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