LPTSTR StrReplaceStr(LPTSTR src,LPTSTR strFind,LPTSTR strReplace)
{
if(strlen(src)==0) return src;
if(strlen(strFind)==0) return src;
SafeBuffer sWrkStr(10240); // 一个类，自动分配和释放内存
LPTSTR pNew = src;
LPTSTR pOld = src;
int nSize = 0;
int nAddSize = 0;
int nOldSize = strlen(strFind);
int nRepSize = strlen(strReplace);
while((pNew = strstr(pOld,strFind))!=NULL)
{
nAddSize = pNew - pOld;
if(nSize + nAddSize + nRepSize > sWrkStr.GetLength())
{
// 替换后空间超出原空间，则重新分配内存
sWrkStr.GetBufferSetLength((nSize + nAddSize + nRepSize)<<1); // x2
}
strncpy(sWrkStr + nSize , pOld, nAddSize);
strncpy(sWrkStr + nSize + nAddSize, strReplace, nRepSize);
nSize = nSize + nAddSize + nRepSize;
pOld += nOldSize + nAddSize;
}
if(pNew==NULL) // 曾经替换过，处理剩余的数据
{
* (sWrkStr + nSize) = 0;
strcat(sWrkStr,pOld);
strcpy(src,sWrkStr);
}
return src;
}