src/trim.h

   1 // Found at:
   2 // http://stackoverflow.com/questions/216823/whats-the-best-way-to-trim-stdstring
   3
   4 // Note that these functions trim the same arguments passed in, and do not
   5 // make copies.
   6
   7 #ifndef __BARRY_TRIM_H__
   8 #define __BARRY_TRIM_H__
   9
  10 #include <stdlib.h>
  11 #include <algorithm>
  12 #include <functional>
  13 #include <locale>
  14 #include <cctype>
  15
  16 namespace Barry { namespace Inplace {
  17
  18 // Windows CE defines std::isspace(int) as a macro to a function with
  19 // two arguments with one prefilled, so a wrapper function is needed.
  20 static inline int isSpaceChar(int c) {
  21         return std::isspace(c);
  22 }
  23
  24 // trim from start
  25 static inline std::string &ltrim(std::string &s) {
  26         std::string::iterator end(std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(isSpaceChar))));
  27         s.erase(s.begin(), end);
  28         return s;
  29 }
  30
  31 // trim from end
  32 static inline std::string &rtrim(std::string &s) {
  33         std::string::reverse_iterator start(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(isSpaceChar))));
  34         s.erase(start.base(), s.end());
  35         return s;
  36 }
  37
  38 // trim from both ends
  39 static inline std::string &trim(std::string &s) {
  40         return ltrim(rtrim(s));
  41 }
  42
  43 }} // namespace Barry::Inplace
  44
  45 #endif
  46