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authorRoland McGrath <roland@gnu.org>1995-11-20 03:48:11 +0000
committerRoland McGrath <roland@gnu.org>1995-11-20 03:48:11 +0000
commit96aa2d94a2355cdc55c96e808d14a0e7f2ebe77d (patch)
treef7c87e6742af0707b858a1387ca85b679aa8d13e /libio/filedoalloc.c
parenta5a81fecc7194d050066265a15b1ba8bc3abc627 (diff)
downloadglibc-96aa2d94a2355cdc55c96e808d14a0e7f2ebe77d.tar.gz
Sat Nov 18 16:46:01 1995 Ulrich Drepper <drepper@gnu.ai.mit.edu>
* libio/Makefile, libio/cleanup.c, libio/clearerr.c, libio/feof.c, libio/ferror.c, libio/fgetc.c, libio/filedoalloc.c, libio/fileno.c, libio/fileops.c, libio/fputc.c, libio/freopen.c, libio/fseek.c, libio/genops.c, libio/getc.c, libio/getchar.c, libio/iofclose.c, libio/iofdopen.c, libio/iofflush.c, libio/iofgetpos.c, libio/iofgets.c, libio/iofopen.c, libio/iofprintf.c, libio/iofputs.c, libio/iofread.c, libio/iofscanf.c, libio/iofsetpos.c, libio/ioftell.c, libio/iofwrite.c, libio/iogetdelim.c, libio/iogetline.c, libio/iogets.c, libio/iolibio.h, libio/iopadn.c, libio/ioprims.c, libio/ioputs.c, libio/ioseekoff.c, libio/ioseekpos.c, libio/iosetbuffer.c, libio/iosetvbuf.c, libio/iosprintf.c, libio/ioungetc.c, libio/iovsprintf.c, libio/iovsscanf.c, libio/libio.h, libio/libioP.h, libio/putc.c, libio/putchar.c, libio/rewind.c, libio/setbuf.c, libio/setlinebuf.c, libio/stdfiles.c, libio/stdio.c, libio/stdio.h, libio/strfile.h, libio/strops.c, libio/vasprintf.c, libio/vscanf.c, libio/vsnprintf.c: New files. Slightly modified version from Linux libc. * libio/memstream.c, libio/vdprintf.c: New files for functions not (yet) part of GNU libio. * libio/iofopncook.c: Implementation of `fopencookie', mainly written by Per Bothner. * stdio-common/getline.c: Adapted to libio. * stdio-common/snprintf.c: Adapted to libio. * stdio-common/vfprintf.c: Adapted to libio. * stdio-common/vfscanf.c: Adapted to libio. * sysdeps/posix/tempname.c: Adapted to libio.
Diffstat (limited to 'libio/filedoalloc.c')
-rw-r--r--libio/filedoalloc.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/libio/filedoalloc.c b/libio/filedoalloc.c
new file mode 100644
index 0000000000..8ab1738a7c
--- /dev/null
+++ b/libio/filedoalloc.c
@@ -0,0 +1,103 @@
+/*
+Copyright (C) 1993 Free Software Foundation
+
+This file is part of the GNU IO Library. This library 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 library 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 library; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+As a special exception, if you link this library with files
+compiled with a GNU compiler to produce an executable, this does not cause
+the resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why
+the executable file might be covered by the GNU General Public License. */
+
+/*
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* Modified for GNU iostream by Per Bothner 1991, 1992. */
+
+#define _POSIX_SOURCE
+#include "libioP.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef __STDC__
+#include <stdlib.h>
+#endif
+
+/* If this function pointer is non-zero, we should call it.
+ It's supposed to make sure _IO_cleanup gets called on exit.
+ We call it from _IO_file_doallocate, since that is likely
+ to get called by any program that does buffered I/O. */
+void (*_IO_cleanup_registration_needed)();
+
+/*
+ * Allocate a file buffer, or switch to unbuffered I/O.
+ * Per the ANSI C standard, ALL tty devices default to line buffered.
+ *
+ * As a side effect, we set __SOPT or __SNPT (en/dis-able fseek
+ * optimisation) right after the _fstat() that finds the buffer size.
+ */
+
+int
+DEFUN(_IO_file_doallocate, (fp),
+ register _IO_FILE *fp)
+{
+ register _IO_size_t size;
+ int couldbetty;
+ register char *p;
+ struct stat st;
+
+ if (_IO_cleanup_registration_needed)
+ (*_IO_cleanup_registration_needed)();
+
+ if (fp->_fileno < 0 || _IO_SYSSTAT (fp, &st) < 0)
+ {
+ couldbetty = 0;
+ size = _IO_BUFSIZ;
+#if 0
+ /* do not try to optimise fseek() */
+ fp->_flags |= __SNPT;
+#endif
+ }
+ else
+ {
+ couldbetty = S_ISCHR(st.st_mode);
+#if _IO_HAVE_ST_BLKSIZE
+ size = st.st_blksize <= 0 ? _IO_BUFSIZ : st.st_blksize;
+#else
+ size = _IO_BUFSIZ;
+#endif
+ }
+ p = ALLOC_BUF(size);
+ if (p == NULL)
+ return EOF;
+ _IO_setb(fp, p, p+size, 1);
+ if (couldbetty && isatty(fp->_fileno))
+ fp->_flags |= _IO_LINE_BUF;
+ return 1;
+}