Imported to git.

1 files changed, 142 insertions, 0 deletions

diff --git a/src/liblzma/api/lzma/stream_flags.h b/src/liblzma/api/lzma/stream_flags.h
new file mode 100644
index 00000000..070c91c9
--- /dev/null
+++ b/src/liblzma/api/lzma/stream_flags.h
@@ -0,0 +1,142 @@
+/**
+ * \file        lzma/stream_flags.h
+ * \brief       .lzma Stream Header and Stream tail encoder and decoder
+ *
+ * \author      Copyright (C) 1999-2006 Igor Pavlov
+ * \author      Copyright (C) 2007 Lasse Collin
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#ifndef LZMA_H_INTERNAL
+#	error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief       Size of Stream Header
+ *
+ * Magic Bytes (6) + Stream Flags (1) + CRC32 (4)
+ */
+#define LZMA_STREAM_HEADER_SIZE (6 + 1 + 4)
+
+
+/**
+ * \brief       Size of Stream tail
+ *
+ * Because Stream Footer already has a defined meaning in the file format
+ * specification, we use Stream tail to denote these two fields:
+ * Stream Flags (1) + Magic Bytes (2)
+ */
+#define LZMA_STREAM_TAIL_SIZE (1 + 2)
+
+
+/**
+ * Options for encoding and decoding Stream Header and Stream tail
+ */
+typedef struct {
+	/**
+	 * Type of the Check calculated from uncompressed data
+	 */
+	lzma_check_type check;
+
+	/**
+	 * True if Block Headers have the CRC32 field. Note that the CRC32
+	 * field is always present in the Stream Header.
+	 */
+	lzma_bool has_crc32;
+
+	/**
+	 * True if the Stream is a Multi-Block Stream.
+	 */
+	lzma_bool is_multi;
+
+} lzma_stream_flags;
+
+
+#define lzma_stream_flags_is_equal(a, b) \
+	((a).check == (b).check \
+		&& (a).has_crc32 == (b).has_crc32 \
+		&& (a).is_multi == (b).is_multi)
+
+
+/**
+ * \brief       Encodes Stream Header
+ *
+ * Encoding of the Stream Header is done with a single call instead of
+ * first initializing and then doing the actual work with lzma_code().
+ *
+ * \param       out         Beginning of the output buffer
+ * \param       out_pos     out[*out_pos] is the next write position. This
+ *                          is updated by the encoder.
+ * \param       out_size    out[out_size] is the first byte to not write.
+ * \param       options     Stream Header options to be encoded.
+ *
+ * \return      - LZMA_OK: Encoding was successful.
+ *              - LZMA_PROG_ERROR: Invalid options.
+ *              - LZMA_BUF_ERROR: Not enough output buffer space.
+ */
+extern lzma_ret lzma_stream_header_encode(
+		uint8_t *out, const lzma_stream_flags *options);
+
+
+/**
+ * \brief       Encodes Stream tail
+ *
+ * \param       footer      Pointer to a pointer that will hold the
+ *                          allocated buffer. Caller must free it once
+ *                          it isn't needed anymore.
+ * \param       footer_size Pointer to a variable that will the final size
+ *                          of the footer buffer.
+ * \param       allocator   lzma_allocator for custom allocator functions.
+ *                          Set to NULL to use malloc().
+ * \param       options     Stream Header options to be encoded.
+ *
+ * \return      - LZMA_OK: Success; *header and *header_size set.
+ *              - LZMA_PROG_ERROR: *options is invalid.
+ *              - LZMA_MEM_ERROR: Cannot allocate memory.
+ */
+extern lzma_ret lzma_stream_tail_encode(
+		uint8_t *out, const lzma_stream_flags *options);
+
+
+/**
+ * \brief       Initializes Stream Header decoder
+ *
+ * \param       strm        Pointer to lzma_stream used to pass input data
+ * \param       options     Target structure for parsed results
+ *
+ * \return      - LZMA_OK: Successfully initialized
+ *              - LZMA_MEM_ERROR: Cannot allocate memory
+ *
+ * The actual decoding is done with lzma_code() and freed with lzma_end().
+ */
+extern lzma_ret lzma_stream_header_decoder(
+		lzma_stream *strm, lzma_stream_flags *options);
+
+
+/**
+ * \brief       Initializes Stream tail decoder
+ *
+ * \param       strm        Pointer to lzma_stream used to pass input data
+ * \param       options     Target structure for parsed results.
+ * \param       decode_uncompressed_size
+ *                          Set to true if the first field to decode is
+ *                          Uncompressed Size. Set to false if the first
+ *                          field to decode is Backward Size.
+ *
+ * \return      - LZMA_OK: Successfully initialized
+ *              - LZMA_MEM_ERROR: Cannot allocate memory
+ *
+ * The actual decoding is done with lzma_code() and freed with lzma_end().
+ */
+extern lzma_ret lzma_stream_tail_decoder(
+		lzma_stream *strm, lzma_stream_flags *options);