| 1 | /* Copyright (C) 1995, 1996, 1998, 2000, 2001, 2003, 2006, 2008, 2009, |
| 2 | * 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public License |
| 6 | * as published by the Free Software Foundation; either version 3 of |
| 7 | * the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with this library; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 17 | * 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | \f |
| 22 | #ifdef HAVE_CONFIG_H |
| 23 | # include <config.h> |
| 24 | #endif |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | #include "libguile/_scm.h" |
| 29 | #include "libguile/vectors.h" |
| 30 | |
| 31 | #include "libguile/validate.h" |
| 32 | |
| 33 | \f |
| 34 | |
| 35 | /* {Weak Vectors} |
| 36 | */ |
| 37 | |
| 38 | #define VECTOR_MAX_LENGTH (SCM_T_BITS_MAX >> 8) |
| 39 | |
| 40 | SCM |
| 41 | scm_c_make_weak_vector (size_t len, SCM fill) |
| 42 | #define FUNC_NAME "make-weak-vector" |
| 43 | { |
| 44 | SCM wv; |
| 45 | size_t j; |
| 46 | |
| 47 | SCM_ASSERT_RANGE (1, scm_from_size_t (len), len <= VECTOR_MAX_LENGTH); |
| 48 | |
| 49 | if (SCM_UNBNDP (fill)) |
| 50 | fill = SCM_UNSPECIFIED; |
| 51 | |
| 52 | wv = SCM_PACK_POINTER (scm_gc_malloc_pointerless ((len + 1) * sizeof (SCM), |
| 53 | "weak vector")); |
| 54 | |
| 55 | SCM_SET_CELL_WORD_0 (wv, (len << 8) | scm_tc7_wvect); |
| 56 | |
| 57 | if (SCM_HEAP_OBJECT_P (fill)) |
| 58 | { |
| 59 | memset (SCM_I_VECTOR_WELTS (wv), 0, len * sizeof (SCM)); |
| 60 | for (j = 0; j < len; j++) |
| 61 | scm_c_weak_vector_set_x (wv, j, fill); |
| 62 | } |
| 63 | else |
| 64 | for (j = 0; j < len; j++) |
| 65 | SCM_SIMPLE_VECTOR_SET (wv, j, fill); |
| 66 | |
| 67 | return wv; |
| 68 | } |
| 69 | #undef FUNC_NAME |
| 70 | |
| 71 | SCM_DEFINE (scm_make_weak_vector, "make-weak-vector", 1, 1, 0, |
| 72 | (SCM size, SCM fill), |
| 73 | "Return a weak vector with @var{size} elements. If the optional\n" |
| 74 | "argument @var{fill} is given, all entries in the vector will be\n" |
| 75 | "set to @var{fill}. The default value for @var{fill} is the\n" |
| 76 | "empty list.") |
| 77 | #define FUNC_NAME s_scm_make_weak_vector |
| 78 | { |
| 79 | return scm_c_make_weak_vector (scm_to_size_t (size), fill); |
| 80 | } |
| 81 | #undef FUNC_NAME |
| 82 | |
| 83 | |
| 84 | SCM_REGISTER_PROC(s_list_to_weak_vector, "list->weak-vector", 1, 0, 0, scm_weak_vector); |
| 85 | |
| 86 | SCM_DEFINE (scm_weak_vector, "weak-vector", 0, 0, 1, |
| 87 | (SCM lst), |
| 88 | "@deffnx {Scheme Procedure} list->weak-vector lst\n" |
| 89 | "Construct a weak vector from a list: @code{weak-vector} uses\n" |
| 90 | "the list of its arguments while @code{list->weak-vector} uses\n" |
