New upstream version 2.2.4.4

1 files changed, 614 insertions, 601 deletions

diff --git a/lib/qt-tar-xz/xz_dec_stream.c b/lib/qt-tar-xz/xz_dec_stream.c
index bdcbf1b..d240348 100644
--- a/lib/qt-tar-xz/xz_dec_stream.c
+++ b/lib/qt-tar-xz/xz_dec_stream.c
@@ -12,139 +12,139 @@
 
 /* Hash used to validate the Index field */
 struct xz_dec_hash {
-	vli_type unpadded;
-	vli_type uncompressed;
-	uint32_t crc32;
+    vli_type unpadded;
+    vli_type uncompressed;
+    uint32_t crc32;
 };
 
 struct xz_dec {
-	/* Position in dec_main() */
-	enum {
-		SEQ_STREAM_HEADER,
-		SEQ_BLOCK_START,
-		SEQ_BLOCK_HEADER,
-		SEQ_BLOCK_UNCOMPRESS,
-		SEQ_BLOCK_PADDING,
-		SEQ_BLOCK_CHECK,
-		SEQ_INDEX,
-		SEQ_INDEX_PADDING,
-		SEQ_INDEX_CRC32,
-		SEQ_STREAM_FOOTER
-	} sequence;
-
-	/* Position in variable-length integers and Check fields */
-	uint32_t pos;
-
-	/* Variable-length integer decoded by dec_vli() */
-	vli_type vli;
-
-	/* Saved in_pos and out_pos */
-	size_t in_start;
-	size_t out_start;
-
-	/* CRC32 value in Block or Index */
-	uint32_t crc32;
-
-	/* Type of the integrity check calculated from uncompressed data */
-	enum xz_check check_type;
-
-	/* Operation mode */
-	enum xz_mode mode;
-
-	/*
-	 * True if the next call to xz_dec_run() is allowed to return
-	 * XZ_BUF_ERROR.
-	 */
-	bool allow_buf_error;
-
-	/* Information stored in Block Header */
-	struct {
-		/*
-		 * Value stored in the Compressed Size field, or
-		 * VLI_UNKNOWN if Compressed Size is not present.
-		 */
-		vli_type compressed;
-
-		/*
-		 * Value stored in the Uncompressed Size field, or
-		 * VLI_UNKNOWN if Uncompressed Size is not present.
-		 */
-		vli_type uncompressed;
-
-		/* Size of the Block Header field */
-		uint32_t size;
-	} block_header;
-
-	/* Information collected when decoding Blocks */
-	struct {
-		/* Observed compressed size of the current Block */
-		vli_type compressed;
-
-		/* Observed uncompressed size of the current Block */
-		vli_type uncompressed;
-
-		/* Number of Blocks decoded so far */
-		vli_type count;
-
-		/*
-		 * Hash calculated from the Block sizes. This is used to
-		 * validate the Index field.
-		 */
-		struct xz_dec_hash hash;
-	} block;
-
-	/* Variables needed when verifying the Index field */
-	struct {
-		/* Position in dec_index() */
-		enum {
-			SEQ_INDEX_COUNT,
-			SEQ_INDEX_UNPADDED,
-			SEQ_INDEX_UNCOMPRESSED
-		} sequence;
-
-		/* Size of the Index in bytes */
-		vli_type size;
-
-		/* Number of Records (matches block.count in valid files) */
-		vli_type count;
-
-		/*
-		 * Hash calculated from the Records (matches block.hash in
-		 * valid files).
-		 */
-		struct xz_dec_hash hash;
-	} index;
-
-	/*
-	 * Temporary buffer needed to hold Stream Header, Block Header,
-	 * and Stream Footer. The Block Header is the biggest (1 KiB)
-	 * so we reserve space according to that. buf[] has to be aligned
-	 * to a multiple of four bytes; the size_t variables before it
-	 * should guarantee this.
-	 */
-	struct {
-		size_t pos;
-		size_t size;
-		uint8_t buf[1024];
-	} temp;
-
-	struct xz_dec_lzma2 *lzma2;
+    /* Position in dec_main() */
+    enum {
+        SEQ_STREAM_HEADER,
+        SEQ_BLOCK_START,
+        SEQ_BLOCK_HEADER,
+        SEQ_BLOCK_UNCOMPRESS,
+        SEQ_BLOCK_PADDING,
+        SEQ_BLOCK_CHECK,
+        SEQ_INDEX,
+        SEQ_INDEX_PADDING,
+        SEQ_INDEX_CRC32,
+        SEQ_STREAM_FOOTER
+    } sequence;
+
+    /* Position in variable-length integers and Check fields */
+    uint32_t pos;
+
+    /* Variable-length integer decoded by dec_vli() */
+    vli_type vli;
+
+    /* Saved in_pos and out_pos */
+    size_t in_start;
+    size_t out_start;
+
+    /* CRC32 value in Block or Index */
+    uint32_t crc32;
+
+    /* Type of the integrity check calculated from uncompressed data */
+    enum xz_check check_type;
+
+    /* Operation mode */
+    enum xz_mode mode;
+
+    /*
+     * True if the next call to xz_dec_run() is allowed to return
+     * XZ_BUF_ERROR.
+     */
+    bool allow_buf_error;
+
+    /* Information stored in Block Header */
+    struct {
+        /*
+         * Value stored in the Compressed Size field, or
+         * VLI_UNKNOWN if Compressed Size is not present.
+         */
+        vli_type compressed;
+
+        /*
+         * Value stored in the Uncompressed Size field, or
+         * VLI_UNKNOWN if Uncompressed Size is not present.
+         */
+        vli_type uncompressed;
+
+        /* Size of the Block Header field */
+        uint32_t size;
+    } block_header;
+
+    /* Information collected when decoding Blocks */
+    struct {
+        /* Observed compressed size of the current Block */
+        vli_type compressed;
+
+        /* Observed uncompressed size of the current Block */
+        vli_type uncompressed;
+
+        /* Number of Blocks decoded so far */
+        vli_type count;
+
+        /*
+         * Hash calculated from the Block sizes. This is used to
+         * validate the Index field.
+         */
+        struct xz_dec_hash hash;
+    } block;
+
+    /* Variables needed when verifying the Index field */
+    struct {
+        /* Position in dec_index() */
+        enum {
+            SEQ_INDEX_COUNT,
+            SEQ_INDEX_UNPADDED,
+            SEQ_INDEX_UNCOMPRESSED
+        } sequence;
+
+        /* Size of the Index in bytes */
+        vli_type size;
+
+        /* Number of Records (matches block.count in valid files) */
+        vli_type count;
+
+        /*
+         * Hash calculated from the Records (matches block.hash in
+         * valid files).
+         */
+        struct xz_dec_hash hash;
+    } index;
+
+    /*
+     * Temporary buffer needed to hold Stream Header, Block Header,
+     * and Stream Footer. The Block Header is the biggest (1 KiB)
+     * so we reserve space according to that. buf[] has to be aligned
+     * to a multiple of four bytes; the size_t variables before it
+     * should guarantee this.
+     */
+    struct {
+        size_t pos;
+        size_t size;
+        uint8_t buf[1024];
+    } temp;
+
+    struct xz_dec_lzma2 *lzma2;
 
