1 files changed, 66 insertions, 0 deletions
diff --git a/contrib/global/lib/defined.c b/contrib/global/lib/defined.c
new file mode 100644
index 000000000000..1e72b46c05dd
--- /dev/null
+++ b/contrib/global/lib/defined.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 1996, 1997, 1998 Shigio Yamaguchi. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Shigio Yamaguchi.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	defined.c				12-Nov-98
+ *
+ */
+#include <stdlib.h>
+
+#include "die.h"
+#include "dbop.h"
+#include "defined.h"
+#include "makepath.h"
+
+static DBOP	*dbop = NULL;
+
+/*
+ * Tag command that supports referenced tag must call this function
+ * to decide whether or not the tag is defined.
+ */
+int
+defined(name)
+const char *name;
+{
+	if (dbop == NULL) {
+		const char *dbpath;
+
+		/*
+		 * gtags(1) set GTAGSDBPATH to the path GTAGS exist.
+		 */
+		if (!(dbpath = getenv("GTAGSDBPATH")))
+			dbpath = ".";
+		dbop = dbop_open(makepath(dbpath, "GTAGS"), 0, 0, 0);
+		if (dbop == NULL)
+			die1("GTAGS not found. (%s)", makepath(dbpath, "GTAGS"));
+	}
+	if (dbop_get(dbop, name))
+		return 1;
+	return 0;
+}