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port the extended stdio primitives to EMX+GCC
|
From: |
Bruno Haible |
|
Subject: |
port the extended stdio primitives to EMX+GCC |
|
Date: |
Thu, 10 Apr 2008 01:07:00 +0200 |
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User-agent: |
KMail/1.5.4 |
Hi,
The system that Elbert Pol is talking about is derived from emx+gcc (the
old but well-known POSIX implementation for DOS and OS/2 [the DOS part was
much more reliable than DJGPP]).
I'm committing first a port for emx+gcc. Untested.
Jim, at the end you find a patch to m4/fpending.m4, part of the same family
of functions. Is that OK to commit? I derived that information from the fflush
implementation which goes roughly like this:
n = stream->_ptr - stream->_buffer;
if (n > 0 && _stream_write (stream->_handle, stream->_buffer, n) <= 0)
{
stream->_flags |= _IOERR;
result = EOF;
}
I put the EMX case quite far down in the list, to minimize the risk of
disturbing an already supported platform.
2008-04-08 Bruno Haible <address@hidden>
Add tentative support for emx+gcc.
* lib/fbufmode.c (fbufmode) [__EMX__]: Add conditional code.
* lib/fpurge.c (fpurge): Likewise.
* lib/freadable.c (freadable): Likewise.
* lib/freadahead.c (freadahead): Likewise.
* lib/freading.c (freading): Likewise.
* lib/freadptr.c (freadptr): Likewise.
* lib/freadseek.c (freadptrinc): Likewise.
* lib/fseeko.c (rpl_fseeko): Likewise.
* lib/fseterr.c (fseterr): Likewise.
* lib/fwritable.c (fwritable): Likewise.
* lib/fwriting.c (fwriting): Likewise.
*** lib/fbufmode.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/fbufmode.c 2008-04-09 13:05:04.000000000 +0200
***************
*** 46,51 ****
--- 46,53 ----
if (fp->_flags & __SNBF)
return _IONBF;
return _IOFBF;
+ #elif defined __EMX__ /* emx+gcc */
+ return fp->_flags & (_IOLBF | _IONBF | _IOFBF);
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if HAVE___FLBF /* Solaris >= 7 */
if (__flbf (fp))
*** lib/fpurge.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/fpurge.c 2008-04-10 00:20:27.000000000 +0200
***************
*** 90,95 ****
--- 90,101 ----
fp_ub._base = NULL;
}
return 0;
+ # elif defined __EMX__ /* emx+gcc */
+ fp->_ptr = fp->_buffer;
+ fp->_rcount = 0;
+ fp->_wcount = 0;
+ fp->_ungetc_count = 0;
+ return 0;
# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined _SCO_DS /* OpenServer */
# define _base __base
*** lib/freadable.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/freadable.c 2008-04-09 13:10:21.000000000 +0200
***************
*** 29,34 ****
--- 29,36 ----
return (fp->_flags & _IO_NO_READS) == 0;
#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X,
Cygwin */
return (fp->_flags & (__SRW | __SRD)) != 0;
+ #elif defined __EMX__ /* emx+gcc */
+ return (fp->_flags & (_IORW | _IOREAD)) != 0;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined _SCO_DS /* OpenServer */
# define _flag __flag
*** lib/freadahead.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/freadahead.c 2008-04-10 00:41:06.000000000 +0200
***************
*** 43,48 ****
--- 43,56 ----
return 0;
return fp->_r
+ (HASUB (fp) ? fp->_ur : 0);
+ #elif defined __EMX__ /* emx+gcc */
+ if ((fp->_flags & _IOWRT) != 0)
+ return 0;
+ /* Note: fp->_ungetc_count > 0 implies fp->_rcount <= 0,
+ fp->_ungetc_count = 0 implies fp->_rcount >= 0. */
+ /* equivalent to
+ (fp->_ungetc_count == 0 ? fp->_rcount : fp->_ungetc_count - fp->_rcount)
*/
+ return (fp->_rcount > 0 ? fp->_rcount : fp->_ungetc_count - fp->_rcount);
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
# define fp_ ((struct { unsigned char *_ptr; \
*** lib/freading.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/freading.c 2008-04-09 23:56:35.000000000 +0200
***************
*** 35,40 ****
--- 35,42 ----
&& fp->_IO_read_base != NULL));
#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X,
Cygwin */
return (fp->_flags & __SRD) != 0;
+ #elif defined __EMX__ /* emx+gcc */
+ return (fp->_flags & _IOREAD) != 0;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined _SCO_DS /* OpenServer */
