (size_t j = 0; j < BIG_COUNT; ++j) {
n = 7019 * n + 7607;
const uint32_t t = n * 3011;
expect(lzma_index_append(i, NULL, t, n) == LZMA_OK);
total_size += (t + 3) & ~LZMA_VLI_C(3);
uncompressed_size += n;
}
expect(lzma_index_block_count(i) == BIG_COUNT);
expect(lzma_index_total_size(i) == total_size);
expect(lzma_index_uncompressed_size(i) == uncompressed_size);
expect(lzma_index_total_size(i) + lzma_index_size(i)
+ 2 * LZMA_STREAM_HEADER_SIZE
== lzma_index_stream_size(i));
return i;
}
static bool
is_equal(const lzma_index *a, const lzma_index *b)
{
// Compare only the Stream and Block sizes and offsets.
lzma_index_iter ra, rb;
lzma_index_iter_init(&ra, a);
lzma_index_iter_init(&rb, b);
while (true) {
bool reta = lzma_index_iter_next(&ra, LZMA_INDEX_ITER_ANY);
bool retb = lzma_index_iter_next(&rb, LZMA_INDEX_ITER_ANY);
if (reta)
return !(reta ^ retb);
if (ra.stream.number != rb.stream.number
|| ra.stream.block_count
!= rb.stream.block_count
|| ra.stream.compressed_offset
!= rb.stream.compressed_offset
|| ra.stream.uncompressed_offset
!= rb.stream.uncompressed_offset
|| ra.stream.compressed_size
!= rb.stream.compressed_size
|| ra.stream.uncompressed_size
!= rb.stream.uncompressed_size
|| ra.stream.padding
!= rb.stream.padding)
return false;
if (ra.stream.block_count == 0)
continue;
if (ra.block.number_in_file != rb.block.number_in_file
|| ra.block.compressed_file_offset
!= rb.block.compressed_file_offset
|| ra.block.uncompressed_file_offset
!= rb.block.uncompressed_file_offset
|| ra.block.number_in_stream
!= rb.block.number_in_stream
|| ra.block.compressed_stream_offset
!= rb.block.compressed_stream_offset
|| ra.block.uncompressed_stream_offset
!= rb.block.uncompressed_stream_offset
|| ra.block.uncompressed_size
!= rb.block.uncompressed_size
|| ra.block.unpadded_size
!= rb.block.unpadded_size
|| ra.block.total_size
!= rb.block.total_size)
return false;
}
}
static void
test_equal(void)
{
lzma_index *a = create_empty();
lzma_index *b = create_small();
lzma_index *c = create_big();
expect(a && b && c);
expect(is_equal(a, a));
expect(is_equal(b, b));
expect(is_equal(c, c));
expect(!is_equal(a, b));
expect(!is_equal(a, c));
expect(!is_equal(b, c));
lzma_index_end(a, NULL);
lzma_index_end(b, NULL);
lzma_index_end(c, NULL);
}
static void
test_overflow(void)
{
// Integer overflow tests
lzma_index *i = create_empty();
expect(lzma_index_append(i, NULL, LZMA_VLI_MAX - 5, 1234)
== LZMA_DATA_ERROR);
// TODO
lzma_index_end(i, NULL);
}
static void
test_copy(const lzma_index *i)
{
lzma_index *d = lzma_index_dup(i, NULL);
expect(d != NULL);
expect(is_equal(i, d));
lzma_index_end(d, NULL);
}
static void
test_read(lzma_index *i)
{
lzma_index_iter r;
lzma_index_iter_init(&r, i);
// Try twice so we see that rewinding works.
