src/vm/primitive.c

   1 /* src/vm/primitive.c - primitive types
   2
   3    Copyright (C) 2007, 2008
   4    CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
   5
   6    This file is part of CACAO.
   7
   8    This program is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 2, or (at
  11    your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.
  22
  23 */
  24
  25
  26 #include "config.h"
  27
  28 #include <assert.h>
  29 #include <stdint.h>
  30
  31 #include "native/jni.h"
  32 #include "native/llni.h"
  33
  34 #include "native/include/java_lang_Boolean.h"
  35 #include "native/include/java_lang_Byte.h"
  36 #include "native/include/java_lang_Short.h"
  37 #include "native/include/java_lang_Character.h"
  38 #include "native/include/java_lang_Integer.h"
  39 #include "native/include/java_lang_Long.h"
  40 #include "native/include/java_lang_Float.h"
  41 #include "native/include/java_lang_Double.h"
  42
  43 #include "vm/builtin.h"
  44 #include "vm/global.h"
  45 #include "vm/primitive.h"
  46 #include "vm/vm.h"
  47
  48 #include "vmcore/class.h"
  49 #include "vmcore/utf8.h"
  50
  51
  52 /* primitive_class_get_by_name *************************************************
  53
  54    Returns the primitive class of the given class name.
  55
  56 *******************************************************************************/
  57
  58 classinfo *primitive_class_get_by_name(utf *name)
  59 {
  60         int i;
  61
  62         /* search table of primitive classes */
  63
  64         for (i = 0; i < PRIMITIVETYPE_COUNT; i++)
  65                 if (primitivetype_table[i].name == name)
  66                         return primitivetype_table[i].class_primitive;
  67
  68         /* keep compiler happy */
  69
  70         return NULL;
  71 }
  72
  73
  74 /* primitive_class_get_by_type *************************************************
  75
  76    Returns the primitive class of the given type.
  77
  78 *******************************************************************************/
  79
  80 classinfo *primitive_class_get_by_type(int type)
  81 {
  82         return primitivetype_table[type].class_primitive;
  83 }
  84
  85
  86 /* primitive_class_get_by_char *************************************************
  87
  88    Returns the primitive class of the given type.
  89
  90 *******************************************************************************/
  91
  92 classinfo *primitive_class_get_by_char(char ch)
  93 {
  94         int index;
  95
  96         switch (ch) {
  97         case 'I':
  98                 index = PRIMITIVETYPE_INT;
  99                 break;
 100         case 'J':
 101                 index = PRIMITIVETYPE_LONG;
 102                 break;
 103         case 'F':
 104                 index = PRIMITIVETYPE_FLOAT;
 105                 break;
 106         case 'D':
 107                 index = PRIMITIVETYPE_DOUBLE;
 108                 break;
 109         case 'B':
 110                 index = PRIMITIVETYPE_BYTE;
 111                 break;
 112         case 'C':
 113                 index = PRIMITIVETYPE_CHAR;
 114                 break;
 115         case 'S':
 116                 index = PRIMITIVETYPE_SHORT;
 117                 break;
 118         case 'Z':
 119                 index = PRIMITIVETYPE_BOOLEAN;
 120                 break;
 121         case 'V':
 122                 index = PRIMITIVETYPE_VOID;
 123                 break;
 124         default:
 125                 return NULL;
 126         }
 127
 128         return primitivetype_table[index].class_primitive;
 129 }
 130
 131
 132 /* primitive_arrayclass_get_by_name ********************************************
 133
 134    Returns the primitive array-class of the given primitive class
 135    name.
