Page MenuHomeSoftware Heritage
Files F9697663

fpending.m4
No OneTemporary
Actions

fpending.m4
View Options

#serial 10
# Copyright (C) 2000, 2001, 2004, 2005, 2006 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
dnl From Jim Meyering
dnl Using code from emacs, based on suggestions from Paul Eggert
dnl and Ulrich Drepper.
dnl Find out how to determine the number of pending output bytes on a stream.
dnl glibc (2.1.93 and newer) and Solaris provide __fpending. On other systems,
dnl we have to grub around in the FILE struct.
AC_DEFUN([gl_FUNC_FPENDING],
[
AC_CHECK_HEADERS_ONCE(stdio_ext.h)
AC_REPLACE_FUNCS([__fpending])
fp_headers='
# include <stdio.h>
# if HAVE_STDIO_EXT_H
# include <stdio_ext.h>
# endif
'
AC_CHECK_DECLS([__fpending], , , $fp_headers)
if test $ac_cv_func___fpending = no; then
AC_CACHE_CHECK(
[how to determine the number of pending output bytes on a stream],
ac_cv_sys_pending_output_n_bytes,
[
for ac_expr in \
\
'# glibc2' \
'fp->_IO_write_ptr - fp->_IO_write_base' \
\
'# traditional Unix' \
'fp->_ptr - fp->_base' \
\
'# BSD' \
'fp->_p - fp->_bf._base' \
\
'# SCO, Unixware' \
'(fp->__ptr ? fp->__ptr - fp->__base : 0)' \
\
'# old glibc?' \
'fp->__bufp - fp->__buffer' \
\
'# old glibc iostream?' \
'fp->_pptr - fp->_pbase' \
\
'# VMS' \
'(*fp)->_ptr - (*fp)->_base' \
\
'# e.g., DGUX R4.11; the info is not available' \
1 \
; do
# Skip each embedded comment.
case "$ac_expr" in '#'*) continue;; esac
AC_TRY_COMPILE(
[#include <stdio.h>
],
[FILE *fp = stdin; (void) ($ac_expr);],
fp_done=yes
)
test "$fp_done" = yes && break
done
ac_cv_sys_pending_output_n_bytes=$ac_expr
]
)
AC_DEFINE_UNQUOTED(PENDING_OUTPUT_N_BYTES,
$ac_cv_sys_pending_output_n_bytes,
[the number of pending output bytes on stream `fp'])
fi
])

File Metadata

Mime Type
text/x-m4
Expires
Tue, Aug 19, 12:31 AM (2 w, 16 h ago)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
3459383

Event Timeline

About · Developer information · Legal