1 files changed, 72 insertions, 0 deletions

diff --git a/private/crt32/stdio/_freebuf.c b/private/crt32/stdio/_freebuf.c
new file mode 100644
index 000000000..fc4f26c0f
--- /dev/null
+++ b/private/crt32/stdio/_freebuf.c
@@ -0,0 +1,72 @@
+/***
+*_freebuf.c - release a buffer from a stream
+*
+*	Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
+*
+*Purpose:
+*	defines _freebuf() - release a buffer from a stream
+*
+*Revision History:
+*	09-19-83  RN	initial version
+*	02-15-90  GJF	Fixed copyright, alignment.
+*	03-16-90  GJF	Replaced cdecl _LOAD_DS with _CALLTYPE1, added #include
+*			<cruntime.h> and removed #include <register.h>.
+*	07-23-90  SBM	Replaced <assertm.h> by <assert.h>
+*	10-03-90  GJF	New-style function declarator.
+*	02-14-92  GJF	Replaced _nfile with _nhandle for Win32.
+*
+*******************************************************************************/
+
+#include <cruntime.h>
+#include <stdio.h>
+#include <file2.h>
+#include <assert.h>
+#include <internal.h>
+#include <stdlib.h>
+
+/***
+*void _freebuf(stream) - release a buffer from a stream
+*
+*Purpose:
+*	free a buffer if at all possible. free() the space if malloc'd by me.
+*	forget about trying to free a user's buffer for him; it may be static
+*	memory (not from malloc), so he has to take care of it. this function
+*	is not intended for use outside the library.
+*
+#ifdef MTHREAD
+*	Multi-thread notes:
+*	_freebuf() does NOT get the stream lock; it is assumed that the
+*	caller has already done this.
+#endif
+*
+*Entry:
+*	FILE *stream - stream to free bufer on
+*
+*Exit:
+*	Buffer may be freed.
+*	No return value.
+*
+*Exceptions:
+*
+*******************************************************************************/
+
+void _CALLTYPE1 _freebuf (
+	REG1 FILE *stream
+	)
+{
+	assert(stream != NULL);
+#ifdef	_WIN32_
+	assert( (unsigned)(stream->_file) < (unsigned)_nhandle );
+#else
+	assert(stream->_file >= 0);
+	assert(stream->_file < _nfile);
+#endif
+
+	if (inuse(stream) && mbuf(stream))
+	{
+		free(stream->_base);
+		stream->_flag &= ~_IOMYBUF;
+		stream->_base = stream->_ptr = NULL;
+		stream->_cnt = 0;
+	}
+}