NetBSD/lib/libc/citrus/citrus_region.h

109 lines
3.0 KiB
C

/* $NetBSD: citrus_region.h,v 1.7 2008/02/09 14:56:20 junyoung Exp $ */
/*-
* Copyright (c)2003 Citrus Project,
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef _CITRUS_REGION_H_
#define _CITRUS_REGION_H_
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
struct _citrus_region {
/* private: */
void *r_head;
size_t r_size;
};
static __inline void
_citrus_region_init(struct _citrus_region *r, void *h, size_t sz)
{
_DIAGASSERT(r);
r->r_head = h;
r->r_size = sz;
}
static __inline void *
_citrus_region_head(const struct _citrus_region *r)
{
return r->r_head;
}
static __inline size_t
_citrus_region_size(const struct _citrus_region *r)
{
return r->r_size;
}
static __inline int
_citrus_region_check(const struct _citrus_region *r, size_t ofs, size_t sz)
{
return r->r_size >= ofs + sz ? 0 : -1;
}
static __inline void *
_citrus_region_offset(const struct _citrus_region *r, size_t pos)
{
return (void *)((uint8_t *)r->r_head + pos);
}
static __inline uint8_t
_citrus_region_peek8(const struct _citrus_region *r, size_t pos)
{
return *(uint8_t *)_citrus_region_offset(r, pos);
}
static __inline uint16_t
_citrus_region_peek16(const struct _citrus_region *r, size_t pos)
{
uint16_t val;
memcpy(&val, _citrus_region_offset(r, pos), (size_t)2);
return val;
}
static __inline uint32_t
_citrus_region_peek32(const struct _citrus_region *r, size_t pos)
{
uint32_t val;
memcpy(&val, _citrus_region_offset(r, pos), (size_t)4);
return val;
}
static __inline int
_citrus_region_get_subregion(struct _citrus_region *subr,
const struct _citrus_region *r,
size_t ofs, size_t sz)
{
if (_citrus_region_check(r, ofs, sz))
return -1;
_citrus_region_init(subr, _citrus_region_offset(r, ofs), sz);
return 0;
}
#endif