man.bsd.lv manual page server

Manual Page Search Parameters
FGETWS(3) Library Functions Manual FGETWS(3)

fgetws, fgetws_lget a line of wide characters from a stream

library “libc”

#include <stdio.h>
#include <wchar.h>

wchar_t *
fgetws(wchar_t * restrict ws, int n, FILE * restrict fp);

#include <xlocale.h>

wchar_t *
fgetws_l(wchar_t * restrict ws, int n, FILE * restrict fp, locale_t locale);

The () and fgetws_l() functions read at most one less than the number of characters specified by n from the given fp and store 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.

The () function takes an explicit locale argument, whereas the fgetws() function uses the current global or per-thread locale.

Upon successful completion, fgetws() and fgetws_l() return ws. If end-of-file occurs before any characters are read, fgetws() and fgetws_l() return NULL and the buffer contents remain unchanged. If an error occurs, fgetws() and fgetws_l() return NULL and the buffer contents are indeterminate. The fgetws() and fgetws_l() functions do not distinguish between end-of-file and error, and callers must use feof(3) and ferror(3) to determine which occurred.

The fgetws() and fgetws_l() functions will fail if:

[]
The given fp argument is not a readable stream.
[]
The data obtained from the input stream does not form a valid multibyte character.

The functions fgetws() and fgetws_l() may also fail and set errno for any of the errors specified for the routines fflush(3), fstat(2), read(2), or malloc(3).

feof(3), ferror(3), fgets(3), xlocale(3)

The fgetws() function conforms to IEEE Std 1003.1-2001 (“POSIX.1”).

December 26, 2013 DragonFly-5.6.1