wc_db_util.c revision 362181 
1/*
2 * wc_db_util.c :  Various util functions for wc_db(_pdh)
3 *
4 * ====================================================================
5 *    Licensed to the Apache Software Foundation (ASF) under one
6 *    or more contributor license agreements.  See the NOTICE file
7 *    distributed with this work for additional information
8 *    regarding copyright ownership.  The ASF licenses this file
9 *    to you under the Apache License, Version 2.0 (the
10 *    "License"); you may not use this file except in compliance
11 *    with the License.  You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 *    Unless required by applicable law or agreed to in writing,
16 *    software distributed under the License is distributed on an
17 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
18 *    KIND, either express or implied.  See the License for the
19 *    specific language governing permissions and limitations
20 *    under the License.
21 * ====================================================================
22 */
23
24/* About this file:
25   This file is meant to be a stash of fairly low-level functions used by both
26   wc_db.c and wc_db_pdh.c.  In breaking stuff out of the monolithic wc_db.c,
27   I have discovered that some utility functions are used by bits in both
28   files.  Rather than shoehorn those functions into one file or the other, or
29   create circular dependencies between the files, I felt a third file, with
30   a well-defined scope, would be sensible.  History will judge its effect.
31
32   The goal of it file is simple: just execute SQLite statements.  That is,
33   functions in this file should have no knowledge of pdh's or db's, and
34   should just operate on the raw sdb object.  If a function requires more
35   information than that, it shouldn't be in here.  -hkw
36 */
37
38#define SVN_WC__I_AM_WC_DB
39
40#include "svn_dirent_uri.h"
41#include "private/svn_sqlite.h"
42
43#include "wc.h"
44#include "adm_files.h"
45#include "wc_db_private.h"
46#include "wc-queries.h"
47
48#include "svn_private_config.h"
49
50WC_QUERIES_SQL_DECLARE_STATEMENTS(statements);
51
52
53
54/* */
55svn_error_t *
56svn_wc__db_util_fetch_wc_id(apr_int64_t *wc_id,
57                            svn_sqlite__db_t *sdb,
58                            apr_pool_t *scratch_pool)
59{
60  svn_sqlite__stmt_t *stmt;
61  svn_boolean_t have_row;
62
63  /* ### cheat. we know there is just one WORKING_COPY row, and it has a
64     ### NULL value for local_abspath. */
65  SVN_ERR(svn_sqlite__get_statement(&stmt, sdb, STMT_SELECT_WCROOT_NULL));
66  SVN_ERR(svn_sqlite__step(&have_row, stmt));
67  if (!have_row)
68    return svn_error_createf(SVN_ERR_WC_CORRUPT, svn_sqlite__reset(stmt),
69                             _("Missing a row in WCROOT."));
70
71  SVN_ERR_ASSERT(!svn_sqlite__column_is_null(stmt, 0));
72  *wc_id = svn_sqlite__column_int64(stmt, 0);
73
74  return svn_error_trace(svn_sqlite__reset(stmt));
75}
76
77
78
79
80/* An SQLite application defined function that allows SQL queries to
81   use "relpath_depth(local_relpath)".  */
82static svn_error_t *
83relpath_depth_sqlite(svn_sqlite__context_t *sctx,
84                     int argc,
85                     svn_sqlite__value_t *values[],
86                     void *baton)
87{
88  const char *path = NULL;
89  apr_int64_t depth;
90
91  if (argc == 1 && svn_sqlite__value_type(values[0]) == SVN_SQLITE__TEXT)
92    path = svn_sqlite__value_text(values[0]);
93  if (!path)
94    {
95      svn_sqlite__result_null(sctx);
96      return SVN_NO_ERROR;
97    }
98
99  depth = *path ? 1 : 0;
100  while (*path)
101    {
102      if (*path == '/')
103        ++depth;
104      ++path;
105    }
106  svn_sqlite__result_int64(sctx, depth);
107
108  return SVN_NO_ERROR;
109}
110
111
112svn_error_t *
113svn_wc__db_util_open_db(svn_sqlite__db_t **sdb,
114                        const char *dir_abspath,
115                        const char *sdb_fname,
116                        svn_sqlite__mode_t smode,
117                        svn_boolean_t exclusive,
118                        apr_int32_t timeout,
119                        const char *const *my_statements,
120                        apr_pool_t *result_pool,
121                        apr_pool_t *scratch_pool)
122{
123  const char *sdb_abspath = svn_wc__adm_child(dir_abspath, sdb_fname,
124                                              scratch_pool);
125
126  if (smode != svn_sqlite__mode_rwcreate)
127    {
128      svn_node_kind_t kind;
129
130      /* A file stat is much cheaper than a failed database open handled
131         by SQLite. */
132      SVN_ERR(svn_io_check_path(sdb_abspath, &kind, scratch_pool));
133
134      if (kind != svn_node_file)
135        return svn_error_createf(APR_ENOENT, NULL,
136                                 _("Working copy database '%s' not found"),
137                                 svn_dirent_local_style(sdb_abspath,
138                                                        scratch_pool));
139    }
140
141  SVN_ERR(svn_sqlite__open(sdb, sdb_abspath, smode,
142                           my_statements ? my_statements : statements,
143                           0, NULL, timeout, result_pool, scratch_pool));
144
145  if (exclusive)
146    SVN_ERR(svn_sqlite__exec_statements(*sdb, STMT_PRAGMA_LOCKING_MODE));
147
148  SVN_ERR(svn_sqlite__create_scalar_function(*sdb, "relpath_depth", 1,
149                                             TRUE /* deterministic */,
150                                             relpath_depth_sqlite, NULL));
151
152  return SVN_NO_ERROR;
153}
154
155