>Bart Smaalders <bart.smaald...@sun.com> wrote:
>
>> All early strcpy implementations handle some overlapping copies
>> incorrectly. In order to determine safety, it is necessary to
>> find the length of the string before beginning the copy.
>
>Could you please give us an example where this typical implementation:
>
>char *
>strcpy(s1, s2)
> register char *s1;
> register const char *s2;
>{
> char *ret =3D s1;
>
> while ((*s1++ =3D *s2++) !=3D '\0')
> ;
> return (ret);
>}
>
>would handle overlapped strings incorrectly?
char buf[] = "foo";
strcpy(buf+3, buf);
It's clearly not useful.
You want this to work:
char buf[] = "foo\\abaz"";
strcpy(buf+4, buf+5); /* Remove "\" at position 4. */
Casper
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