// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef tools_buf2lines
#define tools_buf2lines

#include <vector>
#include <string>
#include <string.h> //memcpy

namespace tools {

inline bool strings2buf(const std::vector<std::string>& a_strings,size_t& a_size,char*& a_buffer) {
  // For {"aa","bbb"}, it produces "aa0bbb00".
  // For {""}, it produces "00".
  // For {}, it produces "0".
  size_t number = a_strings.size();
  a_size = 0;
  for(size_t index=0;index<number;index++) a_size += a_strings[index].size()+1;
  a_size++;
  a_buffer = new char[a_size];
  if(!a_buffer) {a_size = 0;return false;}
  char* pos = a_buffer;
  size_t array_size;
  for(size_t index=0;index<number;index++) {
    const std::string& _s = a_strings[index];
    array_size = _s.size()+1;
    ::memcpy(pos,_s.c_str(),array_size);
    pos += array_size;
  }
  *pos = '\0';
  return true;
}

inline bool buf2strings(size_t a_size,char* a_buffer,std::vector<std::string>& a_strings) {
  if(a_size<=1) return false;
  // We assume here a_size>=1
  // Exa : if ab0cde00, then a_strings should contain two strings ab and cde.
  a_strings.clear();
  char* begin = a_buffer;
  char* pos = a_buffer;
  size_t number = a_size-1;
  for(size_t index=0;index<number;index++) {
    if((*pos)=='\0') {
      size_t l = pos - begin;
      std::string _s(l,0);
      char* data = (char*)_s.c_str();
      ::memcpy(data,begin,l);
      a_strings.push_back(_s);
      begin = pos+1;
    }
    pos++;
  }
  return true;
}

}

#endif