Ralf Quint wrote:
> On 2/9/2015 7:57 PM, Frantisek Hanzlik wrote:
>> Hi Eric,
>> thanks for help,
>>
>> Eric Auer wrote:
>>> Hi Franta,
>>>
>>>> struct dosemu_detect {
>>>> char magic[8];
>>>> unsigned char ver[4];
>>>> };
>>>> static struct dosemu_detect far *p = (void far*) 0xF000FFE0;
>>> Note that the way how you create far pointers can differ
>>> between compilers. In particular, with any 32 bit memory
>>> model, things would look quite differently. Just saying.
>> Pointers and things around them are for me still a little
>> incomprehensible ;)
> If you want to program in C, then there is no way around it. For almost
> everything, and in particular when working with strings, you need to
> know what you are doing, as the C compiler is doing exactly what you are
> telling it to do, which in turn might not be what you want it to do...;-)
I want intelligent IDE with voice input... ;)
>>
>>>> char magicexp[]="$DOSEMU$"; // expected string when on
>>>> DOSEMU
>>>>
>>>> if (strcmp(p->magic, magicexp)) // p->magic == "$DOSEMU$" ?
>>> You cannot strcmp this because the string is no C style
>>> string with a NUL character at the end. You could use
>>> strncmp(string1, string2, 8) to compare only the first
>>> eight bytes, which will probably work fine for you :-)
>> But 'magicexp' is null-terminated string, yes?
> No.
Are You sure? From what I've seen at several web articles (e.g. here
http://www.tutorialspoint.com/cprogramming/c_strings.htm
https://www.youtube.com/watch?v=Zy2bNkSxv8M
), I got the impression that string declared as
char mystring[]="$DOSEMU$";
is in memory stored as null-terminated string.
Franta Hanzlik
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