for (size_t j = 0; j < 2; ++j) {
lzma_vli total_size = 0;
lzma_vli uncompressed_size = 0;
lzma_vli stream_offset = LZMA_STREAM_HEADER_SIZE;
lzma_vli uncompressed_offset = 0;
uint32_t count = 0;
while (!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)) {
++count;
total_size += r.block.total_size;
uncompressed_size += r.block.uncompressed_size;
expect(r.block.compressed_file_offset
== stream_offset);
expect(r.block.uncompressed_file_offset
== uncompressed_offset);
stream_offset += r.block.total_size;
uncompressed_offset += r.block.uncompressed_size;
}
expect(lzma_index_total_size(i) == total_size);
expect(lzma_index_uncompressed_size(i) == uncompressed_size);
expect(lzma_index_block_count(i) == count);
lzma_index_iter_rewind(&r);
}
}
static void
test_code(lzma_index *i)
{
const size_t alloc_size = 128 * 1024;
uint8_t *buf = malloc(alloc_size);
expect(buf != NULL);
// Encode
lzma_stream strm = LZMA_STREAM_INIT;
expect(lzma_index_encoder(&strm, i) == LZMA_OK);
const lzma_vli index_size = lzma_index_size(i);
succeed(coder_loop(&strm, NULL, 0, buf, index_size,
LZMA_STREAM_END, LZMA_RUN));
// Decode
lzma_index *d;
expect(lzma_index_decoder(&strm, &d, MEMLIMIT) == LZMA_OK);
expect(d == NULL);
succeed(decoder_loop(&strm, buf, index_size));
expect(is_equal(i, d));
lzma_index_end(d, NULL);
lzma_end(&strm);
// Decode with hashing
lzma_index_hash *h = lzma_index_hash_init(NULL, NULL);
expect(h != NULL);
lzma_index_iter r;
lzma_index_iter_init(&r, i);
while (!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK))
expect(lzma_index_hash_append(h, r.block.unpadded_size,
r.block.uncompressed_size) == LZMA_OK);
size_t pos = 0;
while (pos < index_size - 1)
expect(lzma_index_hash_decode(h, buf, &pos, pos + 1)
== LZMA_OK);
expect(lzma_index_hash_decode(h, buf, &pos, pos + 1)
== LZMA_STREAM_END);
lzma_index_hash_end(h, NULL);
// Encode buffer
size_t buf_pos = 1;
expect(lzma_index_buffer_encode(i, buf, &buf_pos, index_size)
== LZMA_BUF_ERROR);
expect(buf_pos == 1);
succeed(lzma_index_buffer_encode(i, buf, &buf_pos, index_size + 1));
expect(buf_pos == index_size + 1);
// Decode buffer
buf_pos = 1;
uint64_t memlimit = MEMLIMIT;
expect(lzma_index_buffer_decode(&d, &memlimit, NULL, buf, &buf_pos,
index_size) == LZMA_DATA_ERROR);
expect(buf_pos == 1);
expect(d == NULL);
succeed(lzma_index_buffer_decode(&d, &memlimit, NULL, buf, &buf_pos,
index_size + 1));
expect(buf_pos == index_size + 1);
expect(is_equal(i, d));
lzma_index_end(d, NULL);
free(buf);
}
static void
test_many(lzma_index *i)
{
test_copy(i);
test_read(i);
test_code(i);
}
static void
test_cat(void)
{
lzma_index *a, *b, *c;
lzma_index_iter r;
// Empty Indexes
a = create_empty();
b = create_empty();
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
expect(lzma_index_block_count(a) == 0);
expect(lzma_index_stream_size(a) == 2 * LZMA_STREAM_HEADER_SIZE + 8);
expect(lzma_index_file_size(a)
== 2 * (2 * LZMA_STREAM_HEADER_SIZE + 8));
lzma_index_iter_init(&r, a);
expect(lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK));
b = create_empty();
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
expect(lzma_index_block_count(a) == 0);
expect(lzma_index_stream_size(a) == 2 * LZMA_STREAM_HEADER_SIZE + 8);
expect(lzma_index_file_size(a)
== 3 * (2 * LZMA_STREAM_HEADER_SIZE + 8));
b = create_empty();
c = create_empty();
expect(lzma_index_stream_padding(b, 4) == LZMA_OK);
expect(lzma_index_cat(b, c, NULL) == LZMA_OK);
expect(lzma_index_block_count(b) == 0);
