1 files changed, 94 insertions, 0 deletions
diff --git a/src/xrstate.c b/src/xrstate.c
new file mode 100644
index 00000000..37c8f501
--- /dev/null
+++ b/src/xrstate.c
@@ -0,0 +1,94 @@
+/*
+ * $XFree86: $
+ *
+ * Copyright © 2002 University of Southern California
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of University
+ * of Southern California not be used in advertising or publicity
+ * pertaining to distribution of the software without specific,
+ * written prior permission.  University of Southern California makes
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ *
+ * UNIVERSITY OF SOUTHERN CALIFORNIA DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL UNIVERSITY OF
+ * SOUTHERN CALIFORNIA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Carl Worth, USC, Information Sciences Institute */
+
+#include <stdlib.h>
+#include "xrint.h"
+
+XrState *
+XrStateCreate(Display *dpy)
+{
+    XrState *xrs;
+
+    xrs = malloc(sizeof(XrState));
+
+    XrStateInit(xrs, dpy);
+
+    return xrs;
+}
+
+void
+XrStateInit(XrState *xrs, Display *dpy)
+{
+    xrs->dpy = dpy;
+    xrs->stack = NULL;
+    XrStatePush(xrs);
+}
+
+void
+XrStateDeinit(XrState *xrs)
+{
+    while (xrs->stack) {
+	XrStatePop(xrs);
+    }
+}
+
+void
+XrStateDestroy(XrState *xrs)
+{
+    XrStateDeinit(xrs);
+    free(xrs);
+}
+
+void
+XrStatePush(XrState *xrs)
+{
+    XrGState *top;
+
+    if (xrs->stack) {
+	top = XrGStateClone(xrs->stack);
+    } else {
+	top = XrGStateCreate(xrs->dpy);
+    }
+
+    top->next = xrs->stack;
+    xrs->stack = top;
+}
+
+void
+XrStatePop(XrState *xrs)
+{
+    XrGState *top;
+
+    if (xrs->stack) {
+	top = xrs->stack;
+	xrs->stack = top->next;
+
+	XrGStateDestroy(top);
+    }
+}
+