mirror of https://git.tukaani.org/xz.git
113 lines
2.7 KiB
C
113 lines
2.7 KiB
C
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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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// This file has been put into the public domain.
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// You can do whatever you want with this file.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "tests.h"
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/// Something to be compressed
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static const uint8_t in[16] = "0123456789ABCDEF";
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/// in[] after compression
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static uint8_t compressed[1024];
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static size_t compressed_size = 0;
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/// Output buffer for decompressing compressed[]
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static uint8_t out[sizeof(in)];
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static void
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compress(void)
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{
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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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succeed(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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expect(lzma_stream_buffer_encode(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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}
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static void
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decompress(void)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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expect(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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expect(strm.total_in == compressed_size);
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expect(strm.total_out == sizeof(in));
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return;
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}
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expect(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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}
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static void
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decompress_empty(void)
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{
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// An empty file with one Block using PowerPC BCJ and LZMA2.
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static const uint8_t empty_bcj_lzma2[] = {
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0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00, 0x00, 0x01,
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0x69, 0x22, 0xDE, 0x36, 0x02, 0x01, 0x05, 0x00,
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0x21, 0x01, 0x00, 0x00, 0x7F, 0xE0, 0xF1, 0xC8,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x01, 0x11, 0x00, 0x3B, 0x96, 0x5F, 0x73,
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0x90, 0x42, 0x99, 0x0D, 0x01, 0x00, 0x00, 0x00,
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0x00, 0x01, 0x59, 0x5A
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};
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// Decompress without giving any output space.
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uint64_t memlimit = 1 << 20;
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size_t in_pos = 0;
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size_t out_pos = 0;
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expect(lzma_stream_buffer_decode(&memlimit, 0, NULL,
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empty_bcj_lzma2, &in_pos, sizeof(empty_bcj_lzma2),
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out, &out_pos, 0) == LZMA_OK);
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expect(in_pos == sizeof(empty_bcj_lzma2));
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expect(out_pos == 0);
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}
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extern int
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main(void)
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{
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compress();
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decompress();
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decompress_empty();
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return 0;
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}
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