json解析導致的崩潰問題 cocos2.* 底層問題

過程：

======

m_dropMsg->push("歡迎來到德州遊戲的世界");
m_dropMsg->push("<Root momoID=\"emVjSVQ2dkdBa0tYREI3N3ZteGtaZz09\"><p color=\"32,144,32\">[#%&#]:</p></Root>");

======

void DropMsg::push( const char* szMsg )
{
if (parse(szMsg) && m_configQueue.size() == 1)
{
start();
}
}

======

bool DropMsg::parse( const char* szMsg )
{
DropConfig dropConfig = parseConfig(szMsg);
CEmojiManager::shareEmojiManager()->pushNoitceList(dropConfig);
if(!m_configQueue.empty() && m_configQueue.back() == dropConfig)
{
return false;
}
if (!dropConfig.textVec.empty())
{
m_configQueue.push(dropConfig);
}
return true;
}

======

DropConfig DropMsg::parseConfig( const char* szData )
{
tinyxml2::XMLDocument doc;
XMLError error = doc.Parse(szData);
DropConfig dropConfig;
if (error == XML_NO_ERROR)
{
tinyxml2::XMLElement* pRoot = doc.FirstChildElement("Root");
if (pRoot)
{
tinyxml2::XMLElement* pElemet = pRoot->FirstChildElement("p");
if (pRoot->Attribute("time"))
{
dropConfig.dt = CCString::create(pRoot->Attribute("time"))->floatValue();
}
if (pRoot->Attribute("momoID"))
{
const char* szMomoID = CCString::create(pRoot->Attribute("momoID"))->getCString();
int len = strlen(szMomoID);
memcpy(dropConfig.momoID,szMomoID,len);
}
while (pElemet)
{
DropText textFormat;

if(!pElemet->GetText()){

CCLog("FUCK NULL POINT");
textFormat.strText="";
textFormat.color = ccc3(255,255,255);
}else{

textFormat.strText = pElemet->GetText();

if (pElemet->Attribute("msg"))
{
textFormat.strText = pElemet->Attribute("msg");
}

if (pElemet->Attribute("color"))
{
std::string strColor = pElemet->Attribute("color");

std::vector<std::string> aStringResult;
StringTool::split(string(strColor.c_str()),string(","),aStringResult);
textFormat.color = ccc3(CCString::create(aStringResult[0].c_str())->intValue(),CCString::create(aStringResult[1].c_str())->intValue(),CCString::create(aStringResult[2].c_str())->intValue());
}
if (pElemet->Attribute("size"))
{
textFormat.size = CCString::create(pElemet->Attribute("size"))->intValue();
}

if(!textFormat.strText.empty())
{
dropConfig.textVec.push_back(textFormat);
}
}
pElemet = pElemet->NextSiblingElement("p");
}
}
}else
{
DropText textFormat;
textFormat.strText = szData;
if (!textFormat.strText.empty())
{
dropConfig.textVec.push_back(textFormat);
}
}
return dropConfig;
}

======

const char* XMLElement::GetText() const
{
if ( FirstChild() && FirstChild()->ToText() ) {
return FirstChild()->ToText()->Value();
}
return 0;
}

=======

const char* Value() const {
return _value.GetStr();
}

直接掛裡面================================

const char* StrPair::GetStr()
{
if ( _flags & NEEDS_FLUSH ) {
*_end = 0;
_flags ^= NEEDS_FLUSH;
if ( _flags ) {
char* p = _start; // the read pointer
char* q = _start; // the write pointer
while( p < _end ) {
if ( (_flags & NEEDS_NEWLINE_NORMALIZATION) && *p == CR ) {
// CR-LF pair becomes LF
// CR alone becomes LF
// LF-CR becomes LF
if ( *(p+1) == LF ) {
p += 2;
}
else {
++p;
}
*q++ = LF;
}
else if ( (_flags & NEEDS_NEWLINE_NORMALIZATION) && *p == LF ) {
if ( *(p+1) == CR ) {
p += 2;
}
else {
++p;
}
*q++ = LF;
}
else if ( (_flags & NEEDS_ENTITY_PROCESSING) && *p == '&' ) {
// Entities handled by tinyXML2:
// - special entities in the entity table [in/out]
// - numeric character reference [in]
// 中 or 中
if ( *(p+1) == '#' ) {
char buf[10] = { 0 };
int len;
p = const_cast<char*>( XMLUtil::GetCharacterRef( p, buf, &len ) );//原因是因為進了這裡 &#**；轉義進了“&#”找不到“；”
// if(!p)
// return "*";
for( int i=0; i<len; ++i ) {
*q++ = buf[i];
}
TIXMLASSERT( q <= p );//================================================= 拋異常掛掉
}
else {
int i=0;
for(; i<NUM_ENTITIES; ++i ) {
if ( strncmp( p+1, entities[i].pattern, entities[i].length ) == 0
&& *(p+entities[i].length+1) == ';' ) {
// Found an entity convert;
*q = entities[i].value;
++q;
p += entities[i].length + 2;
break;
}
}
if ( i == NUM_ENTITIES ) {
// fixme: treat as error?
++p;
++q;
}
}
}
else {
*q = *p;
++p;
++q;
}
}
*q = 0;
}
// The loop below has plenty going on, and this
// is a less useful mode. Break it out.
if ( _flags & COLLAPSE_WHITESPACE ) {
CollapseWhitespace();
}
_flags = (_flags & NEEDS_DELETE);
}
return _start;
}

}

轉義處理：

{
// Presume an entity, and pull it out.
*length = 0;
if ( *(p+1) == '#' && *(p+2) ) {
unsigned long ucs = 0;
ptrdiff_t delta = 0;
unsigned mult = 1;
if ( *(p+2) == 'x' ) {
// Hexadecimal.
if ( !*(p+3) ) {
return 0;
}
const char* q = p+3;
q = strchr( q, ';' );
if ( !q || !*q ) {
return 0;
}
delta = q-p;
--q;
while ( *q != 'x' ) {
if ( *q >= '0' && *q <= '9' ) {
ucs += mult * (*q - '0');
}
else if ( *q >= 'a' && *q <= 'f' ) {
ucs += mult * (*q - 'a' + 10);
}
else if ( *q >= 'A' && *q <= 'F' ) {
ucs += mult * (*q - 'A' + 10 );
}
else {
return 0;
}
mult *= 16;
--q;
}
}
else {
// Decimal.
if ( !*(p+2) ) {
return 0;
}
const char* q = p+2;
q = strchr( q, ';' );
if ( !q || !*q ) {
return 0;
}
delta = q-p;
--q;
while ( *q != '#' ) {
if ( *q >= '0' && *q <= '9' ) {
ucs += mult * (*q - '0');
}
else {
return 0;
}
mult *= 10;
--q;
}
}
// convert the UCS to UTF-8
ConvertUTF32ToUTF8( ucs, value, length );
return p + delta + 1;
}
return p+1;
}

json解析導致的崩潰問題 cocos2.* 底層問題

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