libguile/weaks.c

   1 /*      Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
   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
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  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.
  40  * If you do not wish that, delete this exception notice.  */
  41 \f
  42 #include <stdio.h>
  43 #include "_scm.h"
  44
  45 #include "weaks.h"
  46 \f
  47
  48
  49 /* {Weak Vectors}
  50  */
  51
  52
  53 SCM_PROC(s_make_weak_vector, "make-weak-vector", 1, 1, 0, scm_make_weak_vector);
  54
  55 SCM
  56 scm_make_weak_vector (k, fill)
  57      SCM k;
  58      SCM fill;
  59 {
  60   SCM v;
  61   v = scm_make_vector (scm_sum (k, SCM_MAKINUM (2)), fill);
  62   SCM_DEFER_INTS;
  63   SCM_SETLENGTH(v, SCM_INUM (k), scm_tc7_wvect);
  64   SCM_VELTS(v)[0] = SCM_EOL;
  65   SCM_VELTS(v)[1] = (SCM)0;
  66   SCM_SETVELTS(v, SCM_VELTS(v) + 2);
  67   SCM_ALLOW_INTS;
  68   return v;
  69 }
  70
  71
  72 SCM_PROC(s_weak_vector, "weak-vector", 0, 0, 1, scm_weak_vector);
  73 SCM_PROC(s_list_to_weak_vector, "list->weak-vector", 1, 0, 0, scm_weak_vector);
  74
  75 SCM
  76 scm_weak_vector (l)
  77      SCM l;
  78 {
  79   SCM res;
  80   register SCM *data;
  81   long i;
  82
  83   i = scm_ilength (l);
  84   SCM_ASSERT (i >= 0, l, SCM_ARG1, s_weak_vector);
  85   res = scm_make_weak_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED);
  86   data = SCM_VELTS (res);
  87   for (;
  88        i && SCM_NIMP (l) && SCM_CONSP (l);
  89        --i, l = SCM_CDR (l))
  90     *data++ = SCM_CAR (l);
  91   return res;
  92 }
  93
  94
  95 SCM_PROC(s_weak_vector_p, "weak-vector?", 1, 0, 0, scm_weak_vector_p);
  96
  97 SCM
  98 scm_weak_vector_p (x)
  99      SCM x;
 100 {
 101   return ((SCM_NIMP (x) && SCM_WVECTP (x) && !SCM_IS_WHVEC (x))
 102           ? SCM_BOOL_T
 103           : SCM_BOOL_F);
 104 }
 105
 106
 107
 108 \f
 109
 110
 111
 112 SCM_PROC(s_make_weak_key_hash_table, "make-weak-key-hash-table", 1, 0, 0, scm_make_weak_key_hash_table);
 113
 114 SCM
 115 scm_make_weak_key_hash_table (k)
 116      SCM k;
 117 {
 118   SCM v;
 119   SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG1, s_make_weak_key_hash_table);
 120   v = scm_make_weak_vector (k, SCM_EOL);
 121   SCM_ALLOW_INTS;
 122   SCM_VELTS (v)[-1] = 1;
 123   SCM_ALLOW_INTS;
 124   return v;
 125 }
 126
 127
 128 SCM_PROC (s_make_weak_value_hash_table, "make-weak-value-hash-table", 1, 0, 0, scm_make_weak_value_hash_table);
 129
 130 SCM
 131 scm_make_weak_value_hash_table (k)
 132      SCM k;
 133 {
 134   SCM v;
 135   SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG1, s_make_weak_value_hash_table);
 136   v = scm_make_weak_vector (k, SCM_EOL);
 137   SCM_ALLOW_INTS;
 138   SCM_VELTS (v)[-1] = 2;
 139   SCM_ALLOW_INTS;
 140   return v;
 141 }
 142
 143
 144
 145 SCM_PROC (s_make_doubly_weak_hash_table, "make-doubly-weak-hash-table", 1, 0, 0, scm_make_doubly_weak_hash_table);
 146
 147 SCM
 148 scm_make_doubly_weak_hash_table (k)
 149      SCM k;
 150 {
 151   SCM v;
 152   SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG1, s_make_doubly_weak_hash_table);
 153   v = scm_make_weak_vector (k, SCM_EOL);
 154   SCM_ALLOW_INTS;
 155   SCM_VELTS (v)[-1] = 3;
 156   SCM_ALLOW_INTS;
 157   return v;
 158 }
 159
 160 SCM_PROC(s_weak_key_hash_table_p, "weak-key-hash-table?", 1, 0, 0, scm_weak_key_hash_table_p);
 161
 162 SCM
 163 scm_weak_key_hash_table_p (x)
 164      SCM x;
 165 {
 166   return ((SCM_NIMP (x) && SCM_WVECTP (x) && SCM_IS_WHVEC(x))
 167           ? SCM_BOOL_T
 168           : SCM_BOOL_F);
 169 }
 170
 171
 172 SCM_PROC (s_weak_value_hash_table_p, "weak-value-hash-table?", 1, 0, 0, scm_weak_value_hash_table_p);
 173
 174 SCM
 175 scm_weak_value_hash_table_p (x)
 176      SCM x;
 177 {
 178   return ((SCM_NIMP (x) && SCM_WVECTP (x) && SCM_IS_WHVEC_V(x))
 179           ? SCM_BOOL_T
 180           : SCM_BOOL_F);
 181 }
 182
 183
 184 SCM_PROC (s_doubly_weak_hash_table_p, "doubly-weak-hash-table?", 1, 0, 0, scm_doubly_weak_hash_table_p);
 185
 186 SCM
 187 scm_doubly_weak_hash_table_p (x)
 188      SCM x;
 189 {
 190   return ((SCM_NIMP (x) && SCM_WVECTP (x) && SCM_IS_WHVEC_B (x))
 191           ? SCM_BOOL_T
 192           : SCM_BOOL_F);
 193 }
 194
 195
 196 \f
 197
 198
 199 void
 200 scm_init_weaks ()
 201 {
 202 #include "weaks.x"
 203 }
 204