/*
 * Copyright (C) 1996-2017 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */

/* DEBUG: section 65    HTTP Cache Control Header */

#include "Debug.h"
#include "defines.h"

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);
}