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Annotation of XNU/libkern/c++/OSNumber.cpp, revision 1.1

1.1     ! root        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 ((1ULL << (size)) - 1)
        !            30: 
        !            31: #define super OSObject
        !            32: 
        !            33: OSDefineMetaClassAndStructors(OSNumber, OSObject)
        !            34: 
        !            35: bool OSNumber::init(unsigned long long inValue, unsigned int numberOfBits)
        !            36: {
        !            37:     if (!super::init())
        !            38:         return false;
        !            39: 
        !            40:     size = numberOfBits;
        !            41:     value = (inValue & sizeMask);
        !            42: 
        !            43:     return true;
        !            44: }
        !            45: 
        !            46: bool OSNumber::init(const char *value, unsigned int numberOfBits)
        !            47: {
        !            48:     unsigned long long thisOffset;
        !            49: 
        !            50: #ifdef q_works
        !            51:     sscanf(value, "%qi", thisOffset);
        !            52: #else
        !            53:     unsigned int smallOffset;
        !            54: 
        !            55:     sscanf(value, "%i", &smallOffset);
        !            56:     thisOffset = smallOffset;
        !            57: #endif
        !            58: 
        !            59:     return init(thisOffset, numberOfBits);
        !            60: }
        !            61: 
        !            62: void OSNumber::free() { super::free(); }
        !            63: 
        !            64: OSNumber *OSNumber::withNumber(unsigned long long value,
        !            65:                            unsigned int numberOfBits)
        !            66: {
        !            67:     OSNumber *me = new OSNumber;
        !            68: 
        !            69:     if (me && !me->init(value, numberOfBits)) {
        !            70:         me->free();
        !            71:         return 0;
        !            72:     }
        !            73: 
        !            74:     return me;
        !            75: }
        !            76: 
        !            77: OSNumber *OSNumber::withNumber(const char *value, unsigned int numberOfBits)
        !            78: {
        !            79:     OSNumber *me = new OSNumber;
        !            80: 
        !            81:     if (me && !me->init(value, numberOfBits)) {
        !            82:         me->free();
        !            83:         return 0;
        !            84:     }
        !            85: 
        !            86:     return me;
        !            87: }
        !            88: 
        !            89: unsigned int OSNumber::numberOfBits() const { return size; }
        !            90: 
        !            91: unsigned int OSNumber::numberOfBytes() const { return (size + 7) / 8; }
        !            92: 
        !            93: 
        !            94: unsigned char OSNumber::unsigned8BitValue() const
        !            95: {
        !            96:     return (unsigned char) value;
        !            97: }
        !            98: 
        !            99: unsigned short OSNumber::unsigned16BitValue() const
        !           100: {
        !           101:     return (unsigned short) value;
        !           102: }
        !           103: 
        !           104: unsigned int OSNumber::unsigned32BitValue() const
        !           105: {
        !           106:     return (unsigned int) value;
        !           107: }
        !           108: 
        !           109: unsigned long long OSNumber::unsigned64BitValue() const
        !           110: {
        !           111:     return value;
        !           112: }
        !           113: 
        !           114: void OSNumber::addValue(signed long long inValue)
        !           115: {
        !           116:     value = ((value + inValue) & sizeMask);
        !           117: }
        !           118: 
        !           119: void OSNumber::setValue(unsigned long long inValue)
        !           120: {
        !           121:     value = (inValue & sizeMask);
        !           122: }
        !           123: 
        !           124: bool OSNumber::isEqualTo(const OSNumber *integer) const
        !           125: {
        !           126:     return((value == integer->value));
        !           127: }
        !           128: 
        !           129: bool OSNumber::isEqualTo(const OSObject *obj) const
        !           130: {
        !           131:     OSNumber * offset;
        !           132:     if ((offset = OSDynamicCast(OSNumber, (OSObject *)obj )))
        !           133:        return isEqualTo(offset);
        !           134:     else
        !           135:        return false;
        !           136: }
        !           137: 
        !           138: bool OSNumber::serialize(OSSerialize *s) const
        !           139: {
        !           140:     char temp[32];
        !           141:     
        !           142:     if (s->previouslySerialized(this)) return true;
        !           143: 
        !           144:     sprintf(temp, "integer size=\"%d\"", size); 
        !           145:     if (!s->addXMLStartTag(this, temp)) return false;
        !           146:     
        !           147:     //XXX    sprintf(temp, "0x%qx", value);
        !           148:     if ((value >> 32)) {
        !           149:         sprintf(temp, "0x%lx%08lx", (unsigned long)(value >> 32),
        !           150:                     (unsigned long)(value & 0xFFFFFFFF));
        !           151:     } else { 
        !           152:         sprintf(temp, "0x%lx", (unsigned long)value);
        !           153:     }
        !           154:     if (!s->addString(temp)) return false;
        !           155: 
        !           156:     return s->addXMLEndTag("integer");
        !           157: }

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