diff options
Diffstat (limited to 'lib/fpending.c')
| -rw-r--r-- | lib/fpending.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/lib/fpending.c b/lib/fpending.c index e917f4f..ce93604 100644 --- a/lib/fpending.c +++ b/lib/fpending.c @@ -1,5 +1,5 @@ /* fpending.c -- return the number of pending output bytes on a stream - Copyright (C) 2000, 2004, 2006-2007, 2009-2013 Free Software Foundation, + Copyright (C) 2000, 2004, 2006-2007, 2009-2016 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify @@ -19,12 +19,42 @@ #include <config.h> +/* Specification. */ #include "fpending.h" +#include "stdio-impl.h" + /* Return the number of pending (aka buffered, unflushed) bytes on the stream, FP, that is open for writing. */ size_t __fpending (FILE *fp) { - return PENDING_OUTPUT_N_BYTES; + /* 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_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ + return fp->_IO_write_ptr - fp->_IO_write_base; +#elif defined __sferror || defined __DragonFly__ || defined __ANDROID__ + /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */ + return fp->_p - fp->_bf._base; +#elif defined __EMX__ /* emx+gcc */ + return fp->_ptr - fp->_buffer; +#elif defined __minix /* Minix */ + return fp_->_ptr - fp_->_buf; +#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, MSVC, NonStop Kernel */ + return (fp_->_ptr ? fp_->_ptr - fp_->_base : 0); +#elif defined __UCLIBC__ /* uClibc */ + return (fp->__modeflags & __FLAG_WRITING ? fp->__bufpos - fp->__bufstart : 0); +#elif defined __QNX__ /* QNX */ + return (fp->_Mode & 0x2000 /*_MWRITE*/ ? fp->_Next - fp->_Buf : 0); +#elif defined __MINT__ /* Atari FreeMiNT */ + return fp->__bufp - fp->__buffer; +#elif defined EPLAN9 /* Plan9 */ + return fp->wp - fp->buf; +#elif defined __VMS /* VMS */ + return (*fp)->_ptr - (*fp)->_base; +#else +# error "Please port gnulib fpending.c to your platform!" + return 1; +#endif } |