expect(lzma_index_stream_size(b) == 2 * LZMA_STREAM_HEADER_SIZE + 8);
expect(lzma_index_file_size(b)
== 2 * (2 * LZMA_STREAM_HEADER_SIZE + 8) + 4);
expect(lzma_index_stream_padding(a, 8) == LZMA_OK);
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
expect(lzma_index_block_count(a) == 0);
expect(lzma_index_stream_size(a) == 2 * LZMA_STREAM_HEADER_SIZE + 8);
expect(lzma_index_file_size(a)
== 5 * (2 * LZMA_STREAM_HEADER_SIZE + 8) + 4 + 8);
expect(lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK));
lzma_index_iter_rewind(&r);
expect(lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK));
lzma_index_end(a, NULL);
// Small Indexes
a = create_small();
lzma_vli stream_size = lzma_index_stream_size(a);
lzma_index_iter_init(&r, a);
for (int i = SMALL_COUNT; i >= 0; --i)
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)
^ (i == 0));
b = create_small();
expect(lzma_index_stream_padding(a, 4) == LZMA_OK);
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
expect(lzma_index_file_size(a) == stream_size * 2 + 4);
expect(lzma_index_stream_size(a) > stream_size);
expect(lzma_index_stream_size(a) < stream_size * 2);
for (int i = SMALL_COUNT; i >= 0; --i)
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)
^ (i == 0));
lzma_index_iter_rewind(&r);
for (int i = SMALL_COUNT * 2; i >= 0; --i)
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)
^ (i == 0));
b = create_small();
c = create_small();
expect(lzma_index_stream_padding(b, 8) == LZMA_OK);
expect(lzma_index_cat(b, c, NULL) == LZMA_OK);
expect(lzma_index_stream_padding(a, 12) == LZMA_OK);
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
expect(lzma_index_file_size(a) == stream_size * 4 + 4 + 8 + 12);
expect(lzma_index_block_count(a) == SMALL_COUNT * 4);
for (int i = SMALL_COUNT * 2; i >= 0; --i)
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)
^ (i == 0));
lzma_index_iter_rewind(&r);
for (int i = SMALL_COUNT * 4; i >= 0; --i)
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)
^ (i == 0));
lzma_index_end(a, NULL);
// Mix of empty and small
a = create_empty();
b = create_small();
expect(lzma_index_stream_padding(a, 4) == LZMA_OK);
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
lzma_index_iter_init(&r, a);
for (int i = SMALL_COUNT; i >= 0; --i)
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)
^ (i == 0));
lzma_index_end(a, NULL);
// Big Indexes
a = create_big();
stream_size = lzma_index_stream_size(a);
b = create_big();
expect(lzma_index_stream_padding(a, 4) == LZMA_OK);
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
expect(lzma_index_file_size(a) == stream_size * 2 + 4);
expect(lzma_index_stream_size(a) > stream_size);
expect(lzma_index_stream_size(a) < stream_size * 2);
b = create_big();
c = create_big();
expect(lzma_index_stream_padding(b, 8) == LZMA_OK);
expect(lzma_index_cat(b, c, NULL) == LZMA_OK);
expect(lzma_index_stream_padding(a, 12) == LZMA_OK);
expect(lzma_index_cat(a, b, NULL) == LZMA_OK);
expect(lzma_index_file_size(a) == stream_size * 4 + 4 + 8 + 12);
lzma_index_iter_init(&r, a);
for (int i = BIG_COUNT * 4; i >= 0; --i)
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK)
^ (i == 0));
lzma_index_end(a, NULL);
}
static void
test_locate(void)
{
lzma_index *i = lzma_index_init(NULL);
expect(i != NULL);
lzma_index_iter r;
lzma_index_iter_init(&r, i);
// Cannot locate anything from an empty Index.
expect(lzma_index_iter_locate(&r, 0));
expect(lzma_index_iter_locate(&r, 555));
// One empty Record: nothing is found since there's no uncompressed
// data.
