???Java????C++???????????
???????????? ???????[ 2013/4/17 9:53:25 ] ????????
???????????????п?????????????String?????????????????????????????????????????Java?е?String??????????C++?????????????string???????????String??????????????????
????1???????????????????????????????????????????????????????????????????????????????????
????2???????????C++????????????????????????????????????????????????????????
????3??Java??String???????÷?????????о???????????????????
??????????????????????????????????????У???????????к?????????????????????????????String?????о???????????????????????????????????????????????????????ó????????????????????????????????????????????
????????????????????getName()??????Ч?????????????????μ?String??????Ч??????STL?е?string???????????????????????ж????????????????????????????getName()???????????????????????????????????????????????????????????????????????????????????????????????????????????????·?????????????????????
????????????????????????????ò????μ?String?????????C++?б???????????????????----???ü????????????????????????????String??????????????????????????????
class String
{
public:
String();
String(const String& other);
String(const char* otherText);
... ... //??????????????????????????????
~String();
public:
const String& operator= (const String& other);
const String& operator= (const char* otherText);
const String& operator= (const char otherChar);
... ... //??????????????????????????????
public:
void append(const char* otherText??int count = -1);
bool isEmpty() const;
size_t length() const;
... ... //??????з?????????????????
private:
class InnerRefCountedString : public RefCountedBase
{
public:
InnerRefCountedString(const size_t count)
//(count+2)???????count?1????????????_containSize?0
:_containSize(calculateContainSize(count))??_count(count) {
_text = new char[_containSize + 1];
assert(_text);
}
virtual ~InnerRefCountedString() {
delete [] _text;
}
void copyData(const char* otherText?? const size_t count) {
assert(0 != otherText && count <= _containSize);
memcpy(_text??otherText??count);
_count = count;
_text[_count] = 0;
}
void appendData(const char* appendText?? const size_t appendCount) {
assert(0 != appendText && appendCount + _count <= _containSize);
memcpy(_text + _count??appendText??appendCount);
_count += appendCount;
_text[_count] = 0;
}
char* getText () const {
return _text;
}
static size_t calculateContainSize(const size_t s) {
return ((s + 2) >> 1) * 3;
}
... ... //???????????????????
private:
size_t _containSize;
size_t _count;
char* _text;
};
private:
typedef RefCountedPtr<InnerRefCountedString> SmartString;
SmartString _smartText; //?й??????????????
};
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2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
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2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
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2021/5/28 17:25:47??????APP??????????
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