2 This file is part of GNUnet.
3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file monkey/edb_api.c
23 * @brief Monkey API for accessing the Expression Database (edb)
27 #include "gnunet_common.h"
28 #include "gnunet_monkey_edb.h"
33 * Context for Database connection and Expressions
35 struct GNUNET_MONKEY_EDB_Context
45 * Establish a connection to the Expression Database
47 * @param db_file_name path the Expression Database file
48 * @return context to use for Accessing the Expression Database, NULL on error
50 struct GNUNET_MONKEY_EDB_Context *
51 GNUNET_MONKEY_EDB_connect (const char *db_file_name)
54 struct GNUNET_MONKEY_EDB_Context *ctxt =
55 GNUNET_malloc (sizeof (struct GNUNET_MONKEY_EDB_Context));
57 err = sqlite3_open (db_file_name, &ctxt->db_handle);
60 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
61 "Cannot open Expression Database. `%s'\n",
62 sqlite3_errmsg (ctxt->db_handle));
70 * Disconnect from Database, and cleanup resources
72 * @param context context containing the Expression Database handle
73 * @return GNUNET_OK on success, GNUNET_NO on failure
76 GNUNET_MONKEY_EDB_disconnect (struct GNUNET_MONKEY_EDB_Context *cntxt)
78 sqlite3_close (cntxt->db_handle);
85 * Return the line number of the end-of-scope for the expression indicated by start_line_no
87 * @param cntxt context containing the Expression Database handle
88 * @param file_name path to the file in which the expression in question exists
89 * @param start_line_no expression's line
90 * @param iter callback function, iterator for values returned from the Database
91 * @param iter_cls closure for the expression iterator, will contain the scope-end line number
92 * @return GNUNET_OK on success, GNUNET_NO on failure
95 GNUNET_MONKEY_EDB_get_expression_scope_end(struct GNUNET_MONKEY_EDB_Context *cntxt,
96 const char *file_name, int start_line_no,
97 GNUNET_MONKEY_ExpressionIterator iter,
104 if (asprintf(&query, "select end_lineno from Expression where file_name LIKE \'%%/%s\' and start_lineno = %d", file_name, start_line_no) == -1) {
105 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Memory allocation problem occurred during creating database query!\n");
109 err = sqlite3_exec(cntxt->db_handle, query, iter, iter_cls, &errMsg);
111 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
112 "Error occurred while executing Database query. `%s'",
121 * Run an SQLite query to retrieve those expressions that are previous to
122 * given expression and are in the same scope of the given expression
124 * @param cntxt context containing the Expression Database handle
125 * @param file_name path to the file in which the expression in question exists
126 * @param start_line_no expression beginning line
127 * @param end_line_no line number for the expression's scope end
128 * @param iter callback function, iterator for expressions returned from the Database
129 * @param iter_cls closure for the expression iterator
130 * @return GNUNET_OK success, GNUNET_NO failure
133 GNUNET_MONKEY_EDB_get_expressions (struct GNUNET_MONKEY_EDB_Context *cntxt,
134 const char *file_name, int start_line_no,
136 GNUNET_MONKEY_ExpressionIterator iter,
144 "select expr_syntax, start_lineno from Expression where file_name LIKE \'%%/%s\' and start_lineno <= %d and end_lineno = %d",
145 file_name, start_line_no, end_line_no) == -1)
147 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
148 "Memory allocation problem occurred!\n");
152 err = sqlite3_exec (cntxt->db_handle, query, iter, iter_cls, &errMsg);
155 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
156 "Error occurred while executing Database query. `%s'",