 #ifdef XZ_DEC_BCJ
-	struct xz_dec_bcj *bcj;
-	bool bcj_active;
+    struct xz_dec_bcj *bcj;
+    bool bcj_active;
 #endif
 };
 
 #ifdef XZ_DEC_ANY_CHECK
 /* Sizes of the Check field with different Check IDs */
 static const uint8_t check_sizes[16] = {
-	0,
-	4, 4, 4,
-	8, 8, 8,
-	16, 16, 16,
-	32, 32, 32,
-	64, 64, 64
+    0,
+    4, 4, 4,
+    8, 8, 8,
+    16, 16, 16,
+    32, 32, 32,
+    64, 64, 64
 };
 #endif
 
@@ -156,51 +156,51 @@ static const uint8_t check_sizes[16] = {
  */
 static bool XZ_FUNC fill_temp(struct xz_dec *s, struct xz_buf *b)
 {
-	size_t copy_size = min_t(size_t,
-			b->in_size - b->in_pos, s->temp.size - s->temp.pos);
+    size_t copy_size = min_t(size_t,
+            b->in_size - b->in_pos, s->temp.size - s->temp.pos);
 
-	memcpy(s->temp.buf + s->temp.pos, b->in + b->in_pos, copy_size);
-	b->in_pos += copy_size;
-	s->temp.pos += copy_size;
+    memcpy(s->temp.buf + s->temp.pos, b->in + b->in_pos, copy_size);
+    b->in_pos += copy_size;
+    s->temp.pos += copy_size;
 
-	if (s->temp.pos == s->temp.size) {
-		s->temp.pos = 0;
-		return true;
-	}
+    if (s->temp.pos == s->temp.size) {
+        s->temp.pos = 0;
+        return true;
+    }
 
-	return false;
+    return false;
 }
 
 /* Decode a variable-length integer (little-endian base-128 encoding) */
 static enum xz_ret XZ_FUNC dec_vli(struct xz_dec *s,
-		const uint8_t *in, size_t *in_pos, size_t in_size)
+        const uint8_t *in, size_t *in_pos, size_t in_size)
 {
-	uint8_t byte;
+    uint8_t byte;
 
-	if (s->pos == 0)
-		s->vli = 0;
+    if (s->pos == 0)
+        s->vli = 0;
 
-	while (*in_pos < in_size) {
-		byte = in[*in_pos];
-		++*in_pos;
+    while (*in_pos < in_size) {
+        byte = in[*in_pos];
+        ++*in_pos;
 
-		s->vli |= (vli_type)(byte & 0x7F) << s->pos;
+        s->vli |= (vli_type)(byte & 0x7F) << s->pos;
 
-		if ((byte & 0x80) == 0) {
-			/* Don't allow non-minimal encodings. */
-			if (byte == 0 && s->pos != 0)
-				return XZ_DATA_ERROR;
+        if ((byte & 0x80) == 0) {
+            /* Don't allow non-minimal encodings. */
+            if (byte == 0 && s->pos != 0)
+                return XZ_DATA_ERROR;
 
-			s->pos = 0;
-			return XZ_STREAM_END;
-		}
+            s->pos = 0;
+            return XZ_STREAM_END;
+        }
 
-		s->pos += 7;
-		if (s->pos == 7 * VLI_BYTES_MAX)
-			return XZ_DATA_ERROR;
-	}
+        s->pos += 7;
+        if (s->pos == 7 * VLI_BYTES_MAX)
+            return XZ_DATA_ERROR;
+    }
 
-	return XZ_OK;
+    return XZ_OK;
 }
 
 /*
@@ -217,72 +217,72 @@ static enum xz_ret XZ_FUNC dec_vli(struct xz_dec *s,
  */
 static enum xz_ret XZ_FUNC dec_block(struct xz_dec *s, struct xz_buf *b)
 {
-	enum xz_ret ret;
+    enum xz_ret ret;
 
-	s->in_start = b->in_pos;
-	s->out_start = b->out_pos;
+    s->in_start = b->in_pos;
+    s->out_start = b->out_pos;
 
