include/dbuf.h

   1 /*
   2  * IRC - Internet Relay Chat, include/dbuf.h
   3  * Copyright (C) 1990 Markku Savela
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /** @file
  20  * @brief Interfaces and declarations for dealing with data buffers.
  21  * @version $Id: dbuf.h,v 1.7 2004/10/05 00:51:56 entrope Exp $
  22  */
  23 #ifndef INCLUDED_dbuf_h
  24 #define INCLUDED_dbuf_h
  25 #ifndef INCLUDED_sys_types_h
  26 #include <sys/types.h>          /* size_t */
  27 #define INCLUDED_sys_types_h
  28 #endif
  29
  30 /*
  31  * These two globals should be considered read only
  32  */
  33 extern int DBufAllocCount;
  34 extern int DBufUsedCount;
  35
  36 struct DBufBuffer;
  37
  38 /** Queue of data chunks. */
  39 struct DBuf {
  40   unsigned int length;          /**< Current number of bytes stored */
  41   struct DBufBuffer *head;      /**< First data buffer, if length > 0 */
  42   struct DBufBuffer *tail;      /**< Last data buffer, if length > 0 */
  43 };
  44
  45 /** Return number of bytes in a DBuf. */
  46 #define DBufLength(dyn) ((dyn)->length)
  47
  48 /** Release the entire content of a DBuf. */
  49 #define DBufClear(dyn) dbuf_delete((dyn), DBufLength(dyn))
  50
  51 /*
  52  * Prototypes
  53  */
  54 extern void dbuf_delete(struct DBuf *dyn, unsigned int length);
  55 extern int dbuf_put(struct DBuf *dyn, const char *buf, unsigned int length);
  56 extern const char *dbuf_map(const struct DBuf *dyn, unsigned int *length);
  57 extern unsigned int dbuf_get(struct DBuf *dyn, char *buf, unsigned int length);
  58 extern unsigned int dbuf_getmsg(struct DBuf *dyn, char *buf, unsigned int length);
  59 extern void dbuf_count_memory(size_t *allocated, size_t *used);
  60
  61
  62 #endif /* INCLUDED_dbuf_h */