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/* -*- c-file-style: "bsd" -*-
* rproxy -- dynamic caching and delta update in HTTP
* $Id: map_p.h,v 1.3 2000/08/06 12:50:36 mbp Exp $
*
* Copyright (C) 1999, 2000 by Martin Pool <mbp@humbug.org.au>
* Copyright (C) 1999 by Andrew Tridgell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Private header for file maps. */
/*
* HS_MAP structure:
*
* TAG is a dogtag, and always equal to HS_MAP_TAG if the structure is valid.
* FD is of course the file descriptor we're using for input.
*
* P points to the start of the allocated data buffer. P_SIZE is the amount
* of allocated buffer at P, not all of which necessarily contains valid file
* data.
*
* P_FD_OFFSET is the current absolute position of the file cursor. We use
* this to avoid doing seeks if we're already in the right position.
* P_OFFSET is the absolute position in the file covered by P[0]. P_LEN is
* the number of bytes after that point that are valid in P.
*/
#define HS_MAP_TAG 189901
struct hs_map
{
int godtag;
byte_t *p;
int fd;
size_t p_size, p_len;
off_t p_offset, p_fd_offset;
};
/* mapptr private implementation functions */
void *
_hs_map_from_cache(hs_map_t * map, off_t offset, size_t *len);
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