 136
 137 *******************************************************************************/
 138
 139 classinfo *primitive_arrayclass_get_by_name(utf *name)
 140 {
 141         int i;
 142
 143         /* search table of primitive classes */
 144
 145         for (i = 0; i < PRIMITIVETYPE_COUNT; i++)
 146                 if (primitivetype_table[i].name == name)
 147                         return primitivetype_table[i].arrayclass;
 148
 149         /* keep compiler happy */
 150
 151         return NULL;
 152 }
 153
 154
 155 /* primitive_arrayclass_get_by_type ********************************************
 156
 157    Returns the primitive array-class of the given type.
 158
 159 *******************************************************************************/
 160
 161 classinfo *primitive_arrayclass_get_by_type(int type)
 162 {
 163         return primitivetype_table[type].arrayclass;
 164 }
 165
 166
 167 /* primitive_type_get_by_wrapperclass ******************************************
 168
 169    Returns the primitive type of the given wrapper-class.
 170
 171 *******************************************************************************/
 172
 173 int primitive_type_get_by_wrapperclass(classinfo *c)
 174 {
 175         int i;
 176
 177         /* Search primitive table. */
 178
 179         for (i = 0; i < PRIMITIVETYPE_COUNT; i++)
 180                 if (primitivetype_table[i].class_wrap == c)
 181                         return i;
 182
 183         /* Invalid primitive wrapper-class. */
 184
 185         return -1;
 186 }
 187
 188
 189 /* primitive_box ***************************************************************
 190
 191    Box a primitive of the given type.  If the type is an object,
 192    simply return it.
 193
 194 *******************************************************************************/
 195
 196 java_handle_t *primitive_box(int type, imm_union value)
 197 {
 198         java_handle_t *o;
 199
 200         switch (type) {
 201         case PRIMITIVETYPE_BOOLEAN:
 202                 o = primitive_box_boolean(value.i);
 203                 break;
 204         case PRIMITIVETYPE_BYTE:
 205                 o = primitive_box_byte(value.i);
 206                 break;
 207         case PRIMITIVETYPE_CHAR:
 208                 o = primitive_box_char(value.i);
 209                 break;
 210         case PRIMITIVETYPE_SHORT:
 211                 o = primitive_box_short(value.i);
 212                 break;
 213         case PRIMITIVETYPE_INT:
 214                 o = primitive_box_int(value.i);
 215                 break;
 216         case PRIMITIVETYPE_LONG:
 217                 o = primitive_box_long(value.l);
 218                 break;
 219         case PRIMITIVETYPE_FLOAT:
 220                 o = primitive_box_float(value.f);
 221                 break;
 222         case PRIMITIVETYPE_DOUBLE:
 223                 o = primitive_box_double(value.d);
 224                 break;
 225         case PRIMITIVETYPE_VOID:
 226                 o = value.a;
 227                 break;
 228         default:
 229                 o = NULL;
 230                 vm_abort("primitive_box: invalid primitive type %d", type);
 231         }
 232
 233         return o;
 234 }
 235
 236
 237 /* primitive_unbox *************************************************************
 238
 239    Unbox a primitive of the given type.  If the type is an object,
 240    simply return it.
 241
 242 *******************************************************************************/
 243
 244 imm_union primitive_unbox(java_handle_t *o)
 245 {
 246         classinfo *c;
 247         int        type;
 248         imm_union  value;
 249
 250         if (o == NULL) {
 251                 value.a = NULL;
 252                 return value;
 253         }
 254
 255         LLNI_class_get(o, c);
 256
 257         type = primitive_type_get_by_wrapperclass(c);
 258
 259         switch (type) {
 260         case PRIMITIVETYPE_BOOLEAN:
 261                 value.i = primitive_unbox_boolean(o);
 262                 break;
 263         case PRIMITIVETYPE_BYTE:
 264                 value.i = primitive_unbox_byte(o);
 265                 break;
 266         case PRIMITIVETYPE_CHAR:
 267                 value.i = primitive_unbox_char(o);
 268                 break;
 269         case PRIMITIVETYPE_SHORT:
 270                 value.i = primitive_unbox_short(o);
 271                 break;
 272         case PRIMITIVETYPE_INT:
 273                 value.i = primitive_unbox_int(o);
 274                 break;
 275         case PRIMITIVETYPE_LONG:
 276                 value.l = primitive_unbox_long(o);
 277                 break;
 278         case PRIMITIVETYPE_FLOAT:
 279                 value.f = primitive_unbox_float(o);
 280                 break;
 281         case PRIMITIVETYPE_DOUBLE:
 282                 value.d = primitive_unbox_double(o);
 283                 break;
 284         case -1:
 285                 /* If type is -1 the object is not a primitive box but a
 286                    normal object. */
 287                 value.a = o;
 288                 break;
 289         default:
 290                 vm_abort("primitive_unbox: invalid primitive type %d", type);
 291         }
 292
 293         return value;
 294 }
 295
 296
 297 /* primitive_box_xxx ***********************************************************
