软件架构设计之Utility模块——string

YKString类是对STL 中的std::wstring的功能扩展，没有什么好解释的了，就直接看代码吧。

头文件：

class YKString : public std::wstring{public:typedef std::wstring::size_typesize_type;YKString() : std::wstring() {}YKString(const std::wstring& str, size_type pos = 0, size_type n = npos): std::wstring(str, pos, n) {}YKString(const value_type* str) : std::wstring(str) {}YKString(const value_type* str, size_type n) : std::wstring(str, n) {}YKString(size_type n, value_type val) : std::wstring(n, val) {}YKString(value_type ch) : std::wstring(1, ch) {}YKString(const std::string& str) { Assign(str.c_str()); }YKString(const YK_CHAR* str) { Assign(str); }template <class InputIter>YKString(InputIter fIter, InputIter lIter) : std::wstring(fIter, lIter) { }~YKString() {}YKString& operator= (const value_type str){ assign(1, str); return *this; }YKString& operator= (const value_type* str){ assign(str); return *this; }YKString& operator= (const std::wstring& str){ assign(str.c_str()); return *this; }YKString& operator= (const std::string& str){ Assign(str.c_str()); return *this; }YKString& operator= (const YK_CHAR* str){ Assign(str); return *this; }YKString& operator+= (const YKString& str) { return (*this += str.c_str());}YKString& operator+= (const value_type* str){ append(str); return *this; }////////////////////////////////////////////////////////////////////////////非变更操作// 指定pos的字符是否为小写字母、pos==npos则是否全为小写字母YK_BOOL IsLower(size_type pos = npos) const;// 指定pos的字符是否为大写字母、pos==npos则是否全为大写字母YK_BOOL IsUpper(size_type pos = npos) const;// 指定pos的字符是否为数字、pos==npos则是否全为数字YK_BOOL IsNumeric(size_type pos = npos) const;// 指定pos的字符是否为字母（不分大小写）、pos==npos则是否全为字母（不分大小写）YK_BOOL IsAlpha(size_type pos = npos) const;// 指定pos的字符是否为字母或数字、pos==npos则是否全为字母或数字YK_BOOL IsAlnum(size_type pos = npos) const;// 指定pos的字符是否为空白字符、pos==npos则是否全为空白字符YK_BOOL IsBlank(size_type pos = npos) const;// 忽略大小写的比较两个字符串YK_INT iCompare(const YKString& rhs) const;// know-C++// 意义是将*this设置为const，即将this指针指向用来调用该成员函数的对象设置为const，那么该成员函数不可以修改这个对象// const成员函数只能调用const成员函数，不能调用非const成员函数// const成员函数可以调用成员变量，但是不能修改成员变量// const成员函数可以修改mutable修饰的成员变量；如果成员变量是指针的话，可以修改指针指向的变量的值////////////////////////////////////////////////////////////////////////////变更操作// 将字母全转为小写YKString& ToLower();// 将字母全转为大写YKString& ToUpper();// 以rVal替换所有lVal字符串YKString& Replace(const YKString& lVal, const YKString& rVal);// 去除字符串左边的空白字符void TrimLeft();// 去除字符串右边的空白字符void TrimRight();// 去除字符串左右两边的空白字符void Trim();// 字符串追加指定类型的值，precision为double型的精度template <typename T>void Append(T val, size_type precision = 