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7dc6e754 | 1 | /* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc. |
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2 | * |
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) | |
6 | * any later version. | |
7 | * | |
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. | |
12 | * | |
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 | |
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15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
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17 | * |
18 | * As a special exception, Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of this library. | |
20 | * | |
21 | * The exception is that, if you link this 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 this library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by | |
31 | * Free Software Foundation as part of this library. If you copy | |
32 | * code from other releases distributed under the terms of the GPL into a copy of | |
33 | * this library, 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 such code. | |
37 | * | |
38 | * If you write modifications of your own for this library, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
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41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
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45 | \f |
46 | #include <stdio.h> | |
47 | #include "_scm.h" | |
48 | ||
1bbd0b84 | 49 | #include "scm_validate.h" |
20e6290e | 50 | #include "weaks.h" |
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51 | \f |
52 | ||
53 | ||
54 | /* {Weak Vectors} | |
55 | */ | |
56 | ||
57 | ||
a1ec6916 | 58 | SCM_DEFINE(scm_make_weak_vector, "make-weak-vector", 1, 1, 0, |
1bbd0b84 | 59 | (SCM k, SCM fill), |
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60 | "Return a weak vector with @var{size} elements. If the optional |
61 | argument @var{fill} is given, all entries in the vector will be set to | |
62 | @var{fill}. The default value for @var{fill} is the empty list.") | |
1bbd0b84 | 63 | #define FUNC_NAME s_scm_make_weak_vector |
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64 | { |
65 | SCM v; | |
250da369 | 66 | v = scm_make_vector (scm_sum (k, SCM_MAKINUM (2)), fill); |
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67 | SCM_DEFER_INTS; |
68 | SCM_SETLENGTH(v, SCM_INUM (k), scm_tc7_wvect); | |
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69 | SCM_VELTS(v)[0] = SCM_EOL; |
70 | SCM_VELTS(v)[1] = (SCM)0; | |
71 | SCM_SETVELTS(v, SCM_VELTS(v) + 2); | |
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72 | SCM_ALLOW_INTS; |
73 | return v; | |
74 | } | |
1bbd0b84 | 75 | #undef FUNC_NAME |
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76 | |
77 | ||
1bbd0b84 | 78 | SCM_REGISTER_PROC(s_list_to_weak_vector, "list->weak-vector", 1, 0, 0, scm_weak_vector); |
1cc91f1b | 79 | |
a1ec6916 | 80 | SCM_DEFINE(scm_weak_vector, "weak-vector", 0, 0, 1, |
1bbd0b84 | 81 | (SCM l), |
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82 | "@deffnx primitive list->weak-vector l |
83 | Construct a weak vector from a list: @code{weak-vector} uses the list of | |
84 | its arguments while @code{list->weak-vector} uses its only argument | |
85 | @var{l} (a list) to construct a weak vector the same way | |
86 | @code{vector->list} would.") | |
1bbd0b84 | 87 | #define FUNC_NAME s_scm_weak_vector |
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88 | { |
89 | SCM res; | |
90 | register SCM *data; | |
91 | long i; | |
92 | ||
93 | i = scm_ilength (l); | |
1bbd0b84 | 94 | SCM_ASSERT (i >= 0, l, SCM_ARG1, FUNC_NAME); |
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95 | res = scm_make_weak_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED); |
96 | data = SCM_VELTS (res); | |
97 | for (; | |
0c95b57d | 98 | i && SCM_CONSP (l); |
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99 | --i, l = SCM_CDR (l)) |
100 | *data++ = SCM_CAR (l); | |
101 | return res; | |
102 | } | |
1bbd0b84 | 103 | #undef FUNC_NAME |
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104 | |
105 | ||
a1ec6916 | 106 | SCM_DEFINE(scm_weak_vector_p, "weak-vector?", 1, 0, 0, |
1bbd0b84 | 107 | (SCM x), |
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108 | "Return @var{#t} if @var{obj} is a weak vector. Note that all weak |
109 | hashes are also weak vectors.") | |
1bbd0b84 | 110 | #define FUNC_NAME s_scm_weak_vector_p |
0f2d19dd | 111 | { |
0c95b57d | 112 | return SCM_BOOL(SCM_WVECTP (x) && !SCM_IS_WHVEC (x)); |
