ed9b57e2129623bcc3c6333550ecdca40b4f7627
1 /* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2, or (at your option)
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this software; see the file COPYING. If not, write to
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
43 /* gh_test_repl -- a program that demonstrates starting Guile, adding
44 some privmitive procedures and entering a REPL form C */
51 SCM
c_factorial (SCM s_n
);
53 SCM
c_vector_test (SCM s_length
);
55 /* the gh_enter() routine, the standard entryp point for the gh_
56 interface, makes you use a separate main function */
58 main_prog (int argc
, char *argv
[])
62 gh_eval_str ("(display \"hello guile\n\")");
64 gh_eval_str ("(define (square x) (* x x))");
65 gh_eval_str ("(define (fact n) (if (= n 1) 1 (* n (fact (- n 1)))))");
67 gh_eval_str ("(display (square 9)) (newline)");
68 gh_eval_str ("(display (fact 100)) (newline)");
70 gh_eval_str ("(define s \"A string\")");
71 gh_eval_str ("(define p '(A . pair))");
72 gh_eval_str ("(display s)");
73 gh_eval_str ("(display p)");
74 gh_eval_str ("(display (string? s))");
75 gh_eval_str ("(display (pair? s))");
77 /* now define some new primitives in C */
78 cf
= gh_new_procedure1_0 ("c-factorial", c_factorial
);
79 gh_new_procedure1_0 ("c-sin", c_sin
);
80 gh_new_procedure1_0 ("c-vector-test", c_vector_test
);
82 /* now try some (eval ...) action from C */
85 l
= gh_cons (gh_str02scm ("hello world"), l
);
86 l
= gh_cons (gh_symbol2scm ("'display"), l
);
92 a_string
= gh_str02scm ("A string");
94 printf ("testing the predicates for pair? and string?\n");
95 printf ("gh_pair_p(a_string) is %d, gh_string_p(a_string) is %d\n",
96 gh_pair_p (a_string
), gh_string_p (a_string
));
99 printf ("testing the predicates for procedure? and vector?\n");
100 printf ("gh_procedure_p(c_factorial) is %d, gh_vector_p(c_factorial) is %d\n",
101 gh_procedure_p (cf
), gh_vector_p (cf
));
102 gh_eval_str("(c-vector-test 200)");
104 gh_repl (argc
, argv
);
108 main (int argc
, char *argv
[])
110 gh_enter (argc
, argv
, main_prog
);
115 c_factorial (SCM s_n
)
118 unsigned long result
= 1;
120 n
= gh_scm2ulong (s_n
);
122 for (i
= 1; i
<= n
; ++i
)
126 return gh_ulong2scm (result
);
129 /* a sin routine in C, callable from scheme. it is named c_sin() to
130 distinguish it from the default scheme sin function */
134 double x
= gh_scm2double (s_x
);
136 return gh_double2scm (sin (x
));
139 /* play around with vectors in guile: this routine creates a vector of
140 the given length, initializes it all to zero except element 2 which
143 c_vector_test (SCM s_length
)
146 unsigned long c_length
;
148 c_length
= gh_scm2ulong (s_length
);
149 printf ("VECTOR test -- requested length for vector: %ld", c_length
);
151 /* create a vector filled witth 0.0 entries */
152 xvec
= gh_make_vector (s_length
, gh_double2scm (0.0));
153 /* set the second element in it to some floating point value */
154 gh_vector_set_x (xvec
, gh_int2scm(2), gh_double2scm (1.9));
156 /* I think I can use == because Scheme's doubles should be the same
157 as C doubles, with no operations in between */
158 if (gh_scm2double(gh_vector_ref (xvec
, gh_int2scm(2))) == 1.9) {
159 printf("... PASS\n");
161 printf("... FAIL\n");