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86 lines
3.2 KiB
C
86 lines
3.2 KiB
C
/*
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Copyright (C) 2011 Statoil ASA, Norway.
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The file 'rng.h' is part of ERT - Ensemble based Reservoir Tool.
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ERT is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ERT is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
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for more details.
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*/
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#ifndef ERT_RNG_H
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#define ERT_RNG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include <ert/util/type_macros.h>
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typedef enum {
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INIT_DEFAULT = 0, /* The rng is initialized with the default seed values. */
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INIT_CLOCK = 1, /* Four random seeds are calculated with the util_clock_seed() function. */
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INIT_DEV_RANDOM = 2, /* Random content is read with the function util_fread_dev_random(). */
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INIT_DEV_URANDOM = 3 /* Random content is read with the function util_fread_dev_urandom(). */
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} rng_init_mode;
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typedef enum {
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MZRAN = 1
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} rng_alg_type;
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typedef unsigned int ( rng_forward_ftype ) ( void * );
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typedef void ( rng_set_state_ftype ) ( void * , const char * );
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typedef void ( rng_get_state_ftype ) ( void * , char * );
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typedef void * ( rng_alloc_ftype ) ( void );
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typedef void ( rng_free_ftype ) ( void * );
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typedef void ( rng_fscanf_ftype ) ( void * , FILE * );
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typedef void ( rng_fprintf_ftype ) ( const void * , FILE * );
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typedef struct rng_struct rng_type;
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rng_type * rng_alloc( rng_alg_type type , rng_init_mode init_mode );
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void rng_free( rng_type * rng);
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void rng_free( rng_type * rng);
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unsigned int rng_forward( rng_type * rng );
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double rng_get_double( rng_type * rng);
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void rng_rng_init( rng_type * rng , rng_type * seed_src);
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void rng_init( rng_type * rng , rng_init_mode init_mode );
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rng_alg_type rng_get_type( const rng_type * rng );
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void rng_fprintf_state( rng_type * rng , FILE * stream );
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void rng_fscanf_state( rng_type * rng , FILE * stream );
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int rng_state_size( const rng_type * rng );
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void rng_save_state( rng_type * rng , const char * filename);
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void rng_load_state( rng_type * rng , const char * filename);
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void rng_set_state( rng_type * rng , const char * state);
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void rng_get_state( const rng_type * rng , char * state);
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unsigned int rng_forward( rng_type * rng );
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double rng_get_double( rng_type * rng );
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int rng_get_int( rng_type * rng , int max_value );
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unsigned int rng_get_max_int(const rng_type * rng);
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double rng_std_normal( rng_type * rng );
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void rng_shuffle_int( rng_type * rng , int * data , size_t num_elements);
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void rng_shuffle( rng_type * rng , char * data , size_t element_size , size_t num_elements);
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void rng_free__( void * arg);
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UTIL_SAFE_CAST_HEADER( rng );
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#ifdef __cplusplus
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}
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#endif
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#endif
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