+/* Default WIM version number. Blobs are always compressed independently. */
+#define WIM_VERSION_DEFAULT 0x10d00
+
+/* Version number used for WIMs that allow multiple blobs combined into one
+ * resource ("solid resources", marked by WIM_RESHDR_FLAG_SOLID) and also a new
+ * compression format (LZMS). This version is new as of Windows 8 WIMGAPI.
+ * Although it is used by Windows 8 web downloader, it is not yet documented by
+ * Microsoft. */
+#define WIM_VERSION_SOLID 0xe00
+
+/* Note: there is another WIM version from Vista pre-releases, but it is not
+ * supported by wimlib. */
+
+/* WIM magic characters, translated to a single 64-bit number. */
+#define WIM_MAGIC \
+ (((u64)'M' << 0) | \
+ ((u64)'S' << 8) | \
+ ((u64)'W' << 16) | \
+ ((u64)'I' << 24) | \
+ ((u64)'M' << 32) | \
+ ((u64)'\0' << 40) | \
+ ((u64)'\0' << 48) | \
+ ((u64)'\0' << 54))
+
+/* wimlib pipable WIM magic characters, translated to a single 64-bit number.
+ * */
+#define PWM_MAGIC \
+ (((u64)'W' << 0) | \
+ ((u64)'L' << 8) | \
+ ((u64)'P' << 16) | \
+ ((u64)'W' << 24) | \
+ ((u64)'M' << 32) | \
+ ((u64)'\0' << 40) | \
+ ((u64)'\0' << 48) | \
+ ((u64)'\0' << 54))
+
+/* On-disk format of the WIM header. */
+struct wim_header_disk {
+
+ /* +0x00: Magic characters WIM_MAGIC or PWM_MAGIC. */
+ le64 magic;
+
+ /* +0x08: Size of the WIM header, in bytes; WIM_HEADER_DISK_SIZE
+ * expected (currently the only supported value). */
+ le32 hdr_size;
+
+ /* +0x0c: Version of the WIM file. Recognized values are the
+ * WIM_VERSION_* constants from above. */
+ le32 wim_version;
+
+ /* +0x10: Flags for the WIM file (WIM_HDR_FLAG_*). */
+ le32 wim_flags;
+
+ /* +0x14: Uncompressed chunk size for non-solid compressed resources in
+ * the WIM or 0 if the WIM is uncompressed. */
+ le32 chunk_size;
+
+ /* +0x18: Globally unique identifier for the WIM file. Basically a
+ * bunch of random bytes. */
+ u8 guid[GUID_SIZE];
+
+ /* +0x28: Number of this WIM part in the split WIM file, indexed from 1,
+ * or 1 if the WIM is not split. */
+ le16 part_number;
+
+ /* +0x2a: Total number of parts of the split WIM file, or 1 if the WIM
+ * is not split. */
+ le16 total_parts;
+
+ /* +0x2c: Number of images in the WIM. WIMGAPI requires that this be at
+ * least 1. wimlib allows 0. */
+ le32 image_count;
+
+ /* +0x30: Location and size of the WIM's blob table. */
+ struct wim_reshdr_disk blob_table_reshdr;
+
+ /* +0x48: Location and size of the WIM's XML data. */
+ struct wim_reshdr_disk xml_data_reshdr;
+
+ /* +0x60: Location and size of metadata resource for the bootable image
+ * of the WIM, or all zeroes if no image is bootable. */
+ struct wim_reshdr_disk boot_metadata_reshdr;
+
+ /* +0x78: 1-based index of the bootable image of the WIM, or 0 if no
+ * image is bootable. */
+ le32 boot_idx;
+
+ /* +0x7c: Location and size of the WIM's integrity table, or all zeroes
+ * if the WIM has no integrity table.
+ *
+ * Note the integrity_table_reshdr here is 4-byte aligned even though it
+ * would ordinarily be 8-byte aligned--- hence, the _packed_attribute on
+ * this structure is essential. */
+ struct wim_reshdr_disk integrity_table_reshdr;
+
+ /* +0x94: Unused bytes. */
+ u8 unused[60];
+
+ /* +0xd0 (208) */
+} _packed_attribute;
+
+#define MAX_IMAGES (((INT_MAX < INT32_MAX) ? INT_MAX : INT32_MAX) - 1)
+
+/* In-memory representation of a WIM header. See `struct wim_header_disk' for
+ * field descriptions. */