 #ifdef XZ_DEC_BCJ
-	if (s->bcj_active)
-		ret = xz_dec_bcj_run(s->bcj, s->lzma2, b);
-	else
+    if (s->bcj_active)
+        ret = xz_dec_bcj_run(s->bcj, s->lzma2, b);
+    else
 #endif
-		ret = xz_dec_lzma2_run(s->lzma2, b);
-
-	s->block.compressed += b->in_pos - s->in_start;
-	s->block.uncompressed += b->out_pos - s->out_start;
-
-	/*
-	 * There is no need to separately check for VLI_UNKNOWN, since
-	 * the observed sizes are always smaller than VLI_UNKNOWN.
-	 */
-	if (s->block.compressed > s->block_header.compressed
-			|| s->block.uncompressed
-				> s->block_header.uncompressed)
-		return XZ_DATA_ERROR;
-
-	if (s->check_type == XZ_CHECK_CRC32)
-		s->crc32 = xz_crc32(b->out + s->out_start,
-				b->out_pos - s->out_start, s->crc32);
-
-	if (ret == XZ_STREAM_END) {
-		if (s->block_header.compressed != VLI_UNKNOWN
-				&& s->block_header.compressed
-					!= s->block.compressed)
-			return XZ_DATA_ERROR;
-
-		if (s->block_header.uncompressed != VLI_UNKNOWN
-				&& s->block_header.uncompressed
-					!= s->block.uncompressed)
-			return XZ_DATA_ERROR;
-
-		s->block.hash.unpadded += s->block_header.size
-				+ s->block.compressed;
+        ret = xz_dec_lzma2_run(s->lzma2, b);
+
+    s->block.compressed += b->in_pos - s->in_start;
+    s->block.uncompressed += b->out_pos - s->out_start;
+
+    /*
+     * There is no need to separately check for VLI_UNKNOWN, since
+     * the observed sizes are always smaller than VLI_UNKNOWN.
+     */
+    if (s->block.compressed > s->block_header.compressed
+            || s->block.uncompressed
+                > s->block_header.uncompressed)
+        return XZ_DATA_ERROR;
+
+    if (s->check_type == XZ_CHECK_CRC32)
+        s->crc32 = xz_crc32(b->out + s->out_start,
+                b->out_pos - s->out_start, s->crc32);
+
+    if (ret == XZ_STREAM_END) {
+        if (s->block_header.compressed != VLI_UNKNOWN
+                && s->block_header.compressed
+                    != s->block.compressed)
+            return XZ_DATA_ERROR;
+
+        if (s->block_header.uncompressed != VLI_UNKNOWN
+                && s->block_header.uncompressed
+                    != s->block.uncompressed)
+            return XZ_DATA_ERROR;
+
+        s->block.hash.unpadded += s->block_header.size
+                + s->block.compressed;
 
 #ifdef XZ_DEC_ANY_CHECK
-		s->block.hash.unpadded += check_sizes[s->check_type];
+        s->block.hash.unpadded += check_sizes[s->check_type];
 #else
-		if (s->check_type == XZ_CHECK_CRC32)
-			s->block.hash.unpadded += 4;
+        if (s->check_type == XZ_CHECK_CRC32)
+            s->block.hash.unpadded += 4;
 #endif
 
-		s->block.hash.uncompressed += s->block.uncompressed;
-		s->block.hash.crc32 = xz_crc32(
-				(const uint8_t *)&s->block.hash,
-				sizeof(s->block.hash), s->block.hash.crc32);
+        s->block.hash.uncompressed += s->block.uncompressed;
+        s->block.hash.crc32 = xz_crc32(
+                (const uint8_t *)&s->block.hash,
+                sizeof(s->block.hash), s->block.hash.crc32);
 
-		++s->block.count;
-	}
+        ++s->block.count;
+    }
 
-	return ret;
+    return ret;
 }
 
 /* Update the Index size and the CRC32 value. */
 static void XZ_FUNC index_update(struct xz_dec *s, const struct xz_buf *b)
 {
-	size_t in_used = b->in_pos - s->in_start;
-	s->index.size += in_used;
-	s->crc32 = xz_crc32(b->in + s->in_start, in_used, s->crc32);
+    size_t in_used = b->in_pos - s->in_start;
+    s->index.size += in_used;
+    s->crc32 = xz_crc32(b->in + s->in_start, in_used, s->crc32);
 }
 
 /*
@@ -295,48 +295,48 @@ static void XZ_FUNC index_update(struct xz_dec *s, const struct xz_buf *b)
  */
 static enum xz_ret XZ_FUNC dec_index(struct xz_dec *s, struct xz_buf *b)
 {
-	enum xz_ret ret;
-
-	do {
-		ret = dec_vli(s, b->in, &b->in_pos, b->in_size);
-		if (ret != XZ_STREAM_END) {
-			index_update(s, b);
-			return ret;
-		}
-
-		switch (s->index.sequence) {
-		case SEQ_INDEX_COUNT:
-			s->index.count = s->vli;
-
-			/*
-			 * Validate that the Number of Records field
-			 * indicates the same number of Records as
-			 * there were Blocks in the Stream.
-			 */
-			if (s->index.count != s->block.count)
-				return XZ_DATA_ERROR;
-
-			s->index.sequence = SEQ_INDEX_UNPADDED;
-			break;
-
-		case SEQ_INDEX_UNPADDED:
-			s->index.hash.unpadded += s->vli;
-			s->index.sequence = SEQ_INDEX_UNCOMPRESSED;
-			break;
-
-		case SEQ_INDEX_UNCOMPRESSED:
-			s->index.hash.uncompressed += s->vli;
-			s->index.hash.crc32 = xz_crc32(
-					(const uint8_t *)&s->index.hash,
-					sizeof(s->index.hash),
-					s->index.hash.crc32);
-			--s->index.count;
-			s->index.sequence = SEQ_INDEX_UNPADDED;
-			break;
-		}
-	} while (s->index.count > 0);
-
-	return XZ_STREAM_END;
+    enum xz_ret ret;
+
+    do {
+        ret = dec_vli(s, b->in, &b->in_pos, b->in_size);
+        if (ret != XZ_STREAM_END) {
+            index_update(s, b);
+            return ret;
+        }
+
+        switch (s->index.sequence) {
+        case SEQ_INDEX_COUNT:
+            s->index.count = s->vli;
+
+            /*
+             * Validate that the Number of Records field
+             * indicates the same number of Records as
+             * there were Blocks in the Stream.
+             */
+            if (s->index.count != s->block.count)
+                return XZ_DATA_ERROR;
+
+            s->index.sequence = SEQ_INDEX_UNPADDED;
+            break;
+
+        case SEQ_INDEX_UNPADDED:
+            s->index.hash.unpadded += s->vli;
+            s->index.sequence = SEQ_INDEX_UNCOMPRESSED;
+            break;
+
+        case SEQ_INDEX_UNCOMPRESSED:
+            s->index.hash.uncompressed += s->vli;
+            s->index.hash.crc32 = xz_crc32(
+                    (const uint8_t *)&s->index.hash,
+                    sizeof(s->index.hash),
+                    s->index.hash.crc32);
+            --s->index.count;
+            s->index.sequence = SEQ_INDEX_UNPADDED;
+            break;
+        }
+    } while (s->index.count > 0);
+
+    return XZ_STREAM_END;
 }
 
