alloc && afree

#define ALLOCSIZE 10000

static char allocbuf[ALLOCSIZE];
static char *allocp = allocbuf;

char *alloc(int n)
{
    if(allocbuf + ALLOCSIZE - allocp >= n){
        allocp += n;
        return allocp - n;
    }else
        return 0;
}

void afree(char *p)
{
    if(p >= allocbuf && p < allocbuf + ALLOCSIZE)
        allocp = p;
}


#define ALLOCSIZE

static char allocbuf[ALLOCSIZE];
static char *allocp = allocbuf;

char *alloc(int n)
{
    if(allocbuf + ALLOCSIZE - allocp >= n){
        allocp += n;
        return allocp - n;
    }else
        return 0;
}

void afree(char *p)
{
    if(p >= allocbuf && p < allocbuf + ALLOCSIZE)
        allocp = p;
}