 298
 299    Box a primitive type.
 300
 301 *******************************************************************************/
 302
 303 #define PRIMITIVE_BOX_TYPE(name, object, type)      \
 304 java_handle_t *primitive_box_##name(type value)     \
 305 {                                                   \
 306         java_handle_t      *o;                          \
 307         java_lang_##object *jo;                         \
 308                                                     \
 309         o = builtin_new(class_java_lang_##object);      \
 310                                                     \
 311         if (o == NULL)                                  \
 312                 return NULL;                                \
 313                                                     \
 314         jo = (java_lang_##object *) o;                  \
 315                                                     \
 316         LLNI_field_set_val(jo, value, value);           \
 317                                                     \
 318         return o;                                       \
 319 }
 320
 321 PRIMITIVE_BOX_TYPE(boolean, Boolean,   int32_t)
 322 PRIMITIVE_BOX_TYPE(byte,    Byte,      int32_t)
 323 PRIMITIVE_BOX_TYPE(char,    Character, int32_t)
 324 PRIMITIVE_BOX_TYPE(short,   Short,     int32_t)
 325 PRIMITIVE_BOX_TYPE(int,     Integer,   int32_t)
 326 PRIMITIVE_BOX_TYPE(long,    Long,      int64_t)
 327 PRIMITIVE_BOX_TYPE(float,   Float,     float)
 328 PRIMITIVE_BOX_TYPE(double,  Double,    double)
 329
 330
 331 /* primitive_unbox_xxx *********************************************************
 332
 333    Unbox a primitive type.
 334
 335 *******************************************************************************/
 336
 337 #define PRIMITIVE_UNBOX_TYPE(name, object, type)  \
 338 type primitive_unbox_##name(java_handle_t *o)     \
 339 {                                                 \
 340         java_lang_##object *jo;                       \
 341         type                value;                    \
 342                                                   \
 343         jo = (java_lang_##object *) o;                \
 344                                                   \
 345         LLNI_field_get_val(jo, value, value);         \
 346                                                   \
 347         return value;                                 \
 348 }
 349
 350 PRIMITIVE_UNBOX_TYPE(boolean, Boolean,   int32_t)
 351 PRIMITIVE_UNBOX_TYPE(byte,    Byte,      int32_t)
 352 PRIMITIVE_UNBOX_TYPE(char,    Character, int32_t)
 353 PRIMITIVE_UNBOX_TYPE(short,   Short,     int32_t)
 354 PRIMITIVE_UNBOX_TYPE(int,     Integer,   int32_t)
 355 PRIMITIVE_UNBOX_TYPE(long,    Long,      int64_t)
 356 PRIMITIVE_UNBOX_TYPE(float,   Float,     float)
 357 PRIMITIVE_UNBOX_TYPE(double,  Double,    double)
 358
 359
 360 /*
 361  * These are local overrides for various environment variables in Emacs.
 362  * Please do not remove this and leave it at the end of the file, where
 363  * Emacs will automagically detect them.
 364  * ---------------------------------------------------------------------
 365  * Local variables:
 366  * mode: c
 367  * indent-tabs-mode: t
 368  * c-basic-offset: 4
 369  * tab-width: 4
 370  * End:
 371  * vim:noexpandtab:sw=4:ts=4:
 372  */