Imported Upstream version 93u+upstream

1 files changed, 98 insertions, 0 deletions

diff --git a/src/lib/libast/path/pathcat.c b/src/lib/libast/path/pathcat.c
new file mode 100644
index 0000000..2fa9cde
--- /dev/null
+++ b/src/lib/libast/path/pathcat.c
@@ -0,0 +1,98 @@
+/***********************************************************************
+*                                                                      *
+*               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 Bell Laboratories
+ *
+ * single dir support for pathaccess()
+ */
+
+#define _AST_API_H	1
+
+#include <ast.h>
+
+/*
+ * building 3d flirts with the dark side
+ */
+
+#if _BLD_3d
+
+#undef	pathcat
+#define pathcat_20100601	_3d_pathcat
+
+#else
+
+char*
+pathcat(char* path, const char* dirs, int sep, const char* a, const char* b)
+{
+	return pathcat_20100601(dirs, sep, a, b, path, PATH_MAX);
+}
+
+#endif
+
+#undef	_AST_API
+
+#include <ast_api.h>
+
+char*
+pathcat_20100601(register const char* dirs, int sep, const char* a, register const char* b, char* path, size_t size)
+{
+	register char*	s;
+	register char*	e;
+
+	s = path;
+	e = path + size;
+	while (*dirs && *dirs != sep)
+	{
+		if (s >= e)
+			return 0;
+		*s++ = *dirs++;
+	}
+	if (s != path)
+	{
+		if (s >= e)
+			return 0;
+		*s++ = '/';
+	}
+	if (a)
+	{
+		while (*s = *a++)
+			if (++s >= e)
+				return 0;
+		if (b)
+		{
+			if (s >= e)
+				return 0;
+			*s++ = '/';
+		}
+	}
+	else if (!b)
+		b = ".";
+	if (b)
+		do
+		{
+			if (s >= e)
+				return 0;
+		} while (*s++ = *b++);
+	return *dirs ? (char*)++dirs : 0;
+}