From a68a98df480df5c43127fbc632cc22f225dd71cd Mon Sep 17 00:00:00 2001
From: Matthias Kruk <m@m10k.eu>
Date: Sun, 2 May 2021 09:51:26 +0900
Subject: [PATCH] monitor: Add data type for monitor management

To keep track of connected monitors, a data type is necessary.
This commit adds the monitor datatype that is used to keep track
of the size and position of a monitor.
---
 monitor.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 monitor.h |  16 +++++++++
 2 files changed, 117 insertions(+)
 create mode 100644 monitor.c
 create mode 100644 monitor.h

diff --git a/monitor.c b/monitor.c
new file mode 100644
index 0000000..9a618fc
--- /dev/null
+++ b/monitor.c
@@ -0,0 +1,101 @@
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "monitor.h"
+
+struct monitor {
+	int id;
+	int x;
+	int y;
+	int w;
+	int h;
+};
+
+int monitor_new(int id, int x, int y, int w, int h,
+		struct monitor **monitor)
+{
+	struct monitor *mon;
+
+	if(!monitor) {
+		return(-EINVAL);
+	}
+
+	mon = malloc(sizeof(*mon));
+
+	if(!mon) {
+		return(-ENOMEM);
+	}
+
+	mon->id = id;
+	mon->x = x;
+	mon->y = y;
+	mon->w = w;
+	mon->h = h;
+
+	*monitor = mon;
+
+	return(0);
+}
+
+int monitor_free(struct monitor **monitor)
+{
+	if(!monitor) {
+		return(-EINVAL);
+	}
+
+	if(!*monitor) {
+		return(-EALREADY);
+	}
+
+	free(*monitor);
+	*monitor = NULL;
+
+	return(0);
+}
+
+int monitor_get_id(struct monitor *monitor)
+{
+	if(!monitor) {
+		return(-EINVAL);
+	}
+
+	return(monitor->id);
+}
+
+int monitor_get_geometry(struct monitor *monitor,
+			 int *x, int *y, int *w, int *h)
+{
+	if(!monitor) {
+		return(-EINVAL);
+	}
+
+	if(x) {
+		*x = monitor->x;
+	}
+	if(y) {
+		*y = monitor->y;
+	}
+	if(w) {
+		*w = monitor->w;
+	}
+	if(h) {
+		*h = monitor->h;
+	}
+
+	return(0);
+}
+
+int monitor_set_geometry(struct monitor *monitor,
+			 int x, int y, int w, int h)
+{
+	if(!monitor) {
+		return(-EINVAL);
+	}
+
+	monitor->x = x;
+	monitor->y = y;
+	monitor->w = w;
+	monitor->h = h;
+
+	return(0);
+}
diff --git a/monitor.h b/monitor.h
new file mode 100644
index 0000000..04f32bd
--- /dev/null
+++ b/monitor.h
@@ -0,0 +1,16 @@
+#ifndef MONITOR_H
+#define MONITOR_H 1
+
+struct monitor;
+
+int monitor_new(int id, int x, int y, int w, int h,
+		struct monitor **monitor);
+int monitor_free(struct monitor **monitor);
+
+int monitor_get_id(struct monitor *monitor);
+int monitor_get_geometry(struct monitor *monitor,
+			 int *x, int *y, int *w, int *h);
+int monitor_set_geometry(struct monitor *monitor,
+			 int x, int y, int w, int h);
+
+#endif /* MONITOR_H */
-- 
2.47.3