From 3950ffe2a485479f6561c27364d3d7df5a21d124 Mon Sep 17 00:00:00 2001
From: Igor Pashev <pashev.igor@gmail.com>
Date: Sun, 24 Jun 2012 22:28:35 +0000
Subject: Imported Upstream version 93u+

---
 src/lib/libast/string/strtape.c | 148 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 src/lib/libast/string/strtape.c

(limited to 'src/lib/libast/string/strtape.c')

diff --git a/src/lib/libast/string/strtape.c b/src/lib/libast/string/strtape.c
new file mode 100644
index 0000000..e31f227
--- /dev/null
+++ b/src/lib/libast/string/strtape.c
@@ -0,0 +1,148 @@
+/***********************************************************************
+*                                                                      *
+*               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
+/*
+ * local device pathname for portable tape unit specification is returned
+ * if e is non-null then it is set to the next unused char in s
+ *
+ *	<unit><density>[<no-rewind>]
+ *	{0-7}[l,m,h,u,c][n]
+ */
+
+#include <ast.h>
+
+char*
+strtape(register const char* s, register char** e)
+{
+	int		mtunit = '0';
+	int		mtdensity = 0;
+	char		mtrewind[2];
+	char		mtbehavior[2];
+
+	static char	tapefile[sizeof("/dev/Xrmt/123456789")];
+
+	mtrewind[0] = mtrewind[1] = mtbehavior[0] = mtbehavior[1] = 0;
+	for (;;)
+	{
+		switch (*s)
+		{
+		case '0':
+		case '1':
+		case '2':
+		case '3':
+		case '4':
+		case '5':
+		case '6':
+		case '7':
+			mtunit = *s++;
+			continue;
+		case 'b':
+		case 'v':
+			mtbehavior[0] = *s++;
+			continue;
+		case 'l':
+		case 'm':
+		case 'h':
+		case 'u':
+		case 'c':
+			mtdensity = *s++;
+			continue;
+		case 'n':
+			mtrewind[0] = *s++;
+			continue;
+		}
+		break;
+	}
+	if (e) *e = (char*)s;
+	if (!access("/dev/rmt/.", F_OK))
+	{
+		/*
+		 * system V
+		 */
+
+		if (!mtdensity) mtdensity = 'm';
+		sfsprintf(tapefile, sizeof(tapefile), "/dev/rmt/ctape%c%s", mtunit, mtrewind);
+		if (!access(tapefile, F_OK)) return(tapefile);
+		for (;;)
+		{
+			sfsprintf(tapefile, sizeof(tapefile), "/dev/rmt/%c%c%s%s", mtunit, mtdensity, mtbehavior, mtrewind);
+			if (!access(tapefile, F_OK)) return(tapefile);
+			if (!mtbehavior[0]) break;
+			mtbehavior[0] = 0;
+		}
+	}
+	else if (!access("/dev/nst0", F_OK))
+	{
+		/*
+		 * linux
+		 */
+
+		sfsprintf(tapefile, sizeof(tapefile), "/dev/%sst%c", mtrewind, mtunit);
+	}
+	else if (!access("/dev/nrmt0", F_OK))
+	{
+		/*
+		 * 9th edition
+		 */
+
+		switch (mtdensity)
+		{
+		case 'l':
+			mtunit = '0';
+			break;
+		case 'm':
+			mtunit = '1';
+			break;
+		case 'h':
+			mtunit = '2';
+			break;
+		}
+		sfsprintf(tapefile, sizeof(tapefile), "/dev/%srmt%c", mtrewind, mtunit);
+	}
+	else
+	{
+		/*
+		 * BSD
+		 */
+
+		mtunit -= '0';
+		switch (mtdensity)
+		{
+		case 'l':
+			break;
+		case 'h':
+			mtunit |= 020;
+			break;
+		default:
+			mtunit |= 010;
+			break;
+		}
+		switch (mtrewind[0])
+		{
+		case 'n':
+			mtunit |= 040;
+			break;
+		}
+		sfsprintf(tapefile, sizeof(tapefile), "/dev/rmt%d", mtunit);
+	}
+	return(tapefile);
+}
-- 
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