[pcsx_rearmed.git] / deps / libchdr / deps / zstd-1.5.5 / tests / seqgen.h

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * 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 */
Commit	Line	Data
648db22b	1	/*
	2	* Copyright (c) Meta Platforms, Inc. and affiliates.
	3	* All rights reserved.
	4	*
	5	* This source code is licensed under both the BSD-style license (found in the
	6	* LICENSE file in the root directory of this source tree) and the GPLv2 (found
	7	* in the COPYING file in the root directory of this source tree).
	8	* You may select, at your option, one of the above-listed licenses.
	9	*/
	10
	11	#ifndef SEQGEN_H
	12	#define SEQGEN_H
	13
	14	#define XXH_STATIC_LINKING_ONLY
	15
	16	#include "xxhash.h"
	17	#include <stddef.h> /* size_t */
	18
	19	typedef enum {
	20	SEQ_gen_ml = 0,
	21	SEQ_gen_ll,
	22	SEQ_gen_of,
	23	SEQ_gen_max /* Must be the last value */
	24	} SEQ_gen_type;
	25
	26	/* Internal state, do not use */
	27	typedef struct {
	28	XXH64_state_t xxh; /* xxh state for all the data produced so far (seed=0) */
	29	unsigned seed;
	30	int state; /* enum to control state machine (clean=0) */
	31	unsigned saved;
	32	size_t bytesLeft;
	33	} SEQ_stream;
	34
	35	SEQ_stream SEQ_initStream(unsigned seed);
	36
	37	typedef struct {
	38	void* dst;
	39	size_t size;
	40	size_t pos;
	41	} SEQ_outBuffer;
	42
	43	/* Returns non-zero until the current type/value has been generated.
	44	* Must pass the same type/value until it returns 0.
	45	*
	46	* Recommended to pick a value in the middle of the range you want, since there
	47	* may be some noise that causes actual results to be slightly different.
	48	* We try to be more accurate for smaller values.
	49	*
	50	* NOTE: Very small values don't work well (< 6).
	51	*/
	52	size_t SEQ_gen(SEQ_stream* stream, SEQ_gen_type type, unsigned value,
	53	SEQ_outBuffer* out);
	54
	55	/* Returns the xxhash of the data produced so far */
	56	XXH64_hash_t SEQ_digest(SEQ_stream const* stream);
	57
	58	#endif /* SEQGEN_H */