#include <string.h>
__BEGIN_DECLS
#include <vm/vm_kern.h>
__END_DECLS
#define LIBKERN_SMART_POINTERS
#include <libkern/c++/OSData.h>
#include <libkern/c++/OSSerialize.h>
#include <libkern/c++/OSLib.h>
#include <libkern/c++/OSString.h>
#include <IOKit/IOLib.h>
#define super OSObject
OSDefineMetaClassAndStructors(OSData, OSObject)
OSMetaClassDefineReservedUsed(OSData, 0); OSMetaClassDefineReservedUnused(OSData, 1);
OSMetaClassDefineReservedUnused(OSData, 2);
OSMetaClassDefineReservedUnused(OSData, 3);
OSMetaClassDefineReservedUnused(OSData, 4);
OSMetaClassDefineReservedUnused(OSData, 5);
OSMetaClassDefineReservedUnused(OSData, 6);
OSMetaClassDefineReservedUnused(OSData, 7);
#define EXTERNAL ((unsigned int) -1)
bool
OSData::initWithCapacity(unsigned int inCapacity)
{
if (data) {
OSCONTAINER_ACCUMSIZE(-((size_t)capacity));
if (!inCapacity || (capacity < inCapacity)) {
if (capacity < page_size) {
kfree(data, capacity);
} else {
kmem_free(kernel_map, (vm_offset_t)data, capacity);
}
data = NULL;
capacity = 0;
}
}
if (!super::init()) {
return false;
}
if (inCapacity && !data) {
if (inCapacity < page_size) {
data = (void *) kalloc_container(inCapacity);
} else {
kern_return_t kr;
if (round_page_overflow(inCapacity, &inCapacity)) {
kr = KERN_RESOURCE_SHORTAGE;
} else {
kr = kmem_alloc(kernel_map, (vm_offset_t *)&data, inCapacity, IOMemoryTag(kernel_map));
}
if (KERN_SUCCESS != kr) {
data = NULL;
}
}
if (!data) {
return false;
}
capacity = inCapacity;
}
OSCONTAINER_ACCUMSIZE(capacity);
length = 0;
if (inCapacity < 16) {
capacityIncrement = 16;
} else {
capacityIncrement = inCapacity;
}
return true;
}
bool
OSData::initWithBytes(const void *bytes, unsigned int inLength)
{
if ((inLength && !bytes) || !initWithCapacity(inLength)) {
return false;
}
if (bytes != data) {
bcopy(bytes, data, inLength);
}
length = inLength;
return true;
}
bool
OSData::initWithBytesNoCopy(void *bytes, unsigned int inLength)
{
if (!super::init()) {
return false;
}
length = inLength;
capacity = EXTERNAL;
data = bytes;
return true;
}
bool
OSData::initWithData(const OSData *inData)
{
return initWithBytes(inData->data, inData->length);
}
bool
OSData::initWithData(const OSData *inData,
unsigned int start, unsigned int inLength)
{
const void *localData = inData->getBytesNoCopy(start, inLength);
if (localData) {
return initWithBytes(localData, inLength);
} else {
return false;
}
}
OSDataPtr
OSData::withCapacity(unsigned int inCapacity)
{
OSDataPtr me = OSDataPtr::alloc();
if (me && !me->initWithCapacity(inCapacity)) {
return nullptr;
}
return me;
}
OSDataPtr
OSData::withBytes(const void *bytes, unsigned int inLength)
{
OSDataPtr me = OSDataPtr::alloc();
if (me && !me->initWithBytes(bytes, inLength)) {
return nullptr;
}
return me;
}
OSDataPtr
OSData::withBytesNoCopy(void *bytes, unsigned int inLength)
{
OSDataPtr me = OSDataPtr::alloc();
if (me && !me->initWithBytesNoCopy(bytes, inLength)) {
return nullptr;
}
return me;
}
OSDataPtr
OSData::withData(const OSData *inData)
{
OSDataPtr me = OSDataPtr::alloc();
if (me && !me->initWithData(inData)) {
return nullptr;
}
return me;
}
OSDataPtr
OSData::withData(const OSData *inData,
unsigned int start, unsigned int inLength)
{
OSDataPtr me = OSDataPtr::alloc();
if (me && !me->initWithData(inData, start, inLength)) {
