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https://github.com/VDR4Arch/vdr.git
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449 lines
17 KiB
C
449 lines
17 KiB
C
//////////////////////////////////////////////////////////////
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/// ///
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/// liblx.h: definitions necessary for the liblx package ///
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/// ///
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//////////////////////////////////////////////////////////////
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// $Revision: 1.2 $
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// $Date: 2001/06/25 19:39:00 $
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// $Author: hakenes $
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//
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// (C) 1992-2001 Rolf Hakenes <hakenes@hippomi.de>, under the GNU GPL.
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//
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// liblx is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2, or (at your option)
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// any later version.
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//
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// liblx is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You may have received a copy of the GNU General Public License
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// along with liblx; see the file COPYING. If not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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#ifndef LIBLX_H
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#define LIBLX_H
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#ifndef NULL
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#define NULL 0
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#endif
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/*
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*
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* list support structures
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*
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*/
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struct NODE
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{
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struct NODE *Succ;
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struct NODE *Pred;
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char *Name;
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unsigned short HashKey;
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};
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struct LIST
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{
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struct NODE *Head;
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struct NODE *Tail;
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char *Name;
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unsigned long Size;
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};
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/*
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*
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* memory managment structures
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*
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*/
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struct MEM_ENTRY
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{
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struct MEM_ENTRY *Succ;
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struct MEM_ENTRY *Pred;
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unsigned long Size;
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};
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struct MEM_CHUNK
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{
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struct MEM_CHUNK *Succ;
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struct MEM_CHUNK *Pred;
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unsigned long Size;
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struct MEM_ENTRY *FirstFreeMemEntry;
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struct MEM_ENTRY *FirstUsedMemEntry;
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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*
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* list functions (package xList)
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*
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*/
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unsigned short xHashKey (char *);
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struct LIST *xNewList (char *);
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struct NODE *xNewNode (char *, unsigned long);
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struct NODE *xFindName (struct LIST *, char *);
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/*
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*
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* memory management
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*
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*/
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void xMemAllo (unsigned long, unsigned char **);
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void xMemFre (unsigned char *);
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void xMemFreeAll (struct MEM_CHUNK **);
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void xMemMerge (struct MEM_CHUNK **);
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struct MEM_CHUNK **xGetRemember (void);
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void xSetRemember (struct MEM_CHUNK **);
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void xPrintMemList (struct MEM_CHUNK **);
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unsigned long xGetMemSize (struct MEM_CHUNK **);
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extern unsigned long xAllocatedMemory;
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char *xSetText (char *);
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#ifdef __cplusplus
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}
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#endif
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#define MEM_CHUNK_SIZE 65536
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#define xMemAlloc(size, ptr) \
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xMemAllo (((unsigned long)((size))), ((unsigned char **)((ptr))))
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#define xMemFree(ptr) xMemFre (((unsigned char *)((ptr))))
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/*
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*
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* list support macros
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*
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*/
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/*---------------------------------------------------------------------*
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| |
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| xCreateNode (NodeStruct,Name) allocates a correctly sized and |
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| typed node struct. |
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| |
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*---------------------------------------------------------------------*/
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#define xCreateNode(NodeStruct,Name) \
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(NodeStruct) = (void *) xNewNode(Name, sizeof(*(NodeStruct)))
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/*---------------------------------------------------------------------*
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| |
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| xSize (List) scans for the ->Size field of a list struct |
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| |
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*---------------------------------------------------------------------*/
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#define xSize(List) ((List) ? ((struct LIST *)(List))->Size : 0)
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/*---------------------------------------------------------------------*
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| |
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| xName (NodeStruct) scans for the ->Node.Name of a node struct |
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| |
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*---------------------------------------------------------------------*/
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#define xName(NodeStruct) (((struct NODE *)(NodeStruct))->Name)
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/*---------------------------------------------------------------------*
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| |
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| xSucc (NodeStruct) scans for the ->Node.Succ of a node struct |
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| |
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*---------------------------------------------------------------------*/
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#define xSucc(NodeStruct) (((struct NODE *)(NodeStruct))->Succ)
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/*---------------------------------------------------------------------*
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| |
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| xPred (NodeStruct) scans for the ->Node.Pred of a node struct |
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*---------------------------------------------------------------------*/
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#define xPred(NodeStruct) (((struct NODE *)(NodeStruct))->Pred)
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/*---------------------------------------------------------------------*
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| |
