9c312311 |
1 | /* This file is part of the Linux Trace Toolkit viewer |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License Version 2 as |
6 | * published by the Free Software Foundation; |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public License |
14 | * along with this program; if not, write to the Free Software |
15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
16 | * MA 02111-1307, USA. |
17 | */ |
18 | |
48f6f3c2 |
19 | #ifndef FILTER_H |
20 | #define FILTER_H |
21 | |
31452f49 |
22 | #include <lttv/traceset.h> |
a4c292d4 |
23 | #include <lttv/tracecontext.h> |
24 | #include <lttv/state.h> |
25 | #include <ltt/ltt.h> |
26 | #include <ltt/event.h> |
27 | |
28 | #define AVERAGE_EXPRESSION_LENGTH 6 |
29 | #define MAX_FACTOR 1.5 |
31452f49 |
30 | |
48f6f3c2 |
31 | /* A filter expression consists in nested AND, OR and NOT expressions |
32 | involving boolean relation (>, >=, =, !=, <, <=) between event fields and |
33 | specific values. It is compiled into an efficient data structure which |
34 | is used in functions to check if a given event or tracefile satisfies the |
35 | filter. |
36 | |
37 | The grammar for filters is: |
38 | |
39 | filter = expression |
40 | |
41 | expression = "(" expression ")" | "!" expression | |
42 | expression "&&" expression | expression "||" expression | |
43 | simpleExpression |
44 | |
45 | simpleExpression = fieldPath op value |
46 | |
47 | fieldPath = fieldComponent [ "." fieldPath ] |
48 | |
49 | fieldComponent = name [ "[" integer "]" ] |
50 | |
51 | value = integer | double | string |
52 | |
53 | */ |
54 | |
0769c82f |
55 | static GQuark |
56 | LTTV_FILTER_TRACE, |
57 | LTTV_FILTER_TRACESET, |
58 | LTTV_FILTER_TRACEFILE, |
59 | LTTV_FILTER_STATE, |
60 | LTTV_FILTER_EVENT; |
61 | |
84a333d6 |
62 | /** |
63 | * @enum lttv_expression_op |
64 | */ |
65 | typedef enum _lttv_expression_op |
66 | { |
67 | LTTV_FIELD_EQ, /** equal */ |
68 | LTTV_FIELD_NE, /** not equal */ |
69 | LTTV_FIELD_LT, /** lower than */ |
70 | LTTV_FIELD_LE, /** lower or equal */ |
71 | LTTV_FIELD_GT, /** greater than */ |
72 | LTTV_FIELD_GE /** greater or equal */ |
73 | } lttv_expression_op; |
74 | |
75 | typedef enum _lttv_expression_type |
76 | { |
77 | LTTV_EXPRESSION, |
78 | LTTV_SIMPLE_EXPRESSION |
79 | } lttv_expression_type; |
80 | |
81 | typedef struct _lttv_simple_expression |
82 | { |
83 | lttv_expression_op op; |
84 | char *field_name; |
85 | char *value; |
86 | } lttv_simple_expression; |
87 | |
a4c292d4 |
88 | |
89 | //typedef union _tmp { |
90 | // struct lttv_expression *e; |
91 | // lttv_field_relation *se; |
92 | //} tmp; |
93 | /* |
84a333d6 |
94 | typedef struct _lttv_expression |
95 | { |
96 | gboolean or; |
97 | gboolean not; |
98 | gboolean and; |
99 | gboolean xor; |
100 | gboolean simple_expression; |
a4c292d4 |
101 | // tmp e; |
102 | } lttv_expression; |
103 | */ |
104 | |
105 | typedef union _lttv_expression { |
106 | lttv_simple_expression se; |
107 | |
84a333d6 |
108 | } lttv_expression; |
109 | |
110 | typedef struct _lttv_filter_tree { |
111 | lttv_expression* node; |
112 | struct lttv_filter_tree* r_child; |
113 | struct lttv_filter_tree* l_child; |
114 | } lttv_filter_tree; |
115 | |
31452f49 |
116 | /** |
117 | * @struct lttv_filter |
118 | * ( will later contain a binary tree of filtering options ) |
119 | */ |
84a333d6 |
120 | typedef struct _lttv_filter { |
121 | lttv_filter_tree* tree; |
122 | } lttv_filter; |
123 | |
0769c82f |
124 | gboolean parse_field_path(GList* fp); |
125 | |
84a333d6 |
126 | gboolean parse_simple_expression(GString* expression); |
48f6f3c2 |
127 | |
48f6f3c2 |
128 | /* Compile the filter expression into an efficient data structure */ |
a4c292d4 |
129 | lttv_filter *lttv_filter_new(char *expression, LttvTraceState *tfs); |
48f6f3c2 |
130 | |
131 | |
132 | /* Check if the tracefile or event satisfies the filter. The arguments are |
133 | declared as void * to allow these functions to be used as hooks. */ |
134 | |
0769c82f |
135 | gboolean lttv_filter_tracefile(lttv_filter *filter, LttTracefile *tracefile); |
48f6f3c2 |
136 | |
a4c292d4 |
137 | gboolean lttv_filter_event(lttv_filter *filter, LttEvent *event); |
48f6f3c2 |
138 | |
139 | #endif // FILTER_H |
140 | |