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diff --git a/src/liblzma/api/lzma/bcj.h b/src/liblzma/api/lzma/bcj.h
new file mode 100644
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+++ b/src/liblzma/api/lzma/bcj.h
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+/**
+ * \file        lzma/bcj.h
+ * \brief       Branch/Call/Jump conversion filters
+ * \note        Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+#	error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/* Filter IDs for lzma_filter.id */
+
+/**
+ * \brief       Filter for x86 binaries
+ */
+#define LZMA_FILTER_X86         LZMA_VLI_C(0x04)
+
+/**
+ * \brief       Filter for Big endian PowerPC binaries
+ */
+#define LZMA_FILTER_POWERPC     LZMA_VLI_C(0x05)
+
+/**
+ * \brief       Filter for IA-64 (Itanium) binaries
+ */
+#define LZMA_FILTER_IA64        LZMA_VLI_C(0x06)
+
+/**
+ * \brief       Filter for ARM binaries
+ */
+#define LZMA_FILTER_ARM         LZMA_VLI_C(0x07)
+
+/**
+ * \brief       Filter for ARM-Thumb binaries
+ */
+#define LZMA_FILTER_ARMTHUMB    LZMA_VLI_C(0x08)
+
+/**
+ * \brief       Filter for SPARC binaries
+ */
+#define LZMA_FILTER_SPARC       LZMA_VLI_C(0x09)
+
+/**
+ * \brief       Filter for ARM64 binaries
+ */
+#define LZMA_FILTER_ARM64       LZMA_VLI_C(0x0A)
+
+
+/**
+ * \brief       Options for BCJ filters
+ *
+ * The BCJ filters never change the size of the data. Specifying options
+ * for them is optional: if pointer to options is NULL, default value is
+ * used. You probably never need to specify options to BCJ filters, so just
+ * set the options pointer to NULL and be happy.
+ *
+ * If options with non-default values have been specified when encoding,
+ * the same options must also be specified when decoding.
+ *
+ * \note        At the moment, none of the BCJ filters support
+ *              LZMA_SYNC_FLUSH. If LZMA_SYNC_FLUSH is specified,
+ *              LZMA_OPTIONS_ERROR will be returned. If there is need,
+ *              partial support for LZMA_SYNC_FLUSH can be added in future.
+ *              Partial means that flushing would be possible only at
+ *              offsets that are multiple of 2, 4, or 16 depending on
+ *              the filter, except x86 which cannot be made to support
+ *              LZMA_SYNC_FLUSH predictably.
+ */
+typedef struct {
+	/**
+	 * \brief       Start offset for conversions
+	 *
+	 * This setting is useful only when the same filter is used
+	 * _separately_ for multiple sections of the same executable file,
+	 * and the sections contain cross-section branch/call/jump
+	 * instructions. In that case it is beneficial to set the start
+	 * offset of the non-first sections so that the relative addresses
+	 * of the cross-section branch/call/jump instructions will use the
+	 * same absolute addresses as in the first section.
+	 *
+	 * When the pointer to options is NULL, the default value (zero)
+	 * is used.
+	 */
+	uint32_t start_offset;
+
+} lzma_options_bcj;