expect(lzma_index_append(i, NULL, 16, 0) == LZMA_OK);
expect(lzma_index_iter_locate(&r, 0));
// Non-empty Record and we can find something.
expect(lzma_index_append(i, NULL, 32, 5) == LZMA_OK);
expect(!lzma_index_iter_locate(&r, 0));
expect(r.block.total_size == 32);
expect(r.block.uncompressed_size == 5);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + 16);
expect(r.block.uncompressed_file_offset == 0);
// Still cannot find anything past the end.
expect(lzma_index_iter_locate(&r, 5));
// Add the third Record.
expect(lzma_index_append(i, NULL, 40, 11) == LZMA_OK);
expect(!lzma_index_iter_locate(&r, 0));
expect(r.block.total_size == 32);
expect(r.block.uncompressed_size == 5);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + 16);
expect(r.block.uncompressed_file_offset == 0);
expect(!lzma_index_iter_next(&r, LZMA_INDEX_ITER_BLOCK));
expect(r.block.total_size == 40);
expect(r.block.uncompressed_size == 11);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + 16 + 32);
expect(r.block.uncompressed_file_offset == 5);
expect(!lzma_index_iter_locate(&r, 2));
expect(r.block.total_size == 32);
expect(r.block.uncompressed_size == 5);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + 16);
expect(r.block.uncompressed_file_offset == 0);
expect(!lzma_index_iter_locate(&r, 5));
expect(r.block.total_size == 40);
expect(r.block.uncompressed_size == 11);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + 16 + 32);
expect(r.block.uncompressed_file_offset == 5);
expect(!lzma_index_iter_locate(&r, 5 + 11 - 1));
expect(r.block.total_size == 40);
expect(r.block.uncompressed_size == 11);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + 16 + 32);
expect(r.block.uncompressed_file_offset == 5);
expect(lzma_index_iter_locate(&r, 5 + 11));
expect(lzma_index_iter_locate(&r, 5 + 15));
// Large Index
lzma_index_end(i, NULL);
i = lzma_index_init(NULL);
expect(i != NULL);
lzma_index_iter_init(&r, i);
for (size_t n = 4; n <= 4 * 5555; n += 4)
expect(lzma_index_append(i, NULL, n + 8, n) == LZMA_OK);
expect(lzma_index_block_count(i) == 5555);
// First Record
expect(!lzma_index_iter_locate(&r, 0));
expect(r.block.total_size == 4 + 8);
expect(r.block.uncompressed_size == 4);
expect(r.block.compressed_file_offset == LZMA_STREAM_HEADER_SIZE);
expect(r.block.uncompressed_file_offset == 0);
expect(!lzma_index_iter_locate(&r, 3));
expect(r.block.total_size == 4 + 8);
expect(r.block.uncompressed_size == 4);
expect(r.block.compressed_file_offset == LZMA_STREAM_HEADER_SIZE);
expect(r.block.uncompressed_file_offset == 0);
// Second Record
expect(!lzma_index_iter_locate(&r, 4));
expect(r.block.total_size == 2 * 4 + 8);
expect(r.block.uncompressed_size == 2 * 4);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + 4 + 8);
expect(r.block.uncompressed_file_offset == 4);
// Last Record
expect(!lzma_index_iter_locate(
&r, lzma_index_uncompressed_size(i) - 1));
expect(r.block.total_size == 4 * 5555 + 8);
expect(r.block.uncompressed_size == 4 * 5555);
expect(r.block.compressed_file_offset == lzma_index_total_size(i)
+ LZMA_STREAM_HEADER_SIZE - 4 * 5555 - 8);
expect(r.block.uncompressed_file_offset
== lzma_index_uncompressed_size(i) - 4 * 5555);
// Allocation chunk boundaries. See INDEX_GROUP_SIZE in
// liblzma/common/index.c.
