Страницы справочника OS X

Эта страница руководства является частью версии 5.0 Инструментов XCode

Читать страницы руководства

FGETWS(3)                BSD Library Functions Manual                FGETWS(3)

NAME
     fgetws, fgetws_l -- get a line of wide characters from a stream

LIBRARY
     Standard C Library (libc, -lc)

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

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

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

     wchar_t *
     fgetws_l(wchar_t *restrict ws, int n, FILE *restrict stream, locale_t loc);

DESCRIPTION
     The fgetws() function reads at most one less than the number of characters specified by n from the
     given stream 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.

     While the fgetws() function uses the current locale, the fgetws_l() function may be passed a locale
     directly. See xlocale(3) for more information.

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; callers must use feof(3) and ferror(3) to determine which occurred.

ERRORS
     The fgetws() function will fail if:

     [EBADF]            The given stream 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
     feof(3), ferror(3), fgets(3), xlocale(3)

STANDARDS
     The fgetws() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

BSD                             August 6, 2002                             BSD