 /*
@@ -345,21 +345,21 @@ static enum xz_ret XZ_FUNC dec_index(struct xz_dec *s, struct xz_buf *b)
  */
 static enum xz_ret XZ_FUNC crc32_validate(struct xz_dec *s, struct xz_buf *b)
 {
-	do {
-		if (b->in_pos == b->in_size)
-			return XZ_OK;
+    do {
+        if (b->in_pos == b->in_size)
+            return XZ_OK;
 
-		if (((s->crc32 >> s->pos) & 0xFF) != b->in[b->in_pos++])
-			return XZ_DATA_ERROR;
+        if (((s->crc32 >> s->pos) & 0xFF) != b->in[b->in_pos++])
+            return XZ_DATA_ERROR;
 
-		s->pos += 8;
+        s->pos += 8;
 
-	} while (s->pos < 32);
+    } while (s->pos < 32);
 
-	s->crc32 = 0;
-	s->pos = 0;
+    s->crc32 = 0;
+    s->pos = 0;
 
-	return XZ_STREAM_END;
+    return XZ_STREAM_END;
 }
 
 #ifdef XZ_DEC_ANY_CHECK
@@ -369,341 +369,354 @@ static enum xz_ret XZ_FUNC crc32_validate(struct xz_dec *s, struct xz_buf *b)
  */
 static bool XZ_FUNC check_skip(struct xz_dec *s, struct xz_buf *b)
 {
-	while (s->pos < check_sizes[s->check_type]) {
-		if (b->in_pos == b->in_size)
-			return false;
+    while (s->pos < check_sizes[s->check_type]) {
+        if (b->in_pos == b->in_size)
+            return false;
 
-		++b->in_pos;
-		++s->pos;
-	}
+        ++b->in_pos;
+        ++s->pos;
+    }
 
-	s->pos = 0;
+    s->pos = 0;
 
-	return true;
+    return true;
 }
 #endif
 
 /* Decode the Stream Header field (the first 12 bytes of the .xz Stream). */
 static enum xz_ret XZ_FUNC dec_stream_header(struct xz_dec *s)
 {
-	if (!memeq(s->temp.buf, HEADER_MAGIC, HEADER_MAGIC_SIZE))
-		return XZ_FORMAT_ERROR;
+    if (!memeq(s->temp.buf, HEADER_MAGIC, HEADER_MAGIC_SIZE))
+        return XZ_FORMAT_ERROR;
 
-	if (xz_crc32(s->temp.buf + HEADER_MAGIC_SIZE, 2, 0)
-			!= get_le32(s->temp.buf + HEADER_MAGIC_SIZE + 2))
-		return XZ_DATA_ERROR;
+    if (xz_crc32(s->temp.buf + HEADER_MAGIC_SIZE, 2, 0)
+            != get_le32(s->temp.buf + HEADER_MAGIC_SIZE + 2))
+        return XZ_DATA_ERROR;
 
-	if (s->temp.buf[HEADER_MAGIC_SIZE] != 0)
-		return XZ_OPTIONS_ERROR;
+    if (s->temp.buf[HEADER_MAGIC_SIZE] != 0)
+        return XZ_OPTIONS_ERROR;
 
-	/*
-	 * Of integrity checks, we support only none (Check ID = 0) and
-	 * CRC32 (Check ID = 1). However, if XZ_DEC_ANY_CHECK is defined,
-	 * we will accept other check types too, but then the check won't
-	 * be verified and a warning (XZ_UNSUPPORTED_CHECK) will be given.
-	 */
-	s->check_type = s->temp.buf[HEADER_MAGIC_SIZE + 1];
+    /*
+     * Of integrity checks, we support only none (Check ID = 0) and
+     * CRC32 (Check ID = 1). However, if XZ_DEC_ANY_CHECK is defined,
+     * we will accept other check types too, but then the check won't
+     * be verified and a warning (XZ_UNSUPPORTED_CHECK) will be given.
+     */
+    s->check_type = s->temp.buf[HEADER_MAGIC_SIZE + 1];
 
 #ifdef XZ_DEC_ANY_CHECK
-	if (s->check_type > XZ_CHECK_MAX)
-		return XZ_OPTIONS_ERROR;
+    if (s->check_type > XZ_CHECK_MAX)
+        return XZ_OPTIONS_ERROR;
 
-	if (s->check_type > XZ_CHECK_CRC32)
-		return XZ_UNSUPPORTED_CHECK;
+    if (s->check_type > XZ_CHECK_CRC32)
+        return XZ_UNSUPPORTED_CHECK;
 #else
-	if (s->check_type > XZ_CHECK_CRC32)
-		return XZ_OPTIONS_ERROR;
+    if (s->check_type > XZ_CHECK_CRC32)
+        return XZ_OPTIONS_ERROR;
 #endif
 
