Move functions to their own files

Also we move the source code to a src/ directory.  We also move from
using `struct luxdisp` to `lux_t` to signify that we don’t want the user
to be messing with the struct members.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/luxget.c b/src/luxget.c
new file mode 100644
index 0000000..39c3b6f
--- /dev/null
+++ b/src/luxget.c
@@ -0,0 +1,39 @@
+/*
+ * BSD Zero Clause License
+ *
+ * Copyright (c) 2022 Thomas Voss
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * 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.
+ */
+
+#include <stdio.h>
+
+#include "common.h"
+#include "lux.h"
+
+int
+luxget(lux_t *disp)
+{
+	/* If we don't have an open stream with the brightness file yet then
+	 * open one.  If we do, we instead rewind to the start of the file so
+	 * that we don't just read an EOF.
+	 */
+	if (disp->__bstream == NULL) {
+		if ((disp->__bstream = getbstream(disp->__dirfd)) == NULL)
+			return -1;
+	} else
+		rewind(disp->__bstream);
+
+	int n;
+	fscanf(disp->__bstream, "%d", &n);
+	return n;
+}