return nullptr;
}
return me;
}
void
OSData::free()
{
if ((capacity != EXTERNAL) && data && capacity) {
if (capacity < page_size) {
kfree(data, capacity);
} else {
kmem_free(kernel_map, (vm_offset_t)data, capacity);
}
OSCONTAINER_ACCUMSIZE( -((size_t)capacity));
} else if (capacity == EXTERNAL) {
DeallocFunction freemem = reserved ? reserved->deallocFunction : NULL;
if (freemem && data && length) {
freemem(data, length);
}
}
if (reserved) {
kfree(reserved, sizeof(ExpansionData));
}
super::free();
}
unsigned int
OSData::getLength() const
{
return length;
}
unsigned int
OSData::getCapacity() const
{
return capacity;
}
unsigned int
OSData::getCapacityIncrement() const
{
return capacityIncrement;
}
unsigned int
OSData::setCapacityIncrement(unsigned increment)
{
return capacityIncrement = increment;
}
unsigned int
OSData::ensureCapacity(unsigned int newCapacity)
{
unsigned char * newData;
unsigned int finalCapacity;
void * copydata;
kern_return_t kr;
if (newCapacity <= capacity) {
return capacity;
}
finalCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
* capacityIncrement;
if (finalCapacity < newCapacity) {
return capacity;
}
copydata = data;
if (finalCapacity >= page_size) {
finalCapacity = round_page_32(finalCapacity);
if (finalCapacity < newCapacity) {
return capacity;
}
if (capacity >= page_size) {
copydata = NULL;
kr = kmem_realloc(kernel_map,
(vm_offset_t)data,
capacity,
(vm_offset_t *)&newData,
finalCapacity,
IOMemoryTag(kernel_map));
} else {
kr = kmem_alloc(kernel_map, (vm_offset_t *)&newData, finalCapacity, IOMemoryTag(kernel_map));
}
if (KERN_SUCCESS != kr) {
newData = NULL;
}
} else {
newData = (unsigned char *) kalloc_container(finalCapacity);
}
if (newData) {
bzero(newData + capacity, finalCapacity - capacity);
if (copydata) {
bcopy(copydata, newData, capacity);
}
if (data) {
if (capacity < page_size) {
kfree(data, capacity);
} else {
kmem_free(kernel_map, (vm_offset_t)data, capacity);
}
}
OSCONTAINER_ACCUMSIZE(((size_t)finalCapacity) - ((size_t)capacity));
data = (void *) newData;
capacity = finalCapacity;
}
return capacity;
}
bool
OSData::appendBytes(const void *bytes, unsigned int inLength)
{
unsigned int newSize;
if (!inLength) {
return true;
}
if (capacity == EXTERNAL) {
return false;
}
if (os_add_overflow(length, inLength, &newSize)) {
return false;
}
if ((newSize > capacity) && newSize > ensureCapacity(newSize)) {
return false;
}
if (bytes) {
bcopy(bytes, &((unsigned char *)data)[length], inLength);
} else {
bzero(&((unsigned char *)data)[length], inLength);
}
length = newSize;
return true;
}
bool
OSData::appendByte(unsigned char byte, unsigned int inLength)
{
unsigned int newSize;
if (!inLength) {
return true;
}
if (capacity == EXTERNAL) {
return false;
}
if (os_add_overflow(length, inLength, &newSize)) {
return false;
}
if ((newSize > capacity) && newSize > ensureCapacity(newSize)) {
return false;
}
memset(&((unsigned char *)data)[length], byte, inLength);
length = newSize;
return true;
}
bool
OSData::appendBytes(const OSData *other)
{
return appendBytes(other->data, other->length);
}
const void *
OSData::getBytesNoCopy() const
{
if (!length) {
return NULL;
} else {
return data;
}
}
const void *
OSData::getBytesNoCopy(unsigned int start,
unsigned int inLength) const
