memswap.c

linux内核

/*
 * memswap()
 *
 * Swaps the contents of two nonoverlapping memory areas.
 * This really could be done faster...
 */

#include <string.h>

void memswap(void *m1, void *m2, size_t n)
{
  char *p = m1;
  char *q = m2;
  char tmp;

  while ( n-- ) {
    tmp = *p;
    *p = *q;
    *q = tmp;
    
    p++; q++;
  }
}