2014-06-24 20:42:29 +02:00
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/***
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This file is part of systemd
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Copyright 2014 Ronny Chevalier
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "compress.h"
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#include "util.h"
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#include "macro.h"
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2014-07-04 04:42:22 +02:00
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#ifdef HAVE_XZ
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# define XZ_OK 0
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#else
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# define XZ_OK -EPROTONOSUPPORT
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#endif
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2014-07-08 09:22:25 +02:00
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#ifdef HAVE_LZ4
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2014-07-04 04:42:22 +02:00
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# define LZ4_OK 0
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#else
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# define LZ4_OK -EPROTONOSUPPORT
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#endif
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typedef int (compress_blob_t)(const void *src, uint64_t src_size,
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void *dst, uint64_t *dst_size);
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typedef int (decompress_blob_t)(const void *src, uint64_t src_size,
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void **dst, uint64_t *dst_alloc_size,
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uint64_t* dst_size, uint64_t dst_max);
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typedef int (decompress_sw_t)(const void *src, uint64_t src_size,
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void **buffer, uint64_t *buffer_size,
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const void *prefix, uint64_t prefix_len,
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uint8_t extra);
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typedef int (compress_stream_t)(int fdf, int fdt, off_t max_bytes);
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typedef int (decompress_stream_t)(int fdf, int fdt, off_t max_size);
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static void test_compress_decompress(int compression,
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compress_blob_t compress,
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decompress_blob_t decompress) {
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2014-06-24 20:42:29 +02:00
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char text[] = "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
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"foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
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char compressed[512];
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uint64_t csize = 512;
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uint64_t usize = 0;
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2014-07-04 04:42:22 +02:00
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_cleanup_free_ char *decompressed = NULL;
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int r;
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log_info("/* testing %s blob compression/decompression */",
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object_compressed_to_string(compression));
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r = compress(text, sizeof(text), compressed, &csize);
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assert(r == 0);
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r = decompress(compressed, csize,
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(void **) &decompressed, &usize, &csize, 0);
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assert(r == 0);
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assert_se(decompressed);
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assert_se(streq(decompressed, text));
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r = decompress("garbage", 7,
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(void **) &decompressed, &usize, &csize, 0);
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assert(r < 0);
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/* make sure to have the minimal lz4 compressed size */
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r = decompress("00000000\1g", 9,
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(void **) &decompressed, &usize, &csize, 0);
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assert(r < 0);
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r = decompress("\100000000g", 9,
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(void **) &decompressed, &usize, &csize, 0);
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assert(r < 0);
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memzero(decompressed, usize);
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2014-06-24 20:42:29 +02:00
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}
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2014-07-04 04:42:22 +02:00
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static void test_decompress_startswith(int compression,
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compress_blob_t compress,
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decompress_sw_t decompress_sw) {
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2014-06-24 20:42:29 +02:00
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char text[] = "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
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"foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
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char compressed[512];
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uint64_t csize = 512;
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uint64_t usize = 0;
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2014-07-04 04:42:22 +02:00
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_cleanup_free_ char *decompressed = NULL;
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log_info("/* testing decompress_startswith with %s */",
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object_compressed_to_string(compression));
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assert_se(compress(text, sizeof(text), compressed, &csize) == 0);
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assert_se(decompress_sw(compressed,
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csize,
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(void **) &decompressed,
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&usize,
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"foofoofoofoo", 12, ' ') > 0);
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assert_se(decompress_sw(compressed,
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csize,
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(void **) &decompressed,
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&usize,
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"foofoofoofoo", 12, 'w') == 0);
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assert_se(decompress_sw(compressed,
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csize,
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(void **) &decompressed,
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&usize,
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"barbarbar", 9, ' ') == 0);
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assert_se(decompress_sw(compressed,
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csize,
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(void **) &decompressed,
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&usize,
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"foofoofoofoo", 12, ' ') > 0);
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2014-06-24 20:42:29 +02:00
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}
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2014-07-04 04:42:22 +02:00
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static void test_compress_stream(int compression,
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const char* cat,
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compress_stream_t compress,
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decompress_stream_t decompress,
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const char *srcfile) {
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2014-06-25 03:24:46 +02:00
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_cleanup_close_ int src = -1, dst = -1, dst2 = -1;
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char pattern[] = "/tmp/systemd-test.xz.XXXXXX",
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pattern2[] = "/tmp/systemd-test.xz.XXXXXX";
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int r;
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2014-07-04 04:42:22 +02:00
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_cleanup_free_ char *cmd = NULL, *cmd2;
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2014-06-25 03:24:46 +02:00
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struct stat st = {};
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2014-07-04 04:42:22 +02:00
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log_debug("/* testing %s compression */",
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object_compressed_to_string(compression));
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2014-06-25 03:24:46 +02:00
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log_debug("/* create source from %s */", srcfile);
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assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0);
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log_debug("/* test compression */");
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assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0);
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2014-07-04 04:42:22 +02:00
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assert(compress(src, dst, -1) == 0);
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2014-06-25 03:24:46 +02:00
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2014-07-04 04:42:22 +02:00
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if (cat) {
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assert_se(asprintf(&cmd, "%s %s | diff %s -", cat, pattern, srcfile) > 0);
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assert(system(cmd) == 0);
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}
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log_debug("/* test decompression */");
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assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0);
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assert_se(stat(srcfile, &st) == 0);
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assert_se(lseek(dst, 0, SEEK_SET) == 0);
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2014-07-04 04:42:22 +02:00
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r = decompress(dst, dst2, st.st_size);
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2014-06-25 03:24:46 +02:00
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assert(r == 0);
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assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0);
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assert_se(system(cmd2) == 0);
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log_debug("/* test faulty decompression */");
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assert_se(lseek(dst, 1, SEEK_SET) == 1);
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2014-07-04 04:42:22 +02:00
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r = decompress(dst, dst2, st.st_size);
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2014-06-25 03:24:46 +02:00
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assert(r == -EBADMSG);
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assert_se(lseek(dst, 0, SEEK_SET) == 0);
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assert_se(lseek(dst2, 0, SEEK_SET) == 0);
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2014-07-04 04:42:22 +02:00
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r = decompress(dst, dst2, st.st_size - 1);
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assert(r == -EFBIG);
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2014-06-25 03:24:46 +02:00
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assert_se(unlink(pattern) == 0);
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assert_se(unlink(pattern2) == 0);
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}
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2014-06-24 20:42:29 +02:00
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int main(int argc, char *argv[]) {
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2014-06-25 03:24:46 +02:00
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log_set_max_level(LOG_DEBUG);
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2014-07-04 04:42:22 +02:00
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#ifdef HAVE_XZ
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test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz);
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test_decompress_startswith(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_startswith_xz);
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test_compress_stream(OBJECT_COMPRESSED_XZ, "xzcat",
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compress_stream_xz, decompress_stream_xz, argv[0]);
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#else
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log_info("/* XZ test skipped */");
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#endif
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#ifdef HAVE_LZ4
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test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4);
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test_decompress_startswith(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_startswith_lz4);
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/* Produced stream is not compatible with lz4 binary, skip lz4cat check. */
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test_compress_stream(OBJECT_COMPRESSED_LZ4, NULL,
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compress_stream_lz4, decompress_stream_lz4, argv[0]);
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#else
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log_info("/* LZ4 test skipped */");
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#endif
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2014-06-24 20:42:29 +02:00
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return 0;
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}
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