malloc в C

#define NEKAKVO_MAX_M 100000 // primerno -> mozhe wmesto tova MAX_INT da ostawish

#define NEKAKVO_MAX_N 100000



struct root *root_malloc( int m, int n )

{

  struct root *r;

  struct first *f;

  struct second *s;



  if( (unsigned)m < NEKAKVO_MAX_M && (unsigned)n < NEKAKVO_MAX_N )

  {

     r = malloc( sizeof(*r) );

     f = malloc( sizeof(*f) * m );

     s = malloc( sizeof(*s) * n );

     if( f && r && s )

     {

          r->f = f;

          r->s = s;

          return r; // WAHOO success

     }

     // failed - free what's not NULL, NULL's will be skipped by free()

     free(r);

     free(f);

     free(s);

   }



  return NULL;

}