xdelta3-list.h


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/* xdelta 3 - delta compression tools and library
 * Copyright (C) 2002, 2006, 2007.  Joshua P. MacDonald
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __XDELTA3_LIST__
#define __XDELTA3_LIST__

#define XD3_MAKELIST(LTYPE,ETYPE,LNAME)                                 \
                                                                        \
static inline ETYPE*                                                    \
LTYPE ## _entry (LTYPE* l)                                              \
{                                                                       \
  return (ETYPE*) ((char*) l - (ptrdiff_t) &((ETYPE*) 0)->LNAME);       \
}                                                                       \
                                                                        \
static inline void                                                      \
LTYPE ## _init (LTYPE *l)                                               \
{                                                                       \
  l->next = l;                                                          \
  l->prev = l;                                                          \
}                                                                       \
                                                                        \
static inline void                                                      \
LTYPE ## _add (LTYPE *prev, LTYPE *next, LTYPE *ins)                    \
{                                                                       \
  next->prev = ins;                                                     \
  prev->next = ins;                                                     \
  ins->next  = next;                                                    \
  ins->prev  = prev;                                                    \
}                                                                       \
                                                                        \
static inline void                                                      \
LTYPE ## _push_back (LTYPE *l, ETYPE *i)                                \
{                                                                       \
  LTYPE ## _add (l->prev, l, & i->LNAME);                               \
}                                                                       \
                                                                        \
static inline void                                                      \
LTYPE ## _del (LTYPE *next,                                             \
	       LTYPE *prev)                                             \
{                                                                       \
  next->prev = prev;                                                    \
  prev->next = next;                                                    \
}                                                                       \
                                                                        \
static inline ETYPE*                                                    \
LTYPE ## _remove (ETYPE *f)                                             \
{                                                                       \
  LTYPE *i = f->LNAME.next;                                             \
  LTYPE ## _del (f->LNAME.next, f->LNAME.prev);                         \
  return LTYPE ## _entry (i);                                           \
}                                                                       \
                                                                        \
static inline ETYPE*                                                    \
LTYPE ## _pop_back (LTYPE *l)                                           \
{                                                                       \
  LTYPE *i = l->prev;                                                   \
  LTYPE ## _del (i->next, i->prev);                                     \
  return LTYPE ## _entry (i);                                           \
}                                                                       \
                                                                        \
static inline ETYPE*                                                    \
LTYPE ## _pop_front (LTYPE *l)                                          \
{                                                                       \
  LTYPE *i = l->next;                                                   \
  LTYPE ## _del (i->next, i->prev);                                     \
  return LTYPE ## _entry (i);                                           \
}                                                                       \
                                                                        \
static inline int                                                       \
LTYPE ## _empty (LTYPE *l)                                              \
{                                                                       \
  return l == l->next;                                                  \
}                                                                       \
                                                                        \
static inline ETYPE*                                                    \
LTYPE ## _front (LTYPE *f)                                              \
{                                                                       \
  return LTYPE ## _entry (f->next);                                     \
}                                                                       \
                                                                        \
static inline ETYPE*                                                    \
LTYPE ## _back (LTYPE *f)                                               \
{                                                                       \
  return LTYPE ## _entry (f->prev);                                     \
}                                                                       \
                                                                        \
static inline int                                                       \
LTYPE ## _end (LTYPE *f, ETYPE *i)                                      \
{                                                                       \
  return f == & i->LNAME;                                               \
}                                                                       \
                                                                        \
static inline ETYPE*                                                    \
LTYPE ## _next (ETYPE *f)                                               \
{                                                                       \
  return LTYPE ## _entry (f->LNAME.next);                               \
}                                                                       \
                                                                        \
static inline usize_t                                                   \
LTYPE ## _length (LTYPE *l)                                             \
{                                                                       \
  LTYPE *p;                                                             \
  int c = 0;                                                            \
                                                                        \
  for (p = l->next; p != l; p = p->next)                                \
    {                                                                   \
      c += 1;                                                           \
    }                                                                   \
                                                                        \
  return c;                                                             \
}                                                                       \
                                                                        \
typedef int unused_ ## LTYPE

#endif