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