NAME
fgetws —
get a line of wide characters from a
stream
SYNOPSIS
#include <stdio.h>
#include <wchar.h>
wchar_t *
fgetws(wchar_t
* restrict ws, int
n, FILE * restrict
fp);
DESCRIPTION
The
fgetws()
function reads at most one less than the number of characters specified by
n from the given fp and stores
them in the wide-character string ws. Reading stops
when a newline character is found, at end-of-file, or error. The newline, if
any, is retained. If any characters are read and there is no error, a
‘\0’ character is appended to end the
string.
RETURN VALUES
Upon successful completion, fgetws()
returns ws. If end-of-file occurs before any
characters are read, fgetws() returns
NULL and the buffer contents remain unchanged. If an
error occurs, fgetws() returns
NULL and the buffer contents are indeterminate. The
fgetws() function does not distinguish between
end-of-file and error, and callers must use
feof(3) and
ferror(3)
to determine which occurred.
ERRORS
- [
EBADF] - The given fp argument is not a readable stream.
- [
EILSEQ] - The data obtained from the input stream does not form a valid multibyte character.
The function fgetws() may also fail and
set errno for any of the errors specified for the
routines fflush(3), fstat(2), read(2), or malloc(3).
SEE ALSO
STANDARDS
The fgetws() function conforms to
IEEE Std 1003.1-2001 (“POSIX.1”).