Commit | Line | Data |
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22a52da1 | 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library 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 GNU | |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd JB |
19 | \f |
20 | ||
a0599745 MD |
21 | #include "libguile/_scm.h" |
22 | #include "libguile/eq.h" | |
23 | #include "libguile/ports.h" | |
24 | #include "libguile/root.h" | |
25 | #include "libguile/smob.h" | |
86d31dfe | 26 | #include "libguile/deprecation.h" |
a0599745 MD |
27 | |
28 | #include "libguile/validate.h" | |
29 | #include "libguile/variable.h" | |
0f2d19dd | 30 | \f |
1cc91f1b | 31 | |
dbf5dfb3 MV |
32 | void |
33 | scm_i_variable_print (SCM exp, SCM port, scm_print_state *pstate) | |
0f2d19dd | 34 | { |
b7f3516f | 35 | scm_puts ("#<variable ", port); |
22a52da1 | 36 | scm_intprint (SCM_UNPACK (exp), 16, port); |
2b1d120c | 37 | scm_puts (" value: ", port); |
86d31dfe | 38 | scm_iprin1 (SCM_VARIABLE_REF (exp), port, pstate); |
b7f3516f | 39 | scm_putc('>', port); |
0f2d19dd JB |
40 | } |
41 | ||
0f2d19dd JB |
42 | \f |
43 | ||
0f2d19dd | 44 | static SCM |
86d31dfe | 45 | make_variable (SCM init) |
0f2d19dd | 46 | { |
228a24ef | 47 | return scm_cell (scm_tc7_variable, SCM_UNPACK (init)); |
0f2d19dd JB |
48 | } |
49 | ||
86d31dfe MV |
50 | SCM_DEFINE (scm_make_variable, "make-variable", 1, 0, 0, |
51 | (SCM init), | |
9401323e | 52 | "Return a variable initialized to value @var{init}.") |
1bbd0b84 | 53 | #define FUNC_NAME s_scm_make_variable |
0f2d19dd | 54 | { |
86d31dfe | 55 | return make_variable (init); |
0f2d19dd | 56 | } |
1bbd0b84 | 57 | #undef FUNC_NAME |
0f2d19dd JB |
58 | |
59 | ||
86d31dfe MV |
60 | SCM_DEFINE (scm_make_undefined_variable, "make-undefined-variable", 0, 0, 0, |
61 | (), | |
9401323e | 62 | "Return a variable that is initially unbound.") |
1bbd0b84 | 63 | #define FUNC_NAME s_scm_make_undefined_variable |
0f2d19dd | 64 | { |
86d31dfe | 65 | return make_variable (SCM_UNDEFINED); |
0f2d19dd | 66 | } |
1bbd0b84 | 67 | #undef FUNC_NAME |
0f2d19dd JB |
68 | |
69 | ||
3b3b36dd | 70 | SCM_DEFINE (scm_variable_p, "variable?", 1, 0, 0, |
d727c64b | 71 | (SCM obj), |
03ba3d5b | 72 | "Return @code{#t} iff @var{obj} is a variable object, else\n" |
9401323e | 73 | "return @code{#f}.") |
1bbd0b84 | 74 | #define FUNC_NAME s_scm_variable_p |
0f2d19dd | 75 | { |
7888309b | 76 | return scm_from_bool (SCM_VARIABLEP (obj)); |
0f2d19dd | 77 | } |
1bbd0b84 | 78 | #undef FUNC_NAME |
0f2d19dd JB |
79 | |
80 | ||
3b3b36dd | 81 | SCM_DEFINE (scm_variable_ref, "variable-ref", 1, 0, 0, |
d727c64b | 82 | (SCM var), |
03ba3d5b MG |
83 | "Dereference @var{var} and return its value.\n" |
84 | "@var{var} must be a variable object; see @code{make-variable}\n" | |
85 | "and @code{make-undefined-variable}.") | |
1bbd0b84 | 86 | #define FUNC_NAME s_scm_variable_ref |
0f2d19dd | 87 | { |
86d31dfe | 88 | SCM val; |
4fd1f652 | 89 | SCM_VALIDATE_VARIABLE (1, var); |
86d31dfe MV |
90 | val = SCM_VARIABLE_REF (var); |
91 | if (val == SCM_UNDEFINED) | |
1afff620 | 92 | SCM_MISC_ERROR ("variable is unbound: ~S", scm_list_1 (var)); |
86d31dfe | 93 | return val; |
0f2d19dd | 94 | } |
1bbd0b84 | 95 | #undef FUNC_NAME |
0f2d19dd | 96 | |
3b3b36dd | 97 | SCM_DEFINE (scm_variable_set_x, "variable-set!", 2, 0, 0, |
d727c64b | 98 | (SCM var, SCM val), |
03ba3d5b MG |
99 | "Set the value of the variable @var{var} to @var{val}.\n" |
100 | "@var{var} must be a variable object, @var{val} can be any\n" | |
9401323e | 101 | "value. Return an unspecified value.") |
1bbd0b84 | 102 | #define FUNC_NAME s_scm_variable_set_x |
0f2d19dd | 103 | { |
22a52da1 | 104 | SCM_VALIDATE_VARIABLE (1, var); |
86d31dfe | 105 | SCM_VARIABLE_SET (var, val); |
0f2d19dd JB |
106 | return SCM_UNSPECIFIED; |
107 | } | |
1bbd0b84 | 108 | #undef FUNC_NAME |
0f2d19dd | 109 | |
3b3b36dd | 110 | SCM_DEFINE (scm_variable_bound_p, "variable-bound?", 1, 0, 0, |
d727c64b | 111 | (SCM var), |
03ba3d5b | 112 | "Return @code{#t} iff @var{var} is bound to a value.\n" |
9401323e | 113 | "Throws an error if @var{var} is not a variable object.") |
1bbd0b84 | 114 | #define FUNC_NAME s_scm_variable_bound_p |
0f2d19dd | 115 | { |
22a52da1 | 116 | SCM_VALIDATE_VARIABLE (1, var); |
7888309b | 117 | return scm_from_bool (SCM_VARIABLE_REF (var) != SCM_UNDEFINED); |
0f2d19dd | 118 | } |
1bbd0b84 | 119 | #undef FUNC_NAME |
0f2d19dd | 120 | |
1cc91f1b | 121 | |
0f2d19dd JB |
122 | void |
123 | scm_init_variable () | |
0f2d19dd | 124 | { |
a0599745 | 125 | #include "libguile/variable.x" |
0f2d19dd JB |
126 | } |
127 | ||
89e00824 ML |
128 | /* |
129 | Local Variables: | |
130 | c-file-style: "gnu" | |
131 | End: | |
132 | */ |