base/number.c

   1 /*
   2  * Copyright (c) 2010 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "baselocl.h"
  37
  38 static void
  39 number_dealloc(void *ptr)
  40 {
  41 }
  42
  43 static int
  44 number_cmp(void *a, void *b)
  45 {
  46     int na, nb;
  47
  48     if (heim_base_is_tagged_object(a))
  49         na = heim_base_tagged_object_value(a);
  50     else
  51         na = *(int *)a;
  52
  53     if (heim_base_is_tagged_object(b))
  54         nb = heim_base_tagged_object_value(b);
  55     else
  56         nb = *(int *)b;
  57
  58     return na - nb;
  59 }
  60
  61 static unsigned long
  62 number_hash(void *ptr)
  63 {
  64     if (heim_base_is_tagged_object(ptr))
  65         return heim_base_tagged_object_value(ptr);
  66     return (unsigned long)*(int *)ptr;
  67 }
  68
  69 struct heim_type_data _heim_number_object = {
  70     HEIM_TID_NUMBER,
  71     "number-object",
  72     NULL,
  73     number_dealloc,
  74     NULL,
  75     number_cmp,
  76     number_hash,
  77     NULL
  78 };
  79
  80 /**
  81  * Create a number object
  82  *
  83  * @param the number to contain in the object
  84  *
  85  * @return a number object
  86  */
  87
  88 heim_number_t
  89 heim_number_create(int number)
  90 {
  91     heim_number_t n;
  92
  93     if (number < 0xffffff && number >= 0)
  94         return heim_base_make_tagged_object(number, HEIM_TID_NUMBER);
  95
  96     n = _heim_alloc_object(&_heim_number_object, sizeof(int));
  97     if (n)
  98         *((int *)n) = number;
  99     return n;
 100 }
 101
 102 /**
 103  * Return the type ID of number objects
 104  *
 105  * @return type id of number objects
 106  */
 107
 108 heim_tid_t
 109 heim_number_get_type_id(void)
 110 {
 111     return HEIM_TID_NUMBER;
 112 }
 113
 114 /**
 115  * Get the int value of the content
 116  *
 117  * @param number the number object to get the value from
 118  *
 119  * @return an int
 120  */
 121
 122 int
 123 heim_number_get_int(heim_number_t number)
 124 {
 125     if (heim_base_is_tagged_object(number))
 126         return heim_base_tagged_object_value(number);
 127     return *(int *)number;
 128 }