0) {append(Format(val, precision).c_str());}///////////////////////////////////////////////////////////////////////////// 查找// 为find_first_of的忽略大小写版本size_type ifind_first_of(const YKString& str, size_type off = 0, size_type count = 0);// 为find_first_not_of的忽略大小写版本size_type ifind_first_not_of();// 为find_last_of的忽略大小写版本size_type ifind_last_of();// 为find_last_not_of的忽略大小写版本size_type ifind_last_not_of();// size_type find_nth();size_type ifind_nth();YKString find_head(const YKString& sep) const;YKString find_tail(const YKString& sep) const;//////////////////////////////////////////////////////////////////////////// 高级操作// 转换为stringstd::string ToString() const;// 将容器内的内容以sep字符串作为分隔符拼接// bPair = false，格式形如：XXXwstrSepXXX// bPari = true,格式形如：XXXwstrSepXXXwstrSeptemplate <typename T>static YKString Join(const T& container, const YKString& sep, YK_BOOL bPair = false) {T::const_iterator fIter = container.begin();T::const_iterator lIter = container.end();return Join(fIter, lIter, sep, bPair);}// 将迭代器内的内容以sep字符串作为分隔符拼接// bPair = false，格式形如：XXXwstrSepXXX// bPari = true,格式形如：XXXwstrSepXXXwstrSeptemplate <typename InputIter>static YKString Join(InputIter fIter, InputIter lIter, const YKString& sep, YK_BOOL bPair = false) {YKString strRt;for (; fIter != lIter; ++fIter){strRt.Append(*fIter);strRt.append(sep.c_str());}if (false == bPair && !strRt.empty()){strRt.erase(strRt.length() - sep.length());}return strRt;}// 将以sep分隔的字符串分解到vector容器中template <typename T>std::vector<T> Parse(const YKString& sep) const {std::vector<T> vecVal;size_type idxPre = 0;size_type idx = find(sep.c_str());while (idx != YKString::npos){YKString strTemp = substr(idxPre, idx-idxPre);vecVal.push_back(strTemp.Convert<T>());idx += sep.size();idxPre = idx;idx = find(sep, idx);}if (idxPre <= size() - sep.size()){YKString strTemp = substr(idxPre);vecVal.push_back(strTemp.Convert<T>());}return vecVal;}// 将值转换为YKString，可指定浮点数的格式化精度template <typename T>static YKString Format(T val, size_type precision = 0) {std::wostringstream stream;if (precision > 0){stream.precision(precision);stream.flags(std::wostringstream::fixed);}stream << val;return YKString(stream.str());}// 数字转为YKString，按宽度格式化，左边填充0static YKString FormatDigit(YK_LONG val, size_type width);// 将字符串里内容转换为指定的类型template <typename T>T Convert() const {try{return boost::lexical_cast<T>(c_str());}catch (boost::bad_lexical_cast&){if (!empty())// 字符串内存在不符合指定类型的字符assert(0);return T();// 空字符串返回类型的默认值}}// 将字符串里的RGB转换为整形值，字符串内容形式要求：（RGB(xxx,xxx,xxx)）YK_ULONG ConvertRGB();private:void Assign(const YK_CHAR* pChar);};