| 91 | "its only argument @var{l} (a list) to construct a weak vector\n" |
| 92 | "the same way @code{list->vector} would.") |
| 93 | #define FUNC_NAME s_scm_weak_vector |
| 94 | { |
| 95 | SCM wv; |
| 96 | size_t i; |
| 97 | long c_size; |
| 98 | |
| 99 | SCM_VALIDATE_LIST_COPYLEN (SCM_ARG1, lst, c_size); |
| 100 | |
| 101 | wv = scm_c_make_weak_vector ((size_t) c_size, SCM_BOOL_F); |
| 102 | |
| 103 | for (i = 0; scm_is_pair (lst); lst = SCM_CDR (lst), i++) |
| 104 | scm_c_weak_vector_set_x (wv, i, SCM_CAR (lst)); |
| 105 | |
| 106 | return wv; |
| 107 | } |
| 108 | #undef FUNC_NAME |
| 109 | |
| 110 | |
| 111 | SCM_DEFINE (scm_weak_vector_p, "weak-vector?", 1, 0, 0, |
| 112 | (SCM obj), |
| 113 | "Return @code{#t} if @var{obj} is a weak vector. Note that all\n" |
| 114 | "weak hashes are also weak vectors.") |
| 115 | #define FUNC_NAME s_scm_weak_vector_p |
| 116 | { |
| 117 | return scm_from_bool (scm_is_weak_vector (obj)); |
| 118 | } |
| 119 | #undef FUNC_NAME |
| 120 | |
| 121 | |
| 122 | int |
| 123 | scm_is_weak_vector (SCM obj) |
| 124 | #define FUNC_NAME s_scm_weak_vector_p |
| 125 | { |
| 126 | return SCM_I_WVECTP (obj); |
| 127 | } |
| 128 | #undef FUNC_NAME |
| 129 | |
| 130 | |
| 131 | #define SCM_VALIDATE_WEAK_VECTOR(pos, var) \ |
| 132 | SCM_I_MAKE_VALIDATE_MSG2 (pos, var, SCM_I_WVECTP, "weak vector") |
| 133 | |
| 134 | |
| 135 | SCM_DEFINE (scm_weak_vector_length, "weak-vector-length", 1, 0, 0, |
| 136 | (SCM wvect), |
| 137 | "Like @code{vector-length}, but for weak vectors.") |
| 138 | #define FUNC_NAME s_scm_weak_vector_length |
| 139 | { |
| 140 | return scm_from_size_t (scm_c_weak_vector_length (wvect)); |
| 141 | } |
| 142 | #undef FUNC_NAME |
| 143 | |
| 144 | |
| 145 | size_t |
| 146 | scm_c_weak_vector_length (SCM wvect) |
| 147 | #define FUNC_NAME s_scm_weak_vector_length |
| 148 | { |
| 149 | SCM_VALIDATE_WEAK_VECTOR (1, wvect); |
| 150 | return SCM_I_VECTOR_LENGTH (wvect); |
| 151 | } |
| 152 | #undef FUNC_NAME |
| 153 | |
| 154 | |
| 155 | SCM_DEFINE (scm_weak_vector_ref, "weak-vector-ref", 2, 0, 0, |
| 156 | (SCM wvect, SCM k), |
| 157 | "Like @code{vector-ref}, but for weak vectors.") |
| 158 | #define FUNC_NAME s_scm_weak_vector_ref |
| 159 | { |
| 160 | return scm_c_weak_vector_ref (wvect, scm_to_size_t (k)); |
| 161 | } |
| 162 | #undef FUNC_NAME |
| 163 | |
| 164 | |
| 165 | struct weak_vector_ref_data |
| 166 | { |
| 167 | SCM wv; |
| 168 | size_t k; |
| 169 | }; |
| 170 | |
| 171 | static void* |
| 172 | weak_vector_ref (void *data) |
| 173 | { |
| 174 | struct weak_vector_ref_data *d = data; |
| 175 | |
| 176 | return (void *) SCM_UNPACK (SCM_SIMPLE_VECTOR_REF (d->wv, d->k)); |
