src/st-float.h

   1 /*
   2  * st-float.h
   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 #ifndef __ST_FLOAT_H__
  26 #define __ST_FLOAT_H__
  27
  28 #include <st-types.h>
  29 #include <st-object.h>
  30
  31 #define ST_FLOAT(oop) ((struct st_float *) st_detag_pointer (oop))
  32
  33 struct st_float
  34 {
  35     struct st_header __parent__;
  36
  37     double value;
  38 };
  39
  40 st_oop st_float_new       (double value);
  41 st_oop st_float_allocate  (st_oop class);
  42
  43 static inline double
  44 st_float_value (st_oop object)
  45 {
  46     return ST_FLOAT (object)->value;
  47 }
  48
  49 static inline void
  50 st_float_set_value (st_oop object, double value)
  51 {
  52     ST_FLOAT (object)->value = value;
  53 }
  54
  55 static inline bool
  56 st_float_equal (st_oop object, st_oop other)
  57 {
  58     if (st_object_class (other) != ST_FLOAT_CLASS)
  59         return false;
  60
  61     return st_float_value (object) == st_float_value (other);
  62 }
  63
  64 static inline st_uint
  65 st_float_hash (st_oop object)
  66 {
  67     return (st_uint) st_float_value (object);
  68 }
  69
  70 #endif /* __ST_FLOAT_H__ */