src/st-object.c

   1 /*
   2  * st-object.c
   3  *
   4  * Copyright (C) 2008 Vincent Geddes
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23 */
  24
  25 #include "st-object.h"
  26 #include "st-universe.h"
  27 #include "st-behavior.h"
  28 #include "st-small-integer.h"
  29 #include "st-association.h"
  30 #include "st-float.h"
  31 #include "st-array.h"
  32 #include "st-array.h"
  33 #include "st-symbol.h"
  34 #include "st-object.h"
  35 #include "st-character.h"
  36 #include "st-handle.h"
  37 #include "st-unicode.h"
  38
  39 void
  40 st_object_initialize_header (st_oop object, st_oop class)
  41 {
  42     ST_OBJECT_MARK (object)  = 0 | ST_MARK_TAG;
  43     ST_OBJECT_CLASS (object) = class;
  44     st_object_set_format (object, st_smi_value (ST_BEHAVIOR_FORMAT (class)));
  45     st_object_set_instance_size (object, st_smi_value (ST_BEHAVIOR_INSTANCE_SIZE (class)));
  46 }
  47
  48 bool
  49 st_object_equal (st_oop object, st_oop other)
  50 {
  51     if (st_object_class (object) == ST_SMI_CLASS)
  52         return st_smi_equal (object, other);
  53
  54     if (st_object_class (object) == ST_CHARACTER_CLASS)
  55         return st_character_equal (object, other);
  56
  57     if (ST_OBJECT_CLASS (object) == ST_FLOAT_CLASS)
  58         return st_float_equal (object, other);
  59
  60     if (ST_OBJECT_CLASS (object) == ST_ASSOCIATION_CLASS)
  61         return st_association_equal (object, other);
  62
  63     if (ST_OBJECT_CLASS (object) == ST_SYMBOL_CLASS)
  64         return st_symbol_equal (object, other);
  65
  66     if (ST_OBJECT_CLASS (object) == ST_BYTE_ARRAY_CLASS ||
  67         ST_OBJECT_CLASS (object) == ST_STRING_CLASS)
  68         return st_byte_array_equal (object, other);
  69
  70     return object == other;
  71 }
  72
  73 st_uint
  74 st_object_hash (st_oop object)
  75 {
  76     if (st_object_class (object) == ST_SMI_CLASS)
  77         return st_smi_hash (object);
  78
  79     if (st_object_class (object) == ST_BYTE_ARRAY_CLASS ||
  80         st_object_class (object) == ST_STRING_CLASS     ||
  81         st_object_class (object) == ST_SYMBOL_CLASS)
  82         return st_byte_array_hash (object);
  83
  84     if (st_object_class (object) == ST_FLOAT_CLASS)
  85         return st_float_hash (object);
  86
  87     if (st_object_class (object) == ST_CHARACTER_CLASS)
  88         return st_character_hash (object);
  89
  90     if (st_object_class (object) == ST_ASSOCIATION_CLASS)
  91         return st_association_hash (object);
  92
  93     return object >> 2;
  94 }
  95
  96 st_oop
  97 st_object_allocate (st_oop class)
  98 {
  99     st_oop *fields;
 100     st_uint size, instance_size;
 101     st_oop  object;
 102
 103     instance_size = st_smi_value (ST_BEHAVIOR_INSTANCE_SIZE (class));
 104     size = ST_SIZE_OOPS (struct st_header) + instance_size;
 105     object = st_memory_allocate (size);
 106     if (object == 0) {
 107         st_memory_perform_gc ();
 108         class = st_memory_remap_reference (class);
 109         object = st_memory_allocate (size);
 110         st_assert (object != 0);
 111     }
 112
 113     st_object_initialize_header (object, class);
 114
 115     fields = ST_OBJECT_FIELDS (object);
 116     for (st_uint i = 0; i < instance_size; i++)
 117         fields[i] = ST_NIL;
 118
 119     return object;
 120 }
 121
 122 st_oop
 123 st_handle_allocate (st_oop class)
 124 {
 125     st_oop *fields;
 126     st_oop  object;
 127     st_uint size;
 128
 129     size = ST_SIZE_OOPS (struct st_handle);
 130     object = st_memory_allocate (size);
 131     if (object == 0) {
 132         st_memory_perform_gc ();
 133         class = st_memory_remap_reference (class);
 134         object = st_memory_allocate (size);
 135         st_assert (object != 0);
 136     }
 137     st_object_initialize_header (object, class);
 138
 139     return object;
 140 }