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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/zstd/tests/seqgen.h | |
parent | Initial commit. (diff) | |
download | ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/zstd/tests/seqgen.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/zstd/tests/seqgen.h b/src/zstd/tests/seqgen.h new file mode 100644 index 000000000..808099ba9 --- /dev/null +++ b/src/zstd/tests/seqgen.h @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2017-2020, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under both the BSD-style license (found in the + * LICENSE file in the root directory of this source tree) and the GPLv2 (found + * in the COPYING file in the root directory of this source tree). + * You may select, at your option, one of the above-listed licenses. + */ + +#ifndef SEQGEN_H +#define SEQGEN_H + +#define XXH_STATIC_LINKING_ONLY + +#include "xxhash.h" +#include <stddef.h> /* size_t */ + +typedef enum { + SEQ_gen_ml = 0, + SEQ_gen_ll, + SEQ_gen_of, + SEQ_gen_max /* Must be the last value */ +} SEQ_gen_type; + +/* Internal state, do not use */ +typedef struct { + XXH64_state_t xxh; /* xxh state for all the data produced so far (seed=0) */ + unsigned seed; + int state; /* enum to control state machine (clean=0) */ + unsigned saved; + size_t bytesLeft; +} SEQ_stream; + +SEQ_stream SEQ_initStream(unsigned seed); + +typedef struct { + void* dst; + size_t size; + size_t pos; +} SEQ_outBuffer; + +/* Returns non-zero until the current type/value has been generated. + * Must pass the same type/value until it returns 0. + * + * Recommended to pick a value in the middle of the range you want, since there + * may be some noise that causes actual results to be slightly different. + * We try to be more accurate for smaller values. + * + * NOTE: Very small values don't work well (< 6). + */ +size_t SEQ_gen(SEQ_stream* stream, SEQ_gen_type type, unsigned value, + SEQ_outBuffer* out); + +/* Returns the xxhash of the data produced so far */ +XXH64_hash_t SEQ_digest(SEQ_stream const* stream); + +#endif /* SEQGEN_H */ |