自己写string 字符串处理类。。。。。。。。。。。。。。
// YoungString.cpp : Defines the entry point for the console application.//#include <tchar.h>#include "YoungBuffer.h"#include "YoungString.h"int YoungStringA::Format(char* pstrFormat, ...){YoungStringA sFormat = pstrFormat;// Do ordinary printf replacements// NOTE: Documented max-length of wvsprintf() is 1024char szBuffer[1025] = { 0 };va_list argList;va_start(argList, pstrFormat);int iRet = vsprintf(szBuffer, sFormat, argList);va_end(argList);assign(szBuffer);return iRet;}void YoungStringA::clear(){m_pData = NULL;memset(m_Buffer, 0, MAX_LOCAL_STRING_LEN+1);}void YoungStringA::append(const char *p_data){int iNewLength = length() + (int) strlen(p_data);if( iNewLength >= MAX_LOCAL_STRING_LEN ) {if( m_pData == m_Buffer ){m_pData = static_cast<char*>(malloc((iNewLength + 1) * sizeof(char)));strcpy(m_pData, m_Buffer);strcat(m_pData, p_data);}else {m_pData = static_cast<char*>(realloc(m_pData, (iNewLength + 1) * sizeof(char)));strcat(m_pData, p_data);}}else {if( m_pData != m_Buffer ) {free(m_pData);m_pData = m_Buffer;}strcat(m_Buffer, p_data);}}void YoungStringA::upper(){strupr(m_pData);}void YoungStringA::lower(){strlwr(m_pData);}int YoungStringA::length(){if (m_bWideChar){return wcslen((const wchar_t*)m_pData);}else {return strlen((const char*)m_pData);}//return strlen()}void YoungStringA::assign(const char* p_data, int iLen){if( p_data == NULL ) p_data = "";iLen = (iLen < 0 ? (int) strlen(p_data) : iLen);if( iLen < MAX_LOCAL_STRING_LEN ) {if( m_pData != m_Buffer ) {free(m_pData);m_pData = m_Buffer;}}else if( iLen > length() || m_pData == m_Buffer ) // {if( m_pData == m_Buffer ) m_pData = NULL;m_pData = (char*)realloc(m_pData, (iLen + 1) * sizeof(char));}memset(m_pData,0, iLen);strncpy(m_pData, p_data, iLen);}YoungStringA::YoungStringA(const char * sz){clear();assign(sz);}YoungStringA::YoungStringA(const char * sz,int iLen){clear();assign(sz,iLen);}YoungStringA::YoungStringA(YoungStringA& src)//拷贝构造函数{assign(src.m_pData);}YoungStringA& YoungStringA::operator=(const char* p_data){if (p_data == NULL){clear();}else{assign(p_data);}return *this;}YoungStringA& YoungStringA::operator=(string str){assign(str.c_str());return *this;}YoungStringA::operator char*(){return m_pData;}YoungStringA::operator const char*(){return m_pData;}//待扩充！！！！！
https://code.google.com/p/power-younglib