Путеводитель по Руководству Linux

  User  |  Syst  |  Libr  |  Device  |  Files  |  Other  |  Admin  |  Head  |



   fgetws.3p    ( 3 )

символьная строка из потока (character string from a stream)

Пролог (Prolog)

This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior),
       or the interface may not be implemented on Linux.

Имя (Name)

fgetws — get a wide-character string from a stream

Синопсис (Synopsis)

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

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


Описание (Description)

The functionality described on this reference page is aligned
       with the ISO C standard. Any conflict between the requirements
       described here and the ISO C standard is unintentional. This
       volume of POSIX.1‐2017 defers to the ISO C standard.

The fgetws() function shall read characters from the stream, convert these to the corresponding wide-character codes, place them in the wchar_t array pointed to by ws, until n-1 characters are read, or a <newline> is read, converted, and transferred to ws, or an end-of-file condition is encountered. The wide- character string, ws, shall then be terminated with a null wide- character code.

If an error occurs, the resulting value of the file position indicator for the stream is unspecified.

The fgetws() function may mark the last data access timestamp of the file associated with stream for update. The last data access timestamp shall be marked for update by the first successful execution of fgetwc(), fgetws(), fwscanf(), getwc(), getwchar(), vfwscanf(), vwscanf(), or wscanf() using stream that returns data not supplied by a prior call to ungetwc().


Возвращаемое значение (Return value)

Upon successful completion, fgetws() shall return ws.  If the
       end-of-file indicator for the stream is set, or if the stream is
       at end-of-file, the end-of-file indicator for the stream shall be
       set and fgetws() shall return a null pointer. If a read error
       occurs, the error indicator for the stream shall be set, fgetws()
       shall return a null pointer, and shall set errno to indicate the
       error.

Ошибки (Error)

Refer to fgetwc(3p).

The following sections are informative.


Примеры (Examples)

None.

Использование в приложениях (Application usage)

None.

Обоснование (Rationale)

None.

Будущие направления (Future directions)

None.

Смотри также (See also)

Section 2.5, Standard I/O Streams, fopen(3p), fread(3p)

The Base Definitions volume of POSIX.1‐2017, stdio.h(0p), wchar.h(0p)