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- /* classes: h_files */
-
- #ifndef RANDOMH
- #define RANDOMH
- /* Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice. */
-
-
-
- #include "libguile/__scm.h"
-
-
- /*
- * A plugin interface for RNGs
- *
- * Using this interface, it is possible for the application to tell
- * libguile to use a different RNG. This is desirable if it is
- * necessary to use the same RNG everywhere in the application in
- * order to prevent interference, if the application uses RNG
- * hardware, or if the application has special demands on the RNG.
- *
- * Look how the default generator is "plugged in" in scm_init_random().
- */
-
- typedef struct scm_t_rstate {
- int reserved0;
- double reserved1;
- /* Custom fields follow here */
- } scm_t_rstate;
-
- typedef struct scm_t_rng {
- size_t rstate_size; /* size of random state */
- unsigned long (*random_bits) (scm_t_rstate *state); /* gives 32 random bits */
- void (*init_rstate) (scm_t_rstate *state, char *seed, int n);
- scm_t_rstate *(*copy_rstate) (scm_t_rstate *state);
- } scm_t_rng;
-
- extern scm_t_rng scm_the_rng;
-
-
- /*
- * Default RNG
- */
- typedef struct scm_t_i_rstate {
- scm_t_rstate rstate;
- unsigned long w;
- unsigned long c;
- } scm_t_i_rstate;
-
- #if (SCM_DEBUG_DEPRECATED == 0)
- # define scm_rstate scm_t_rstate
- # define scm_rng scm_t_rng
- # define scm_i_rstate scm_t_i_rstate
- #endif
-
- extern unsigned long scm_i_uniform32 (scm_t_i_rstate *);
- extern void scm_i_init_rstate (scm_t_i_rstate *, char *seed, int n);
- extern scm_t_i_rstate *scm_i_copy_rstate (scm_t_i_rstate *);
-
-
- /*
- * Random number library functions
- */
- extern scm_t_rstate *scm_c_make_rstate (char *, int);
- extern scm_t_rstate *scm_c_default_rstate (void);
- #define scm_c_uniform32(RSTATE) scm_the_rng.random_bits (RSTATE)
- extern double scm_c_uniform01 (scm_t_rstate *);
- extern double scm_c_normal01 (scm_t_rstate *);
- extern double scm_c_exp1 (scm_t_rstate *);
- extern unsigned long scm_c_random (scm_t_rstate *, unsigned long m);
- extern SCM scm_c_random_bignum (scm_t_rstate *, SCM m);
-
-
- /*
- * Scheme level interface
- */
- extern scm_t_bits scm_tc16_rstate;
- #define SCM_RSTATEP(obj) SCM_TYP16_PREDICATE (scm_tc16_rstate, obj)
- #define SCM_RSTATE(obj) ((scm_t_rstate *) SCM_CELL_WORD_1 (obj))
-
- extern unsigned char scm_masktab[256];
-
- extern SCM scm_var_random_state;
- extern SCM scm_random (SCM n, SCM state);
- extern SCM scm_copy_random_state (SCM state);
- extern SCM scm_seed_to_random_state (SCM seed);
- extern SCM scm_random_uniform (SCM state);
- extern SCM scm_random_solid_sphere_x (SCM v, SCM state);
- extern SCM scm_random_hollow_sphere_x (SCM v, SCM state);
- extern SCM scm_random_normal (SCM state);
- extern SCM scm_random_normal_vector_x (SCM v, SCM state);
- extern SCM scm_random_exp (SCM state);
- extern void scm_init_random (void);
-
- #endif /* RANDOMH */
-
- /*
- Local Variables:
- c-file-style: "gnu"
- End:
- */
-