"Hrvoje Niksic" <[EMAIL PROTECTED]> said:
> OK. So the whole thing with errno is only necessary when dealing with
> Winsock errors. For errors from, say, fopen it's fine to use errno?
Yes.
> There is another possible approach. We already #define read and write
> to call Winsock stuff. We could add some more magic so that they and
> other Winsock invocations automatically set errno to last error value,
> translating Windows errors to errno errors.
Then all Winsock functions must be wrapped in such macro.
E.g (untested):
#define SOCK_SELECT(fd,rd,wr,ex,tv) ( \
int _rc = select (fd,rd,wr,ex,tv), \
(int)(WSAGetLastError() ? (errno = WSAGetLastError()) : (0)), \
_rc)
which could get messy; hard to return with a value from such a
macro.
> static struct errentry errtable[] = {
> { ERROR_INVALID_FUNCTION, EINVAL }, /* 1 */
> { ERROR_FILE_NOT_FOUND, ENOENT }, /* 2 */
XEmacs is probably using native Win functions (e.g CreateFile
instead of fopen), so it needs to map them to Unix errnos. Wget only
uses ANSI/Winsock functions, so only WS errors need attention.
Besides, on Windows there is no suiteable <errno.h> value for
e.g. ENOTCONN; we must use the <winsock*.h> value WSAENOTCONN.
So the XEmacs method wouldn't work.
--gv
