1 files changed, 231 insertions, 0 deletions

diff --git a/private/crt32/iostream/filebuf1.cxx b/private/crt32/iostream/filebuf1.cxx
new file mode 100644
index 000000000..6079d69e2
--- /dev/null
+++ b/private/crt32/iostream/filebuf1.cxx
@@ -0,0 +1,231 @@
+/***
+*filebuf1.cxx - non-core filebuf member functions.
+*
+*	Copyright (c) 1991-1992, Microsoft Corporation.  All rights reserved.
+*
+*Purpose:
+*	Contains optional member functions for filebuf class.
+*
+*Revision History:
+*	09-21-91  KRS	Created.  Split off from fstream.cxx.
+*	10-24-91  KRS	C700 #4909: Typo/logic bug in setmode().
+*	11-06-91  KRS	Add support for share mode in open().  Use _sopen().
+*	08-19-92  KRS	Use _SH_DENYNO for default mode for NT.
+*	03-02-93  SKS	Avoid setting _O_TRUNC when noreplace is specified
+*
+*******************************************************************************/
+
+#include <cruntime.h>
+#include <internal.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <share.h>
+#include <sys\types.h>
+#include <io.h>
+#include <fstream.h>
+#pragma hdrstop
+
+#include <sys\stat.h>
+
+/***
+*filebuf* filebuf::attach(filedesc fd) - filebuf attach function
+*
+*Purpose:
+*	filebuf attach() member function.  Attach filebuf object to the
+*	given file descriptor previously obtained from _open() or _sopen().
+*
+*Entry:
+*	fd = file descriptor.
+*
+*Exit:
+*	Returns this pointer or NULL if error.
+*
+*Exceptions:
+*	Returns NULL if fd = -1.
+*
+*******************************************************************************/
+filebuf* filebuf::attach(filedesc fd)
+{
+    if (x_fd!=-1)
+	return NULL;	// error if already attached
+
+    lock();
+    x_fd = fd;
+    if ((fd!=-1) && (!unbuffered()) && (!ebuf()))
+	{
+        char * sbuf = new char[BUFSIZ];
+	if (!sbuf)
+	    {
+	    unbuffered(1);
+	    }
+	else
+	    {
+	    streambuf::setb(sbuf,sbuf+BUFSIZ,1);
+	    }
+	}
+    unlock();
+    return this; 
+}
+
+/***
+*filebuf* filebuf::open(const char* name, int mode, int share) - filebuf open
+*
+*Purpose:
+*	filebuf open() member function.  Open a file and attach to filebuf
+*	object.
+*
+*Entry:
+*	name  = file name string.
+*	mode  = open mode: Combination of ios:: in, out, binary, nocreate, app,
+*		ate, noreplace and trunc.  See spec. for details on behavior.
+*	share = share mode (optional).  sh_compat, sh_none, sh_read, sh_write.
+*
+*Exit:
+*	Returns this pointer or NULL if error.
+*
+*Exceptions:
+*	Returns NULL if filebuf is already attached to an open file, or if
+*	invalid mode options, or if call to _sopen or filebuf::seekoff() fails.
+*
+*******************************************************************************/
+filebuf* filebuf::open(const char* name, int mode, int share)
+{
+    int dos_mode;
+    int smode;
+    if (x_fd!=-1)
+	return NULL;	// error if already open
+// translate mode argument
+    dos_mode = (mode & ios::binary) ? O_BINARY : O_TEXT;
+    if (!(mode & ios::nocreate))
+	dos_mode |= O_CREAT;
+    if (mode & ios::noreplace)
+	dos_mode |= O_EXCL;
+    if (mode & ios::app)
+	{
+	mode |= ios::out;
+	dos_mode |= O_APPEND;
+	}
+    if (mode & ios::trunc)
+	{
+	mode |= ios::out;  // IMPLIED
+	dos_mode |= O_TRUNC;
+	}
+    if (mode & ios::out)
+	{
+	if (mode & ios::in)
+	    {
+	    dos_mode |= O_RDWR;
+	    }
+	else
+	    {
+	    dos_mode |= O_WRONLY;
+	    }
+	// CONSIDER: a bit weaker  treatment than in spec.
+	if (!(mode & (ios::in|ios::app|ios::ate|ios::noreplace)))
+	    {
+	    mode |= ios::trunc;	// IMPLIED
+	    dos_mode |= O_TRUNC;
+	    }
+	}
+    else if (mode & ios::in)
+	dos_mode |= O_RDONLY;
+    else
+	return NULL;	// error if not ios:in or ios::out
+
+    smode = _SH_DENYNO;	// default for NT
+    share &= (sh_read|sh_write|sh_none); // ignore other bits
+    if (share)	// optimization  openprot serves as default
+	{
+	switch (share)
+	    {
+/*	    case 03000 : Reserved for sh_compat  */
+
+//	    case sh_none : 
+	    case 04000 : 
+		smode = _SH_DENYRW;
+		break;
+//	    case sh_read : 
+	    case 05000 : 
+		smode = _SH_DENYWR;
+		break;
+//	    case sh_write : 
+	    case 06000 : 
+		smode = _SH_DENYRD;
+		break;
+//	    case (sh_read|sh_write) :
+	    case 07000 :
+		smode = _SH_DENYNO;
+		break;
+	    default :	// unrecognized value same as default
+		break;
+	    };
+	}
+
+    x_fd = _sopen(name, dos_mode, smode, S_IREAD|S_IWRITE);
+    if (x_fd==-1)
+	return NULL;
+    lock();
+    x_fOpened = 1;
+    if ((!unbuffered()) && (!ebuf()))
+	{
+        char * sbuf = new char[BUFSIZ];
+	if (!sbuf)
+	    {
+	    unbuffered(1);
+	    }
+	else
+	    {
+	    streambuf::setb(sbuf,sbuf+BUFSIZ,1);
+	    }
+	}
+    if (mode & ios::ate)
+	if (seekoff(0,ios::end,mode)==EOF)
+	    {
+	    close();
+	    unlock();
+	    return NULL;
+	    }
+    unlock();
+    return this;
+}
+
+/***
+*int filebuf::setmode(int mode) - filebuf setmode function
+*
+*Purpose:
+*	filebuf setmode() member function.  Set binary or text access mode.
+*	Calls _setmode().
+*
+*	MS-specific extension.
+*
+*Entry:
+*	mode = filebuf::binary or filebuf::text.
+*
+*Exit:
+*	Returns previous mode, or -1 error.
+*
+*Exceptions:
+*	Return -1 (EOF) if invalid argument or _setmode fails.
+*
+*******************************************************************************/
+int filebuf::setmode(int mode)
+{
+    int retval;
+    if ((mode!=filebuf::binary) && (mode!=filebuf::text))
+	return -1;
+
+    lock();
+    if ((x_fd==-1) || (sync()==EOF))
+	{
+	retval = -1;
+	}
+    else
+	{
+	retval = _setmode(x_fd,mode);
+	}
+
+    unlock();
+    return retval;
+}