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///////////////////////////////////////////////////////////////////////////////
//
/// \file test_bcj_exact_size.c
/// \brief Tests BCJ decoding when the output size is known
///
/// These tests fail with XZ Utils 5.0.3 and earlier.
//
// 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 void
test_exact_size(void)
{
#if !defined(HAVE_ENCODERS) || !defined(HAVE_DECODERS)
assert_skip("Encoder or decoder support disabled");
#else
if (!lzma_filter_encoder_is_supported(LZMA_FILTER_POWERPC)
|| !lzma_filter_decoder_is_supported(
LZMA_FILTER_POWERPC))
assert_skip("PowerPC BCJ encoder and/or decoder "
"is disabled");
// Something to be compressed
const uint8_t in[16] = "0123456789ABCDEF";
// in[] after compression
uint8_t compressed[1024];
size_t compressed_size = 0;
// Output buffer for decompressing compressed[]
uint8_t out[sizeof(in)];
// Compress with PowerPC BCJ and LZMA2. PowerPC BCJ is used because
// it has fixed 4-byte alignment which makes triggering the potential
// bug easy.
lzma_options_lzma opt_lzma2;
assert_false(lzma_lzma_preset(&opt_lzma2, 0));
lzma_filter filters[3] = {
{ .id = LZMA_FILTER_POWERPC, .options = NULL },
{ .id = LZMA_FILTER_LZMA2, .options = &opt_lzma2 },
{ .id = LZMA_VLI_UNKNOWN, .options = NULL },
};
assert_lzma_ret(lzma_stream_buffer_encode(
filters, LZMA_CHECK_CRC32, NULL,
in, sizeof(in),
compressed, &compressed_size, sizeof(compressed)),
LZMA_OK);
// Decompress so that we won't give more output space than
// the Stream will need.
lzma_stream strm = LZMA_STREAM_INIT;
assert_lzma_ret(lzma_stream_decoder(&strm, 10 << 20, 0), LZMA_OK);
strm.next_in = compressed;
strm.next_out = out;
while (true) {
if (strm.total_in < compressed_size)
strm.avail_in = 1;
const lzma_ret ret = lzma_code(&strm, LZMA_RUN);
if (ret == LZMA_STREAM_END) {
assert_uint_eq(strm.total_in, compressed_size);
assert_uint_eq(strm.total_out, sizeof(in));
lzma_end(&strm);
return;
}
assert_lzma_ret(ret, LZMA_OK);
if (strm.total_out < sizeof(in))
strm.avail_out = 1;
}
#endif
}
static void
test_empty_block(void)
{
#ifndef HAVE_DECODERS
assert_skip("Decoder support disabled");
#else
if (!lzma_filter_decoder_is_supported(LZMA_FILTER_POWERPC))
assert_skip("PowerPC BCJ decoder is disabled");
// An empty file with one Block using PowerPC BCJ and LZMA2.
size_t in_size;
uint8_t *empty_bcj_lzma2 = tuktest_file_from_srcdir(
"files/good-1-empty-bcj-lzma2.xz", &in_size);
// Decompress without giving any output space.
uint64_t memlimit = 1 << 20;
uint8_t out[1];
size_t in_pos = 0;
size_t out_pos = 0;
assert_lzma_ret(lzma_stream_buffer_decode(&memlimit, 0, NULL,
empty_bcj_lzma2, &in_pos, in_size, out, &out_pos, 0),
LZMA_OK);
assert_uint_eq(in_pos, in_size);
assert_uint_eq(out_pos, 0);
#endif
}
extern int
main(int argc, char **argv)
{
tuktest_start(argc, argv);
tuktest_run(test_exact_size);
tuktest_run(test_empty_block);
return tuktest_end();
}
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