List.cc

#include "List.hh"
 
namespace Abstract::Memory {
 
MEMList::MEMList(u16 offset) {
    m_headObject = nullptr;
    m_tailObject = nullptr;
    m_numObjects = 0;
    m_offset = offset;
}
 
void MEMList::append(void *object) {
    ASSERT(object);
 
    if (!m_headObject) {
        setFirstObject(object);
    } else {
        MEMLink *link = getLink(object);
 
        link->m_prevObject = m_tailObject;
        link->m_nextObject = nullptr;
 
        getLink(m_tailObject)->m_nextObject = object;
        m_tailObject = object;
        ++m_numObjects;
    }
}
 
void MEMList::remove(void *object) {
    ASSERT(object);
 
    MEMLink *link = getLink(object);
 
    if (!link->m_prevObject) {
        m_headObject = link->m_nextObject;
    } else {
        getLink(link->m_prevObject)->m_nextObject = link->m_nextObject;
    }
 
    if (!link->m_nextObject) {
        m_tailObject = link->m_prevObject;
    } else {
        getLink(link->m_nextObject)->m_prevObject = link->m_prevObject;
    }
 
    link->m_prevObject = nullptr;
    link->m_nextObject = nullptr;
    --m_numObjects;
}
 
void *MEMList::getFirst() {
    return getNext(nullptr);
}
 
void *MEMList::getNext(void *object) {
    return object ? getLink(object)->m_nextObject : m_headObject;
}
 
void MEMList::setFirstObject(void *object) {
    ASSERT(object);
 
    MEMLink *link = getLink(object);
 
    link->m_nextObject = nullptr;
    link->m_prevObject = nullptr;
 
    m_headObject = object;
    m_tailObject = object;
    ++m_numObjects;
}
 
MEMLink *MEMList::getLink(void *object) {
    return reinterpret_cast<MEMLink *>(GetAddrNum(object) + m_offset);
}
 
} // namespace Abstract::Memory