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| xForeach(List,NodeStruct) builds a loop to process each list |
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| element. |
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| |
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*---------------------------------------------------------------------*/
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#define xForeach(List,NodeStruct) \
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if (List) for ((NodeStruct) = (void *) ((struct LIST *)(List))->Head; \
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(NodeStruct); (NodeStruct) = (void *) xSucc (NodeStruct))
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/*---------------------------------------------------------------------*
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| |
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| xForeachReverse(List,NodeStruct) builds a loop to process each |
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| element in reverse order. |
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| |
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*---------------------------------------------------------------------*/
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#define xForeachReverse(List,NodeStruct) \
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if (List) for ((NodeStruct) = (void *) ((struct LIST *)(List))->Tail; \
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NodeStruct; (NodeStruct) = (void *) xPred (NodeStruct))
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/*---------------------------------------------------------------------*
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| |
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| xRemove(List,NodeStruct) unchains a node struct out of a list. |
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| |
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*---------------------------------------------------------------------*/
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#define xRemove(List,NodeStruct) \
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do \
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{ \
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struct NODE *TmpNode; \
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struct LIST *TmpList; \
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\
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TmpNode = ((struct NODE *)(NodeStruct)); \
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TmpList = ((struct LIST *)(List)); \
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\
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if (TmpNode->Pred) \
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(TmpNode->Pred)->Succ = TmpNode->Succ; \
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else TmpList->Head = TmpNode->Succ; \
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if (TmpNode->Succ) \
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(TmpNode->Succ)->Pred = TmpNode->Pred; \
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else TmpList->Tail = TmpNode->Pred; \
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TmpList->Size --; \
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} while (0)
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/*************************************************************************
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* *
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* function : xAddHead *
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* *
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* arguments : List - pointer to a LIST structure *
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* *
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* Node - pointer to a NODE structure *
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* *
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*-----------------------------------------------------------------------*
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* *
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* xAddHead() inserts 'Node' at the head of 'List'. *
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* *
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*************************************************************************/
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#define xAddHead(List, NodeStruct) \
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do { \
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struct NODE *TmpNode; \
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struct LIST *TmpList; \
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\
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TmpNode = ((struct NODE *)(NodeStruct)); \
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TmpList = ((struct LIST *)(List)); \
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\
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if (TmpList->Head) { \
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TmpNode->Pred = NULL; \
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TmpNode->Succ = TmpList->Head; \
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(TmpList->Head)->Pred = TmpNode; \
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TmpList->Head = TmpNode; } \
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else { \
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TmpList->Head = TmpNode; \
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TmpList->Tail = TmpNode; \
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TmpNode->Pred = NULL; \
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TmpNode->Succ = NULL; } \
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TmpList->Size++; \
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} while (0)
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/*************************************************************************
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* *
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* function : xAddTail *
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* *
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* arguments : List - pointer to a LIST structure *
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* *
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* Node - pointer to a NODE structure *
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* *
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*-----------------------------------------------------------------------*
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* *
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* xAddTail() inserts 'Node' at the tail of 'List'. *
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* *
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*************************************************************************/
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#define xAddTail(List, NodeStruct) \
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do { \
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struct NODE *TmpNode; \
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struct LIST *TmpList; \
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\
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TmpNode = ((struct NODE *)(NodeStruct)); \
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TmpList = ((struct LIST *)(List)); \
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\
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if (TmpList->Head) { \
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TmpNode->Succ = NULL; \
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TmpNode->Pred = TmpList->Tail; \
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(TmpList->Tail)->Succ = TmpNode; \
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TmpList->Tail = TmpNode; } \
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else { \
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TmpList->Head = TmpNode; \
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TmpList->Tail = TmpNode; \
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TmpNode->Pred = NULL; \
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TmpNode->Succ = NULL; } \
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TmpList->Size++; \
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} while (0)
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/*************************************************************************
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* *
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* function : xRemHead *
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* *
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* arguments : List - pointer to a LIST structure *
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* *
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*-----------------------------------------------------------------------*
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* *
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* xRemHead() removes a Node from head of 'List'. *
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* *
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*************************************************************************/
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#define xRemHead(List) \
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do { \
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struct LIST *TmpList; \
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\
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TmpList = ((struct LIST *)(List)); \
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\
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if (TmpList->Head) \
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{ \
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TmpList->Head = (TmpList->Head)->Succ; \
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if (TmpList->Head) (TmpList->Head)->Pred = NULL; \
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else TmpList->Tail = NULL; \
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TmpList->Size--; \
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} \