| 177 | } |
| 178 | |
| 179 | SCM |
| 180 | scm_c_weak_vector_ref (SCM wv, size_t k) |
| 181 | #define FUNC_NAME s_scm_weak_vector_ref |
| 182 | { |
| 183 | struct weak_vector_ref_data d; |
| 184 | void *ret; |
| 185 | |
| 186 | SCM_VALIDATE_WEAK_VECTOR (1, wv); |
| 187 | |
| 188 | d.wv = wv; |
| 189 | d.k = k; |
| 190 | |
| 191 | if (k >= SCM_I_VECTOR_LENGTH (wv)) |
| 192 | scm_out_of_range ("weak-vector-ref", scm_from_size_t (k)); |
| 193 | |
| 194 | ret = GC_call_with_alloc_lock (weak_vector_ref, &d); |
| 195 | |
| 196 | if (ret) |
| 197 | return SCM_PACK_POINTER (ret); |
| 198 | else |
| 199 | return SCM_BOOL_F; |
| 200 | } |
| 201 | #undef FUNC_NAME |
| 202 | |
| 203 | |
| 204 | SCM_DEFINE (scm_weak_vector_set_x, "weak-vector-set!", 3, 0, 0, |
| 205 | (SCM wvect, SCM k, SCM obj), |
| 206 | "Like @code{vector-set!}, but for weak vectors.") |
| 207 | #define FUNC_NAME s_scm_weak_vector_set_x |
| 208 | { |
| 209 | scm_c_weak_vector_set_x (wvect, scm_to_size_t (k), obj); |
| 210 | |
| 211 | return SCM_UNSPECIFIED; |
| 212 | } |
| 213 | #undef FUNC_NAME |
| 214 | |
| 215 | |
| 216 | void |
| 217 | scm_c_weak_vector_set_x (SCM wv, size_t k, SCM x) |
| 218 | #define FUNC_NAME s_scm_weak_vector_set_x |
| 219 | { |
| 220 | SCM *elts; |
| 221 | struct weak_vector_ref_data d; |
| 222 | void *prev; |
| 223 | |
| 224 | SCM_VALIDATE_WEAK_VECTOR (1, wv); |
| 225 | |
| 226 | d.wv = wv; |
| 227 | d.k = k; |
| 228 | |
| 229 | if (k >= SCM_I_VECTOR_LENGTH (wv)) |
| 230 | scm_out_of_range ("weak-vector-set!", scm_from_size_t (k)); |
| 231 | |
| 232 | prev = GC_call_with_alloc_lock (weak_vector_ref, &d); |
| 233 | |
| 234 | elts = SCM_I_VECTOR_WELTS (wv); |
| 235 | |
| 236 | if (prev && SCM_HEAP_OBJECT_P (SCM_PACK_POINTER (prev))) |
| 237 | GC_unregister_disappearing_link ((void **) &elts[k]); |
| 238 | |
| 239 | elts[k] = x; |
| 240 | |
| 241 | if (SCM_HEAP_OBJECT_P (x)) |
| 242 | SCM_I_REGISTER_DISAPPEARING_LINK ((void **) &elts[k], |
| 243 | SCM2PTR (x)); |
| 244 | } |
| 245 | #undef FUNC_NAME |
| 246 | |
| 247 | |
| 248 | \f |
| 249 | static void |
| 250 | scm_init_weak_vector_builtins (void) |
| 251 | { |
| 252 | #ifndef SCM_MAGIC_SNARFER |
| 253 | #include "libguile/weak-vector.x" |
| 254 | #endif |
| 255 | } |
| 256 | |
| 257 | void |
| 258 | scm_init_weak_vectors () |
| 259 | { |
| 260 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
| 261 | "scm_init_weak_vector_builtins", |
| 262 | (scm_t_extension_init_func)scm_init_weak_vector_builtins, |
| 263 | NULL); |
| 264 | } |
| 265 | |
| 266 | |
| 267 | /* |
| 268 | Local Variables: |
| 269 | c-file-style: "gnu" |
| 270 | End: |
| 271 | */ |