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Annotation of XNU/libkern/c++/OSSerialize.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: /* OSSerialize.cpp created by rsulack on Wen 25-Nov-1998 */
        !            23: 
        !            24: #include <libkern/c++/OSContainers.h>
        !            25: #include <libkern/c++/OSLib.h>
        !            26: #include <libkern/c++/OSDictionary.h>
        !            27: 
        !            28: #define super OSObject
        !            29: 
        !            30: OSDefineMetaClassAndStructors(OSSerialize, OSObject)
        !            31: 
        !            32: #ifdef DEBUG
        !            33: extern "C" {
        !            34:     extern int debug_container_malloc_size;
        !            35: };
        !            36: #define ACCUMSIZE(s) do { debug_container_malloc_size += (s); } while(0)
        !            37: #else
        !            38: #define ACCUMSIZE(s)
        !            39: #endif
        !            40: 
        !            41: char * OSSerialize::text() const
        !            42: {
        !            43:        return data;
        !            44: }
        !            45: 
        !            46: void OSSerialize::clearText()
        !            47: {
        !            48:        bzero((void *)data, capacity);
        !            49:        length = 1;
        !            50:        tag = 0;
        !            51:        tags->flushCollection();
        !            52: }
        !            53: 
        !            54: bool OSSerialize::previouslySerialized(const OSObject* o)
        !            55: {
        !            56:        char temp[16];
        !            57:        OSString *tagString;
        !            58: 
        !            59:        // look it up
        !            60:        tagString = (OSString *)tags->getObject((const OSSymbol *) o);
        !            61: 
        !            62:        // does it exist?
        !            63:        if (tagString) {
        !            64:                addString("<reference IDREF=\"");
        !            65:                addString(tagString->getCStringNoCopy());
        !            66:                addString("\"/>");
        !            67:                return true;
        !            68:        }
        !            69: 
        !            70:        // build a tag
        !            71:        sprintf(temp, "%u", tag++);
        !            72:        tagString = OSString::withCString(temp);
        !            73: 
        !            74:        // add to tag dictionary
        !            75:         tags->setObject((const OSSymbol *) o, tagString);// XXX check return
        !            76:        tagString->release();
        !            77: 
        !            78:        return false;
        !            79: }
        !            80: 
        !            81: bool OSSerialize::addXMLStartTag(const OSObject *o, const char *tagString)
        !            82: {
        !            83: 
        !            84:        if (!addChar('<')) return false;
        !            85:        if (!addString(tagString)) return false;
        !            86:        if (!addString(" ID=\"")) return false;
        !            87:        if (!addString(((OSString *)tags->getObject((const OSSymbol *)o))->getCStringNoCopy())) 
        !            88:                return false;
        !            89:        if (!addChar('\"')) return false;
        !            90:        if (!addChar('>')) return false;
        !            91:        return true;
        !            92: }
        !            93: 
        !            94: bool OSSerialize::addXMLEndTag(const char *tagString)
        !            95: {
        !            96: 
        !            97:        if (!addChar('<')) return false;
        !            98:        if (!addChar('/')) return false;
        !            99:        if (!addString(tagString)) return false;
        !           100:        if (!addChar('>')) return false;
        !           101:        return true;
        !           102: }
        !           103: 
        !           104: bool OSSerialize::addChar(const char c)
        !           105: {
        !           106:        // add char, possibly extending our capacity
        !           107:        if (length >= capacity && length >=ensureCapacity(capacity+capacityIncrement))
        !           108:                return false;
        !           109: 
        !           110:        data[length - 1] = c;
        !           111:        length++;
        !           112:  
        !           113:        return true;
        !           114: }
        !           115: 
        !           116: bool OSSerialize::addString(const char *s)
        !           117: {
        !           118:        bool rc = false;
        !           119: 
        !           120:        while (*s && (rc = addChar(*s++))) ;
        !           121: 
        !           122:        return rc;
        !           123: }
        !           124: 
        !           125: bool OSSerialize::initWithCapacity(unsigned int inCapacity)
        !           126: {
        !           127:        if (!super::init())
        !           128:                return false;
        !           129: 
