1 files changed, 109 insertions, 0 deletions
diff --git a/lib/libdpv/status.c b/lib/libdpv/status.c
new file mode 100644
index 000000000000..de2bdc45fdd2
--- /dev/null
+++ b/lib/libdpv/status.c
@@ -0,0 +1,109 @@
+/*-
+ * Copyright (c) 2013-2014 Devin Teske <dteske@FreeBSD.org>
+ * 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.
+ * 
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+#include <curses.h>
+#include <dialog.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "dialog_util.h"
+#include "status.h"
+
+/* static globals */
+static char *status_buf = NULL;
+static int status_bufsize = -1;
+static int status_row;
+static int status_width;
+
+/*
+ * Print a `one-liner' status message at the bottom of the screen. Messages are
+ * trimmed to fit within the console length (ANSI coloring not accounted for).
+ */
+void
+status_printf(const char *fmt, ...)
+{
+	int n, attrs;
+	chtype color = dlg_color_pair(dlg_color_table[BUTTON_ACTIVE_ATTR].fg,
+	    dlg_color_table[SCREEN_ATTR].bg) | A_BOLD;
+	va_list args;
+
+	status_row = tty_maxrows() - 1;
+	status_width = tty_maxcols();
+
+	/* NULL is a special convention meaning "erase the old stuff" */
+	if (fmt == NULL) {
+		move(status_row, 0);
+		clrtoeol();
+		return;
+	}
+
+	/* Resize buffer if terminal width is greater */
+	if ((status_width + 1) > status_bufsize) {
+		status_buf = realloc(status_buf, status_width + 1);
+		if (status_buf == NULL) {
+			status_bufsize = -1;
+			return;
+		}
+		status_bufsize = status_width + 1;
+	}
+
+	/* Print the message within a space-filled buffer */
+	memset(status_buf, ' ', status_width);
+	va_start(args, fmt);
+	n = vsnprintf(status_buf, status_width + 1, fmt, args);
+	va_end(args);
+
+	/* If vsnprintf(3) produced less bytes than the maximum, change the
+	 * implicitly-added NUL-terminator into a space and terminate at max */
+	if (n < status_width) {
+		status_buf[n] = ' ';
+		status_buf[status_width] = '\0';
+	}
+
+	/* Print text in screen bg, button active fg, and bold */
+	attrs = getattrs(stdscr);
+	attrset(color);
+	mvaddstr(status_row, 0, status_buf);
+	attrset(attrs);
+
+	/* Seat the cursor over the last character at absolute lower-right */
+	move(status_row, status_width - 1);
+	refresh();
+}
+
+/*
+ * Free allocated items initialized by status_printf()
+ */
+void
+status_free(void)
+{
+	if (status_buf != NULL) {
+		free(status_buf);
+		status_buf = NULL;
+	}
+}