-	return XZ_OK;
+    return XZ_OK;
 }
 
 /* Decode the Stream Footer field (the last 12 bytes of the .xz Stream) */
 static enum xz_ret XZ_FUNC dec_stream_footer(struct xz_dec *s)
 {
-	if (!memeq(s->temp.buf + 10, FOOTER_MAGIC, FOOTER_MAGIC_SIZE))
-		return XZ_DATA_ERROR;
-
-	if (xz_crc32(s->temp.buf + 4, 6, 0) != get_le32(s->temp.buf))
-		return XZ_DATA_ERROR;
-
-	/*
-	 * Validate Backward Size. Note that we never added the size of the
-	 * Index CRC32 field to s->index.size, thus we use s->index.size / 4
-	 * instead of s->index.size / 4 - 1.
-	 */
-	if ((s->index.size >> 2) != get_le32(s->temp.buf + 4))
-		return XZ_DATA_ERROR;
-
-	if (s->temp.buf[8] != 0 || s->temp.buf[9] != s->check_type)
-		return XZ_DATA_ERROR;
-
-	/*
-	 * Use XZ_STREAM_END instead of XZ_OK to be more convenient
-	 * for the caller.
-	 */
-	return XZ_STREAM_END;
+    if (!memeq(s->temp.buf + 10, FOOTER_MAGIC, FOOTER_MAGIC_SIZE))
+        return XZ_DATA_ERROR;
+
+    if (xz_crc32(s->temp.buf + 4, 6, 0) != get_le32(s->temp.buf))
+        return XZ_DATA_ERROR;
+
+    /*
+     * Validate Backward Size. Note that we never added the size of the
+     * Index CRC32 field to s->index.size, thus we use s->index.size / 4
+     * instead of s->index.size / 4 - 1.
+     */
+    if ((s->index.size >> 2) != get_le32(s->temp.buf + 4))
+        return XZ_DATA_ERROR;
+
+    if (s->temp.buf[8] != 0 || s->temp.buf[9] != s->check_type)
+        return XZ_DATA_ERROR;
+
+    /*
+     * Use XZ_STREAM_END instead of XZ_OK to be more convenient
+     * for the caller.
+     */
+    return XZ_STREAM_END;
 }
 
 /* Decode the Block Header and initialize the filter chain. */
 static enum xz_ret XZ_FUNC dec_block_header(struct xz_dec *s)
 {
-	enum xz_ret ret;
-
-	/*
-	 * Validate the CRC32. We know that the temp buffer is at least
-	 * eight bytes so this is safe.
-	 */
-	s->temp.size -= 4;
-	if (xz_crc32(s->temp.buf, s->temp.size, 0)
-			!= get_le32(s->temp.buf + s->temp.size))
-		return XZ_DATA_ERROR;
-
-	s->temp.pos = 2;
-
-	/*
-	 * Catch unsupported Block Flags. We support only one or two filters
-	 * in the chain, so we catch that with the same test.
-	 */
+    enum xz_ret ret;
+
+    /*
+     * Validate the CRC32. We know that the temp buffer is at least
+     * eight bytes so this is safe.
+     */
+    s->temp.size -= 4;
+    if (xz_crc32(s->temp.buf, s->temp.size, 0)
+            != get_le32(s->temp.buf + s->temp.size))
+        return XZ_DATA_ERROR;
+
+    s->temp.pos = 2;
+
+    /*
+     * Catch unsupported Block Flags. We support only one or two filters
+     * in the chain, so we catch that with the same test.
+     */
 #ifdef XZ_DEC_BCJ
-	if (s->temp.buf[1] & 0x3E)
+    if (s->temp.buf[1] & 0x3E)
 #else
-	if (s->temp.buf[1] & 0x3F)
+    if (s->temp.buf[1] & 0x3F)
 #endif
-		return XZ_OPTIONS_ERROR;
-
-	/* Compressed Size */
-	if (s->temp.buf[1] & 0x40) {
-		if (dec_vli(s, s->temp.buf, &s->temp.pos, s->temp.size)
-					!= XZ_STREAM_END)
-			return XZ_DATA_ERROR;
-
-		s->block_header.compressed = s->vli;
-	} else {
-		s->block_header.compressed = VLI_UNKNOWN;
-	}
-
-	/* Uncompressed Size */
-	if (s->temp.buf[1] & 0x80) {
-		if (dec_vli(s, s->temp.buf, &s->temp.pos, s->temp.size)
-				!= XZ_STREAM_END)
-			return XZ_DATA_ERROR;
-
-		s->block_header.uncompressed = s->vli;
-	} else {
-		s->block_header.uncompressed = VLI_UNKNOWN;
-	}
+        return XZ_OPTIONS_ERROR;
+
+    /* Compressed Size */
+    if (s->temp.buf[1] & 0x40) {
+        if (dec_vli(s, s->temp.buf, &s->temp.pos, s->temp.size)
+                    != XZ_STREAM_END)
+            return XZ_DATA_ERROR;
+
+        s->block_header.compressed = s->vli;
+    } else {
+        s->block_header.compressed = VLI_UNKNOWN;
+    }
+
+    /* Uncompressed Size */
+    if (s->temp.buf[1] & 0x80) {
+        if (dec_vli(s, s->temp.buf, &s->temp.pos, s->temp.size)
+                != XZ_STREAM_END)
+            return XZ_DATA_ERROR;
+
+        s->block_header.uncompressed = s->vli;
+    } else {
+        s->block_header.uncompressed = VLI_UNKNOWN;
+    }
 
 #ifdef XZ_DEC_BCJ
-	/* If there are two filters, the first one must be a BCJ filter. */
-	s->bcj_active = s->temp.buf[1] & 0x01;
-	if (s->bcj_active) {
-		if (s->temp.size - s->temp.pos < 2)
-			return XZ_OPTIONS_ERROR;
-
-		ret = xz_dec_bcj_reset(s->bcj, s->temp.buf[s->temp.pos++]);
-		if (ret != XZ_OK)
-			return ret;
-
-		/*
-		 * We don't support custom start offset,
-		 * so Size of Properties must be zero.
-		 */
-		if (s->temp.buf[s->temp.pos++] != 0x00)
-			return XZ_OPTIONS_ERROR;
-	}
+    /* If there are two filters, the first one must be a BCJ filter. */
+    s->bcj_active = s->temp.buf[1] & 0x01;
+    if (s->bcj_active) {
+        if (s->temp.size - s->temp.pos < 2)
+            return XZ_OPTIONS_ERROR;
+
+        ret = xz_dec_bcj_reset(s->bcj, s->temp.buf[s->temp.pos++]);
+        if (ret != XZ_OK)
+            return ret;
+
+        /*
+         * We don't support custom start offset,
+         * so Size of Properties must be zero.
+         */
+        if (s->temp.buf[s->temp.pos++] != 0x00)
+            return XZ_OPTIONS_ERROR;
+    }
 #endif
 
