1/* free.c 2 Free a buffer from within a memory block. 3 4 Copyright (C) 1992 Ian Lance Taylor 5 6 This file is part of the Taylor UUCP uuconf library. 7 8 This library is free software; you can redistribute it and/or 9 modify it under the terms of the GNU Library General Public License 10 as published by the Free Software Foundation; either version 2 of 11 the License, or (at your option) any later version. 12 13 This library is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 Library General Public License for more details. 17 18 You should have received a copy of the GNU Library General Public 19 License along with this library; if not, write to the Free Software 20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 21 22 The author of the program may be contacted at ian@airs.com. 23 */ 24 25#include "uucnfi.h" 26 27#if USE_RCS_ID 28const char _uuconf_free_rcsid[] = "$Id: free.c,v 1.7 2002/03/05 19:10:42 ian Rel $"; 29#endif 30 31#include "alloc.h" 32 33/* Free memory allocated by uuconf_malloc. If the memory block is 34 NULL, this just calls free; this is convenient for a number of 35 routines. Otherwise, this will only do something if this was the 36 last buffer allocated for one of the memory blocks in the list; in 37 other cases, the memory is lost until the entire memory block is 38 freed. */ 39 40#if UUCONF_ANSI_C 41void 42#endif 43uuconf_free (pblock, pbuf) 44 pointer pblock; 45 pointer pbuf; 46{ 47 struct sblock *q = (struct sblock *) pblock; 48 49 if (pbuf == NULL) 50 return; 51 52 if (q == NULL) 53 { 54 free (pbuf); 55 return; 56 } 57 58 for (; q != NULL; q = q->qnext) 59 { 60 if (q->plast == pbuf) 61 { 62 q->ifree = (char *) pbuf - q->u.ab; 63 /* We could reset q->plast here, but it doesn't matter. */ 64 return; 65 } 66 } 67} 68