Mercurial > hg > octave-lyh > gnulib-hg
changeset 8689:1476896d10ae
New module 'fwritable'.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 14 Apr 2007 00:14:56 +0000 |
parents | 2483fea898a0 |
children | 3283ac3682b6 |
files | ChangeLog lib/fwritable.c lib/fwritable.h m4/fwritable.m4 modules/fwritable |
diffstat | 5 files changed, 126 insertions(+), 0 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2007-04-13 Bruno Haible <bruno@clisp.org> + + * modules/fwritable: New file. + * lib/fwritable.h: New file. + * lib/fwritable.c: New file. + * m4/fwritable.m4: New file. + 2007-04-13 Bruno Haible <bruno@clisp.org> * modules/freadable-tests: New file.
new file mode 100644 --- /dev/null +++ b/lib/fwritable.c @@ -0,0 +1,38 @@ +/* Retrieve information about a FILE stream. + Copyright (C) 2007 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. */ + +#include <config.h> + +/* Specification. */ +#include "fwritable.h" + +bool +fwritable (FILE *fp) +{ + /* Most systems provide FILE as a struct and the necessary bitmask in + <stdio.h>, because they need it for implementing getc() and putc() as + fast macros. */ +#if defined _IO_ferror_unlocked /* GNU libc, BeOS */ + return (fp->_flags & _IO_NO_WRITES) == 0; +#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */ + return (fp->_flags & (__SRW | __SWR)) != 0; +#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */ + return (fp->_flag & (_IORW | _IOWRT)) != 0; +#else + #error "Please port gnulib fwritable.c to your platform!" +#endif +}
new file mode 100644 --- /dev/null +++ b/lib/fwritable.h @@ -0,0 +1,43 @@ +/* Retrieve information about a FILE stream. + Copyright (C) 2007 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. */ + +#include <stdbool.h> +#include <stdio.h> + +/* Return true if the stream STREAM supports writing, false if it supports + only reading. + STREAM must not be wide-character oriented. + The result doesn't change until the stream is closed or re-opened. */ + +#if HAVE___FWRITABLE /* glibc >= 2.2, Solaris >= 7 */ + +# include <stdio_ext.h> +# define fwritable(stream) (__fwritable (stream) != 0) + +#else + +# ifdef __cplusplus +extern "C" { +# endif + +extern bool fwritable (FILE *stream); + +# ifdef __cplusplus +} +# endif + +#endif
new file mode 100644 --- /dev/null +++ b/m4/fwritable.m4 @@ -0,0 +1,13 @@ +# fwritable.m4 serial 1 +dnl Copyright (C) 2007 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FUNC_FWRITABLE], +[ + AC_CHECK_FUNCS_ONCE([__fwritable]) + if test $ac_cv_func___fwritable = no; then + AC_LIBOBJ([fwritable]) + fi +])
new file mode 100644 --- /dev/null +++ b/modules/fwritable @@ -0,0 +1,25 @@ +Description: +fwritable() function: Determine whether a FILE stream supports writing. + +Files: +lib/fwritable.h +lib/fwritable.c +m4/fwritable.m4 + +Depends-on: +stdbool + +configure.ac: +gl_FUNC_FWRITABLE + +Makefile.am: + +Include: +"fwritable.h" + +License: +LGPL + +Maintainer: +Bruno Haible, Eric Blake +