const size_t group_multiple = 256 * 4;
const size_t radius = 8;
const size_t start = group_multiple - radius;
lzma_vli ubase = 0;
lzma_vli tbase = 0;
size_t n;
for (n = 1; n < start; ++n) {
ubase += n * 4;
tbase += n * 4 + 8;
}
while (n < start + 2 * radius) {
expect(!lzma_index_iter_locate(&r, ubase + n * 4));
expect(r.block.compressed_file_offset == tbase + n * 4 + 8
+ LZMA_STREAM_HEADER_SIZE);
expect(r.block.uncompressed_file_offset == ubase + n * 4);
tbase += n * 4 + 8;
ubase += n * 4;
++n;
expect(r.block.total_size == n * 4 + 8);
expect(r.block.uncompressed_size == n * 4);
}
// Do it also backwards.
while (n > start) {
expect(!lzma_index_iter_locate(&r, ubase + (n - 1) * 4));
expect(r.block.total_size == n * 4 + 8);
expect(r.block.uncompressed_size == n * 4);
--n;
tbase -= n * 4 + 8;
ubase -= n * 4;
expect(r.block.compressed_file_offset == tbase + n * 4 + 8
+ LZMA_STREAM_HEADER_SIZE);
expect(r.block.uncompressed_file_offset == ubase + n * 4);
}
// Test locating in concatend Index.
lzma_index_end(i, NULL);
i = lzma_index_init(NULL);
expect(i != NULL);
lzma_index_iter_init(&r, i);
for (n = 0; n < group_multiple; ++n)
expect(lzma_index_append(i, NULL, 8, 0) == LZMA_OK);
expect(lzma_index_append(i, NULL, 16, 1) == LZMA_OK);
expect(!lzma_index_iter_locate(&r, 0));
expect(r.block.total_size == 16);
expect(r.block.uncompressed_size == 1);
expect(r.block.compressed_file_offset
== LZMA_STREAM_HEADER_SIZE + group_multiple * 8);
expect(r.block.uncompressed_file_offset == 0);
lzma_index_end(i, NULL);
}
static void
test_corrupt(void)
{
const size_t alloc_size = 128 * 1024;
uint8_t *buf = malloc(alloc_size);
expect(buf != NULL);
lzma_stream strm = LZMA_STREAM_INIT;
lzma_index *i = create_empty();
expect(lzma_index_append(i, NULL, 0, 1) == LZMA_PROG_ERROR);
lzma_index_end(i, NULL);
// Create a valid Index and corrupt it in different ways.
i = create_small();
expect(lzma_index_encoder(&strm, i) == LZMA_OK);
succeed(coder_loop(&strm, NULL, 0, buf, 20,
LZMA_STREAM_END, LZMA_RUN));
lzma_index_end(i, NULL);
// Wrong Index Indicator
buf[0] ^= 1;
expect(lzma_index_decoder(&strm, &i, MEMLIMIT) == LZMA_OK);
succeed(decoder_loop_ret(&strm, buf, 1, LZMA_DATA_ERROR));
buf[0] ^= 1;
// Wrong Number of Records and thus CRC32 fails.
--buf[1];
expect(lzma_index_decoder(&strm, &i, MEMLIMIT) == LZMA_OK);
succeed(decoder_loop_ret(&strm, buf, 10, LZMA_DATA_ERROR));
++buf[1];
// Padding not NULs
buf[15] ^= 1;
expect(lzma_index_decoder(&strm, &i, MEMLIMIT) == LZMA_OK);
succeed(decoder_loop_ret(&strm, buf, 16, LZMA_DATA_ERROR));
lzma_end(&strm);
free(buf);
}
int
main(void)
{
test_equal();
test_overflow();
lzma_index *i = create_empty();
test_many(i);
lzma_index_end(i, NULL);
i = create_small();
test_many(i);
lzma_index_end(i, NULL);
i = create_big();
test_many(i);
lzma_index_end(i, NULL);
test_cat();
test_locate();
test_corrupt();
return 0;
}
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