libguile/weaks.c

   1 /*      Copyright (C) 1995,1996 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, 675 Mass Ave, Cambridge, MA 02139, USA.
  16  *
  17  * As a special exception, Free Software Foundation gives permission
  18  * for additional uses of the text contained in its release of this library.
  19  *
  20  * The exception is that, if you link this library with other files
  21  * to produce an executable, this does not by itself cause the
  22  * resulting executable to be covered by the GNU General Public License.
  23  * Your use of that executable is in no way restricted on account of
  24  * linking this library code into it.
  25  *
  26  * This exception does not however invalidate any other reasons why
  27  * the executable file might be covered by the GNU General Public License.
  28  *
  29  * This exception applies only to the code released by
  30  * Free Software Foundation as part of this library.  If you copy
  31  * code from other releases distributed under the terms of the GPL into a copy of
  32  * this library, as the General Public License permits, the exception does
  33  * not apply to the code that you add in this way.  To avoid misleading
  34  * anyone as to the status of such modified files, you must delete
  35  * this exception notice from such code.
  36  *
  37  * If you write modifications of your own for this library, it is your choice
  38  * whether to permit this exception to apply to your modifications.
  39  * If you do not wish that, delete this exception notice.
  40  */
  41 \f
  42 #include <stdio.h>
  43 #include "_scm.h"
  44
  45 \f
  46
  47
  48 /* {Weak Vectors}
  49  */
  50
  51
  52 SCM_PROC(s_make_weak_vector, "make-weak-vector", 1, 1, 0, scm_make_weak_vector);
  53 #ifdef __STDC__
  54 SCM
  55 scm_make_weak_vector (SCM k, SCM fill)
  56 #else
  57 SCM
  58 scm_make_weak_vector (k, fill)
  59      SCM k;
  60      SCM fill;
  61 #endif
  62 {
  63   SCM v;
  64   v = scm_make_vector (scm_sum (k, SCM_MAKINUM (1)), fill, SCM_UNDEFINED);
  65   SCM_DEFER_INTS;
  66   SCM_SETLENGTH(v, SCM_INUM (k), scm_tc7_wvect);
  67   SCM_VELTS(v)[0] = (SCM)0;
  68   SCM_SETVELTS(v, SCM_VELTS(v) + 1);
  69   SCM_ALLOW_INTS;
  70   return v;
  71 }
  72
  73
  74 SCM_PROC(s_weak_vector, "weak-vector", 0, 0, 1, scm_weak_vector);
  75 SCM_PROC(s_list_to_weak_vector, "list->weak-vector", 1, 0, 0, scm_weak_vector);
  76 #ifdef __STDC__
  77 SCM
  78 scm_weak_vector (SCM l)
  79 #else
  80 SCM
  81 scm_weak_vector (l)
  82      SCM l;
  83 #endif
  84 {
  85   SCM res;
  86   register SCM *data;
  87   long i;
  88
  89   i = scm_ilength (l);
  90   SCM_ASSERT (i >= 0, l, SCM_ARG1, s_weak_vector);
  91   res = scm_make_weak_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED);
  92   data = SCM_VELTS (res);
  93   for (;
  94        i && SCM_NIMP (l) && SCM_CONSP (l);
  95        --i, l = SCM_CDR (l))
  96     *data++ = SCM_CAR (l);
  97   return res;
  98 }
  99
 100
 101 SCM_PROC(s_weak_vector_p, "weak-vector?", 1, 0, 0, scm_weak_vector_p);
 102 #ifdef __STDC__
 103 SCM
 104 scm_weak_vector_p (SCM x)
 105 #else
 106 SCM
 107 scm_weak_vector_p (x)
 108      SCM x;
 109 #endif
 110 {