        !           130:        tags = OSDictionary::withCapacity(32);
        !           131:        if (!tags) {
        !           132:                return false;
        !           133:        }
        !           134: 
        !           135:        data = (char *) kalloc(inCapacity);
        !           136:        if (!data) {
        !           137:                tags->release();
        !           138:                return false;
        !           139:        }
        !           140:        bzero((void *)data, inCapacity);
        !           141: 
        !           142:        tag = 0;
        !           143:        length = 1;
        !           144:        capacity = inCapacity;
        !           145:        capacityIncrement = inCapacity;
        !           146: 
        !           147: 
        !           148:        ACCUMSIZE(capacity);
        !           149: 
        !           150:        return true;
        !           151: }
        !           152: 
        !           153: OSSerialize *OSSerialize::withCapacity(unsigned int inCapacity)
        !           154: {
        !           155:        OSSerialize *me = new OSSerialize;
        !           156: 
        !           157:        if (me && !me->initWithCapacity(inCapacity)) {
        !           158:                me->free();
        !           159:                return 0;
        !           160:        }
        !           161: 
        !           162:        return me;
        !           163: }
        !           164: 
        !           165: unsigned int OSSerialize::getLength() const { return length; }
        !           166: unsigned int OSSerialize::getCapacity() const { return capacity; }
        !           167: unsigned int OSSerialize::getCapacityIncrement() const { return capacityIncrement; }
        !           168: unsigned int OSSerialize::setCapacityIncrement(unsigned int increment)
        !           169: {
        !           170:        return capacityIncrement = increment;
        !           171: }
        !           172: 
        !           173: unsigned int OSSerialize::ensureCapacity(unsigned int newCapacity)
        !           174: {
        !           175:        char *newData;
        !           176:        unsigned int oldCapacity;
        !           177: 
        !           178:        if (!capacityIncrement || newCapacity <= capacity)
        !           179:                return capacity;
        !           180: 
        !           181:        // round up
        !           182:        newCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
        !           183:                 * capacityIncrement;
        !           184: 
        !           185:        newData = (char *) kalloc(newCapacity);
        !           186:        if (newData) {
        !           187:                oldCapacity = capacity;
        !           188: 
        !           189:                ACCUMSIZE(newCapacity - oldCapacity);
        !           190: 
        !           191:                bcopy(data, newData, oldCapacity);
        !           192:                bzero(&newData[capacity], newCapacity - oldCapacity);
        !           193:                kfree((vm_offset_t)data, oldCapacity);
        !           194:                data = newData;
        !           195:                capacity = newCapacity;
        !           196:        }
        !           197: 
        !           198:        return capacity;
        !           199: }
        !           200: 
        !           201: void OSSerialize::free()
        !           202: {
        !           203:        if (tags)
        !           204:                tags->release();
        !           205: 
        !           206:        if (data) {
        !           207:                kfree((vm_offset_t)data, capacity);
        !           208:                ACCUMSIZE( -capacity );
        !           209:        }
        !           210:        super::free();
        !           211: }
        !           212: 
        !           213: 
        !           214: OSDefineMetaClassAndStructors(OSSerializer, OSObject)
        !           215: 
        !           216: OSSerializer * OSSerializer::forTarget( void * target,
        !           217:                                OSSerializerCallback callback, void * ref = 0 )
        !           218: {
        !           219:     OSSerializer * thing;
        !           220: 
        !           221:     thing = new OSSerializer;
        !           222:     if( thing && !thing->init()) {
        !           223:        thing->release();
        !           224:        thing = 0;
        !           225:     }
        !           226: 
        !           227:     if( thing) {
        !           228:        thing->target   = target;
        !           229:         thing->ref     = ref;
        !           230:         thing->callback = callback;
        !           231:     }
        !           232:     return( thing );
        !           233: }
        !           234: 
        !           235: bool OSSerializer::serialize( OSSerialize * s ) const
        !           236: {
        !           237:     return( (*callback)(target, ref, s) );
        !           238: }

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