From c13c9806f957ebc675462737f4b328d3ab89e028 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Mon, 10 Jul 2023 17:29:22 +0800
Subject: [PATCH] update gpsd.c
---
gpsd/booster/ringbuf.h | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/gpsd/booster/ringbuf.h b/gpsd/booster/ringbuf.h
new file mode 100644
index 0000000..23553cc
--- /dev/null
+++ b/gpsd/booster/ringbuf.h
@@ -0,0 +1,57 @@
+/********************************************************************************
+ * Copyright: (C) 2021 LingYun IoT System Studio
+ * All rights reserved.
+ *
+ * Filename: ringbuf.h
+ * Description: This head file
+ *
+ * Version: 1.0.0(2021年04月29日)
+ * Author: Guo Wenxue <guowenxue@gmail.com>
+ * ChangeLog: 1, Release initial version on "2021年04月29日 12时18分32秒"
+ *
+ ********************************************************************************/
+
+#ifndef _RINGBUF_H_
+#define _RINGBUF_H_
+
+struct ring_buffer
+{
+ unsigned char *buffer;
+ int wr_pointer;
+ int rd_pointer;
+ int size;
+};
+
+
+/* Initial the ring buffer */
+void rb_init (struct ring_buffer *ring, unsigned char *buff, int size) ;
+
+
+/* Description: Write $len bytes data in $buf into ring buffer $rb
+ * Return Value: The actual written into ring buffer data size, if ring buffer
+ * left space size small than $len, then only part of the data be written into.
+ */
+int rb_write (struct ring_buffer *rb, unsigned char *buf, int len) ;
+
+
+/* Get ring buffer left free size */
+int rb_free_size (struct ring_buffer *rb);
+
+
+/* Read $max bytes data from ring buffer $rb to $buf */
+int rb_read (struct ring_buffer *rb, unsigned char *buf, int max);
+
+
+/* Read a specify $index byte data in ring buffer $rb */
+unsigned char rb_peek(struct ring_buffer *rb, int index);
+
+
+/* Get data size in the ring buffer */
+int rb_data_size (struct ring_buffer *rb);
+
+
+/* Clear the ring buffer data */
+void rb_clear (struct ring_buffer *rb) ;
+
+#endif /* ----- #ifndef _RINGBUF_H_ ----- */
+
--
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