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)
