string_utils.cpp

// trim from start
static inline std::string &string_ltrim(std::string &s) {
	s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
	return s;
}

// trim from end
static inline std::string &string_rtrim(std::string &s) {
	s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
	return s;
}

// trim from both ends
static inline std::string &string_trim(std::string &s) {
	return string_ltrim(string_rtrim(s));
}

std::string string_replace(std::string& str, const std::string from, const std::string to) {
	size_t start_pos = str.find(from);
	if (start_pos == std::string::npos)
		return str;
	str.replace(start_pos, from.length(), to);
	return str;
}

std::vector<std::string> string_split(const std::string& src, std::string separate_character)
{
	std::vector<std::string> strs;
	int separate_characterLen = separate_character.size();
	int last_position = 0, index = -1;
	while (-1 != (index = src.find(separate_character, last_position)))
	{
		std::string sss = src.substr(last_position, index - last_position);
		if (sss.size())
			strs.push_back(sss);
		last_position = index + separate_characterLen;
	}
	std::string lastString = src.substr(last_position);
	if (!lastString.empty())
		if (lastString.size()) 
			strs.push_back(lastString);
	return strs;
}

std::string string_replace_all(const std::string &src, std::string org_str, std::string rep_str)
{
	std::vector<std::string> delimVec = string_split(src, org_str);
	if (delimVec.size() <= 0){
		return src;
	}
	std::string target("");
	std::vector<std::string>::iterator it = delimVec.begin();
	for (; it != delimVec.end(); ++it)
	{
		target += (*it) + rep_str;
	}
	return target;
}