/* Version number used for WIMs that allow multiple streams packed into one
* resource (WIM_RESHDR_FLAG_PACKED_STREAMS). New as of Windows 8 WIMGAPI; used
- * for the Windows 8 web downloader, but yet properly documented by Microsoft.
- */
+ * for the Windows 8 web downloader, but yet not yet properly documented by
+ * Microsoft. */
#define WIM_VERSION_PACKED_STREAMS 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 little endian number. */
-#define WIM_MAGIC \
- cpu_to_le64(((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 little
- * endian number. */
-#define PWM_MAGIC \
- cpu_to_le64(((u64)'W' << 0) | \
- ((u64)'L' << 8) | \
- ((u64)'P' << 16) | \
- ((u64)'W' << 24) | \
- ((u64)'M' << 32) | \
- ((u64)'\0' << 40) | \
- ((u64)'\0' << 48) | \
- ((u64)'\0' << 54))
+/* 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 "MSWIM\0\0\0" */
+ /* +0x00: Magic characters "MSWIM\0\0\0". */
le64 magic;
/* +0x08: Size of the WIM header, in bytes; WIM_HEADER_DISK_SIZE
- * expected (currently the only supported value). */
+ * expected (currently the only supported value). */
u32 hdr_size;
- /* +0x0c: Version of the WIM file
- * TODO */
+ /* +0x0c: Version of the WIM file. Recognized values are the
+ * WIM_VERSION_* constants from above. */
u32 wim_version;
- /* +0x10: Flags for the WIM file (WIM_HDR_FLAG_*) */
+ /* +0x10: Flags for the WIM file (WIM_HDR_FLAG_*). */
u32 wim_flags;
- /* +0x14: Chunk size for compressed resources in the WIM, or 0 if the
- * WIM is uncompressed. */
+ /* +0x14: Uncompressed chunk size for compressed resources in the WIM
+ * other than packed resources, or 0 if the WIM is uncompressed. */
u32 chunk_size;
/* +0x18: Globally unique identifier for the WIM file. Basically a
* is not split. */
u16 total_parts;
- /* +0x2c: Number of images in the WIM. */
+ /* +0x2c: Number of images in the WIM. */
u32 image_count;
- /* +0x30: Location and size of the WIM's lookup table. */
+ /* +0x30: Location and size of the WIM's lookup table. */
struct wim_reshdr_disk lookup_table_reshdr;
- /* +0x48: Location and size of the WIM's XML data. */
+ /* +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. */
+ * 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. */
+ * image is bootable. */
u32 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 the `struct wim_header_disk' is essential. */
+ * 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. */
+ /* +0x94: Unused bytes. */
u8 unused[60];
/* +0xd0 (208) */
} _packed_attribute;
-/* Header at the very beginning of the WIM file. This is the in-memory
- * representation and does not include all fields; see `struct wim_header_disk'
- * for the on-disk structure. */
+/* In-memory representation of a WIM header. See `struct wim_header_disk' for
+ * field descriptions. */
struct wim_header {
-
- /* Magic characters: either WIM_MAGIC or PWM_MAGIC. */
- le64 magic;
-
- /* Version of the WIM file */
+ u64 magic;
u32 wim_version;
-
- /* Bitwise OR of one or more of the WIM_HDR_FLAG_* defined below. */
u32 flags;
-
- /* Compressed resource chunk size */
u32 chunk_size;
-
- /* A unique identifier for the WIM file. */
u8 guid[WIM_GID_LEN];
-
- /* Part number of the WIM file in a spanned set. */
u16 part_number;
-
- /* Total number of parts in a spanned set. */
u16 total_parts;
-
- /* Number of images in the WIM file. */
u32 image_count;
-
- /* Location, size, and flags of the lookup table of the WIM. */
struct wim_reshdr lookup_table_reshdr;
-
- /* Location, size, and flags for the XML data of the WIM. */
struct wim_reshdr xml_data_reshdr;
-
- /* Location, size, and flags for the boot metadata. This means the
- * metadata resource for the image specified by boot_idx below. Should
- * be zeroed out if boot_idx is 0. */
struct wim_reshdr boot_metadata_reshdr;
-
- /* The index of the bootable image in the WIM file. If 0, there are no
- * bootable images available. */
u32 boot_idx;
-
- /* The location of the optional integrity table used to verify the
- * integrity WIM. Zeroed out if there is no integrity table.*/
struct wim_reshdr integrity_table_reshdr;
};
git://wimlib.net / wimlib / blobdiff