atoi.zh

ffc script atoi
{
    void run(){}

    int parse(int ptr)
    {
        int buffer[100];
        int q = -1; int w;
        do
        {
            ++q;
        } while(!isnumber(ptr[q]);
        //Add sign.
        if ( ptr[pos-1] == '-' )
        {
            buffer[0] = '-';
            ++w;
        }
        while(isnumber(ptr[q])
        {
            buffer[w] = ptr[q];
            +=w;
        }
        return atoi(buffer,0);
    }
    int parse(int ptr, int pos)
    {
        bool neg;
        int buffer[100];
        --pos;
        int w;
        do
        {
            ++pos;
        } while(!isnumber(ptr[pos]);
        //Add sign.
        if ( ptr[pos-1] == '-' )
        {
            buffer[0] = '-';
            ++w;
        }
        while(isnumber(ptr[pos])
        {
            buffer[w] = ptr[pos];
            ++w;
        }
        return atoi(buffer,0);
    }
    bool isnumber(int chr)
    {
        if ( chr >= '0' )
        {
            if ( chr <= '9' ) return true;
        }
        return false;
    }
    int get(int string, int pos)
    {
        int i=0;
        bool neg = false;
        if(string[pos + i] == '-'){
            ++i;
            neg = true;
        }
        int ret;
        for(ret = 0; isNumber(string[pos + i]); ++i)
            ret = ret*10 + (string[pos + i] - '0');
        return ret*Cond(neg, -1, 1);
    }
    int get(int string)
    {
        return atoi(string, 0);
    }
}