增加文件系统

Lib/dhara/bytes.h

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+/* Dhara - NAND flash management layer
+ * Copyright (C) 2013 Daniel Beer <dlbeer@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * 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.
+ */
+
+#ifndef DHARA_BYTES_H_
+#define DHARA_BYTES_H_
+
+#include <stdint.h>
+
+static inline uint16_t dhara_r16(const uint8_t *data)
+{
+    return ((uint16_t)data[0]) |
+           (((uint16_t)data[1]) << 8);
+}
+
+static inline void dhara_w16(uint8_t *data, uint16_t v)
+{
+    data[0] = v;
+    data[1] = v >> 8;
+}
+
+static inline uint32_t dhara_r32(const uint8_t *data)
+{
+    return ((uint32_t)data[0]) |
+           (((uint32_t)data[1]) << 8) |
+           (((uint32_t)data[2]) << 16) |
+           (((uint32_t)data[3]) << 24);
+}
+
+static inline void dhara_w32(uint8_t *data, uint32_t v)
+{
+    data[0] = v;
+    data[1] = v >> 8;
+    data[2] = v >> 16;
+    data[3] = v >> 24;
+}
+
+#endif