* wimlib; if not, see http://www.gnu.org/licenses/.
*/
-#include "wimlib_internal.h"
-#include "dentry.h"
-#include "lookup_table.h"
-#include "buffer_io.h"
-#include "sha1.h"
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "wimlib.h"
+#include "wimlib/dentry.h"
+#include "wimlib/endianness.h"
+#include "wimlib/error.h"
+#include "wimlib/file_io.h"
+#include "wimlib/lookup_table.h"
+#include "wimlib/resource.h"
+#include "wimlib/sha1.h"
#ifdef __WIN32__
-# include "win32.h"
+/* for read_win32_file_prefix(), read_win32_encrypted_file_prefix() */
+# include "wimlib/win32.h"
#endif
-#include <errno.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
+#ifdef WITH_NTFS_3G
+/* for read_ntfs_file_prefix() */
+# include "wimlib/ntfs_3g.h"
+#endif
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#endif
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
/*
* Reads all or part of a compressed WIM resource.
* Returns zero on success, nonzero on failure.
*/
static int
-read_compressed_resource(filedes_t in_fd,
+read_compressed_resource(int in_fd,
u64 resource_compressed_size,
u64 resource_uncompressed_size,
u64 resource_offset,
goto out;
}
-/*
- * Reads uncompressed data from an open file stream.
- */
-int
-read_uncompressed_resource(FILE *fp, u64 offset, u64 len, void *contents_ret)
-{
- if (fseeko(fp, offset, SEEK_SET) != 0) {
- ERROR("Failed to seek to byte %"PRIu64" of input file "
- "to read uncompressed resource (len = %"PRIu64")",
- offset, len);
- return WIMLIB_ERR_READ;
- }
- if (fread(contents_ret, 1, len, fp) != len) {
- if (feof(fp)) {
- ERROR("Unexpected EOF in uncompressed file resource");
- } else {
- ERROR("Failed to read %"PRIu64" bytes from "
- "uncompressed resource at offset %"PRIu64,
- len, offset);
- }
- return WIMLIB_ERR_READ;
- }
- return 0;
-}
-
-/* Reads the contents of a struct resource_entry, as represented in the on-disk
- * format, from the memory pointed to by @p, and fills in the fields of @entry.
- * A pointer to the byte after the memory read at @p is returned. */
-const void *
-get_resource_entry(const void *p, struct resource_entry *entry)
+/* Translates a WIM resource entry from the on-disk format to an in-memory
+ * format. */
+void
+get_resource_entry(const struct resource_entry_disk *disk_entry,
+ struct resource_entry *entry)
{
- u64 size;
- u8 flags;
-
- p = get_u56(p, &size);
- p = get_u8(p, &flags);
- entry->size = size;
- entry->flags = flags;
+ /* Note: disk_entry may not be 8 byte aligned--- in that case, the
+ * offset and original_size members will be unaligned. (This should be
+ * okay since `struct resource_entry_disk' is declared as packed.) */
+
+ /* Read the size and flags into a bitfield portably... */
+ entry->size = (((u64)disk_entry->size[0] << 0) |
+ ((u64)disk_entry->size[1] << 8) |
+ ((u64)disk_entry->size[2] << 16) |
+ ((u64)disk_entry->size[3] << 24) |
+ ((u64)disk_entry->size[4] << 32) |
+ ((u64)disk_entry->size[5] << 40) |
+ ((u64)disk_entry->size[6] << 48));
+ entry->flags = disk_entry->flags;
+ entry->offset = le64_to_cpu(disk_entry->offset);
+ entry->original_size = le64_to_cpu(disk_entry->original_size);
/* offset and original_size are truncated to 62 bits to avoid possible
* overflows, when converting to a signed 64-bit integer (off_t) or when
* adding size or original_size. This is okay since no one would ever
* actually have a WIM bigger than 4611686018427387903 bytes... */
- p = get_u64(p, &entry->offset);
if (entry->offset & 0xc000000000000000ULL) {
WARNING("Truncating offset in resource entry");
entry->offset &= 0x3fffffffffffffffULL;
}
- p = get_u64(p, &entry->original_size);
if (entry->original_size & 0xc000000000000000ULL) {
WARNING("Truncating original_size in resource entry");
entry->original_size &= 0x3fffffffffffffffULL;
}
- return p;
}
-/* Copies the struct resource_entry @entry to the memory pointed to by @p in the
- * on-disk format. A pointer to the byte after the memory written at @p is
- * returned. */
-void *
-put_resource_entry(void *p, const struct resource_entry *entry)
+/* Translates a WIM resource entry from an in-memory format into the on-disk
+ * format. */
+void
+put_resource_entry(const struct resource_entry *entry,
+ struct resource_entry_disk *disk_entry)
{
- p = put_u56(p, entry->size);
- p = put_u8(p, entry->flags);
- p = put_u64(p, entry->offset);
- p = put_u64(p, entry->original_size);
- return p;
+ /* Note: disk_entry may not be 8 byte aligned--- in that case, the
+ * offset and original_size members will be unaligned. (This should be
+ * okay since `struct resource_entry_disk' is declared as packed.) */
+ u64 size = entry->size;
+
+ disk_entry->size[0] = size >> 0;
+ disk_entry->size[1] = size >> 8;
+ disk_entry->size[2] = size >> 16;
+ disk_entry->size[3] = size >> 24;
+ disk_entry->size[4] = size >> 32;
+ disk_entry->size[5] = size >> 40;
+ disk_entry->size[6] = size >> 48;
+ disk_entry->flags = entry->flags;
+ disk_entry->offset = cpu_to_le64(entry->offset);
+ disk_entry->original_size = cpu_to_le64(entry->original_size);
}
static int
u64 offset)
{
WIMStruct *wim;
- filedes_t in_fd;
+ int in_fd;
int ret;
wimlib_assert(lte->resource_location == RESOURCE_IN_WIM);
* size until the resource is exhausted.
*
* If the resource is located in a WIM file, @flags can be:
- * * WIMLIB_RESOURCE_FLAG_THREADSAFE_READ if it must be safe to access the resource
- * concurrently by multiple threads.
* * WIMLIB_RESOURCE_FLAG_RAW if the raw compressed data is to be supplied
* instead of the uncompressed data.
* Otherwise, the @flags are ignored.
git://wimlib.net / wimlib / blobdiff