+++ /dev/null
-/*
- * swm.c
- *
- * Functions to help handle split WIMs.
- */
-
-/*
- * Copyright (C) 2012, 2013 Eric Biggers
- *
- * This file is part of wimlib, a library for working with WIM files.
- *
- * wimlib is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 3 of the License, or (at your option)
- * any later version.
- *
- * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with wimlib; if not, see http://www.gnu.org/licenses/.
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include "wimlib/error.h"
-#include "wimlib/lookup_table.h"
-#include "wimlib/swm.h"
-#include "wimlib/wim.h"
-
-static int
-move_lte_to_table(struct wim_lookup_table_entry *lte, void *combined_table)
-{
- hlist_del(<e->hash_list);
- lookup_table_insert((struct wim_lookup_table*)combined_table, lte);
- return 0;
-}
-
-static void
-lookup_table_join(struct wim_lookup_table *combined_table,
- struct wim_lookup_table *part_table)
-{
- for_lookup_table_entry(part_table, move_lte_to_table, combined_table);
- part_table->num_entries = 0;
-}
-
-/*
- * merge_lookup_tables() - Merge lookup tables from the parts of a split WIM.
- *
- * @wim specifies the first part, while @additional_swms and @num_additional_swms
- * specify an array of pointers to the WIMStruct's for additional split WIM parts.
- *
- * The reason we join the lookup tables is so we only have to search one lookup
- * table to find the location of a resource in the entire WIM.
- */
-void
-merge_lookup_tables(WIMStruct *wim,
- WIMStruct **additional_swms,
- unsigned num_additional_swms)
-{
- for (unsigned i = 0; i < num_additional_swms; i++)
- lookup_table_join(wim->lookup_table, additional_swms[i]->lookup_table);
-}
-
-static int
-move_lte_to_orig_table(struct wim_lookup_table_entry *lte, void *_wim)
-{
- WIMStruct *wim = _wim;
- if (lte->wim != wim) {
- move_lte_to_table(lte, lte->wim->lookup_table);
- wim->lookup_table->num_entries--;
- }
- return 0;
-}
-
-/* Undo merge_lookup_tables(), given the first WIM part that contains the merged
- * lookup table. */
-void
-unmerge_lookup_table(WIMStruct *wim)
-{
- for_lookup_table_entry(wim->lookup_table, move_lte_to_orig_table, wim);
-}
-
-/*
- * verify_swm_set: - Sanity checks to make sure a set of WIMs correctly
- * correspond to a spanned set.
- *
- * @wim:
- * Part 1 of the set.
- *
- * @additional_swms:
- * All parts of the set other than part 1.
- *
- * @num_additional_swms:
- * Number of WIMStructs in @additional_swms. Or, the total number of parts
- * in the set minus 1.
- *
- * @return:
- * 0 on success; WIMLIB_ERR_SPLIT_INVALID if the set is not valid.
- */
-int
-verify_swm_set(WIMStruct *wim, WIMStruct **additional_swms,
- unsigned num_additional_swms)
-{
- unsigned total_parts = wim->hdr.total_parts;
- int ctype;
- const u8 *guid;
-
- if (total_parts != num_additional_swms + 1) {
- ERROR("`%"TS"' says there are %u parts in the spanned set, "
- "but %"TS"%u part%"TS" provided",
- wim->filename, total_parts,
- (num_additional_swms + 1 < total_parts) ? T("only ") : T(""),
- num_additional_swms + 1,
- (num_additional_swms) ? T("s were") : T(" was"));
- return WIMLIB_ERR_SPLIT_INVALID;
- }
- if (wim->hdr.part_number != 1) {
- ERROR("WIM `%"TS"' is not the first part of the split WIM.",
- wim->filename);
- return WIMLIB_ERR_SPLIT_INVALID;
- }
- for (unsigned i = 0; i < num_additional_swms; i++) {
- if (additional_swms[i]->hdr.total_parts != total_parts) {
- ERROR("WIM `%"TS"' says there are %u parts in the "
- "spanned set, but %u parts were provided",
- additional_swms[i]->filename,
- additional_swms[i]->hdr.total_parts,
- total_parts);
- return WIMLIB_ERR_SPLIT_INVALID;
- }
- }
-
- /* keep track of ctype and guid just to make sure they are the same for
- * all the WIMs. */
- ctype = wim->compression_type;
- guid = wim->hdr.guid;
-
- {
- /* parts_to_swms is not allocated at function scope because it
- * should only be allocated after num_additional_swms was
- * checked to be the same as wim->hdr.total_parts. Otherwise, it
- * could be unexpectedly high and cause a stack overflow. */
- WIMStruct *parts_to_swms[num_additional_swms];
- ZERO_ARRAY(parts_to_swms);
- for (unsigned i = 0; i < num_additional_swms; i++) {
-
- WIMStruct *swm = additional_swms[i];
-
- if (swm->compression_type != ctype) {
- ERROR("The split WIMs do not all have the same "
- "compression type");
- return WIMLIB_ERR_SPLIT_INVALID;
- }
- if (memcmp(guid, swm->hdr.guid, WIM_GID_LEN) != 0) {
- ERROR("The split WIMs do not all have the same "
- "GUID");
- return WIMLIB_ERR_SPLIT_INVALID;
- }
- if (swm->hdr.part_number == 1) {
- ERROR("WIMs `%"TS"' and `%"TS"' both are marked "
- "as the first WIM in the spanned set",
- wim->filename, swm->filename);
- return WIMLIB_ERR_SPLIT_INVALID;
- }
- if (swm->hdr.part_number == 0 ||
- swm->hdr.part_number > total_parts)
- {
- ERROR("WIM `%"TS"' says it is part %u in the "
- "spanned set, but the part number must "
- "be in the range [1, %u]",
- swm->filename, swm->hdr.part_number, total_parts);
- return WIMLIB_ERR_SPLIT_INVALID;
- }
- if (parts_to_swms[swm->hdr.part_number - 2])
- {
- ERROR("`%"TS"' and `%"TS"' are both marked as "
- "part %u of %u in the spanned set",
- parts_to_swms[swm->hdr.part_number - 2]->filename,
- swm->filename,
- swm->hdr.part_number,
- total_parts);
- return WIMLIB_ERR_SPLIT_INVALID;
- } else {
- parts_to_swms[swm->hdr.part_number - 2] = swm;
- }
- }
- }
- return 0;
-}
git://wimlib.net / wimlib / blobdiff