itoa base 10

itoa10.c

    inline int Stringify(int value, char* buffer, int bufferLen)
    {
        int i = bufferLen-1, tmp;
        char *ptr = buffer, c;
        
        for(; value && i; --i)
        {
            tmp = value;
            value/=10;
            *ptr++ = "9876543210123456789"[9 + tmp - value*10];
        }
        
        if((tmp < 0) && i)
        {
            *ptr++ = '-';
            --i;
        }
        if(i) *ptr-- = '\0';
        tmp = ptr - buffer;
        
        while(buffer < ptr)
        {
            c = *ptr;
            *ptr-- = *buffer;
            *buffer++ = c;
        }
        
        return tmp;
    }