svalues

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// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.
 
#ifndef tools_svalues
#define tools_svalues
 
// See also snums.
 
#include "sto"
#include <vector>
 
namespace tools {
 
template <class T>
inline bool values(const std::string& a_string,const std::string& a_sep,bool a_take_empty,std::vector<T>& a_values){
  // same logic as words() function.
 
  a_values.clear();
  if(a_string.empty()) return true;
  std::string::size_type lim = (a_take_empty?0:1);
  if(a_sep.empty()) {
    T value;
    if(!to<T>(a_string,value)) {
      a_values.clear();
      return false;
    }
    a_values.push_back(value);
  } else {
    std::string::size_type l = a_string.length();
    std::string::size_type llimiter = a_sep.length();
    std::string::size_type pos = 0;
    while(true) {
      std::string::size_type index = a_string.find(a_sep,pos);
      if(index==std::string::npos){ // Last word.
        if((l-pos)>=lim) {
          T value;
          if(!to<T>(a_string.substr(pos,l-pos),value)) {
            a_values.clear();
            return false;
          }
          a_values.push_back(value);
        }
        break;
      } else {
        //     abcxxxef
        //     0  3  67
        if((index-pos)>=lim) {
          T value;
          if(!to<T>(a_string.substr(pos,index-pos),value)) {
            a_values.clear();
            return false;
          }
          a_values.push_back(value);
        }
        pos = index + llimiter;
      }
    }
  }
  return true;
}
 
}
 
#endif