Support non-blocking pipe I/O in write() on native Windows. * lib/unistd.in.h (write): Enable replacement also if GNULIB_UNISTD_H_NONBLOCKING is 1. * lib/write.c: Enable replacement also if GNULIB_NONBLOCKING. (rpl_write): When failing to write on a non-blocking pipe, change errno from ENOSPC to EAGAIN. * lib/stdio.in.h (fprintf, fputc, fputs, fwrite, printf, putc, putchar, puts, vfprintf, vprintf): Enable replacement also if GNULIB_STDIO_H_NONBLOCKING is 1. * lib/stdio-write.c: Enable replacements also if GNULIB_NONBLOCKING. (CLEAR_ERRNO, HANDLE_ENOSPC): New macros. (CLEAR_LastError, HANDLE_ERROR_NO_DATA): New macros, extracted from CALL_WITH_SIGPIPE_EMULATION. (CALL_WITH_SIGPIPE_EMULATION): Use them. * m4/nonblocking.m4: New file. * m4/write.m4 (gl_FUNC_WRITE): Enable REPLACE_WRITE also if required for non-blocking I/O support. * m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize GNULIB_UNISTD_H_NONBLOCKING. * m4/stdio_h.m4 (gl_STDIO_H): Enable REPLACE_STDIO_WRITE_FUNCS also if required for non-blocking I/O support. (gl_STDIO_H_DEFAULTS): Initialize GNULIB_STDIO_H_NONBLOCKING. * modules/nonblocking (Files): Add m4/nonblocking.m4, lib/stdio-write.c, m4/asm-underscore.m4. (Depends-on): Add stdio, unistd. (configure.ac): Invoke gl_NONBLOCKING_IO. Define GNULIB_NONBLOCKING. Set GNULIB_STDIO_H_NONBLOCKING, GNULIB_UNISTD_H_NONBLOCKING. * modules/unistd (Makefile.am): Substitute GNULIB_UNISTD_H_NONBLOCKING. * modules/stdio (Makefile.am): Substitute GNULIB_STDIO_H_NONBLOCKING. * doc/posix-functions/fprintf.texi: Mention 'nonblocking' module and problem with non-blocking pipes. * doc/posix-functions/fputc.texi: Likewise. * doc/posix-functions/fputs.texi: Likewise. * doc/posix-functions/fwrite.texi: Likewise. * doc/posix-functions/printf.texi: Likewise. * doc/posix-functions/putc.texi: Likewise. * doc/posix-functions/putchar.texi: Likewise. * doc/posix-functions/puts.texi: Likewise. * doc/posix-functions/vfprintf.texi: Likewise. * doc/posix-functions/vprintf.texi: Likewise. * doc/posix-functions/write.texi: Likewise.

/* A substitute for ISO C99 <ctype.h>, for platforms on which it is incomplete.

   Copyright (C) 2009-2011 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* Written by Bruno Haible.  */

/*
 * ISO C 99 <ctype.h> for platforms on which it is incomplete.
 * <http://www.opengroup.org/onlinepubs/9699919799/basedefs/ctype.h.html>
 */

#ifndef _GL_CTYPE_H

#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
#endif
@PRAGMA_COLUMNS@

/* Include the original <ctype.h>.  */
/* The include_next requires a split double-inclusion guard.  */
#@INCLUDE_NEXT@ @NEXT_CTYPE_H@

#ifndef _GL_CTYPE_H
#define _GL_CTYPE_H

/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */

/* The definition of _GL_WARN_ON_USE is copied here.  */

/* Return non-zero if c is a blank, i.e. a space or tab character.  */
#if @GNULIB_ISBLANK@
# if !@HAVE_ISBLANK@
_GL_EXTERN_C int isblank (int c);
# endif
#elif defined GNULIB_POSIXCHECK
# undef isblank
# if HAVE_RAW_DECL_ISBLANK
_GL_WARN_ON_USE (isblank, "isblank is unportable - "
                 "use gnulib module isblank for portability");
# endif
#endif

#endif /* _GL_CTYPE_H */
#endif /* _GL_CTYPE_H */