libkern/c++/OSNumber.cpp

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* IOOffset.m created by rsulack on Wed 17-Sep-1997 */
  23
  24 #include <libkern/c++/OSNumber.h>
  25 #include <libkern/c++/OSString.h>
  26 #include <libkern/c++/OSSerialize.h>
  27 #include <libkern/c++/OSLib.h>
  28
  29 #define sizeMask (~0ULL >> (64 - size))
  30
  31 #define super OSObject
  32
  33 OSDefineMetaClassAndStructors(OSNumber, OSObject)
  34 OSMetaClassDefineReservedUnused(OSNumber, 0);
  35 OSMetaClassDefineReservedUnused(OSNumber, 1);
  36 OSMetaClassDefineReservedUnused(OSNumber, 2);
  37 OSMetaClassDefineReservedUnused(OSNumber, 3);
  38 OSMetaClassDefineReservedUnused(OSNumber, 4);
  39 OSMetaClassDefineReservedUnused(OSNumber, 5);
  40 OSMetaClassDefineReservedUnused(OSNumber, 6);
  41 OSMetaClassDefineReservedUnused(OSNumber, 7);
  42
  43 bool OSNumber::init(unsigned long long inValue, unsigned int numberOfBits)
  44 {
  45     if (!super::init())
  46         return false;
  47
  48     size = numberOfBits;
  49     value = (inValue & sizeMask);
  50
  51     return true;
  52 }
  53
  54 bool OSNumber::init(const char *value, unsigned int numberOfBits)
  55 {
  56     unsigned long long thisOffset;
  57
  58 #ifdef q_works
  59     sscanf(value, "%qi", thisOffset);
  60 #else
  61     unsigned int smallOffset;
  62
  63     sscanf(value, "%i", &smallOffset);
  64     thisOffset = smallOffset;
  65 #endif
  66
  67     return init(thisOffset, numberOfBits);
  68 }
  69
  70 void OSNumber::free() { super::free(); }
  71
  72 OSNumber *OSNumber::withNumber(unsigned long long value,
  73                            unsigned int numberOfBits)
  74 {
  75     OSNumber *me = new OSNumber;
  76
  77     if (me && !me->init(value, numberOfBits)) {
  78         me->free();
  79         return 0;
  80     }
  81
  82     return me;
  83 }
  84
  85 OSNumber *OSNumber::withNumber(const char *value, unsigned int numberOfBits)
  86 {
  87     OSNumber *me = new OSNumber;
  88
  89     if (me && !me->init(value, numberOfBits)) {
  90         me->free();
  91         return 0;
  92     }
  93
  94     return me;
  95 }
  96
  97 unsigned int OSNumber::numberOfBits() const { return size; }
  98
  99 unsigned int OSNumber::numberOfBytes() const { return (size + 7) / 8; }
 100
 101
 102 unsigned char OSNumber::unsigned8BitValue() const
 103 {
 104     return (unsigned char) value;
 105 }
 106
 107 unsigned short OSNumber::unsigned16BitValue() const
 108 {
 109     return (unsigned short) value;
 110 }
 111
 112 unsigned int OSNumber::unsigned32BitValue() const
 113 {
 114     return (unsigned int) value;
 115 }
 116
 117 unsigned long long OSNumber::unsigned64BitValue() const
 118 {
 119     return value;
 120 }
 121
 122 void OSNumber::addValue(signed long long inValue)
 123 {
 124     value = ((value + inValue) & sizeMask);
 125 }
 126
 127 void OSNumber::setValue(unsigned long long inValue)
 128 {
 129     value = (inValue & sizeMask);
 130 }
 131
 132 bool OSNumber::isEqualTo(const OSNumber *integer) const
 133 {
 134     return((value == integer->value));
 135 }
 136
 137 bool OSNumber::isEqualTo(const OSMetaClassBase *obj) const
 138 {
 139     OSNumber *  offset;
 140     if ((offset = OSDynamicCast(OSNumber, obj)))
 141         return isEqualTo(offset);
 142     else
 143         return false;
 144 }
 145
 146 bool OSNumber::serialize(OSSerialize *s) const
 147 {
 148     char temp[32];
 149
 150     if (s->previouslySerialized(this)) return true;
 151
 152     sprintf(temp, "integer size=\"%d\"", size);
 153     if (!s->addXMLStartTag(this, temp)) return false;
 154
 155     //XXX    sprintf(temp, "0x%qx", value);
 156     if ((value >> 32)) {
 157         sprintf(temp, "0x%lx%08lx", (unsigned long)(value >> 32),
 158                     (unsigned long)(value & 0xFFFFFFFF));
 159     } else {
 160         sprintf(temp, "0x%lx", (unsigned long)value);
 161     }
 162     if (!s->addString(temp)) return false;
 163
 164     return s->addXMLEndTag("integer");
 165 }