1 files changed, 98 insertions, 0 deletions
diff --git a/subversion/libsvn_fs_fs/load-index.c b/subversion/libsvn_fs_fs/load-index.c
new file mode 100644
index 0000000..3142e8e
--- /dev/null
+++ b/subversion/libsvn_fs_fs/load-index.c
@@ -0,0 +1,98 @@
+/* load-index-cmd.c -- implements the dump-index sub-command.
+ *
+ * ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one
+ *    or more contributor license agreements.  See the NOTICE file
+ *    distributed with this work for additional information
+ *    regarding copyright ownership.  The ASF licenses this file
+ *    to you under the Apache License, Version 2.0 (the
+ *    "License"); you may not use this file except in compliance
+ *    with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing,
+ *    software distributed under the License is distributed on an
+ *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *    KIND, either express or implied.  See the License for the
+ *    specific language governing permissions and limitations
+ *    under the License.
+ * ====================================================================
+ */
+
+#include "svn_pools.h"
+
+#include "private/svn_fs_fs_private.h"
+#include "private/svn_sorts_private.h"
+
+#include "index.h"
+#include "util.h"
+#include "transaction.h"
+
+/* A svn_sort__array compatible comparator function, sorting the
+ * svn_fs_fs__p2l_entry_t** given in LHS, RHS by offset. */
+static int
+compare_p2l_entry_revision(const void *lhs,
+                           const void *rhs)
+{
+  const svn_fs_fs__p2l_entry_t *lhs_entry
+    =*(const svn_fs_fs__p2l_entry_t **)lhs;
+  const svn_fs_fs__p2l_entry_t *rhs_entry
+    =*(const svn_fs_fs__p2l_entry_t **)rhs;
+
+  if (lhs_entry->offset < rhs_entry->offset)
+    return -1;
+
+  return lhs_entry->offset == rhs_entry->offset ? 0 : 1;
+}
+
+svn_error_t *
+svn_fs_fs__load_index(svn_fs_t *fs,
+                      svn_revnum_t revision,
+                      apr_array_header_t *entries,
+                      apr_pool_t *scratch_pool)
+{
+  apr_pool_t *iterpool = svn_pool_create(scratch_pool);
+
+  /* Check the FS format number. */
+  if (! svn_fs_fs__use_log_addressing(fs))
+    return svn_error_create(SVN_ERR_FS_UNSUPPORTED_FORMAT, NULL, NULL);
+
+  /* P2L index must be written in offset order.
+   * Sort ENTRIES accordingly. */
+  svn_sort__array(entries, compare_p2l_entry_revision);
+
+  /* Treat an empty array as a no-op instead error. */
+  if (entries->nelts != 0)
+    {
+      const char *l2p_proto_index;
+      const char *p2l_proto_index;
+      svn_fs_fs__revision_file_t *rev_file;
+
+      /* Open rev / pack file & trim indexes + footer off it. */
+      SVN_ERR(svn_fs_fs__open_pack_or_rev_file_writable(&rev_file, fs,
+                                                        revision, iterpool,
+                                                        iterpool));
+      SVN_ERR(svn_fs_fs__auto_read_footer(rev_file));
+      SVN_ERR(svn_io_file_trunc(rev_file->file, rev_file->l2p_offset,
+                                iterpool));
+
+      /* Create proto index files for the new index data
+       * (will be cleaned up automatically with iterpool). */
+      SVN_ERR(svn_fs_fs__p2l_index_from_p2l_entries(&p2l_proto_index, fs,
+                                                    rev_file, entries,
+                                                    iterpool, iterpool));
+      SVN_ERR(svn_fs_fs__l2p_index_from_p2l_entries(&l2p_proto_index, fs,
+                                                    entries, iterpool,
+                                                    iterpool));
+
+      /* Combine rev data with new index data. */
+      SVN_ERR(svn_fs_fs__add_index_data(fs, rev_file->file, l2p_proto_index,
+                                        p2l_proto_index,
+                                        rev_file->start_revision, iterpool));
+    }
+
+  svn_pool_destroy(iterpool);
+
+  return SVN_NO_ERROR;
+}