/*

[0] Fix | Delete

* Copyright (C) Internet Systems Consortium, Inc. ("ISC")

[1] Fix | Delete

*

[2] Fix | Delete

* This Source Code Form is subject to the terms of the Mozilla Public

[3] Fix | Delete

* License, v. 2.0. If a copy of the MPL was not distributed with this

[4] Fix | Delete

* file, you can obtain one at https://mozilla.org/MPL/2.0/.

[5] Fix | Delete

*

[6] Fix | Delete

* See the COPYRIGHT file distributed with this work for additional

[7] Fix | Delete

* information regarding copyright ownership.

[8] Fix | Delete

*/

[9] Fix | Delete

[10] Fix | Delete

[11] Fix | Delete

#ifndef ISC_REGION_H

[12] Fix | Delete

#define ISC_REGION_H 1

[13] Fix | Delete

[14] Fix | Delete

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

[15] Fix | Delete

[16] Fix | Delete

#include <isc/types.h>

[17] Fix | Delete

#include <isc/lang.h>

[18] Fix | Delete

[19] Fix | Delete

struct isc_region {

[20] Fix | Delete

unsigned char * base;

[21] Fix | Delete

unsigned int length;

[22] Fix | Delete

};

[23] Fix | Delete

[24] Fix | Delete

struct isc_textregion {

[25] Fix | Delete

char * base;

[26] Fix | Delete

unsigned int length;

[27] Fix | Delete

};

[28] Fix | Delete

[29] Fix | Delete

/* XXXDCL questionable ... bears discussion. we have been putting off

[30] Fix | Delete

* discussing the region api.

[31] Fix | Delete

*/

[32] Fix | Delete

struct isc_constregion {

[33] Fix | Delete

const void * base;

[34] Fix | Delete

unsigned int length;

[35] Fix | Delete

};

[36] Fix | Delete

[37] Fix | Delete

struct isc_consttextregion {

[38] Fix | Delete

const char * base;

[39] Fix | Delete

unsigned int length;

[40] Fix | Delete

};

[41] Fix | Delete

[42] Fix | Delete

/*@{*/

[43] Fix | Delete

/*!

[44] Fix | Delete

* The region structure is not opaque, and is usually directly manipulated.

[45] Fix | Delete

* Some macros are defined below for convenience.

[46] Fix | Delete

*/

[47] Fix | Delete

[48] Fix | Delete

#define isc_region_consume(r,l) \

[49] Fix | Delete

do { \

[50] Fix | Delete

isc_region_t *_r = (r); \

[51] Fix | Delete

unsigned int _l = (l); \

[52] Fix | Delete

INSIST(_r->length >= _l); \

[53] Fix | Delete

_r->base += _l; \

[54] Fix | Delete

_r->length -= _l; \

[55] Fix | Delete

} while (0)

[56] Fix | Delete

[57] Fix | Delete

#define isc_textregion_consume(r,l) \

[58] Fix | Delete

do { \

[59] Fix | Delete

isc_textregion_t *_r = (r); \

[60] Fix | Delete

unsigned int _l = (l); \

[61] Fix | Delete

INSIST(_r->length >= _l); \

[62] Fix | Delete

_r->base += _l; \

[63] Fix | Delete

_r->length -= _l; \

[64] Fix | Delete

} while (0)

[65] Fix | Delete

[66] Fix | Delete

#define isc_constregion_consume(r,l) \

[67] Fix | Delete

do { \

[68] Fix | Delete

isc_constregion_t *_r = (r); \

[69] Fix | Delete

unsigned int _l = (l); \

[70] Fix | Delete

INSIST(_r->length >= _l); \

[71] Fix | Delete

_r->base += _l; \

[72] Fix | Delete

_r->length -= _l; \

[73] Fix | Delete

} while (0)

[74] Fix | Delete

/*@}*/

[75] Fix | Delete

[76] Fix | Delete

ISC_LANG_BEGINDECLS

[77] Fix | Delete

[78] Fix | Delete

int

[79] Fix | Delete

isc_region_compare(isc_region_t *r1, isc_region_t *r2);

[80] Fix | Delete

/*%<

[81] Fix | Delete

* Compares the contents of two regions

[82] Fix | Delete

*

[83] Fix | Delete

* Requires:

[84] Fix | Delete

*\li 'r1' is a valid region

[85] Fix | Delete

*\li 'r2' is a valid region

[86] Fix | Delete

*

[87] Fix | Delete

* Returns:

[88] Fix | Delete

*\li < 0 if r1 is lexicographically less than r2

[89] Fix | Delete

*\li = 0 if r1 is lexicographically identical to r2

[90] Fix | Delete

*\li > 0 if r1 is lexicographically greater than r2

[91] Fix | Delete

*/

[92] Fix | Delete

[93] Fix | Delete

ISC_LANG_ENDDECLS

[94] Fix | Delete

[95] Fix | Delete

#endif /* ISC_REGION_H */

[96] Fix | Delete

[97] Fix | Delete