libkern/c++/OSNumber.cpp

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* IOOffset.m created by rsulack on Wed 17-Sep-1997 */
  31
  32 #include <sys/cdefs.h>
  33
  34 __BEGIN_DECLS
  35 extern unsigned long strtoul(const char *, char **, int);
  36 __END_DECLS
  37
  38 #include <libkern/c++/OSNumber.h>
  39 #include <libkern/c++/OSString.h>
  40 #include <libkern/c++/OSSerialize.h>
  41 #include <libkern/c++/OSLib.h>
  42
  43 #define sizeMask (~0ULL >> (64 - size))
  44
  45 #define super OSObject
  46
  47 OSDefineMetaClassAndStructors(OSNumber, OSObject)
  48
  49 OSMetaClassDefineReservedUnused(OSNumber, 0);
  50 OSMetaClassDefineReservedUnused(OSNumber, 1);
  51 OSMetaClassDefineReservedUnused(OSNumber, 2);
  52 OSMetaClassDefineReservedUnused(OSNumber, 3);
  53 OSMetaClassDefineReservedUnused(OSNumber, 4);
  54 OSMetaClassDefineReservedUnused(OSNumber, 5);
  55 OSMetaClassDefineReservedUnused(OSNumber, 6);
  56 OSMetaClassDefineReservedUnused(OSNumber, 7);
  57
  58 bool OSNumber::init(unsigned long long inValue, unsigned int numberOfBits)
  59 {
  60     if (!super::init())
  61         return false;
  62
  63     size = numberOfBits;
  64     value = (inValue & sizeMask);
  65
  66     return true;
  67 }
  68
  69 bool OSNumber::init(const char *value, unsigned int numberOfBits)
  70 {
  71     return init((unsigned long long)strtoul(value, NULL, 0), numberOfBits);
  72 }
  73
  74 void OSNumber::free() { super::free(); }
  75
  76 OSNumber *OSNumber::withNumber(unsigned long long value,
  77                            unsigned int numberOfBits)
  78 {
  79     OSNumber *me = new OSNumber;
  80
  81     if (me && !me->init(value, numberOfBits)) {
  82         me->release();
  83         return 0;
  84     }
  85
  86     return me;
  87 }
  88
  89 OSNumber *OSNumber::withNumber(const char *value, unsigned int numberOfBits)
  90 {
  91     OSNumber *me = new OSNumber;
  92
  93     if (me && !me->init(value, numberOfBits)) {
  94         me->release();
  95         return 0;
  96     }
  97
  98     return me;
  99 }
 100
 101 unsigned int OSNumber::numberOfBits() const { return size; }
 102
 103 unsigned int OSNumber::numberOfBytes() const { return (size + 7) / 8; }
 104
 105
 106 unsigned char OSNumber::unsigned8BitValue() const
 107 {
 108     return (unsigned char) value;
 109 }
 110
 111 unsigned short OSNumber::unsigned16BitValue() const
 112 {
 113     return (unsigned short) value;
 114 }
 115
 116 unsigned int OSNumber::unsigned32BitValue() const
 117 {
 118     return (unsigned int) value;
 119 }
 120
 121 unsigned long long OSNumber::unsigned64BitValue() const
 122 {
 123     return value;
 124 }
 125
 126 void OSNumber::addValue(signed long long inValue)
 127 {
 128     value = ((value + inValue) & sizeMask);
 129 }
 130
 131 void OSNumber::setValue(unsigned long long inValue)
 132 {
 133     value = (inValue & sizeMask);
 134 }
 135
 136 bool OSNumber::isEqualTo(const OSNumber *integer) const
 137 {
 138     return((value == integer->value));
 139 }
 140
 141 bool OSNumber::isEqualTo(const OSMetaClassBase *obj) const
 142 {
 143     OSNumber *  offset;
 144     if ((offset = OSDynamicCast(OSNumber, obj)))
 145         return isEqualTo(offset);
 146     else
 147         return false;
 148 }
 149
 150 bool OSNumber::serialize(OSSerialize *s) const
 151 {
 152     char temp[32];
 153
 154     if (s->previouslySerialized(this)) return true;
 155
 156     sprintf(temp, "integer size=\"%d\"", size);
 157     if (!s->addXMLStartTag(this, temp)) return false;
 158
 159     //XXX    sprintf(temp, "0x%qx", value);
 160     if ((value >> 32)) {
 161         sprintf(temp, "0x%lx%08lx", (unsigned long)(value >> 32),
 162                     (unsigned long)(value & 0xFFFFFFFF));
 163     } else {
 164         sprintf(temp, "0x%lx", (unsigned long)value);
 165     }
 166     if (!s->addString(temp)) return false;
 167
 168     return s->addXMLEndTag("integer");
 169 }