1 files changed, 112 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/stack.c b/cddl/contrib/opensolaris/tools/ctf/cvt/stack.c
new file mode 100644
index 0000000..7c36cd5
--- /dev/null
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/stack.c
@@ -0,0 +1,112 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2001 by Sun Microsystems, Inc.
+ * All rights reserved.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * Routines for manipulating stacks
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include "stack.h"
+#include "memory.h"
+
+#define	STACK_SEEDSIZE	5
+
+struct stk {
+	int st_nument;
+	int st_top;
+	void **st_data;
+
+	void (*st_free)(void *);
+};
+
+stk_t *
+stack_new(void (*freep)(void *))
+{
+	stk_t *sp;
+
+	sp = xmalloc(sizeof (stk_t));
+	sp->st_nument = STACK_SEEDSIZE;
+	sp->st_top = -1;
+	sp->st_data = xmalloc(sizeof (void *) * sp->st_nument);
+	sp->st_free = freep;
+
+	return (sp);
+}
+
+void
+stack_free(stk_t *sp)
+{
+	int i;
+
+	if (sp->st_free) {
+		for (i = 0; i <= sp->st_top; i++)
+			sp->st_free(sp->st_data[i]);
+	}
+	free(sp->st_data);
+	free(sp);
+}
+
+void *
+stack_pop(stk_t *sp)
+{
+	assert(sp->st_top >= 0);
+
+	return (sp->st_data[sp->st_top--]);
+}
+
+void *
+stack_peek(stk_t *sp)
+{
+	if (sp->st_top == -1)
+		return (NULL);
+
+	return (sp->st_data[sp->st_top]);
+}
+
+void
+stack_push(stk_t *sp, void *data)
+{
+	sp->st_top++;
+
+	if (sp->st_top == sp->st_nument) {
+		sp->st_nument += STACK_SEEDSIZE;
+		sp->st_data = xrealloc(sp->st_data,
+		    sizeof (void *) * sp->st_nument);
+	}
+
+	sp->st_data[sp->st_top] = data;
+}
+
+int
+stack_level(stk_t *sp)
+{
+	return (sp->st_top + 1);
+}