 111   return ((SCM_NIMP (x) && SCM_WVECTP (x) && !SCM_IS_WHVEC (x))
 112           ? SCM_BOOL_T
 113           : SCM_BOOL_F);
 114 }
 115
 116
 117
 118 \f
 119
 120
 121
 122 SCM_PROC(s_make_weak_key_hash_table, "make-weak-key-hash-table", 1, 0, 0, scm_make_weak_key_hash_table);
 123 #ifdef __STDC__
 124 SCM
 125 scm_make_weak_key_hash_table (SCM k)
 126 #else
 127 SCM
 128 scm_make_weak_key_hash_table (k)
 129      SCM k;
 130 #endif
 131 {
 132   SCM v;
 133   SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG1, s_make_weak_key_hash_table);
 134   v = scm_make_weak_vector (k, SCM_EOL);
 135   SCM_ALLOW_INTS;
 136   SCM_VELTS (v)[-1] = 1;
 137   SCM_ALLOW_INTS;
 138   return v;
 139 }
 140
 141
 142 SCM_PROC (s_make_weak_value_hash_table, "make-weak-value-hash-table", 1, 0, 0, scm_make_weak_value_hash_table);
 143 #ifdef __STDC__
 144 SCM
 145 scm_make_weak_value_hash_table (SCM k)
 146 #else
 147 SCM
 148 scm_make_weak_value_hash_table (k)
 149      SCM k;
 150 #endif
 151 {
 152   SCM v;
 153   SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG1, s_make_weak_value_hash_table);
 154   v = scm_make_weak_vector (k, SCM_EOL);
 155   SCM_ALLOW_INTS;
 156   SCM_VELTS (v)[-1] = 2;
 157   SCM_ALLOW_INTS;
 158   return v;
 159 }
 160
 161
 162
 163 SCM_PROC (s_make_doubly_weak_hash_table, "make-doubly-weak-hash-table", 1, 0, 0, scm_make_doubly_weak_hash_table);
 164 #ifdef __STDC__
 165 SCM
 166 scm_make_doubly_weak_hash_table (SCM k)
 167 #else
 168 SCM
 169 scm_make_doubly_weak_hash_table (k)
 170      SCM k;
 171 #endif
 172 {
 173   SCM v;
 174   SCM_ASSERT (SCM_INUMP (k), k, SCM_ARG1, s_make_doubly_weak_hash_table);
 175   v = scm_make_weak_vector (k, SCM_EOL);
 176   SCM_ALLOW_INTS;
 177   SCM_VELTS (v)[-1] = 3;
 178   SCM_ALLOW_INTS;
 179   return v;
 180 }
 181
 182 SCM_PROC(s_weak_key_hash_table_p, "weak-key-hash-table?", 1, 0, 0, scm_weak_key_hash_table_p);
 183 #ifdef __STDC__
 184 SCM
 185 scm_weak_key_hash_table_p (SCM x)
 186 #else
 187 SCM
 188 scm_weak_key_hash_table_p (x)
 189      SCM x;
 190 #endif
 191 {
 192   return ((SCM_NIMP (x) && SCM_WVECTP (x) && SCM_IS_WHVEC(x))
 193           ? SCM_BOOL_T
 194           : SCM_BOOL_F);
 195 }
 196
 197
 198 SCM_PROC (s_weak_value_hash_table_p, "weak-value-hash-table?", 1, 0, 0, scm_weak_value_hash_table_p);
 199 #ifdef __STDC__
 200 SCM
 201 scm_weak_value_hash_table_p (SCM x)
 202 #else
 203 SCM
 204 scm_weak_value_hash_table_p (x)
 205      SCM x;
 206 #endif
 207 {
 208   return ((SCM_NIMP (x) && SCM_WVECTP (x) && SCM_IS_WHVEC_V(x))
 209           ? SCM_BOOL_T
 210           : SCM_BOOL_F);
 211 }
 212
 213
 214 SCM_PROC (s_doubly_weak_hash_table_p, "doubly-weak-hash-table?", 1, 0, 0, scm_doubly_weak_hash_table_p);
 215 #ifdef __STDC__
 216 SCM
 217 scm_doubly_weak_hash_table_p (SCM x)
 218 #else
 219 SCM
 220 scm_doubly_weak_hash_table_p (x)
 221      SCM x;
 222 #endif
 223 {
 224   return ((SCM_NIMP (x) && SCM_WVECTP (x) && SCM_IS_WHVEC_B (x))
 225           ? SCM_BOOL_T
 226           : SCM_BOOL_F);
 227 }
 228
 229
 230 \f
 231
 232 #ifdef __STDC__
 233 void
 234 scm_init_weaks (void)
 235 #else
 236 void
 237 scm_init_weaks ()
 238 #endif
 239 {
 240 #include "weaks.x"
 241 }
 242