-	/* Valid Filter Flags always take at least two bytes. */
-	if (s->temp.size - s->temp.pos < 2)
-		return XZ_DATA_ERROR;
+    /* Valid Filter Flags always take at least two bytes. */
+    if (s->temp.size - s->temp.pos < 2)
+        return XZ_DATA_ERROR;
 
-	/* Filter ID = LZMA2 */
-	if (s->temp.buf[s->temp.pos++] != 0x21)
-		return XZ_OPTIONS_ERROR;
+    /* Filter ID = LZMA2 */
+    if (s->temp.buf[s->temp.pos++] != 0x21)
+        return XZ_OPTIONS_ERROR;
 
-	/* Size of Properties = 1-byte Filter Properties */
-	if (s->temp.buf[s->temp.pos++] != 0x01)
-		return XZ_OPTIONS_ERROR;
+    /* Size of Properties = 1-byte Filter Properties */
+    if (s->temp.buf[s->temp.pos++] != 0x01)
+        return XZ_OPTIONS_ERROR;
 
-	/* Filter Properties contains LZMA2 dictionary size. */
-	if (s->temp.size - s->temp.pos < 1)
-		return XZ_DATA_ERROR;
+    /* Filter Properties contains LZMA2 dictionary size. */
+    if (s->temp.size - s->temp.pos < 1)
+        return XZ_DATA_ERROR;
 
-	ret = xz_dec_lzma2_reset(s->lzma2, s->temp.buf[s->temp.pos++]);
-	if (ret != XZ_OK)
-		return ret;
+    ret = xz_dec_lzma2_reset(s->lzma2, s->temp.buf[s->temp.pos++]);
+    if (ret != XZ_OK)
+        return ret;
 
-	/* The rest must be Header Padding. */
-	while (s->temp.pos < s->temp.size)
-		if (s->temp.buf[s->temp.pos++] != 0x00)
-			return XZ_OPTIONS_ERROR;
+    /* The rest must be Header Padding. */
+    while (s->temp.pos < s->temp.size)
+        if (s->temp.buf[s->temp.pos++] != 0x00)
+            return XZ_OPTIONS_ERROR;
 
-	s->temp.pos = 0;
-	s->block.compressed = 0;
-	s->block.uncompressed = 0;
+    s->temp.pos = 0;
+    s->block.compressed = 0;
+    s->block.uncompressed = 0;
 
