Add LZO1X algorithm to the kernel

[linux-2.6-microblaze.git] / include / linux / lzo.h

diff --git a/include/linux/lzo.h b/include/linux/lzo.h
new file mode 100644 (file)
index 0000000..582d8b7
--- /dev/null
+++ b/include/linux/lzo.h
@@ -0,0 +1,44 @@
+#ifndef __LZO_H__
+#define __LZO_H__
+/*
+ *  LZO Public Kernel Interface
+ *  A mini subset of the LZO real-time data compression library
+ *
+ *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ *
+ *  The full LZO package can be found at:
+ *  http://www.oberhumer.com/opensource/lzo/
+ *
+ *  Changed for kernel use by:
+ *  Nitin Gupta <nitingupta910@gmail.com>
+ *  Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#define LZO1X_MEM_COMPRESS     (16384 * sizeof(unsigned char *))
+#define LZO1X_1_MEM_COMPRESS   LZO1X_MEM_COMPRESS
+
+#define lzo1x_worst_compress(x) (x + (x / 64) + 16 + 3)
+
+/* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */
+int lzo1x_1_compress(const unsigned char *src, size_t src_len,
+                       unsigned char *dst, size_t *dst_len, void *wrkmem);
+
+/* safe decompression with overrun testing */
+int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
+                       unsigned char *dst, size_t *dst_len);
+
+/*
+ * Return values (< 0 = Error)
+ */
+#define LZO_E_OK                       0
+#define LZO_E_ERROR                    (-1)
+#define LZO_E_OUT_OF_MEMORY            (-2)
+#define LZO_E_NOT_COMPRESSIBLE         (-3)
+#define LZO_E_INPUT_OVERRUN            (-4)
+#define LZO_E_OUTPUT_OVERRUN           (-5)
+#define LZO_E_LOOKBEHIND_OVERRUN       (-6)
+#define LZO_E_EOF_NOT_FOUND            (-7)
+#define LZO_E_INPUT_NOT_CONSUMED       (-8)
+#define LZO_E_NOT_YET_IMPLEMENTED      (-9)
+
+#endif