C/C++ std::string 切词

用了三种方法...
#if 0
void StringTokenize(const std::string& strSrc, const std::string& strDelimit, std::vector<std::string>& vecSub)
{
if (strSrc.empty() || strDelimit.empty())
{
throw "tokenize: empty string\n";
}
vecSub.clear();

std::size_t nCurPos = 0;
std::size_t nNextPos = 0;
while ((nNextPos = strSrc.find_first_of(strDelimit, nCurPos)) != std::string::npos)
{
if (nNextPos - nCurPos > 0)
{
vecSub.push_back(strSrc.substr(nCurPos, nNextPos - nCurPos));
}
nCurPos = nNextPos + 1;
}
// Add the last one
std::string strLast = strSrc.substr(nCurPos);
if (!strLast.empty())
vecSub.push_back(strSrc.substr(nCurPos));
}
void StringToken(char *strToken, const char *strDelimit, std::vector<std::string>& vecSub)
{
assert(strToken && strDelimit && "Token, Delimit can not be NULL");
vecSub.clear();
char *pToken = strToken;
char *pNextToken = NULL;
pToken = strtok_s(pToken, strDelimit, &pNextToken);
while (pToken != NULL)
{
vecSub.push_back(pToken);
pToken = strtok_s(NULL, strDelimit, &pNextToken);
}
}
#endif
void StringTokenize(const std::string& strSrc, const std::string& strDelimit, std::vector<std::string>& vecSub)
{
if (strSrc.empty() || strDelimit.empty())
{
throw "tokenize: empty string\n";
}
vecSub.clear();
std::size_t nCurPos = 0;
std::size_t nNextPos = 0;
while ((nCurPos = strSrc.find_first_not_of(strDelimit, nNextPos)) != std::string::npos)
{
nNex