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* libguile/bitvectors.c: * libguile/bitvectors.h: * libguile/bytevectors.c: * libguile/bytevectors.h: * libguile/chars.c: * libguile/continuations.c: * libguile/control.c: * libguile/conv-integer.i.c: * libguile/conv-uinteger.i.c: * libguile/dynstack.c: * libguile/dynstack.h: * libguile/foreign.c: * libguile/frames.c: * libguile/frames.h: * libguile/gc-inline.h: * libguile/gc.h: * libguile/gsubr.c: * libguile/gsubr.h: * libguile/hash.c: * libguile/i18n.c: * libguile/instructions.c: * libguile/intrinsics.c: * libguile/intrinsics.h: * libguile/loader.c: * libguile/loader.h: * libguile/numbers.c: * libguile/numbers.h: * libguile/pairs.c: * libguile/ports-internal.h: * libguile/ports.c: * libguile/ports.h: * libguile/posix.c: * libguile/print.c: * libguile/print.h: * libguile/programs.c: * libguile/programs.h: * libguile/r6rs-ports.c: * libguile/random.c: * libguile/random.h: * libguile/scm.h: * libguile/socket.c: * libguile/srfi-4.c: * libguile/srfi-4.h: * libguile/stacks.c: * libguile/stime.c: * libguile/strings.c: * libguile/struct.c: * libguile/struct.h: * libguile/symbols.c: * libguile/threads.c: * libguile/threads.h: * libguile/uniform.c: * libguile/vm-engine.c: * libguile/vm.c: * libguile/vm.h: * libguile/vports.c: * test-suite/standalone/test-conversion.c: * test-suite/standalone/test-ffi-lib.c: * test-suite/standalone/test-scm-take-u8vector.c: * test-suite/standalone/test-srfi-4.c: Replace e.g. scm_t_uint8 with uint8_t.
102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
#ifndef SCM_RANDOM_H
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#define SCM_RANDOM_H
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/* Copyright 1999-2001,2006,2008,2010,2018
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Free Software Foundation, Inc.
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This file is part of Guile.
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Guile is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by 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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Guile is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with Guile. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <libguile/error.h>
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/*
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* A plugin interface for RNGs
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*
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* Using this interface, it is possible for the application to tell
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* libguile to use a different RNG. This is desirable if it is
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* necessary to use the same RNG everywhere in the application in
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* order to prevent interference, if the application uses RNG
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* hardware, or if the application has special demands on the RNG.
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*
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* Look how the default generator is "plugged in" in scm_init_random().
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*/
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typedef struct scm_t_rstate {
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struct scm_t_rng *rng;
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double normal_next; /* For scm_c_normal01 */
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/* Custom fields follow here */
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} scm_t_rstate;
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typedef struct scm_t_rng {
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size_t rstate_size; /* size of random state */
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uint32_t (*random_bits) (scm_t_rstate *state); /* gives 32 random bits */
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void (*init_rstate) (scm_t_rstate *state, const char *seed, int n);
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scm_t_rstate *(*copy_rstate) (scm_t_rstate *state);
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void (*from_datum) (scm_t_rstate *state, SCM datum);
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SCM (*to_datum) (scm_t_rstate *state);
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} scm_t_rng;
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SCM_API scm_t_rng scm_the_rng;
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/*
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* Random number library functions
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*/
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SCM_API scm_t_rstate *scm_c_make_rstate (const char *, int);
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SCM_API scm_t_rstate *scm_c_rstate_from_datum (SCM datum);
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SCM_API scm_t_rstate *scm_c_default_rstate (void);
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#define scm_c_uniform32(RSTATE) ((RSTATE)->rng->random_bits (RSTATE))
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SCM_API double scm_c_uniform01 (scm_t_rstate *);
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SCM_API double scm_c_normal01 (scm_t_rstate *);
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SCM_API double scm_c_exp1 (scm_t_rstate *);
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SCM_API uint32_t scm_c_random (scm_t_rstate *, uint32_t m);
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SCM_API uint64_t scm_c_random64 (scm_t_rstate *state, uint64_t m);
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SCM_API SCM scm_c_random_bignum (scm_t_rstate *, SCM m);
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/*
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* Scheme level interface
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*/
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SCM_API scm_t_bits scm_tc16_rstate;
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#define SCM_RSTATEP(obj) SCM_SMOB_PREDICATE (scm_tc16_rstate, obj)
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#define SCM_RSTATE(obj) ((scm_t_rstate *) SCM_SMOB_DATA (obj))
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#define SCM_VALIDATE_RSTATE(pos, v) \
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SCM_MAKE_VALIDATE_MSG (pos, v, RSTATEP, "random-generator-state")
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SCM_API unsigned char scm_masktab[256];
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SCM_API SCM scm_var_random_state;
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SCM_API SCM scm_random (SCM n, SCM state);
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SCM_API SCM scm_copy_random_state (SCM state);
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SCM_API SCM scm_seed_to_random_state (SCM seed);
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SCM_API SCM scm_datum_to_random_state (SCM datum);
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SCM_API SCM scm_random_state_to_datum (SCM state);
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SCM_API SCM scm_random_state_from_platform (void);
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SCM_API SCM scm_random_uniform (SCM state);
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SCM_API SCM scm_random_solid_sphere_x (SCM v, SCM state);
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SCM_API SCM scm_random_hollow_sphere_x (SCM v, SCM state);
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SCM_API SCM scm_random_normal (SCM state);
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SCM_API SCM scm_random_normal_vector_x (SCM v, SCM state);
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SCM_API SCM scm_random_exp (SCM state);
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SCM_INTERNAL void scm_init_random (void);
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SCM_INTERNAL void scm_i_random_bytes_from_platform (unsigned char *buf, size_t len);
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#endif /* SCM_RANDOM_H */
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