pcg_basic.h

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/*
 * PCG Random Number Generation for C.
 *
 * Copyright 2014 Melissa O'Neill <oneill@pcg-random.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * For additional information about the PCG random number generation scheme,
 * including its license and other licensing options, visit
 *
 *     http://www.pcg-random.org
 */
 
#ifndef PCG_BASIC_H_
#define PCG_BASIC_H_
 
#if defined(UNDER_CE) || !defined(_MSC_VER) || _MSC_VER >= 1800
# include <stdint.h>
#else
# include "ms_stdint.h"
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct pcg_state_setseq_64 {
    uint64_t state;  /* RNG state.  All values are possible. */
    uint64_t inc;    /* Controls which RNG sequence (stream) is selected. Must
                      * *always* be odd. */
} pcg32_random_t;
 
#define PCG32_INITIALIZER { 0x853c49e6748fea9bULL, 0xda3e39cb94b95bdbULL }
 
void pcg32_srandom_r(pcg32_random_t* rng, uint64_t initial_state, uint64_t initseq);
uint32_t pcg32_random_r(pcg32_random_t* rng);
 
#ifdef __cplusplus
}
#endif
 
#endif /* PCG_BASIC_H_ */