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diff --git a/usr/src/lib/libast/common/string/swapput.c b/usr/src/lib/libast/common/string/swapput.c
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+/***********************************************************************
+* *
+* This software is part of the ast package *
+* Copyright (c) 1985-2007 AT&T Knowledge Ventures *
+* and is licensed under the *
+* Common Public License, Version 1.0 *
+* by AT&T Knowledge Ventures *
+* *
+* A copy of the License is available at *
+* http://www.opensource.org/licenses/cpl1.0.txt *
+* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
+* *
+* Information and Software Systems Research *
+* AT&T Research *
+* Florham Park NJ *
+* *
+* Glenn Fowler <gsf@research.att.com> *
+* David Korn <dgk@research.att.com> *
+* Phong Vo <kpv@research.att.com> *
+* *
+***********************************************************************/
+#pragma prototyped
+/*
+ * Glenn Fowler
+ * AT&T Research
+ *
+ * internal representation conversion support
+ */
+
+#include <ast.h>
+#include <swap.h>
+
+/*
+ * put v of n chars into b according to op
+ */
+
+void*
+swapput(int op, void* b, int n, intmax_t v)
+{
+ register char* p = (char*)b + n;
+
+ while (p > (char*)b)
+ {
+ *--p = v;
+ v >>= CHAR_BIT;
+ }
+ if (op)
+ swapmem(op, p, p, n);
+ return b;
+}