'\" t .\" Copyright (c) Bruno Haible .\" .\" SPDX-License-Identifier: GPL-2.0-or-later .\" .\" References consulted: .\" GNU glibc-2 source code and manual .\" Dinkumware C library reference http://www.dinkumware.com/ .\" OpenGroup's Single UNIX specification .\" http://www.UNIX-systems.org/online.html .\" ISO/IEC 9899:1999 .\" .\" Modified Tue Oct 16 23:18:40 BST 2001 by John Levon .TH fgetwc 3 2024-05-02 "Linux man-pages 6.9.1" .SH NAME fgetwc, getwc \- read a wide character from a FILE stream .SH LIBRARY Standard C library .RI ( libc ", " \-lc ) .SH SYNOPSIS .nf .B #include .B #include .P .BI "wint_t fgetwc(FILE *" stream ); .BI "wint_t getwc(FILE *" stream ); .fi .SH DESCRIPTION The .BR fgetwc () function is the wide-character equivalent of the .BR fgetc (3) function. It reads a wide character from \fIstream\fP and returns it. If the end of stream is reached, or if \fIferror(stream)\fP becomes true, it returns .BR WEOF . If a wide-character conversion error occurs, it sets \fIerrno\fP to \fBEILSEQ\fP and returns .BR WEOF . .P The .BR getwc () function or macro functions identically to .BR fgetwc (). It may be implemented as a macro, and may evaluate its argument more than once. There is no reason ever to use it. .P For nonlocking counterparts, see .BR unlocked_stdio (3). .SH RETURN VALUE On success, .BR fgetwc () returns the next wide-character from the stream. Otherwise, .B WEOF is returned, and .I errno is set to indicate the error. .SH ERRORS Apart from the usual ones, there is .TP .B EILSEQ The data obtained from the input stream does not form a valid character. .SH ATTRIBUTES For an explanation of the terms used in this section, see .BR attributes (7). .TS allbox; lbx lb lb l l l. Interface Attribute Value T{ .na .nh .BR fgetwc (), .BR getwc () T} Thread safety MT-Safe .TE .SH STANDARDS C11, POSIX.1-2008. .SH HISTORY POSIX.1-2001, C99. .SH NOTES The behavior of .BR fgetwc () depends on the .B LC_CTYPE category of the current locale. .P In the absence of additional information passed to the .BR fopen (3) call, it is reasonable to expect that .BR fgetwc () will actually read a multibyte sequence from the stream and then convert it to a wide character. .SH SEE ALSO .BR fgetws (3), .BR fputwc (3), .BR ungetwc (3), .BR unlocked_stdio (3)