goo/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-descriptor.h>
  30 #include <st-heap-object.h>
  31 #include <st-object.h>
  32
  33 #define ST_FLOAT(oop) ((struct st_float *) ST_POINTER (oop))
  34
  35 struct st_float
  36 {
  37     struct st_header header;
  38
  39     double value;
  40
  41 };
  42
  43 st_oop        st_float_new       (double value);
  44
  45 INLINE double st_float_value     (st_oop f);
  46
  47 INLINE void   st_float_set_value (st_oop f, double value);
  48
  49 INLINE bool   st_float_equal     (st_oop object, st_oop other);
  50
  51 INLINE st_uint  st_float_hash      (st_oop object);
  52
  53 st_descriptor *st_float_descriptor (void);
  54
  55 INLINE double
  56 st_float_value (st_oop f)
  57 {
  58     return ST_FLOAT (f)->value;
  59 }
  60
  61 INLINE void
  62 st_float_set_value (st_oop f, double value)
  63 {
  64     ST_FLOAT (f)->value = value;
  65 }
  66
  67 INLINE bool
  68 st_float_equal (st_oop object, st_oop other)
  69 {
  70     if (st_object_class (other) != st_float_class)
  71         return false;
  72
  73     return st_float_value (object) == st_float_value (other);
  74 }
  75
  76 INLINE st_uint
  77 st_float_hash (st_oop object)
  78 {
  79     return (st_uint) st_float_value (object);
  80 }
  81
  82
  83 #endif /* __ST_FLOAT_H__ */