# define _flag __flag
*** lib/freadptr.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/freadptr.c 2008-04-10 00:41:49.000000000 +0200
***************
*** 19,24 ****
--- 19,26 ----
/* Specification. */
#include "freadptr.h"
+ #include <stdlib.h>
+
const char *
freadptr (FILE *fp, size_t *sizep)
{
***************
*** 41,46 ****
--- 43,59 ----
return NULL;
*sizep = size;
return (const char *) fp->_p;
+ #elif defined __EMX__ /* emx+gcc */
+ if ((fp->_flags & _IOWRT) != 0)
+ return NULL;
+ /* Note: fp->_ungetc_count > 0 implies fp->_rcount <= 0,
+ fp->_ungetc_count = 0 implies fp->_rcount >= 0. */
+ if (fp->_rcount <= 0)
+ return NULL;
+ if (fp->_ungetc_count == 0)
+ abort ();
+ *sizep = fp->_rcount;
+ return fp->_ptr;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
# define fp_ ((struct { unsigned char *_ptr; \
*** lib/freadseek.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/freadseek.c 2008-04-10 00:00:38.000000000 +0200
***************
*** 37,42 ****
--- 37,45 ----
#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X,
Cygwin */
fp->_p += increment;
fp->_r -= increment;
+ #elif defined __EMX__ /* emx+gcc */
+ fp->_ptr += increment;
+ fp->_rcount -= increment;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
# define fp_ ((struct { unsigned char *_ptr; \
*** lib/fseeko.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/fseeko.c 2008-04-10 00:44:26.000000000 +0200
***************
*** 70,75 ****
--- 70,80 ----
? fp->_bf._size
: 0)
&& fp_ub._base == NULL)
+ #elif defined __EMX__ /* emx+gcc */
+ if (fp->_ptr == fp->_buffer
+ && fp->_rcount == 0
+ && fp->_wcount == 0
+ && fp->_ungetc_count == 0)
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
# define fp_ ((struct { unsigned char *_ptr; \
***************
*** 117,122 ****
--- 122,129 ----
fp->_offset = pos;
fp->_flags |= __SOFF;
fp->_flags &= ~__SEOF;
+ #elif defined __EMX__ /* emx+gcc */
+ fp->_flags &= ~_IOEOF;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined _SCO_DS /* OpenServer */
# define _flag __flag
*** lib/fseterr.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/fseterr.c 2008-04-09 13:08:13.000000000 +0200
***************
*** 31,36 ****
--- 31,38 ----
fp->_flags |= _IO_ERR_SEEN;
#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X,
Cygwin */
fp->_flags |= __SERR;
+ #elif defined __EMX__ /* emx+gcc */
+ fp->_flags |= _IOERR;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
# define fp_ ((struct { unsigned char *_ptr; \
*** lib/fwritable.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/fwritable.c 2008-04-09 13:10:49.000000000 +0200
***************
*** 29,34 ****
--- 29,36 ----
return (fp->_flags & _IO_NO_WRITES) == 0;
#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X,
Cygwin */
return (fp->_flags & (__SRW | __SWR)) != 0;
+ #elif defined __EMX__ /* emx+gcc */
+ return (fp->_flags & (_IORW | _IOWRT)) != 0;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined _SCO_DS /* OpenServer */
# define _flag __flag
*** lib/fwriting.c.orig 2008-04-10 00:52:26.000000000 +0200
--- lib/fwriting.c 2008-04-09 23:56:45.000000000 +0200
***************
*** 29,34 ****
--- 29,36 ----
return (fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) != 0;
#elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X,
Cygwin */
return (fp->_flags & __SWR) != 0;
+ #elif defined __EMX__ /* emx+gcc */
+ return (fp->_flags & _IOWRT) != 0;
#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris,
OpenServer, mingw */
# if defined _SCO_DS /* OpenServer */
# define _flag __flag
*** m4/fpending.m4.orig 2008-04-10 00:52:26.000000000 +0200
--- m4/fpending.m4 2008-04-10 00:51:17.000000000 +0200
***************
*** 1,6 ****
! #serial 12
! # Copyright (C) 2000, 2001, 2004, 2005, 2006, 2007 Free Software
# Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
--- 1,6 ----
! #serial 13
! # Copyright (C) 2000, 2001, 2004, 2005, 2006, 2007, 2008 Free Software
# Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
***************
*** 53,58 ****
--- 53,61 ----
'# old glibc iostream?' \
'fp->_pptr - fp->_pbase' \
\
+ '# emx+gcc' \
+ 'fp->_ptr - fp->_buffer' \
+ \
'# VMS' \
'(*fp)->_ptr - (*fp)->_base' \
\
- port the extended stdio primitives to EMX+GCC,
Bruno Haible <=