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/*
* $Id$
*
* DEBUG: section 90 HTTP Cache Control Header
* AUTHOR: Alex Rousskov
* Robert Collins (Surrogate-Control is derived from
* Cache-Control).
*
* SQUID Web Proxy Cache http://www.squid-cache.org/
* ----------------------------------------------------------
*
* Squid is the result of efforts by numerous individuals from
* the Internet community; see the CONTRIBUTORS file for full
* details. Many organizations have provided support for Squid's
* development; see the SPONSORS file for full details. Squid is
* Copyrighted (C) 2001 by the Regents of the University of
* California; see the COPYRIGHT file for full details. Squid
* incorporates software developed and/or copyrighted by other
* sources; see the CREDITS file for full details.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
*/
#include "squid.h"
#include "HttpHdrSc.h"
/* local prototypes */
/* module initialization */
/* implementation */
HttpHdrScTarget *
httpHdrScTargetCreate(char const *target)
{
HttpHdrScTarget *sc = new HttpHdrScTarget();
sc->max_age = -1;
/* max_stale is specified as 0 if not specified in the header */
sc->target = target;
return sc;
}
void
httpHdrScTargetDestroy(HttpHdrScTarget * sc)
{
assert(sc);
sc->target.clean();
sc->content.clean();
delete sc;
}
HttpHdrScTarget *
httpHdrScTargetDup(const HttpHdrScTarget * sc)
{
HttpHdrScTarget *dup;
assert(sc);
dup = httpHdrScTargetCreate(sc->target.termedBuf());
dup->mask = sc->mask;
dup->max_age = sc->max_age;
dup->content = sc->content;
return dup;
}
/* union of two targets */
void
httpHdrScTargetJoinWith(HttpHdrScTarget * sc, const HttpHdrScTarget * new_sc)
{
assert(sc && new_sc);
/* TODO: check both targets are the same */
if (sc->max_age < 0)
sc->max_age = new_sc->max_age;
if (sc->max_stale < new_sc->max_stale)
sc->max_stale = new_sc->max_stale;
/* RC TODO: copy unique missing content stringlist entries */
sc->mask |= new_sc->mask;
}
extern http_hdr_sc_type &operator++ (http_hdr_sc_type &aHeader);
extern int operator - (http_hdr_sc_type const &anSc, http_hdr_sc_type const &anSc2);
/* copies non-extant fields from new_sc to this sc */
void
httpHdrScTargetMergeWith(HttpHdrScTarget * sc, const HttpHdrScTarget * new_sc)
{
http_hdr_sc_type c;
assert(sc && new_sc);
/* Don't touch the target - this is used to get the operations for a
* single surrogate
*/
for (c = SC_NO_STORE; c < SC_ENUM_END; ++c)
if (!EBIT_TEST(sc->mask, c) && EBIT_TEST(new_sc->mask,c)) {
EBIT_SET(sc->mask, c);
switch (c) {
case SC_MAX_AGE:
sc->max_age = new_sc->max_age;
sc->max_stale = new_sc->max_stale;
break;
case SC_CONTENT:
assert (sc->content.size() == 0);
sc->content = new_sc->content;
break;
default:
break;
}
}
}
/* negative max_age will clean old max_Age setting */
void
httpHdrScTargetSetMaxAge(HttpHdrScTarget * sc, int max_age)
{
assert(sc);
sc->max_age = max_age;
if (max_age >= 0)
EBIT_SET(sc->mask, SC_MAX_AGE);
else
EBIT_CLR(sc->mask, SC_MAX_AGE);
}
void
httpHdrScTargetUpdateStats(const HttpHdrScTarget * sc, StatHist * hist)
{
http_hdr_sc_type c;
assert(sc);
for (c = SC_NO_STORE; c < SC_ENUM_END; ++c)
if (EBIT_TEST(sc->mask, c))
statHistCount(hist, c);
}
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