libkern/c++/OSNumber.cpp

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* IOOffset.m created by rsulack on Wed 17-Sep-1997 */
  26
  27 #include <sys/cdefs.h>
  28
  29 __BEGIN_DECLS
  30 extern int sscanf(const char *input, const char *fmt, ...);
  31 __END_DECLS
  32
  33 #include <libkern/c++/OSNumber.h>
  34 #include <libkern/c++/OSString.h>
  35 #include <libkern/c++/OSSerialize.h>
  36 #include <libkern/c++/OSLib.h>
  37
  38 #define sizeMask (~0ULL >> (64 - size))
  39
  40 #define super OSObject
  41
  42 OSDefineMetaClassAndStructors(OSNumber, OSObject)
  43
  44 OSMetaClassDefineReservedUnused(OSNumber, 0);
  45 OSMetaClassDefineReservedUnused(OSNumber, 1);
  46 OSMetaClassDefineReservedUnused(OSNumber, 2);
  47 OSMetaClassDefineReservedUnused(OSNumber, 3);
  48 OSMetaClassDefineReservedUnused(OSNumber, 4);
  49 OSMetaClassDefineReservedUnused(OSNumber, 5);
  50 OSMetaClassDefineReservedUnused(OSNumber, 6);
  51 OSMetaClassDefineReservedUnused(OSNumber, 7);
  52
  53 bool OSNumber::init(unsigned long long inValue, unsigned int numberOfBits)
  54 {
  55     if (!super::init())
  56         return false;
  57
  58     size = numberOfBits;
  59     value = (inValue & sizeMask);
  60
  61     return true;
  62 }
  63
  64 bool OSNumber::init(const char *value, unsigned int numberOfBits)
  65 {
  66     unsigned long long thisOffset;
  67
  68 #ifdef q_works
  69     sscanf(value, "%qi", thisOffset);
  70 #else
  71     unsigned int smallOffset;
  72
  73     sscanf(value, "%i", &smallOffset);
  74     thisOffset = smallOffset;
  75 #endif
  76
  77     return init(thisOffset, numberOfBits);
  78 }
  79
  80 void OSNumber::free() { super::free(); }
  81
  82 OSNumber *OSNumber::withNumber(unsigned long long value,
  83                            unsigned int numberOfBits)
  84 {
  85     OSNumber *me = new OSNumber;
  86
  87     if (me && !me->init(value, numberOfBits)) {
  88         me->release();
  89         return 0;
  90     }
  91
  92     return me;
  93 }
  94
  95 OSNumber *OSNumber::withNumber(const char *value, unsigned int numberOfBits)
  96 {
  97     OSNumber *me = new OSNumber;
  98
  99     if (me && !me->init(value, numberOfBits)) {
 100         me->release();
 101         return 0;
 102     }
 103
 104     return me;
 105 }
 106
 107 unsigned int OSNumber::numberOfBits() const { return size; }
 108
 109 unsigned int OSNumber::numberOfBytes() const { return (size + 7) / 8; }
 110
 111
 112 unsigned char OSNumber::unsigned8BitValue() const
 113 {
 114     return (unsigned char) value;
 115 }
 116
 117 unsigned short OSNumber::unsigned16BitValue() const
 118 {
 119     return (unsigned short) value;
 120 }
 121
 122 unsigned int OSNumber::unsigned32BitValue() const
 123 {
 124     return (unsigned int) value;
 125 }
 126
 127 unsigned long long OSNumber::unsigned64BitValue() const
 128 {
 129     return value;
 130 }
 131
 132 void OSNumber::addValue(signed long long inValue)
 133 {
 134     value = ((value + inValue) & sizeMask);
 135 }
 136
 137 void OSNumber::setValue(unsigned long long inValue)
 138 {
 139     value = (inValue & sizeMask);
 140 }
 141
 142 bool OSNumber::isEqualTo(const OSNumber *integer) const
 143 {
 144     return((value == integer->value));
 145 }
 146
 147 bool OSNumber::isEqualTo(const OSMetaClassBase *obj) const
 148 {
 149     OSNumber *  offset;
 150     if ((offset = OSDynamicCast(OSNumber, obj)))
 151         return isEqualTo(offset);
 152     else
 153         return false;
 154 }
 155
 156 bool OSNumber::serialize(OSSerialize *s) const
 157 {
 158     char temp[32];
 159
 160     if (s->previouslySerialized(this)) return true;
 161
 162     sprintf(temp, "integer size=\"%d\"", size);
 163     if (!s->addXMLStartTag(this, temp)) return false;
 164
 165     //XXX    sprintf(temp, "0x%qx", value);
 166     if ((value >> 32)) {
 167         sprintf(temp, "0x%lx%08lx", (unsigned long)(value >> 32),
 168                     (unsigned long)(value & 0xFFFFFFFF));
 169     } else {
 170         sprintf(temp, "0x%lx", (unsigned long)value);
 171     }
 172     if (!s->addString(temp)) return false;
 173
 174     return s->addXMLEndTag("integer");
 175 }