strip whitespace c 2b 2b

1#include <algorithm> 
2#include <cctype>
3#include <locale>
4
5// trim from start (in place)
6static inline void ltrim(std::string &s) {
7    s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](unsigned char ch) {
8        return !std::isspace(ch);
9    }));
10}
11
12// trim from end (in place)
13static inline void rtrim(std::string &s) {
14    s.erase(std::find_if(s.rbegin(), s.rend(), [](unsigned char ch) {
15        return !std::isspace(ch);
16    }).base(), s.end());
17}
18
19// trim from both ends (in place)
20static inline void trim(std::string &s) {
21    ltrim(s);
22    rtrim(s);
23}
24
25// trim from start (copying)
26static inline std::string ltrim_copy(std::string s) {
27    ltrim(s);
28    return s;
29}
30
31// trim from end (copying)
32static inline std::string rtrim_copy(std::string s) {
33    rtrim(s);
34    return s;
35}
36
37// trim from both ends (copying)
38static inline std::string trim_copy(std::string s) {
39    trim(s);
40    return s;
41}
42