{
const void *outData = NULL;
if (length
&& start < length
&& (start + inLength) >= inLength && (start + inLength) <= length) {
outData = (const void *) ((char *) data + start);
}
return outData;
}
bool
OSData::isEqualTo(const OSData *aData) const
{
unsigned int len;
len = aData->length;
if (length != len) {
return false;
}
return isEqualTo(aData->data, len);
}
bool
OSData::isEqualTo(const void *someData, unsigned int inLength) const
{
return (length >= inLength) && (bcmp(data, someData, inLength) == 0);
}
bool
OSData::isEqualTo(const OSMetaClassBase *obj) const
{
OSData * otherData;
OSString * str;
if ((otherData = OSDynamicCast(OSData, obj))) {
return isEqualTo(otherData);
} else if ((str = OSDynamicCast(OSString, obj))) {
return isEqualTo(str);
} else {
return false;
}
}
bool
OSData::isEqualTo(const OSString *obj) const
{
const char * aCString;
char * dataPtr;
unsigned int checkLen = length;
unsigned int stringLen;
if (!obj) {
return false;
}
stringLen = obj->getLength();
dataPtr = (char *)data;
if (stringLen != checkLen) {
if ((checkLen - stringLen) == 1) {
if (dataPtr[checkLen - 1] != 0) { return false;
}
checkLen--;
} else {
return false;
}
}
aCString = obj->getCStringNoCopy();
for (unsigned int i = 0; i < checkLen; i++) {
if (*dataPtr++ != aCString[i]) {
return false;
}
}
return true;
}
static const char __CFPLDataEncodeTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
bool
OSData::serialize(OSSerialize *s) const
{
unsigned int i;
const unsigned char *p;
unsigned char c;
unsigned int serializeLength;
if (s->previouslySerialized(this)) {
return true;
}
if (!s->addXMLStartTag(this, "data")) {
return false;
}
serializeLength = length;
if (reserved && reserved->disableSerialization) {
serializeLength = 0;
}
for (i = 0, p = (unsigned char *)data; i < serializeLength; i++, p++) {
switch (i % 3) {
case 0:
c = __CFPLDataEncodeTable[((p[0] >> 2) & 0x3f)];
if (!s->addChar(c)) {
return false;
}
break;
case 1:
c = __CFPLDataEncodeTable[((((p[-1] << 8) | p[0]) >> 4) & 0x3f)];
if (!s->addChar(c)) {
return false;
}
break;
case 2:
c = __CFPLDataEncodeTable[((((p[-1] << 8) | p[0]) >> 6) & 0x3f)];
if (!s->addChar(c)) {
return false;
}
c = __CFPLDataEncodeTable[(p[0] & 0x3f)];
if (!s->addChar(c)) {
return false;
}
break;
}
}
switch (i % 3) {
case 0:
break;
case 1:
c = __CFPLDataEncodeTable[((p[-1] << 4) & 0x30)];
if (!s->addChar(c)) {
return false;
}
if (!s->addChar('=')) {
return false;
}
if (!s->addChar('=')) {
return false;
}
break;
case 2:
c = __CFPLDataEncodeTable[((p[-1] << 2) & 0x3c)];
if (!s->addChar(c)) {
return false;
}
if (!s->addChar('=')) {
return false;
}
break;
}
return s->addXMLEndTag("data");
}
void
OSData::setDeallocFunction(DeallocFunction func)
{
if (!reserved) {
reserved = (typeof(reserved))kalloc_container(sizeof(ExpansionData));
if (!reserved) {
return;
}
bzero(reserved, sizeof(ExpansionData));
}
reserved->deallocFunction = func;
}
void
OSData::setSerializable(bool serializable)
{
if (!reserved) {
reserved = (typeof(reserved))kalloc_container(sizeof(ExpansionData));
if (!reserved) {
return;
}
bzero(reserved, sizeof(ExpansionData));
}
reserved->disableSerialization = (!serializable);
}
bool
OSData::isSerializable(void)
{
return !reserved || !reserved->disableSerialization;
}