# include <stdlib.h>
#endif
-/* On-disk format of the WIM header. */
-struct wim_header_disk {
-
- /* Magic characters "MSWIM\0\0\0" */
- le64 magic;
-
- /* Size of the WIM header, in bytes; WIM_HEADER_DISK_SIZE expected
- * (currently the only supported value). */
- u32 hdr_size;
-
- /* Version of the WIM file; WIM_VERSION expected (currently the only
- * supported value). */
- u32 wim_version;
-
- /* Flags for the WIM file (WIM_HDR_FLAG_*) */
- u32 wim_flags;
-
- /* Uncompressed chunk size of resources in the WIM. 0 if the WIM is
- * uncompressed. If compressed, WIM_CHUNK_SIZE is expected (currently
- * the only supported value). */
- u32 chunk_size;
-
- /* Globally unique identifier for the WIM file. Basically a bunch of
- * random bytes. */
- u8 guid[WIM_GID_LEN];
-
- /* Number of this WIM part in the split WIM file, indexed from 1, or 1
- * if the WIM is not split. */
- u16 part_number;
-
- /* Total number of parts of the split WIM file, or 1 if the WIM is not
- * split. */
- u16 total_parts;
-
- /* Number of images in the WIM. */
- u32 image_count;
-
- /* Location and size of the WIM's lookup table. */
- struct resource_entry_disk lookup_table_res_entry;
-
- /* Location and size of the WIM's XML data. */
- struct resource_entry_disk xml_data_res_entry;
-
- /* Location and size of metadata resource for the bootable image of the
- * WIM, or all zeroes if no image is bootable. */
- struct resource_entry_disk boot_metadata_res_entry;
-
- /* 1-based index of the bootable image of the WIM, or 0 if no image is
- * bootable. */
- u32 boot_idx;
-
- /* Location and size of the WIM's integrity table, or all zeroes if the
- * WIM has no integrity table.
- *
- * Note the integrity_table_res_entry 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. */
- struct resource_entry_disk integrity_table_res_entry;
-
- /* Unused bytes. */
- u8 unused[60];
-} _packed_attribute;
-
/*
* Reads the header from a WIM file.
*
wimlib_assert(in_fd->offset == 0);
- if (!filename) {
+ if (filename == NULL) {
pipe_str = alloca(40);
tsprintf(pipe_str, T("[fd %d]"), in_fd->fd);
filename = pipe_str;
ERROR("\"%"TS"\": The WIM header says the WIM version is %u, "
"but wimlib only knows about version %u",
filename, le32_to_cpu(disk_hdr.wim_version), WIM_VERSION);
+ if (le32_to_cpu(disk_hdr.wim_flags) & WIM_HDR_FLAG_COMPRESS_LZMS) {
+ ERROR("\"%"TS"\": This WIM uses LZMS compression, "
+ "which is not supported by wimlib.", filename);
+ }
return WIMLIB_ERR_UNKNOWN_VERSION;
}
hdr->flags = le32_to_cpu(disk_hdr.wim_flags);
- if (le32_to_cpu(disk_hdr.chunk_size) != WIM_CHUNK_SIZE &&
- (hdr->flags & WIM_HDR_FLAG_COMPRESSION)) {
- ERROR("\"%"TS"\": Unexpected chunk size of %u! Ask the author to "
- "implement support for other chunk sizes.",
- filename, le32_to_cpu(disk_hdr.chunk_size));
- ERROR("(Or it might just be that the WIM header is invalid.)");
- return WIMLIB_ERR_INVALID_CHUNK_SIZE;
- }
-
+ hdr->chunk_size = le32_to_cpu(disk_hdr.chunk_size);
memcpy(hdr->guid, disk_hdr.guid, WIM_GID_LEN);
-
hdr->part_number = le16_to_cpu(disk_hdr.part_number);
hdr->total_parts = le16_to_cpu(disk_hdr.total_parts);
disk_hdr.hdr_size = cpu_to_le32(sizeof(struct wim_header_disk));
disk_hdr.wim_version = cpu_to_le32(WIM_VERSION);
disk_hdr.wim_flags = cpu_to_le32(hdr->flags);
- disk_hdr.chunk_size = cpu_to_le32((hdr->flags & WIM_HDR_FLAG_COMPRESSION) ?
- WIM_CHUNK_SIZE : 0);
+ if (hdr->flags & WIM_HDR_FLAG_COMPRESSION)
+ disk_hdr.chunk_size = cpu_to_le32(hdr->chunk_size);
+ else
+ disk_hdr.chunk_size = 0;
memcpy(disk_hdr.guid, hdr->guid, WIM_GID_LEN);
disk_hdr.part_number = cpu_to_le16(hdr->part_number);
offsetof(struct wim_header_disk, wim_flags));
}
-/*
- * Initializes the header for a WIM file.
- */
int
-init_wim_header(struct wim_header *hdr, int ctype)
+set_wim_hdr_cflags(int ctype, struct wim_header *hdr)
{
- memset(hdr, 0, sizeof(struct wim_header));
+ hdr->flags &= ~(WIM_HDR_FLAG_COMPRESSION |
+ WIM_HDR_FLAG_COMPRESS_LZX |
+ WIM_HDR_FLAG_COMPRESS_RESERVED |
+ WIM_HDR_FLAG_COMPRESS_XPRESS |
+ WIM_HDR_FLAG_COMPRESS_LZMS);
switch (ctype) {
+
case WIMLIB_COMPRESSION_TYPE_NONE:
- hdr->flags = 0;
- break;
+ return 0;
+
case WIMLIB_COMPRESSION_TYPE_LZX:
- hdr->flags = WIM_HDR_FLAG_COMPRESSION |
- WIM_HDR_FLAG_COMPRESS_LZX;
- break;
+ hdr->flags |= WIM_HDR_FLAG_COMPRESSION | WIM_HDR_FLAG_COMPRESS_LZX;
+ return 0;
+
case WIMLIB_COMPRESSION_TYPE_XPRESS:
- hdr->flags = WIM_HDR_FLAG_COMPRESSION |
- WIM_HDR_FLAG_COMPRESS_XPRESS;
- break;
+ hdr->flags |= WIM_HDR_FLAG_COMPRESSION | WIM_HDR_FLAG_COMPRESS_XPRESS;
+ return 0;
+
default:
+ return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
+ }
+}
+
+/*
+ * Initializes the header for a WIM file.
+ */
+int
+init_wim_header(struct wim_header *hdr, int ctype, u32 chunk_size)
+{
+ memset(hdr, 0, sizeof(struct wim_header));
+ hdr->magic = WIM_MAGIC;
+ if (set_wim_hdr_cflags(ctype, hdr)) {
ERROR("Invalid compression type specified (%d)", ctype);
return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
}
+ hdr->chunk_size = chunk_size;
hdr->total_parts = 1;
hdr->part_number = 1;
randomize_byte_array(hdr->guid, sizeof(hdr->guid));
- hdr->magic = WIM_MAGIC;
return 0;
}
if (hdr_flags[i].flag & hdr->flags)
tprintf(T(" WIM_HDR_FLAG_%s is set\n"), hdr_flags[i].name);
- tprintf(T("Chunk Size = %u\n"), WIM_CHUNK_SIZE);
+ tprintf(T("Chunk Size = %u\n"), wim->hdr.chunk_size);
tfputs (T("GUID = "), stdout);
print_byte_field(hdr->guid, WIM_GID_LEN, stdout);
tputchar(T('\n'));
git://wimlib.net / wimlib / blobdiff