Imported Upstream version 93u+upstream

1 files changed, 94 insertions, 0 deletions

diff --git a/src/lib/libast/string/fmtscale.c b/src/lib/libast/string/fmtscale.c
new file mode 100644
index 0000000..5a35577
--- /dev/null
+++ b/src/lib/libast/string/fmtscale.c
@@ -0,0 +1,94 @@
+/***********************************************************************
+*                                                                      *
+*               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
+ *
+ * return number n scaled to metric multiples of k { 1000 1024 }
+ * return string length is at most 5 chars + terminating nul
+ */
+
+#include <ast.h>
+#include <lclib.h>
+
+char*
+fmtscale(register Sfulong_t n, int k)
+{
+	register Sfulong_t	m;
+	int			r;
+	int			z;
+	const char*		u;
+	char			suf[3];
+	char*			s;
+	char*			buf;
+	Lc_numeric_t*		p = (Lc_numeric_t*)LCINFO(AST_LC_NUMERIC)->data;
+
+	static const char	scale[] = "bkMGTPE";
+
+	u = scale;
+	if (n < 1000)
+		r = 0;
+	else
+	{
+		m = 0;
+		while (n >= k && *(u + 1))
+		{
+			m = n;
+			n /= k;
+			u++;
+		}
+		if ((r = (10 * (m % k) + (k / 2)) / k) > 9)
+		{
+			r = 0;
+			n++;
+		}
+		if (k == 1024 && n >= 1000)
+		{
+			n = 1;
+			r = 0;
+			u++;
+		}
+	}
+	buf = fmtbuf(z = 8);
+	s = suf;
+	if (u > scale)
+	{
+		if (k == 1024)
+		{
+			*s++ = *u == 'k' ? 'K' : *u;
+			*s++ = 'i';
+		}
+		else
+			*s++ = *u;
+	}
+	*s = 0;
+	if (n > 0 && n < 10)
+		sfsprintf(buf, z, "%I*u%c%d%s", sizeof(n), n, p->decimal >= 0 ? p->decimal : '.', r, suf);
+	else
+	{
+		if (r >= 5)
+			n++;
+		sfsprintf(buf, z, "%I*u%s", sizeof(n), n, suf);
+	}
+	return buf;
+}