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- /*
- (c) Copyright Taiichi Yuasa and Masami Hagiya, 1984. All rights reserved.
- Copying of this file is authorized to users who have executed the true and
- proper "License Agreement for Kyoto Common LISP" with SIGLISP.
- */
-
- /*
- Random numbers
- */
-
- #include "include.h"
- #include "num_include.h"
-
- #ifdef AOSVS
-
- #endif
-
- object
- rando(x, rs)
- object x, rs;
- {
- enum type tx;
- object z;
- double d;
-
- tx = type_of(x);
- if (number_compare(x, small_fixnum(0)) != 1)
- FEwrong_type_argument(TSnon_negative_integer, x);
- d = (double)(rs->rnd.rnd_value>>1) / (4294967296.0/2.0);
- d = number_to_double(x) * d;
- if (tx == t_fixnum) {
- z = make_fixnum((int)d);
- return(z);
- } else if (tx == t_bignum) {
- z = double_to_integer(d);
- return(z);
- } else if (tx == t_shortfloat) {
- z = alloc_object(t_shortfloat);
- sf(z) = (float)d;
- return(z);
- } else if (tx == t_longfloat) {
- z = alloc_object(t_longfloat);
- lf(z) = d;
- return(z);
- } else
- FEerror("~S is not an integer nor a floating-point number.",
- 1, x);
- }
-
- object
- make_random_state(rs)
- object rs;
- {
- object z;
- #ifdef AOSVS
-
- #endif
-
- if (rs == Cnil) {
- z = alloc_object(t_random);
- z->rnd.rnd_value = symbol_value(Vrandom_state)->rnd.rnd_value;
- return(z);
- } else if (rs == Ct) {
- z = alloc_object(t_random);
- #ifdef UNIX
- z->rnd.rnd_value = time(0);
- #endif
- #ifdef AOSVS
-
-
-
-
- #endif
- return(z);
- } else if (type_of(rs) != t_random)
- FEwrong_type_argument(Srandom_state, rs);
- else {
- z =alloc_object(t_random);
- z->rnd.rnd_value = rs->rnd.rnd_value;
- return(z);
- }
- }
-
- advance_random_state(rs)
- object rs;
- {
- rs->rnd.rnd_value
- = rs->rnd.rnd_value
- + (rs->rnd.rnd_value<<2)
- + (rs->rnd.rnd_value<<17)
- + (rs->rnd.rnd_value<<27);
- }
-
-
- Lrandom()
- {
- int j;
- object x;
- object rs;
-
- j = vs_top - vs_base;
- if (j == 1)
- vs_push(symbol_value(Vrandom_state));
- check_arg(2);
- check_type_random_state(&vs_base[1]);
- advance_random_state(vs_base[1]);
- x = rando(vs_base[0], vs_base[1]);
- vs_top = vs_base;
- vs_push(x);
- }
-
- Lmake_random_state()
- {
- int j;
- object x;
-
- j = vs_top - vs_base;
- if (j == 0)
- vs_push(Cnil);
- check_arg(1);
- x = make_random_state(vs_head);
- vs_top = vs_base;
- vs_push(x);
- }
-
- Lrandom_state_p()
- {
- check_arg(1);
- if (type_of(vs_pop) == t_random)
- vs_push(Ct);
- else
- vs_push(Cnil);
- }
-
- init_num_rand()
- {
- Vrandom_state = make_special("*RANDOM-STATE*",
- make_random_state(Ct));
-
- make_function("RANDOM", Lrandom);
- make_function("MAKE-RANDOM-STATE", Lmake_random_state);
- make_function("RANDOM-STATE-P", Lrandom_state_p);
- }
-