FGETWLN(3) | Library Functions Manual | FGETWLN(3) |
fgetwln
—
#include <stdio.h>
#include <wchar.h>
wchar_t *
fgetwln
(FILE
* restrict stream, size_t
* restrict len);
fgetwln
() function returns a pointer to the next
line from the stream referenced by stream. This line is
not a standard wide-character string as it does not end with
a terminating null wide character. The length of the line, including the final
newline, is stored in the memory location to which len
points. (Note, however, that if the line is the last in a file that does not
end in a newline, the returned text will not contain a newline.)
NULL
is returned. The
fgetwln
() function does not distinguish between
end-of-file and error; the routines
feof(3) and
ferror(3) must be used to
determine which occurred. If an error occurs, the global variable
errno is set to indicate the error. The end-of-file
condition is remembered, even on a terminal, and all subsequent attempts to
read will return NULL
until the condition is cleared
with clearerr(3).
The text to which the returned pointer points may be modified, provided that no changes are made beyond the returned size. These changes are lost as soon as the pointer becomes invalid.
EBADF
]The fgetwln
() function may also fail and
set errno for any of the errors specified for the
routines mbrtowc(3),
realloc(3), or
read(2).
July 16, 2004 | NetBSD 9.0 |