dump-index.c revision 362181 
1/* dump-index.c -- implements the svn_fs_fs__dump_index private API
2 *
3 * ====================================================================
4 *    Licensed to the Apache Software Foundation (ASF) under one
5 *    or more contributor license agreements.  See the NOTICE file
6 *    distributed with this work for additional information
7 *    regarding copyright ownership.  The ASF licenses this file
8 *    to you under the Apache License, Version 2.0 (the
9 *    "License"); you may not use this file except in compliance
10 *    with the License.  You may obtain a copy of the License at
11 *
12 *      http://www.apache.org/licenses/LICENSE-2.0
13 *
14 *    Unless required by applicable law or agreed to in writing,
15 *    software distributed under the License is distributed on an
16 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 *    KIND, either express or implied.  See the License for the
18 *    specific language governing permissions and limitations
19 *    under the License.
20 * ====================================================================
21 */
22
23#include "svn_pools.h"
24
25#include "fs_fs.h"
26#include "index.h"
27#include "rev_file.h"
28#include "util.h"
29
30#include "../libsvn_fs/fs-loader.h"
31
32svn_error_t *
33svn_fs_fs__dump_index(svn_fs_t *fs,
34                      svn_revnum_t revision,
35                      svn_fs_fs__dump_index_func_t callback_func,
36                      void *callback_baton,
37                      svn_cancel_func_t cancel_func,
38                      void *cancel_baton,
39                      apr_pool_t *scratch_pool)
40{
41  fs_fs_data_t *ffd = fs->fsap_data;
42  svn_fs_fs__revision_file_t *rev_file;
43  int i;
44  apr_off_t offset, max_offset;
45  apr_pool_t *iterpool = svn_pool_create(scratch_pool);
46
47  /* Check the FS format. */
48  if (! svn_fs_fs__use_log_addressing(fs))
49    return svn_error_create(SVN_ERR_FS_UNSUPPORTED_FORMAT, NULL, NULL);
50
51  /* Revision & index file access object. */
52  SVN_ERR(svn_fs_fs__open_pack_or_rev_file(&rev_file, fs, revision,
53                                           scratch_pool, iterpool));
54
55  /* Offset range to cover. */
56  SVN_ERR(svn_fs_fs__p2l_get_max_offset(&max_offset, fs, rev_file, revision,
57                                        scratch_pool));
58
59  /* Walk through all P2L index entries in offset order. */
60  for (offset = 0; offset < max_offset; )
61    {
62      apr_array_header_t *entries;
63
64      /* Read entries for the next block.  There will be no overlaps since
65       * we start at the first offset not covered. */
66      svn_pool_clear(iterpool);
67      SVN_ERR(svn_fs_fs__p2l_index_lookup(&entries, fs, rev_file, revision,
68                                          offset, ffd->p2l_page_size,
69                                          iterpool, iterpool));
70
71      /* Print entries for this block, one line per entry. */
72      for (i = 0; i < entries->nelts && offset < max_offset; ++i)
73        {
74          const svn_fs_fs__p2l_entry_t *entry
75            = &APR_ARRAY_IDX(entries, i, const svn_fs_fs__p2l_entry_t);
76          offset = entry->offset + entry->size;
77
78          /* Cancellation support */
79          if (cancel_func)
80            SVN_ERR(cancel_func(cancel_baton));
81
82          /* Invoke processing callback. */
83          SVN_ERR(callback_func(entry, callback_baton, iterpool));
84        }
85    }
86
87  svn_pool_destroy(iterpool);
88
89  return SVN_NO_ERROR;
90}
91