trim_spaces.h

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// trim_spaces.h

#ifndef TRIM_SPACES_H
#define TRIM_SPACES_H

#include <locale>
#include <string>
#include <string.h>

std::string trim_spaces(const char* psz, std::locale loc=std::locale::classic())
{
  std::string out;
  size_t l = strlen(psz);
  if (l)
  {
    const char* start = psz;
    while(*start && std::isspace(*start, loc))
      ++start;
    const char* end = psz + l-1;
    while(end >= start && std::isspace(*end, loc))
      --end;
    
    if (start <= end)
      out.append(start, end - start +1);
  }
  return out;
}

#endif TRIM_SPACES_H

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