/*
 * Copyright 2009-2013, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */


#include <package/hpkg/Strings.h>


namespace BPackageKit {

namespace BHPKG {

namespace BPrivate {


StringCache::StringCache()
{
}


StringCache::~StringCache()
{
        CachedString* cachedString = Clear(true);
        while (cachedString != NULL) {
                CachedString* next = cachedString->next;
                delete cachedString;
                cachedString = next;
        }
}


CachedString*
StringCache::Get(const char* value)
{
        CachedString* string = Lookup(value);
        if (string != NULL) {
                string->usageCount++;
                return string;
        }

        string = new CachedString;
        if (!string->Init(value)) {
                delete string;
                throw std::bad_alloc();
        }

        Insert(string);
        return string;
}


void
StringCache::Put(CachedString* string)
{
        if (string != NULL) {
                if (--string->usageCount == 0) {
                        Remove(string);
                        delete string;
                }
        }
}


}       // namespace BPrivate

}       // namespace BHPKG

}       // namespace BPackageKit