/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: region.h,v 1.4 2020/02/24 15:09:14 jsg Exp $ */

#ifndef ISC_REGION_H
#define ISC_REGION_H 1

/*! \file isc/region.h */

#include <isc/types.h>

struct isc_region {
        unsigned char * base;
        unsigned int    length;
};

struct isc_textregion {
        char *          base;
        unsigned int    length;
};

/*@{*/
/*!
 * The region structure is not opaque, and is usually directly manipulated.
 * Some macros are defined below for convenience.
 */

#define isc_region_consume(r,l) \
        do { \
                isc_region_t *_r = (r); \
                unsigned int _l = (l); \
                INSIST(_r->length >= _l); \
                _r->base += _l; \
                _r->length -= _l; \
        } while (0)
/*@}*/

#endif /* ISC_REGION_H */