-	return XZ_OK;
+    return XZ_OK;
 }
 
 static enum xz_ret XZ_FUNC dec_main(struct xz_dec *s, struct xz_buf *b)
 {
-	enum xz_ret ret;
-
-	/*
-	 * Store the start position for the case when we are in the middle
-	 * of the Index field.
-	 */
-	s->in_start = b->in_pos;
-
-	while (true) {
-		switch (s->sequence) {
-		case SEQ_STREAM_HEADER:
-			/*
-			 * Stream Header is copied to s->temp, and then
-			 * decoded from there. This way if the caller
-			 * gives us only little input at a time, we can
-			 * still keep the Stream Header decoding code
-			 * simple. Similar approach is used in many places
-			 * in this file.
-			 */
-			if (!fill_temp(s, b))
-				return XZ_OK;
-
-			/*
-			 * If dec_stream_header() returns
-			 * XZ_UNSUPPORTED_CHECK, it is still possible
-			 * to continue decoding if working in multi-call
-			 * mode. Thus, update s->sequence before calling
-			 * dec_stream_header().
-			 */
-			s->sequence = SEQ_BLOCK_START;
-
-			ret = dec_stream_header(s);
-			if (ret != XZ_OK)
-				return ret;
-
-		case SEQ_BLOCK_START:
-			/* We need one byte of input to continue. */
-			if (b->in_pos == b->in_size)
-				return XZ_OK;
-
-			/* See if this is the beginning of the Index field. */
-			if (b->in[b->in_pos] == 0) {
-				s->in_start = b->in_pos++;
-				s->sequence = SEQ_INDEX;
-				break;
-			}
-
-			/*
-			 * Calculate the size of the Block Header and
-			 * prepare to decode it.
-			 */
-			s->block_header.size
-				= ((uint32_t)b->in[b->in_pos] + 1) * 4;
-
-			s->temp.size = s->block_header.size;
-			s->temp.pos = 0;
-			s->sequence = SEQ_BLOCK_HEADER;
-
-		case SEQ_BLOCK_HEADER:
-			if (!fill_temp(s, b))
-				return XZ_OK;
-
-			ret = dec_block_header(s);
-			if (ret != XZ_OK)
-				return ret;
-
-			s->sequence = SEQ_BLOCK_UNCOMPRESS;
-
-		case SEQ_BLOCK_UNCOMPRESS:
-			ret = dec_block(s, b);
-			if (ret != XZ_STREAM_END)
-				return ret;
-
-			s->sequence = SEQ_BLOCK_PADDING;
-
-		case SEQ_BLOCK_PADDING:
-			/*
-			 * Size of Compressed Data + Block Padding
-			 * must be a multiple of four. We don't need
-			 * s->block.compressed for anything else
-			 * anymore, so we use it here to test the size
-			 * of the Block Padding field.
-			 */
-			while (s->block.compressed & 3) {
-				if (b->in_pos == b->in_size)
-					return XZ_OK;
-
-				if (b->in[b->in_pos++] != 0)
-					return XZ_DATA_ERROR;
-
-				++s->block.compressed;
-			}
-
-			s->sequence = SEQ_BLOCK_CHECK;
-
-		case SEQ_BLOCK_CHECK:
-			if (s->check_type == XZ_CHECK_CRC32) {
-				ret = crc32_validate(s, b);
-				if (ret != XZ_STREAM_END)
-					return ret;
-			}
+    enum xz_ret ret;
+
+    /*
+     * Store the start position for the case when we are in the middle
+     * of the Index field.
+     */
+    s->in_start = b->in_pos;
+
+    while (true) {
+        switch (s->sequence) {
+        case SEQ_STREAM_HEADER:
+            /*
+             * Stream Header is copied to s->temp, and then
+             * decoded from there. This way if the caller
+             * gives us only little input at a time, we can
+             * still keep the Stream Header decoding code
+             * simple. Similar approach is used in many places
+             * in this file.
+             */
+            if (!fill_temp(s, b))
+                return XZ_OK;
+
+            /*
+             * If dec_stream_header() returns
+             * XZ_UNSUPPORTED_CHECK, it is still possible
+             * to continue decoding if working in multi-call
+             * mode. Thus, update s->sequence before calling
+             * dec_stream_header().
+             */
+            s->sequence = SEQ_BLOCK_START;
+
+            ret = dec_stream_header(s);
+            if (ret != XZ_OK)
+                return ret;
+            #ifndef __clang__
+            __attribute__ ((fallthrough));
+            #endif
+        case SEQ_BLOCK_START:
+            /* We need one byte of input to continue. */
+            if (b->in_pos == b->in_size)
+                return XZ_OK;
+
+            /* See if this is the beginning of the Index field. */
+            if (b->in[b->in_pos] == 0) {
+                s->in_start = b->in_pos++;
+                s->sequence = SEQ_INDEX;
+                break;
+            }
+
+            /*
+             * Calculate the size of the Block Header and
+             * prepare to decode it.
+             */
+            s->block_header.size
+                = ((uint32_t)b->in[b->in_pos] + 1) * 4;
+
+            s->temp.size = s->block_header.size;
+            s->temp.pos = 0;
+            s->sequence = SEQ_BLOCK_HEADER;
+            #ifndef __clang__
+            __attribute__ ((fallthrough));
+            #endif
+        case SEQ_BLOCK_HEADER:
+            if (!fill_temp(s, b))
+                return XZ_OK;
+
+            ret = dec_block_header(s);
+            if (ret != XZ_OK)
+                return ret;
+
+            s->sequence = SEQ_BLOCK_UNCOMPRESS;
+            #ifndef __clang__
+            __attribute__ ((fallthrough));
+            #endif
+        case SEQ_BLOCK_UNCOMPRESS:
+            ret = dec_block(s, b);
+            if (ret != XZ_STREAM_END)
+                return ret;
+
+            s->sequence = SEQ_BLOCK_PADDING;
+
+        case SEQ_BLOCK_PADDING:
+            /*
+             * Size of Compressed Data + Block Padding
+             * must be a multiple of four. We don't need
+             * s->block.compressed for anything else
+             * anymore, so we use it here to test the size
+             * of the Block Padding field.
+             */
+            while (s->block.compressed & 3) {
+                if (b->in_pos == b->in_size)
+                    return XZ_OK;
+
+                if (b->in[b->in_pos++] != 0)
+                    return XZ_DATA_ERROR;
+
+                ++s->block.compressed;
+            }
+
+            s->sequence = SEQ_BLOCK_CHECK;
+            #ifndef __clang__
+            __attribute__ ((fallthrough));
+            #endif
+        case SEQ_BLOCK_CHECK:
+            if (s->check_type == XZ_CHECK_CRC32) {
+                ret = crc32_validate(s, b);
+                if (ret != XZ_STREAM_END)
+                    return ret;
+            }
 #ifdef XZ_DEC_ANY_CHECK
-			else if (!check_skip(s, b)) {
-				return XZ_OK;
-			}
+            else if (!check_skip(s, b)) {
+                return XZ_OK;
+            }
 #endif
 
-			s->sequence = SEQ_BLOCK_START;
-			break;
-
-		case SEQ_INDEX:
-			ret = dec_index(s, b);
-			if (ret != XZ_STREAM_END)
-				return ret;
-
-			s->sequence = SEQ_INDEX_PADDING;
-
-		case SEQ_INDEX_PADDING:
-			while ((s->index.size + (b->in_pos - s->in_start))
-					& 3) {
-				if (b->in_pos == b->in_size) {
-					index_update(s, b);
-					return XZ_OK;
-				}
-
-				if (b->in[b->in_pos++] != 0)
-					return XZ_DATA_ERROR;
-			}
-
-			/* Finish the CRC32 value and Index size. */
-			index_update(s, b);
-
-			/* Compare the hashes to validate the Index field. */
-			if (!memeq(&s->block.hash, &s->index.hash,
-					sizeof(s->block.hash)))
-				return XZ_DATA_ERROR;
-
-			s->sequence = SEQ_INDEX_CRC32;
-
-		case SEQ_INDEX_CRC32:
-			ret = crc32_validate(s, b);
-			if (ret != XZ_STREAM_END)
-				return ret;
-
-			s->temp.size = STREAM_HEADER_SIZE;
-			s->sequence = SEQ_STREAM_FOOTER;
-
-		case SEQ_STREAM_FOOTER:
-			if (!fill_temp(s, b))
-				return XZ_OK;
-
-			return dec_stream_footer(s);
-		}
-	}
-
-	/* Never reached */
+            s->sequence = SEQ_BLOCK_START;
+            break;
+        case SEQ_INDEX:
+            ret = dec_index(s, b);
+            if (ret != XZ_STREAM_END)
+                return ret;
+
+            s->sequence = SEQ_INDEX_PADDING;
+            #ifndef __clang__
+            __attribute__ ((fallthrough));
+            #endif
+        case SEQ_INDEX_PADDING:
+            while ((s->index.size + (b->in_pos - s->in_start))
+                    & 3) {
+                if (b->in_pos == b->in_size) {
+                    index_update(s, b);
+                    return XZ_OK;
+                }
+
+                if (b->in[b->in_pos++] != 0)
+                    return XZ_DATA_ERROR;
+            }
+
+            /* Finish the CRC32 value and Index size. */
+            index_update(s, b);
+
+            /* Compare the hashes to validate the Index field. */
+            if (!memeq(&s->block.hash, &s->index.hash,
+                    sizeof(s->block.hash)))
+                return XZ_DATA_ERROR;
+
+            s->sequence = SEQ_INDEX_CRC32;
+            #ifndef __clang__
+            __attribute__ ((fallthrough));
+            #endif
+        case SEQ_INDEX_CRC32:
+            ret = crc32_validate(s, b);
+            if (ret != XZ_STREAM_END)
+                return ret;
+
+            s->temp.size = STREAM_HEADER_SIZE;
+            s->sequence = SEQ_STREAM_FOOTER;
+            #ifndef __clang__
+            __attribute__ ((fallthrough));
+            #endif
+        case SEQ_STREAM_FOOTER:
+            if (!fill_temp(s, b))
+                return XZ_OK;
+
+            return dec_stream_footer(s);
+        }
+    }
+
+    /* Never reached */
 }
 
