YaOS/malloc.c at master · ccfuncy/YaOS · GitHub

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struct map
{
    char *m_size;
    char *m_addr;
};

malloc(mp, size)
struct map *mp;
{
    register int a;
    register struct map *bp;

    for (bp = mp; bp ->m_size;bp++){
        if(bp->m_size >=size){
            bp->m_addr =+size;
            if((bp->m_size =-size)==0){
                do{
                    bp++;
                    (bp-1)->m_addr =bp->m_addr;
                }while((bp-1)->m_size = bp->m_size);
            }
            return a;
        }
    }
    return 0;
};

mfree(mp,size, aa)
struct map *mp;
{
    register struct map *bp;
    register int t;
    register int a;

    a=aa;
    for(bp=mp;bp->m_addr<=a &&bp->m_size!=0;bp++);
    if(bp > mp && ((bp-1)->m_addr + (bp-1)->m_size==a)){
        (bp-1)->m_size =+size;
        if(a+size == bp->m_addr){
            (bp-1)->m_size =+ bp->m_size;
            while(bp->m_size){
                bp++;
                (bp-1)->m_size =bp->m_size;
                (bp-1)->m_addr =bp->m_addr;
            }
        }
    }else{
        if(a + size ==bp->m_addr && bp->m_size){
            bp->m_addr =- size;
            bp->m_size =+ size;
        }else if (size){
            do{
                t=bp->m_addr;
                bp->m_addr=a;
                a=t;
                t=bp->m_size;
                bp->m_size=size;
                bp++;
            }while(size = t);
        }
    }
}