Updated rasm to 1.7

1 files changed, 189 insertions, 0 deletions

diff --git a/tools/rasm/lzsa-master/src/frame.c b/tools/rasm/lzsa-master/src/frame.c
new file mode 100644
index 0000000..f1d6be2
--- /dev/null
+++ b/tools/rasm/lzsa-master/src/frame.c
@@ -0,0 +1,189 @@
+/*

+ * frame.c - frame implementation

+ *

+ * Copyright (C) 2019 Emmanuel Marty

+ *

+ * This software is provided 'as-is', without any express or implied

+ * warranty.  In no event will the authors be held liable for any damages

+ * arising from the use of this software.

+ *

+ * Permission is granted to anyone to use this software for any purpose,

+ * including commercial applications, and to alter it and redistribute it

+ * freely, subject to the following restrictions:

+ *

+ * 1. The origin of this software must not be misrepresented; you must not

+ *    claim that you wrote the original software. If you use this software

+ *    in a product, an acknowledgment in the product documentation would be

+ *    appreciated but is not required.

+ * 2. Altered source versions must be plainly marked as such, and must not be

+ *    misrepresented as being the original software.

+ * 3. This notice may not be removed or altered from any source distribution.

+ */

+

+/*

+ * Uses the libdivsufsort library Copyright (c) 2003-2008 Yuta Mori

+ *

+ * Inspired by LZ4 by Yann Collet. https://github.com/lz4/lz4

+ * With help, ideas, optimizations and speed measurements by spke <zxintrospec@gmail.com>

+ * With ideas from Lizard by Przemyslaw Skibinski and Yann Collet. https://github.com/inikep/lizard

+ * Also with ideas from smallz4 by Stephan Brumme. https://create.stephan-brumme.com/smallz4/

+ *

+ */

+

+#include <stdlib.h>

+#include <string.h>

+#include "frame.h"

+

+#define LZSA_ID_0   0x7b

+#define LZSA_ID_1   0x9e

+

+/**

+ * Get compressed file header size

+ *

+ * @return file header size

+ */

+int lzsa_get_header_size(void) {

+   return 3;

+}

+

+/**

+ * Get compressed frame header size

+ *

+ * @return frame header size

+ */

+int lzsa_get_frame_size(void) {

+   return 3;

+}

+

+/**

+ * Encode file header

+ *

+ * @param pFrameData encoding buffer

+ * @param nMaxFrameDataSize max encoding buffer size, in bytes

+ *

+ * @return number of encoded bytes, or -1 for failure

+ */

+int lzsa_encode_header(unsigned char *pFrameData, const int nMaxFrameDataSize, int nFormatVersion) {

+   if (nMaxFrameDataSize >= 3 && (nFormatVersion == 1 || nFormatVersion == 2)) {

+      pFrameData[0] = LZSA_ID_0;                         /* Magic number */

+      pFrameData[1] = LZSA_ID_1;

+      pFrameData[2] = (nFormatVersion == 2) ? 0x20 : 0;  /* Format version 1 */

+

+      return 3;

+   }

+   else {

+      return -1;

+   }

+}

+

+/**

+ * Encode compressed block frame header

+ *

+ * @param pFrameData encoding buffer

+ * @param nMaxFrameDataSize max encoding buffer size, in bytes

+ * @param nBlockDataSize compressed block's data size, in bytes

+ *

+ * @return number of encoded bytes, or -1 for failure

+ */

+int lzsa_encode_compressed_block_frame(unsigned char *pFrameData, const int nMaxFrameDataSize, const int nBlockDataSize) {

+   if (nMaxFrameDataSize >= 3 && nBlockDataSize <= 0x7fffff) {

+      pFrameData[0] = nBlockDataSize & 0xff;

+      pFrameData[1] = (nBlockDataSize >> 8) & 0xff;

+      pFrameData[2] = (nBlockDataSize >> 16) & 0x7f;

+

+      return 3;

+   }

+   else {

+      return -1;

+   }

+}

+

+/**

+ * Encode uncompressed block frame header

+ *

+ * @param pFrameData encoding buffer

+ * @param nMaxFrameDataSize max encoding buffer size, in bytes

+ * @param nBlockDataSize uncompressed block's data size, in bytes

+ *

+ * @return number of encoded bytes, or -1 for failure

+ */

+int lzsa_encode_uncompressed_block_frame(unsigned char *pFrameData, const int nMaxFrameDataSize, const int nBlockDataSize) {

+   if (nMaxFrameDataSize >= 3 && nBlockDataSize <= 0x7fffff) {

+      pFrameData[0] = nBlockDataSize & 0xff;

+      pFrameData[1] = (nBlockDataSize >> 8) & 0xff;

+      pFrameData[2] = ((nBlockDataSize >> 16) & 0x7f) | 0x80;   /* Uncompressed block */

+

+      return 3;

+   }

+   else {

+      return -1;

+   }

+}

+

+/**

+ * Encode terminal frame header

+ *

+ * @param pFrameData encoding buffer

+ * @param nMaxFrameDataSize max encoding buffer size, in bytes

+ *

+ * @return number of encoded bytes, or -1 for failure

+ */

+int lzsa_encode_footer_frame(unsigned char *pFrameData, const int nMaxFrameDataSize) {

+   if (nMaxFrameDataSize >= 3) {

+      pFrameData[0] = 0x00;         /* EOD frame */

+      pFrameData[1] = 0x00;

+      pFrameData[2] = 0x00;

+

+      return 3;

+   }

+   else {

+      return -1;

+   }

+}

+

+/**

+ * Decode file header

+ *

+ * @param pFrameData data bytes

+ * @param nFrameDataSize number of bytes to decode

+ *

+ * @return 0 for success, or -1 for failure

+ */

+int lzsa_decode_header(const unsigned char *pFrameData, const int nFrameDataSize, int *nFormatVersion) {

+   if (nFrameDataSize != 3 ||

+      pFrameData[0] != LZSA_ID_0 ||

+      pFrameData[1] != LZSA_ID_1 ||

+      (pFrameData[2] & 0x1f) != 0 ||

+      ((pFrameData[2] & 0xe0) != 0x00 && (pFrameData[2] & 0xe0) != 0x20)) {

+      return -1;

+   }

+   else {

+      *nFormatVersion = (pFrameData[2] & 0xe0) ? 2 : 1;

+      return 0;

+   }

+}

+

+/**

+ * Decode frame header

+ *

+ * @param pFrameData data bytes

+ * @param nFrameDataSize number of bytes to decode

+ * @param nBlockSize pointer to block size, updated if this function succeeds (set to 0 if this is the terminal frame)

+ * @param nIsUncompressed pointer to compressed block flag, updated if this function succeeds

+ *

+ * @return 0 for success, or -1 for failure

+ */

+int lzsa_decode_frame(const unsigned char *pFrameData, const int nFrameDataSize, unsigned int *nBlockSize, int *nIsUncompressed) {

+   if (nFrameDataSize == 3) {

+      *nBlockSize = ((unsigned int)pFrameData[0]) |

+         (((unsigned int)pFrameData[1]) << 8) |

+         (((unsigned int)pFrameData[2]) << 16);

+

+      *nIsUncompressed = ((*nBlockSize & 0x800000) != 0) ? 1 : 0;

+      *nBlockSize &= 0x7fffff;

+      return 0;

+   }

+   else {

+      return -1;

+   }

+}