#include "compress.h"

#include "util.h"

#include "macro.h"

static void test_compress_uncompress(void) {

char text[] = "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"

"foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";

char compressed[512];

uint64_t csize = 512;

uint64_t usize = 0;

_cleanup_free_ char *uncompressed = NULL;

assert_se(compress_blob(text, sizeof(text), compressed, &csize));

assert_se(uncompress_blob(compressed,

csize,

(void **) &uncompressed,

&usize, &csize, 0));

assert_se(uncompressed);

assert_se(streq(uncompressed, text));

assert_se(!uncompress_blob("garbage",

7,

(void **) &uncompressed,

&usize, &csize, 0));

}

static void test_uncompress_startswith(void) {

char text[] = "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"

"foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";

char compressed[512];

uint64_t csize = 512;

uint64_t usize = 0;

_cleanup_free_ char *uncompressed = NULL;

assert_se(compress_blob(text, sizeof(text), compressed, &csize));

assert_se(uncompress_startswith(compressed,

csize,

(void **) &uncompressed,

&usize,

"foofoofoofoo", 12, ' '));

assert_se(!uncompress_startswith(compressed,

csize,

(void **) &uncompressed,

&usize,

"foofoofoofoo", 12, 'w'));

assert_se(!uncompress_startswith(compressed,

csize,

(void **) &uncompressed,

&usize,

"barbarbar", 9, ' '));

}

static void test_compress_stream(const char *srcfile) {

_cleanup_close_ int src = -1, dst = -1, dst2 = -1;

char pattern[] = "/tmp/systemd-test.xz.XXXXXX",

pattern2[] = "/tmp/systemd-test.xz.XXXXXX";

int r;

_cleanup_free_ char *cmd, *cmd2;

struct stat st = {};

log_debug("/* create source from %s */", srcfile);

assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0);

log_debug("/* test compression */");

assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0);

r = compress_stream(src, dst, -1);

assert(r == 0);

assert_se(asprintf(&cmd, "xzcat %s | diff %s -", pattern, srcfile) > 0);

assert_se(system(cmd) == 0);

log_debug("/* test decompression */");

assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0);

assert_se(stat(srcfile, &st) == 0);

assert_se(lseek(dst, 0, SEEK_SET) == 0);

r = decompress_stream(dst, dst2, st.st_size);

assert(r == 0);

assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0);

assert_se(system(cmd2) == 0);

log_debug("/* test faulty decompression */");

assert_se(lseek(dst, 1, SEEK_SET) == 1);

r = decompress_stream(dst, dst2, st.st_size);

assert(r == -EBADMSG);

assert_se(lseek(dst, 0, SEEK_SET) == 0);

assert_se(lseek(dst2, 0, SEEK_SET) == 0);

r = decompress_stream(dst, dst2, st.st_size - 1);

assert(r == -E2BIG);

assert_se(unlink(pattern) == 0);

assert_se(unlink(pattern2) == 0);

}

int main(int argc, char *argv[]) {

log_set_max_level(LOG_DEBUG);

test_compress_uncompress();

test_uncompress_startswith();

test_compress_stream(argv[0]);

return 0;

}