实现文件：

YK_BOOL YKString::IsLower( size_type pos /* = npos */ ) const{if (empty())return false;if (pos == npos){for (const_iterator i = begin(); i != end(); ++i){if (!std::islower(*i, std::locale()))return false;}}else{YKString strTemp = at(pos);return strTemp.IsLower();}return true;}YK_BOOL YKString::IsUpper( size_type pos /* = npos */ ) const{if (empty())return false;if (pos == npos){for (const_iterator i = begin(); i != end(); ++i){if (!std::isupper(*i, std::locale()))return false;}}else{YKString strTemp = at(pos);return strTemp.IsUpper();}return true;}YK_BOOL YKString::IsNumeric( size_type pos /* = npos */ ) const{if (empty())return false;if (pos == npos){for (const_iterator i = begin(); i != end(); ++i){if (!std::isdigit(*i, std::locale()))return false;}}else{YKString strTemp = at(pos);return strTemp.IsNumeric();}return true;}YK_BOOL YKString::IsAlpha( size_type pos /* = npos */ ) const {if (empty())return false;if (pos == npos){for (const_iterator i = begin(); i != end(); ++i){if (!std::isalpha(*i, std::locale()))return false;}}else{YKString strTemp = at(pos);return strTemp.IsAlpha();}return true;}YK_BOOL YKString::IsAlnum( size_type pos /* = npos */ ) const{if (empty())return false;if (pos == npos){for (const_iterator i = begin(); i != end(); ++i){if (!std::isalnum(*i, std::locale()))return false;}}else{YKString strTemp = at(pos);return strTemp.IsAlnum();}return true;}YK_BOOL YKString::IsBlank( size_type pos /* = npos */ ) const{if (empty())return false;if (pos == npos){for (const_iterator i = begin(); i != end(); ++i){if (!std::isblank(*i, std::locale()))return false;}}else{YKString strTemp = at(pos);return strTemp.IsBlank();}return true;}YK_INT YKString::iCompare( const YKString& rhs ) const{const_iterator iter = begin();const_iterator iterEnd = end();const_iterator iterRhs = rhs.begin();const_iterator iterRhsEnd = rhs.end();while (iter != iterEnd && iterRhs != iterRhsEnd){value_type c1(std::tolower(*iter, std::locale()));value_type c2(std::tolower(*iterRhs, std::locale()));if (c1 < c2)return -1;else if (c1 > c2)return 1;++iter; ++iterRhs;}if (iter == iterEnd)return iterRhs == iterRhsEnd ? 0 : -1;return 1;}YKString& YKString::ToLower(){for (iterator i = begin(); i != end(); ++i){*i = std::tolower(*i, std::locale());}return *this;}YKString& YKString::ToUpper(){for (iterator i = begin(); i != end(); ++i){*i = std::toupper(*i, std::locale());}return *this;}YKString& YKString::Replace( const YKString& lVal, const YKString& rVal ){size_type lastpos = 0, thispos;while ((thispos = find(lVal, lastpos)) != npos){replace(thispos, lVal.size(), rVal);lastpos = thispos + rVal.size();}return *this;}void YKString::TrimLeft(){const_iterator i = begin();for (; i != end(); ++i){if (!std::isspace(*i, std::locale()))break;}erase(begin(), i);}void YKString::TrimRight(){const_reverse_iterator ri = rbegin();for (; ri != rend(); ++ri){if (!std::isspace(*ri, std::locale()))break;}erase(rbegin().base(), ri.base());}void YKString::Trim(){TrimLeft();TrimRight();}YKString::size_type YKString::ifind_first_of(const YKString& str, size_type off /* = 0 */, size_type count /* = 0 */){YKString temp = str;temp.ToLower();count = count > 0 ? count : temp.length();return find_first_of(temp.c_str(), off, count);}YKString::size_type YKString::ifind_first_not_of(){return 0;}YKString::size_type YKString::ifind_last_of(){return 0;}YKString::size_type YKString::ifind_last_not_of(){return 0;}YKString::size_type YKString::find_nth(){return 0;}YKString::size_type YKString::ifind_nth(){return 0;}YKString YKString::find_head(const YKString& sep) const{size_type pos = find(sep.c_str());if (pos != YKString::npos){return std::move(substr(0, pos));}return L"";}YKString YKString::find_tail(const YKString& sep) const{size_type pos = find_last_of(sep.c_str());if (pos != YKString::npos){return std::move(substr(pos+sep.size()));}return L"";}YKString YKString::FormatDigit( YK_LONG val, size_type width ){YKBuffer<YK_WCHAR> temp(20);YKString str = L"%0";str += YKString::Format(width);str += L"d";swprintf(temp.Begin(), temp.Size(), str.c_str(), val);return temp.Begin();}YK_ULONG YKString::ConvertRGB(){YK_ULONG rgbVal = 0;size_type fPos = find(L'(');size_type lPos = find(L')');if (fPos != npos && lPos != npos){YKString strVal = substr(fPos+1, lPos-fPos-1);std::vector<YK_ULONG> vecVal = strVal.Parse<YK_ULONG>(L",");if (vecVal.size() == 3){// #ifdef _MSC_VER && _WINDOWS// rgbVal = RGB(vecVal[0], vecVal[1], vecVal[2]);// #endif // _MSC_VER}}return rgbVal;}std::string YKString::ToString() const{size_t size = this->size();YKBuffer<YK_CHAR> buff(size+1);size_t rtValue = 0;wcstombs_s(&rtValue, buff.Begin(), size+1, c_str(), YK_UINT_MAX);buff[size] = 0;return buff.Begin();}void YKString::Assign( const YK_CHAR* pChar ){size_t size = strlen(pChar);YKBuffer<YK_WCHAR> buff(size+1);size_t rtValue = 0;mbstowcs_s(&rtValue, buff.Begin(), size+1, pChar,  YK_UINT_MAX);buff[size] = 0x00;assign(buff.Begin());}