/* Retrieve information about a FILE stream.
Copyright (C) 2007-2008 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "freadahead.h"
const char *
freadptr (FILE *fp)
{
/* Keep this code in sync with freadahead! */
#if defined _IO_ferror_unlocked /* GNU libc, BeOS */
return (const char *) fp->_IO_read_ptr;
#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
return (const char *) fp->_p;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
# define fp_ ((struct { unsigned char *_ptr; \
unsigned char *_base; \
unsigned char *_end; \
long _cnt; \
int _file; \
unsigned int _flag; \
} *) fp)
return (const char *) fp_->_ptr;
# else
return (const char *) fp->_ptr;
# endif
#elif defined __UCLIBC__ /* uClibc */
# ifdef __STDIO_BUFFERS
return (const char *) fp->__bufpos;
# else
return NULL;
# endif
#elif defined __QNX__ /* QNX */
return (const char *) fp->_Next;
#else
#error "Please port gnulib freadptr.c to your platform! Look at the definition of getc, getc_unlocked on your system, then report this to bug-gnulib."
#endif
}
