Imported Upstream version 93u+upstream

1 files changed, 57 insertions, 0 deletions

diff --git a/src/lib/libast/string/swapget.c b/src/lib/libast/string/swapget.c
new file mode 100644
index 0000000..b032bfc
--- /dev/null
+++ b/src/lib/libast/string/swapget.c
@@ -0,0 +1,57 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              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>
+
+/*
+ * get int_n from b according to op
+ */
+
+intmax_t
+swapget(int op, const void* b, int n)
+{
+	register unsigned char*	p;
+	register unsigned char*	d;
+	intmax_t		v;
+	unsigned char		tmp[sizeof(intmax_t)];
+
+	if (n > sizeof(intmax_t))
+		n = sizeof(intmax_t);
+	if (op) swapmem(op, b, d = tmp, n);
+	else d = (unsigned char*)b;
+	p = d + n;
+	v = 0;
+	while (d < p)
+	{
+		v <<= CHAR_BIT;
+		v |= *d++;
+	}
+	return v;
+}