1 /*
2 * SysDB - src/include/frontend/parser.h
3 * Copyright (C) 2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #ifndef SDB_FRONTEND_PARSER_H
29 #define SDB_FRONTEND_PARSER_H 1
31 #include "core/store.h"
32 #include "frontend/connection.h"
33 #include "utils/llist.h"
34 #include "utils/strbuf.h"
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
40 /* parser modes */
41 enum {
42 /* parser accepts any command statement */
43 SDB_PARSE_DEFAULT = 0,
45 /* parser accepts any conditional statement */
46 SDB_PARSE_COND = 1 << 1,
48 /* parser accepts any arithmetic expression */
49 SDB_PARSE_ARITH = 1 << 2,
50 };
52 /* YY_EXTRA data */
53 typedef struct {
54 /* list of sdb_conn_node_t objects */
55 sdb_llist_t *parsetree;
57 /* parser mode */
58 int mode;
60 /* buffer for parser error messages */
61 sdb_strbuf_t *errbuf;
62 } sdb_fe_yyextra_t;
64 /* see yyscan_t */
65 typedef void *sdb_fe_yyscan_t;
67 sdb_fe_yyscan_t
68 sdb_fe_scanner_init(const char *str, int len, sdb_fe_yyextra_t *yyext);
70 void
71 sdb_fe_scanner_destroy(sdb_fe_yyscan_t scanner);
73 int
74 sdb_fe_yyparse(sdb_fe_yyscan_t scanner);
76 sdb_store_matcher_t *
77 sdb_fe_parse_matcher(const char *cond, int len, sdb_strbuf_t *errbuf);
79 sdb_store_expr_t *
80 sdb_fe_parse_expr(const char *expr, int len, sdb_strbuf_t *errbuf);
82 /*
83 * sdb_fe_analyze:
84 * Analyze a parsed node, checking for semantical errors. Error messages will
85 * be written to the string buffer, if provided.
86 *
87 * Returns:
88 * - 0 if the node is semantically correct
89 * - a negative value else
90 */
91 int
92 sdb_fe_analyze(sdb_conn_node_t *node, sdb_strbuf_t *errbuf);
94 #ifdef __cplusplus
95 } /* extern "C" */
96 #endif
98 #endif /* ! SDB_FRONTEND_PARSER_H */
100 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */