src/vm/primitive.c

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