 /*
@@ -733,90 +746,90 @@ static enum xz_ret XZ_FUNC dec_main(struct xz_dec *s, struct xz_buf *b)
  */
 XZ_EXTERN enum xz_ret XZ_FUNC xz_dec_run(struct xz_dec *s, struct xz_buf *b)
 {
-	size_t in_start;
-	size_t out_start;
-	enum xz_ret ret;
-
-	if (DEC_IS_SINGLE(s->mode))
-		xz_dec_reset(s);
-
-	in_start = b->in_pos;
-	out_start = b->out_pos;
-	ret = dec_main(s, b);
-
-	if (DEC_IS_SINGLE(s->mode)) {
-		if (ret == XZ_OK)
-			ret = b->in_pos == b->in_size
-					? XZ_DATA_ERROR : XZ_BUF_ERROR;
-
-		if (ret != XZ_STREAM_END) {
-			b->in_pos = in_start;
-			b->out_pos = out_start;
-		}
-
-	} else if (ret == XZ_OK && in_start == b->in_pos
-			&& out_start == b->out_pos) {
-		if (s->allow_buf_error)
-			ret = XZ_BUF_ERROR;
-
-		s->allow_buf_error = true;
-	} else {
-		s->allow_buf_error = false;
-	}
-
-	return ret;
+    size_t in_start;
+    size_t out_start;
+    enum xz_ret ret;
+
+    if (DEC_IS_SINGLE(s->mode))
+        xz_dec_reset(s);
+
+    in_start = b->in_pos;
+    out_start = b->out_pos;
+    ret = dec_main(s, b);
+
+    if (DEC_IS_SINGLE(s->mode)) {
+        if (ret == XZ_OK)
+            ret = b->in_pos == b->in_size
+                    ? XZ_DATA_ERROR : XZ_BUF_ERROR;
+
+        if (ret != XZ_STREAM_END) {
+            b->in_pos = in_start;
+            b->out_pos = out_start;
+        }
+
+    } else if (ret == XZ_OK && in_start == b->in_pos
+            && out_start == b->out_pos) {
+        if (s->allow_buf_error)
+            ret = XZ_BUF_ERROR;
+
+        s->allow_buf_error = true;
+    } else {
+        s->allow_buf_error = false;
+    }
+
+    return ret;
 }
 
 XZ_EXTERN struct xz_dec * XZ_FUNC xz_dec_init(
-		enum xz_mode mode, uint32_t dict_max)
+        enum xz_mode mode, uint32_t dict_max)
 {
-	struct xz_dec *s = kmalloc(sizeof(*s), GFP_KERNEL);
-	if (s == NULL)
-		return NULL;
+    struct xz_dec *s = kmalloc(sizeof(*s), GFP_KERNEL);
+    if (s == NULL)
+        return NULL;
 
-	s->mode = mode;
+    s->mode = mode;
 
 #ifdef XZ_DEC_BCJ
-	s->bcj = xz_dec_bcj_create(DEC_IS_SINGLE(mode));
-	if (s->bcj == NULL)
-		goto error_bcj;
+    s->bcj = xz_dec_bcj_create(DEC_IS_SINGLE(mode));
+    if (s->bcj == NULL)
+        goto error_bcj;
 #endif
 
-	s->lzma2 = xz_dec_lzma2_create(mode, dict_max);
-	if (s->lzma2 == NULL)
-		goto error_lzma2;
+    s->lzma2 = xz_dec_lzma2_create(mode, dict_max);
+    if (s->lzma2 == NULL)
+        goto error_lzma2;
 
-	xz_dec_reset(s);
-	return s;
+    xz_dec_reset(s);
+    return s;
 
 error_lzma2:
 #ifdef XZ_DEC_BCJ
-	xz_dec_bcj_end(s->bcj);
+    xz_dec_bcj_end(s->bcj);
 error_bcj:
 #endif
-	kfree(s);
-	return NULL;
+    kfree(s);
+    return NULL;
 }
 
 XZ_EXTERN void XZ_FUNC xz_dec_reset(struct xz_dec *s)
 {
-	s->sequence = SEQ_STREAM_HEADER;
-	s->allow_buf_error = false;
-	s->pos = 0;
-	s->crc32 = 0;
-	memzero(&s->block, sizeof(s->block));
-	memzero(&s->index, sizeof(s->index));
-	s->temp.pos = 0;
-	s->temp.size = STREAM_HEADER_SIZE;
+    s->sequence = SEQ_STREAM_HEADER;
+    s->allow_buf_error = false;
+    s->pos = 0;
+    s->crc32 = 0;
+    memzero(&s->block, sizeof(s->block));
+    memzero(&s->index, sizeof(s->index));
+    s->temp.pos = 0;
+    s->temp.size = STREAM_HEADER_SIZE;
 }
 
 XZ_EXTERN void XZ_FUNC xz_dec_end(struct xz_dec *s)
 {
-	if (s != NULL) {
-		xz_dec_lzma2_end(s->lzma2);
+    if (s != NULL) {
+        xz_dec_lzma2_end(s->lzma2);
 #ifdef XZ_DEC_BCJ
-		xz_dec_bcj_end(s->bcj);
+        xz_dec_bcj_end(s->bcj);
 #endif
-		kfree(s);
-	}
+        kfree(s);
+    }
 }