0f2d19dd | 113 | } |
1bbd0b84 | 114 | #undef FUNC_NAME |
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115 | |
116 | ||
117 | ||
118 | \f | |
119 | ||
120 | ||
121 | ||
a1ec6916 | 122 | SCM_DEFINE(scm_make_weak_key_hash_table, "make-weak-key-hash-table", 1, 0, 0, |
1bbd0b84 | 123 | (SCM k), |
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124 | "@deffnx primitive make-weak-value-hash-table size |
125 | @deffnx primitive make-doubly-weak-hash-table size | |
126 | Return a weak hash table with @var{size} buckets. As with any hash | |
127 | table, choosing a good size for the table requires some caution. | |
128 | ||
129 | You can modify weak hash tables in exactly the same way you would modify | |
130 | regular hash tables. (@pxref{Hash Tables})") | |
1bbd0b84 | 131 | #define FUNC_NAME s_scm_make_weak_key_hash_table |
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132 | { |
133 | SCM v; | |
47c6b75e | 134 | SCM_VALIDATE_INUM(1,k); |
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135 | v = scm_make_weak_vector (k, SCM_EOL); |
136 | SCM_ALLOW_INTS; | |
137 | SCM_VELTS (v)[-1] = 1; | |
138 | SCM_ALLOW_INTS; | |
139 | return v; | |
140 | } | |
1bbd0b84 | 141 | #undef FUNC_NAME |
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142 | |
143 | ||
a1ec6916 | 144 | SCM_DEFINE (scm_make_weak_value_hash_table, "make-weak-value-hash-table", 1, 0, 0, |
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145 | (SCM k), |
146 | "") | |
147 | #define FUNC_NAME s_scm_make_weak_value_hash_table | |
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148 | { |
149 | SCM v; | |
47c6b75e | 150 | SCM_VALIDATE_INUM(1,k); |
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151 | v = scm_make_weak_vector (k, SCM_EOL); |
152 | SCM_ALLOW_INTS; | |
153 | SCM_VELTS (v)[-1] = 2; | |
154 | SCM_ALLOW_INTS; | |
155 | return v; | |
156 | } | |
1bbd0b84 | 157 | #undef FUNC_NAME |
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158 | |
159 | ||
160 | ||
a1ec6916 | 161 | SCM_DEFINE (scm_make_doubly_weak_hash_table, "make-doubly-weak-hash-table", 1, 0, 0, |
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162 | (SCM k), |
163 | "") | |
164 | #define FUNC_NAME s_scm_make_doubly_weak_hash_table | |
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165 | { |
166 | SCM v; | |
47c6b75e | 167 | SCM_VALIDATE_INUM(1,k); |
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168 | v = scm_make_weak_vector (k, SCM_EOL); |
169 | SCM_ALLOW_INTS; | |
170 | SCM_VELTS (v)[-1] = 3; | |
171 | SCM_ALLOW_INTS; | |
172 | return v; | |
173 | } | |
1bbd0b84 | 174 | #undef FUNC_NAME |
0f2d19dd | 175 | |
a1ec6916 | 176 | SCM_DEFINE(scm_weak_key_hash_table_p, "weak-key-hash-table?", 1, 0, 0, |
1bbd0b84 | 177 | (SCM x), |
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178 | "@deffnx primitive weak-value-hash-table? obj |
179 | @deffnx primitive doubly-weak-hash-table? obj | |
180 | Return @var{#t} if @var{obj} is the specified weak hash table. Note | |
181 | that a doubly weak hash table is neither a weak key nor a weak value | |
182 | hash table.") | |
1bbd0b84 | 183 | #define FUNC_NAME s_scm_weak_key_hash_table_p |
0f2d19dd | 184 | { |
0c95b57d | 185 | return SCM_BOOL(SCM_WVECTP (x) && SCM_IS_WHVEC(x)); |
0f2d19dd | 186 | } |
1bbd0b84 | 187 | #undef FUNC_NAME |
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188 | |
189 | ||
a1ec6916 | 190 | SCM_DEFINE (scm_weak_value_hash_table_p, "weak-value-hash-table?", 1, 0, 0, |
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191 | (SCM x), |
192 | "") | |
193 | #define FUNC_NAME s_scm_weak_value_hash_table_p | |
0f2d19dd | 194 | { |
0c95b57d | 195 | return SCM_BOOL(SCM_WVECTP (x) && SCM_IS_WHVEC_V(x)); |
0f2d19dd | 196 | } |
1bbd0b84 | 197 | #undef FUNC_NAME |
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198 | |
199 | ||
a1ec6916 | 200 | SCM_DEFINE (scm_doubly_weak_hash_table_p, "doubly-weak-hash-table?", 1, 0, 0, |
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201 | (SCM x), |
202 | "") | |
203 | #define FUNC_NAME s_scm_doubly_weak_hash_table_p | |
0f2d19dd | 204 | { |
0c95b57d | 205 | return SCM_BOOL(SCM_WVECTP (x) && SCM_IS_WHVEC_B (x)); |
0f2d19dd | 206 | } |
1bbd0b84 | 207 | #undef FUNC_NAME |
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208 | |
209 | ||
210 | \f | |
211 | ||
1cc91f1b | 212 | |
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213 | void |
214 | scm_init_weaks () | |
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215 | { |
216 | #include "weaks.x" | |
217 | } | |
218 |