1 files changed, 66 insertions, 0 deletions

diff --git a/utils/rbutilqt/mspack/lzss.h b/utils/rbutilqt/mspack/lzss.h
new file mode 100644
index 0000000000..aa946e52ae
--- /dev/null
+++ b/utils/rbutilqt/mspack/lzss.h
@@ -0,0 +1,66 @@
+/* This file is part of libmspack.
+ * (C) 2003-2004 Stuart Caie.
+ *
+ * libmspack is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License (LGPL) version 2.1
+ *
+ * For further details, see the file COPYING.LIB distributed with libmspack
+ */
+
+#ifndef MSPACK_LZSS_H
+#define MSPACK_LZSS_H 1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* LZSS compression / decompression definitions */
+
+#define LZSS_WINDOW_SIZE (4096)
+#define LZSS_WINDOW_FILL (0x20)
+
+#define LZSS_MODE_EXPAND  (0)
+#define LZSS_MODE_MSHELP  (1)
+#define LZSS_MODE_QBASIC  (2)
+
+/**
+ * Decompresses an LZSS stream.
+ *
+ * Input bytes will be read in as necessary using the system->read()
+ * function with the input file handle given. This will continue until
+ * system->read() returns 0 bytes, or an error. Errors will be passed
+ * out of the function as MSPACK_ERR_READ errors. Input streams should
+ * convey an "end of input stream" by refusing to supply all the bytes
+ * that LZSS asks for when they reach the end of the stream, rather
+ * than return an error code.
+ *
+ * Output bytes will be passed to the system->write() function, using
+ * the output file handle given. More than one call may be made to
+ * system->write().
+ *
+ * As EXPAND.EXE (SZDD/KWAJ), Microsoft Help and QBasic have slightly
+ * different encodings for the control byte and matches, a "mode"
+ * parameter is allowed, to choose the encoding.
+ *
+ * @param system             an mspack_system structure used to read from
+ *                           the input stream and write to the output
+ *                           stream, also to allocate and free memory.
+ * @param input              an input stream with the LZSS data.
+ * @param output             an output stream to write the decoded data to.
+ * @param input_buffer_size  the number of bytes to use as an input
+ *                           bitstream buffer.
+ * @param mode               one of #LZSS_MODE_EXPAND, #LZSS_MODE_MSHELP or
+ *                           #LZSS_MODE_QBASIC
+ * @return an error code, or MSPACK_ERR_OK if successful
+ */
+extern int lzss_decompress(struct mspack_system *system,
+                           struct mspack_file *input,
+                           struct mspack_file *output,
+                           int input_buffer_size,
+                           int mode);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif