X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fblob_table.c;h=b3eb63fcad750d17ea7dbe471a543748738a1043;hp=08859c42787baa5147a398bdacdecae579f69275;hb=b82856cb22783df0e19990eb68d3694753f52220;hpb=593660b74e10631a4e1acca5ea684e4a55e84682

diff --git a/src/blob_table.c b/src/blob_table.c
index 08859c42..b3eb63fc 100644
--- a/src/blob_table.c
+++ b/src/blob_table.c
@@ -406,7 +406,7 @@ cmp_blobs_by_sequential_order(const void *p1, const void *p2)
 
 		/* Different (possibly split) WIMs?  */
 		if (wim1 != wim2) {
-			v = memcmp(wim1->hdr.guid, wim2->hdr.guid, WIM_GUID_LEN);
+			v = cmp_guids(wim1->hdr.guid, wim2->hdr.guid);
 			if (v)
 				return v;
 		}
@@ -611,7 +611,7 @@ do_load_solid_info(WIMStruct *wim, struct wim_resource_descriptor **rdescs,
 
 		rdesc = rdescs[i];
 
-		wim_res_hdr_to_desc(&reshdr, wim, rdesc);
+		wim_reshdr_to_desc(&reshdr, wim, rdesc);
 
 		/* For solid resources, the uncompressed size, compression type,
 		 * and chunk size are stored in the resource itself, not in the
@@ -856,6 +856,7 @@ read_blob_table(WIMStruct *wim)
 	struct blob_table *table = NULL;
 	struct blob_descriptor *cur_blob = NULL;
 	size_t num_duplicate_blobs = 0;
+	size_t num_empty_blobs = 0;
 	size_t num_wrong_part_blobs = 0;
 	u32 image_index = 0;
 	struct wim_resource_descriptor **cur_solid_rdescs = NULL;
@@ -953,27 +954,13 @@ read_blob_table(WIMStruct *wim)
 					goto out;
 			}
 
-			/* How to handle an uncompressed resource with its
-			 * uncompressed size different from its compressed size?
-			 *
-			 * Based on a simple test, WIMGAPI seems to handle this
-			 * as follows:
-			 *
-			 * if (size_in_wim > uncompressed_size) {
-			 *	Ignore uncompressed_size; use size_in_wim
-			 *	instead.
-			 * } else {
-			 *	Honor uncompressed_size, but treat the part of
-			 *	the file data above size_in_wim as all zeros.
-			 * }
-			 *
-			 * So we will do the same.  */
-			if (unlikely(!(reshdr.flags &
-				       WIM_RESHDR_FLAG_COMPRESSED) &&
-				     (reshdr.size_in_wim >
-				      reshdr.uncompressed_size)))
+			if (unlikely(!(reshdr.flags & WIM_RESHDR_FLAG_COMPRESSED) &&
+				     (reshdr.size_in_wim != reshdr.uncompressed_size)))
 			{
-				reshdr.uncompressed_size = reshdr.size_in_wim;
+				ERROR("Uncompressed resource has "
+				      "size_in_wim != uncompressed_size");
+				ret = WIMLIB_ERR_INVALID_LOOKUP_TABLE_ENTRY;
+				goto out;
 			}
 
 			/* Set up a resource descriptor for this blob.  */
@@ -982,20 +969,24 @@ read_blob_table(WIMStruct *wim)
 			if (!rdesc)
 				goto oom;
 
-			wim_res_hdr_to_desc(&reshdr, wim, rdesc);
-
-			blob_set_is_located_in_nonsolid_wim_resource(cur_blob, rdesc);
+			wim_reshdr_to_desc_and_blob(&reshdr, wim, rdesc, cur_blob);
 		}
 
 		/* cur_blob is now a blob bound to a resource.  */
 
 		/* Ignore entries with all zeroes in the hash field.  */
-		if (is_zero_hash(cur_blob->hash))
+		if (unlikely(is_zero_hash(cur_blob->hash)))
 			goto free_cur_blob_and_continue;
 
+		/* Verify that the blob has nonzero size.  */
+		if (unlikely(cur_blob->size == 0)) {
+			num_empty_blobs++;
+			goto free_cur_blob_and_continue;
+		}
+
 		/* Verify that the part number matches that of the underlying
 		 * WIM file.  */
-		if (part_number != wim->hdr.part_number) {
+		if (unlikely(part_number != wim->hdr.part_number)) {
 			num_wrong_part_blobs++;
 			goto free_cur_blob_and_continue;
 		}
@@ -1098,6 +1089,9 @@ read_blob_table(WIMStruct *wim)
 	if (num_duplicate_blobs > 0)
 		WARNING("Ignoring %zu duplicate blobs", num_duplicate_blobs);
 
+	if (num_empty_blobs > 0)
+		WARNING("Ignoring %zu empty blobs", num_empty_blobs);
+
 	if (num_wrong_part_blobs > 0) {
 		WARNING("Ignoring %zu blobs with wrong part number",
 			num_wrong_part_blobs);