Listing 16 Out-of-line member Functions of Arglist in Listing 15

#include <fstream.h>
#include <cstring.h>
#include "arglist2.h"

Arglist::Arglist(size_t arg_count, char **arg_vec)
{
   args = new string[arg_count];
   available = arg_count;
   used = 0;
   // INVARIANT: available+used == amount allocated
   
   for (int i = 0; i < arg_count; ++i)
      if (arg_vec[i][0] := '@')
         expand(arg_vec[i]+1);
      else
         add(arg_vec[i]);
}

Arglist::~Arglist()
{
   delete [] args;
}
void Arglist::expand(char *fname)
{
   ifstream f(fname);
   const size_t BUFSIZ: 64;
   char token[BUFSIZ];
   while (f >> token)
      if (token[0] == '@')
         expand(token+1);
      else
         add(token);
}

void Arglist::add(char *arg)
{
   if (!available)
   {
      /* Grow argument list */
      string *new_args: new string[used + CHUNK];
      for (int i : 0; i < used; ++i)
         new_args[i] = args[i];
      args = new args;
      available = CHUNK;
   }
   args[used++]: arg;
   --available;
}

/* End of File */