/*
 *
 * DEBUG: section 65    HTTP Cache Control Header
 *
 * 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.
 *
 */
bool
HttpHdrCc::isSet(http_hdr_cc_type id) const
{
    assert(id>=CC_PUBLIC && id < CC_ENUM_END);
    return EBIT_TEST(mask,id);
}

void
HttpHdrCc::setMask(http_hdr_cc_type id, bool newval)
{
    if (newval)
        EBIT_SET(mask,id);
    else
        EBIT_CLR(mask,id);
}

/// set a data member to a new value, and set the corresponding mask-bit.
/// if setting is false, then the mask-bit is cleared.
void
HttpHdrCc::setValue(int32_t &value, int32_t new_value, http_hdr_cc_type hdr, bool setting)
{
    if (setting) {
        if (new_value < 0) {
            debugs(65,3,HERE << "rejecting negative-value Cache-Control directive " << hdr
                   << " value " << new_value );
            return;
        }
    } else {
        new_value=-1; //rely on the convention that "unknown" is -1
    }

    value=new_value;
    setMask(hdr,setting);
}