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} while (0)
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/*************************************************************************
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* *
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* function : xRemTail *
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* *
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* arguments : List - pointer to a LIST structure *
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* *
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*-----------------------------------------------------------------------*
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* *
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* xRemTail() removes a Node from the tail of 'List'. *
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* *
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*************************************************************************/
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#define xRemTail(List) \
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do { \
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struct LIST *TmpList; \
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\
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TmpList = ((struct LIST *)(List)); \
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\
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if (TmpList->Tail) \
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{ \
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TmpList->Tail = (TmpList->Tail)->Pred; \
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if (TmpList->Tail) (TmpList->Tail)->Succ = NULL; \
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else TmpList->Head = NULL; \
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TmpList->Size--; \
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} \
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} while (0)
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/*************************************************************************
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* *
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* function : xConCat *
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* *
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* arguments : DestinationList - pointer to the destination *
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* LIST structure *
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* *
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* SourceList - pointer to the source LIST structure *
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* *
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*-----------------------------------------------------------------------*
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* *
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* xConCat() concats 'SourceList' with 'DestinationList' and clears *
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* 'SourceList'. *
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* *
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*************************************************************************/
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#define xConCat(DestinationList, SourceList) \
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do { \
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struct LIST *SrcList; \
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struct LIST *DstList; \
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\
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SrcList = ((struct LIST *)(SourceList)); \
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DstList = ((struct LIST *)(DestinationList)); \
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\
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if (DstList && SrcList) \
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{ \
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if (DstList->Head) { \
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if (SrcList->Head) { \
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(DstList->Tail)->Succ = SrcList->Head; \
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(SrcList->Head)->Pred = DstList->Tail; \
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DstList->Tail = SrcList->Tail; \
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DstList->Size += SrcList->Size; \
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SrcList->Size = 0; \
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SrcList->Head = NULL; \
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SrcList->Tail = NULL; } } \
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else { \
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DstList->Head = SrcList->Head; \
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DstList->Tail = SrcList->Tail; \
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DstList->Size += SrcList->Size; \
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SrcList->Size = 0; \
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SrcList->Head = NULL; \
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SrcList->Tail = NULL; } \
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} \
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else if (SrcList) ((struct LIST *)(DestinationList)) = SrcList; \
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} while (0)
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#define xJoinList(SourceList, DestinationList, NodeStruct) \
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do { \
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struct NODE *KeyNode; \
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struct NODE *TmpNode; \
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struct LIST *SrcList; \
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struct LIST *DstList; \
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\
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KeyNode = ((struct NODE *)(NodeStruct)); \
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SrcList = ((struct LIST *)(SourceList)); \
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DstList = ((struct LIST *)(DestinationList)); \
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\
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if (SrcList->Head) \
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{ \
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TmpNode = KeyNode->Succ; \
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KeyNode->Succ = SrcList->Head; \
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SrcList->Tail->Succ = TmpNode; \
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SrcList->Head->Pred = KeyNode; \
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if (!TmpNode) DstList->Tail = SrcList->Tail; \
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else TmpNode->Pred = SrcList->Tail; \
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DstList->Size += SrcList->Size; \
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SrcList->Size = 0; \
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SrcList->Head = NULL; \
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SrcList->Tail = NULL; \
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} \
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} while (0)
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#define xJoin(SourceNode, DestinationList, NodeStruct) \
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do { \
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struct NODE *KeyNode; \
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struct NODE *TmpNode; \
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struct NODE *SrcNode; \
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struct LIST *DstList; \
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\
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KeyNode = ((struct NODE *)(NodeStruct)); \
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SrcNode = ((struct NODE *)(SourceNode)); \
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DstList = ((struct LIST *)(DestinationList)); \
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\
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if (SrcNode) \
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{ \
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TmpNode = KeyNode->Succ; \
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KeyNode->Succ = SrcNode; \
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SrcNode->Succ = TmpNode; \
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SrcNode->Pred = KeyNode; \
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if (!TmpNode) DstList->Tail = SrcNode; \
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else TmpNode->Pred = SrcNode; \
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DstList->Size += 1; \
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} \
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} while (0)
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#define xClearList(SrcList) \
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do { \
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(SrcList)->Size = 0; \
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(SrcList)->Head = NULL; \
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(SrcList)->Tail = NULL; \
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} while (0)
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#define xSetName(nodestruct, name) \
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do { \
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struct NODE *TmpNode; \
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\
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TmpNode = (struct NODE *) (nodestruct); \
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\
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TmpNode->Name = xSetText (name); \
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TmpNode->HashKey = xHashKey (name); \
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} while (0)
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#endif
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